| 摘要 |
PROBLEM TO BE SOLVED: To enhance reproducibility of color information of a color product. SOLUTION: This interference filter is designed in such a manner that the X-component of the light to be measured in XYZ color system which is composed of 0.10 in wavelength regions of 519-528 nm and 660-673 nm, 0.25 in wavelength regions of 533-542 nm and 645-657 nm, 0.50 in wavelength regions of 552-562 nm and 630-642 nm, 0.75 in wavelength regions of 568-578 nm and 616-628 nm, and 1.00 in a wavelength region 591-604 nm is transmitted, where the maximum value of the transmittance of film in a wavelength region 400-700 nm is set to be 1.00 with respect to the incident light in parallel with an optical axis.
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