Recent content by nc9210

Is this item save? 808nm 810nm laser safety goggles /CE pass bei eBay.de: Lighting Effects (endet 07.03.10 09:22:00 MEZ) thank you for your help Nicole

this diagram shows the possibilities: (If not allowed to post pictures i will delete it immediately) I've just tested a " 3x video tele attachment" with a really good result (5mm and sharp). But the beam was not expanded, only summarized. The next days i check this item at a long distanceand...

OK, i begin to understand. And now (i read the laserglow pages) i know that the used laser is a DPSS type. The beam expander used in he video is not shown at laserglow. Is this a prototype? As shown at laserglow a beam expander available from stock is aplicable for low distances only. I think...

The black 1,2m long part is a beam expander??? Sorry, i have never seen a device in this size. Or do you mean the optics mounted on the laser? This, of course may bee. :banghead: What do you mean with wtf? And whats the problem with Fiber-bound lasers?

@lasersbee Do you know a lens with a very high focal length? @Arayan Thank you for showing me the difference. If i expand the beam first and then focus for a long distance it will reduce uniformly and divergate again behind the focus. Ist this right? This looks like my experiment with the 2...

@cmak thx why? i read nearly all threads from the last 12 months in this forum and learned a lot, but nowhere i found a post about long distance. Are you really sure? To expand the beam is one part, but the expanded beam continues divergating. To focus the expanded beam i need a lens with...

I always thought laser beams would be completely parallel; but obviously this is not true. My laser pointer does have a point after 10 meters with 15mm diameter. After 100 meters this is already 15cm! I just like to know whether it's possible to held the beam constant at a considerable distance...

Hi @all, is it possible to focus a beam over a distance of 100m and more? If yes, what is requiered to do so? regards Nicole

Hi HMike, i have the same idea as you with this diode. Dou you have news? What's the result using the 1" and 5" lenses? I'm interested to know all above your experience... Thanks in advance Nicole