Natural Science Forum / Physics / Optics / November 2004

I've just been checking over my recently acquired PCAOM before putting a
beam through it and I can see a slight haze on the surfaces. What can be
safely used to clean it (it's an MVM unit, if it matters)?
TIA,

I'm building a home made laser power meter using some reversed biased
photo diodes hooked up to some lm324 op amps. One of the diodes will
have the beam directly on it while the other will have light reflected
on it via two microscope slides (in case I ever manage anything with

Can anyone please recommend where I can buy circular glass cover slips
of 27.5mm.
Ideally of thickness #2 or more.
I need them to insert into Plankton chambers, and at present I can

I'm on a mailing list for some microscopy related journals, and have noted
that scale bars included with electron micrographs are being labelled in
"mm" (in the accompanying text), presumably to indicate a micro-metre.  I
always thought that a "mm" = millimetre, and that ...

I should develop an particular application under Windows using Visual
Studio. I need a digital microscope, connected to the PC, to make an
image analysis of a single hair, which has a thickness of 60-70 um.
Do you have any suggestion to choose a digital microscope not so

OK - I looked on the newsgroups available here but could not find one
devoted to digital camera usage.  (Maybe I just can't see too good today
and I missed it.)
I will do the 'right thing' and also do a web search for my question,

Can anyone please recommend where I can buy circular glass cover slips
of 27.5mm. Ideally of thickness #2 or more.
I need them to insert into Plankton chambers, and at present I can
only get 28mm thickness #1.

I've a new DPSS laser and some questions.
You can see details here : http://sbk.phalkin.com/175mW.htm
In the power supply I have 8 wires to the laser head.
I want to find the wire of the IR diode, to add a regulation pot to

I am looking for filters specifically designed to pass the UVA, UVB
and UVC bands.  Any know of any that are commercially available?
Jonathan Scheuch

I note that the material aluminum oxynitride spinel, amazing simply
because it _is_ transparent, given its hardness and durability, occupies
an interesting location on a diagram of refractive index versus
dispersion; 58.1 dispersion, 1.79 index of refraction.

I'm looking for a bare tube with internal mirrors or a cavity mirror set
for the 1.15 mu HeNe laser line.
Please reply to:
rainer [at] lhft dot de

Up to 30mbit/sec between Mars and Earth!
http://www.space.com/spacenews/businessmonday_041115.html
Anyone have any idea what sort of laser they're using?

I like to know if there are some one how can give some advice on buying a 2
to 5 watt green 532nm for show use, ready to go.
I talked with a Guy from germany: he sayed coherent had a diode problem in
the first diode system, that they just die, becorce it was a Aluminium

I'm looking for a fiber optic acousto-optic  (FAO) modulator with the
following specifications :
1) Incoming light should goes through the AO modulator on 1st diffracted
order.

There was some talk on the group ages ago about the luxeon leds....
moreso in relation to collimating these to emulate a laser beam ..
however the thread was kinda left up in the air if i recall.
has anybody played with these little beasties yet ?