Optical linear and rotation displacement sensor

Details Optical linear and rotation displacement sensor Optical linear and rotation displacement sensor

2011-05-31

2011-05-31

Connolly, Patrick J (Department: 2877)

Optics: measuring and testing

By light interference

For dimensional measurement

Reexamination Certificate

active

07952721

ABSTRACT:
A system includes a measuring tool, a fixture, and a rotatable target. The measuring tool includes a light source, an imaging device, and an electronic circuit. The fixture allows the rotatable target to rotate about an axis. The rotatable target includes a surface having microscopic asperities. The imaging device is mounted to provide a sequence of images derived from said microscopic asperities. The electronic circuit is connected to the imaging device for measuring rotation of the rotatable target from the sequence of images.

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