Natural Science Forum / Physics / Optics / September 2004

i will have to design a projector system in my lab.I have been given
a fresnel lens and an objective(projection lens).What i require is to
find the equations which give the relation b/w the focal lengths
f1,f2,f3,f4 and the distance d1,d2,d3.

I recieved this from spectronika after asking them for a quote on some
MFE's and driver boards...after waiting 3 weeks for them to get back
from their holiday i get this:-
Hi Adrian,

Any ideas how to accomplish transmissing curves
for filters/lenses 200....1500nm?
Which apparatus would be recommendet?
Thansk

It is widely accepted that, in Fourrier domain OCT, depth information
can be obtained without position scan of the reference mirror. They
can be calculted from the Fourier transform of the spectral response
of the FDOCT.

Sorry to bring this up again, but I am not clear on it.
Today we used 32,615 joules using 28,955 pulses total
for 72 minutes and 49 seconds.  Below the joule setting
the laser read 9 watts.  The laser was set at 1.5 joules

Are there any good resources for those seeking to build a titanium
sapphire laser?  Our lab is trying to restore a custom-built Ti:Sa
laser donated by another lab.  From the looks of things, it's using a
pockels cell for mode-locking.  I did search google, but did not find

Hey All..
after having the I -90 set idle for a while I decided it was time to
heat the tube up for a while to keep the pressures down ...
seems as it was sitting on the bench minding it own business, its

I would like to calibrate the color of images acquired with a digital
camera attached to a microscope. I have collected a lot of information
about color calibration and I set up a procedure, but I am having some
problems.

Recently, we tried EDS analysis of  non-carbon nanotubes (20-30 nm in
diameter) in TEM microscope (Tecnai F20).
The signals from compositional elements are very tiny in comparison with the
cupper and carbon signals, which makes perfect sense, because we used carbon

I am hopefully going to be getting a 20W sealed CO2 laser in the near
future.  I am going to be using it for laser cutting on a homebrew CNC
gantry.
I have heard several times that you can use normal goggles for eye

The Academic Homepage of Luigi d'AURIA !
http://luigi.dauria.free.fr
Mike

After reviewing ASTM regarding gloss measurement standards it appears
that measuring gloss with a gloss meter as it pertains to metals and
painted surfaces is no more than a reflectometer operating in the CIE
illuminant C mode. I realize that measuring haze or DOI is different

Does anyone have information (literature, references) on the
highest-NA systems built using reflective optics (all mirrors) only?
Thanks,
Fred

Can you tell me where I can buy (preferably in Europe) short length (~ 200
m) of SMF28 fibers. Corning tax 400$ for length less than 25km!!
Thanks in advance
Rodrigue

Im having trouble locating a low cost ir laser pointer. something
around 800 to 1000 nm, and 0.8 to 1.0 mw would be nice. did a google,
but couldnt find any 1mw or under.