Finger over the lens detecting apparatus

Details Finger over the lens detecting apparatus Finger over the lens detecting apparatus

1984-02-03

1985-10-15

Adams, Russell E.

3542891, G03B 1738

Patent

active

045470545

ABSTRACT:
In a photographic camera, a finger pressure sensitive member extends substantially around the optical path of a taking lens. The pressure sensitive member is supported for movement to a plurality of positions in response to finger pressure at respective locations around the optical path. If a finger is inadvertently placed over the taking lens at any angle, it will move the pressure sensitive member to a corresponding one of the positions. A sensing device extends around the optical path in a manner similar to that of the pressure sensitive member for sensing movement of the member to each of its positions. An indicator connected to the sensing device alerts the camera user before the user takes a picture that a finger may be blocking the taking lens, whenever the sensing device senses movement of the pressure sensitive member to any one of its positions.

REFERENCES:
patent: 3878548 (1975-04-01), Ettischer
patent: 4130358 (1978-12-01), Lang et al.
patent: 4324472 (1982-04-01), Terada et al.

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