Zinc Selenide Biconvex Lens

zinc selenide double-convex lenses have the characteristics of low absorption and thermal shock resistance, and are used for imaging relay systems and objects at finite conjugate distances. The focal length is positive, that is, the light will be focused to a point after passing through the convex lens. UM OPTICS can provide 2-300mm diameter, 0.12-60mm thickness (accuracy up to 20-10, 1/10L@633nm) zinc selenide lenticular lens, with rubber plate polishing, high-speed polishing, ring polishing and CNC polishing four major processes, with ZYGO, AFM, reflection and transmission bias, 15 seconds goniometer, UV gluing and centring system, non-contact laser thickness gauge, 2D imager and ball diameter meter, can be plated with MgF2, UV-AR, UV-VIS, VIS-EXT, VIS-NIR, NIR I, NIR II, Telecom-NIR, SWIR, SWIR, YAG-BBAR and other film systems.

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All products are provided with invoices, with a tax point of 13.

The product undergoes multiple inspections before being stored, and the quality is guaranteed. Please use it with confidence.

Spot products, shipped within 48 hours. For non stock or customized products, please consult.

International order logistics include DHL, FedEx, TNT, and EMS

When receiving the product, please ensure the integrity of the product packaging box first. If there is serious damage to the appearance, please refuse and contact us, and we will handle it for you as soon as possible.

Optical products are special items and cannot be returned or exchanged unless there is a quality issue with the product itself

If you need customization or bulk production, please contact us online and we will offer you a discounted price.

	Dia(mm)	Focal Length(mm)	Center Thickness(mm)	Edge Thickness(mm)	Design Wavelength(μm)	Radius of Curvature(mm)	Surface Quality
	Screen Reset 2-300	Screen Reset 15-5000	Screen Reset 0.12-60	Screen Reset 0.12-60	Screen Reset Custom	Screen Reset Custom	Screen Reset 60-40
More+ Less	2-300	15-5000	0.12-60	0.12-60	Custom	Custom	60-40
Zinc Selenide Biconvex Lenses Number：PZE05- Dia(mm)：2-300 Focal Length(mm)：15-5000 Center Thickness(mm)：0.12-60 Edge Thickness(mm)：0.12-60 Design Wavelength(μm)：Custom Radius of Curvature(mm)：Custom Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Zinc Selenide（ZnSe） PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：Uncoated REACH：Compliant ROHS：Compliant

Material Data
Physical Properties
Crystal Structure	Cubic
Density [g/cm3]	5.27
Resistivity [Ω.cm]	～1012
Melting Point [℃]	1525
Chemical Purity [%]	99.9996
Thermal Expansion [1/K]	7.110-6@273k 7.810-6@373k 8.3*10-8@473k
Thermal Conductivity [J/k.m.s]	18.0@298k
Specific Heat Capacity [J/g.K]	0.339@298k
Knoop Hardness [kg/mm2]	110
Bending Strength [Mpa]	55
Young's Modulus [GPa]	67.2
Poisson's Coefficient	0.28
Optical Properties
Transmission Range	0.5-22μm
Refractive index inhomogeneity [△n/n]	<3*10-6@632.8μm
Absorption Coefficient [1/cm]	5.010-3@1300nm 7.010-4@2700nm 4.010-4@3800nm 4.010-4@5250nm 5.0*10-4@10600nm
Thermal light coefficient [1/k,298-358k]	1.0710-4@632.80nm 7.010-5@1150nm 6.210-5@3390nm 6.110-5@10600μm

Wavelength(nm)	Refractive Index(n)	Wavelength(nm)	Refractive Index(n)
620	2.5994	10600	2.4028
1000	2.4892	13000	2.385
3800	2.4339	14600	2.3705
5000	2.4295	16600	2.3487
7000	2.4218	17800	2.3333
9000	2.4122	18200	2.3278