Zinc Selenide Optics

Why Zinc Selenide for Infrared Optics

Zinc selenide (ZnSe) is a wide bandgap semiconductor material and has been an ideal material for producing infrared optics because it has good transmittance in some visible light bands and infrared bands. In addition, it also boasts high purity, strong environmental adaptability, and easy processing. Hence, ZnSe optics have been widely used in various fields such as thermal imaging, lasering, and more.

Custom Your Project

Application of Zinc Selenide Optics

ZnSe lenses for thermal imager

ZnSe’s exceptional optical properties, which include high light transmission with minimal loss, uniform refractive index, and low absorption of infrared light, make it an ideal material for use in optical lenses of infrared thermal imagers and spectrometers.

ZnSe optics for mechanical and industrial

Zinc selenide (ZnSe) is also used for windows and lenses in medical and industrial bolometers and infrared spectrometers for its excellent optical properties and can transmit infrared light in a wide wavelength range.

ZnSe windows for FLIR thermal Imaging

Due to its uniform and consistent refractive index, this ensures that ZnSe optics provide high-quality image transmission, making it an ideal choice for protecting windows and optical components in forward-looking infrared (FLIR) thermal imaging systems.

ZnSe optics for laser system

The material ZnSe deposited through the chemical vapor deposition (CVD) technique is extensively employed in high-power CO2 laser systems because of its exceptional heat resistance and low absorption coefficient.

What NONI Can Offer with ZnSe Optics

At Noni, our custom capabilities not only win clients’ trust but also distinguish us in the industry.

Our attention to detail and commitment to achieving higher levels of accuracy while offering unlimited choices of types and shapes of custom ZnSe optics. We take great pride in our ability to deliver consistently accurate and reliable results to our clients.

Types

Accuracy

Products

Applications

Custom ZnSe Lenses in Different Types

Different types of ZnSe lenses, including total reflection mirrors, half reflection mirrors, beam expanders, flat-field lenses, mid-infrared lenses, far-infrared 10.6μm/CO2 power lasers, various plano-convex lenses, convex-concave crescent cutting lenses, gold-plated mirrors, circular polarizer, beam expander, flat-field lens, etc.

Custom ZnSe Optics of Higher Accuracy

At Noni, our capabilities to offer higher accuracy which seems challenging to others are not just our pride but also a key factor that sets us apart from our competitors.

Specifications for ZnSe Lenses

PARAMETERS	RANGES
Diameter range	10 to 400 mm
Diameter tolerance	± 0.01 mm
Center thickness	1 to 50 mm
CT tolerance	± 0.02
Surface irregularity (P-V)	≤ 0.5 fringes
RMS Irregularity – RMSi -D	≤ 12.6 nm
Surface roughness – Ra	≤ 2.5 nm

Specifications for ZnSe Windows & Mirrors

PARAMETERS	RANGES
Diameter range	10 to 400 mm
Length/Width	150 x 150 mm
Central Thickness (CT)	< 50 mm
CT tolerance	± 0.01 mm
Parallelism	≤ 30 arc seconds
Sagita deviation – A (Power)	0.5 fringes
Irregularity – B (PV)	0.25/0.068 (fringes/µm)
Digs	2 x 0.03 mm
Scratches	L2 x 0.02 mm
MIL – Scratch / Dig	80 – 50 to 20-10
Surface roughness – Rq	≤ 2 nm

Our Manufacturing Capability of ZnSe Opticals

Based on the exceptional property of ZnSe material itself and our outstanding manufacturing capabilities of ZnSe lenses and windows as well as our higher accuracy of specifications and consistent quality.

Our ZnSe optics are available for unlimited custom choices of round, rectangular, open, meniscus, wedge, plano-convex, plano-concave, bi-convex, bi-concave, spherical, prism, and are widely used in laser, medicine, astronomy and infrared night vision, and other fields.

ZnSe Laser Focusing Mirror

ZnSe focusing mirrors are made of laser-grade CVD zinc selenide material, preferred for high-power CO2 laser optical components. They focus light beams to produce high-energy density focuses for material processing with high precision and consistency throughout the focal depth range.

F-theta Scanning Lens

It is also known as a flat-field focusing mirror or linear lens. Unlike traditional focusing lenses that concentrate the focal spot on one point, the scanning lens disperses the laser beam to multiple points on the scanning area or workpiece, creating a uniform focused spot of the laser beam in the entire marking plane.

CO2 Laser Beam Expander

It can create a parallel beam that can be transformed into a high-power-density spot using a focusing lens. The ability to adjust the beam diameter allows for easy adaptation to different requirements. With optical filters, the beam expander to transform asymmetric beam distributions into more uniform ones.

ZnSe Beamsplitter

Ordinary beamsplitters are used to split or combine laser beams. Polarization beam splitters are used to split or combine two laser beams with orthogonal polarization states, making them invaluable in fields such as telecommunications where precise polarization control is necessary for reliable signal transmission.

ZnSe Beam Combiner

The beam combiner is used to combine the light of two wavelengths into one optical path by means of transmission and reflection respectively. In laser processing applications, it is commonly used to merge indicator light into the optical path. This helps improve the accuracy and efficiency of laser processing by providing a clear indication of processing area.

CO2 Laser Beam Expander

The CO2 laser beam expander is also called a partial reflector, which can reflect a part of the total laser energy back to the resonator, and let the other part of the energy transmit and output for processing. In industrial carbon dioxide lasers, the CO2 laser beam expander is mainly used in the laser resonator to ensure the laser power and output mode.

Application Examples of ZnSe Opticals

NONI has supplied quality ZnSe optics to serve military applications such as thermal imagers and night vision devices, laser applications such as laser marking, engraving, cutting, welding, medical, and infrared optical lenses such as infrared zoom lenses, and thermal induction lenses. Especially, infrared thermal imaging cameras have been widely used in the fields of preventive detection, process control, fire protection, security, and night vision.

Infrared Cameras for Firefighting

By detecting heat signatures, thermal imagers produce images that depict the distribution of temperature across the surface of an object. With that, firefighters can quickly and accurately locate fires even in dense smoke, identify potential fire sources within the walls, as well as locate trapped individuals who is difficult to find using other methods.

In addition to these benefits, thermal imaging cameras can also be used to monitor changes in temperature over time, providing firefighters with valuable information about how a fire is likely to develop and spread, which can help them to plan and execute their firefighting strategies more effectively.

Petrochemical Pipelines Inspection

In the petrochemical field, infrared thermal imaging technology can be used to detect temperature changes in pipelines and containers, so as to detect and deal with potential problems in time. For example, when the temperature of a pipeline or container changes abnormally, infrared thermal imaging technology can help the staff quickly find the problem and take corresponding measures to repair it.

Compared with traditional thermometers or probes, infrared thermal imaging technology has the advantages of non-contact, fast, real-time, and high precision, which can improve safety and efficiency in petrochemical production.

Infrared Detection for Substations

The use of infrared detection technology enables real-time monitoring of temperature changes in different equipment at substations. This facilitates the identification of abnormal hotspots in the equipment, and prompt maintenance measures can be taken to prevent safety incidents resulting from equipment malfunction.

Furthermore, infrared detection technology aids in analyzing the load distribution in substations, offering insights into the operational status of each piece of equipment. Subsequently, this information can be leveraged to optimize the management and operation mode of the substation, leading to enhanced efficiency and stability of operations.

FAQ, Frequently Asked Questions

Some important information you might want to know.

Do you offer standard optic components (Shelf Products) ?

No, we don’t sell shelf products. We offer customization service according to your requirements for specific projects or brands equivalent.
What substrates do you use for custom optical components?

Our most frequently used substrates are Zinc Selenide (ZnSe), Zinc Sulfide (ZnS), Silicon, Germanium (Ge), Copper, Aluminum, Mo, PMMA, Chalcogenide Glasses, etc.
Can you help to customize according to samples we offered?

We highly recommend producing according to specific drawings. Since there are lots of indexes which can not be obtained by measuring samples, such as requirements of material.
What's your MOQ for customized projects?

We set very low MOQ for customization projects. But of course, price will be quoted according to the quantity to cover our production cost.
How to protect my personal information and our technical information?

Don’t worry, we will sign the NDA with all our customers if needed.
What shipping methods are available?

We commonly use UPS, FedEx, DHL, TNT, SF, EMS etc. We also accept your own appointed forwarder.
What's the lead time for sampling, for mass production?

For customization projects, sampling lead time will be 1 to 2 weeks. For mass production, 1 to 2 months for orders with quantity 1000 to 2000 pieces.
Can you offer all the Certificates required by our customs and our company?
Every product that leaves the factory has been carefully tested. We would like to offer you all the certificates required by your side. Such as:

Raw material certificate and technical drawing

RoHS Report of substrate

Inspection report (data) of 3D optical profiler, surface flatness etc.

All products delivered by us will be carefully cleaned and packaged.

Get A Free Custom Quote

*Your privacy will be 100% confidential at Noni.