Optical Lens Selection for 612nm Laser Source

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To set up an optical lens system for a 612nm laser source, it is essential to ensure the lens can effectively focus the diffraction pattern from a crystal onto a CCD while minimizing aberrations and distortions. The proposed configuration includes using a spatial filter and non-reflective glass before the lens. The discussion highlights the need for clarity in terminology and guidance on lens selection due to the complexity of optics. A reflecting ellipsoid has been suggested as a potential solution, prompting a request for setup advice. Proper lens choice and configuration are crucial for achieving optimal performance in this application.
csocean
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Hi,

I'm trying to set up a lens system as follows:

- Laser source 612nm
- This passes through an apature to act as a spatial filter...
- then through non-reflective glass onto a crystal of diameter upto 150um
- the lens must then take the diffraction pattern from this crystal upto 50 degrees from the optical axis and focus onto a 7x9mm CCD

I have looked though a couple of catalouges and spoken to some people, but I keep having different terminology and jargon thown at me, and since my optics understanding is limited, I was hoping someone might guide me into how to make the right choice of lens. How do I minimise the abberations/distortions/other possible elements of error!

Thanks!
 
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Ok, now I've been presented with the idea of using a reflecting ellipsoid... can anyone give me some pointers on how to set it up?
 
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