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Old 07-07-2010, 06:36 PM #1
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Default Fixing my 532nm ~500mW O-like

I got this laser a few months back. Within a few days the particular damage was unknowingly sustained (more explaination further down)

This is the laser as on O-likes site: High power 550mW New portable Green laser torch/IR filtered [OLNGL550] - $675.00 : Welcome to O-Like.com, Your source for laser products

The switch has been broken since I got it. Until a few days ago it was constantly on, now it changes randomly. Looking inside the battery part seems to indicate that the bit the switch uses for contact with the battery has seperated from the main part you press down. For the most part its ok since I can just use the key to turn it off and on.

The problem this post is about is the amount of scatter around the beam and what I think it is caused by. Here is a shot of the dot.

Note my camera isnt great, and it is actually quite a small dot. You can see, though, that the scatter can be blocked before it reaches the wall, and so isnt just a splash effect from the point the dot contacts the wall.

Since this splash has occured, the ability of the laser to burn has been reduced dramatically.

The laser:


Taking the top off reveals what I assume to be a lense that contributes to beam correction. from what I can see its fine.


Taking that off reveals a lense (originaly, when I didnt know much about lasers, I thought this was the diode. Then, doing some reading, I realised green lasers dont have diodes lol, at least not infront of the crystals). I think the source of the scatter is a very small speck of something on the lense. It seems resistant to cleaning and so is probably structural.

It is encased quite thickly with superglue in parts.

My main areas I would like advice are:
Does anyone know the model of that lense so that I can get a replacement? It would also help if someone knew where I could get the replacement as im sure laser lenses are somewhat more esoteric a topic than the pointers themselves.

How about getting the superglue off?

Are there any other things I should take into consideration in removing and replacing the lense?

Thanks for any advice!


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Just starting off my collection. Currently have:
150mW 405nm from O-like *outputting 156mW quite stable*
Jayrob SS 18650 kit, A140 diode at 1A putting out 900mW
100mW 532nm from dealextreme *broke*
500mW 532nm from O-like *lense dmg? down to 150mW with scatter*

200mW waterproof 650nm from O-like *outputting 210mW quite stable*
Plan to have soon:
1W 455nm from wicked lasers (ofc)

01010000011000010111001101110100011000010010000001 10111000100000011100110110000101110101011000110110 01010011101000100000011010010111010001110011001000 00011000010110110101100010011010010110011101110101 01101111011101010111001100100001
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Old 07-07-2010, 06:48 PM #2
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Default Re: Fixing my 532nm ~500mW O-like

Superglue is BAD for optics, it's not superglue unless you put it there. More likely another type. The symptoms you describe are a fail(ing)/(ed) tail switch and probably a misaligned crystal too (if the speckle is very wide, affected by heat, and unaffected by cleaning of the front (final) lens (lint-free cloth, rubbing alcohol). You can't replace the crystal set because they require precise alignment/tuning. Speak to O-Like and get it fixed under warranty if you can.
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Last edited by charliebruce; 07-07-2010 at 06:50 PM.
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Old 07-07-2010, 07:27 PM #3
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Default Re: Fixing my 532nm ~500mW O-like

the tail cap must be fine since the keyswitch is functional

as i mentioned, I can see a little speck of something on the innermost lense. viewing it on with laser glasses shows it does indeed get in the way of the beam. while i call it a speck, it more probably is some sort of crack or a patch where the lense coating has come away. it could be the crystals, but this seems more likely since i can actually see a sign of it having occurred
__________________
Just starting off my collection. Currently have:
150mW 405nm from O-like *outputting 156mW quite stable*
Jayrob SS 18650 kit, A140 diode at 1A putting out 900mW
100mW 532nm from dealextreme *broke*
500mW 532nm from O-like *lense dmg? down to 150mW with scatter*

200mW waterproof 650nm from O-like *outputting 210mW quite stable*
Plan to have soon:
1W 455nm from wicked lasers (ofc)

01010000011000010111001101110100011000010010000001 10111000100000011100110110000101110101011000110110 01010011101000100000011010010111010001110011001000 00011000010110110101100010011010010110011101110101 01101111011101010111001100100001
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