Apparatus and method for improving resolution of optical...

Details Apparatus and method for improving resolution of optical... Apparatus and method for improving resolution of optical...

2007-03-20

2007-03-20

Young, Brian (Department: 2819)

Coded data generation or conversion

Digital pattern reading type converter

Optical

Reexamination Certificate

active

11254453

ABSTRACT:
The invention provides an interpolation apparatus for improving the resolution of an optical encoder. The optical encoder outputs an encoding signal, and the encoding signal corresponds to a first resolution. The interpolation apparatus comprises a comparing circuit and a lookup table circuit. The comparator receives the encoding signal and produces a plurality of comparison signals. The lookup table circuit receives a plurality of comparison signals and produces an outputted signal, wherein the outputted signal corresponds to second resolution. The second resolution is greater than the first resolution.

REFERENCES:
patent: 5506579 (1996-04-01), Spaulding
patent: 6355972 (2002-03-01), Snyder
patent: 6963064 (2005-11-01), Updegrave

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