green lasers

Are these lasers similar to the ones we have Al?

The ones we have are the 3-5mv ones that gordon described.

I've no intenetion of modifying mine. Last time I decided to "fix" a laser in college I got a nasty electric shock. Back in the days when interesting things were to be found in the skips at the physics block in UCD.

Cheers,
~Al

Are these lasers similar to the ones we have Al?

The ones we have are the 3-5mv ones that gordon described.

I've no intenetion of modifying mine. Last time I decided to "fix" a laser in college I got a nasty electric shock. Back in the days when interesting things were to be found in the skips at the physics block in UCD.

Cheers,
~Al

A few days ago the lens fell off my Casio QV-4000 digital camera so I bought a Sony digital camera as a replacement. In low light, the Sony uses a very low power laser to help focus. The documentation mentions laser guidelines for the U.S. FDA, E.U. and other agencies for this class of laser which specify that it must be safe to look at the beam for 30,000 seconds. I wonder who volunteers to test these things Kids, don't try this at home. I turned off the laser "feature" just so people wouldn't be disturbed by the beam.

The Helium Neon laser I replaced in my original (1980) laserdisk player used a 4000V power supply, which as Al has discovered, is much more dangerous than the actual beam, especially when I misread the replacement ballast resister code by a factor of 10.

Can you post the laser type and the exact mod they made,
This would be very interesting, and not for downing planes by the way

I would if I could but the guys were not at all keen to discuss the details with me!

Can't imagine why?

Bart.

Yes I would be very interested too. Perhaps we can find something on the net.

Jouke

How would a laser assist in astronomy? Pinpointing stars during alignment of the scope?
Bill.

How would a laser assist in astronomy? Pinpointing stars during alignment of the scope?
Bill.

The one I saw is used soley for showing people constelations and so forth. As the stars are at infinite distance (effectively) so that if you point a laser at aldebaran, a person stading anywhere else that can see the laser will also see it pointing at aldebaran. It is simply ideal for showing people the sky.#

Bart.