Patent ID: 7323693

Claim:
A reaction-curable resin cured-state measuring method comprising: a step of irradiating a reaction-curable resin, serving as an object to be measured, with ultraviolet light of at least one wavelength in a range from 250 to 380 nm, branching the ultraviolet light reflected from or transmitted through the reaction-curable resin in two directions, detecting a luminance value of one-hand branched ultraviolet light as screen image data having a certain area and detecting a spectral characteristic at one specific point of the other-hand branched ultraviolet light while the reaction-curable resin is curing; a step of obtaining absorbances of the reaction-curable-resin at the one specific point from the spectral characteristic; a step of obtaining a reaction rate at the one specific point from the absorbances; a step of correlating the luminance value at the one specific point with the reaction rate; and a step of quantifying a progressing state of the curing reaction of the reaction-curable resin over an entire curing time as a screen image by comparing the luminance value as the screen image data and the reaction rate at the one specific point.