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Lithium fluoride (LiF) crystals have the lowest refractive index among commonly used infrared optical materials. Their transmission spectrum ranges from 120nm to 7000nm and are commonly used in lenses, prisms, and windows for thermal imaging systems, aerospace optical systems, and excimer laser optical systems. This material has a high water solubility and a relatively low thermal expansion coefficient. When used in atmospheric environments, special measures must be taken to prevent deliquescence and deformation.
Diameter (mm) | Thickness (mm) | Coating requirements | Diameter (mm) | Thickness (mm) |
10 | 1 | AR/AR 3-5μm | 75 | 3 |
12.5 | 1 | 75 | 5 | |
20 | 2 | 76.2 | 6 | |
25 | 3 | 80 | 8 | |
30 | 3 | 90 | 10 | |
38.1 | 3 | 100 | 10 | |
40 | 4 | 150 | 15 | |
50 | 3 | 180 | 18 | |
50.8 | 3 | 200 | 20 | |
63.5 | 5 | 300 | 35 |
Technical requirements | Commercial Grade | High precision grade |
Size range | 1-200mm | 1-200mm |
Diameter tolerance | Soil 0.1mm | Soil 0.01mm |
Thickness tolerance | Soil 0.1mm | Soil 0.01mm |
Parallel deviation | ±3´ | ±2´´ |
Surface quality | 60-40 | 20-10 |
Surface accuracy | 1.0λ | λ/20 |
Coating | AR/AR 3-5μm | |
Chamfer | 0.1-0.5mm*45° | |
Material | lithium fluoride | |
Lithium fluoride (LiF) crystal has the lowest refractive index among commonly used infrared optical materials. Its transmission spectrum ranges from 120nm to 7000nm. It is usually used in lenses, prisms and windows of thermal imaging systems, aerospace optical systems and excimer laser optical systems.
ServiceServiceLithium fluoride (LiF) crystals have the lowest refractive index among commonly used infrared optical materials. Their transmission spectrum ranges from 120nm to 7000nm and are commonly used in lenses, prisms, and windows for thermal imaging systems, aerospace optical systems, and excimer laser optical systems. This material has a high water solubility and a relatively low thermal expansion coefficient. When used in atmospheric environments, special measures must be taken to prevent deliquescence and deformation.
Diameter (mm) | Thickness (mm) | Coating requirements | Diameter (mm) | Thickness (mm) |
10 | 1 | AR/AR 3-5μm | 75 | 3 |
12.5 | 1 | 75 | 5 | |
20 | 2 | 76.2 | 6 | |
25 | 3 | 80 | 8 | |
30 | 3 | 90 | 10 | |
38.1 | 3 | 100 | 10 | |
40 | 4 | 150 | 15 | |
50 | 3 | 180 | 18 | |
50.8 | 3 | 200 | 20 | |
63.5 | 5 | 300 | 35 |
Technical requirements | Commercial Grade | High precision grade |
Size range | 1-200mm | 1-200mm |
Diameter tolerance | Soil 0.1mm | Soil 0.01mm |
Thickness tolerance | Soil 0.1mm | Soil 0.01mm |
Parallel deviation | ±3´ | ±2´´ |
Surface quality | 60-40 | 20-10 |
Surface accuracy | 1.0λ | λ/20 |
Coating | AR/AR 3-5μm | |
Chamfer | 0.1-0.5mm*45° | |
Material | lithium fluoride | |
