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Photonics Spectra
Mar 2001
Qioptiq Photonics GmbH & Co. KG
oLenses CaF2 lenses from Linos Photonics GmbH now come standard with a high-power double-band antireflection coating. This coating has fundamentals at 157 and 193 nm, making the lenses suitable for use with fluoride excimer or argon-fluoride excimer lasers. The surfaces have a 4-rhomb polish and microroughness ranging from 0.3 to 0.4 nm, resulting in low ambient illumination levels compared with absorption. These planoconvex lenses for the DUV range have a 50-mm diameter and are available in 200-, 300- and 500-mm focal lengths.

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