Title: Photoelectric transducing unit and system for detecting the sharpness of the image of object by means of the unit

Abstract: One bifilarly deposited photosensitive strip provided with electrodes on the ends, and a second bifilarly deposited photosensitive strip, contacted along its long edges by two electrodes, are disposed on opposite side of a transparent spacer to form a focusing indicator. When one or more indicators are mounted at suitable locations in an optical system, suitable circuit means respond to the electrical output at the electrodes and respond to the optical system position. Indication may be accomplished by responding to the circuit means.

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Inventors: Schulz, Hansrichard

Application Number: 545473
Filing Date: 1975-01-30
Publication_date: 1977-04-19
Assignee:
Primary Class(es): 250/214.1 250/201.7, 257/E31.053, 396/111, 396/147
Other Classes:
US Patent Ref:

3830571	Aug, 1974	Imai et al.	250/201.
3838275	Sep, 1974	Stauffer	250/204.
3857031	Dec, 1974	Sinclair et al.	250/201.
3875401	Apr, 1975	Stauffer	354/195.

Other Refs:
Primary Examiner: Nelms, David C.
Assistant Examiner:
Attorney: