| 摘要 |
PROBLEM TO BE SOLVED: To provide a broadband reflecting mirror having high reflectivity in a frequency band with a wavelength of 400-2,500 nm, and having excellent heat resistance and flaw resistance. SOLUTION: The broadband reflecting mirror 1 for reflecting light of a frequency band with a wavelength of 400-2,500 nm includes: a first reflection stacking film 3 for reflecting the light of frequency band at the short wavelength side in the frequency band with a wavelength of 400-2,500 nm in which a first high refractive index material layer and a first low refractive index material layer are alternately stacked; and a second reflection stacking film 4 for reflecting the light of frequency band at the long wavelength side in the frequency band with a wavelength of 400-2,500 nm in which a second high refractive index material layer and a second low refractive index material layer are alternately stacked. The first reflection stacking film 3 is disposed at the incidence side of light, the second reflection stacking film 4 is disposed at a position to reflect the light transmitted through the first reflection stacking film 3, and each refractive index material of both reflection film layers is suitably selected. COPYRIGHT: (C)2010,JPO&INPIT
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