Round Sapphire Windows for aerospace, medical, and industrial applications
  • High strength, high hardness, high temperature resistance
  • Abrasion resistance, corrosion resistance
  • Maximum diameter 600mm
  • Good light transmission performance (150 ~ 5500 nm)
  • Excellent electrical insulation performance, and good mechanical properties
  • Sapphire(Round sapphire windows) has better light transmittance in the wavelength range of 0.20 - 5.50 μm and the infrared transmittance hardly changes with temperature. Round sapphire windows can be found in applications across the whole optical industry as well as in the field of measurement and analytical instrumentation which are often used in aerospace, medical, and industrial applications.

    High-quality sapphire material has a series of characteristics such as high strength, high hardness, high temperature resistance, abrasion resistance,corrosion resistance, good light transmission performance (in the 170nm ~ 6000 nm), excellent electrical insulation performance, and good mechanical properties.' The chemical performance is very stable, free from acid and alkali corrosion. The hardness of sapphire is high, with Mohs hardness level 9, second only to diamond (level 10).

    Round sapphire windows are respected for their outstanding characteristics, making them highly searched for in a multitude of optical and industrial ventures. Their remarkable toughness and resistance to scrapes make them most ideal for use in one of the most attempting of situations. In addition, their optical quality and passage are genuinely remarkable, making it possible for the flow of light with utmost sparkle and marginal distortion.

    Advantages of Round Sapphire Windows

    The sapphire windows with round shape produce by HYT Sapphire have a series of excellent characteristics, such as high strength and hardness, the high-temperature resistance abrasives, good corrosion resistance ability, excellent light penetrability, and electric insulation performance. The maximum diameter we supply is up to dia. 600 mm.

    Our advanced techniques for polishing super Round Sapphire Windows allow us to achieve exceptional optical precision, ensuring minimal surface imperfections and no damage to the surface or subsurface. We can produce sapphire round windows with diameters of up to 200mm, with surface accuracy reaching as fine as 0.1 lambda (at a wavelength of 633 nm), and surface quality ratings as high as 10/5 MIL.


    High Quality Round Sapphire Windows


    Round Windows Diagram

    Specifications of Round Sapphire Windows

    Material Sapphire (Al2O3)
    Diameter 2mm ~ 600mm
    Diameter Tolerance +/-0.02 mm
    Thickness 0.1mm ~ 100mm
    Thickness Tolerance +/-0.01 mm
    Surface Quality 60/40, 40/20 or 20/10 S/D
    Parallelism 30 arc sec
    Chamfer < 0.2 mm x 45°
    Coating No coating or custom coating request

    Price list and specification index of Round Sapphire Windows

    If need other specifications and quantities products, please contact us(
    Part Number Dia. Thickness (mm) Coating Price
    Rou-Win-Sapphire-001 Φ12.50 mm 1.00 mm Uncoated $42.00
    Rou-Win-Sapphire-002 Φ20.00 mm 2.00 mm Uncoated $72.00
    Rou-Win-Sapphire-003 Φ25.40 mm 1.00 mm Uncoated $118.00
    Rou-Win-Sapphire-004 Φ50.00 mm 1.00 mm Uncoated $390.00
    Rou-Win-Sapphire-005 Φ50.00 mm 1.00 mm AR@400 - 700nm $428.00
    Rou-Win-Sapphire-006 Φ150.00 mm 3.00 mm Uncoated $1920.00


  • Anti-reflection coatings are also available at your specified wavelength.
  • Sapphire transmits ultraviolet light, but sometimes exhibit fluorescence when subjected to powerful ultraviolet sources. For this reason, they are best suited for use with visible to infrared wavelengths.
  • Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
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    HYT Sapphire Optics focused on the precision manufacturing of high-quality sapphire components, and strived to create sapphire optical windows, fine holes, rods, balls, tubes and other automated, intelligent products and chemical production line.