Viewfinder for camera

Details Viewfinder for camera Viewfinder for camera

1990-07-25

1992-11-03

Gellner, Michael L.

354222, G03B 1312, G03B 1314

Patent

active

051609541

ABSTRACT:
A viewfinder is provided for being mounted on a camera containing a photographing lens which is based from the optical axis of the viewfinder. A parallax correcting prism insertable into and extractable from the axis of the viewfinder as provided. The camera is arranged such that the space occupied by the parallax-correcting prism is minimized so as to allow design freedom for the camera. The viewfinder is also designed to decrease the difference in the diopter and the fuzziness of the image between normal photographing mode and a macro photographing mode. A driving mechanism is provided to move the prism in a direction substantially normal to the axis of a viewfinder lens system in order to insert it and remove it from the optical axis of the viewfinder. According to a further feature of the invention, the prism can include a curved surface having a magnifying power.

REFERENCES:
patent: 3836934 (1974-09-01), Suzuki et al.
patent: 4164369 (1979-08-01), Urano et al.
patent: 4219264 (1980-08-01), Rodeck
patent: 4924247 (1990-05-01), Suzuki et al.
patent: 4944030 (1990-07-01), Haraguchi et al.
patent: 4967219 (1990-10-01), Morisawa et al.
French Search Report and Annex, FR 9009508, Oct. 28, 1991.
"Parallax Correction" (Ruben), Research Disclosure, vol. 2244, No. 249, p. 57, Jan., 1985.
Copy of the United Kingdom Search Report, Application No. 9016367.6, Aug. 30, 1990.

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