Date: Thu, 11 Nov 2004 06:27:10 -0800 (PST)

Author: Marc Kossover

Subject: Re: Laser pointers


--- sampere wrote:

> Laser pointers don't have an external power supply
> for a reason -
> they're meant to be portable. An external power
> supply makes then NOT
> portable. So I think all of us on this list can
> search every site and
> we won't find that beast.

Of course, Steve Wonell did find one.
. It looks nice
although I have never used it. I will also point out
that for a while several of the science supply houses
were selling red diode lasers in casings that were
similar to the ones used by gas lasers. The advantage
was that they had all the same fittings so the
accessories could be interchanged. However, these
small run items were much more expensive than the mass
market pen style laser pointers so they have more or
less gone away.

> I use laser pointers in the labs though, both red
> and green. Here's my
> 'technical' solution to that problem. I use a paper
> binding clip to
> hold the power button on.

A picture from an office supply store in the US. Arbor
also sells a laser pointer tripod for about 14 $US
that works well.

I just use stuff that I have stolen from chemistry. I
wrap tape around the laser pointer then I use a bar
clamp to clamp it to a lab stand that I then clamp to
the table with a standard carpenters' clamp. I then
search around for a broken buret clamp that only has
the part that clamps to the bar left working. I place
the screw right over the button and turn to press and
lock the button.

Oh, and yeah, I use a green laser pointer in the lab.
They seem to be much, much brighter than red,
espeically the old fashioned 670 nm red. They work
well with diffraction gratings, slits, and holograms.
They will energize some glow-in-the-dark tapes, but
not all.

Marc "Zeke" Kossover
The Jewish Community High School of the Bay

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From Thu Nov 11 09:29:15 2004