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Product Description

Zinc Selenide lens ZnSe Lens

Zinc Selenide ZnSe is a transparent, yellowish polycrystalline substance which transmits in the range range 0.5-21µm. It is ideal for mid-infrared applications, but can also transmit some visible light. This means optics incorporating ZnSe lenses lend themselves to visual inspection when IR light is turned off.

The absorption coefficient of Zinc Selenide is 0.0005 cm-1 at 10.6 μm. When used at infrared wavelengths, Shanghai Optics ZnSe lenses have less than 0.3 percent total absorption, as measured using CO2 laser calorimetry. This ultra-low absorption means ZnSe lenses can reduce energy loss and increase accuracy in sensitive instrumentation: a crucial advantage for applications in laser optics where energy is focused on a very small point. Zinc Selenide has a melting point of 1525°C and a thermal conductivity is 18 W m-1 K-1 at 298K. The thermal expansion coefficient is 7.1 x 10-6 /°C at 273K. Zinc Selenide lenses exhibit a high resistance to thermal shock and can be used in thermally demanding applications. The reflectivity of Zinc Selenide is typically 29.1% at 10.6 μm (2 surfaces), and our ZnSe lenses can be AR coated for minimal energy loss. Since this is a soft material and can be easily scratched, we recommend you use especial care when handling your ZnSe lenses.

Substrate Material	ZnSe
Shape	Spherical Plano-Concave, P-Convex, Concave-Convex or Aspheric
Surface Figure	λ/20 before coating at 10.6μm
Surface Quality	40-20 per MIL-PRF-13830B
Dimensional Tolerance	+ 0.00mm, – 0.25mm
Thickness Tolerance	+/- 0.25mm
Chamfer	0.35mm at 45° (typical)
Concentricity	< 0.05mm
Antireflection Coating	Ravg < 0.6% per surface at 3-5μm Ravg < 0.75% per surface at 8-12μm Ravg < 0.5% per surface at 10.6μm
Clear Aperture	Exceeds central 85% of dimension
Absorption	<0.3% total absorption as measured by CO2 laser calorimetry
Design Wavelength	10.6μm

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Company Introduction

Shenyang Ebetter Optics Co.,Ltd. is a professional manufacturer of precision optical components and optical lens, diffraction grating manufacture. Since the company was established, it has been committed to the research and production and sales. We can carry out the optical system design and production of related accessories,and moreover we have already got import and export rights. nowadays products have been sold to many countries and regions,and established long-term good relations of cooperation with the optical companies of United States,Canada,the European Union and other countries. We get a good reputation with quality products.

FAQ

Q1. Are you a factory?
A1. Yes, we are a professional optical lens manufactruer in China, and have a factory in Changchun city, Jilin province.

Q2. What is the MOQ of optical lens?
A2. No MOQ for customer if optical lens is in stock.

Q3: Can I customize the products based on my need?
A3.Yes, we can customize the material, specifications and optical coating for your optical components based on your needs.

Q4. How can I get sample from you?
A4. Just send us your requirements, then we will send samples accordingly.

Q5. How many days will samples be finished? How about mass products?
A5. Generally, we need 1~2 days to finish the sample production. As for the mass products, it depends on your order quantity.

Q6. What's the deliver time?
A6. (1) For inventory: the delivery time is 5 workdays.
(2) For customized products: the delivery time is 7 to 25 workdays. According to the quantity.

Q7. How do you control lens quality?
A7. Producing process is in vacuum dust-free shop, like prepare material, mixed material and take out . Four times quality
checking during production process.

Q8. How about your optical lens production ability per day?
A8. About 20000 pairs/day.

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Znse double concave spherical lens optical laser camera lens znse windows cvd znse lens

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