| 摘要 |
PROBLEM TO BE SOLVED: To provide a pyrheliometer that is less likely to have observation errors generated, even if the pyrheliometer is installed in an outdoor space, or the like over a long term, and that reduces the number of maintenance times. SOLUTION: The pyrheliometer comprises a substrate, a sensor arranged on the substrate, a diffusion plate arranged on the sensor, and a glass dome that is positioned on the diffusion plate and covers the substrate, the sensor, and the diffusion plate. In this case, a photocatalyst, which is hydrophilized according to photoexcitation, is provided on the surface of the glass dome. COPYRIGHT: (C)2007,JPO&INPIT
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