Natural Science Forum / Physics / Optics / March 2005

Does anyone know what the eye safety requirement for Erbium YAG laser?  Can
I use a CO2 goggle in its place?

I recently got a crystal for doubling my yag laser and all was fine until I
got a little aggressive with my q-switch.  I was pumping the crystal with
about 10 watts of 1064 (extracavity) and the q-switch running at 25 kHz.
When I backed down the q-switch to 10 kHz there was a ...

I am new to optical simulation packages, so any help here would be
great!
I need to simulate a thick pinhole in order to characterize the
off-axis behavior, but it doesn't seem like programs like OSLO-EDU and

Ive got an omnichrome laser (the one like the 60x)
I took it apart tonight and cleaned all of the optics. I only used
de-ionized water (dont have other solovents at this time)  I put it
together and it didn't lase..  I tweaked the mirrors for a while and it

I bought an old (7o's, 80;s?) light microscope at a tag sale. It is
very well built and pretty power full, but whenever I look into the
eyepeice, nomatter whaat the objective, I see dark blotches and
little specs. I.v tried cleaning it, and I don't know what the

Dear Sirs
I need if someone can help me bringing information about the
connections pins between Cambridge Scanners 6210 and Cambridge 677
drivers .,

What are the simplest designs for microscopes?

Hey All...
I have a question about low power pulsing an arc lamp... is it possible
to do so with out serious effects? or am I stuck with running it CW?
just wondering...

I found some more Zeiss parts included in an auction lot. There are two 6
volt light sources, a stage, and a condenser underneath the stage. One of
the light sources attatches above the objective turret. Does anyone know
what type of parts they are? Are any of the parts valuable?

Just got done watching tonights CSI Miami episode.
They portrayed a guy using a handheld 5mW green laser
pointer bringing down a small cargo jet half a mile
up and causing retinal burns to the pilot on a clear

How does a veterinarian microscope work?

I purchased some items at a sale and some Zeiss microscope parts were
included. What are these parts called? Are they worth much?
Part 1
http://img.photobucket.com/albums/v87/will9198/head1.jpg

I've mentioned in other threads here I'm developing an adapter that
mounts 35mm lenses on DV cameras, to get the manual focus and DOF of
a 35mm lens. Here's the link to a
tutorial describing an older prototype, for any interested.

a laser is usually a high reflector and an outcoupling mirror, say 80%,
and the laser medium in between them.
Let's assume the laser runs very stable, i.e. small changes on either
one of the mirrors doesn't affect the lasing much.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=8255&item=5761872586
Here's a chance to find out how professionals cool their fiber-coupled pump
diodelasers
wijnberg