Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1989-09-15
1992-08-25
Buczinski, Stephen C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250214B, 250561, 307311, 328111, 328112, 328114, H01J 516, H01J 4014, H03K 522
Patent
active
051421429
ABSTRACT:
A portable laser detection device is disclosed. Optical pulses are sensed by a photodiode and if the pulse width is less than a predetermined value a laser occurred indicator will flash until reset by the user. A laser present indicator will flash and an intermittent audible tone will be generated as long as laser energy having certain characteristics is present. A delay circuit ensures error free detection if a pulse having a width greater than the predetermined value is received immediately after a pulse having a width less than the predetermined value is received. Further, a high energy pulse with a sufficiently fast rise time received by the detector will cause the laser occurred indicator to flash, the laser present indicator to be illuminated continuously, and an audible tone to be generated. The device is shielded against electromagnetic interference and adapts automatically to variations in background noise.
REFERENCES:
patent: 2489297 (1949-11-01), Labin et al.
patent: 3867628 (1975-02-01), Brown
patent: 3992099 (1976-11-01), Laughlin
patent: 4102059 (1978-07-01), Kimble et al.
patent: 4236069 (1980-11-01), Laughlin
patent: 4263508 (1981-04-01), Leary et al.
patent: 4276472 (1981-06-01), Costantino et al.
patent: 4366378 (1982-12-01), Simons
patent: 4678437 (1987-07-01), Scott et al.
patent: 4724312 (1988-02-01), Snaper
patent: 4748318 (1988-05-01), Bearden et al.
patent: 4778990 (1988-10-01), Laughlin
patent: 4792675 (1988-12-01), Laughlin
patent: 4835381 (1989-05-01), Sorensen
Fowler Clarence W.
Mays, Jr. Robert
Rutter Sheldon M.
Senechalle David A.
Buczinski Stephen C.
Trator Inc.
LandOfFree
Portable device for detecting short duration energy pulses does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Portable device for detecting short duration energy pulses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable device for detecting short duration energy pulses will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-386872