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The term aspheric mirror literally means a mirror that is not spherical. More-specific terms like parabolic mirror, hyperbolic mirror, and flat mirror are generally used for specific mirrors to which they apply, the term aspheric used when speaking of properties applying to them in general, or for shapes without such a well-known specific term. The mirror shapes in astronomical optics often termed aspheric are mirrors that simultaneously incorporate two types of curvature, with one dominating in the center of the mirror and another dominating toward the edges. Some optics designs that eliminate various aberrations make good use of use such aspheric mirrors or aspheric lenses, i.e., lenses incorporating such curves. 

The Aspherical Lens is mainly used to focus light, and it corrects Spherical Aberration. Aspherical Lens increases the numerical aperture of the lens while minimizing system aberrations. Aspherical Lens also reduces the number of Optical components required in an Optical System.

Aspherical workshop equipped with German-made Satisloh grinding and polishing machines, U.S Single Point Diamond Turning lathe, self-developed aspherical polishing machines,total of 30 sets of equipments. Along with 1 Mahr Profiler. BOXIN is able to process diameter from 10mm to 450mm, PV-0.1μm. Annual output is 50,000 pieces.

General specifications

• Materials: colorless optical glass, laser crystal, fused silica, radiation resistant glass, ultraviolet and infrared materials, metal materials, such as SiO ₂, CaF ₂, BaF ₂, ZnSe, ZnS, Ge, Si, Al, Cu, etc.
• Appearance range (mm): Φ 10~ Φ four hundred and fifty
• Appearance tolerance (mm): ± 0.01~± 0.2
• Thickness tolerance (mm): ± 0.01~± 0.1
• Surface quality: 20/10~80/50
• Surface accuracy: 0.1 μ M-3 μ M
• Eccentricity: 30 "to 5" (or Δ T ≤ 0.02)
• High order coefficient: 18th order
• Production capacity: 50000 pieces/year
• Coating: Customized according to requirements (see Boxin Coating Process Type and Film Layer Introduction for details)