| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a conventional skin measurement system can only measure a small area and for instance, it is difficult to be used as a reference during foundation application.SOLUTION: A first light source having a peak wavelength from a wavelength of 700 nm to 1,100 nm and a second light source having a peak wavelength from a wavelength of 350 nm to 700 nm irradiate skin of such as a face in order. A signal obtained by measuring reflected light of the skin by irradiating the skin with light from the first light source and a signal obtained by measuring the reflected light of the skin by irradiating the skin with light from the second light source are subjected to a difference computation process. Accordingly, spots and freckles or the like on skin in a large area such as a face can be measured by a relatively inexpensive system. |
