Large area, low capacitance photodiode and range finder device u

Details Large area, low capacitance photodiode and range finder device u Large area, low capacitance photodiode and range finder device u

1985-11-12

1989-05-02

Adams, Russell E.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354403, G01C 300, G03B 300

Patent

active

048263125

ABSTRACT:
An infrared sensitive photodiode having a relatively large optically active area and relatively low capacitance comprises a stripe diode adjacent an optically active area having a thick infrared transparent field oxide over a lightly doped channel stop. The low capacitance photodiode is particularly useful in a range finder device of the type having means for projecting a beam of light to illuminate a spot on an object in a scene, and a linear array of photosensors for detecting the apparent location of the spot in the scene to determine the distance to the object. An improved range finder of this type has an infrared LED with a long narrow beam cross section and an array of stripe photodiodes having shapes similar to the shape of the beam cross section.

REFERENCES:
patent: 3771149 (1973-11-01), Collins et al.
patent: 4490036 (1984-12-01), Anagnostopoulos
patent: 4490037 (1984-12-01), Anagnostopoulos et al.
patent: 4521106 (1985-06-01), Lambeth

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