CVD ZnS-Optical crystal-Beijing Honour Optics Co., Ltd-Honour Optics Co., Ltd

CVD ZnS

Chemically vapor-deposited Zinc Selenide (CVD ZnSe) is a preferred material for optical components in high power CO2 lasers due to its low absorption at 10.6μm. Also, for its excellent optical performance, CVD ZnSe is widely used as windows, lenses and prisms in high resolution FLIR systems.

Honour's CVD ZnSe shows theoretical transmisision across 0.5~18μm waveband and has very low absorption at 10.6μm with the bulk absorption coefficient less than 5×10-4cm-1. Fine controlled grain size makes GUOJING's CVD ZnSe stable to thermal shock and hostile environment.

Blanks, windows, lenses and prisms can be made according to your specifications, with the size up to 250×200×12mm.

Physical Properties

Symbol	ZnSe
Crystal Structure	Cubic
Melting Point (℃)	1520
Density (g/cm3)	5.27
Purity	> 99.9995%

Optical Properties

Refractive Index

As a function of wavelength at room temperature (20℃)

Wavelength(μm)	n
0.54	2.6754
1.0	2.4892
3.0	2.4376
5.0	2.4295
7.0	2.4218
8.2	2.4163
10.2	2.4053
11.0	2.4001

Bulk Absorption Coefficient (@10.6μm, cm-1) < 5×10-4

Index of Refractive Homogeneity (@0.6328μm) < 1×10-5

Thermo-optic coefficient (dn/dt) 6.1×10-5 (@10.6μm)

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Thermal Properties

Thermal Expansion Coefficient (10-6, ℃-1) 5.75

Modulus of Rupture (Mpa) 55 (@room temperature)

Thermal Conductivity (@300K,Wcm-1.K-1) 0.18

Heat Capacity (Cal/g.K) 0.086

Mechanical Properties

Young’s Modulus (Gpa) 67.2

Poisson's Ratio 0.28

Hardness(knoop)(kg/mm2) 105

Products Specifications

Shapes	Circular: windows, spherical lenses
	Rectangular: windows
Maximum Dimension	Circular: ∮250×15mm
	Rectangular: 250×200×15mm
Tolerance	Diameter: +/- 0.05mm
	Length & Width: +/- 0.05mm
	Thickness: +/- 0.05mm
Surface Quality	Plano blanks: as cut
	Polished windows: to customer