Indicator in a finder

Details Indicator in a finder Indicator in a finder

1976-05-24

1978-08-08

Griffin, Donald A.

G03B 1912

Patent

active

041060385

ABSTRACT:
In the disclosed single lens reflex camera a focusing screen presents exposure information in addition to an image of the scene to be photographed. The image area of the screen is surrounded by walls protruding upward from and integral with the screen to prevent dust from entering the image area and to space the viewfinder lens from the screen in a dust tight manner along all or most of the periphery. Also disclosed is a pointer in a second area adjacent to one wall outside the image area which indicates information on a scale or a sliding plate.
A fresnel lens, angled edge, or other means formed on the upper and/or lower side of the screen directs light to both the image area and the second area.

REFERENCES:
patent: 2915935 (1959-12-01), Pabst et al.
patent: 3498198 (1970-03-01), Fujii
patent: 3590703 (1971-07-01), Ono
patent: 3630134 (1971-12-01), Nakamura
patent: 3728951 (1973-04-01), Kondo
patent: 3754813 (1973-08-01), Depalma et al.
patent: 3760700 (1973-09-01), Trankner et al.

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