Optical linear and rotation displacement sensor
First Claim
1. A system, comprising a measuring tool, a fixture, and a rotatable target, wherein said measuring tool includes a light source, an imaging device, and an electronic circuit, wherein said fixture allows said rotatable target to rotate about an axis, wherein said rotatable target includes a surface having microscopic asperities, wherein said imaging device is mounted to provide a sequence of images derived from said microscopic asperities, wherein said electronic circuit is connected to said imaging device for measuring rotation of said rotatable target from said sequence of images.
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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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Citations
54 Claims
- 1. A system, comprising a measuring tool, a fixture, and a rotatable target, wherein said measuring tool includes a light source, an imaging device, and an electronic circuit, wherein said fixture allows said rotatable target to rotate about an axis, wherein said rotatable target includes a surface having microscopic asperities, wherein said imaging device is mounted to provide a sequence of images derived from said microscopic asperities, wherein said electronic circuit is connected to said imaging device for measuring rotation of said rotatable target from said sequence of images.
- 33. A system, comprising a measuring tool, a first fixture, a moveable target, and a first axis, wherein said measuring tool includes a light source, an imaging device, and an electronic circuit, wherein said first fixture constrains said moveable target to at least one from the group consisting of translation along said first axis and rotation about said first axis, wherein said moveable target includes a surface having microscopic asperities, wherein said imaging device is mounted to provide a sequence of images derived from said microscopic asperities, wherein said electronic circuit is connected to said imaging device for measuring movement of said moveable target from said sequence of images.
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46. A system, comprising an elongate member and a measuring tool, wherein said measuring tool includes a light source, an imaging device, and an electronic circuit, wherein said elongate member has a surface, wherein said imaging device is mounted to image said surface, wherein said measuring tool measures at least one from the group consisting of translation and rotation of said elongate member from said images of said surface.
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54. A system, comprising at least one fixture, a plurality of measuring tools and a plurality of moveable targets, wherein each said measuring tool includes a light source and an imaging device, wherein each said moveable target includes a surface having microscopic asperities, wherein each said imaging device is mounted to provide a sequence of images derived from said microscopic asperities, wherein said at least one fixture constrains movement of said moveable targets relative to said imaging devices for measuring movements of said moveable targets from said sequences of images.
Specification