Double concave lens

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Double concave lens
Posting date : Jun 18, 2010
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90-
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Specifications Material: .............................BK7, Silica, CaF2, Silicon, etc. Diameter Tolerance: .....................................+0.0, -0.1 mm tc tolerance: .......................................................±0.1mm Clear Aperture: ........................................................>85% Surface Quality: .......................................................40-20 Flatness: .....................................................N=2, △N=0.5 Centration: ....................................................±3 arc mins Size (φ): ............................................3 to 200mm or

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