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Product details

Positive Achromatic Lens, Negative Achromatic Lens Dec 29, 2011

Company details

ChangChun Zhohome Import & Export Trading Co.,Ltd
No.517,ShenZhen Street 1-1,Economic and Technology Development Zone
changchun
China

Tel: 86-0431-81905988

*Material:BK7,ZF2,ZF7(or according to your request) *Dia.:+0/-0.05 *Center thickness tolerance:+/-0.1 *Surface quality: 60-40 Scrath/Dig *Surface figure:0.5-0.2 *Centration < 3arc min

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 wavelengths, usually in the blue and red region of the spectrum. Focal length is constant at those two wavelengths and focal length shifts are virtually eliminated across the visible wavelengths. One frequent use is to achieve diffraction limited focusing of a laser beam. Negative Achromats are typically used when there is a need to eliminate chromatic aberration. In addition to reducing chromatic aberration at the design wavelengths, spherical aberration and coma are greatly reduced.China Star Optics can provide Positive Achromatic Lens and Negative

 

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