Products CaF2(Fluorite)
Characteristic
![Characteristic](/ja/img/fluorite/img_caf2_01.jpg)
![Characteristic](/ja/img/fluorite/img_caf2_02.jpg)
![Characteristic](/ja/img/fluorite/img_caf2_03_en.jpg)
- The transmitted wavelength region ranges widely from vacuum ultraviolet to infrared.
- The crystalline material shows a low dispersion and also anomalous dispersion. This material can be used to produce an apochromatic lens in combination with other optical materials.
- The crystalline material is physically and chemically stable, and is resistant to water and chemicals.
Canon Video Square
![Canon Video Square](/ja/img/fluorite/v-square_fluorite-lenses_en.jpg)
Internal Transmittance
![Internal Transmittance](/ja/img/fluorite/graph_internal_tra_en.gif)
Physical Properties
Basic Physical Properties | |
---|---|
Name of crystal material | CaF2 |
Transmittance wavelength range(µm) | 0.13~10 |
Color | Colorless |
Density (g/cc) | 3.18 |
Melting point (℃) | 1418 |
Solubility (g/100gH2O) (20℃) | 0.00151 |
Molecular weight | 78.08 |
Crystal system | Cubic |
Crystal structure | Fluorite type |
Cleavage plane | {111} |
![Physical Properties](/ja/img/fluorite/fluorite_octagon.jpg)
Thermal Properties | |
---|---|
Thermal Expansion α (/℃)(20℃~60℃) |
24×10-6 |
Thermal Conductivity λ (cal/cm・sec・℃) |
2.41×10-2 |
Specific Heat Cp (cal/g・℃) |
0.211 |
Mechanical Properties | |
---|---|
Knoop Hardness Hk | 158.3 |
Young’s Modulus E (GPa) |
75.8 |
Modulus of Rigidity G (GPa) |
33.77 |
Poisson Ratio | 0.26 |
Application
![Telephoto lens for digital single-lens reflex camera](/ja/img/fluorite/app_caf2/telescope_lens.jpg)
Telephoto lens for digital single-lens reflex camera
![Astronomical telescope](/ja/img/fluorite/app_caf2/astronomical_telescope.jpg)
Astronomical telescope
![Television camera](/ja/img/fluorite/app_caf2/television_camera.jpg)
Television camera
![Ultraviolet microscope](/ja/img/fluorite/app_caf2/ultraviolet_microscope.jpg)
Ultraviolet microscope