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CaF2, Calcium Fluoride Crystal

CaF2 window & lens - Calcium fluoride crystal provides great transmission from VUV to IR 0.13-11 µm). Sythetic CaF2 crystal is used to improve deep UV transmission and to increase the damage threshold. Calcium Fluoride, CaF2 crystal is available doped with Europium as a gamma-ray scintillator.

CaF2 Crystal Properties

Transmission Range : 0.13 to 11 µm
Refractive Index : 1.39908 at 5 µm
Reflection Loss : 5.4% at 5 µm
Absorption Coefficient : 7.8 x 10E-4 /cm @ 2.7 µm
Reststrahlen Peak : 35 µm
dn/dT : -10.6 x 10E-6/°C
dn/dμ = 0 : 1.7 µm
Density : 3.18 g/cm³
Melting Point : 1360°C
Thermal Conductivity : 9.71 W /m /K
Thermal Expansion : 18.85 x 10E-6 /°C
Hardness : Knoop 158.3 (100) with 500g indenter
Elastic Coefficients : C11 = 164 C12 = 53 C44 = 33.7
Specific Heat Capacity : 854 J /Kg /K
Dielectric Constant : 6.76 at 1MHz
Youngs Modulus (E) : 75.8 GPa
Shear Modulus (G) : 33.77 GPa
Bulk Modulus (K) : 82.71 GPa
Apparent Elastic Limit : 36.54 MPa
Poisson Ratio : 0.26
Solubility : 0.0017g/100g water at 20°C
Molecular Weight : 78.08
Class/Structure : Cubic (111) cleavage

Refractive Index vs Wavelength

λ(μm)	0.19	0.21	0.25	0.33	0.88	2.65	3.90	5.00	7.00	8.22
n	1.51	1.49	1.47	1.45	1.43	1.42	1.41	1.40	1.38	1.36

Applications: Cryogenically cooled thermal imaging, Astronomical, Microlithography, Excimer Laser applications.

CaF2 Crystal Specifications

Size:	Diameter up to 200mm (IR grade) Diameter up to 80mm (UV grade)
Inclusion	None visible
Dimension tolerance	+/-0.1mm
Oriential tolerance	6 arc minutes
Surface Quality	20/10
Parallelism	20 arc seconds
Perpendicularity	10 arc minutes
Flatness	λ/8 @ 632.8nm

CaF2 Crystal Order Information

OptoCity offer CaF2 crystal and CaF2 products include: CaF2 Lenses, CaF2 Windows, CaF2 Optical Beamsplitters, CaF2 Optical Filters, CaF2 Wedges, CaF2 Prisms, etc. Please send us an email to request for quote.

i.

1. CaF2 Window

CAF12-2, Φ12.7 x 2 mm CaF2 Window

$25.00*

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CAF25-2, Φ25.4 x 2 mm CaF2 Window

$35.00*

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CAF25-3, Φ25.4 x 3 mm CaF2 Window

$35.00*

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CAF50-4, Φ50.8 x 4 mm CaF2 Window

$65.00*

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Additional message: Quantity...

ii.

2. CaF2 Lens

PCL212-35 CaF2 Plano-convex lens Φ12.7mm FL=35mm

$99.00*

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PCL212-100 CaF2 Plano-convex lens Φ12.7mm FL=100mm

$199.00*

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PCL225-50 CaF2 Plano-convex lens Φ25mm FL=50mm

$219.00*

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PCL225-100 CaF2 Plano-convex lens Φ25mm FL=100mm

$258.00*

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PCL225-100 CaF2 Plano-convex lens Φ25mm FL=200mm

$299.00*

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PCL250-150 CaF2 Plano-convex lens Φ50mm FL=150mm

$598.00*

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Additional message: qty. Custom dia. focal length

iii.

CaF2 crystal Inquiry

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