Aeronautics and astronautics – Missile stabilization or trajectory control – Remote control
Patent
1977-12-12
1980-02-05
Pendegrass, Verlin R.
Aeronautics and astronautics
Missile stabilization or trajectory control
Remote control
F41G 900, F42B 1502
Patent
active
041868994
ABSTRACT:
A beam projector which is controlled to alternately transmit rectangular cross-sectional beams substantially parallel to a projection 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 beams are alternately transmitted and the scan angle is decreased as a function of time, so that a fixed area of detectable 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 continually controlled.
A first embodiment employs the use of a single set of proportionately different size formattec cross-sectional laser sources as a radiation generator, a scanning mechanism and a beam chopper fixed focus optical system to effect alternately transmitted beams, of selectable cross-section, orthogonally oriented and scanned with respect to each other.
A second embodiment employs 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 selectable cross-section, orthogonally oriented and scanned with respect to each other.
REFERENCES:
patent: 3028807 (1962-04-01), Burton et al.
patent: 3398918 (1968-08-01), Girault
patent: 3690594 (1972-09-01), Menke
patent: 3782667 (1974-01-01), Miller, Jr. et al.
patent: 3995792 (1976-12-01), Otto et al.
patent: 4111385 (1978-09-01), Allen
Ford Motor Company
Godwin Jr. Paul K.
Pendegrass Verlin R.
Sadler Clifford L.
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