May 2000CVI Melles GriotRequest Info
Excimer-grade fused-silica lenses for deep-UV applications are available from CVI Laser Corp. The standard focal lengths range from 50 to 1000 mm and can be coated or uncoated. The lenses are designed for excellent performance with a high-damage threshold for applications where UV-grade material does not hold up. The lenses have an index homogeneity less than or equal to 0.5 x 10-8, 0.39-ppm densification and an induced absorption of 0.0026 ±0.004/cm at 193 nm.