| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light receiving pipe for a solar light collecting device capable of improving heat efficiency by cutting heat loss due to radiation from a light absorbing pipe. Ž<P>SOLUTION: As an optical layer 6 is formed on an outer face of a transparent pipe 3, the visible light and the like A (light near visible light and light at ultraviolet ray-side with respect to visible light) occupying the most part of the solar light L, penetrates through the optical layer 6, and is brought into contact with the light absorbing pipe 4. The infrared ray B is reflected. The light absorbing pipe 4 is heated by the penetrating visible light and the like A, and emits radiation heat from a surface. As the most of the radiation heat is the infrared ray B having a wavelength longer than that of the visible light and the like A, it can not penetrate through the optical layer 6, and is reflected to a light absorbing pipe 4 side again by the optical layer 6. As the heat absorbing pipe 4 is heated by the reflected radiation heat repeatedly, the light absorbing pipe 4 is heated, and heat efficiency can be improved. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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