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 AR coated sapphire windows


Home > Products > Windows > Sapphire Windows

Sapphire Optical Windows


Substrate characteristics of sapphire optical windows

The substrate of the sapphire optical window is a synthetic sapphire crystal (Al2O3). Synthetic Sapphire is a crystal that is second only to diamonds in hardness. It is a single-crystal form of Al2O3, pure and transparent. Excellent mechanical, optical, physical and chemical properties make sapphire an ideal material for high-performance system design and application. Sapphire is the best choice for a wide range of harsh environmental applications compared to other optical materials.

About sapphire optical windows

Sapphire optical windows are ideal for applications where high pressure, vacuum, or corrosive atmospheres are a consideration. Sapphire windows will exceed all other optical materials in harsh environments, providing a better barrier between elements. Creator Optics can make various sapphire optical windows according to special requirements and drawings. All of these sapphire windows have high-precision polished surfaces, surface accuracy and parallelism.

Common sapphire optical windows

Creator Optics has many years of experience in sapphire optical window production. These customized sapphire windows can be selected with KY, CZ, HEM sapphire crystals, and C plane, R plane, A plane cutting. The main types of customized sapphire windows are as follows:

Typical applications of sapphire optical windows:
  • Aerospace: Because of its perfect durability and corrosion resistance, high temperature resistance, but also a very wide range of spectral transmission, sapphire windows are widely used in aerospace equipment and instruments.

  • Sapphire flash lamps: Sapphire's high temperature resistance and low thermal expansion rate make it a protective window for high-strength lamps as well as flash lights. Scratch resistant, no burst.

  • Applications of analytical instruments: In many analytical cases, the gas or liquid analysed is highly corrosive. The sapphire window is perfectly corrosion-resistant and is widely used in such analytical instruments. In addition, sapphire window has a good transmittance from ultraviolet to infrared wide spectrum, which makes it more widely used in spectral range.

  • Applications of medical equipments: Due to its excellent durability, sapphire windows are widely used in a variety of medical applications such as laser medical instruments, laser beauty instruments and endoscopes.

  • Optical applications: Because of the wide spectral range of sapphire crystals, sapphire windows can be used in all kinds of optical applications, from ultraviolet to infrared. In terms of mechanical and physical properties, it has an advantage over the optical windows of other materials.

  • Illumination applications: Sapphire window has a good heat resistance, for very high brightness lighting, it is a good protection window material.

  • Watchs and industry instruments: Sapphire windows are considered to be protective covers for watches or gauges and are resistant to scratches, robustness and non-bursting.
Specifications of sapphire optical windows:
Specifications S1 S2
Diemensions Diameter from 1mm to 150mm, customized available
Thickness 0.2mm to 50mm , customized available
Diameter Tolerance ±0.05mm
Thickness Tolerance ±0.05mm
Edge of Sapphire Windows fine ground or polished fine ground or polished
Chamfer minmium 0.2 x 45° minimum 0.2 x 45°
Flatness / Surface Accuracy λ/4 per inch @633nm λ/4 per inch @633nm
Parallelism 30 arc second
Surface Qulitity 20/10 20/10
Clear Aperture ≥90% ≥90%
Coating for Sapphire Windows Antireflection coating at the design wavelength, AR, BBAR, Dual wavelength AR, Laser damage resistant AR

   * Detailed characteristics of sapphire monocrystal >>>

* Inquire about in-stock products of sapphire optical windows, please download the PDF inventory sheet or contact our sales engineers directly.

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