Single-lens reflex type viewfinder and method of adjusting the s

Details Single-lens reflex type viewfinder and method of adjusting the s Single-lens reflex type viewfinder and method of adjusting the s

1981-12-15

1984-02-21

Mathews, A. A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

354225, 358224, 350561, G03B 1912

Patent

active

044326262

ABSTRACT:
A single-lens reflex type viewfinder as for VTR cameras has a prism for deflecting a portion of light coming through a main camera lens along a first optical axis to pass through a viewfinder master lens along a second optical axis normal to the first optical axis, and a mirror for reflecting the deflected light portion toward a viewfinder eyepiece along a third optical axis normal to the second optical axis and parallel to the first optical axis. The mirror is disposed on an image formation point of the viewfinder master lens to keep viewfinder and picked-up camera images in agreement with each other and hence to eliminate viewfinder adjustment. To remove any deviation of the viewfinder image from the third optical axis and eliminate any inclination of the viewfinder image, the mirror and/or prism is angularly movable about the first axis, the second axis, and/or the third axis.

REFERENCES:
patent: 3833758 (1974-09-01), Ferrari
patent: 3914034 (1975-10-01), Komine
patent: 4330797 (1982-05-01), Yokokawa et al.

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