| 摘要 |
A method for easily estimating a state of an ultraviolet curing resin material is provided to be particularly applicable to a wide range of ultraviolet curing resin materials. A method comprises the steps of: (a) irradiating an ultraviolet ray to an ultraviolet curing resin material including a main agent selected from at least one of a monomer and an oligomer and a photo polymerization initiator; (b) detecting a fluorescent light emitted from the photo polymerization initiator when receiving the ultraviolet ray irradiated in the irradiating step; and (c) estimating the state of the ultraviolet curing resin material based on the fluorescent light detected from the step(b). In the method, the step(a) includes irradiating an ultraviolet ray for detection so as to detect the fluorescent light emitted from the photo polymerization initiator and periodically being changed in intensity, and the step(b) includes a light receiving sub step of receiving a light emitted from the ultraviolet curing resin material and an extracting sub step of extracting a periodic component corresponding to a period of change in the intensity of the ultraviolet ray for detection as the fluorescent light, from the light received in the light receiving step.
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