chapter 2: basic optics
DESCRIPTION
Chapter 2: Basic Optics. The electromagnetic spectrum. The electromagnetic spectrum. The attenuation of solar radiation by the atmosphere for wavelenghs visible to the naked human eye. The attenuation curve for optical fiber (glass). Note the five optical wavelenght windows. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/1.jpg)
Chapter 2: Basic Optics
The electromagnetic spectrum
The electromagnetic spectrum
![Page 2: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/2.jpg)
The attenuation of solar radiation by the atmosphere for wavelenghs visible to the naked human eye.
![Page 3: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/3.jpg)
The attenuation curve for optical fiber (glass). Note the five optical wavelenght windows.
![Page 4: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/4.jpg)
Geometrical optics
Light disperses in straight lines from its source. Wavefronts are formed at right angles to the rays of light, and the light diminishes in proportion to the square of the distance.
![Page 5: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/5.jpg)
Reflection
Reflection on a plane surface.
![Page 6: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/6.jpg)
Refraction
Refraction of a light ray passing through an optically denser medium.
![Page 7: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/7.jpg)
Refraction through a lens
The path, imaging and refraction of light through a biconvex lens.
![Page 8: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/8.jpg)
Total reflection
When light travels from an optically denser to an optically less dense medium, and the angle of incidence exceeds a certain critical value, total reflection of the light occurs.
![Page 9: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/9.jpg)
Reflection of light at 90° angle of incidence Fresnel’s laws of reflection
Polarized light
Light consists of two fields: an electrical and a magnetic field. The two fields are synchronous with field vectors that maintain a 90° phase difference to one another.
![Page 10: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/10.jpg)
Light hitting a surface will be polarized, and the electric and magnetic fields are polarized differently.
![Page 11: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/11.jpg)
Graphs showing the differences in reflectance of the different polarizations.
![Page 12: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/12.jpg)
Total reflection in a fiber
The refraction of light entering the fiber, and total reflection within the fiber.
![Page 13: Chapter 2: Basic Optics](https://reader036.vdocuments.net/reader036/viewer/2022062222/5681679e550346895ddce4c0/html5/thumbnails/13.jpg)
Rayleigh scattering and Tyndall’s light
Rayleigh scattering of light due to impurities in the light transmitting.