The company can produce low softening point preform with various shapes and materials, and preform is used for precision molding. The molded product is widely used as the lens of digital camera, projector, vehicle, CCTV lens, gun sighting, mobile camera, and intelligent visual. The low softening point optical glass includes D-K, D-PK, D-ZPK, D-ZK, D-LaK, D-ZF, D-LaF, D-ZLaF.
The shape of the low softening point preform is spherical, Bi planar wafers, ball, etc. The product can be customized according to customer requirements.
Item | Spherical preform | Biplane preform | Ordinary ball | Fiber ball |
Outer diameter | 6mm～90mm | 5mm～150mm | 0.5mm～30mm | 2mm |
Outer diameter tolerance | ±0.008mm | ±(0.003～0.015)mm | ±0.003mm | |
Thickness tolerance | ±0.02mm | ±(0.01～0.05)mm | ||
Radius of curvature | R≥3mm | |||
Surface defects(MIL) | 20-10 | 20-10 | 40-20 | 20-10 |
Sphericity | 0.002mm | 0.0004mm |
