Zinc Sulfide Lens
Zinc Sulfide Lenses are precision infrared optical components manufactured from multispectral-grade zinc sulfide (ZnS). Their broadband transmission, low absorption, excellent MWIR–LWIR performance and good mechanical strength support reliable imaging in demanding infrared optical systems.
Zinc Sulfide Lens Overview
Zinc Sulfide Lenses are manufactured from multispectral-grade ZnS for infrared focusing and imaging. The material transmits from approximately 0.4 to 14 μm, covering visible, MWIR and LWIR wavelengths.
Low absorption and broadband transmission make ZnS lenses suitable for thermal cameras, infrared sensors, laser systems and night-vision equipment. Their mechanical strength and environmental durability also support demanding field applications.
Chenyu Optics manufactures custom ZnS lenses according to customer drawings, including custom diameter, focal length, optical surface design, surface quality and infrared AR coatings.
Key Advantages of Zinc Sulfide Lens
Thermal Imaging & Infrared Camera Systems
ZnS lenses provide broadband focusing and imaging performance for thermal cameras, infrared sensors, night vision and multispectral optical systems.
Typical Specifications of Zinc Sulfide Lens
| Material | Zinc Sulfide (ZnS), Multispectral Grade |
|---|---|
| Optical Function | Infrared imaging and light focusing |
| Lens Type | Zinc Sulfide Lens |
| Transmission Range | Approximately 0.4–14 μm |
| Infrared Region | MWIR / LWIR |
| Absorption | Low |
| Diameter | Customized |
| Focal Length | Customized |
| Surface Accuracy | λ/10 @ 633 nm |
| Surface Quality | 20-10 / 40-20 scratch-dig |
Zinc Sulfide Lens Geometry & Optical Principle
Why Choose Chenyu Optics for Zinc Sulfide Lens
Chenyu Optics supports drawing-based precision ZnS lens manufacturing for infrared imaging, sensing and laser systems, from prototype verification through repeat production.
Manufacturing Capability for Zinc Sulfide Lens
Precision ZnS Polishing
Controlled lens shaping and polishing for custom diameter, focal length, surface accuracy and surface quality.
Infrared AR Coating
MWIR, LWIR and custom broadband AR coating fabrication according to the operating wavelength and incident angle.
Inspection & Packaging
Dimensional, surface and optical performance inspection followed by clean handling and protective packaging.
Coating Options for Zinc Sulfide Lens
Uncoated ZnS
Suitable when natural broadband ZnS transmission is sufficient or when the customer will apply a system-specific coating.
MWIR AR Coating
Optimized to reduce reflection and improve transmission in the 3–5 μm mid-wave infrared region.
LWIR & Custom AR Coatings
Designed for 8–12 μm systems or customized wavelength ranges, incident angles and environmental requirements.
Zinc Sulfide Lens Coating Selection
| Option | Typical Range | Recommended Use | Design Note |
|---|---|---|---|
| Uncoated | Broadband ZnS range | Prototypes and broadband systems | Natural surface reflection remains |
| MWIR AR | 3–5 μm | MWIR cameras and sensors | Optimized for the specified incident angle |
| LWIR AR | 8–12 μm | Thermal imaging and detection | Reduces reflection in the LWIR region |
| Custom AR | Customer specified | Multispectral and laser systems | Specify wavelength, AOI and environment |
Applications of Zinc Sulfide Lens
Thermal Imaging
Broadband focusing optics for thermal imaging systems.
Infrared Cameras
MWIR and LWIR imaging lenses for infrared cameras.
IR Sensors
Efficient signal collection and focusing for sensor systems.
Night Vision
Durable optics for night-vision observation equipment.
Infrared Lasers
Custom focusing elements for infrared laser systems.
Thermal Detection
Reliable optical transmission for thermal detectors.
Aerospace Optics
Infrared optics for demanding aerospace environments.
Industrial Inspection
Thermal inspection optics for industrial monitoring.
Zinc Sulfide Lens FAQ
What is a zinc sulfide lens used for?
A zinc sulfide lens is used for infrared focusing and imaging applications where broadband transmission and durability are required.
What wavelength range does a ZnS lens support?
Multispectral-grade ZnS provides broadband transmission from approximately 0.4–14 μm, covering visible, MWIR and LWIR applications.
Why choose ZnS for infrared optical lenses?
ZnS offers excellent infrared transmission, low absorption, good mechanical strength and stable performance in demanding environments.
Can ZnS lenses be customized?
Yes. Chenyu Optics provides customized diameters, focal lengths, surface designs, surface quality and MWIR or LWIR AR coating solutions.
Related Infrared Optical Products
Need Custom Zinc Sulfide Lenses?
Send us your drawing, diameter, focal length, surface requirements, operating wavelength, coating specification and quantity. Chenyu Optics will review the requirements and provide a suitable ZnS lens manufacturing solution.