TESTING METHOD BY A SPECTROSCOPIC PHOTOMETRY USING THREE WAVELENGTHS OF LIGHT AND A DEVICE FOR SAID METHOD

摘要

Title of the InventionA testing method by a spectroscopic photometry usingthree wavelengths of light and a device for said methodAbstract of the DisclosureFor detecting a leaking in a transparent or semi-trans-parent vessel by the dye bath method, the light passingthrough the vessel is divided into three wavelength regions,that is light having the characteristic wavelength of thedye bath liquid, the light having a wavelength shorter thansaid light as much as prescribed wavelength and the lighthaving a wavelength longer than said light as much as pre-scribed wavelength, the curvature of transmittance curvebased upon difference value of transmittance among threelight having different wavelength is obtained for comparingwith a preestablished value to judge the vessel to be in-ferior or normal with the compared output.