Photoelectric joystick

Details Photoelectric joystick Photoelectric joystick

1978-10-06

1981-02-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250211K, G01V 904

Patent

active

042503787

ABSTRACT:
A device and method for producing a digital signal representative of the position of a moveable control stick relative to one or more reference planes. The device includes means for detecting the location of a shadow cast by a portion of the control stick extending between one or more light-emitting elements and one or more light-sensitive elements, and means for generating a digital signal representative of the detected location. With the light-emitting or light-sensitive elements oriented in a planar array, the signal thus generated is representative of the position of the control stick relative to the plane of the array.

REFERENCES:
patent: 3478220 (1969-11-01), Milroy
patent: 3764813 (1973-10-01), Clement et al.
patent: 3787837 (1974-01-01), Allen et al.
patent: 3811047 (1974-05-01), Shragal
patent: 3856127 (1974-12-01), Halfon et al.
patent: 4092532 (1978-05-01), Hayes

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