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what optics do i need to reduce the size(width) of the beam and make it thinner(like a laser pointer)
Dark_Horse said:Curiously Coherent,
I think this question deserves it own thread, (this one) IMHO.
I would like to have a thinner bean for my Blu-rays. I have read the entire thread that you have refferenced, it seams that there is a lot of good theory, and the "optics simulator" works good, but I do not believe everything that is done in this simulator is the greatest in real-life. For instance, I can achieve anything I want with only 2 lenses in the simulator, but should I actully use more, 3-5-9-? lenses for reason not apparant in the simulator, (scatter, divergance, etc.)? Also, I am not sure what the number in the simulator mean when I try to buy lenses that match my simulation, Focal-lengths, distances in MMs?
If I am not mistaken, the shorter the wave length, the thinner a beam can be with the same divergance. I believe this is why a 532/green-beam, can be so much thinner than a 650/red without horrible divergance, or is this more due to the DPSS vs. Direct-diode?
My reasoning: I want a nice, tight visible beam from my blu-rays, no focusing. Should I be using a set of 532/green lenses for my 405/Violets instead of the 650nm DX modules?
Does anyone have the lense specs for a typical 532nm/green set-up?
Any specific information regarding a practical method of "thinning", not focusing a 405nm beam would be greatly appreciated. ;D
Dark Horse
Dark_Horse said:Steve001,
Great info, thank you.
I am not looking for 0-rad divergance, just something like a 532nm/green, but in an easily availble package. I can already acheive what I am looking for on my bench, just not in a host. I am thinking of just sacrificing a cheap DX 532nm 5mW pen, ($16), and replacing the IR diode with a PS3 diode, and a new driver of course.
Thanks again,
Dark Horse
Exactly what I was trying to say, Thank you pwnstar. I understand that divergance and beam diameter tend to work against each other. I had used the example of a"0-rad" to illustrate this, but I guess I missed the mark. I want better beam specs from my blu-rays than an Aixiz module can provide, something more like we get from a 532/green laser module, that is all. Let us say a 1.5 - 2 mm dia beam with a 1m/rad diveragance. I know this is achievable, I can do it on my bench, just not yet in a host with easily available module, and yes, the beam is much more visible when condensed.Most of us understand that 0 divergence is not possible, but thinning out the beam doesn't necessarily mean he wants better divergence. I would love to have a 2mm red beam coming out of my laser. I bet the beam would be more visible if it was concentrated like that. the aixiz lens is not the only way to focus a laser; although, currently it the cheapest and easiest way.
Hemlock Mike said:I found one of my old colliminators for my NdYag. Adapted it to the S-KY 200... Now to see what it does.
Mike
OMG what a difference. By all means -- Build one. At 150 yards, the beam went from 8" to about 2" as observed from 150 yards. These work great.
pwnstar said:I would love to have a 2mm red beam coming out of my laser. I bet the beam would be more visible if it was concentrated like that. the aixiz lens is not the only way to focus a laser; although, currently it the cheapest and easiest way.
GooeyGus said:Heres a three element module from meredith. It might be worth looking into!
http://www.mi-lasers.com/cgi-bin/sh...hstart=0&template=Templates/SearchResult.html