There are lot, depending on your requirements. Anyway you can try: *%[L
@WF V^v?;f? 1, Refractive: an achromatic as positive + plano-convex as negative; .(RX;.lw OR 5:oteNc3 2, Reflective: two parabolic mirrors; E<
57d,3l OA_WjTwDs Both of them affer nice spherical aberration performance. ?h7,q*rxk *OX;ZQg0 Reminder: compute the laser beam density, ensure you have enough strong optical coating. 4[&L<D6h DlD;rL= Good luck.
Hi, w1N-`S: ?Dr_WFNjO The following is a link of technical data of optical adhesives, hope it be helpful:
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_Cc+}W http://www.lienhe.com.cn/uvadh/NOA60.htm s)eU^4m /'g/yBY Double check from your lens vendor waht type of adhesive they use for your cemented doublet. 3|Vh[iAa\ v
7g? 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. x2 _?B[z :m{;<LRV Again, good luck.