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Old 05-03-2010, 04:20 PM #1
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Default 200mw 660nm underpower ?

it's normal that I have dificulty to see the beam in dark ? my 5mw 532nm is 2x more easy to see it :S but he can burn mach, pop ballon et burn cd case :S


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Old 05-03-2010, 04:29 PM #2
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Default Re: 200mw 660nm underpower ?

maybe your eyes are less susceptible to the red wavelengths? where did you get the laser from?

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Also, would a crap-load of evenly-wound aluminum duct tape work for heatsinking around the Aixiz module?
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Old 05-03-2010, 04:29 PM #3
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Default Re: 200mw 660nm underpower ?

It varies from eye to eye, but most people does not have big trouble seeing the beam in complete darkness. However there's a big chance that your 5mW green is way overspec. Where did you buy it?
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Old 05-03-2010, 08:39 PM #4
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Default Re: 200mw 660nm underpower ?

my 5mw on ebay and my 200mw i buy the diode on ebay and I make the driver and I put in a aixiz module
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Old 05-03-2010, 08:44 PM #5
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Default Re: 200mw 660nm underpower ?

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Originally Posted by bestrider14 View Post
my 5mw on ebay and my 200mw i buy the diode on ebay and I make the driver and I put in a aixiz module
what current on the red laser are you running it?

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Also, would a crap-load of evenly-wound aluminum duct tape work for heatsinking around the Aixiz module?
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Old 05-03-2010, 09:40 PM #6
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Default Re: 200mw 660nm underpower ?

about 340mA 3v

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Old 05-03-2010, 10:53 PM #7
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Default Re: 200mw 660nm underpower ?

Lower powered lasers are typically overpowered, so even if it was advertised as 5 mW, the power could be substantially higher. I believe that your green is probably at around 20 or 30 mW, which is why you are seeing it as so much brighter than the 200 mW. I can only faintly see the beam of a 200 mW red in darkness.

Not sure if you already know this, but this chart should explain to you which colors we see as brighter and to what extent:



As you can see, our eyes see green as being much brighter than red.
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Old 05-03-2010, 11:17 PM #8
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Default Re: 200mw 660nm underpower ?

yes i know that green or more visible but if a look on youtube whit the 200wm 660nm i can see the beam on cam and whit mine I have dificulte du see it :S

YouTube - DX 200mw RED laser. EXPERIENCE THE BEAM!!

i am far to that
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Old 05-04-2010, 12:06 AM #9
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Default Re: 200mw 660nm underpower ?

The first statement in that video is that the house is full of smoke from barbecueing. Did you try your laser with smoke or fog present? It is very easy to see the beam, even with the room lights on if you use smoke or a fog machine. If on the other hand, your house has a hepa filter, there will be no particles in the air and your laser will be nearly invisible.
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Old 05-04-2010, 12:24 AM #10
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Default Re: 200mw 660nm underpower ?

ok so it is normal to have difficulty to see it if you dont have smoke :P i can see it but its not compared to my green :P

tank you
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Old 05-04-2010, 02:58 PM #11
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Default Re: 200mw 660nm underpower ?

i could see mine nicely in pitch black with the lights off, but a little incense doesn't go a miss...

or better yet, if you have a fog machine?

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Also, would a crap-load of evenly-wound aluminum duct tape work for heatsinking around the Aixiz module?
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