Properties of Optical Sapphire Window:
Optical Windows are used as viewports to protect other components within an optical assembly, instrument, or laser. In certain applications, optical windows are required to withstand harsh environmental conditions and provide high levels of performance and reliability. Sapphire window has several unique properties that make it the ideal material for these applications.
1.Synthetic Sapphire, the single crystal form of Al2O3, is one of the hardest materials ( 9 Mohs hardness). Because of its structural strength, the sapphire window can be made much thinner than other common optical windows, with better transmittance performance.
2.High thermal stability and excellent thermal conductivity make the sapphire window suitable for the applications in high power. The loss in a sapphire window is less than in another common optical window.
3.Sapphire windows can withstand considerably higher temperatures than most optical windows with zero degradation.
4.Sapphire Windows will not get dark and lose their brilliancy when exposed to UV light.
5.Sapphire windows are extremely stable and resistant to attack by strong acid due to sapphire’s high dielectric constant.
6.Sapphire windows offer wideband transmission from UV to Mid-IR (0.15-5.5µm).
All these unique properties make sapphire windows the ideal material for extreme mechanical, chemical & optical applications.
Sapphire Step window Specifications:
| Product name | Sapphire Step window |
| Material | Sapphire |
| Diameter | 1-500 mm |
| Diameter Tolerance | ±0.025 mm |
| Thickness | 0.1-100 mm |
| Thickness Tolerance | ±0.025 mm |
| Parallelism | ≤3 ARC Min |
| Surface quality | DSP 60/40 |
| Chamfer | 0.1-0.3mm*45° |
| Clear Aperture | 90% |
Sapphire Components:
Sapphire's range of superior qualities make it ideal for optical and non-optical components. From the forward-facing optics of imaging systems to the thermal insulators in plasma systems, Sapphire's performance at extreme physical conditions often make it the preferred choice for the following:
Sapphire Lightguides
Sapphire offers higher working temperatures in applications such as temperature thermometry and IPL systems, with a broad transmission.
Sapphire Lenses
High optical quality Sapphire is used for lenses in systems that require durability and ruggedness where standard materials suffer from grit, impact and temperature damage. Sapphire lenses also offer high performance in laser devices, offering high thermal conductivity.
The broad transmission of Sapphire, across visible and NIR spectrums, make it ideal for FLIR imaging systems in hazardous environments, or where the reduced thickness of Sapphire lenses lead to reduced system footprint.
Sapphire Tubes
Sapphire tubes, made using the Stepanov growth method, replace glass and quartz tubes in high temperature and pressure systems such as plasma applications and insulators.
Sapphire Pins and Rods
As well as the optical proporties offered by Sapphire rods for fibre optcal and light-guide applications, the physical strength and inert nature of Sapphire make it ideal for engineering and structural uses
