home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!caen!kuhub.cc.ukans.edu!wellison
- From: wellison@kuhub.cc.ukans.edu
- Newsgroups: sci.electronics
- Subject: Re: Laser gunsights
- Message-ID: <1993Jan9.122133.46254@kuhub.cc.ukans.edu>
- Date: 9 Jan 93 12:21:33 CST
- Organization: University of Kansas Academic Computing Services
- Lines: 28
-
- With all of this laser targeting systems discussion, I thought I would put my
- two cents worth in. Laser targeting systems were developed by the military for
- two things. One, for simulated battle situations where a kill was detected by
- your opponet's detector and visa versa. The lasers used were and are IR diode
- lasers (I.E. invisible). Second, they were used for actual combat to target an
- object, like a tank, with a laser source for guidence on laser guided missiles.
- The common type that we as civilians see are a product of the visible laser
- diode who was introduced on the commercial market in mid 1989. These are
- identical to the laser diodes used in laser pointers. The idea is for better
- sighting and target hitting as well as for intimidation. Some guy has a police
- .38 cal pistol pointed at him and a red dot on his forehead, he will think
- twice about doing something stupid. As with ANY laser light source, the power
- is concentrated into a very tigh beam. The intensity is thousands of times
- brighter than ambient light and therefore, the possibiliy for eye injury is
- there. The commercial target lasers are between 3mW and 5mW at 670Nm. The light
- percieved by the eye is about 1mW at 5mW, but the diode lasers have strong
- harmonics in the near IR band, which is 780Nm to 840Nm and that you can't see.
- So the danger exist for eye damage even though you can't see it. These lasers
- are rated Class IIIa, which the CDRH (Center for Devcies and Radiological
- Health) has determined could cause perment eye damage if viewed directly. But
- the best rule to follow is: NEVER VEIW ANY LASER BEAM DIRECTLY NO MATTER WHAT
- IT"S POWER ! ! !. If you have a target laser, DO NOT point it into a person's
- eyes unless of course in 3 seconds, he won't need them any more ;-) Lasers are
- fun things to play with (I have been playing with them for 24 years), but above
- all, use common sense as they are not harmless toys and can cause severe injury
- if used carelessly.
-
- -=-= Wes =-=-
-