Natural Science Forum / Physics / Optics / January 2008

What are the top 3 most popular surgical microscope cameras?
I am taking the poll. Please reply. Thanks.

of interest to you
http://www.research.ibm.com/journal/rd/232/ibmrd2302D.pdf
http://www.research.ibm.com/journal/rd/232/ibmrd2302B.pdf
HENEs made of parallel glass plates, and nondestructive hene

I haven't visited this group in quite some time, I settled in at
PhotonLexicon, but I've come to let everyone here know about a group
buy I am organizing on PhotonLexicon and LaserPointerForums.
The items available in the group buy are as follows:

In 2006 I first made a posting at this group announcing plans to
produce a television documentary looking at the history and uses of
lasers. I'm making this posting again, and this time urging a quick
response from anyone able to offer assistance.

in the book "Optical Shop Testing" from D. Malacara is a chapter about the
Two-Mirror Offner Compensator. Page 440 in the second edition, page 468 in
the third edition.
It seems Eta_C is the focal ratio of the mirror under test, which is defined

I live outside United States, It is illegal to bring a thermal imager
outside
the states. So I wonder where I could purchase a Thermal Imager
outside. Is it available in English, Israel or Russia commercially? Or

Hey Guys,
I have bougth a cylindrical lens. Its focal length is supposed to be
4mm with a 1% tolerance.
HOWEVER:

Researchers at Rensselaer Polytechnic Institute and Rice University have
created the darkest material ever made by man.
The material, a thin coating comprised of low-density arrays of loosely
vertically-aligned carbon nanotubes, absorbs more than 99.9 percent of

Just completed my second DIY laser.
These really are easy and fun to build.
I'm using a Sony 16x DVD burner LD. These can be reliably
pushed to between 200-300 mW output (how long they will

I've emailed you several times in reference to mirrors.
If for some reason your replies havne't gotten through my SPAM filter,
please post back here.
Thanks.

Just me here, figured i'd start a thread to swap laser stuff :o)
I have a whole lot of laser and other equipment I'm trying to get rid
of. Want to trade it for gold platinum or silver. Also interested in a
portable oscilloscope, thermal imager, hand held yellow beam laser,

I picked up a ILT 5500 series head a few weeks ago. Similar to the
Omni 543 where it uses a tube voltage in the 200v neighborhood. From
basic tests it looks like it should power up.
I picked up a Uniphase 2113 PSU off ebay for super cheap figuring I

Folks,
Besides PMMA (acrylic) and polycarbonate, what other plastic optical
materials are there that can be molded?
Thanks

I am looking for an abbe refractometer that will measure SOLID
polished samples with index in range of 1.6 to 1.85.
I am aware of liquid one's that go that high but not SOLID ones.
I am also aware of the minimum deviation method and have tried this,