Patent ID: 9234680
Filing Date: 2016-01-12
CPC Classification: C23C,F24S,G02B,Y02E

Claim Text:
1. A solar light reflecting plate having a bent to a predetermined curvature radius and condensing the solar light on a focal point used for a light condensing and heat collecting device which includes a solar light reflecting plate that reflects and condenses solar light and a heat collecting tube positioned on the focal point that receives the solar light condensed by the solar light reflecting plate and is heated by the condensed solar light, wherein (1) the solar light reflecting plate comprises at least a rolled substrate, (2) a surface roughness of a solar light reflecting surface that is an outermost surface and reflects solar light is from 0.02 μm to 1.0 μm range in terms of arithmetic mean roughness Ra, and (3) the solar light reflecting plate is disposed so that an angle between a rolling direction of the substrate and a longitudinal direction of the heat collecting tube is from 80° to 100° range.