RADIATION RESISTANT LENS AND RADIATION SHIELD, LENS MODULE AND TELEVISION CAMERA FOR HIGH RADIATION ENVIRONMENT USING THE RADIATION RESISTANT LENS AND RADIATION SHIELD

摘要

PPROBLEM TO BE SOLVED: To provide a radiation resistant lens formed of an optical material, which is less likely to cause radiation-derived browning despite its high refractive index, a radiation shield and a lens module and a television camera for a high radiation environment using the radiation resistant lens and the radiation shield. PSOLUTION: The radiation resistant lens or the radiation shield is formed of any one of a light transmissive ceramic produced by sintering a material having a composition comprising a main component represented by general formula Baä(SnSBu/SBZrSB1-u/SB)SBx/SBMgSBy/SBTaSBz/SB}SBv/SBOSBw/SB, wherein (w) is a positive number for keeping electric neutrality, with satisfying x + y + z = 1, 0.100x0.700, 1.80z/y2.20, 1.00v1.05, and ux0.05, a YAG crystal or a lithium tantalate crystal. The lens module and the television camera for the high radiation environment use the radiation resistant lens or the radiation shield. PCOPYRIGHT: (C)2008,JPO&INPIT