In-finder display device

Details In-finder display device In-finder display device

2007-10-09

2007-10-09

Perkey, W. B. (Department: 2862)

Photography

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

Having indicator

C396S296000

Reexamination Certificate

active

11109328

ABSTRACT:
An in-finder display device includes an optical member having prisms and disposed about a position where an objective unit forms an image; an image-inverting unit receiving light from the optical member; an eyepiece unit for guiding the light from the image-inverting unit to an observer; a light source; and an illuminating unit for guiding light from the light source to the prisms. Each of the prisms in the optical member has two prism facets forming a ridgeline nonparallel to a plane orthogonal to an optical axis of the objective unit. Light from the light source is reflected off the prisms, passes through the image-inverting unit, and is guided by the eyepiece unit to the observer.

REFERENCES:
patent: 4367463 (1983-01-01), Suzuki et al.
patent: 5235380 (1993-08-01), Yamada et al.
patent: 6714244 (2004-03-01), Takebayashi et al.
patent: 7039310 (2006-05-01), Haraguchi et al.
patent: 7046295 (2006-05-01), Hovanky
patent: 8-43913 (1996-02-01), None

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