There are lot, depending on your requirements. Anyway you can try: m#RJRuZ|2V "E2 0Y"[h 1, Refractive: an achromatic as positive + plano-convex as negative; :\"0jQ.y| OR -GPBX? 2, Reflective: two parabolic mirrors; lF}@@e)N Zc~7R`v7} Both of them affer nice spherical aberration performance. WC~;t4 )>FAtE Reminder: compute the laser beam density, ensure you have enough strong optical coating. S^pb9~ mv8H:T Good luck.
Hi, 4%r?(C0x a[~[lk=7 The following is a link of technical data of optical adhesives, hope it be helpful: .2@T|WD!Ah WS n>P7sY http://www.lienhe.com.cn/uvadh/NOA60.htm R|qrK )m7%cyfC Double check from your lens vendor waht type of adhesive they use for your cemented doublet. 7Fo^:" C:Rs~@tl
It is OK to use the spaced doublet design as a backup, if so, please pay a lot attention on the opto-mechanical design and assembling. U!|)M uZn_*_J! Again, good luck.