Uncoated sapphire windows sapphire blank material

Sapphire is an extremely hard material with transmission of over 80% in the 2-5µm wavelength range.

Sapphire Optical Round Window manufactured from single crystal sapphire, Sapphire Infrared Window is ideal for demanding applications (such as laser systems) because of their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis. 

Sapphire is the second hardest crystal next to diamond and, because of their structural strength, sapphire optical round window can be made much thinner than other common Standard Optical Windows with improved transmittance. Chemically, sapphire is single crystal aluminum oxide (Al2O3) and is useful in a transmission range from 0.33 - 5.5μm when uncoated. Sapphire optical round Window available with anti-reflection (AR) coatings to improve performance in the visible, NIR, and IR spectra with coating options covering 400 - 5000 nm.

Specification of our optical round window or infrared window as follow:

*Material:high borosilicate glass standard Optical Windows, High Purity Silica Windows, B270 glass optical round window, BK7 glass window,UV-grade fused silica optical windows, or other infrared window.
*Length tolerance:+/-0.01
*Width tolerance:+/-0.01
*Center thickness tolerance: 0.005 mm
*Surface quality:80-50 to 10-5 Scratch/Dig
*Surface flatness:
*Parallelism<=1 min -- 2 sec
*Clear Aperture :80% -- 100%