
Applications of Zinc Selenide (ZnSe)
1. Laser processing: Zinc selenide lenses play an important role in the CO2 laser processing industry, including laser cutting, engraving, marking, drilling, and other laser systems. These lenses are capable of withstanding high power densities of laser light and have a strong, non-peeling, wipe-resistant surface coating.
2. Infrared optical systems: Because zinc selenide has low absorption of infrared wavelengths and transmits visible light, it is the material of choice for infrared lenses, windows, output couplers, and beam expanders. Zinc selenide lenses are ideal for use as protective windows and optics in forward-looking infrared (FLIR) thermal imaging systems. They are also widely used for windows and lenses in medical and industrial thermal radiometers and infrared lens spectrometers.
3. Optical research and instrumentation: Zinc selenide lenses are also used in scientific research and precision optical instrumentation, for example, where high transmittance and good optical properties are required.
Transmission range: 0.5-22 μm.
Applicable wavelengths: visible, near-infrared, mid-infrared and far-infrared wavelengths.
Refractive index: approx.2.4 (at 10 μm wavelength).
Characteristics: moderate refractive index, suitable for a wide range of optical designs.
Dispersion: low, suitable for wide band applications with low color aberration.
Hardness: low, easy to scratch, need to be coated with protective film.
Thermal conductivity: medium, general heat dissipation.
Coefficient of thermal expansion: high, average thermal stability
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It is also available to supply the coating wavelength curve, such as AR coating, BBR coating, filter coating, and so on.

Changchun Yutai Optics Co., Ltd. is a manufacturer with ISO9001 certification. We specialize in high-performance optical components
including lenses, mirrors, filters, windows, and prisms which are specified by customers. Yutai's items are widely used in imaging, defense, medical,
laser, and industry markets. As a fast-growing supplier in Optics, Yutai Optics has quickly established itself as a leader in optical components with advanced technology and quality control ability as Yutai aims to provide professional service and good quality items to meet customers' requests.
Yutai already established long-term relations with many powerful companies all over the world.




- Q: What are your main products?
- A: Optical lenses, mirrors, windows, filters, prisms
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- Q: How long is your delivery time?
- A: In general delivery time is about one month for custom-produced optics. except for stock ones or some special optics.
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- Q: Do you provide samples? is it free or extra?
- A: We can provide free samples if we have stock optics as you request, while custom-produced samples are not free.
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- Q: What is your MOQ?
- MOQ is 10pcs for most of the optics, while MOQ could be only one piece if you need a element in big dimention.
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- Q: What are your terms of payment?
- T/T, L/C, VISA, Paypal, Alipay or Negotiation.