| parameter | miniature glass sphere/aspheric lens |
| material | glass, fused silica etc. |
| diameter | mini. 1.5mm |
| diameter tolerance | /-0.003mm |
| decenter | 40″ |
| flatness(in 25mm area) | n=3, △n=0.1 |
| surface quality | 20-10 |
| coating | ar film, reflection film, splitter film etc. |
* remark：customized is available | |