FTIR Zinc Sulfide Windows

The FTIR (Fourier Transform Infrared Spectroscopy) window of ZnS material is an important optical component widely used in various environments that require high transparency and corrosion resistance. It has high transmittance, good chemical properties, high hardness, temperature limitation and other characteristics. Zinc sulfide FTIR window plates have excellent chemical composition, color and transparency, microcrystalline structure, and optical properties. Widely used in fields such as thermal imaging systems, medical equipment, and optical communication systems. In terms of production process and requirements, it is necessary to strictly control the process steps such as synthesis, pressing, polishing, and coating. In addition to zinc sulfide materials, Micron Optics can also provide FTIR window pieces made of calcium fluoride, barium fluoride, lithium fluoride, silicon, zinc selenide, fused silica and other materials.

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	Dia(mm)	ThK(mm)	Surface Quality	Surface Accuracy	Substrate Material
	Screen Reset Customizable	Screen Reset Customizable	Screen Reset 60-40	Screen Reset 5(3)	Screen Reset Zinc Sulfide
More+ Less	Customizable	Customizable	60-40	5(3)	Zinc Sulfide
FTIR Zinc Sulfide Windows Number：PZS01- Dia(mm)：Customizable ThK(mm)：Customizable Surface Quality：60-40 Surface Accuracy：5(3) Parallelism：3′ Diameter Tolerance(mm)：0.0/-0.1 Thk Tolerance(mm)：±0.1 Transmission Range：0.37-14μm Substrate Material：Zinc Sulfide Bevel(mm)：0.35 Chipping(mm)：/ REACH：Compliant ROHS：Compliant

Material Data
Physical Properties	CVD ZnS	Multispectral CVD ZnS
Density [g/cm3]	4.09	4.09
Resistivity [Ω.cm]	～1012	～101.3
Melting Point [℃]	1827
Chemical Purity [%]	99.9996	99.9996
Thermal Expansion [1/K]	6.610-6@273k 7.310-6@373k	6.310-6@273k 7.010-6@373k
Thermal Conductivity [J/k.m.s]	16.7@298k	27.2@298k
Specific Heat Capacity [J/g.K]	0.469@298k	0.515@298k
Knoop Hardness [kg/mm2]	200-235	160
Bending Strength [Mpa]	103
Young's Modulus [GPa]	74.5	74.5
Poisson's Coefficient	0.29	0.29
Optical Properties
Transmission Range	1-14μm	0.37-14μm
Refractive index in homogeneity [△n/n]	<7.3*10-4@10.6μm	<0.2*10-4@632.8nm
Absorption Coefficient [1/cm]	0.2@10.6μm	0.2@10.6μm
Thermal light coefficient [1/k,298-358k]	4.610-5@1150nm 4.310-5@3390nm 4.1*10-5@10.6μm	5.4310-5@632.8nm 4.2110-5@1150nm 3.87*10-5@3390nm

CVD ZnS
Wavelength(nm)	Refractive Index(n)	Wavelength(nm)	Refractive Index(n)
620	2.355	9800	2.203
1000	2.292	10600	2.192
3800	2.253	11400	2.18
5000	2.246	12200	2.167
7000	2.232	13800	2.132
9000	2.212	14200	2.126

Multispectral CVD ZnS
Wavelength(nm)	Refractive Index(n)	Wavelength(nm)	Refractive Index(n)
400	2.545	8000	2.223
1010	2.292	9000	2.213
2060	2.264	10000	2.201
3500	2.255	11250	2.183
4500	2.25	12000	2.171
5000	2.247	13000	2.153