Optics: measuring and testing – Photometers – Photoelectric
Patent
1994-12-09
1996-10-29
Pham, Hoa Q.
Optics: measuring and testing
Photometers
Photoelectric
356221, G01J 142
Patent
active
055701787
ABSTRACT:
A system for receiving electromagnetic energy with reduced signal aliasing in the cross-scan direction. The system is adapted to be mounted on a spacecraft or an aircraft for movement over a surface in the cross-scan direction and has a sensor for receiving electromagnetic energy. The invention (10) includes an arrangement for directing energy to the sensor which has an astigmatic blur in the cross-scan direction which is effective to reduce aliasing of a signal transmitted or received by the system in the cross-scan direction of movement. In the illustrative embodiment, the invention (10) includes an array (20) of radiometric detectors. A reflective optical arrangement directs energy from a surface to the detector array. The optical arrangement includes at least one mirror (16) which has a small controlled cylindrical surface perturbation which introduces an astigmatic blur into the received image which reduces aliasing of the signal in the cross-scan direction.
REFERENCES:
patent: 4575193 (1986-03-01), Greivenkamp, Jr.
patent: 4624538 (1986-11-01), MacFarlane
patent: 4628468 (1986-12-01), Thompson et al.
patent: 5322998 (1994-06-01), Jackson
Malinowski Frank R.
Young James B.
Denson-Low W. K.
Pham Hoa Q.
Santa Barbara Research Center
Schubert W. C.
LandOfFree
Scanning imaging system having reduced detected signal aliasing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scanning imaging system having reduced detected signal aliasing , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scanning imaging system having reduced detected signal aliasing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1789503