Method and apparatus for timing of laser beams in a multiple las

Details Method and apparatus for timing of laser beams in a multiple las Method and apparatus for timing of laser beams in a multiple las

1979-04-13

1981-06-09

Corbin, John K.

Optics: measuring and testing

By particle light scattering

With photocell detection

356358, G01B 902

Patent

active

042721938

ABSTRACT:
The optical path lengths of a plurality of comparison laser beams directed to impinge upon a common target from different directions are compared to that of a master laser beam by using an optical heterodyne interferometric detection technique. The technique consists of frequency shifting the master laser beam and combining the master beam with a first one of the comparison laser beams to produce a time-varying heterodyne interference pattern which is detected by a photo-detector to produce an AC electrical signal indicative of the difference in the optical path lengths of the two beams which were combined. The optical path length of this first comparison laser beam is adjusted to compensate for the detected difference in the optical path lengths of the two beams. The optical path lengths of all of the comparison laser beams are made equal to the optical path length of the master laser beam by repeating the optical path length adjustment process for each of the comparison laser beams. In this manner, the comparison laser beams are synchronized or timed to arrive at the target within .+-.1.times.10.sup.-12 second of each other.

REFERENCES:
patent: 3175088 (1965-03-01), Herriott
patent: 3950100 (1976-04-01), Keene et al.
patent: 4030831 (1977-06-01), Gowrinathan
Morgan, Introduction to Geometrical and Physical Optics, McGraw-Hill, pp. 223-227, 1953.

Affiliated with

Also associated with

Rating

Method and apparatus for timing of laser beams in a multiple las 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 apparatus for timing of laser beams in a multiple las, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for timing of laser beams in a multiple las will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1261383