Physics - Optics

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Thread	Last Post	Replies

Oscilating power, why?	31 May 2008 16:02 GMT	5
I'd like to know how power fluctuation can occur when the laser is in constant current mode. I've measured the diode current and it is really constant, even the IR power with a power meter is not fluctuating much.
laser - daylight visible?	31 May 2008 03:17 GMT	1
Need to locate a couple of inexpensive, simple lasers that can be viewed during daylight. Are there visible lasers that can be viewed with special glasses during daylight hours?
Nikon Diaphot 35mm camera mount = Nikon F?	30 May 2008 18:57 GMT	2
The Nikon Diaphot inverted tissue microscope: http://micro.magnet.fsu.edu/primer/museum/diaphot.html Is the 35mm camera port on the lower part of this a standard Nikon F lens mount? Which would make it compatible directly with current Nikon digital
Application of 1.3um	28 May 2008 16:01 GMT	4
There are other applications of 1.3um than trasmission in optic fiber? any resource,info? thanks
Ebay auction of the week: BLUE VIOLET LASER DIODES?!	28 May 2008 01:15 GMT	4
NEW PRINCETON LIGHTWAVE LASER DIODE VIOLET BLUE 4-PIN Turns out they are actually IR transceiver diodes, not blue at all! Buyer beware!
WANTED: Melles Griot 05-LHR-633 HeNe	28 May 2008 00:06 GMT	1
WANTED: Melles Griot 05-LHR-633 HeNe Please contact me if you have this HeNe laser available. Thanks, Glenn
ampliftude and phase fluctuations of output pulse from pulsed laser	27 May 2008 20:57 GMT	7
I am trying to find some information about measurement method to characterize amplitude and time jitters of optical pulse from pulsed laser. optical pulse ~ ps
How to make a low-precision ellipsoid?	25 May 2008 14:51 GMT	4
Sorry for the maybe humble question (and the English) ... Do you know any method for constructing an ellipsoid of a rotational ellipse with an eccentricity of (hope I pointed out well) 0.166? Many thanks.
Rubber foil for focus ring of objective	23 May 2008 22:39 GMT	8
I'm looking for self-adhesive rubber foil which can be glued on the focus ring of an objective. I mean this foil which has small 4-sided pyramids on its surface, about 1.5 - 2.0mm wide. Does anyone know a supplier?
Semi-telecentric wide angle objective lens	23 May 2008 21:22 GMT	5
Where can I get an objective, off the shelf, with focal length ~10 mm, at least f/1.5, but better f/1.1, covering a field of view of 17 degrees (total) and approximately telecentric at the image (diameter 3.1 mm)? Wavelength is 0.9 microns, environment is outdoors.
optical spectrum analyzer in zero span mode	23 May 2008 20:59 GMT	3
Dear group members, I would like to have few hints on how an OSA behaves when set in zero span mode. I try to display the received power from a laser diode directly modulated at 100Hz with a square wave (i.e. the laser is
KODAK GEMS - Request for technical information, optical design, etc	23 May 2008 19:29 GMT	1
We've been asked about doing something with this technology but there does not seem to be much information. Does anyone have any detailed technical information? TIA
Import eyepiece manufacturer ID	23 May 2008 12:32 GMT	1
Can anyone identify who makes these import eyepieces? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120261597629
Acute angle projection (variable/stretched focal point?)	21 May 2008 21:38 GMT	14
I'm a product design engineer and I'm here today because I'm stumped by an optics problem, and I hope that someone with more experience can help me out. I'm currently trying to educate myself on what practical options are
Simple Low drop out laser diode driver.	21 May 2008 17:48 GMT	9
I'm converting one of those LED illuminating bases used to illuminate laser engraved crystal ornaments and so on. I want to replace the LEDs with a few milliwatt 635nM laser diode(s) without collimating optics and running from the 3 AA batteries it takes. I'd planned to use a ...