Device for detecting position and intensity of light and positio

Details Device for detecting position and intensity of light and positio Device for detecting position and intensity of light and positio

1992-02-25

1994-06-28

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

257458, H01J 4014

Patent

active

053249291

ABSTRACT:
A device for detecting direction, height and intensity of a light which facilitates detection and provides high accuracy. The device includes a glass substrate, on which a resistant layer for detecting the X coordinate position, a photoconductive layer utilizing the photoconducting effect of a photoelectric converting layer, and a resistant layer of metallic electrode resistor body for detecting the Y coordinate position, laminated in order. The resistant layers are provided respective two lead electrodes X, X' and Y, Y'. By applying 5V and 0V, for example, to X and X', a voltage Vx corresponding to the position where the light is irradiated can be directly obtained through Y or Y'. Namely, the X coordinate position of the point where the light passes can be easily and accurately detected. By applying +5V and 0V for Y and Y', Y coordinate of the light irradiated point can be obtained, and by applying the same potential to X and X', light intensity can be obtained.

REFERENCES:
patent: 3875402 (1975-04-01), Parkin
patent: 4874939 (1989-10-01), Nishimoto et al.
patent: 4887140 (1989-12-01), Wang
patent: 4961096 (1990-10-01), Idesawa
patent: 5126815 (1992-06-01), Murakami et al.

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