Optics: motion pictures – Removable film strip magazine type
Patent
1977-04-21
1978-10-31
Adams, Russell E.
Optics: motion pictures
Removable film strip magazine type
352140, 250201, G03B 1318
Patent
active
041237650
ABSTRACT:
Disclosed is an improvement in an automatic focusing system for use with an optical instrument having a focusable objective which is adjustable in response to optical and electrical components of the system determining object distance of a remote subject by comparing images of scanning and reference optical systems. The scanner of the optical system is driven oscillatably across an angle to detect a subject between infinity and the minimum focus condition of the objective lens. The scanner is adjustable in response to the focus condition of the lens whereby the bisector of the angle is aligned with the subject.
REFERENCES:
patent: 3958117 (1976-05-01), Stauffer
patent: 4021821 (1977-05-01), Peterson
patent: 4059756 (1977-11-01), Wilwerding
patent: 4059757 (1977-11-01), Wilwerding
patent: 4059758 (1977-11-01), Wilwerding
Adams Russell E.
Nihon Beru-Haueru Kabushiki Kaisha
Passman Aaron
Peele, Jr. John E.
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