其他說(shuō)明
直徑 |
Mirror Side Surface Figure |
Mirror Side Surface Quality |
|
25.0 mm NEW! |
U-grade | < 波長(zhǎng)/ 10 | 20-10 scratch-dig |
S-grade | < 波長(zhǎng) / 5 | 40-20 scratch-dig | |
25.4 mm (1.00" ) |
U-grade | < 波長(zhǎng)/ 10 | 20-10 scratch-dig |
S-grade | < 波長(zhǎng) / 5 | 40-20 scratch-dig | |
50.8 mm (2.00" ) | < 波長(zhǎng) / 4 | 20-10 scratch-dig |