Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
Patent
1985-05-07
1987-12-15
Buczinski, Stephen C.
Optics: measuring and testing
Angle measuring or angular axial alignment
With photodetection remote from measured angle
356 5, G01B 1126, G01C 100, G01C 308
Patent
active
047129158
ABSTRACT:
The invention relates to an arrangement for holding an instrument aligned onto a movable reflector, which may have the form of a cube corner prism. The instrument has a transmitter which transmits a slightly divergent beam of electromagnetic radiation onto the reflector, and a receiver which receives the radiation reflected by the reflector. An optical periphery modulator is placed downstream of the transmitter in the proximity of a lens or in a collimated beam path. The modulator modulates differently various peripheral parts of the transmitted beam of radiation, and if the instrument is not correctly aligned with the prism, the modulator introduces a modulation of low frequency of the radiation received by the receiver in a manner such that the phase position of the modulation is dependent on the direction in which the transmitted beam of radiation deviates from optimal alignment with the prism, and such that the amplitude of the modulation signal is dependent on the extent of this deviation. An electric circuit analyses the phase of the modulation signal and controls an instrument aligning means on the basis of the analyzed phase, so that the reflector lies within a predetermined area of the optical axes of the transmitter and receiver, e.g. in the center of the transmitter lobe.
REFERENCES:
patent: 3637312 (1972-01-01), Cantor et al.
patent: 3809477 (1974-05-01), Russell
patent: 3901596 (1975-08-01), Vincent et al.
patent: 4240069 (1981-12-01), Hullein et al.
patent: 4256958 (1981-03-01), Cornwell
patent: 4560270 (1985-12-01), Wiklund et al.
Kosakowski Alex S.
Lundqvist Mats A.
Buczinski Stephen C.
Geotronics AB
Koltak Melissa L.
LandOfFree
Arrangement for holding an instrument in alignment with a moving does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Arrangement for holding an instrument in alignment with a moving, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for holding an instrument in alignment with a moving will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1216632