Abstract: Provided is a method of producing prepreg including: inspecting, with an optical device, in a resin sheet made of a release paper and a resin film which is formed by coating the release paper with a resin to be impregnated into a carbon fiber bundle, the surface of the resin film, detecting a defect in the surface of the resin film which would be the cause of a defect in the prepreg to be produced, and judging the type of the detected defect; or inspecting, with an optical device, the surface of the prepreg after the release paper is separated from the prepreg sheet which is formed by impregnating a resin forming the resin film into the carbon fiber bundle, detecting defects in the surface of the prepreg, and judging the type of the detected defect.

Abstract: The method for inspecting a length-measurable product includes manufacturing the length-measurable product 1 whose length at least in one direction can be measured, when a defect 4 occurs in the length-measurable product 1, applies a marking 6 to a length-measurable product 1 having the defect 4, and includes the steps of detecting presence of a defect 4 in the length-measurable product, measuring a length of the length-measurable product 1 at least in one direction, and applying a marking to a predetermined marker area 5 in a length direction of the length-measurable product 1 having the defect 4, on the basis of positional information on the defect obtained in the defect detecting step and length measurement information obtained in the length measuring step.

Abstract: Provided is a manufacturing method for a bundle product that includes an inspecting step of inspecting two or more threads continuously running in parallel in the longitudinal direction, a collecting step of collecting the threads, and a cutting step of cutting, after completion of the collecting, all the collected threads at a predetermined position, to obtain a bundle product having plural threads converged into a bundle. In the manufacturing method, an amount of collection in the collecting step is adjusted on the basis of inspection results obtained in the inspecting step so that at least one managed quantity for plural threads selected from a group including a total number, a total weight, a representative weight, a total outside diameter value, a representative outside diameter value, a total surface area, and a representative surface area of the plural threads constituting the bundle product exceeds a predetermined value.

Abstract: Provided is a method of producing prepreg including: inspecting, with an optical device, in a resin sheet made of a release paper and a resin film which is formed by coating the release paper with a resin to be impregnated into a carbon fiber bundle, the surface of the resin film, detecting a defect in the surface of the resin film which would be the cause of a defect in the prepreg to be produced, and judging the type of the detected defect; or inspecting, with an optical device, the surface of the prepreg after the release paper is separated from the prepreg sheet which is formed by impregnating a resin forming the resin film into the carbon fiber bundle, detecting defects in the surface of the prepreg, and judging the type of the detected defect.

Abstract: A method of inspecting a display panel having a substrate and a plurality of fluorescent layers including measuring bright and dark signals reflected by the fluorescent layers while moving the substrate or an illuminating means generating the signals and an imaging means receiving the signals in a direction across the plurality of fluorescent layers at predetermined intervals, and measuring an application volume for each fluorescent layer from the signals obtained by the imaging means.

Abstract: An object of the present invention is to provide a display panel inspection method, a display panel inspection device, and a display panel manufacturing method capable of determining the optimum optical conditions for inspecting a surface shape from the structural characteristic of an object to be inspected, reflecting the determined conditions on the inspection device to carry out the inspection with high accuracy, improving the yield without degrading the yield rate, and manufacturing a substrate of high quality and high reliability.