It used to Converge parallel light, or make light source into parallel light .
Material:BK7,UV-grade fused silica
Size:3mm-220mm
Thinkness Tolerance:±0.1mm
Centration:3 arc min
Surface figure:1/4λ
Surface quality:60—40scratch and dig
Clear aperture:90%
Coating:avaliable upon request
Post by Yan Zhang Electronic Components & Supplies @2011-12-20 16:24:33