Blake Ipson

John Chen

Matt Graeff

Steven Benedict

Weston Welge

Team PhotoConEXPO LabDepartment of Electrical, Computer, and Energy EngineeringUniversity of Colorado at Boulder

Preliminary Design ReviewPreliminary Design Review

Prototype a fast, high-resolution lithography system

Eventual use in Extreme Polymer Optics (EXPO) Lab

Applications in medical endoscopy, holographic data storage

John

Accepts file of input vectors or coordinates, modulates laser diode power for “even” beam power

Draw 2D images of ~3.5 mm scale on a CMOS camera◦ End goal of drawing 3D images in a polymer sample

Implement a single drawing method, but expandable if desired◦ Draw using dots or vectors

Images accurate to one-tenth of the focused spot size (~15 μm)

Stand-alone and “transportable”◦ User needs only a PC and 120 V wall power supply

John

John

Weston

CollimatorA390

f ~ 4.6 mm

ObjectivePAC016

f ~ 25 mm

CameraMT9M001

6.66 x 5.32 mm Galvanometer

• Mirror tilt restricted to ~2o or optical tilt of up to ~4o

• Range on camera of ~3.5 mm• Simulation from Zemax

Weston

CollimatorA390

f ~ 4.6 mm

ObjectivePAC016

f ~ 25 mm

CameraMT9M001

6.66 x 5.32 mm Galvanometer

Weston

• Connectorized, adjustable collimation lensesFocal length fcol = 4.6 mm

• Galvo scanner = 15 rad repeatability

• CMOS camera6.66 x 5.32, 5.2 m pixels

• Pigtailed laser diode2wLD =2.9 m mode diameter, NALD = 0.12 , λ=405nm

Weston

Microcontroller

Steven

Vector Parsing

Memory(User Input)

Power Modulation

Velocity/Position

Calculation

Determine Drawing Method

To Laser

FromLaser

FromPC

ToGalvanometer

FromGalvanometer

Need to parse floating point vectors/coordinates

Need to run computations on floating point acceleration, velocity, position, and power values from galvo and laser

Must be able to add additional sensors to system for future research

Must be able to store vector files and other user input in memory

Steven

User loads drawing instruction file (coordinates/vectors) to system through command line interface on PC◦ Additional commands used to open/close shutter,

adjust component settings Output displayed on PC monitor using CMOS

camera software

Steven

Blake

Blake

*Provided by EXPOBlake

Blake

Availability/lead time of galvanometer, laser, microcontroller, etc…◦ Prepare list of back-up components

Galvanometer speed inconsistent, unreliable◦ Compensate with real-time system calibration in

software Loss of calibration over time

◦ Mechanically isolate optical system to prevent ambient vibrations from interfering with calibration

Matt

Unfamiliar with microcontrollers, servo driver◦ Adjust schedule as necessary to increase time

spent on microcontroller programming/interfacing Work time lost due to unforeseen

circumstances◦ Schedule ambitious deadlines to allow for lost

work time Damaged/nonfunctional components

◦ Test components when they arrive to guarantee they work correctly

Matt

When all else fails:

Blame Trevor

Matt