N-BK7 SF11 Optical Glass Achromatic Doublet for High-Resolution Photography
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...type of borosilicate crown glass with high transmittance in the visible and near-infrared spectrum. SF11: A type of flint glass known for its ability to correct chromatic aberrations in combination with crown glass. Property Refractive Index:...
Shanghai Longway Special Glass Co., Ltd.
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Achromatic K9 Optical Glass Lens Doublet Telescope Convex Concave Spherical Lens
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Specification Materials BK7 or other optical glass,quartz,sapphire,Ge,Si,ZnSe,CaF2 etc Diameter 1.5~300mm Radius R0.8mm-∞ Focal length -30000mm~+30000mm Center thickness tolerance +/-0.01mm Diameter tolerance +/-0.005mm Focal length tolerance +/-1% Surface......
Shanghai Advance Optical-Electronics Technology Co., Ltd
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BK7 ZF2 Or ZF5 Custom Optical Components Positive Achromatic Lenses
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Acromatic Lens Achromatic Lens is an achromatic consists of a positive low-index Crown Glass lens element cemented to a negative high-index Flint Glass lens element. The elements are chosen so as to cancel chromatic aberration at two well-separated ......
Wuhan Siwer Optics Co.,Ltd
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