Laser diode distance measurement

Details Laser diode distance measurement Laser diode distance measurement

1991-11-27

1993-11-30

Willis, Davis L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356 3, 356 4, 356 45, 356356, 356349, 359 16, G01B 1102

Patent

active

052670163

ABSTRACT:
A laser diode distance measurement device includes a laser diode 10 which emits light 20 to a lens 22 which provides focussed light 24 incident on a target 26. The light 24 is reflected from the target 26 back to the laser diode 10 which causes the laser diode 10 to emit a light 28 which exhibits intensity pulses (due to coherent interference) related to the distance L to the target 26. A photodetector 30 provides a feedback signal indicative of the intensity of the light 28 to a distance measurement circuit 18. The laser diode 10 is driven by an up-ramp signal that reduces electronic processing and at a frequency that reduces speckle noise. The distance measurement circuit 18 blanks-out a portion of the feedback signal during discontinuities of the laser diode drive signal to minimize associated noise from distorting the distance measurement.

REFERENCES:
patent: 4715706 (1987-12-01), Wang
patent: 5020901 (1991-06-01), de Groot
patent: 5082364 (1992-01-01), Russell

Affiliated with

Also associated with

Rating

Laser diode distance measurement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Laser diode distance measurement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser diode distance measurement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2100650