Optics: measuring and testing – By light interference – Having partially reflecting plates in series
Reexamination Certificate
2005-12-20
2005-12-20
Turner, Samuel A. (Department: 2877)
Optics: measuring and testing
By light interference
Having partially reflecting plates in series
Reexamination Certificate
active
06977731
ABSTRACT:
A method and an apparatus for enhancing a resolving power of a tunable optical filter. An optical input is applied to the tunable filter. An electrical signal is applied to the tunable optical filter. The electrical signal has a first component that has a first frequency and a second component that has a second frequency. The second frequency is higher than the first frequency. An optical output of the tunable optical filter is applied to a photodetector. The electrical output from the photodetector is applied to a lock-in detector. The lock-in detector receives an input from frequency doubling circuitry. An output of the lock-in detector is monitored.
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Chu Kwang Uk
Lee Chang-Hee
Connolly Patrick
Novera Optics, Inc.
Turner Samuel A.
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