Camera with a holographic indicator

Details Camera with a holographic indicator Camera with a holographic indicator

1979-07-25

1981-03-10

Miller, Jr., George H.

350 385, 354289, G03B 1720, G03B 1302, G03H 122

Patent

active

042550327

ABSTRACT:
A camera having a holographic indicator in which a focused image hologram is held on an image plane of the view finder of the camera and a light source is arranged to illuminate the hologram in such a direction that the light transmitted through the hologram goes out of the path of the view finder. The hologram may be also a relief type blazed hologram which has a transmitting factor (zero-order diffraction factor) higher than 90% for the light from an object and which makes the light from the reconstructed image of the hologram pass through the path of the view finder. This hologram indicator never affects the object's image when the hologram is not illuminated.

REFERENCES:
patent: 3560921 (1971-02-01), Lopez
patent: 3633988 (1972-01-01), Farrar
patent: 3680945 (1972-08-01), Sheridon
patent: 4165930 (1979-08-01), Matsumoto et al.

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