| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical element for a light-focusing type photovoltaic power generator and manufacturing method therefor, and a light-focusing type photovoltaic power generator having the same, capable of achieving excellent weatherability, and high thermal shock resistance and crack resistance. <P>SOLUTION: The optical element for a light-focusing type photovoltaic power generator is formed from glass material whose surface has compressive stress. Preferably, the compressive stress is 1-1,000 MPa. Further preferably, the surface roughness is not more than 200 nm in arithmetic average roughness (Ra). <P>COPYRIGHT: (C)2013,JPO&INPIT |
