الوصف

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 Achromatic Lens by two piece single lens (Doublet) or three piece

single lens (Triplet).

Specification of our achromatic lens as follow:


*Material:BK7,ZF2,ZF7(or according to your request)

*Dia.:*0/*0.*5

*Center thickness tolerance:+/*0.1

*Surface quality: ****0 Scrath/Dig

*Surface figure:0.**0.2

*Centration < 3arc min

*Chamfer:0.**0.*5**5 degrees

Design wavelength:**6.1mm,**7.6mm,**6.3mm