Laser beam delivery path and target proximity sensor

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

606 12, 250561, G01J 132

Patent

active

053827856

ABSTRACT:
A laser diode operating system utilizes the photodiode mounted in the housing of the laser diode, and monitors the photodiode signal to check for a clear laser beam delivery path and a target proximate to the output of the beam path. Upon initial power-up of the system, a brief laser pulse is emitted, and laser light reflected retrograde in the delivery path is received by the photodiode. If the photodiode signal exceeds a first threshold level, due to occlusion of the delivery path, further operation of the system is prevented until the delivery path is cleared. During operator use, the photodiode signal is compared with a second threshold level, and operation is interrupted if the signal fails to exceed the second threshold level. During interruption of operation mode, the laser diode is pulsed briefly and reiteratively to ascertain if a target object is proximate to the laser diode output. If the reflected light level indicates that a target object is proximate, the system will restore continuous operating mode while continuing to monitor the photodiode current.

REFERENCES:
patent: 4692924 (1987-09-01), Koizumi et al.
patent: 5200604 (1993-04-01), Rudko et al.
patent: 5285058 (1994-02-01), Goodwin

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Laser beam delivery path and target proximity sensor 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 beam delivery path and target proximity sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser beam delivery path and target proximity sensor will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-748428

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.