OPTICAL ELEMENT FOR LIGHT-CONCENTRATING SOLAR POWER GENERATION DEVICE, METHOD FOR PRODUCING SAME, AND LIGHT-CONCENTRATING SOLAR POWER GENERATION DEVICE

摘要

Provided are: an optical element for a light-concentrating solar power generation device having excellent weather resistance as well as excellent thermal-shock resistance and crack resistance; a method for producing the optical element; and a light-concentrating solar power generation device provided with the optical element. This optical element for a light-concentrating solar power generation device is characterized by comprising a glass material having compressive stress on the surface thereof.