Photographic camera with labyrinth light-trap for deployable len

Details Photographic camera with labyrinth light-trap for deployable len Photographic camera with labyrinth light-trap for deployable len

1992-07-06

1993-08-31

Hayes, Monroe H.

354202, G03B 1702

Patent

active

052413381

ABSTRACT:
A photographic camera comprises a camera body having a front opening, a lens holder, and mounting means located inside the camera body for supporting the lens holder to move the lens holder through the front opening into and out of the camera body. The mounting means cooperates with the lens holder to form a single labyrinth which prevents ambient light that may enter the front opening substantially from reaching a film plane inside the camera body. According to the invention, covering means is arranged in surrounding relationship with the lens holder and extends through the front opening for cooperating with the lens holder to form a second labyrinth that augments the single labyrinth to further prevent ambient light from reaching the film plane.

REFERENCES:
patent: 4721972 (1988-01-01), Wakabayashi
patent: 4961085 (1990-10-01), Cho et al.

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