Device for detecting spatial variation in the intensity of elect

Details Device for detecting spatial variation in the intensity of elect Device for detecting spatial variation in the intensity of elect

1988-07-14

1990-04-10

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

2505781, 357 24, 357 30, H01L 2714, H01L 3106

Patent

active

049163060

ABSTRACT:
A device for detecting spatial variation in the intensity of electromagnetic radiation in a given spectral region comprises a body of semiconductor material that responds to electromagnetic radiation in the given spectral region by generating charge carriers. The body of semiconductor material has first and second charge collection regions separated by a barrier region that forms a potential barrier to the charge carriers in the charge collection regions. The device also comprises an electrode structure for establishing a predetermined potential in the charge collection regions, whereby charge carriers can be accumulated in the charge collection regions, and first and second output devices connected to the first and second charge collection regions respectively for extracting charge therefrom.

REFERENCES:
patent: 4241358 (1980-12-01), Wade
patent: 4389661 (1983-06-01), Yamada
patent: 4796072 (1989-01-01), Higashi et al.

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