Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
Patent
1979-02-22
1980-08-19
Buczinski, S. C.
Optics: measuring and testing
Angle measuring or angular axial alignment
With photodetection remote from measured angle
35 25, 89 41L, 235412, 273312, 356 5, 455603, 455600, G01B 1126, F41F 2700, F41G 326
Patent
active
042181380
ABSTRACT:
The positions of target reflectors at a distance from a measuring station are measured with fan-shaped angularly sweeping beams of radiation emitted from the measuring station and reflected back to a detector there when each beam is intercepted by a reflector. Expected reflector distribution is analyzed to ascertain, as between adjacent reflectors at equal distances from the station, the minimum projected distance expectable between such reflectors in a separation direction in which separation can be maximum and the maximum projected distance between them in the transverse direction. Each of at least two beams has its long cross-section dimension oriented to be at an angle to that of the other and at an angle to the separation direction which is such that its tangent value is greater than the ratio of said maximum distance to said minimum distance. Each of those beams is swept to move between intersection with an origin point on one side of a solid angle space swept by the beams and intersection with another point that is on the opposite side of said space and is spaced in the separation direction from the origin point. Angular positions of both beams are assigned increasing magnitudes with increasing distance from the origin point, for unambiguous measurement of target positions. For a given orientation of long cross-section dimensions of each beam, targets at like distances from the station must each be in an hour-glass-shaped region of isolation related to that beam orientation.
REFERENCES:
patent: 2514617 (1950-07-01), Albersheim
patent: 3056129 (1962-09-01), Albersheim
patent: 3484167 (1969-12-01), Burns, Jr.
patent: 3588108 (1971-06-01), Ormiston
patent: 3609883 (1971-10-01), Erhard
patent: 3832791 (1974-09-01), Robertsson
patent: 3907433 (1975-09-01), Nault
patent: 4123165 (1978-10-01), Brown et al.
Buczinski S. C.
Saab-Scania Aktiebolag
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