G - Physics – 01 – J
Patent
G - Physics
01
J
73/52, 340/155.2
G01J 1/04 (2006.01) G01J 1/42 (2006.01) G01J 5/62 (2006.01) G02B 26/04 (2006.01)
Patent
CA 1310506
ABSTRACT OF THE DISCLOSURE An electromagnetic radiation detecting device comprises at least one radiation detector for detecting electromagne- tic radiation from a hemisphere, a radiation-transparent protective hood covering the or each detector, an a rotary chopper to alternately shield the or each detector and associated hood from arriving radiation and to expose the detector and hood to such radiation. The chopper comprises a carrier disc, which is rotatable about an axis parallel to a radiation-receiving area of the or each detector, an at least one hollow semicylindrical shielding member fixed at the periphery of the disc and curved in the axial direc- tion of the semicylindrical shape. The or each shielding member is movable on a circular path by the disc to alter- nately shield and reveal the hood covering the or each detector.
560490
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Deutsche Forschungs- Und Versuchsanstalt Fur Luft Und Raumfahrt
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