硅（Si）是可用的最坚硬的矿物和光学材料之一，用于近红外（1µm）至约6µm。光学质量硅通常掺杂有其他矿物，以防止在传输波段内出现吸收带。
规格
Material: Sapphire
Diameter: +0.0/-0.1mm
Centring Accuracy: <5’
Focal Length: ±2.0%
Centre Thickness: ±0.25mm
Surface Quality (S/D): <60/40’
Diameter: +0.0 / -0.20 mm
Length / width: ±0.1 mm
Thickness: ±0.1 mm
Flatness: <5λ
Surface quality: <60-40 scratch/dig
Parallelism: 5 arc min
LENSES: Diameter 3mm to 100mm+
PRISMS: Lengths / Widths 3mm to 50mm+
WINDOWS: Diameter 2mm to 300mm+
AR Coatings are available on all
BaF₂光学窗口、Knight Optical光学材料、氟化钡窗口、CaF2棱镜、CaF2透镜、Knight Optical光学材料、Knight Optical偏振器、Knight Optical光学材料、Knight Optical氟化镁光学窗口、Knight Optical光学材料、蓝宝石光学窗口、C形切割蓝宝石窗口、Knight Optical光学材料、Knight Optical光学窗口、Knight Optical漫反射器、Knight Optical玻璃漫反射器、Knight Optical紫外线磨砂玻璃漫反射器、Knight Optical偏振分束器、Knight Optical光学分束器、Knight Optical平板分束器、Knight Optical紫外线分束器、Knight Optical红外分束器、Knight Optical非偏振分束器、Knight Optical偏振分束器、Knight Optical偏振器、Knight Optical偏振棱镜、Knight Optical偏振片、Knight Optical光栅、Knight Optical条形格栅、Knight Optical衍射光栅
