불화칼슘(CaF₂) 렌즈는 불화칼슘 기판으로 만들어집니다. 불화칼슘 소재는 넓은 투과 스펙트럼 범위(180nm~8.0μm)를 가지며, 높은 손상 임계값, 낮은 형광, 높은 균일성 및 부드러운 물리적 특성을 지니고 있어 다양한 광학 부품의 기본 소재로 사용됩니다.
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.
재료 | 불화칼슘(CaF2) |
|---|---|
| 초점 거리 허용 오차 | ± 3% |
치수 공차 | ± 1% |
두께 공차 | ± 0.03mm |
표면 정확도 | △/v=0.3nm |
표면 품질 | 10/5 |
중심화 | < 1 arc min |
투명 개구부 | 90% 이상 |
모따기 | < 0.1 |
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