Product Details
CaF2 Optical Crystal
Description
Calcium fluoride(CaF2) is a very important optical functional
crystal, which has good optical properties, mechanical properties
and chemical stability. It can be used as optical crystal, laser
crystal and inorganic scintillation crystal. It has a wide
transmittance range (0.125-10 μm), and is widely used as optical
medium from vacuum ultraviolet to mid infrared. CaF2 crystal is an
ideal optical material for achromatic lenses because of its special
refractive index and relative dispersion. At present, deep UV
excimer laser lithography is developing from 193 nm to 121 nm. CaF2
single crystal has the advantages of good ultraviolet
transmittance, high laser damage resistance threshold, low stress
birefringence and high refractive index, which makes it the best
choice for the research of deep UV excimer laser lithography. In
terms of laser applications, laser diode pumped CaF2 crystals
activated by Er3+, Tm3+, Yb3+ and other 3-valent rare earth ions
were obtained at room temperature.
Features
- Excellent transmission from 125nm to 10um
- Good optical properties, mechanical behavior and chemical stability
- Anisotropy, soft and brittle, high coefficient of thermal expansion
and easy cleavage
- Special refractive index and relative dispersion value
- Soluble in acids
- Good ultraviolet transmittance, high laser damage resistance
threshold, low stress birefringence and high refractive index
Applications
- Optical crystal, laser crystal(IR, UV, VUV)
- Optical media and optical material
- Best material for the study of deep UV excimer laser lithography
- Substrate, optical waveguide
- IR analytic, astronomical-und camera lenses and optics for Excimer
laser
Material and Specifications
Orientation | [100] or [001] < ±0.5° |
Orientation Tolerance | < 0.5° |
Parallelism | <20〞 |
Perpendicularity | 5ˊ |
Surface Quality | 10-5 (MIL-O-13830A) |
Wavefront Distortion | <λ/4@633 nm |
Surface Flatness | <λ/8 @633 nm |
Clear Aperture | >90% |
Thickness/Diameter Tolerance | ±0.05 mm |
Physical and Chemical Properties
Crystal System | Isometric |
Habit | Cubic, massive |
Space Group | Fm3m |
Class (H-M) | m3m (4/m 3 2/m) – Hexoctahedral |
Lattice Constants | 5.4626 Å |
Z | 4 |
Streak | White |
Density | 3.175…3.56g/cm3 |
Melting Point | 1418°C |
Thermal Conductivity /(W·m-1·K-1@25°C) | 9.71@[111] |
Heat Capacity/(J ·(kg·K)-1) | 854 |
Thermal Expansion /(10-6·K-1@25°C ) | 18.9 |
Young`s Modulus /GPa | 75.8 |
Tenacity | Brittle |
Cleavage Quality | Perfect, perfect and easy |
Hardness (Mohs) | 4 |
Fracture | Conchoidal |
Optical characteristics
Transmission Range | 0.125 – 10 µm |
Refractive Index | 1.432-1.436 |
Reflective Loss | 2.89@4µm |
Optical Character | Isotropic |
Surface Relief | Moderate |
Birefringence | None |
Pleochroism | Absent |
Dispersion | 0.007 |
Poisson Ratio | 0.29 |
Dielectric Constant | 6.76 |
Index of Refraction
λ(μm) | n | λ(μm) | n | λ(μm) | n |
0.18 | 1.51 | 0.32 | 1.45 | 5.82 | 1.39 |
0.19 | 1.50 | 0.43 | 1.44 | 6.20 | 1.38 |
0.21 | 1.49 | 0.88 | 1.43 | 6.71 | 1.37 |
0.22 | 1.48 | 2.67 | 1.42 | 7.00 | 1.36 |
0.24 | 1.47 | 3.94 | 1.41 | 7.53 | 1.35 |
0.27 | 1.46 | 5.01 | 1.40 | 8.22 | 1.34 |
Spectrum
Company Profile
Crylink is a manufacturer and supplier of Single Crystal Materials and
optical components used in lasers, imaging and other optical areas.
Crylink is one of the high tech company of Nanjing Institute of Advance
Laser Technology(NIALT), which is the only one industrialization base of Shanghai
Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences.
Our peoduct mainly include laser crystal,nonlinear crystal, Q-switch crystal,laser,scintillator crystal , optic crystal and Piezoelectric crystal.
Crylink
——growing crystals, linking values
We are seller of crystals. At same time, we are producer of
crystals.
It is a long and arduous process from seed crystal to the desired
single crystal, the composition of the crystal changes through
three states and eventually grows into beautiful crystals. We
witness the growth process of each crystal and clearly know
technologies of each step in the crystal growth process, which
means that we can directly provide customers with crystals that
satisfied customer requirements.
We create value. At same time, we link value.
From company to individual, we all pursue the word "value".
Individual is valuable in society, enterprise is valuable in the
industry. We cherish the existence of value. We hope to set the
enterprise’ value as start pointing, expand to the surrounding,
extend the value from the customer to the supplier. Linking
enterprise and the industry more closer, to create more value.