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US 11,448,529 B2Granted
Optical rotary encoder
AssigneeNational Chung Hsing University
InventorHsi-Fu Shih
Life of this patent
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Abstract
An optical rotary encoder includes a code disk, a laser source unit, a focusing unit and a photodetector array. The focusing unit converts the laser beam emitted by the laser source unit into incident laser beams that have a plurality of light points respectively on code tracks of the code disk, such that the code disk modulates the incident laser beams to form optical code signals. The photodetector array receives and converts the optical code signals into electric code signals.
Claims12
An optical rotary encoder, comprising:
- a code disk including a plurality of code tracks that are concentric;
- a laser source unit configured to emit a source laser beam;
- a focusing unit disposed to receive the source laser beam, and configured to convert the source laser beam into incident laser beams that have a plurality of light points respectively on said code tracks of said code disk, such that said code disk modulates the incident laser beams to form optical code signals, the optical code signals composed of a plurality of optical code components that respectively correspond to the incident laser beams;
- and
- a photodetector array including a plurality of photodetectors that are disposed to receive the optical code signals, that respectively correspond to the optical code components, and that are configured to convert the optical code signals into electric code signals.
2 more elements
Dependencies are inferred from the claim text.