Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1989-10-06
1991-02-19
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
340958, 356 1, 358107, G01N 2186, G08B 2100
Patent
active
049946811
ABSTRACT:
The device includes a source of laser radiation for emitting a beam of planar and thin section in a sector having an angle of divergence adapted to the possibilities of displacement of the moving body, in a plane parallel to the plane of displacement of the moving body. A camera is reponsive to the reflection of the laser radiation from, for example, a point on the front set of wheels of an aircraft. A calculating device responsive to data received from the camera determines the distance and the azimuth of this point relative to a fixed reference, and a display device controlled by the calculating device informs the operator or the pilot of the position of the moving body.
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patent: 4184655 (1980-01-01), Anderberg
patent: 4249159 (1981-02-01), Stasko
patent: 4628469 (1986-12-01), White
patent: 4701047 (1987-10-01), Eibert et al.
patent: 4702605 (1987-10-01), Stern et al.
patent: 4760269 (1988-07-01), McKenna
patent: 4864395 (1989-09-01), Tajima
Messinger Michael
Nelms David C.
Societe d'Etudes et d'Enterprises Electriques (S.E.E.E.)
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