Ultraviolet fluorescent color detection device and ultraviolet fluorescent color detection method

Abstract

Provided are an ultraviolet fluorescent color detection device and an ultraviolet fluorescent color detection method capable of simply and accurately detecting the reading accuracy of a visible fluorescent color of a medium during irradiation with ultraviolet light. Ultraviolet rays are radiated to the medium from an ultraviolet light source (a first light source unit (4)). A white LED light source (a light source included in a second light source unit (3)) emits white light by causing fluorescence of a fluorescent substance. Light that has passed through at least one visible light color filter is incident on a plurality of light receiving elements provided in a light receiving unit. An output signal from each light receiving element obtained when the fluorescent light from the medium irradiated with the ultraviolet light from the ultraviolet light source is incident on the plurality of light receiving elements through the visible light color filter is corrected on the basis of outputsignals from the light receiving elements obtained when the light from a white reference material (200) irradiated with white light from the white LED light source is incident on the plurality of light receiving elements through the visible light color filter.

Description

technical field [0001] The present invention relates to an optical linear sensor device, in particular to an optical linear sensor device for identification for the purpose of identification of securities, banknotes, etc. Therefore, the present invention relates to high-precision detection of securities, An ultraviolet fluorescent color detecting device and an ultraviolet fluorescent color detecting method for emitting fluorescent color of fluorescent substances contained in banknotes and the like. Background technique [0002] With the remarkable performance improvement of the recent printing technology and copying technology, the forgery of banknotes, securities, etc. has become more sophisticated, and in order to maintain the social order of the country, it is important to accurately identify and eliminate these forgery. In particular, in equipment that handles banknotes, such as ATMs and banknote processing machines, there is a strong demand for higher-speed and higher-p...

AI Technical Summary

Problems solved by technology

However, this identification method has the following problems: since the output is detected in a monochromatic tone, compared with the actual identification of fluorescence with the naked eye, the feeling is greatly different, and further, the interference caused by the fluorescence of the dielectric substrate, etc. Inability to obtain the fluorescent object of interest with sufficient contrast

[0010] However, in the above-mentioned method, it is known that there are various problems in order to detect the reading accuracy of the color of the medium fluorescence when irradiated with ultraviolet rays with the same color balance as when recognizing with the naked eye.

[0011] That is, in the existing identification sensor, visible light LED monochromatic lights such as red, green, and blue are sequentially turned on, and the density balance of the output image of each medium is corrected to synthesize an appropriate color output. image, however, in order to set a color filter for each sensor pixel and detect the fluorescent color, there is a problem that the output balance of each color filter cannot be corrected, and the desired irradiated ultraviolet rays cannot be accurately detected shade of fluorescent color

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