Meniscus Lenses

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Meniscus Lenses
Posting date : Nov 19, 2007
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HS-CODE
70-
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Detailed Description
BK7 Meniscus Lenses Material: BK7 grade A, fine annealed Focal Length (f'): ±2% Diameter (F): -0.10mm Center Thickness (Tc): ±0.1mm Centration: 3 arc minutes Fringes: 1~5 Irregularity of Fringes: 0.1~0.5 Surface Quality: 20-10 scratch-dig Coating: MgF2 AR coated Clear Aperture: 90% F

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