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High transmittance across mid-infrared (2–16 µm) and visible to near-IR (0.5–0.7 µm) spectral ranges.
Chemically inert and resistant to most acids (except HNO₃/HClO₄ mixtures) and alkalis under ambient conditions.
Low absorption coefficient (< 0.0005 cm⁻¹ at 10.6 µm), ensuring minimal thermal lensing in high-power CO₂ laser applications.
Hardness of ~120 Knoop, providing robust mechanical protection for underlying optical components.
Non-hygroscopic—does not absorb moisture from ambient air, eliminating fogging or surface degradation without hermetic sealing.
Protective cover for CO₂ laser output windows in industrial cutting, welding, and engraving systems.
Front-end barrier in FTIR spectrometers operating in the mid-IR fingerprint region.
Environmental isolation window for semiconductor process monitoring sensors exposed to reactive plasma environments.
Beam-delivery interface in medical laser systems (e.g., dermatology and ablation devices) requiring sterile, non-toxic optical access.
Hermetic viewport for vacuum chambers used in thin-film deposition and analytical instrumentation.
| Chemical Type | Zinc Selenide (ZnSe), ultra-pure polycrystalline grade |
| Product Form | Rectangular optical window plate (uncoated standard; AR-coating optional) |
| Appearance | Translucent amber to pale yellow, optically homogeneous, scratch-dig compliant per MIL-PRF-13830B (60-40) |
| Melting Point | 1525 °C (decomposes before full melting; stable up to 350 °C in inert atmosphere) |
| Primary Applications | Infrared transmission, laser beam protection, environmental isolation in optical systems |
| Key Features | Wide IR transparency, low dispersion, non-hygroscopic, radiation-resistant |
| Benefits | Extends lifetime of sensitive optics, reduces system downtime, eliminates desiccant maintenance |
| Regulatory Compliance | RoHS 2015/863/EU compliant; REACH SVHC-free; no intentionally added cadmium or lead |
| Common Compatible Systems | Suitability |
| CO₂ Laser Cutting & Welding Systems (e.g., Trumpf TruLaser, Bystronic Byspeed) | Highly Recommended – Optimized for 10.6 µm transmission and high-power thermal stability |
| FTIR Spectrometers (e.g., Thermo Nicolet iS50, Bruker Tensor II) | Highly Recommended – Minimal spectral interference in 4000–600 cm⁻¹ range |
| Plasma Etch Process Chambers (e.g., Lam Research 2300, Applied Materials Centris) | Recommended – Resists Cl₂/CF₄ plasma exposure with appropriate cooling design |
| Vacuum Deposition Viewports (e.g., Kurt J. Lesker Lab18, Angstrom Engineering AXXIS) | Suitable – Compatible with UHV bake-out cycles ≤150 °C; requires metal gasket sealing |
Q1: What is the CAS Registry Number for ZnSe used in this protective plate?
A: The CAS number for zinc selenide is 1315-09-9. This applies to the high-purity ZnSe material used in our optical-grade rectangular plates.
Q2: Is ZnSe subject to extractable or leachable concerns in contact with process gases or solvents?
A: Under standard operating conditions (≤80 °C, non-oxidizing atmospheres), ZnSe exhibits negligible leaching. No detectable Zn²⁺ or Se²⁻ migration occurs in IPA, acetone, dry N₂, or Ar — confirmed by ICP-MS testing per USP <661.1>.
Q3: How does ZnSe compare to Ge or CaF₂ for IR window protection in high-humidity environments?
A: Unlike hygroscopic CaF₂ or Ge (which oxidizes above 100 °C), ZnSe is non-hygroscopic and maintains surface integrity without coating in RH ≤95% — making it superior for uncontrolled ambient or purge-air-only installations.
Q4: Does this product carry ISO 13485 or FDA device listing for medical laser use?
A: While the ZnSe plate itself is a passive optical component (not a finished medical device), it complies with ISO 10993-5 (cytotoxicity) and USP <661.1> for material safety. It is supplied with full CoA and is widely integrated into FDA-cleared laser systems as a Class I exempt component.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
