Basis weight measuring device and basis weight measuring method

摘要

PROBLEM TO BE SOLVED: To provide a basis weight measuring device capable of measuring the basis weight of a measurement object with a relatively simple configuration. SOLUTION: This is a basis weight measuring device 1 for measuring the basis weight of an object to be measured, the substrate 110, the lens holder 120 arranged on the substrate 110, and the lens 130 arranged on the upper surface side of the lens holder 120. The light emitting element 140, the first light receiving element 151 that receives the first reflected light from the lens holder 120 with respect to the irradiation light of the light emitting element 140, and the second reflected light from the measurement object with respect to the irradiation light of the light emitting element 140. The second light receiving element 152 that receives the P wave component, the third light receiving element 153 that receives the S wave component of the second reflected light, and the P wave component and the S wave component of the second reflected light are subtracted from the first reflected light. It is characterized by including a measuring unit 200 for calculating pseudo-transmitted light of a measurement object and measuring the basis weight based on the pseudo-transmitted light. [Selection diagram] Fig. 1