Compound Lens

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Compound Lens
Posting date : Nov 19, 2007
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Free Member Scince Nov 19, 2007
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70-
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Detailed Description
We can produces all kinds of cemented Lenses, such as Achromatic cemented-double, Achromatic cemented-triple and Achromatic cemented-four etc. Achromatic Doublets ¨Computer-optimized for infinite conjugation ¨Excellent performance The achromatic-doublet consists of a positive low-index (crown glass) and a negative high-index (flint glass) lens. These lenses are computer-optimized for infinite conjugate ratio. They also exhibit excellent paraxial performance, with minimal spherical aberration, coma and chromatic aberration. When used for focusing or collimating, the convex lens or the smaller radius surface should face the collimated light, when used for imaging the convex lens should face the object or the image with that is farthest away.o:p>Large aperture achromatic lenses are air-spaced, and can be found under DH-0406. Material: Optical glass (crown and flint) 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% Φ Air-Spaced Achromatic Doublets The achromatic lenses with large aperture are air-spaced. All the air-spaced achromatic doublets show exceptional performance and provided with mounts.When used for focusing or collimating, the convex lens or the smaller radius surface always faces the collimated light, while used to image, the convex lens must be adjacent to the object or image with longer distance. Material: Optical glass (crown and flint) Focal Length (f'): ±2% Diameter (F): -0.10mm Center Thickness (Tc): ±0.2mm Centration: 3 arc minutes Fringes: 1~5 Irregularity of Fringes: 0.1~0.5 Surface Quality: 20-10 scratch-dig Coating: MgF2AR coated Clear Aperture: 90% Φ For more information about our company and our products, pls kindly visit our website: www.dhoptics.com

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