Natural Science Forum / Physics / Optics / April 2005

Hi, I am using 193nm excimer laser to release my devices made from
copper and polyimide on a 4-inch quartz wafer. For my experiment I need
to release a full wafer of only polyimide and then polyimide with
copper. I have released polyimide with no problem but when I have

Web sites, books, other USENET groups, etc?  I'm interested in getting back
to my 1st love, meteorology, after a decade in computers...

I'm calculating candlepower of a lamp based on a luminance measurement
of its diffuse reflection, using a correction factor based on the
square of the separation between the lamp and the reflector.
My question is, I thought this particular inverse square law only

Can some one please tell me what would be the best type of laser for marking
on wood. Gas or ND YAG.
Many Thanks

I am looking for the neos pcaom (4ch <5w) mentioned in
the laser faq.
Did NEOS dissapear? i cannot fing their website.
Thanks guys

Greets,
I was wondering if anyone knows how to pulse a small pen laser.  or know of a circuit that will do it.
TIA

I have been searching the web and been unable to find a circuit schematic
for a Spectra-Physics 161/262 argon laser.   The system seems dead.  I
observe the igniter attempting to ionize the argon and that there is no
filament on the laser tube.  Are there any folks out there that ...

Our 1990-purchased JEOL6400 SEM recently developed an intermittent
problem of black bands randomly appearing/sliding on its display.
This was traced to an oscillating 24V supply powering, among other
things, its objective lens control board and the objective lens

Was browsing some employment sites and found an interesting
listing. In part,
  "Mechanical Design Engineer, Laser....
   Perform the mechanical design of high energy

Just wanted to shoot off a quick letter and ask if anyone knows where I
could find a laser attached to the end of an articulated multi axis
robot arm for contouring purposes? The reason is I am interested in
using the arm for the motion control, but don't know how to go about

One question, please!
How is the Ziel for biological amateurs?
This ziel, for example: leukos
www.ziel.it

When constructing a Galilaen beam expander which is the lens of choice,
a Plano-concave or Bi-concave?
Thanks
Steve

I need an economical way to cement a couple of flat clear glass surfaces
together for indoor use.
The application is low tech but I don't want to trash the image passing
through the glass surfaces. So something close to optical grade cement

Alright, let me see if i can word this right.  I have observed that if
I close one eye, then hold up a finger around 5 inches from my face
and focus on say a picture or piece of text lying on a desk, my
finger is quite blurry, and when I move my finger around, the parts

there is a auction #  5574386984 that is for a yv04 crystal with some
sort of prysm does anyone know what these things were used for?
thanks
John C