Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reexamination Certificate
2006-06-27
2006-06-27
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
C250S226000
Reexamination Certificate
active
07067784
ABSTRACT:
An imaging system (10) has a fixed lens combination (22), a spatial light modulator (SLM) (20) and a linear detector array (12). A scene image is scanned across a simple array (12) in a direction perpendicular to the array (12) by the SLM (20). This is achieved by displaying a diffraction pattern on the SLM that changes to achieve the scanning. The diffraction pattern displayed typically has a linear element (40) and a quadratic element (42). By having a programmably changed combined chirp pattern (36) displayed on the SLM, and by being able to change it thousands of times a second, an army with fast read out can take the place of a 2-D imaging array.
REFERENCES:
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Database Inspec 'Online! Institute Of Electrical Engineers, Stevenage, GB Lambert A. et al.; “Optical image processing using liquid crystal displays” Database accession No. 5774678 & Coonference Proceedings DICTA-95. Digital Image Computing: Techniques and Applications, Conference Proceedings DICTA-95. Digital Image Computing: Techniques and Applications, Brisbane, Qld., Australia, 12/1995, pp. 354-359, 1995, Brisbane, Qld., Australia, Australian Pattern Recgnition Soc. Australia.
Qing Tang, et al.: “Multiple-Object Detection Wtih A Chirp-Encoded Joint Transform Correlator” Applied Optics, US, Optical Society Of Amercia, Washington, vol. 32, No. 26, pp. 5079-5088.
Manasson V A et al.: “Optically Controlled Scanning Antenas Comprising A Plasma Grating” IEEE Antennas And Propagation Society International Symposium, US, New York, NY: IEEE, pp. 1228-1231.
Epps Georgia
Lu Tony
QinetiQ Limited
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