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Need help finding quartz optics...

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So, after destroying over 20 plastic lens trying to collimate my UV laser, I'm finally convinced that I need proper optics. I'm looking specifically for uncoated quartz lenses that are approximately 1" diameter. I have searched fleabay but most of the lenses are AR coated for specific wavelengths. Could anyone recommend a good source for these lenses?

thanks
 

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Why won't glass lenses work?
I've found that glass reflects or absorbs alot of the UV. Even plastic lenses transmit better than glass; only problem with plastic is the degradation due to the UV and q-switching. I have tried a quartz/silica lens before and it works much better.
 

HIMNL9

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UV laser ..... some types of glass block part of the UV band, some other fluoresce ..... you need optic crystal, not sure that quartz works, at least if is not a specific lens made for that use, but in this case, i think it can be all except cheap .....

some producers have also low-volume distribution ..... as example, you can try to ask producers like ROCOES via email ..... Dichroic filter, Glass filter, Lens, Glass, - ROCOES co., ltd. ..... asking cost nothing, after all :D
 

scopeguy20

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Have you tried concave mirrors? I know that some quartz is made for UV and some isn't. Also natural quartz is sometimes made into lenses, I can check my old optical sources, but I need to, at a minimum know three things, what diameter lens is needed, what focal length is needed and what wave length or (wave lengths if more than one). Otherwise, it's a complete shot in the dark if a lens would be much help. -Glenn
 
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I am using the lens to improve the divergence of my 355nm unit (dot is about 8" at 35 feet). I want a lens about 1" dia with a FL at about 12mm. I have checked edmund optics and they don't seem to have anything that meets my specs; not to mention, they're pretty expensive...
 




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