Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
Patent
1979-05-24
1981-09-29
Buczinski, S. C.
Optics: measuring and testing
Angle measuring or angular axial alignment
With photodetection remote from measured angle
307360, 340366B, 356141, 356400, G01B 1126
Patent
active
042919770
ABSTRACT:
An adjustment device for aligning a group of cyclically switched transmitters or receivers with a single receiver or transmitter of the kind in which a series of spatially spaced beams pass between the transmitters and the receiver, or alternatively between the transmitter and the receivers. In a preferred form the adjustment device is used to ensure alignment of a row of infra-red transmitters which direct beams of light to a photoelectric converter arranged at the focus of a concave mirror. The adjustment device features a coincidence circuit the outputs from which indicate that signals transmitted from the end transmitters of the row are received at the photoelectric converter. The outputs are used to energize respective adjustment indicating lamps. In a particularly preferred arrangement threshold circuitry is used to produce winking of the lamps when approximate adjustment has been achieved; continuous lighting of the lamps shows that accurate adjustment is present. The lamps can conveniently be placed adjacent their associated transmitters.
REFERENCES:
patent: 3012469 (1961-12-01), Clayborne
patent: 3628868 (1971-12-01), Starkey
patent: 3723003 (1973-03-01), Vockenhuber et al.
patent: 3781111 (1973-12-01), Fletcher et al.
patent: 3849769 (1974-11-01), Chiba
patent: 4040738 (1977-08-01), Wagner
Erdmann Jurgen
von Stein Walter
Buczinski S. C.
Erwin Sick GmbH - Optik-Elektronik
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