Old 01-06-2009, 10:10 PM #1
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Default problem with lens?

i lit a cigarette with my phr803! i have it set at 141mA, but i was lookin at my lens and it seems to be getting cloudy...maybe from the heat?
the only thing i can think of is getting a glass lens but doesn't that have negative effects on the power of the beam?
oh yah....i'm using a plastic lens right now, incase your wondering.
btw, does anyone know about what my laser would be pushing out at 141mA?


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Old 01-06-2009, 10:22 PM #2
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Default Re: problem with lens?

The cloudy lense could be condensation :-/
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Old 01-06-2009, 10:29 PM #3
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Default Re: problem with lens?

Glass AR lens will reduce the power of the beam by reflecting more light back onto the diode, damaging it in the long run. I think it's best to stick with the plastic for now.
I've noticed a cloudy/bubbly effect too in some plastic lenses, I've always just assumed the lens is slowly being melted by the laser.
Oh and 141ma might put you around 100-140mW, but you won't know what it is for sure unless you can measure it. PHR's seem to be unpredictable sometimes.
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Old 01-07-2009, 12:32 AM #4
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Default Re: problem with lens?

Quote:
Originally Posted by nvme
Glass AR lens will reduce the power of the beam by reflecting more light back onto the diode, damaging it in the long run. I think it's best to stick with the plastic for now.
I've noticed a cloudy/bubbly effect too in some plastic lenses, I've always just assumed the lens is slowly being melted by the laser.
Oh and 141ma might put you around 100-140mW, but you won't know what it is for sure unless you can measure it. PHR's seem to be unpredictable sometimes.
i figured it would have to be up there since i lit a cigarette with it doay, granted, i barely got it lit, and was puffing away like a madman the whole time i was burning it.
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