Coordinate detecting apparatus for optical projectors

Details Coordinate detecting apparatus for optical projectors Coordinate detecting apparatus for optical projectors

1974-08-27

1976-06-29

Corbin, John K.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

356170, 250233, G01B 908

Patent

active

039663310

ABSTRACT:
A coordinate detecting apparatus for detecting a coordinate position on a screen of an optical projector. The coordinate detecting apparatus includes coding means for spacially modulating, when actuated, a picture image on the screen of the optical projector; actuating means for actuating the coding means; detecting means for detecting the modulated signal produced on the screen; and circuit means responsive to the modulated signal, which is detected by the detecting means, for detecting the position of the detecting means on a coordinate with respect to the picture image on the screen to produce a coordinate signal.

REFERENCES:
patent: 2997699 (1961-08-01), Lovell
patent: 3291991 (1966-12-01), Welti
patent: 3617134 (1971-11-01), Frush et al.

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