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Windows-Zinc selenide-ZnSe Zns

POC-OC-122475-ZnSe Crystal

  • Broad transmission range: 0.55 μm to 20 μm.
  • Low optical absorption, making it ideal for high-power CO₂ laser systems.
  • Uniform refractive index for consistent performance across infrared applications.
  • Excellent thermal and optical properties for FLIR and imaging systems.
  • Customized dimensions and coatings available upon request.

Customizable Components Available for This Material to Meet Your Specific Needs!

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ZnSe Crystal Material General Description

Zinc Selenide (ZnSe) crystal is a transparent yellow material known for its excellent optical transmission properties and low optical absorption in the infrared region. With a transmittance range from 0.55 μm to 20 μm, ZnSe is widely used in CO₂ laser optics, forward-looking infrared (FLIR) systems, and other thermal imaging applications. Its uniform refractive index and low absorption make it an ideal choice for high-power laser systems, medical equipment, and astronomy.

ZnSe crystals are grown through the chemical vapor deposition (CVD) method, ensuring high purity and uniformity for optical applications. Additionally, ZnSe’s mechanical strength and durability make it suitable for demanding applications requiring stable performance under extreme conditions.

ZnSe Crystal General Applications

  1. High-Power CO₂ Laser Systems:
    ZnSe crystals are extensively used in high-power CO₂ laser systems for industrial cutting, welding, and engraving due to their low optical absorption and high thermal stability.
  2. Imaging Systems (FLIR):
    ZnSe is a critical component in forward-looking infrared systems, providing accurate thermal imaging in defense, aerospace, and surveillance applications.
  3. Medical Optics:
    ZnSe crystals are used in medical laser systems, including CO₂ surgical lasers for precise cutting and tissue ablation.
  4. Astronomy and Night Vision:
    ZnSe’s excellent transmission properties make it suitable for infrared telescope lenses and night vision devices, enabling detailed imaging in low-light environments.
  5. Custom Coating Solutions:
    ZnSe crystals can be coated with anti-reflection coatings to enhance performance in specialized laser optics and thermal imaging systems.

Chemical and Structural Properties

Property

Value

Material Grade

CVD ZnSe

Maximum Crystal Size

Ø300 mm

Growing Method

CVD

Density

5.27 g/cm³

Knoop Hardness

105 kg/mm²

Transmittance Range

0.55 μm – 20 μm

Thermal Expansion

7.1 × 10^-6 /°C

Surface Flatness

λ/8 @ 632.8 nm

Surface Quality

40-20

Clear Aperture

>90%

Parallelism

<1′

Bevel Angle

<0.25 × 45°

Customization

Available upon request

Optical, Laser and Nonlinear Optical Properties

Optical Property

Value

Transmission Range

0.55 μm – 20 μm

Refractive Index

n = 2.402 @ 10.6 μm

Thermal Conductivity

18 W/m·K

Reflection Loss

<0.2% per surface

Damage Threshold

>10 J/cm² @ 10 ns

Standard Fabrication Specifications

Specification

Value

Dimensional Tolerance

±0.1 mm

Surface Flatness

λ/8 @ 632.8 nm

Parallelism

<1′

Surface Quality

40-20

Bevel Angle

<0.25 × 45°

Clear Aperture

>90%

Spectrum Transmission Curve:

The spectrum transmission curve of ZnSe crystals showcases a broad and efficient transmittance range from 0.55 μm to 20 μm. The curve highlights the material’s ability to maintain over 90% transmittance across this range, making it ideal for applications like CO₂ lasers and thermal imaging

Coating Specification:

 

  • Anti-Reflection Coatings: Available for wavelengths ranging from 2 μm to 15 μm.
  • Material Options:
    • Calcium Fluoride: 1 mm, 2 mm, 3 mm.
    • Barium Fluoride: 1 mm, 2 mm, 3 mm.
    • Magnesium Fluoride: 1 mm, 2 mm, 3 mm.
    • Lithium Fluoride: 1 mm, 2 mm, 3 mm.
  • Adhesion Test Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.

POC Strength and Capabilities

 

Photonics On Crystals (POC) is a leading provider of high-performance ZnSe crystals. With advanced manufacturing facilities and extensive expertise in optical materials, POC ensures superior quality, precision fabrication, and customizable solutions for clients across various industries. Our focus on innovation and quality assurance has positioned us as a trusted partner for demanding optical and laser applications.

Standard Products

Size (mm)

Coating

Price (USD)

SKU

10 × 10 × 1

AR Coating (2-15 μm)

300

ZNSE-1010

20 × 20 × 2

AR Coating (2-15 μm)

450

ZNSE-2020

50 × 50 × 2

AR Coating (2-15 μm)

700

ZNSE-5050

Custom Size

Upon Request

TBD

CUSTOM-ZNSE

POC-OC-122475-ZnSe Crystal

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