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- Feb 5, 2008
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Dude,hello silvershoot..... mmhh if a person would but this laser..... shoud ask for the albert laser(without led) or your laser with led? i remember albert's laser is measured 220mw with ir...amd peak at 250mw. and has 160mw true green.... is it true albert?
AH...silver... in your photo i see "momentary button"... so is it like a pen laser? i don't know if the alnert's laser is click on/off or momentary on like your....(i prefer momentary)
however.... i am a bit mad.. but i will ask for the 20 times the mase thing on this forum XD.... WHY a focusable laser can only get 2mrad? ...i can't explain it!.... every focusable laser... when switch from focus point..to a parallel beam... has MATHEMATICALLY a little moment/point when it is near 0mrad... or 0.3... or 0.5....
do you understand my meaning? if the light converge to a point.. and then the lense change the focus... you MUST have a sensible hand to block the focus ring at he moment it give a "perfect" beam..(ok.. not teorically 0mrad.. but at least 0.5mrad yes...or 0.8 if you are bad lucked)
i am looking for 4 good burning green laser... power betweeen 150/200mw...
i don't tknow if buy an optotronics 150pen.. that hase the SAME power of your laser...(albert unit is a good unit and only have 160mw true green... and opto pen have 160mw...so the power is the same... but with opto you get 1.2mrad..and a LITTLE laser to bring with you everywhere....
i can't decide XD rayfoss give focus system.. to burn at distance.. but if the BEST divergence is about 2mrad... i don't like it..
SUGGESTION: use a binocular and see at a wall at about 200/300 meter. ...then turn VERY SLOW the focus ring on the laser.. and see the moment in which it has the smallest dot. and compare it with another true 1.3/1.5mrad laser pen (generally lower powered laser have this divergence)..... if the dot is smaller that it... you can say to have a lower than 1mrad laser
first: try to construct sentences! typing a bunch of words seperated by '.....' is not quite readable.
Second: you need to understand how optics work. Focusing a perfect parralel beam would only be possible if the surface that emmits the light is infinetly small.
In lasers, that surface is not infinitely small because that is impossible.
That makes it , MATHEMATICALLY as you said , impossible to focus to infinity.
The Nd:YAG + KTP conversion method of getting green light is where you need to invest most of! If the making process is of higher quality and crystals are alligned for optimum lasing efficency, then you will have a nice green beam with ~ 1 mRad divergence, the smallest possible with green lasers.