Recent content by numquamretro

:tired: Had that discussion too many times before. You can search for my build, it is without IR and my Ophir LPM is on :na: https://www.youtube.com/watch?v=dYF83gQvrAQ https://www.youtube.com/watch?v=NnrtNb7nfhU :beer:

I was talking about the balloons, thats why i said divergence...

Try to beat my record with that 520: https://www.youtube.com/watch?v=13aNFKO4wBI Then you´ll see the difference when it comes to divergence ;)

oh, ok. then i should be satisfied i guess:can::D:D

Cool, then it should be fine. Can´t see any marks :) Thanks

Hi guys! Today i wanted to measure the power consumption of my beam expander and forgot to check the focus of the laser when measuring the power with my 20C ophir head. I hit it with a realy small spot (~1W@532) for about 5 seconds. How good are the chances that it is damaged now? I can´t tell...

One more thing, the beamexpander decreases outputpower by 20%, just measured it with my ophir LPM. So not very efficient.

Today i tried some longe range shots. Camera is zoomed in at max. First one is 1km into the trees: This one is my personal goal. Antenna on a mountain, distance 12km: The beam is too bright to tell if it actually hits the antenna. I need to wait for a more clear night and increase the angle...

Thanks! Yes, thats exactly what i used. Fits perfectly with a tight hold.

It´s hard to tell the difference in the pics, but it´s definately improving divergence. The beam without expander is very good anyways (~1mrad), but with it´s even better. Without expander: With expander:

I followed this tutorial:http://laserpointerforums.com/f49/super-cheap-beam-expander-86604.html I´ll make some pics for comparison later when it´s dark outside. I´m pretty satisfied with this built. I truly can recomend it.

Beamexpander on 1W+ green handheld. Costs for parts: <20$ Close shot, distance about 1km.

Thanks:beer:

Some long range shots:

lol:D