Band-Opitcs has 3 years of aspherical production experience and owns a variety of aspherical production equipments, providing maximum diameter 500mm to minimum diameter 6mm. Customized optics are produced according to customers’ drawings and requirements of precision.
The forms of aspheres are: parabolic aspheres, elliptic aspheres, off-axis aspheres, free-form surfaces, etc. The process can be grind, polish, diamond turning, mould and so on.
The applications of our aspherical lenses can be applied for many industries, such as:
· Medical industry: Endoscope, Ophthalmic equipment
· Laser industry: Laser collimation
· Semiconductor industry: Wafer vision equipment, Visual radar equipment
· Aerospace industry: Optical tracking equipment, Optical relay equipment
· Military industry: Optical analog equipment, High power laser lenses
Belows are the precision requirements that we can provide for aspherical lenses:
| Specifications | High-precision | Precision | Common |
| Dimensional tolerance | +/-0.02mm | +/-0.05mm | +/-0.1mm |
| Thickness | +/-0.03mm | +/-0.05mm | +/-0.1mm |
| Radius | Customized |
| Flatness | PV<1/10L | PV<1/2L | PV<3/2L |
| Surface quality | 20-10 | 40-20 | 60-20 |
| Roughness | RMS<1nm | RMS<5nm | RMS<5nm |
| Parallelism | <1arcmin | <3arcmin | <5arcmin |
| Chamfer | <0.1mm x 45deg | <0.2mm x 45deg | <0.5mm x 45deg |
| Coating | AR coating/Dielectric coating |
