Photo-sensing circuit

Details Photo-sensing circuit Photo-sensing circuit

1975-12-03

1978-06-13

Hix, L. T.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354 43, 354 50, 356222, G03B 708, G01J 142

Patent

active

040952410

ABSTRACT:
The photo-sensing circuit of the present invention has output characteristics which are linear for a wider range than that of a conventional photo-sensing circuit. In this invention the amount of incident light of the photographing field which is to be sensed is converted to an electric signal by a photo-electromotive element. A photo-conductive element, having its resistance value varied corresponding to the amount of incident light from the photographing field which is sensed, is connected as a load resistance to the above mentioned photo-electromotive element. Therefore the saturation level of the output characteristics of said photo-electromotive element varies corresponding to the amount of incident light into the photo-conductive element.

REFERENCES:
patent: 3781119 (1973-12-01), Mori
patent: 3850530 (1974-11-01), Uno et al.
patent: 3852774 (1974-12-01), Taguchi et al.

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