Laser Photoelectric Detector

General Discussion on Laser and related Topics.

Moderator: wler

Gesperrt
ahazlewood
Beiträge: 2
Registriert: So 01 Jun, 2003 9:43 pm

Laser Photoelectric Detector

Beitrag von ahazlewood » So 01 Jun, 2003 10:01 pm

We are attempting to use a class 2 laser photoelectric detector over an outdoor distance of 300 feet (through beam detection). We get a lot of short (one to several milliseconds) detector operations whenever a nearby warm air heater is on. Any idea as to the cause?

Benutzeravatar
floh
Beiträge: 2406
Registriert: Mo 04 Feb, 2002 12:00 pm
Do you already have Laser-Equipment?: Lexel 88, Compass 315, diverse HeNe und eine Menge Kleinkram.
Wohnort: Ostschweiz
Kontaktdaten:

Re: Laser Photoelectric Detector

Beitrag von floh » Mo 02 Jun, 2003 10:59 am

first, electromagnetic influences from the heather trigger your detector. use shielded wires from the detector to the electronic and connect the shield to ground.

second, if the heather blows thru or near the laserbeam, the beam may be flicker (like a hot street flicker if you look to a far point on it)

ahazlewood
Beiträge: 2
Registriert: So 01 Jun, 2003 9:43 pm

Re: Laser Photoelectric Detector

Beitrag von ahazlewood » Fr 06 Jun, 2003 5:48 am

The heater actually blows across the laser beam. Any idea as to the "typical" duration of the flicker one could expect (our last from a few miiliseconds right up to a second or two).

Benutzeravatar
ekkard
Beiträge: 1796
Registriert: Mi 21 Feb, 2001 12:00 pm
Do you already have Laser-Equipment?: 1 Kopf
Wohnort: Overath,Germany
Kontaktdaten:

Re: Laser Photoelectric Detector

Beitrag von ekkard » Fr 03 Okt, 2003 12:37 am

did you check if the detector itself is sensitive for infra red radiation (by heaters and other sources)? Normally such light barriers work with a filter which lets pass the wavelength of the beam used and nothing else.
Mit freundlichen Grüßen
Ekkard

Gesperrt

Zurück zu „Laserboard [en]“

Wer ist online?

Mitglieder in diesem Forum: 0 Mitglieder und 3 Gäste