JPH08136340A - Ultraviolet photometer - Google Patents

Abstract

PURPOSE: To isolate an ultraviolet-light-receiving part thermally from an ultraviolet lamp, to protect thereby the light-receiving part from a high heat and to make possible easy and inexpensive measurement of the intensity of an ultraviolet ray of the lamp of high output at all times, by a construction wherein a fore end opening part of a route leading the ultraviolet ray is disposed in the vicinity of the ultraviolet lamp and the ultraviolet ray is reflected by a reflector and led to the light-receiving part. CONSTITUTION: An ultraviolet ray taken in from a fore end opening part of an ultraviolet ray intake route part 2 is led to an ultraviolet-light-receiving part 1 through the intermediary of a reflector (cold mirror) 3 which reflects the ultraviolet ray and passes a visible ray of light. A case body 4 holds the light-receiving part 1 and the route part 2, and since it is made of a material of high heat resistance, it makes a heat of conduction from the route part 2 to the light-receiving part 1 very small. According to this constitution, the light-receiving part 1 is protected from a high heat, and even when an ultraviolet lamp of high output is used, in particular, the intensity of the ultraviolet ray can be measured at all times.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to measurement of ultraviolet intensity of an ultraviolet lamp and management of deterioration of the ultraviolet lamp.

[0002]

2. Description of the Related Art In an ultraviolet irradiator that cures a printing ink by irradiating an object to be irradiated with ultraviolet light generated from an ultraviolet lamp, in order to quantitatively control deterioration of the ultraviolet lamp, the ultraviolet intensity is The UV intensity of the UV lamp is measured with a meter.

However, the ultraviolet light receiving element of the ultraviolet intensity meter is thermally vulnerable, and particularly when measuring the ultraviolet light intensity of a high-power ultraviolet lamp, the heat of the lamp deteriorates the ultraviolet light receiving element, so that it is always It is difficult to measure.

[0004]

In the above-described conventional structure of the ultraviolet intensity meter, since the ultraviolet light receiving portion of the ultraviolet intensity meter is thermally fragile, it is necessary to keep the ultraviolet light receiving portion at an appropriate temperature in order to constantly measure the ultraviolet intensity meter. Since it is necessary to cool the structure, it is necessary to change the structure of the ultraviolet irradiation device and to add a new air-cooling type or water-cooling type cooling device, resulting in an increase in the size of the ultraviolet irradiation device and the ultraviolet intensity meter. The increase in size of the ultraviolet irradiation device and the ultraviolet intensity meter causes problems such as difficulty in mounting and increase in manufacturing cost.

Further, in the case of an ultraviolet irradiating device which has not been considered to cool the ultraviolet light receiving part to an appropriate temperature and has already been incorporated in the production facility, the structure of the ultraviolet irradiating device is modified or a new cooling device is added. Is extremely difficult to do.

For the above reasons, when measuring the ultraviolet intensity of a particularly high-output ultraviolet lamp, it is necessary to interrupt the work and temporarily install an ultraviolet intensity meter, which lowers the work efficiency.

Further, when controlling the deterioration state of the ultraviolet lamp, generally, the judgment is made based on the usage time of the ultraviolet lamp rather than temporarily installing the ultraviolet intensity meter, and the ultraviolet ray is detected after a predetermined time elapses. A method of replacing the lamp is used. However, this method does not allow quantitative management of the deterioration status.

Therefore, even when a high-output ultraviolet lamp is used, it is a problem to make it possible to quantitatively control the deterioration state of the lamp by constantly measuring the ultraviolet intensity.

[0009]

In order to solve the above problems, the present invention comprises an ultraviolet ray receiving portion and a path communicating with the ultraviolet ray receiving portion for guiding the ultraviolet ray from an ultraviolet ray lamp. And a case having a heat insulating structure for holding the ultraviolet ray path.

By thus isolating the thermally vulnerable ultraviolet ray receiving portion from the heat of the ultraviolet ray lamp, it is not necessary to provide a cooling device dedicated to the ultraviolet ray receiving portion, and it is possible to constantly measure the ultraviolet ray intensity of the ultraviolet ray lamp having a particularly high output. It can be done easily and cheaply,
It has become possible to quantitatively manage the deterioration situation.

[0011]

In the ultraviolet intensity meter of the present invention, the tip opening of the path for inducing ultraviolet rays is installed in the vicinity of the ultraviolet lamp so as to face the ultraviolet lamp, and generally referred to as a cold mirror, which reflects ultraviolet rays and transmits visible light. Through the reflector, while guiding the ultraviolet light required for measurement to the ultraviolet light receiving part,
The radiant heat from the ultraviolet lamp to the ultraviolet light receiving part is made small, and the conduction heat from the ultraviolet lamp to the ultraviolet light receiving part is made small by the case with a heat insulating structure or the inserted heat insulating material. By disposing the ultraviolet light receiving portion in an atmosphere of low temperature, the thermally weak ultraviolet light receiving portion is protected from the heat of the ultraviolet lamp.

By changing the reflection wavelength of the reflector or inserting an interference filter in front of the light receiving element of the ultraviolet light receiving portion, the wavelength of the ultraviolet light reaching the ultraviolet light receiving portion can be selected. As a result, it is possible to change the wavelength region in which the ultraviolet light receiving section has sensitivity.

The path for introducing the ultraviolet rays has a circular cross section, and its inner diameter is 5 to 1 when a stainless steel pipe is used.
It is 5 mm, and the length of the path is not less than the distance from the vicinity of the lamp to the position of the atmosphere of relatively low temperature. The length of this ultraviolet path can maintain the spatial distance between the ultraviolet lamp and the ultraviolet light receiving portion, and the ultraviolet light receiving portion can be arranged in a relatively low temperature atmosphere. Furthermore, if an optical fiber is used in a part of the ultraviolet ray path, the ultraviolet ray path can be bent. In this case, the ultraviolet ray receiving portion can be arranged at a lower temperature in an atmosphere suitable for the ultraviolet ray receiving portion. However, since the tip opening of the ultraviolet path is placed near the ultraviolet lamp, a thermally tough material is used.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the present invention will be described with reference to the drawings.

1, 2, and 3 are sectional views of an ultraviolet intensity meter showing an embodiment of the present invention.

In FIG. 1, reference numeral 1 is an ultraviolet ray receiving portion,
When ultraviolet rays are received, a signal corresponding to the intensity of the ultraviolet rays is sent to the display unit via the connection line 5. Reference numeral 2 denotes an ultraviolet light guide path, and in this case, a tube having a predetermined length is used. The ultraviolet rays collected from the opening of the tip of this tube are reflected by the ultraviolet ray and pass through the visible ray.
Be led to. The housing 4 holds the ultraviolet light receiving portion 1 and the ultraviolet light guiding path 2 and uses a material having a high heat insulating property, so that the conduction heat from the ultraviolet light path 2 to the ultraviolet light receiving portion 1 is reduced.

In FIG. 2, instead of using a heat insulating material for the housing 4 in FIG. 1, an empty space separating portion 6 is provided and the housing is divided into a portion communicating with the ultraviolet ray receiving portion and a portion communicating with the ultraviolet ray passage portion. This is an example in which the ultraviolet light receiving portion is thermally isolated by.

FIG. 3 shows an example in which a heat insulating material 7 is inserted in the gap 6 of FIG. As a result, the housing is divided into an ultraviolet light receiving side housing communicating with the ultraviolet light receiving portion and an ultraviolet light path side housing communicating with the ultraviolet light path portion, and heat conduction to the ultraviolet light receiving portion is achieved by a heat insulating material arranged therebetween. The heat will be negligible.

FIG. 4 is a sectional view showing an example of the installation of the present invention on an ultraviolet irradiation device. Ultraviolet intensity meter 8 of the present invention
Is installed so that the opening tip of the ultraviolet light guide path 2 faces the ultraviolet lamp 7 inside the ultraviolet irradiation device, and the ultraviolet light receiving part 1 is arranged outside the irradiation device 8 to thereby receive the light receiving part 1.
While inducing the ultraviolet rays from the ultraviolet lamp 7, the heat generated from the ultraviolet lamp 7 can be blocked.

FIG. 5 is a partial sectional view showing an example of the structure of the ultraviolet light receiving portion. An ultraviolet light receiving element 9 is arranged on the surface of the ultraviolet light receiving section 1 that receives the ultraviolet light guided from the ultraviolet light guide path 2. The interference filter 10 is inserted in the front surface of the ultraviolet light receiving element 9. By exchanging the interference filter 10, the intensity of the ultraviolet light guided to the ultraviolet light receiving element 9 is adjusted according to the intensity emitted by the ultraviolet lamp 7 to prevent the scale-over. In addition, the sensitivity characteristic can be changed to an arbitrary wavelength by changing the ultraviolet ray passing region of the interference filter 10.

[0021]

According to the present invention, a thermally vulnerable ultraviolet ray receiving portion is provided by thermally isolating the ultraviolet ray lamp from the ultraviolet ray receiving portion and providing a path for inducing ultraviolet rays.
It is possible to protect the ultraviolet lamp from high heat, and it is possible to always measure the ultraviolet intensity of the ultraviolet lamp even when a high-output ultraviolet lamp is used.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 shows an example of installation of an ultraviolet intensity meter according to the present invention in an ultraviolet lighting fixture.

FIG. 5 is a partial cross-sectional view showing an example of an ultraviolet ray receiving section in the present invention.

[Explanation of symbols]

 1 UV light receiving part 2 UV light collecting path part 3 Reflector 4 Housing 5 Connection line 6 Gap interval 7 Heat insulation material

Claims (6)

[Claims] 1. An ultraviolet light receiving portion for receiving an ultraviolet light to measure the intensity, a housing communicating with the ultraviolet light receiving portion, and an ultraviolet light path for guiding the ultraviolet light to the housing by collecting the ultraviolet light from an ultraviolet lamp. An ultraviolet intensity meter, comprising: a portion, wherein a material having a high heat insulating property is used for the housing. 2. An ultraviolet light receiving portion for receiving the ultraviolet light and measuring the intensity, a housing communicating with the ultraviolet light receiving portion, and an ultraviolet light path for guiding the ultraviolet light to the housing by collecting the ultraviolet light from an ultraviolet lamp. An ultraviolet intensity meter, comprising: a portion, wherein the casing is divided into a portion that communicates with the ultraviolet light receiving portion and a portion that communicates with the ultraviolet light passage portion by having an empty space breaking portion. 3. An ultraviolet light receiving portion for receiving ultraviolet light and measuring intensity, a housing communicating with the ultraviolet light receiving portion, and an ultraviolet light path for collecting ultraviolet light from an ultraviolet lamp and guiding the ultraviolet light to the housing. A housing, the housing is divided into an ultraviolet light receiving portion side housing communicating with the ultraviolet light receiving portion and an ultraviolet light path portion side housing communicating with the ultraviolet light path portion, and the ultraviolet light receiving portion side housing. An ultraviolet intensity meter, wherein a heat insulating material is arranged between the ultraviolet ray path side casing and the casing. 4. A reflector for reflecting only a specific wavelength of light is provided between the light collecting opening of the ultraviolet light guiding path and the ultraviolet light receiving portion. Three
The ultraviolet intensity meter described. 5. An interference filter for transmitting only light of a specific wavelength is provided between a light collection opening of the ultraviolet light guiding path and the ultraviolet light receiving portion. 3. The ultraviolet intensity meter described in 3. 6. Claim 1, claim 2, claim 3, claim 4
Alternatively, the ultraviolet intensity meter according to claim 5 is provided, and the opening tip of the ultraviolet light guide path of the ultraviolet intensity meter is installed inside the irradiation device so as to face the ultraviolet lamp, and the ultraviolet light receiving portion of the ultraviolet intensity meter is the irradiation device. An ultraviolet irradiation device characterized in that the ultraviolet irradiation device is arranged outside.