1 / 20

Optical Instruments

Optical Instruments. Camera Loupe Telescope (terrestrial and astronomical) Microscope. Camera. f-number. f/# = f’/D f/1 f/1.4 f/2 f/2.8 f/4 f/5.6 f/8 f/11 f/16 f/22 f/32 large aperture small aperture

tarika
Download Presentation

Optical Instruments

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Optical Instruments Camera Loupe Telescope (terrestrial and astronomical) Microscope

  2. Camera

  3. f-number f/# = f’/D f/1 f/1.4 f/2 f/2.8 f/4 f/5.6 f/8 f/11 f/16 f/22 f/32 large aperture small aperture Amount of light entering is inversely proportional to the square of the f/# 1, 1.96, 4, 7.84, 16, 31.4, 64, 121, 256, 484, 1024

  4. Angular vs linear magnification

  5. MT = fE’/fV’

  6. Aperture vs Depth of field

  7. Depth of field vs Depth of focus

  8. Hyperfocal distance

  9. Simple Magnifiers M= ( qL )/ (1 – dL’) q (nearpoint) (-25 cm)

  10. Two special cases: If at infinity M=F/4 (nominal magnification) At “position of distinct vision” M= 1 + (F/4) (maximum angular magnifcation)

  11. Huygens eyepiece

  12. Ramsden eyepiece

  13. Other Types Kellner (achomatized Ramsden) Achromatic doublet for eye lens RKE similar to a Kellner but wider field of view

  14. Abbe or orthoscopic 4 elements (most widely used in quality instruments) Erfle 5 element-Military

  15. Microscope M = -gFoFe/4

  16. Kepler (astronomical) telescope

  17. M = - f’o/f’e = - Fe/Fo d = f’o + /fe/ = f’o + f’e

  18. Galilean telescope

  19. M = - f’o/f’e = - Fe/Fo d = f’o - /f’e/ = f’o + f’e

More Related