Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1989-05-31
1990-07-31
Arnold, Bruce Y.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
250225, 350166, 350404, G02B 530, G02B 528
Patent
active
049445790
ABSTRACT:
A system for detecting and analyzing polarized radiation having a circular polarization component while utilizing radiation filter structures having combined wavelength and polarization sensitive characteristics. The system includes a radiation filter which comprises a plurality of different wavelength .lambda.1 to .lambda.n interference filter coatings applied to a filter substrate as a plurality of parallel adjacent stripes, such that different wavelengths .lambda.1 to .lambda.n are passed by the different stripes. Moreover, a plurality of different polarization filters of either parallel polarization or perpendicular polarization, are also applied as a plurality of parallel adjacent stripes to the different areas of the filter substrate. The arrangement includes first, second, third and fourth interference filter stripes for each wavelength .lambda.1 to .lambda.n, two parallel polarization filters for each wavelength .lambda.1 to .lambda.n, and two perpendicular polarization filters for each wavelength .lambda.1 to .lambda.n. A complete detection and analysis of the polarization characteristics of the circularly polarized radiation is achieved by applying a quarter wave plate to each polarization component (both parallel and perpendicular) of each wavelength .lambda.n to provide two measurements, one with and one without the quarter wave plate for each measurement (both parallel and perpendicular) at each wavelength .lambda.n.
REFERENCES:
patent: 2309626 (1943-02-01), Conrad
patent: 2535781 (1950-12-01), Burchell
patent: 3488105 (1970-01-01), Snaper
patent: 3897136 (1975-07-01), Bryngdahl
patent: 4807981 (1989-02-01), Takizawa et al.
Arnold Bruce Y.
Grumman Aerospace Corporation
Lerner Martin
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