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
