Programmable scanner/tracker

Details Programmable scanner/tracker Programmable scanner/tracker

G - Physics

01

S

343/7, 340/136.2

G01S 17/42 (2006.01) G01D 5/32 (2006.01) G01D 5/36 (2006.01) G01S 13/72 (2006.01) G01S 17/66 (2006.01)

Patent

CA 1200879

ABSTRACT A scanning and/or tracking mechanism for use in airborne obstacle avoidance optical radars operating in the infra-red region. The radar beam is scanned by passing it through a pair of in-line rotating optical wedges which rotate around the boresight axis and which are transparent to the infra-red radiation. The wedges are separately driven by servo systems including hollow shaft torque motors with the wedges mounted in the hollow shafts thereof. A high resolution and low backlash shaft position encoder is utilized comprising encoding discs directly driven by the optical wedges and including a novel decoding system.

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