Porro Prism

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Double Porro prism systems are used in small optical telescopes to re-orient an inverted image, and especially in many binoculars where they both erect the image and provide a longer, folded distance between the objective lenses and the eyepieces.

Keywords

binoculars, optics, geometric glass prism, total internal reflection, astronomical telescope, image rotate

Galleries

Lenses and Refraction

Source

Lieutenant Colonel William E. Persons, Infantry Major Oliver S. Wood, Infantry Major Joseph Plassmeyer, Cavalry Captain Paul V. Kellogg and , Infantry First Lieutenant John E.McCammon Military Science and Tactics (, MO: The University Co-operative Store, 1922)

Downloads

TIFF (full resolution)

2400×984, 165.2 KiB

Large GIF

1024×419, 23.3 KiB

Medium GIF

640×262, 13.5 KiB

Small GIF

320×131, 5.6 KiB