ZnSe (Zinc Selenide) positive meniscus lenses are high-performance optical elements manufactured from high-purity chemical vapor deposition (CVD) laser-grade material. Designed with a convex front surface and a concave rear surface, these lenses effectively minimize spherical aberration when used in high-power laser systems, producing a smaller focal spot size and superior beam-focusing precision.

Technical Applications & Industrial Use Cases

Due to their exceptional thermal stability, low absorption coefficient, and ability to shorten focal lengths while maintaining high image quality, ZnSe positive meniscus lenses are widely deployed across demanding sectors:

  • High-Power CO2 Laser Systems: Act as primary focusing lenses in industrial CO2 laser cutting, welding, and engraving machines operating at 10.6 micrometers.
  • Thermal Imaging & Sensing: Utilized in thermal cameras, infrared detectors, and optical pyrometers requiring precise focal stability across mid-to-far infrared bands.
  • Medical & Scientific Instrumentation: Deployed in infrared spectroscopy and medical laser delivery assemblies where beam waist minimization and thermal lens mitigation are critical.

Key Specifications & Performance Advantages

  • Material: CVD Laser-Grade Zinc Selenide (ZnSe) optimized for high-power infrared applications.
  • Design Wavelength: Engineered specifically for 10.6 micrometer laser systems with strict focal length tolerance
  • Surface Quality: High-precision 60-40 scratch-dig with tight centration tolerance (< 3 arcmin) and protective chamfers.
  • Coating Options: Available uncoated or featuring specialized low-absorption infrared anti-reflective (IR2) coatings (average reflectance < 1.5% across 8 to 12 micrometers) to maximize throughput.

Download Datasheet of Meniscus Lens