customized size diameter φ350mm dia300mm A-axis C-axis round shape double side poilished Al2O3 sapphire optical glass lens window
1. what is sapphire ?
Sapphire is a material of a unique combination of physical, chemical and optical properties,
which make it resistant to high temperature, thermal shock, water and sand erosion, and scratching.
It is a superior window material for many IR applications from 3µm to 5µm.
C-plane sapphire substrates are widely used to grow III-V and II-VI compounds such as GaN for
blue LED and laser diodes, while R-plane sapphire substrates are used for the hetero-epitaxial
deposition of silicon for microelectronic IC applications.

2. specification for optical lens
Diameter 0.2-350mm or customization for round
square 5x5mm~400x500mm
Diameter tolerance +/-0.1mm or +/-0.02mm
Thickness 0.10-100mm
Thickness tolerance ± 0.1mm or +/-0.02mm
Surface quality (scratch & dig) 60/40, 40/20 or better
Surface accuracy λ/10, λ/2, λ
Clear Aperture >85%, >90%
Parallelism +/-3' ,+/-30''
Bevel 0.1~0.3mm×45 degree
coating AR, BBAR or upon customer request( UV, VIS, IR)
specification for led

3. Applications
--For LED substrate application
--Sapphire wafer and substrate applications include:
--Microelectronic IC applications - SOS Silicon-on-Sapphire
--Growth of superconducting compounds / Gallium Nitride - Infrared detectors
-- Hybrid microelectronics - Polishing carriers
--Hostile environment
--Optical transmission from ultraviolet to near infrared
--High temperature
--Radiation resistance

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