F - Mech Eng,Light,Heat,Weapons – 41 – G
Patent
F - Mech Eng,Light,Heat,Weapons
41
G
88/96.2
F41G 7/26 (2006.01) G02B 26/10 (2006.01)
Patent
CA 1114211
ABSTRACT OF THE DISCLOSURE A beam projector which is controlled to alternately transmit rectangular cross-sectional beams substantially parallel to a projection axis, wherein the beams are respec- tively pulse modulated over a correspondingly distinct pulse rate frequency range to supply yaw and pitch information and are respectively scanned in a direction correspondingly or- thogonal to the cross-sectional length of each beam. The size format of the beam cross-sections and the angles of scan are controlled according to a predetermined time variable function. In a first time period, the largest cross-sectional beams are alternately transmitted and the scan angle is de- creased as a function of time, so that a fixed area of detect- able information is available for detection with respect to an imaginary orthogonal reference plane moving along the projection axis at a rate corresponding to the predetermined time variable function. In subsequent time periods propor- tionately smaller cross-sectional beams are transmitted and the scan angle is continually controlled. The disclosed embodiment employs the use of a single set of proportionately different size formatted cross-sectional laser sources as a radiation generator, a scanning mechanism, a vibrationally modulated Pechan type prism and a fixed focus optical system to effect alternately transmitted beams, of selectable cross- section, orthogonally oriented and scanned with respect to each other.
329259
Ford Aerospace & Communications Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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