Abstract: Provided is an image recognition method for recognizing and measuring an outer shape of transparent member (11) in object (2) having transparent member (11) disposed on a surface, and the method includes irradiating object (2) with illumination light (15) from illumination device (5) configured to perform irradiation of illumination light (15) with a plurality of illumination light intensities, the illumination light intensity having one illumination light intensity based on color information of transparent member (11), among the plurality of illumination light intensities and being within illumination angle ? at which the illumination light is configured to be totally reflected in transparent member (11), imaging object (2) irradiated with illumination light (15), and recognizing the outer shape of transparent member (11) based on imaged information.

Abstract: Plate-like glass 2 having a print layer bonded to base material 5 by adhesive layer 4 can be separated in a layer form from article 1 by irradiating print layer 3 with laser light 6, carbonizing an organic component on an entire surface of the print layer through irradiation, and separating the print layer in a layer form.

Abstract: Composite resin containing cellulose is irradiated with infrared light, reflected light from the composite resin irradiated with the light is received, normalization is performed at a peak position maximized in a peak at 2800 cm?1 or more and 3000 cm?1 or less, which is a C—H stretching peak caused by the composite resin, in a reflection or absorption spectrum obtained by the reflected light, and a reflection or absorption spectrum for determination is obtained. The spectrum is used to acquire a ratio value of a spectral intensity (background intensity) at a position of 1000 cm?1 or less according to a determined resin type and different from a wave number at which a peak derived from resin of the determined resin type is expressed, and a ratio of the spectral intensity (background intensity) is used so that a composite of cellulose combined in composite resin can be determined with high accuracy.

Abstract: Composite resin containing cellulose is irradiated with infrared light, reflected light from the composite resin irradiated with the light is received, normalization is performed at a peak position maximized in a peak at 2800 cm?1 or more and 3000 cm?1 or less, which is a C—H stretching peak caused by the composite resin, in a reflection or absorption spectrum obtained by the reflected light, and a reflection or absorption spectrum for determination is obtained. The spectrum is used to acquire a ratio value of a spectral intensity (background intensity) at a position of 1000 cm?1 or less according to a determined resin type and different from a wave number at which a peak derived from resin of the determined resin type is expressed, and a ratio of the spectral intensity (background intensity) is used so that a composite of cellulose combined in composite resin can be determined with high accuracy.