Natural Science Forum / Physics / Optics / September 2004

Hi, can anybody recommend a mounting medium for live cell fluorescent
microscopy except water? I tried glycerol based mounting medium
VECTASHIELD H-1000 but it bursted my cells immediately. Water is okay
but is there anything better than water in terms of preventing the

I recently got several Uniphase 2214 series argon ion heads. Since I
already have a perfectly working head and the 2110 power supply, I
know the problem isn't the power supply.
One of the heads seems to start, but the beam is extremely unfocused

I have enjoyed lurking in this group for sometime and now would like some
advice/opinions on a microscope purchase.
Let me start by saying that I have always been interested in microbiology
and have used   a microscope in my younger years.  I was a camera

i will have to design a projector system in my lab.I have been given
a fresnel lens and an objective(projection lens).What i require is to
find the equations which give the relation b/w the focal lengths
f1,f2,f3,f4 and the distance d1,d2,d3.

Can anybody tell me a cheap and effective way of stopping laser beams from
hitting me, as I am being targeted by them.  thanks.
Mike

In an earlier group posting someone had highlighted that there is a
flaw in multi-mode fibers that is well known at the center core due to
the incomplete pre-form when the fiber is drawn.  This was dated
Feb.2001.  Could someone indicate the reference to where this

I need a PCAOM and driver, preferably 8 channel but 6 channel would do, in
good used condition; need argon lines + 633nm at least. I'm fed up with
waiting for them to turn up on ebay, I've only seen 2 in the last 5-6
months, the previous one had a ridiculously high reserve and ...

I have several ceramic (OBe) co2 laser and needs gas refilling. Lasers are
sealed.
I have constructed to several lasers using diverse proportions of N2, He and
CO2, but I know that the sealed ones usually contain some exotics gases (Xe,

I have a laser and a photodiode which Id like to place in a user
friendly box, together with reciever and driver circuitry. The issue
is that this box will be used by various colleges, and will be moved
throughout our department. At the moment I have these devices placed

I have been looking at these blades that fit into older HP plotters
for cutting vinyl for making decals. They seem neat, but for fine
detail I was thinking there would be an issue.
Then I was jokingly thinking about using a fiber couple setup to the

working with  crystals, as TeO2  e PbMoO4, I often  find a parameter called
Figure of Merit, which is defined as :  M=n^6 * p^2 / ( rho * v^3), where:
n=refraction index
p=elasto-optic coefficent

Hello all!  I've been experimenting with lasers for several years now,
and I've amassed a decent collection of galvos, gratings, dichros, and
other items needed to put on a simple laser light show.  So far I've
only done it in my basement, but that may change in the future.  With

Anyone else notice this auction?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3841325068
"SpectraPhysics 161B-460 Argon laser"  Max 200 mw, and lasing from
454nm to 676 nm?  The specs sound like a Kr/Ar whitelight tube to me,

Hello, and thanks in advance for the help. I have a brand new 2213-75
488nm JDSU laser head that really needs a power supply. A while back I
tried to use a 2212 P/S, but Steve Roberts (if I recall) explained
that I need more tube voltage than that can provide. What I need is

I would like to buy a firewire ccd camera (monochrome). The images to be
acquired are interference fringes which may have low visibility (low
contrast). In order to be able to discern the low visibility fringes, I will
need a camera with high dynamic range but this figure is ...