Scale and readhead apparatus

Details Scale and readhead apparatus Scale and readhead apparatus

2005-06-21

2009-06-23

Lee, John R (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231160

Reexamination Certificate

active

07550710

ABSTRACT:
Apparatus for determining angular alignment of a readhead with respect to a scale. The apparatus comprises a scale and readhead. The readhead has at least one sensor which produces an output which is dependent on the angular alignment of the readhead relative to the scale.

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