Multiple drum apparatus for high speed scanning of...

Details Multiple drum apparatus for high speed scanning of... Multiple drum apparatus for high speed scanning of...

2006-06-27

2006-06-27

Le, Que T. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S239000

Reexamination Certificate

active

07067798

ABSTRACT:
Scanning apparatus operable for radiaton comprises a hollow polygonal primary drum rotatable about a central axis to present a plurality of internally presented sides or facets capable of reflecting the radiation concerned. A fixed Mangin mirror mounted within the primary drum directs such radiation onto the internally presented sides or facets of the primary drum to be reflected therefrom onto a rotating reflective faceted secondary drum. The secondary drum reflects the radiation onto a radiation receiver or sensor. The secondary drum is arranged to be rotated about an axis parallel with the rotary axis of the primary drum, in synchronism with the latter, in such a way that, over each line scanning period, radiation from substantially all of the respective facet of the primary drum can reach the receiver or sensor via the secondary drum.

REFERENCES:
patent: 2070460 (1937-02-01), Traub
patent: 4037920 (1977-07-01), Runciman et al.
patent: 4486662 (1984-12-01), Abel
patent: 4487473 (1984-12-01), Hatch
patent: 5198919 (1993-03-01), Reeder
Lettinton A H et al: Opto-Mechanical Scanners for Passive Millimeter-Wave Imaging Proceedings of the SPIE, SPIE, Bellingham, VA US, vol. 4032, Apr. 2000 pp. 74-80.

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