In-finder indicator for single-lens reflex camera

Details In-finder indicator for single-lens reflex camera In-finder indicator for single-lens reflex camera

2005-05-16

2008-10-07

Perkey, W. B. (Department: 2862)

Photography

With exposure objective focusing means, focusing aid, or...

Having indicator

C396S296000, C396S386000

Reexamination Certificate

active

07433587

ABSTRACT:
An in-finder indicator for a single-lens reflex camera comprises an eyepiece lens, a reflecting mirror for reflecting a beam of light from a subject, a screen having a screen surface which is subjected to surface treatment to form prisms for presenting a superimposed indication and which forms an image of the subject based on the light beam reflected by the reflecting mirror, a dach mirror having a pair of mirror surfaces for reflecting the light beam from the screen, a reflecting surface for reflecting the light beam reflected by the dach mirror surfaces and introducing the light beam to the eyepiece lens, and an illumination member disposed in a laterally-offset space between the dach mirror surfaces and the screen and introducing an illumination beam to enter the screen surface laterally of the image formed on the screen surface.

REFERENCES:
patent: 3603200 (1971-09-01), Hiruma
patent: 4367463 (1983-01-01), Suzuki et al.
patent: 5734428 (1998-03-01), Suda et al.
patent: 08-043913 (1996-02-01), None
patent: 2001-075149 (2001-03-01), None
patent: 2002-268128 (2002-09-01), None

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