F - Mech Eng,Light,Heat,Weapons – 41 – G
Patent
F - Mech Eng,Light,Heat,Weapons
41
G
341/80
F41G 9/00 (2006.01) F41G 7/26 (2006.01)
Patent
CA 1102432
ABSTRACT OF THE DISCLOSURE A beam projector which is controlled to alternately transmit rectangular cross-sectional beams substantially parallel to a pro- jection axis, wherein the beams are respectively pulse modulated over a correspondingly distinct pulse rate frequency range to supply yaw and pitch information and are respectively scanned in a direction correspondingly orthogonal to its cross-sectional length. The size format of the beam cross-sections and the angle of the scan are controlled according to a predetermined time variable function. In a first time period, the largest cross- sectional being are alternately transmitted and the scan angle is decreased 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 proportionately smaller cross-sectional beams are transmitted and the scan angle is con- tinually controlled. A first embodiment employs the use of a single set of proportionately different size formatted cross-sectional laser sources as a radiation generator, a scanning mechanism and a beam chopped fixed focus optical system to effect alternately trans- mitted beams, of selectable cross-section, orthogonally oriented and scanned with respect to each other. A second embodiment displays two corresponding sets of proportionately different size formatted cross-sectional laser sources, a scanning mechanism and a non-chopping fixed focus optical system to effect alternately transmitted beams of select- able cross-section, orthogonally oriented and scanned with respect to each other.
308147
Ford Aerospace & Communications Corporation
Gowling Lafleur Henderson Llp
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