Patent
1977-02-09
1978-11-07
Corbin, John K.
G02B 2717
Patent
active
041242696
ABSTRACT:
A scanning system for use in an air-borne vehicle and adapted for collecting and focusing radiation received by periodically scanning a strip of the ground from which radiation energy is being collected extending tranversely to the course of flight, comprising a scanning mirror having at least three radiation reflective surfaces mounted in symmetric and parallel relationship relative to the axis of rotation of said scanning mirror. Each one of said radiation reflective surfaces during its active scan interval consecutively views a first optical system and a second optical system respectively. Said first optical system and said second optical system as well, each are adapted to collect and focus respectively radiation reflected from the respective one of said radiation reflective surfaces during its active scan interval onto a focal point within the entrance aperture of a radiation detector. An optical switch or light beam chopper which operates in synchronism with the rotating scanning mirror is effective to alternately direct the two separate beams focused by said first and second optical systems respectively on the radiation detector.
REFERENCES:
patent: 3211046 (1965-10-01), Kennedy
patent: 3594578 (1971-07-01), Ohman
patent: 3619029 (1971-11-01), Crownover
Colvin Arthur B.
Corbin John K.
de los Reyes B. W.
N.V. Optische Industrie "De Oude Delft"
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