Reflecting prism and a finder system having a reflecting prism

Details Reflecting prism and a finder system having a reflecting prism Reflecting prism and a finder system having a reflecting prism

1994-12-15

1997-09-16

Dzierzynski, Paul M.

Optical: systems and elements

Prism

With reflecting surface

359831, 359834, 359613, 359629, 359636, 359640, 359580, 359583, 396 89, 396385, G02B 504, G02B 2700, G02B 2714, G02B 110

Patent

active

056686749

ABSTRACT:
A double Porro prism having an incident surface, an exit surface, and a plurality of reflecting surfaces for internally reflecting light rays from the incident surface to the exit surface. The plurality of reflecting surfaces having a final reflecting surface that is positioned near the exit surface. The double Porro prism also has a ghost preventing surface that is formed between a ridge of the final reflecting surface and a ridge of the exit surface.

REFERENCES:
patent: 4109263 (1978-08-01), Johnson
patent: 4119980 (1978-10-01), Baker
patent: 5095326 (1992-03-01), Nozaki et al.
patent: 5233381 (1993-08-01), Abe
patent: 5235460 (1993-08-01), Abe
patent: 5276552 (1994-01-01), Kohmoto et al.
patent: 5491528 (1996-02-01), Takato et al.

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