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Old 03-02-2008, 08:06 PM #1
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Default retro-reflection

I was wondering if any of you had information on how lasers react to retro-reflection. Do the beaded surfaces cut down temperature on the target area, and at what ratio. I cant seem to find( or I am too lazy to really look for) any research in the area and I am curious.


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Old 03-02-2008, 08:13 PM #2
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Default Re: retro-reflection

This question is a little unclear, what do you mean by retro reflection and what are you trying to do.
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Old 03-02-2008, 08:13 PM #3
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Default Re: retro-reflection

what is retro-reflection?
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Old 03-04-2008, 03:55 PM #4
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Default Re: retro-reflection

Retro-reflection occurs when light is reflected along the vector it was sent but opposite the direction it came. Unlike a mirror which reflect at a vector opposite at its own. A retro reflector will always return light the exact way it came. This is best done with beaded surfaces, using clear beads. My question how would this effect a lasing medium? I know some lasers have limiters on them to prevent a higher wattage with a laser beam sent back into the medium it might increase saturation and make a stronger beam(although useless because you cant change the direction). And my second question is would retro reflection act as a “shield” diverting the energy of a beam from the target back into the laser, and how much of the energy is diverted.

Hope that makes things clear, I didnt have much sleep when I made my last post.
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Old 03-04-2008, 05:23 PM #5
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Default Re: retro-reflection

You better ask that question over att photonlexicon.com where the big boys hang...
I know that DPSS lasers are more insensitive than diode lasers, there are numerous people on photonlexicon that have killed high power reds with the reflections from the PBS combining cube.
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Old 03-04-2008, 09:27 PM #6
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Default Re: retro-reflection

Quote:
Originally Posted by Pinged
I was wondering if any of you had information on how lasers react to retro-reflection. Do the beaded surfaces cut down temperature on the target area, and at what ratio. I cant seem to find( or I am too lazy to really look for) any research in the area and I am curious.
i know what you're talking about.

but as far as i know if u shine a laser onto a retro-reflecting surface it will send the light back, but IMO it wont lower the temperature as it is just REFLECTING light, maybe because of the impure material it can absorb some (even light) but i dont think it is a major loss..
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Old 03-05-2008, 01:06 AM #7
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Default Re: retro-reflection

Got you, thanks for the info.
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