| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fluoride crystal molded article which has a different shape from that of a fluoride crystal base and has excellent optical properties. <P>SOLUTION: An optical member made of the fluoride crystal molded article has light transmittance per 10 mm thickness at a wavelength of 172 nm is 90% or more and at least an area of a cross section in one direction is 350×350 mm or more. The light transmittance per 10 mm thickness at a wavelength of 146 nm is 85% or more. Further, the light transmittance per 10 mm thickness at a wavelength of 126 nm is 65% or more. <P>COPYRIGHT: (C)2013,JPO&INPIT |
