フッ化カルシウム（CaF2）レンズは、フッ化カルシウムを基板として作られています。フッ化カルシウムは、広い透過スペクトル範囲（180nm～8.0μm）を有し、高い損傷閾値、低い蛍光性、高い均一性、そして柔軟な物理的特性を備えており、様々な光学部品の基盤として使用されています。
Its transmission band covers ultraviolet, visible, and mid-infrared (approximately 0.13-10 μm). It is almost a standard choice, especially in the deep ultraviolet below 180 nm and the mid-infrared band of 3-5 μm.
With a refractive index of approximately 1.35-1.51 and an Abbe number as high as 95, it effectively reduces surface reflection loss and significantly reduces chromatic aberration, making it an ideal material for high-quality imaging systems.
It can withstand extremely high laser energies, making it ideal for use with high-power laser sources such as excimer lasers.
It exhibits superior moisture resistance compared to other fluorides, is twice as hard as barium fluoride, and possesses excellent optical homogeneity and no birefringence.
材料 | フッ化カルシウム（CaF2） |
|---|---|
| 焦点距離許容範囲 | ± 3% |
寸法公差 | ± 1% |
厚さ許容差 | ± 0.03mm |
表面精度 | △/v=0.3nm |
表面品質 | 10/5 |
中心化 | 1分角未満 |
クリアな絞り | > 90% |
面取り | < 0.1 |
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