: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:
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...
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...
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.
Anyone ever seen these before?
Amazing datasheet:
About 100w, multicolour, 0,08mrad, range of 60km!!!
https://www.youtube.com/watch?v=qXe_a94TvEg
Lasershow, Lasershows, Laseranimation, Showlaser by LOBO Laser and Multimedia --*Produkte
Wonder how much they are, would be awesome to have such...
Some Pics:
Wanted to capture the moment when the match is lit on fire with a picture, but i always missed it. so i took a short vid, focus is set to infinite: https://www.youtube.com/watch?v=iscBCibPnWA&feature=youtu.be
Finally it´s working again. Output power at the moment between 1 and 1.1w. But the driver only delivers 3A to the diode. The old driver delivered 4A. The diode finally died because of a short circuit at 6A. So i know what it can take ;)
Planning to mod the second module i got with replacing some...
Hmmm... i have the following numbers:
Alumium: 2,7 g/cm3 and 897 J/(kg · K)
Copper: 8,92 g/cm3 and 385 J/(kg · K)
I mixed something up. Copper is 3,3times the weight of Aluminum.
And then we get (3,3*385)/897=1,416 times more heat capcity.
Thats exactly what you wrote. Aluminum has only 70%...