ol 750 measurement systems ol 750 measurement systems optronic laboratories, inc

Optronic Laboratories, Inc.Optronic Laboratories, Inc.

OL 750 Measurement OL 750 Measurement SystemsSystems

OL 750 Measurement OL 750 Measurement SystemsSystems

Optronic Laboratories, Inc.Optronic Laboratories, Inc.Optronic Laboratories, Inc.Optronic Laboratories, Inc.


Outline of PresentationOutline of PresentationOutline of PresentationOutline of Presentation

About Optronic Laboratories, IncAbout Optronic Laboratories, IncThe OL 750 Series SpectroradiometerThe OL 750 Series SpectroradiometerSource measurementsSource measurementsTransmission measurementsTransmission measurementsReflectance measurementsReflectance measurementsDetector measurementsDetector measurements

About Optronic Laboratories, IncAbout Optronic Laboratories, IncThe OL 750 Series SpectroradiometerThe OL 750 Series SpectroradiometerSource measurementsSource measurementsTransmission measurementsTransmission measurementsReflectance measurementsReflectance measurementsDetector measurementsDetector measurements


About Optronic About Optronic Laboratories, Inc.Laboratories, Inc.About Optronic About Optronic

Laboratories, Inc.Laboratories, Inc.Optronic Laboratories, Inc. was established in 1970 Optronic Laboratories, Inc. was established in 1970

by two eminent researchers at NIST (then NBS). by two eminent researchers at NIST (then NBS). Facilities were modeled after NIST, and Optronic Facilities were modeled after NIST, and Optronic

Laboratories, Inc. achieved a worldwide reputation Laboratories, Inc. achieved a worldwide reputation for excellence in light measurement and calibration.for excellence in light measurement and calibration.

Continuing to work closely with NIST, the Continuing to work closely with NIST, the development of new instruments and techniques at development of new instruments and techniques at Optronic Laboratories, Inc. constantly improves the Optronic Laboratories, Inc. constantly improves the

accuracy and precision of light measurement.accuracy and precision of light measurement.

Optronic Laboratories, Inc. was established in 1970 Optronic Laboratories, Inc. was established in 1970 by two eminent researchers at NIST (then NBS). by two eminent researchers at NIST (then NBS). Facilities were modeled after NIST, and Optronic Facilities were modeled after NIST, and Optronic

Laboratories, Inc. achieved a worldwide reputation Laboratories, Inc. achieved a worldwide reputation for excellence in light measurement and calibration.for excellence in light measurement and calibration.

Continuing to work closely with NIST, the Continuing to work closely with NIST, the development of new instruments and techniques at development of new instruments and techniques at Optronic Laboratories, Inc. constantly improves the Optronic Laboratories, Inc. constantly improves the

accuracy and precision of light measurement.accuracy and precision of light measurement.



Laboratories, Inc.Laboratories, Inc.

In 1998, Optronic Laboratories, Inc. moved In 1998, Optronic Laboratories, Inc. moved into its new 25,000 square foot purpose-built into its new 25,000 square foot purpose-built

facility, consolidating and expanding facility, consolidating and expanding production, R & D and calibration facilitiesproduction, R & D and calibration facilities

In 1998, Optronic Laboratories, Inc. moved In 1998, Optronic Laboratories, Inc. moved into its new 25,000 square foot purpose-built into its new 25,000 square foot purpose-built

facility, consolidating and expanding facility, consolidating and expanding production, R & D and calibration facilitiesproduction, R & D and calibration facilities


Spectroradiometers:Spectroradiometers: laboratory & field portablelaboratory & field portable

Spectroradiometers:Spectroradiometers: laboratory & field portablelaboratory & field portable

Broad-band radiometers & Broad-band radiometers & photometers:photometers: DC, AC, pulsed or modulated sourcesDC, AC, pulsed or modulated sources

Broad-band radiometers & Broad-band radiometers & photometers:photometers: DC, AC, pulsed or modulated sourcesDC, AC, pulsed or modulated sources

Sphere systems:Sphere systems: from 1” to 76” diameter as standardfrom 1” to 76” diameter as standard

Sphere systems:Sphere systems: from 1” to 76” diameter as standardfrom 1” to 76” diameter as standard

NIST-traceable calibration sources, NIST-traceable calibration sources, materials & detectors:materials & detectors: from 200 nm to 30,000 nmfrom 200 nm to 30,000 nm

NIST-traceable calibration sources, NIST-traceable calibration sources, materials & detectors:materials & detectors: from 200 nm to 30,000 nmfrom 200 nm to 30,000 nm

Measurement services:Measurement services: sources, materials & detectorssources, materials & detectors

Measurement services:Measurement services: sources, materials & detectorssources, materials & detectors

Customization/new product Customization/new product developmentdevelopment

Customization/new product Customization/new product developmentdevelopment

Training, consultation & advice Training, consultation & advice Training, consultation & advice Training, consultation & advice


Laboratories, Inc.Laboratories, Inc.Optronic Laboratories’ instruments & Optronic Laboratories’ instruments & services include:services include:


The OL Series 750 The OL Series 750 MonochromatorsMonochromators


The heart of any spectroradiometric The heart of any spectroradiometric system is the monochromator, but…system is the monochromator, but…

It must give the right bandpasses –It must give the right bandpasses – Too large and spectra are distortedToo large and spectra are distorted Too small and signals are lowToo small and signals are low

It must give high spectral purity (low It must give high spectral purity (low stray light) so only the wavelength of stray light) so only the wavelength of interest is detectedinterest is detected

The heart of any spectroradiometric The heart of any spectroradiometric system is the monochromator, but…system is the monochromator, but…

It must give the right bandpasses –It must give the right bandpasses – Too large and spectra are distortedToo large and spectra are distorted Too small and signals are lowToo small and signals are low

It must give high spectral purity (low It must give high spectral purity (low stray light) so only the wavelength of stray light) so only the wavelength of interest is detectedinterest is detected




Available in single Available in single and double and double (shown) versions(shown) versions

F/4 optics for high F/4 optics for high throughputthroughput

Very low stray lightVery low stray light Numerous special Numerous special

features for most features for most accurate resultsaccurate results

Available in single Available in single and double and double (shown) versions(shown) versions

F/4 optics for high F/4 optics for high throughputthroughput

Very low stray lightVery low stray light Numerous special Numerous special

features for most features for most accurate resultsaccurate results




Large range of Large range of gratings availablegratings available

Optimised for high Optimised for high efficiencyefficiency

Optimised for wide Optimised for wide wavelength rangewavelength range

Optimised for high Optimised for high resolutionresolution

Large range of Large range of gratings availablegratings available

Optimised for high Optimised for high efficiencyefficiency

Optimised for wide Optimised for wide wavelength rangewavelength range

Optimised for high Optimised for high resolutionresolutionTri-grating mounts change

gratings automaticallyTri-grating mounts change

gratings automatically




Range of Plug-in input Range of Plug-in input accessoriesaccessories

Choppers (shown) for Choppers (shown) for IR detectorsIR detectors

Automatic control of Automatic control of chopper speed and chopper speed and “open” position stop“open” position stop

Filter-wheel for input Filter-wheel for input attenuation or filteringattenuation or filtering

Range of Plug-in input Range of Plug-in input accessoriesaccessories

Choppers (shown) for Choppers (shown) for IR detectorsIR detectors

Automatic control of Automatic control of chopper speed and chopper speed and “open” position stop“open” position stop

Filter-wheel for input Filter-wheel for input attenuation or filteringattenuation or filteringVersatile plug-in chopper or

filter wheel input accessoriesVersatile plug-in chopper or filter wheel input accessories




Fully automated 11 Fully automated 11 position blocking-position blocking-filter wheelfilter wheel

Includes SHUT Includes SHUT position for dark position for dark current readingscurrent readings

Optimised filters Optimised filters for widest for widest wavelength rangewavelength range

Fully automated 11 Fully automated 11 position blocking-position blocking-filter wheelfilter wheel

Includes SHUT Includes SHUT position for dark position for dark current readingscurrent readings

Optimised filters Optimised filters for widest for widest wavelength rangewavelength rangeBlocking-filter wheel

changes filters automatically Blocking-filter wheel

changes filters automatically


Blocking filters:how they work



Gratings diffract light Gratings diffract light at different angles at different angles depending on depending on wavelengthwavelength

400nm will also 400nm will also diffract at the same diffract at the same angle as 800nm angle as 800nm (since (since 2 x 400 = 800)2 x 400 = 800)

A blocking filter A blocking filter removes the 400nm so removes the 400nm so just 800nm is leftjust 800nm is left

Gratings diffract light Gratings diffract light at different angles at different angles depending on depending on wavelengthwavelength

400nm will also 400nm will also diffract at the same diffract at the same angle as 800nm angle as 800nm (since (since 2 x 400 = 800)2 x 400 = 800)

A blocking filter A blocking filter removes the 400nm so removes the 400nm so just 800nm is leftjust 800nm is left

400nm +

800nm

400nm +

800nm400nm400nm400nm400nm

800nm800nm

Blocking filter

Blocking filter

grating




Light passes into the Light passes into the monochromator monochromator through the entrance through the entrance slit, then onto the slit, then onto the first collimating first collimating mirror.mirror.

Light passes into the Light passes into the monochromator monochromator through the entrance through the entrance slit, then onto the slit, then onto the first collimating first collimating mirror.mirror.




Collimated (parallel) Collimated (parallel) light is directed onto light is directed onto the grating.the grating.

Collimated (parallel) Collimated (parallel) light is directed onto light is directed onto the grating.the grating.




The grating diffracts The grating diffracts the light, sending the light, sending each wavelength off each wavelength off at a different angle.at a different angle.

The desired The desired wavelength is wavelength is collected by the first collected by the first focussing mirror….focussing mirror….

The grating diffracts The grating diffracts the light, sending the light, sending each wavelength off each wavelength off at a different angle.at a different angle.

The desired The desired wavelength is wavelength is collected by the first collected by the first focussing mirror….focussing mirror….




……which focuses it at which focuses it at the middle slit.the middle slit.

A second collimating A second collimating mirror collects this mirror collects this beam…beam…

……which focuses it at which focuses it at the middle slit.the middle slit.

A second collimating A second collimating mirror collects this mirror collects this beam…beam…




……and collimates it and collimates it onto a second onto a second grating.grating.

Since the second Since the second grating is linked to grating is linked to the first, they are at the first, they are at the same angle and the same angle and hence the same hence the same wavelength.wavelength.

……and collimates it and collimates it onto a second onto a second grating.grating.

Since the second Since the second grating is linked to grating is linked to the first, they are at the first, they are at the same angle and the same angle and hence the same hence the same wavelength.wavelength.




This second grating This second grating acts like the first, but acts like the first, but the spectral purity is the spectral purity is increased by many increased by many decades.decades.

This second grating This second grating acts like the first, but acts like the first, but the spectral purity is the spectral purity is increased by many increased by many decades.decades.




The pure The pure monochromatic light, monochromatic light, at the wavelength at the wavelength desired, is then desired, is then focussed onto the focussed onto the exit slit and emerges exit slit and emerges from the from the monochromatormonochromator

The pure The pure monochromatic light, monochromatic light, at the wavelength at the wavelength desired, is then desired, is then focussed onto the focussed onto the exit slit and emerges exit slit and emerges from the from the monochromatormonochromator


Source MeasurementSource MeasurementSource MeasurementSource Measurement

The most common measurements of The most common measurements of sources include:sources include:

Radiance - Light emitted in a Radiance - Light emitted in a particular directionparticular direction

Irradiance – Light falling onto a Irradiance – Light falling onto a surfacesurface

Total flux – Total light emitted in all Total flux – Total light emitted in all directionsdirections

The most common measurements of The most common measurements of sources include:sources include:

Radiance - Light emitted in a Radiance - Light emitted in a particular directionparticular direction

Irradiance – Light falling onto a Irradiance – Light falling onto a surfacesurface

Total flux – Total light emitted in all Total flux – Total light emitted in all directionsdirections


Radiance MeasurementRadiance MeasurementRadiance MeasurementRadiance Measurement

Radiance is normally Radiance is normally measured with a measured with a telescopetelescope

The solid collection The solid collection angle corresponds to angle corresponds to the size of the lensthe size of the lens

The measurement The measurement area corresponds to area corresponds to the field-of-view of the the field-of-view of the telescopetelescope

Radiance is normally Radiance is normally measured with a measured with a telescopetelescope

The solid collection The solid collection angle corresponds to angle corresponds to the size of the lensthe size of the lens

The measurement The measurement area corresponds to area corresponds to the field-of-view of the the field-of-view of the telescopetelescope

Solid Collection

angle

Solid Collection

angle

Measurement area

Measurement area

SourceSource



The term “radiance” The term “radiance” in this section also in this section also refers to related units refers to related units such as luminance such as luminance and radiant intensityand radiant intensity

Radiant intensity Radiant intensity applies to small or applies to small or distant objects that distant objects that are smaller than the are smaller than the telescope field-of-viewtelescope field-of-view

The term “radiance” The term “radiance” in this section also in this section also refers to related units refers to related units such as luminance such as luminance and radiant intensityand radiant intensity

Radiant intensity Radiant intensity applies to small or applies to small or distant objects that distant objects that are smaller than the are smaller than the telescope field-of-viewtelescope field-of-view

SourceSource

Measurement area

Measurement area

Solid Collection

angle

Solid Collection

angle



Optronic Laboratories, Inc. Optronic Laboratories, Inc. manufactures a large range of manufactures a large range of telescope, microscope and imaging telescope, microscope and imaging optic modules for radiance optic modules for radiance measurementsmeasurements

To illustrate a typical system for To illustrate a typical system for radiance measurement, we will use radiance measurement, we will use the OL Series 730-9 Telescopesthe OL Series 730-9 Telescopes

Optronic Laboratories, Inc. Optronic Laboratories, Inc. manufactures a large range of manufactures a large range of telescope, microscope and imaging telescope, microscope and imaging optic modules for radiance optic modules for radiance measurementsmeasurements

To illustrate a typical system for To illustrate a typical system for radiance measurement, we will use radiance measurement, we will use the OL Series 730-9 Telescopesthe OL Series 730-9 Telescopes


The OL Series 730-9 The OL Series 730-9 TelescopesTelescopes


For luminance and radiance of sources For luminance and radiance of sources from 200 nm to 14,000 nmfrom 200 nm to 14,000 nm


Wide range of lenses

Wide range of lenses

Reflex viewingReflex viewing

Adjustable focusAdjustable focus






Light coming from the source…

Light coming from the source…

Here is how it worksHere is how it works






The reflex mirror lets the user see what is being measured

The reflex mirror lets the user see what is being measured

…is picked up at some distance and focussed by the OL 730-9

…is picked up at some distance and focussed by the OL 730-9

The sectional drawing shows what happens inside the solid housing

The sectional drawing shows what happens inside the solid housing

If the mirror is flipped out of the way

If the mirror is flipped out of the way






The image is sent via the field-of-view aperture to the spectroradiometer

The image is sent via the field-of-view aperture to the spectroradiometer



Putting together an OL 750 radiance systemPutting together an OL 750 radiance systemPutting together an OL 750 radiance systemPutting together an OL 750 radiance system

Then we add the OL 730-9Then we add the OL 730-9

And a detectorAnd a

detector

Positive location & easy assemblyPositive location & easy assembly

We start with an OL 750

monochromator

We start with an OL 750

monochromator



We have a We have a complete radiance complete radiance measurement measurement systemsystem

We have a We have a complete radiance complete radiance measurement measurement systemsystem


Irradiance and Total Irradiance and Total Flux MeasurementFlux Measurement

Irradiance and Total Irradiance and Total Flux MeasurementFlux Measurement

To measure irradiance (or To measure irradiance (or illuminance), a cosine response illuminance), a cosine response integrating sphere such as the OL IS-integrating sphere such as the OL IS-670 is substituted for the OL 730-9670 is substituted for the OL 730-9

To measure total flux, a large sphere To measure total flux, a large sphere (typically 18 to 76 inches) is (typically 18 to 76 inches) is substituted for the OL 730-9substituted for the OL 730-9

To measure irradiance (or To measure irradiance (or illuminance), a cosine response illuminance), a cosine response integrating sphere such as the OL IS-integrating sphere such as the OL IS-670 is substituted for the OL 730-9670 is substituted for the OL 730-9

To measure total flux, a large sphere To measure total flux, a large sphere (typically 18 to 76 inches) is (typically 18 to 76 inches) is substituted for the OL 730-9substituted for the OL 730-9


Irradiance Irradiance MeasurementMeasurement

Irradiance Irradiance MeasurementMeasurement

A complete A complete irradiance irradiance measurement measurement systemsystem

A complete A complete irradiance irradiance measurement measurement systemsystem

OL IS-670 near-perfect cosine

response integrating

sphere

OL IS-670 near-perfect cosine

response integrating

sphere


Other measurementsOther measurementsOther measurementsOther measurements

For transmission, reflection and For transmission, reflection and detector response measurements, a detector response measurements, a light source at the entrance of the OL light source at the entrance of the OL 750 creates monochromatic light at 750 creates monochromatic light at the exitthe exit

The OL Series 740-20 is an ideal light The OL Series 740-20 is an ideal light source for most applicationssource for most applications

For transmission, reflection and For transmission, reflection and detector response measurements, a detector response measurements, a light source at the entrance of the OL light source at the entrance of the OL 750 creates monochromatic light at 750 creates monochromatic light at the exitthe exit

The OL Series 740-20 is an ideal light The OL Series 740-20 is an ideal light source for most applicationssource for most applications


The OL Series 740-20 The OL Series 740-20 Light SourcesLight Sources


Single and double Single and double lamp versionslamp versions

UV lampUV lamp 200nm to 400nm200nm to 400nm

Tungsten lampTungsten lamp 250nm to 2500nm250nm to 2500nm

GlowbarGlowbar 1000nm to 1000nm to

30000nm30000nm

Single and double Single and double lamp versionslamp versions

UV lampUV lamp 200nm to 400nm200nm to 400nm

Tungsten lampTungsten lamp 250nm to 2500nm250nm to 2500nm

GlowbarGlowbar 1000nm to 1000nm to

30000nm30000nm




Optics match the Optics match the OL Series 750 OL Series 750 MonochromatorsMonochromators

Easy switching Easy switching from one source …from one source …

Optics match the Optics match the OL Series 750 OL Series 750 MonochromatorsMonochromators

Easy switching Easy switching from one source …from one source …




……to the otherto the other……to the otherto the other

Optics match the OL series 750 monochromators

Easy switching from one source …

Optics match the OL series 750 monochromators

Easy switching from one source …

Fully automated switching available

Fully automated switching available


The OL 750 + OL 740-The OL 750 + OL 740-2020

The OL 750 + OL 740-The OL 750 + OL 740-2020

200 to 30,000 nm 200 to 30,000 nm coveragecoverage

monochromatic light monochromatic light prevents sample prevents sample heatingheating

Suits a very wide Suits a very wide range of standard OL range of standard OL accessoriesaccessories

Suits many existing Suits many existing and future and future applicationsapplications

200 to 30,000 nm 200 to 30,000 nm coveragecoverage

monochromatic light monochromatic light prevents sample prevents sample heatingheating

Suits a very wide Suits a very wide range of standard OL range of standard OL accessoriesaccessories

Suits many existing Suits many existing and future and future applicationsapplications


Transmittance Transmittance MeasurementMeasurementTransmittance Transmittance MeasurementMeasurement

Transmittance can be regular (like a Transmittance can be regular (like a window) or diffuse (like paper)window) or diffuse (like paper)

Optronic Laboratories, Inc. manufacture a Optronic Laboratories, Inc. manufacture a wide range of accessories for regular and wide range of accessories for regular and diffuse transmittancediffuse transmittance

To illustrate a regular transmittance To illustrate a regular transmittance measurement system, we will use the OL measurement system, we will use the OL Series 740-73 Transmittance AttachmentSeries 740-73 Transmittance Attachment

Transmittance can be regular (like a Transmittance can be regular (like a window) or diffuse (like paper)window) or diffuse (like paper)


To illustrate a regular transmittance To illustrate a regular transmittance measurement system, we will use the OL measurement system, we will use the OL Series 740-73 Transmittance AttachmentSeries 740-73 Transmittance Attachment


The OL Series 740-73The OL Series 740-73The OL Series 740-73The OL Series 740-73

The OL 740-73 collimates light through the sample The OL 740-73 collimates light through the sample compartment and refocuses onto the detectorcompartment and refocuses onto the detector

The OL 740-73 collimates light through the sample The OL 740-73 collimates light through the sample compartment and refocuses onto the detectorcompartment and refocuses onto the detector

Collimated light

Collimated light

DetectorDetector

SampleSample

After a 100% scan (with setup as shown), the sample is placed in the beam

After a 100% scan (with setup as shown), the sample is placed in the beam



The ratio of a scan with the sample in place to the The ratio of a scan with the sample in place to the 100% scan is the transmittance of the sample100% scan is the transmittance of the sample

The ratio of a scan with the sample in place to the The ratio of a scan with the sample in place to the 100% scan is the transmittance of the sample100% scan is the transmittance of the sample


The OL 740-73 + OL The OL 740-73 + OL 750 + OL 740-20750 + OL 740-20

The OL 740-73 + OL The OL 740-73 + OL 750 + OL 740-20750 + OL 740-20

When the system is assembled, the transmission of When the system is assembled, the transmission of a sample can be measured up to 14,000 nma sample can be measured up to 14,000 nm

When the system is assembled, the transmission of When the system is assembled, the transmission of a sample can be measured up to 14,000 nma sample can be measured up to 14,000 nm

Other transmittance accessories are available

to cover the range200 nm to 30,000nm

Other transmittance accessories are available

to cover the range200 nm to 30,000nm


Reflectance Reflectance MeasurementMeasurementReflectance Reflectance

MeasurementMeasurement Reflectance can be specular (like a mirror) Reflectance can be specular (like a mirror)

or diffuse (like paper)or diffuse (like paper) Optronic Laboratories, Inc. manufacture a Optronic Laboratories, Inc. manufacture a

wide range of accessories for regular and wide range of accessories for regular and diffuse transmittancediffuse transmittance

To illustrate a specular reflectance To illustrate a specular reflectance measurement system, we will use the OL measurement system, we will use the OL 750-75MA Goniometer Attachment750-75MA Goniometer Attachment

Reflectance can be specular (like a mirror) Reflectance can be specular (like a mirror) or diffuse (like paper)or diffuse (like paper)


To illustrate a specular reflectance To illustrate a specular reflectance measurement system, we will use the OL measurement system, we will use the OL 750-75MA Goniometer Attachment750-75MA Goniometer Attachment


The OL 750-75MA for The OL 750-75MA for Specular ReflectanceSpecular ReflectanceThe OL 750-75MA for The OL 750-75MA for Specular ReflectanceSpecular Reflectance

Measures direct Measures direct beam for true beam for true absolute results absolute results without the need without the need for standard for standard mirrorsmirrors

Measures direct Measures direct beam for true beam for true absolute results absolute results without the need without the need for standard for standard mirrorsmirrors


The OL 750-75MA for The OL 750-75MA for Specular ReflectanceSpecular ReflectanceThe OL 750-75MA for The OL 750-75MA for Specular ReflectanceSpecular Reflectance

Full 10Full 10° to 80° ° to 80° angle-of-incidence angle-of-incidence measurementsmeasurements

Detector tracks Detector tracks incidence angle or incidence angle or moves free to map moves free to map other anglesother angles

Full 10Full 10° to 80° ° to 80° angle-of-incidence angle-of-incidence measurementsmeasurements

Detector tracks Detector tracks incidence angle or incidence angle or moves free to map moves free to map other anglesother angles


The OL 750-75MA for The OL 750-75MA for Specular TransmittanceSpecular Transmittance

The OL 750-75MA for The OL 750-75MA for Specular TransmittanceSpecular Transmittance

Transmittance at Transmittance at any angle, 0any angle, 0° to 80°° to 80°

Transmittance at Transmittance at any angle, 0any angle, 0° to 80°° to 80°


The OL 750-75MA for The OL 750-75MA for BRDF MeasurementsBRDF MeasurementsThe OL 750-75MA for The OL 750-75MA for BRDF MeasurementsBRDF Measurements

Detector moves Detector moves independent of independent of incident angle for incident angle for BRDF & BTDF BRDF & BTDF measurementsmeasurements

Detector moves Detector moves independent of independent of incident angle for incident angle for BRDF & BTDF BRDF & BTDF measurementsmeasurements


The OL 750 + OL 740-The OL 750 + OL 740-20 + OL 750-75MA20 + OL 750-75MA


If we put these together…If we put these together…If we put these together…If we put these together…

Positive location&

Easy assembly

Positive location&

Easy assembly




Materials can be measured from 200nm to 30,000nmMaterials can be measured from 200nm to 30,000nmMaterials can be measured from 200nm to 30,000nmMaterials can be measured from 200nm to 30,000nm


Diffuse ReflectanceDiffuse ReflectanceDiffuse ReflectanceDiffuse Reflectance

The OL 750-75MA can be used to The OL 750-75MA can be used to map diffuse reflectance by map diffuse reflectance by measuring one angle at a timemeasuring one angle at a time

To give diffuse reflectance in one To give diffuse reflectance in one measurement however, an measurement however, an integrating sphere is requiredintegrating sphere is required

The OL 750-75MA can be used to The OL 750-75MA can be used to map diffuse reflectance by map diffuse reflectance by measuring one angle at a timemeasuring one angle at a time

To give diffuse reflectance in one To give diffuse reflectance in one measurement however, an measurement however, an integrating sphere is requiredintegrating sphere is required



Optronic Laboratories, Inc. Optronic Laboratories, Inc. manufacture a range of fixed-angle manufacture a range of fixed-angle and Edward Spheres for diffuse and Edward Spheres for diffuse reflectance measurements.reflectance measurements.

To illustrate a diffuse reflectance To illustrate a diffuse reflectance measurement system, we will use the measurement system, we will use the OL 750-70 Diffuse Reflectance OL 750-70 Diffuse Reflectance Attachment.Attachment.

Optronic Laboratories, Inc. Optronic Laboratories, Inc. manufacture a range of fixed-angle manufacture a range of fixed-angle and Edward Spheres for diffuse and Edward Spheres for diffuse reflectance measurements.reflectance measurements.

To illustrate a diffuse reflectance To illustrate a diffuse reflectance measurement system, we will use the measurement system, we will use the OL 750-70 Diffuse Reflectance OL 750-70 Diffuse Reflectance Attachment.Attachment.



Diffuse reflectance Diffuse reflectance is measured is measured against a standardagainst a standard

A scan is run with A scan is run with the standard, then the standard, then another with the another with the samplesample

Diffuse reflectance Diffuse reflectance is measured is measured against a standardagainst a standard

A scan is run with A scan is run with the standard, then the standard, then another with the another with the samplesample

StandardStandardSampleSample

Optronic Laboratories, Inc.Optronic Laboratories, Inc.SampleSample


From a simple From a simple viewpoint, the ratio viewpoint, the ratio of these scans of these scans would indicate the would indicate the sample reflectancesample reflectance

However, the However, the throughput of the throughput of the sphere changes sphere changes due to the sampledue to the sample

From a simple From a simple viewpoint, the ratio viewpoint, the ratio of these scans of these scans would indicate the would indicate the sample reflectancesample reflectance

However, the However, the throughput of the throughput of the sphere changes sphere changes due to the sampledue to the sample

CAUTION:Change in throughput

DO NOT USE

CAUTION:Change in throughput

DO NOT USE



Instead, the double Instead, the double beam method beam method should be usedshould be used

This involves 4 This involves 4 scans, 3 to scans, 3 to calibrate and one calibrate and one to measureto measure

Instead, the double Instead, the double beam method beam method should be usedshould be used

This involves 4 This involves 4 scans, 3 to scans, 3 to calibrate and one calibrate and one to measureto measure

StandardStandardSampleSample

Scan 1Scan 1

Scan 2Scan 2

Scan 3Scan 3

Scan 4Scan 4



The scans with the The scans with the beam directed at beam directed at the wall of the the wall of the sphere correct for sphere correct for the throughput the throughput changeschanges

the true reflectance the true reflectance can then be can then be calculatedcalculated

The scans with the The scans with the beam directed at beam directed at the wall of the the wall of the sphere correct for sphere correct for the throughput the throughput changeschanges

the true reflectance the true reflectance can then be can then be calculatedcalculatedStandardStandardSampleSample

Scan 2Scan 2Scan 4Scan 4



Uses the double Uses the double beam method for beam method for accurate values of accurate values of reflectancereflectance

Software guides Software guides the user through the user through the calibration and the calibration and measurementmeasurement

Uses the double Uses the double beam method for beam method for accurate values of accurate values of reflectancereflectance

Software guides Software guides the user through the user through the calibration and the calibration and measurementmeasurement

Standard or sample

Standard or sample

Beam switch mirror

Beam switch mirror



2 versions of the 2 versions of the OL 750-70 are OL 750-70 are availableavailable PTFE sphere PTFE sphere

coating for 250nm coating for 250nm to 2,500nmto 2,500nm

Gold sphere Gold sphere coating for 1,000nm coating for 1,000nm to 30,000nmto 30,000nm

2 versions of the 2 versions of the OL 750-70 are OL 750-70 are availableavailable PTFE sphere PTFE sphere

coating for 250nm coating for 250nm to 2,500nmto 2,500nm

Gold sphere Gold sphere coating for 1,000nm coating for 1,000nm to 30,000nmto 30,000nmStandard or

sampleStandard or

sample


The OL 750 + OL 740-The OL 750 + OL 740-20 + OL 750-7020 + OL 750-70



And add a detector

And add a detector

Positive location&

Easy assembly

Positive location&

Easy assembly




We have a complete system for diffuse reflectanceWe have a complete system for diffuse reflectanceWe have a complete system for diffuse reflectanceWe have a complete system for diffuse reflectance

The light-trap supplied also allows measurements

which exclude specular reflections

The light-trap supplied also allows measurements

which exclude specular reflections


Detector Spectral Detector Spectral ResponseResponse


In order to characterize their In order to characterize their performance in a particular performance in a particular applications, single detectors, array applications, single detectors, array detectors and assemblies often need detectors and assemblies often need spectral response to be knownspectral response to be known

For example, photopic detectors can For example, photopic detectors can be analysed for V(be analysed for V() matching) matching

In order to characterize their In order to characterize their performance in a particular performance in a particular applications, single detectors, array applications, single detectors, array detectors and assemblies often need detectors and assemblies often need spectral response to be knownspectral response to be known

For example, photopic detectors can For example, photopic detectors can be analysed for V(be analysed for V() matching) matching




Measurements are generally consistent Measurements are generally consistent with detector use, and may require a large with detector use, and may require a large collimated beam, a small spot, a diffuse collimated beam, a small spot, a diffuse source or other geometrysource or other geometry

Optronic Laboratories, Inc. manufactures Optronic Laboratories, Inc. manufactures a wide range of accessories for most a wide range of accessories for most detector measurement requirements, detector measurement requirements, including quantum efficiencyincluding quantum efficiency

Measurements are generally consistent Measurements are generally consistent with detector use, and may require a large with detector use, and may require a large collimated beam, a small spot, a diffuse collimated beam, a small spot, a diffuse source or other geometrysource or other geometry

Optronic Laboratories, Inc. manufactures Optronic Laboratories, Inc. manufactures a wide range of accessories for most a wide range of accessories for most detector measurement requirements, detector measurement requirements, including quantum efficiencyincluding quantum efficiency




Optronic Laboratories, Inc. provides Optronic Laboratories, Inc. provides standard detectors, traceable to NIST standard detectors, traceable to NIST and other National Laboratoriesand other National Laboratories

To illustrate a detector spectral To illustrate a detector spectral response system, we will use the OL response system, we will use the OL 750-10C All Mirror Collimator750-10C All Mirror Collimator

Optronic Laboratories, Inc. provides Optronic Laboratories, Inc. provides standard detectors, traceable to NIST standard detectors, traceable to NIST and other National Laboratoriesand other National Laboratories

To illustrate a detector spectral To illustrate a detector spectral response system, we will use the OL response system, we will use the OL 750-10C All Mirror Collimator750-10C All Mirror Collimator


The OL 750-10CThe OL 750-10CThe OL 750-10CThe OL 750-10C

2 inch diameter 2 inch diameter beambeam

Excellent beam Excellent beam uniformityuniformity

Constant Constant collimation at all collimation at all wavelengthswavelengths

2 inch diameter 2 inch diameter beambeam

Excellent beam Excellent beam uniformityuniformity

Constant Constant collimation at all collimation at all wavelengthswavelengths


The OL 750 + OL 740-The OL 750 + OL 740-20 + OL 750-10C20 + OL 750-10C






We have a complete system for detector responseWe have a complete system for detector responseWe have a complete system for detector responseWe have a complete system for detector response

First we calibrate with the standard

detector

First we calibrate with the standard

detector

Then we measure the test detector

Then we measure the test detector


More InformationMore InformationMore InformationMore Information

The systems illustrated represent The systems illustrated represent just a few of the accessories from just a few of the accessories from Optronic Laboratories, Inc.Optronic Laboratories, Inc.

For more information:For more information: Contact your local Optronic Contact your local Optronic

Laboratories’ representativeLaboratories’ representative

Visit our website at Visit our website at www.olinet.comwww.olinet.com

The systems illustrated represent The systems illustrated represent just a few of the accessories from just a few of the accessories from Optronic Laboratories, Inc.Optronic Laboratories, Inc.

For more information:For more information: Contact your local Optronic Contact your local Optronic

Laboratories’ representativeLaboratories’ representative

Visit our website at Visit our website at www.olinet.comwww.olinet.com

ol 750 measurement systems ol 750 measurement systems optronic laboratories, inc

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