JPS6222835Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for extracting a fluorescent substance, and particularly to a device that can easily extract a fluorescent substance that emits fluorescence when stimulated by light other than visible light.

BACKGROUND ART Currently, in order to prevent counterfeiting and counterfeiting, there are many printed matter printed with fluorescent ink containing fine powder of a fluorescent substance, and paper made by mixing a fluorescent substance. The fluorescent substances present in these printed materials and papers do not emit fluorescence when irradiated (stimulated) with visible light that the human eye can perceive, but when stimulated by non-visible light, such as ultraviolet rays, X-rays, or alpha rays. ,β
Those that emit fluorescence only when irradiated with radiation such as radiation are used. Therefore, fluorescence emitted from information such as signs and signals in paper or image-forming bodies (printed materials, cards, etc.) obtained using this fluorescent substance or printing ink or paint containing this fluorescent substance. cannot be confirmed under visible light irradiation, and can only be confirmed by irradiation with ultraviolet rays, electron beams, etc.

BACKGROUND ART Black light lamps (ultraviolet irradiation devices) have been commercially available for easily revealing fluorescent substances. Using this black light lamp, irradiate ultraviolet rays onto the information, paper, etc. in the image forming body mentioned above, confirm the emitted fluorescence, and determine whether fluorescent substances are present in the information, paper, etc. in the image forming body. When trying to inspect and confirm that the emitted fluorescent light is outside light (visible light)
This made it extremely difficult to see (the wavelength of the fluorescent light is in the visible range), and it became necessary to inspect and confirm it in a location that was not exposed to external light (visible light).

Furthermore, with the small Bratu Light lamps available on the market, the UV rays emitted easily enter the eyes directly.
It was also unsuitable for long-term use.

The present invention was developed in view of the above-mentioned circumstances, and includes an observation window in the upper part and an aperture window in the desired part of the lower surface that can be viewed through the observation window. Inside the box, there is a light-shielding hood installed over a path connecting the observation window and the bay window, an ultraviolet irradiation device installed so that ultraviolet rays are irradiated only to the window, and The irradiation device is equipped with a blind provided to prevent ultraviolet rays emitted from the light emitting section of the irradiation device from directly entering the observation window.

The present invention will be described in detail below with reference to the drawings. In the figure, 7 is an observation window drilled on the top surface of the box, 8
is a hollowed-out window bored in a portion of the lower surface of the box opposite the observation window 7, and the entire surface of the observation window 7 is covered with an ultraviolet cut filter 4 and a magnifying lens 9.
The aperture window 8 is a window for positioning the object to be examined 6 when confirming the presence of a fluorescent substance in the object to be examined 6 using the aperture device of the present invention, and the observation window 7 is a window for positioning the object to be examined 6. This is a window for an observer to observe the object to be examined 6 located in the bay window 8. Therefore, the drilling position of the observation window 7 is
It is not limited to the top surface of the box as shown in the drawings, but may be the top of the box. In short, the observation window 7 may be provided at the top of the box body, and the bay window 8 may be provided at the bottom surface of the box body at a position where the bay window 8 can be viewed through the observation window 7.

Inside the box, a light-shielding hood 10 is provided over a path connecting the observation window 7 and an aperture window 8 provided opposite to the observation window 7. This light-shielding hood 10 is provided to prevent outside light from entering into the extraction window 8 of the extraction device 11 of the present invention, the observation window 7, and the path connecting the two, and may also serve as the outer wall of the box. .

Reference numeral 1 designates a black light lamp constituting an ultraviolet irradiation device, the surface of which is covered with a filter that transmits only ultraviolet rays. Reference numeral 2 denotes a reflecting plate, which is used to effectively irradiate the ultraviolet rays emitted from the black light lamp 1 onto the object 6 placed in the bay window 8. A blind 3 is provided between the bright light lamp 1 and the observation window 7 to prevent ultraviolet rays emitted from the bright light lamp 1 from directly entering the observer's eyes through the viewing window 7.

When the observation device 11 of the present invention having such a structure is placed on the object to be examined 6 as shown in FIG. The observer can now observe only the fluorescent light emitted from the part of the object 6 to be examined and the ultraviolet rays reflected from the surface of the object 6 to be examined. In this embodiment, the observation window 7 is covered with an ultraviolet cut filter 4, so that the observer can only see the fluorescent light emitted from the fluorescent substance present in the object 6 to be examined. Furthermore, if the blinds 3 and the light-shielding hood 10 are painted black, or if a magnifying lens 9 is provided on the observation window 8, a hood that prevents outside light from entering the observation window 7 can be placed on the top of the box. If the light is provided in the area, the light emitted by the fluorescent substance will be more easily recognized.
Alternatively, a mirror may be installed on the inner surface of the light-shielding hood 10 to guide ultraviolet rays reflected by the object to be examined 6 and fluorescence emitted from the fluorescent substance to the observation window 7. In this case, since the ultraviolet rays are absorbed by the mirror, the observation window 7
There is no need to provide an ultraviolet cut filter 4. In FIGS. 1 and 2, 5 is a power source for causing the black light lamp 1 to emit light, and together with the black light lamp 1 constitutes an ultraviolet irradiation device, and 12 is a lighting switch.

As described above, the present invention is safe because ultraviolet rays do not enter the observer's eyes even when used for a long time, and it is not affected by external light, and only the fluorescent light emitted from the fluorescent material of the object to be examined is used. can be observed, it becomes possible to use a black light lamp with low output, and the entire device can also be made smaller.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration and usage state of the scooping device of the present invention, and FIG. 2 is a partially sectional perspective view of the present invention. 1...Bratschreit lamp, 2...Reflector,
3... Blind, 4... Ultraviolet cut filter, 6... Object to be inspected, 7... Observation window, 8... Oak bay window, 10... Shading hood, 11... Examining device.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An observation window is provided inside the box body, which has an observation window in the upper part and an aperture window in the lower part that can be seen through the observation window. A light-shielding hood provided over the path connecting the above-mentioned bay window, an ultraviolet irradiation device provided so that ultraviolet rays are irradiated only to the above-mentioned bay window, and ultraviolet rays emitted from the light emitting part of the ultraviolet irradiation device. An extraction device comprising a blind provided to prevent the light from directly entering the observation window. (2) The extracting device according to claim 1, wherein the observation window is provided with an ultraviolet cut filter. (3) The extraction device according to claim 1, wherein the observation window is provided with an ultraviolet cut filter and a magnifying lens. (4) The extraction device according to claim 1 of the utility model registration claim, characterized in that the observation window portion is provided with a magnifying lens.