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Bi concave lens
Model: as drawing
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Material:BK7,UV-grade fused silica
Size:3mm-220mm
Thinkness Tolerance:±0.2mm
Centration:3 arc min
Surface figure:1/4?
Surface quality:60 - 40scratch and dig
Clear aperture:90%
Coating:avaliable upon request |
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Changchun Ji Xiang Optoelectronic Co., Ltd
They have a negative focal length, is used to diverge a parallel light beam.
Material:BK7,UV-grade fused silica
Size:3mm-220mm
Thinkness Tolerance:±0.1mm
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