Adjustably lighted reference photocell circuit arrangement...

Details Adjustably lighted reference photocell circuit arrangement... Adjustably lighted reference photocell circuit arrangement...

G - Physics

06

K

354/66, 354/77

G06K 7/14 (2006.01) G01D 5/36 (2006.01)

Patent

CA 1116302

47,688 AN ADJUSTABLY LIGHTED REFERENCE PHOTOCELL CIRCUIT ARRANGEMENT FOR A PHOTOCELL SENSING ASSEMBLY ABSTRACT OF THE DISCLOSURE A photocell sensing assembly for an optoelectronic encoder includes an adjustably lighted reference photocell arrangement for providing a variable predetermined reference output value. An adjustable shutter assembly regulates light entensities in the arrangement. The reference output value is established relative to individual outputs of a plurality of encoding photocells to be sampled by a detecting circuit.

322618

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