Natural Science Forum / Physics / Optics / November 2004

Sam
you may wish to check this site:
http://q-optics.org/intro/index.html
There seems to be largely copied from your FAQ with no sign of any

Does anybody know a good (cheap) source for a LBO crystal for a Spectra
physics millennia 2 or 5 ?
Used is ok, as long as it is in good condition..
The size of the crystal is 20.5 by 3 by 3 millimeters..

Does anyone know of a place to purchase a collimator in the UK?
My DPSS systems produce a 3mm beam which is fractionally too large for my
scanners, so I'm wondering if I can collimate it and reduce it in size?
Chris

Version 7.58 (patch) of the extremely inexpensive optical design
program ODP
is now available for download from www.westcoastengineering.com.
For those not finacially endowed to lease CODE-V( the best optical

I am interested in people who are using the PA1-35A from Diagnostic
Instrument Inc. or a setup similar to this one. This adapter mounts on an
ISO 38mm port and has a non-compensating 2.5x photo eyepiece. It is used to
connect SLR and DSLR cameras to a microscope. (I am using a ...

I decided it was about time I dug out the SP107 and fitted the new Brewster
covers that I paid a small fortune for. Having just tested out Opticlean for
the first time last week, I decided the 107 would be the next victim ;-) I
cleaned the brewster windows and (very cautiously) the ...

i would welcome ways to create cheap effective lumia discs. i have
tried with some success various solvent and water based glues
,polystyrene in particular, on thin sheets of acetate /clear plastic.
also various patterned glass. i'm guessing something that has a

Saw this, don't know what to make of it, but probably scam or incomplete.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=26237&item=3855549818&rd=1

Does anyone know where I may be able to purchase a lasercheck at a
reasonable price, preferably in the UK, but from anywhere really ?
I am looking to obtain one for hobby use, and to help with my project, but
sadly the list price for a new one is outside my budget.

I am in a big trouble.
I am trying to make a spectrometer. But I have no knowledge on grating.
The system I am considering is as below
CCD sensor : hamamatsu 703x(1024x62 area ccd sensor)

I am looking for a company that can manufacture a tapered clad rod.
It should have an input diameter of 2mm, an output diameter of 4mm and
a length of between 40mm and 75mm.  I need a high NA at the exit
(small) end, above 0.6

We have a window on an optical instrument that is getting scratched.
It is made of BK7 ( koop hardness 520).
We've thought about using quartz.
The fused silica Koop Hardness is listed as 522 and scratches pretty

I have a parabolic collimating reflector for a lamp that radiates mostly to
the sides, so instead of a full parabola, I only need a ring reflector that
encompasses 75 to 90 degrees from forward.
It needs to be just this portion to reduce the depth of the fixture.

In anticipation of aquiring a reasonably priced used CO2 laser one of these days,
my goal being to cut .002" mylar, I just bought a couple of silicon mirrors posted
on Ebay in "like new" condition for $15 each.  I figure they might come in handy
some day for something or I can ...

The pump for the water circulation system on my arc lamp pumped yag laser
appeared to be stainless steel but when I got it apart for repairs there was
a considerable amount of green discoloration to the metal.  Apparently the
part (front housing cover) is made of brass or bronze ...