Method and circuit arrangement for frequency-, distance-, and an

Details Method and circuit arrangement for frequency-, distance-, and an Method and circuit arrangement for frequency-, distance-, and an

1985-04-19

1987-02-17

Corbin, John K.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356386, G02B 2610

Patent

active

046435174

ABSTRACT:
A method and circuit arrangement for performing surface measurements to enable a beam source to be triggered such that changes in the oscillation frequency, maximum scanning angle, and distance from the measurement surface of the scanner are automatically compensated for. In one embodiment an alternating voltage proportional to the lateral displacement of the impinging beam from a reference point is generated and then compared with a stepped reference voltage. A trigger signal is produced when the alternating voltage equals the reference voltage, so that the beam impinges at equidistant intervals. The reference voltage is adjusted to compensate for changes in distance and maximum scanning angle. In another embodiment, a pulse sequence is generated such that the number of pulses occurring in the scanning cycle is constant. The pulses are counted and the count is compared with reference values corresponding to equiangular intervals. A trigger signal is output if the count equals the reference value.

REFERENCES:
patent: 3178510 (1965-04-01), Rosin et al.
patent: 3899663 (1975-08-01), Pirlet
patent: 4063820 (1977-12-01), Borgese
patent: 4067652 (1978-01-01), Bohlander

Affiliated with

Also associated with

Rating

Method and circuit arrangement for frequency-, distance-, and an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and circuit arrangement for frequency-, distance-, and an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and circuit arrangement for frequency-, distance-, and an will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1934030