Patent ID: 6697514
Filing Date: 2004-02-24
Classification: G01N,G06T

Abstract:
An apparatus for inspecting a coating of a fluorescent substance on a subject to be inspected, comprising:a table for supporting the subject to be inspected; an illumination device for irradiating UV light onto the fluorescent substance for causing the fluorescent substance to emit light; an imaging device for imaging an image of light emission of the fluorescent substance; and a plurality of filters provided between the imaging device and the subject, the plurality of filters allowing only light of specified wavelengths, in accordance with light emission characteristics of the fluorescent substance, pass toward the imaging device, wherein the plurality of filters include a first filter that passes only light of wavelengths 580 to 660 nm, a second filter that passes only light of wavelengths 500 to 580 nm, and a third filter that passes only light of wavelength 400 to 500 nm.