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Description

Zinc Selenide (ZnSe) right-angle prisms are high-performance optical components crafted from ZnSe. Designed with a 90° angle between two perpendicular surfaces and a hypotenuse for light reflection/refraction, these prisms enable precise beam manipulation (e.g., 90° beam deflection, image inversion, or light splitting) in infrared optical systems.Manufactured via advanced crystal growth, grinding, and polishing techniques, ZnSe right-angle prisms feature ultra-low absorption, minimal scatter, and high resistance to thermal shock. Their non-hygroscopic, chemically stable structure ensures reliable performance in harsh environments (e.g., high temperatures, corrosive atmospheres), making them a preferred choice for demanding infrared applications where glass optics fail due to high absorption in the MIR range.

Factory Custom Optical ZnSe Right Angle Prisms

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Specifications

Material: ZnSe
Max Dimensions (A): 12.7 mm
Max Dimensions (B): 18 mm
Max Dimensions (C): 6 mm
Diameter Tolerance: +0/-0.1mm
Surface Quality: 60/40or 40/20
Surface Flatness: 1/4λ
Parallel: 30 Arc Sec
Chamfer: 0.1-0.3mm x 45°

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Features

  • High Infrared Transmission: ZnSe prisms offer excellent transparency in the mid-to-far infrared spectrum (e.g., 2-20 μm).
  • Low Absorption Loss: Minimal energy loss during light propagation, ideal for high-power laser systems.
  • Thermal Stability: Maintains optical performance under high-temperature environments.
  • Chemical Resistance: Resistant to moisture and mild chemical corrosion.
  • Precision Geometry: 90° angle accuracy ensures reliable beam steering and reflection.

Applications

  • CO₂ Laser Systems: Widely used for beam delivery and focusing in industrial/medical lasers.
  • Thermal Imaging: Enhances infrared imaging in military and surveillance equipment.
  • Spectroscopy: Key component in infrared spectrometers for material analysis.
  • Optical Testing: Utilized for alignment and calibration in optical setups.
  • Medical Devices: Applied in non-invasive diagnostic tools using infrared light.

Frequently Asked Questions

What are the key optical properties of ZnSe (zinc selenide) that make it suitable for right-angle prisms in infrared applications?
ZnSe offers broad infrared transmission (0.5–22 μm), low absorption in the MWIR/LWIR spectrum, high refractive index (~2.4 at 10 μm), and minimal scatter losses. Its chemical stability and durability further enable reliable prism performance in harsh environments.
How does the 90° tolerance of a ZnSe right-angle prism impact alignment precision in optical assemblies?
A tight angular tolerance (e.g.,
Why might a ZnSe prism with a dielectric mirror coating on its hypotenuse be preferred over an uncoated TIR design?
A dielectric coating ensures >99% reflectivity across specific angles and wavelengths, bypassing the critical angle limitations of total internal reflection (TIR). This allows flexibility in incidence angles and broadband performance.
How to handle and clean ZnSe right-angle prisms safely?
ZnSe is relatively soft，so avoid scratching—use lint-free optical wipes with anhydrous ethanol or isopropanol for gentle cleaning. Do not touch polished surfaces with bare hands (oils can damage coatings) and store in a dry, dust-free environment.

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