Optical cursor tracking correction system

Details Optical cursor tracking correction system Optical cursor tracking correction system

1977-03-30

1978-09-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

318577, G05B 100

Patent

active

041140346

ABSTRACT:
Linear photosensitive array rotatably mounted in a digitizing cursor and maintained in an orthogonal relationship with the function (such as a curve or the like) to be digitized. As the cursor is moved along the function, the photosensitive array is maintained at right angles to the direction of the cursor movement. Circuits are provided to sense any difference in position between an indicium in the cursor and the function being traced, to obtain correction values to be applied to the digitized coordinates of the cursor position.

REFERENCES:
patent: 3135904 (1964-06-01), Purkhiser
patent: 3502880 (1970-03-01), Martinek et al.
patent: 3670153 (1972-06-01), Rempert et al.
patent: 3774098 (1973-11-01), Moss

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