Blur detecting device

Details Blur detecting device Blur detecting device

1983-10-27

1986-04-29

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340683, 3542891, 354465, 354476, G08B 2100

Patent

active

045860297

ABSTRACT:
A blur detecting device comprises a plurality of photo-electric converter elements which are arranged in different positions to receive light from an object and to convert quantities of light received into quantities of electricity. Electric charge storing elements are included which store the quantities of electricity obtained from the photo-electric converter elements. A computing circuit in the blur detecting device obtains the ratio of the quantities of electricity stored at the electric charge storing elements. An indicating circuit compares signals produced from the computing circuit at different lengths of light receiving time and indicates a blurred state of the light received from the object.

REFERENCES:
patent: 4273430 (1981-06-01), Fritsche et al.
patent: 4502771 (1985-03-01), Katsuma et al.

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