Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-08-17
1996-01-09
Sikes, William L.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2502034, 2502036, 2502061, 2502062, G01B 1126
Patent
active
054830605
ABSTRACT:
In an optical position sensor capable of detecting a direction of incidence of light and intensity, this invention contemplates to make the sensor compact by reducing the number of pixels constituting light reception sensors and reducing the light reception area. To accomplish this object, a detection element portion 10 comprises a glass substrate 22, a light shading film 24 formed on a surface of the glass substrate 22 and having mutually criss-crossing slits 24a, 24b and a light reception portion 26 fixed to the back of the glass substrate 22. Unidimensional photo-diode arrays 26X, 26Y for receiving the slit beams passing through the slits 24a, 24b respectively, and a signal processing circuit 28 for scanning the photo-diode arrays 26X, 26Y and taking out light reception signals are disposed in the light reception portion 26.
REFERENCES:
patent: 3478219 (1969-11-01), Nutz
patent: 4018532 (1977-04-01), Fletcher et al.
patent: 4857721 (1989-08-01), Dunavan et al.
patent: 4874937 (1989-10-01), Okamoto
patent: 5117744 (1992-06-01), Zimmer et al.
Miwa Katsuteru
Sugiura Wataru
Abraham Fetsum
Nippondenso Co. Ltd.
Sikes William L.
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