Recent content by matthewl

i m terribly sorry, acctually i would like to try to delete a post for some reason, but i failed, and accidently post this, though great appriciate for ur concerns.

how much is a laser

I have a

First i appologize,i dont mean to question sth, but i misunderstand or forget that they r from one pics that took on ur balcon.yea, it is a far distance and all the things matched, the star trail(about 1 degree),the mountain.Second ,u did a great job. and third, thx for sharing and discussing...

That kind of probability is scarcely if the voltage is proper.For that means the current is the operation current. It works in a normal state,but poor light emission, that the most probably reason is the diode dead. U could add my skype for more discuss. matthewliu5

Yea, quite sure.There always IR inside 532.It is not i myself who make it, and also ,as i have mentioned, i have not tested any of it yet. I have also have question marks on it. Maybe the price is fiction,maybe the power.lol

Yea, i agree with u of such a phenomenon,though i dont think that is the reason.The exposure time is not long enough to cause such a long line(in my opinion).The angle could be make out through the exposure time.And u could also check out how long of the period when record the night sky.What is...

I have to say ur diode is tenacious for being tortured so much. It is hard to make out how it died, for he cant speak any more. But u have to know this kind of diode is brittle even though it is more safe when is connected to the power circle.Maybe a finger spark or any others can kill it...

Yea,quite right, it is not DPSS anymore.It is just a kind of nonlinear transformation technology. But so far as i know, the effeciency of this kind of transformation of diode laser is very poor,how could u be so sure that it is 1064 diode to 532(KTP) but not 808 pumped 532(combination of YVO4...

it seems that u have no lens of window glass,i m not sure if u need it, under some circumstance of ur application,it is not need.

No, i think u have to take it seriously,for everything is not so absolutely.that means even if the leftover of light through ur google is 1/1000,it is still 1.5mW, it is II harm lever,i think . so do ur best to avoid that,if u want to keep ur eyesight!

Thank u very much for sharing. I see that u have a long period of exposure,anyway, the beam quality looks excellent.but the later ones show that the tripod was not fixed well,for the stars becomes a line. lol, thx

if u use it as a torch, then either power is ok. BTW, it costs not too much, a 500mW green laser torch is about 80USD here.if u need , i could help u.but u should be careful, it could easily destroy someone's eyes.

sorry to tell u that it may be probably that ur diode is dead if the laser beam divergence was not changed. The shortcut of the circuit is not likely happen for u could see the light. in case of that u could check the voltage of ur diode. but dont expect too much.