Optical: systems and elements – Compound lens system – With curved reflective imaging element
Patent
1996-06-27
1998-01-20
Nguyen, Thong
Optical: systems and elements
Compound lens system
With curved reflective imaging element
359725, 359732, 359850, G02B 1700, G02B 1300
Patent
active
057106614
ABSTRACT:
An optical apparatus monitors the entire panorama in low resolution and simultaneously monitors a selected portion of the panorama in high resolution. For the panoramic portion of the apparatus, a mirror having a convex surface of revolution with a hole therein is used. The higher resolution part of the apparatus uses a pointing mirror positioned above this hole. The panoramic and higher resolution views are imaged through lenses or optical components onto a detector. The panoramic view is imaged onto the detector as an annulus of light in which either higher or lower elevational angles of the panorama are imaged further away from the detector's center depending upon how the convex mirror is configured. In this way, the resolution of that portion of panorama that is imaged further away from the detector's center is enhanced. The higher resolution view is imaged to the center of the annulus. Thus, both panoramic and higher resolution portions of the desired scene share the same detector array without interruption, interference, or overlap.
REFERENCES:
patent: 3229576 (1966-01-01), Rees
patent: 5033833 (1991-07-01), Brown
patent: 5181145 (1993-01-01), Eden
patent: 5502309 (1996-03-01), Davis
patent: 5627675 (1997-05-01), Davis et al.
Denson-Low Wanda K.
Grunebach Georgann S.
Hughes Electronics
Lindeen III Gordon R.
Nguyen Thong
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