| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for evaluating translucency of an object with a higher degree of precision than the conventional method.SOLUTION: Ratios r/Iand r/Iof irradiation light quantity I,Ifor each of a first radiation area and a second radiation area to emission light quantity r,remitted by each of the first radiation area and the second radiation area are calculated, and translucency of an object is evaluated on the basis of difference of a value of 1-(r/I)/(r/I). Emission light quantity rand rat the time when light is irradiated on a reference white board is used as emission light quantity I,I. A board which has a reflectance ratio larger than 0.5 and has a region of 0.2 mm or smaller in thickness containing a light receiving surface is used as the reference white board. |
