Sensor

Details Sensor Sensor

2005-09-20

2005-09-20

Porta, David (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231140, C250S226000, C250S578100, C356S419000, C356S420000

Reexamination Certificate

active

06946650

ABSTRACT:
The relative position of two members is determined based upon a detected relative intensities of first and second colors of light. The intensity balance associated with relative occlusion of first and second color filter portions on one member by a mask on the other member. An exemplary use is in rotational position sensing within a limited rotation range. With a given compliance between the two members, the position sensing can be used as a proxy for torque sensing.

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