Search results

Does anyone have an estimate of the raw diode divergence? A quick measure of how wide the spot is with no lens at say 1m away? Any images? Is it really TEM00 at the higher currents? Thanks in advance to any of you who have done the testing on a new diode for sharing your findings.

Interestingly the pinhole can both create and remove noise around a central bright spot. Passing a collimated beam through an aperture will result in an Airy disk pattern with alternating light and dark rings surrounding the central spot due to the sharp edges of the hole. But if a beam with...

While I have not tried the masking idea personally, the idea seems sound, although it may not be the best way to get small holes. In general, you can decrease the focused spot size by decreasing the distance to the target (use a short focal length lense), decreasing the wavelength and number of...

Laser Project, I know it has been a couple of weeks. Have you had any success? Just so you know, you can make your beam expander with either a negative or positive "front" lens with hardly any difference to the overall length since you are designing for such a large expansion ratio. (the...

I have been lurking for some time now and looking through older threads for information on lenses and have come to the conclusion that starting a new thread might just prompt the kind of discussion I'm looking for regarding a "silver bullet" collimating lens solution. Forgive me if I don't make...