异形光学元件
| 属性 | 规格参数 | |
| 材质 | 各种高品质光学玻璃，N-BK7，熔融石英等 | |
| 尺寸公差 (mm) | ±0.15 (General), ±0.05 (High Precision) | |
| 中心偏差（弧秒） | ±1 (General), ±5 (High Precision) | |
| 角度公差 | ±0.2 deg. (General), ±10 arc sec. (High Precision) | |
| 表面质量 | 60/40 (General), 20/10 (High Precision) | |
| N | For Flat Surface | 1 (General), 0.2 (High Precision) |
| For Spheric Surface | 8 (General), 2 (High Precision) | |
| △N | For Flat Surface | 0.5 (General), 0.1 (High Precison) |
| For Spheric Surface | 2 (General), 0.5 (High Precison) | |
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