Natural Science Forum / Physics / Optics / December 2005

The search for a cheap bypass to high-end dedicated microscope cameras
is understanable, however,  people might appreciate seeing these
images.
Here are four routine brightfield images taken with a Zeiss Axiocam

I salvaged this lithosetter engin. It uses a 25Watt laser bar that is
modulated with presumably an AOM.
Between the AOM and the projection lenses there is a thermo-electrically
cooled optical component that can rotate at high speed. It is obviously not

Anyone has experiences of measuring intensity noise (IN) of fs laser?
I am now try to measure IN of a mode lock fs laser and IN after
supercomtinuum generation (SGC). I used a si PD from Newfocus with 125M
bandwidth and set it directly face to lthe aser. The DC was monitored

I have a Nikon SMZ-10 zoom binocular microscope and need one of the
screw on auxilliary lenses for the objective. Used to have one and have
misplaced it somewhere. Anyone out there have one, or know where I
might get a reasonable substitute?

I need an accurate sensor to measure shiny foil deflection in a
machine. I have used Keyence sensors in the past and they seem to cope
well with the shiny surface but are pricey. Ideally I want something at
less than £500  - $750. The sensing range is about 3mm at a distance

I seek any kind of information relating to the relation posture
vision.
I am French thus if you have French information it is still
better!

Hello all;
Long-time lurker here.  I've been thinking about buying one of the
Alphalite XC Pro units, and I'm wondering if anyone here can comment on
their reliability, ease of use, etc.  (I've already posted to the yahoo

Hallo, I bought an Innova 300 laser unfortunately without the origian
digital remote controller.
Is there a way to control the laser through the rs232 port? As for
example with a pc program or something like it?? Thank you!!

Yes! Look at the diagram I've added to the bottom of my page at
http://home.ecn.ab.ca/~jsavard/other/cfaint.htm
Viewed through a polarizer and analyzer that are crossed, a wedge of
birefringent material shows color bands that get more and more

how strong microscope should i have i want to se spermatozoids (sperms)?
thx
one sperm is 0,0005 mm...

1-Why in daylight cat needs a vertical (vertical slit) pupil?
2-Similarly, why octapus needs horizontal pupil? It is said that it is
for better viewing of the horizontal ocean floor, how does this work if
that is the case?

Dear microscopist,
I think i have a relatively simple problem for the experts in
optical microscopy.
I'm looking at indentation in hard ceramics [opaque material] using

Anyone know what the minimum lasing frequency for 635-640 nm LDs is,
based on temperature?
I've got a few pointers based on the SDL-7501 LDs (~15 mW @ 635-640 nm)
I notice the rated frequency is @ 25C.

When constructing a Galilean beam expander what is the correct
orientation of the PCV lens, curved side facing in or out? I read that
the PCV lens should be smaller than the PCX. Is that a writ in stone
rule or can the PCV be the same size as the PCX lens?

When constructing a Galilean beam expander what is the correct
orientation of the PCV lens, curved side facing in or out? I read that
the PCV lens should be smaller than the PCX. Is that a writ in stone
rule or can the PCV be the same size as the PCX lens? Thanks Steve