Sapphire Prisms

Sapphire Prisms

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Sapphire

  1. Exceptional Optical Transmission

    • Exhibits very high transmittance (up to 85–90%) in the visible range (400–700 nm) and into the near-infrared (up to 5 µm).

    • Stable refractive index (n ≈ 1.76 @ 590 nm) with low dispersion, ensuring precise beam deviation and dispersion control inside the prism.

  2. Ultra-High Hardness and Wear Resistance

    • Boasts Mohs hardness of 9 (second only to diamond), making it resistant to scratches and impacts under harsh conditions.

    • Maintains geometric accuracy and optical performance under high mechanical stress or vibration environments.

  3. Outstanding Thermal Stability

    • Very low thermal expansion coefficient (≈ 5.6 × 10⁻⁶/K), allowing stable operation across a wide temperature range (–200 °C to +200 °C).

    • High thermal conductivity (≈ 25 W/m·K) effectively dissipates heat, suitable for high-power laser systems.

  4. Chemical Inertness and Corrosion Resistance

    • Chemically stable in most acids, alkalis, and organic solvents, resisting corrosion or leaching.

    • Compatible with various optical coating processes (anti-reflective coatings, high-reflectivity coatings), with coatings adhering firmly.

Primary Applications

  • Laser Optics: Used as polarizing prisms, beam splitters/combiners, and beam steering prisms paired with high-power laser systems—resisting deformation and cracking.

  • Precision Measurement & Spectroscopy: Employed in laboratory optical instruments for spectral dispersion, polarization measurement, and calibration, ensuring long-term stability and accuracy.

  • UV/IR Optical Systems: Due to its wide-band transmission, sapphire prisms enable specialized imaging or sensing in ultraviolet (UV) and far-infrared (FIR) wavelengths.

  • Aerospace & Defense Equipment: Installed in inertial navigation units, optical sensor windows in aircraft, and radar system modules—withstanding high temperatures and intense vibrations.

  • High-End Consumer Electronics: Found in smartphone camera lens windows and optical fingerprint sensors, where scratch resistance and screen compatibility are critical.

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