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qumefox

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It doesn't affect the brightness/visibility but it does effect burning. more power is more power, whether you can see that particular wavelength or not. And virtually all inexpensive lasers are made in china now, and their goal is to make things as cheaply as possible. If they can shave $3 off manufacturing costs, they will.

and I'm looking for the ebay seller atm but I can't find it. I thought I had it watched but it's not in the list. They were 5mm x 5mm square IR filters AR'd for 532nm and I seem to remember they were $3.

*edit * Found it.

http://cgi.ebay.com/One-piece-IR-Filter-/140442209584?pt=LH_DefaultDomain_0
 
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great! Thanks... so I suppose that the filter is one of those blue things pictured on the white background and that 808 and 1064 nm is ideal for the green laser IR blocking? Any reason anyone can think of that you couldn't make it removable? Perhaps mount it on something on the end and remove when desired?
Thanks again for taking the time to look it up on Ebay for me!
 

qumefox

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Yes, those little blue squares are the IR filters. There shouldn't really be much if any 808nm in the output, only 1064nm. And there's no reason you couldn't make the filter removable if you were so inclined. But keep in mind those are small. only 4x4mm. Which is plenty when dealing with a <2mm beam. And for best results they should be mounted at a 45 degree angle to the beam. It reduces back reflection and scatter.

And I needed to look it up anyway because I need to order a few more for myself.
 
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Yes, those little blue squares are the IR filters. There shouldn't really be much if any 808nm in the output, only 1064nm. And there's no reason you couldn't make the filter removable if you were so inclined. But keep in mind those are small. only 4x4mm. Which is plenty when dealing with a <2mm beam. And for best results they should be mounted at a 45 degree angle to the beam. It reduces back reflection and scatter.

And I needed to look it up anyway because I need to order a few more for myself.
wow those are cheap! ill have to buy a couple for my greens now
 

AUTO XX

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I think there is only one general solution to protecting against ALL wavelengths: 2 pieces of 2"X3" duct tape placed securely over both eyes.
NOTE: Duct tape will not protect for very long under direct exposure to laser beam, 2"X2" plate steel and crazy glue will offer additional protection.
 
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I think there is only one general solution to protecting against ALL wavelengths: 2 pieces of 2"X3" duct tape placed securely over both eyes.
NOTE: Duct tape will not protect for very long under direct exposure to laser beam, 2"X2" plate steel and crazy glue will offer additional protection.
could you please tell me of the OD of these products? :D
 

ShaOwned

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Just use the laser outside only, and shoot it either into the sky or at objects not in your immediate vicinity. That's all the fun of "viewing" a laser right there.

If you want to get a laser for burning, most people won't get a 200mW green but rather a laser costing $200 or more, so dishing out some for goggles isn't unreasonable.

Oemlasersystems offers good protection in the $100 range.
 
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I just want the laser to do some amateur experiments... the same reason I hawked ebay until I could find myself a good microscope ( I paid $500 for a Nikon Smz-2t worth close to $8k new woohoo!)... I will proceed carfeully, that's for sure. I'm scared for people that are less inclined to be mature about the use of such a potentially dangerous tool. I haven't seen enough about the potential dangers of these devices in the main stream.
Are there any stories on here about people from here on the forum losing vision?
 

chipdouglas

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So your eyes are worth less than $200?

before you get sarcastic with ppl try realizing what he actully said. he said... thats expensive, so i should cancel my order. that means he was not going to get a laser at all.



michael
 
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Thanks. I'm trying to be a good noob , doing all my HW and being respectful before asking questions in Faq's and on other threads but I think we can all relate to being excited about something new and not wanting to spend literally DAYS mining every scrap of data from the forums.
That being said, I'd like to contribute here with some genuinely educational amateur experiments - I hope to speak with some of my colleagues in the science department to devise some worthwhile experiments using ≤ 150mW green laser. Hope to be posting some stuff in September.
 

chipdouglas

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also, if you don't plan on lighting a match or poping a balloon you can probably get away with a cheap less powerful laser.

i recommend www.ledshoppe.com i got 50mw there. and it has a beautiful green beam at night. also it was only 24 bucks.
 

TheRunner

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before you get sarcastic with ppl try realizing what he actully said. he said... thats expensive, so i should cancel my order. that means he was not going to get a laser at all.



michael
I completely agree. Sarcasm gets annoying, not just on this forum, but everywhere.

About your question... What experiments? You seem pretty scientific, so you must have at least an idea. I cant really help you unless you give me more info.
 
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heh nice. The Ledshoppe 50mW, got it... it's more like 10mW. Blechh. I emailed them 3 times over the past week about it -politely- and got zero response.

The experiments in question I want to design would be to study the nature of light using the laser. Not really sure what I want to do yet, trying to find something that would be valuable/useful but it seems that's a running joke... pointers in particular are really just expensive toys without much practical value. Not that there is anything wrong with expensive toys!
 

qumefox

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About the only 'real' use for a relatively high powered pointer is 'group astronomy'. That is. pointing out to other people what your looking at in the sky. Most other experiments are better done with a labby that's rigidly mounted to a stable beam table where the beam is always able to be precisely controlled.

If your interested in a low priced high powered labby, read this thread.

http://laserpointerforums.com/f52/200mw-green-125-shipped-50812.html

It will need an IR filter, but so far all the ones discussed in the thread have been overspec.
 

TheRunner

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Yea... I would also get a labby. Better duty cycle, more mW per dollar, stuff like that. Ledshoppe, to me, has always been.... sketchy.

Do you plan on burning??
 




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