Laser framefinder

Details Laser framefinder Laser framefinder

1990-05-21

1991-10-22

Hayes, Monroe H.

Optics: motion pictures

Combined with diverse-type device

352171, 352 4, 352 3, 352 48, G03B 2900

Patent

active

050590197

ABSTRACT:
The element of the laser framefinder comprise a laser beam generator, a shutter for pulsing a beam of laser light, a laser beam scanner, coupling elements joining a laser beam generator with a laser beam scanner, elements for manipulating a scanning device to produce a laser light pattern, a camera including elements for coupling a scanning device to a camera body, projecting device for aligning a laser light pattern with an optical axis of a camera, a device for optically transmitting a laser light pattern from the scanner to one projecting device, elements creating optical transparency to laser light in a substantially planar ground glass element used as the focusing element of a reflex viewing system, a feedback network utilizing a sensing element to couple laser beam pulsation with a positioning of an optical element of a scanning device, a feedback network utilizing a sensing device to couple a laser beam pulsation with a positioning of a projecting apparatus.

REFERENCES:
patent: 2816475 (1957-12-01), Waller et al.
patent: 4516159 (1985-05-01), Diepeveen
patent: 4714321 (1987-12-01), Sillitto
patent: 4837633 (1989-06-01), Parra

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