Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-12-27
1992-05-26
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2502221, 250561, G01V 904
Patent
active
051171007
ABSTRACT:
The present optical position detection method and the apparatus therefor is adapted to compute an arithmetic mean of the adjusted light reception values received by adjacent photodetectors as the virtual light reception value at the virtual position, compare not only the adjusted light reception values of the respective photodetectors but also the virtual light reception values with the reference level and utilize the virtual position also as the light interruption position data when light interruption is determined, thus enhancing the accuracy of detecting the position of an object.
REFERENCES:
patent: 4559452 (1985-12-01), Igaki et al.
patent: 4566337 (1986-01-01), Smart
patent: 4645920 (1987-02-01), Carroll et al.
patent: 4652741 (1987-03-01), Golborne
patent: 5051574 (1991-09-01), Yoshida et al.
Asano Hiroshi
Fujimoto Isamu
Hosaka Toru
Matsuoka Kenichi
Nagasaki Kojyu
Dowa Mining Co. Ltd.
Messinger Michael
Nelms David C.
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