Natural Science Forum / Physics / Optics / October 2006

I know, it's a question that inspires jokes.
Recently I was browsing the web and I noticed that
there have been a few of toy bat signals produced
that shine a signal onto a wall. They seem rare

If I test an electro-optic system and measure it's spatial resolution
(using a USAF type target), how can I correct this for the distance
between the camera and the target?
For example, if I test the same system 2km away from the target or 4 km

Hi, I am having a very difficult time dealing with Coherent's
technicians, not with personalities but every one of my staff feels
that they just try to a fix our laser by trial and error rather than
true technical diagnosis.  Can anyone recommend a company that can fix

The Military Channel (DirecTV 287) ran a special called
Thunder in the Desert.  Near the end of the hour long show
they talked about the airborne laser project designed to shoot
down missiles.  The show mentioned the airplane had several

Novalux Extended Cavity Surface Emitting Laser (NECSEL)
Will these lasers produce coherant  beams of light as in the same way as
conventional lasers do

What is the difference between 30k galvos & 60k galvos ?
We all know that 60k scanners display text & graphics much better .....But
What is the difference  in manufacture  ?
Is it the  torsion bar   the windings   the feedback  loop or the ?

I acquired a large prism  made of some exotic high-index material I can not
identify. Perhaps someone can help.
Material properties (as best I can measure):
Color: medium brown (still transmits deep blue)

Can you tell me if I have the physics right?
The Ti ion produces the lasing and is a four-level laser.  The upper
lasing level is smeared across a certian energy interval by the very
least the Heisenburg uncertainty... (other effects I have heard of are

I recently bought a WILD M11 microscope on eBay
I need a manual for it, and would like to also get catalogs or
literature about accessories that wre made for it.
Original would be nice, BUT I'd be glad to get pdfs or scans

Dear Visual Media visitors,
Three major exhibitions devoted to Historical Visual Media will open in
the first half of November 2006.
'Belgium in Vue d' Optiques' will start the 9th. November in the Musée

I need to find an adapter for a coolpix 5700 to a Leitz trinoc port with a
38mm inside diameter.
Any help that's not so expensive?  This is only a hobby.
Mitchell

I am a in junior high and have an assignment to discuss how microscopes
have changed from the year 2000 to 2006.  I have found older info, and
see lots of digital and specialty microscopes, but nothing explains
since 2000, this is what has been invented and what it is capable of

I am designing an aircraft for a university project. The specification
states the aircraft needs camera capable of recording IR video, PAL
format, 10cm rsolution.
I am considering using a kind of periscope in stead of those big

After many years, am getting back into microscopy as a hobby,
now that am retired. Am delighted to see there are now digital
scopes.
I recently got an Accu-Scope 3090 digital (new model) with a

I gotten hooked on owl pellets. Yes I know I need a life. Today I was
trying a new technique and a vole skull came out almost intact. The
brain case is very fragile and any movement causes cracks and
fragmentation.