Natural Science Forum / Physics / Optics / October 2004

Anyone have any experience with these guys? http://www.lasershow.sk/lsp.php
You can download a demo, just been looking at it and seems pretty
comprehensive, just wondered if anyone else had used this or would
recommend??

I need to choose between a photodiode and a phototransistor. Does
anyone has some tips on average resolution and limit of detection of
those devices ?
Thanks,

I need to buy some safety goggles for an argon laser.  What is a good source
for these?
Thanks,
Bob

Fully supporting idea of the new group. spm-digest is censored !
best regards,
Andrew.

Just wondering if anyone knew of a source high powered green laser
pens(pointers) such as 100 mw or more.
Thanks,Jerry

Looking for suggestion for a 5W or greater DPSS.  Anyone have any
advise.  It will be use for a display application with graphics and
prefer that it be internally modulated for blanking.
Also for another job any suggestions around 2W.

We use a Bragg cell to frequency shift a beam by 40 MHz. The efficiency is
rather high with >90%. We observe a parasitic 80MHz AM on the shifted beam
no matter if the cell is driven with a very pure sine or nearly square wave.
Where does this AM originate from and what can we do ...

My (rapidly fading) memory bank says that once upon a time there were
non-ink, non-carbon, thermal-type overhead transparencies that were
prepared by putting the transparent plastic transparency sheet on top of
the document to be copied and running both of these through a pair of ...

To all,
I'm looking for some help with my fibre optic cable selection.
Any help regarding what advantages each one has over the other would
be greatly appreciated.

     Hand-held Laser Power Meter:
     Ihave a 6 month old laser power meter for sale - $250 shipped within
USA
     E-mail me for photos or more information.

Just picked up my used 25W Synrad CO2 laser today and what a lovely
thing it is too.  Already made a brick glow and taken a mode print in
perspex but some finer control before going to full CNC would be nice.
The Synrad needs a 5khz PWM signal with a minium pulse length of 1us

Is there any museum in Europe where I can find a goniometer of
Babinet?  And how big is such goniometer (I mean: can I hold it in my
hand or is ist bigger)?

I have to get a old controllaser working again. The problem is that it used
to be connected to a production line.
On the back of the lasercontroller is a interface plug. It is next to the
water inlet. I don't have a connection diagram for

Can anyone point me at anyone who sells these in quantity?
Or alternatively, frensel lenses from stock in large quantities?
(say 10cm focal length, 5cm square)

I have 3, small MCA (monolithic crystal assemblies) low power, 100mW output
max KTP/NdYV04 crystal assemblies, 2 with holders for 808nm laser diodes
(frequency doubling) Each unit was pulled from a working DPSS module. Photos
upon request, asking $150 for the 3. I have a 500mW ...