Natural Science Forum / Physics / Optics / October 2007

As a part of a project I need to design a 3v (or 4V) 50A power
supply. This power supply will be part of a diode laser. Can Anybody
help me out. Any references?
Thanks in Advance

Does anyone rememebr these? IIRC there were a row of
3 pointing along Regent Street in London during an
80's Xmas.
I'd like to know what power was used.

Does anyone make an articulating arm that we could use to orient a fiber
scope into a fiber adapter, leaving the human operator's hands free to work
with software that analyzes the image?
The product we are using is the Westover USB fiberscope, and it works with

I suppose here are some people working with ZEMAX. Can somebody recommand a
goog ebook,book or tutorial for ZEMAX except for the knowledge base on their
web site?
Greetings, Florian

Any information on modern lense production techniques would be appreciated.
The most comprehensive information I have found so far is the books "Amature
Telescope Making", but the information is quite old. I expect there have
been major advances in the tehniques since the 50's.  ...

Here in the UK Tesco sell some super-cheap own-brand binoculars for
about £10.  I know they're fairly crap but that's ok.
I think they have a magnification of 12x.
Does anyone know the other figure which I believe is the objective lens

Anyone have one in electronic form that is readable and they would be
willing to send?

I have an opportunity of buying either a Zeiss Universal or a Leitz
Othoplan.
Which one would you buy and why?
I have been searching for information for both scopes and have found

Been after one of these for ages and last night a batch of
18 have appeared on ebay! These are huge optical grade
prisms at 6 inces tall and are old ones from 1920's. I'd
grab one fast if you want it. I paid $42 for mine which is

Yes, I know, it's for metallurgy! But how do the optical properties of
these objectives differ from normal brightfield ones? How might they
be expected to perform for biological applications, for example?

I'm trying to identify an optical device, if you have a minute please take a
look at the photos here:
http://img.photobucket.com/albums/v80/harnett65/album%207/_optic2.jpg
http://img.photobucket.com/albums/v80/harnett65/album%207/_optic3.jpg

Is it possible to make holes of 2um diameter into a AgClBr fiber? Could you
sugggest me an article where I can find how to do that?

Does anyone know where I can get a cheap supply of small lenses? My needs
are about 6mm to 8mm, bout f1.5.  I need thousands of them real cheap, glass
or plastic.  Please help!!!

I'm working on a very simple optical design containing one lens (1 glass
(such as N-BK10 for exemple)) at different temperatures.
I'm just trying to calculate the optical index values of the glass using
Sellmeier equation and its derivative according to the temperature.

how would be the usual supects to aks for a laser marking setup?
The target would be silicon wafers (match box size) and just a bar code on
them. Required throughput is less than 1000 per day, so that shouldn't be
a problem.