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Gold(Au) Spiegel
Gold(Au) Spiegel
Optischer Spiegel

Gold(Au) Spiegel

Goldspiegel (Au) weisen eine extrem hohe Reflektivität (typischerweise >98 %) im nahen Infrarot (>800 nm) bis fernen Infrarotbereich auf, insbesondere im Bereich von 2–20 µm, und zeichnen sich zudem durch unübertroffene chemische Beständigkeit und Umweltstabilität aus. ECOPTIK bietet runde, quadratische und kundenspezifisch geformte Spiegel mit einer schützenden Goldbeschichtung in verschiedenen Größen an.

Hauptmerkmale
  • Substrate Selection
    Substrate Selection

    Monocrystalline silicon substrate: High rigidity and good thermal stability, suitable for applications requiring high power density or lightweight design; K9/fused silica substrate: Low cost and high surface accuracy, suitable for general infrared laboratory systems.

  • Extremely High Infrared Reflectivity
    Extremely High Infrared Reflectivity

    In the infrared band (2μm - 20μm), especially at 10.6μm (CO₂ laser), reflectivity typically reaches R > 98% - 99.5%. This means minimal energy loss in the infrared optical path. In the near-infrared band (800nm ​​- 1600nm), reflectivity is also typically above R > 96% - 98%, suitable for fiber lasers and optical communications.

  • Chemical and Physical Properties
    Chemical and Physical Properties

    Gold is resistant to oxidation, sulfidation, and corrosion. Pure gold films are relatively soft and easily scratched. A protective film (such as Y₂O₃, SiO₂, etc.) is usually added to the gold film to improve durability and cleanability.

  • High Laser Damage Threshold
    High Laser Damage Threshold

    In high-power CO₂ laser or fiber laser systems, it can withstand extremely high continuous power (kW level) without damage. It also possesses excellent heat dissipation capabilities.

Spektralkurve


Spezifikation von Gold(Au) Spiegel
SubstratK9/Quarzglas/ Quarzglas
Dimension2 mm bis 100 mm
Freie Öffnung>90 % der Dimension
Oberflächenqualität40/20, 20/10 Scratch-Dig
Oberflächenunregelmäßigkeitλ/2~λ/10 @632nm
Dicke1 mm bis 20 mm
Typische Anwendungsgebiete
  • High-Power Infrared Laser Systems
    High-Power Infrared Laser Systems
    CO₂ Laser Processing (10.6μm): Widely used as beam steering and focusing mirrors in industrial laser cutting, welding, and marking equipment. Gold films have extremely high reflectivity (>98%) in this wavelength band and good thermal conductivity, capable of withstanding kilowatt-level high power densities while avoiding thermal lensing effects.
  • Infrared Spectroscopy
    Infrared Spectroscopy
    Fourier Transform Infrared Spectrometer (FTIR): Used as moving and fixed mirrors in interferometers to maximize reflectivity across the entire infrared band (2-20μm), ensuring the detection intensity of weak signal samples.
  • Space Astronomy
    Space Astronomy
    Infrared telescopes and detectors on satellites often operate at low temperatures. Gold's high infrared reflectivity is highly compatible with low-temperature environments and is extremely stable in a vacuum.
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