Patent ID: 7534733
Filing Date: 2009-05-19
Classification: C03B,C03C

Abstract:
1. A synthetic silica glass optical material for use, and resistant to optical damage, in the wavelength region of less than 250 nm, the synthetic silica glass optical material consisting essentially of synthetic silica glass, H 2 , and OH, the synthetic silica glass optical material having a H 2 concentration less than about 5.0×10 17 molecules/cm 3 , wherein the synthetic silica glass optical material is loaded with H 2 at temperature of less than about 600° C., having an OH concentration less than about 600 ppm, and exhibiting a laser induced wavefront distortion, measured at 633 nm, of between −1.0 and 1.0 nm/cm when subjected to 10 billion pulses of a laser operating at approximately 193 nm and at a fluence of approximately 70 μJ/cm 2 .