Intensity-based optical encoder using digital diffractive...

Details Intensity-based optical encoder using digital diffractive... Intensity-based optical encoder using digital diffractive...

2009-01-02

2011-10-25

Epps, Georgia Y (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231170, C250S231180, C341S013000

Reexamination Certificate

active

08044339

ABSTRACT:
An optical encoder and method for measuring displacement information using an optical encoder uses an encoder member with multiple digital diffractive optic regions to optically diffract an incident beam of light to produce output beams of light having intensity distribution patterns, which are used to generate electrical signals that provide relative displacement information of the encoder member.

REFERENCES:
patent: 4956553 (1990-09-01), Matsui
patent: 7595480 (2009-09-01), Kress

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