The SAW23 is a Sapphire Window, 25.00 mm in diameter and 2.30 mm thick, uncoated. Sapphire windows are ideal for applications where high pressure, vacuum, or corrosive atmospheres are a consideration. Sapphire, a single crystal form of Al2O3, is resistant to attack by strong acids due to its high dielectric constant. It has high compressive strength and a high melting point. It is also resistant to UV radiation darkening. Please note these sapphire windows are provided in random axis orientation by default and its birefringent nature could affect the polarization state of your application.
Технические характеристики
- Diameter 25.0 mm
- Material Sapphire
- Antireflection Coating Uncoated
- Surface Flatness 2&lambda, @ 633 nm
- Surface Quality 80-50 scratch-dig
- Thickness 2.3 mm
- Thickness Tolerance ± 0.10 mm
- Parallelism &le,3.5 arc min
- Cleaning See How to Clean Optics
- Clear Aperture Central 90% of diameter
- Diameter Tolerance ± 0.10 mm
- Birefringence 0.008 for visible light orthogonal to optical axis
- Edge Finish Ground and beveled
- Surface Roughness 0.1 m per inch
- Thermal Expansion Coefficient 8.4 x 10-6 K-1
- Thermal Limit 22 W m-1 K-1
- Wavelength Range 150 to 5000 nm
