Pupil stop for multi-band focal plane arrays

Details Pupil stop for multi-band focal plane arrays Pupil stop for multi-band focal plane arrays

1998-02-27

2000-03-07

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2503381, 359350, 359589, G01J 508

Patent

active

060343729

ABSTRACT:
A multi-band pupil stop is disclosed for use in multi-band focal plane array imaging systems. The object is to provide similar point spread functions at the focal plane array. The pupil stop is comprised of one or more nested annuli. Each annulus is a pass-band filter with the outermost annulus passing the longest wavelength waveband and each successive inner annulus passing a successively shorter wavelength waveband. The pass-band of each annulus is such that the ratio of the center wavelength of each pass-band to the outer diameter of each annulus is approximately equal.

REFERENCES:
patent: 4683496 (1987-07-01), Tom
patent: 5751473 (1998-05-01), Runciman
Reine, M. B. et al, "Independently-accessed Back-to-Back HgCdTe Photodiodes: A New Dual-band Infrared Detector," Proc. 1993 Workshop on the Physics and Chemistry of Mercury Cadmium Telluride and Other IR Materials, Seattle, Washington, Oct. 19-21, 1993. Reference supplied with original filing 08/984309 FD Dec. 3, 1997.

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