Alex2893
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- Jun 6, 2014
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So today i received 4 ebay 303 green lasers that were $5.99 each if you bought 2 or more. I figured what the hell. I have a 301 laser that iv had foe 2 years and its still peaking around 96mw but only on the first lpm test. once its warmed up it will peak in the 80s.
anyway i took all 4 303 lasers and compared them to my 301 and 3 of them were just as bright as the 301 so i figured these were 80+ mw
but then i lpmed then and i was:cryyy:They all measured from 20-55 mw and no more.
so how can a 55 mw laser be just as bright as a 80+ mw laser.
infrared leak !!! so i took my laser goggles and blocked the beam of the laser that hit the lpm. sure enough the first time i did this with the 301 laser i got 23mw of IR. no green was hitting the sensor. then i did the same with all 4 303 lasers and i got no IR leak at all so my 80mw 301 laser is more like 55-65 which explains why the beams and dot look the same in terms of brightness.
all my lpm graphs peak output for all the tests are a bit low because i really ran them hard before because i had a hell of a time setting up my lpm graphing on my new laptop. so they were a bit warm and actually laser #1 broke. the black plastic piece that holds the circuit board in place fell out and the button bent the floating board down and it hit the side of the laser and i guess shorted it. it did 50mw when i opened package and now it does 4mw.
good news the others are still going strong after many 2 minute runs.
Here are the lpm graphs. half way through the Graph i put the laser goggles in from of the beam so only IR could get through.
Not sure if this test is 100% accurate but if it is then these 303 lasers have no IR leak which is nice to see. I see no IR filter in any of the lasers
Capture 4 by Alex Littig, on Flickr
ebay 303 #1 2015-12-13 21.05.43 by Alex Littig, on Flickr
Capture by Alex Littig, on Flickr
capture 2 by Alex Littig, on Flickr
Capture 3 by Alex Littig, on Flickr
20151213_225137 by Alex Littig, on Flickr
20151213_225936 by Alex Littig, on Flickr
anyway i took all 4 303 lasers and compared them to my 301 and 3 of them were just as bright as the 301 so i figured these were 80+ mw
but then i lpmed then and i was:cryyy:They all measured from 20-55 mw and no more. so how can a 55 mw laser be just as bright as a 80+ mw laser.
infrared leak !!! so i took my laser goggles and blocked the beam of the laser that hit the lpm. sure enough the first time i did this with the 301 laser i got 23mw of IR. no green was hitting the sensor. then i did the same with all 4 303 lasers and i got no IR leak at all
so my 80mw 301 laser is more like 55-65 which explains why the beams and dot look the same in terms of brightness.all my lpm graphs peak output for all the tests are a bit low because i really ran them hard before because i had a hell of a time setting up my lpm graphing on my new laptop. so they were a bit warm and actually laser #1 broke. the black plastic piece that holds the circuit board in place fell out and the button bent the floating board down and it hit the side of the laser and i guess shorted it. it did 50mw when i opened package and now it does 4mw.
good news the others are still going strong after many 2 minute runs.
Here are the lpm graphs. half way through the Graph i put the laser goggles in from of the beam so only IR could get through.
Not sure if this test is 100% accurate but if it is then these 303 lasers have no IR leak which is nice to see. I see no IR filter in any of the lasers
Capture 4 by Alex Littig, on Flickrebay 303 #1 2015-12-13 21.05.43 by Alex Littig, on FlickrCapture by Alex Littig, on Flickrcapture 2 by Alex Littig, on FlickrCapture 3 by Alex Littig, on Flickr20151213_225137 by Alex Littig, on Flickr20151213_225936 by Alex Littig, on Flickr
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