MgF2 Crystal
MgF2 single crystal is a birefrigent material with particular properties. It has a high resistance to mechanical and thermal shock and radiation. With wide transparent range and high transmissibility, it becomes a popular choice for UV and excimer laser windows, polarizers, prisms, lenses, wedges, windows, and other optical components.
Features：
High optical transmittance from the vacuum ultraviolet to the infrared spectrum region(0.11～8.5μm).
Chemically stable.
Used for Optical prisms, lenses, wedges, windows, other optical components,and etc.
A positive birefringent crystal used for optical fiber communication.
Base Properties:
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OPTICAL
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Transmission Range
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0.11 to 7.5 microns
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Refractive Index
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N0=1.3836 Ne=1.3957 at 0.405 microns
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Reflection Loss
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11.2% at 0.12 microns (2 surfaces)
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Restrahlen Peak
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20 microns
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dN/dT
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+2.3 and +1.7 x 10-6e/ °C at 0.4 microns
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PHYSICAL
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Density
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3.177 g/cm3
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Melting Point
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1255 °C
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Thermal Conductivity
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0.3 W/(m K) at 27 °C
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Thermal Expansion
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13.7and 8.48 x 10-6e/ °C
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Hardness
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Knoop 415 kg/mm2
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Specific Heat Capacity, cal/(g K)
at 298 K at 1700 K |
0.24
0.362 |
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Dielectric Constant
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4.87 parallel and 5.45 perpendicular
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Young's Modulus (E)
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138.5 GPa
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Shear Modulus (G)
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54.66 GPa
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Bulk Modulus (K)
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101.32 GPa
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Elastic Coefficients
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C11=140.2 C12=89.5 C44=56.8
C33=204.7 C13=62.9 C66=95.7 |
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Apparent Elastic Limit
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49.64 MPa
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Poisson Ratio
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0.276
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CHEMICAL
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Solubility
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<0.0002 g/100g water at 0 °C
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Molecular Weight
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62.32
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Class/Structure
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Tetragonal, can cleave on C-axis
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Capabilities:
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Item
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MgF2 Crystal
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Wavelength
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110-8500nm
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Size
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0.1-100mm
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Orientation
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<6 arc min
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Parallelism
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<1arc sec
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Surface Quality
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20/10
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Flatness
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λ/ 10
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Clear Aperture
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>95%
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