Variable optical filter

Details Variable optical filter Variable optical filter

2006-05-23

2006-05-23

Mack, Ricky L. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S280000

Reexamination Certificate

active

07050216

ABSTRACT:
A variable optical filter comprises a first polarizer, a first phase difference element operable to generate a phase difference, a variable Faraday rotator operable to impart a variable Faraday rotation, a second phase difference element operable to generate a phase difference, and a second polarizer, wherein said polarizers, said variable Faraday rotator, and said phase difference elements are arranged in the mentioned order along the optical axis, and wherein when the angles formed by the optic axes of said first and second phase difference elements and the transmitted polarization azimuth of the first polarizer are assumed respectively to be φ1and φ2, these φ1and φ2are set to different angles.

REFERENCES:
patent: 6826318 (2004-11-01), Nagaeda et al.
patent: 6-130339 (1994-05-01), None
International Search Report—PCT/JP03/07279; ISA/JPO; Mailed: Aug. 19, 2003.

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