JP2019115523A - Light irradiation device - Google Patents

Abstract

To provide a light irradiation device capable of suppressing a deviation in the illuminance distribution of an irradiation light in order to solve the problem with a conventional light irradiation device for irradiating a light onto photocurable resin from a viewpoint of suppressing a deviation in the illuminance distribution of an irradiation light.SOLUTION: A light irradiation device 100 includes a light source part 20, and a light guide part 8. The light source part 20 outputs a light 26. The light guide part 8 guides the light 26 from the light guide part 20 by internally reflecting it, and emits it from an emission port 18h. In the light guide part 8, the inner shape of a cross section perpendicular to a light path is polygonal.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a light irradiation device.

  In the field of dental treatment, a method of curing a photocurable resin using ultraviolet light is known. For example, Patent Document 1 describes a light irradiation device for a dental light-curable composite resin. The dental light irradiation device described in Patent Document 1 includes an LED that outputs light of a plurality of light emission wavelengths, and a changeover switch that switches an LED to be lit.

JP 2003-305058 A

The present inventor has obtained the following recognition about a light irradiation device for irradiating light to a photocurable resin.
When the photocurable resin is irradiated with light to be cured, it is desirable that the photocurable resin be uniformly cured. This is because if overcuring or uncuring occurs, the durability of the resin may decrease. In order to cure the photocurable resin uniformly, it is desirable that the irradiation light be uniformly applied to the photocurable resin.

  It is conceivable to use a light guide in which light transmissive fibers are bundled and integrated to guide light from the light source to the outlet of the light irradiation device. However, according to the study of the present inventor, it has been found that when the light guide in which the optical fibers are bundled is used, the bias of the illuminance distribution of the irradiation light tends to occur at the exit of the light. This is considered to be because, when light is guided by a light guide obtained by bundling optical fibers, the deviation of the illuminance distribution at the light source leads to the deviation of the illuminance distribution of the emitted light. In particular, in the case where a plurality of light emitting elements having different wavelengths are arranged side by side on the substrate surface, when light is guided by a light guide obtained by bundling optical fibers, the deviation of the light characteristics due to the arrangement is highly likely to cause the deviation of emitted light.

From this, the present inventor recognized that the light irradiation apparatus for irradiating light to the photocurable resin has a problem to be improved in terms of suppressing the bias of the illuminance distribution of the irradiation light.
Such a subject may arise also about the light irradiation apparatus which irradiates light to the photocurable resin in the application of another field | area not only for the use of a dental treatment.

  The object of the present invention is made in view of such a subject, and is providing the light irradiation device which can control the bias of the illumination distribution of irradiation light.

  In order to solve the above problems, a light irradiation apparatus according to an aspect of the present invention includes a light source unit that outputs light, and a light guide unit that internally reflects light from the light source unit and guides the light and emits the light from an emission port. And. The light guide has a polygonal inner shape in cross section perpendicular to the light path.

  According to this aspect, by internally reflecting and guiding the light from the light source, it is possible to mix the light at the time of reflection, and to suppress the deviation of the illuminance of the emitted light.

  It is to be noted that any combination of the above-described constituent elements, and one in which the constituent elements and expressions of the present invention are mutually replaced among methods, systems, etc. is also effective as an aspect of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the light irradiation apparatus which can suppress the bias | inclination of the illumination intensity distribution of irradiation light can be provided.

It is a side view of the light irradiation device concerning a 1st embodiment. It is a bottom view of the light irradiation apparatus of FIG. It is sectional drawing of the side view cut | disconnected by the AA of FIG. It is a front view of the light source part of the light irradiation apparatus of FIG. It is sectional drawing of the side view of the light irradiation apparatus which concerns on a 1st modification. It is sectional drawing of the side view of the light irradiation apparatus which concerns on a 2nd modification. It is sectional drawing of the side view of the light irradiation apparatus which concerns on a 3rd modification. It is a front view of the light source part of the light irradiation apparatus of FIG. It is sectional drawing of the side view of the light irradiation apparatus which concerns on a 4th modification. It is sectional drawing of the side view of the light irradiation apparatus which concerns on a 5th modification.

First Embodiment
Hereinafter, with reference to the drawings, a light irradiation apparatus 100 according to a first embodiment of the present invention will be described. FIG. 1 is a side view of the light irradiation device 100 according to the first embodiment. FIG. 2 is a bottom view of the light irradiation device 100. FIG. FIG. 3 is a cross-sectional view of the light irradiation device 100 in a side view. FIG. 3 shows a longitudinal cross section taken along the line A-A of FIG. FIG. 4 is a front view of the light source unit 20 of the light irradiation device 100. FIG.

  The following description is based on the XYZ orthogonal coordinate system. The Y-axis direction corresponds to the left-right direction in FIG. 1 to FIG. 3, and corresponds to the vertical direction in FIG. The X-axis direction corresponds to the direction perpendicular to the paper surface in FIGS. 1 and 3, corresponds to the vertical direction in FIG. 2, and corresponds to the horizontal direction in FIG. 4. The Z-axis direction corresponds to the vertical direction in the drawing of FIG. 1, FIG. 3, and FIG. 4, and corresponds to the vertical direction of the drawing in FIG. The Y-axis direction and the Z-axis direction are orthogonal to the X-axis direction. The notation of such directions does not limit the use posture of the light irradiation device 100, and the light irradiation device 100 can be used in any posture.

(Light irradiation device)
The light irradiation device 100 is a light irradiation device that irradiates the irradiation light 28 for curing the photocurable resin from the emission port 18 h provided in the emission unit 18. As an example, the light irradiation apparatus 100 can be used as a light irradiation apparatus for curing the dental treatment resin in the oral cavity. The light irradiation device 100 mainly includes the light guide unit 8, the light source unit 20, the sensor 46, and the operation unit 60. The light guide 8 mainly includes a main body 10, an emission unit 18, and an optical path changing unit 32. The operation unit 60 mainly includes a control unit 50, a power supply unit 52, an operation unit 54, and a display unit 56.

  The light guide unit 8 internally reflects the light from the light source unit 20 to guide the light, and emits the light from the emission port 18 h of the emission unit 18. The light guide portion 8 includes a main body portion 10 to which light from the light source portion 20 is incident, and an emission portion 18 which is detachably provided on the main body portion 10 and has an emission port 18 h. The light source unit 20 outputs the light 26 toward the main body 10 of the light guide 8. The main body unit 10 guides the light 26 from the light source unit 20 to the emission unit 18. The optical path changing unit 32 changes the optical path direction in the optical path, bends the light 26 b from the main body unit 10 and guides the light 26 b to the emitting unit 18. The emitting unit 18 guides the light 26c from the light path changing unit 32 to the emitting opening 18h, and emits the light 26c from the emitting opening 18h as the irradiation light 28. The control unit 50 controls the light emission of the light source unit 20. The power supply unit 52 supplies power to the light irradiation device 100. The operation unit 54 detects an operation start or stop operation of the light irradiation device 100. The display unit 56 displays the operation state of the light irradiation device 100 and the like.

(Light source section)
As one example, the light source unit 20 may output light 26 of a wavelength having an action of curing the photocurable resin. The light source unit 20 may output light of a single wavelength, but the light irradiation device 100 is configured to output light of a plurality of wavelengths. By mixing the wavelengths or switching and using the wavelengths, an action corresponding to each wavelength can be produced. The light source unit 20 may output, for example, long wavelength ultraviolet light (UVA wave) of 320 nm to 400 nm, medium wavelength ultraviolet light (UVB wave) of 280 nm to 350 nm, or the like.
As a result, the irradiation light 28 output from the emission port 18 h may contain ultraviolet light having a peak in the wavelength range of 320 nm to 400 nm or ultraviolet light having a peak in the wavelength range of 280 nm to 350 nm. it can.

  The light source unit 20 includes a substrate 20 b, a light emitter 22 disposed on the substrate 20 b, and a fitting frame 40. The substrate 20 b is a plate-like member extending in the XZ plane. Various well-known substrates can be adopted as the substrate 20b. The outer shape of the substrate 20b in a front view has a rectangular shape.

  The light emitter 22 includes one or more light emitting elements. In the example of FIG. 3, the light emitter 22 includes a plurality of light emitting elements 22 e arranged in a matrix of N rows and M columns (N and M are integers of 2 or more). N and M may be the same or not. N and M can be set corresponding to the desired illuminance and the desired number of wavelengths. In the example of FIG. 2, the light emitter 22 includes four light emitting elements 22 e arranged in two rows and two columns. Note that it is not essential that the light source unit 20 includes a plurality of light emitting elements 22e, and the light source unit 20 may include only one light emitting element 22e.

  As the light emitter 22, light emitting elements 22 e based on various principles can be adopted. In the light irradiation device 100, an LED (Light Emitting Diode) that emits ultraviolet light is adopted as the light emitter 22. For example, by using an LED having a center wavelength or a peak wavelength of about 305 nm as the light emitter 22, it can be used for irradiation of UVB waves. As such an LED, an aluminum gallium nitride (AlGaN) based LED is known.

  The fitting frame 40 is a frame-like member for detachably attaching the light source unit 20 to the main body unit 10. The fitting frame 40 is a rectangular frame surrounding the light emitting body 22, and the substrate 20b is fixed. The fitting frame 40 protrudes from the substrate 20 b in the Y-axis direction, and has a shape in which the main body portion 10 fits on the outer periphery of the fitting frame 40.

(Body part)
Light from the light source unit 20 is incident on the main body unit 10. The main body unit 10 suppresses the divergence of the light 26 from the light source unit 20 and guides it toward the emission unit 18. The main body portion 10 is a substantially cylindrical member surrounding an optical path for guiding the light 26. The main body 10 extends in the direction of the optical path of the light 26 from the light source 20. In the example of FIG. 3, the optical path direction is determined in the Y-axis direction, and the main body 10 extends in the Y-axis direction. The inner cross section perpendicular to the light path of the main body 10 may be polygonal, and in this example is square. Therefore, the main body portion 10 includes the first reflection plate 12, the second reflection plate 14, and the pair of side reflection plates 16.

  The first reflector 12, the second reflector 14, and the pair of side reflectors 16 are combined to surround a cylindrical space. In the example of FIG. 3, the first reflection plate 12 constitutes the upper wall of the main body 10, the second reflection plate 14 constitutes the lower wall of the main body 10, and the side reflection plates 16 are side walls of the main body 10. Are configured. The main body portion 10 acts so as to internally reflect the light 26 by each of the reflection plates so as to reduce the deviation of the illuminance distribution. The inner surface of each of the first reflector 12, the second reflector 14, and the pair of side reflectors 16 may be formed of a material with high reflectance such as aluminum. Aluminum is preferred in that it has high reflectance in the ultraviolet light region.

  The first reflecting plate 12 and the second reflecting plate 14 are arranged such that their reflecting surfaces face each other in the Z-axis direction. The spacing in the Z-axis direction between the first reflector 12 and the second reflector 14 may be constant. In the example of FIG. 1 and FIG. 3, the first reflector 12 and the second reflector 14 move away from the light source unit 20 in a portion in which the distance in the Z-axis direction is constant from the light source unit 20 side in the Y-axis direction. A portion in which the distance in the Z-axis direction is smaller and a portion in which the distance in the Z-axis direction is constant are arranged in this order.

  The pair of side reflectors 16 are arranged in the X axis direction such that the respective reflecting surfaces face each other. The pair of side reflectors 16 is a reflector that is bridged between the side of the first reflector 12 and the side of the second reflector 14. The distance between the pair of side reflectors 16 in the X-axis direction may be constant. In the example of FIG. 2, the pair of side reflectors 16 has a portion in which the distance in the X-axis direction is constant from the light source portion 20 side in the Y-axis direction, and a portion in which the distance in the X-axis direction decreases with distance from the light source portion 20 And a portion where the distance in the X-axis direction is constant, in this order.

(Cross section change part)
The light source unit 20 preferably includes a plurality of light emitting elements 22e having different wavelength characteristics in order to switch the wavelength characteristics or to mix them in a desired combination. For this reason, it is conceivable to increase the cross-sectional area on the incident side of the light guide 8. The exit is preferably small to illuminate a limited area in the oral cavity. For example, when the light irradiation apparatus 100 is used to polymerize and harden a dental photopolymerizable composite resin filled in the teeth of the patient's oral cavity, the exit may be set to about 5 mm to 15 mm square. Therefore, the light guide unit 8 in FIG. 1 has a cross-section changing unit 44 in which the cross-sectional area of the light path gradually decreases as the light source unit 20 is moved away. The cross-sectional area of the light path is the area of the inner cross-section perpendicular to the light path. The cross-section changing unit 44 may be provided, for example, in the main body unit 10 of the light guide unit 8. The cross-section changing part 44 has a portion in which the distance in the Z-axis direction decreases as the first reflector 12 and the second reflector 14 move away from the light source 20, and the X-axis as the distance from the light source 20 of the pair of side reflectors 16 increases. It corresponds to the part where the distance between the directions becomes smaller.

(Light path change unit)
The light path changing unit 32 is provided between the light path of the main body unit 10 and the light path of the emitting unit 18. The optical path changing unit 32 includes a reflecting member 34 for changing the optical path direction. In the example of FIG. 3, the reflection member 34 reflects the light 26 b incident from the main body 10 in the Y-axis direction, and emits the light 26 c traveling in the Z-axis direction to the emission unit 18. The light irradiation apparatus 100 includes the light path changing unit 32 so that the light path of the entire apparatus is configured in an L shape. The reflecting member 34 functions as a reflecting plate that reflects the light 26 b incident from the main body 10 and emits the light 26 b toward the exit 18 h. The reflecting member 34 may be, for example, a flat plate-like member. The reflective surface of the reflective member 34 may be formed of a highly reflective material such as aluminum. The reflecting member 34 may be disposed inside the main body portion 10 or the emitting portion 18. In the example of FIG. 3, in the upper space of the emission part 18, it is parallel to the X-axis direction and inclined 45 degrees with respect to the Y-axis direction and the Z-axis direction.

(Emission part)
The emitting unit 18 is detachably provided to the main body unit 10 and has an emitting opening 18 h. The emitting unit 18 suppresses the divergence of the light 26 c from the light path changing unit 32 and guides the light 26 c to the emitting opening 18 h. The emitting unit 18 is a substantially cylindrical member surrounding an optical path for guiding the light 26c. The emitting portion 18 extends in the direction of the light path of the light 26c. In the example of FIG. 3, the emission part 18 is extended in the Z-axis direction. The inner cross section perpendicular to the light path of the emitting portion 18 may be a polygon, and in this example is a square. The emitting unit 18 may be configured of four reflecting plates. The emitting unit 18 acts so as to internally reflect the light 26c with each of the reflectors to reduce the deviation of the illuminance distribution. It is desirable that the inner surface of each reflector has a high reflectance, and in the example of FIG. 3, it is formed of an aluminum material.

(Emission)
The exit 18 h is an opening provided at the tip of the exit portion 18 in the Z-axis direction. In the example of FIG. 2, the exit 18 h has a substantially rectangular shape in a bottom view. A light transmissive material may be provided in the exit 18 h, but no light transmissive material is provided in the example of FIG. 2. When the emission port 18 h hits an irradiated body such as a tooth, the irradiated body may be damaged. Therefore, in this example, a buffer member 18s is provided around the exit 18h. The buffer member 18s is provided so as to cover the lower end surface of the emission port 18h and the vicinity thereof. The buffer member 18 s may be formed of a material such as a resin that is softer than the material forming the light emitting portion 18. The buffer member 18s can be formed by applying a resin around the exit 18h. The buffer member 18s may be formed by resin molding and attached to the exit 18h.

  If the emitting part 18 is too large for the object to be irradiated, the irradiation light is wastefully irradiated around the object to be irradiated, which is inefficient. If the emitting portion 18 is too small with respect to the irradiated body, an irradiation insufficient portion occurs in the irradiated body. For this reason, it is desirable to use properly the emission part 18 of a different magnitude | size according to the magnitude | size of a to-be-irradiated body. Therefore, in this example, the emitting unit 18 is detachably attached to the main body unit 10. In the example of FIG. 3, the emission unit 18 is provided with a mounting and demounting mechanism 42. The attachment / detachment mechanism 42 is a rectangular cylindrical portion provided at the incident end of the emission unit 18. The attachment / detachment mechanism 42 has a shape that surrounds the outer periphery of the end portion on the light emission side of the main body portion 10. The shape of the attachment / detachment mechanism 42 does not fall easily in the normal use in a state where the attachment / detachment mechanism 42 is attached to the main body portion 10, and can be smoothly and removably determined when a force is applied in the removal direction.

(Sensor)
If the illumination light is always emitted, it is wasted and may have some effect on the surroundings. For this reason. The light source unit 20 may be controlled to emit light when the emitting unit 18 approaches the irradiated object. The light irradiation apparatus 100 is provided with a sensor 46 for detecting the distance to the object to be irradiated. The sensor 46 may employ various known sensors such as limit switches.

  The control unit 50 controls the light emission of the light emitting body 22 based on the input from the operation unit 54 and the detection result of the sensor 46. The control unit 50 causes the display unit 56 to display information for setting irradiation conditions such as the light emission intensity of the light emitter 22 and the lighting time. Control unit 50 receives the setting of these conditions through the input from operation unit 54. The control unit 50 may hold, for example, irradiation conditions corresponding to a plurality of irradiation modes and each irradiation mode. The control unit 50 causes the display unit 56 to display a list of a plurality of irradiation modes, and receives the designation of the irradiation mode by the input from the operation unit 54, thereby outputting the irradiation light of the irradiation conditions corresponding to the designated irradiation mode. The light emitters 22 may be controlled to be controlled. The control unit 50 can be realized using a known CPU (Central Processing Unit) or the like.

  The power supply unit 52 supplies power to the light source unit 20, the control unit 50, and the like. Power supply unit 52 includes a storage battery (not shown) such as a lithium ion battery. The power supply unit 52 has a power supply terminal for charging the storage battery, and is configured to be able to be charged through an AC adapter or the like connected to the power supply terminal. The power supply unit 52 may include a dry battery, which is a primary battery or a secondary battery. In this case, the light irradiation device 100 may be provided with a holder for holding a storage battery or a dry battery.

  The operation unit 54 is used for operations of start and end of irradiation by the light irradiation apparatus 100 and operations for setting irradiation conditions of the light irradiation apparatus 100. The display unit 56 is configured of, for example, a liquid crystal display, and displays the operation state of the light irradiation device 100, the irradiation condition set, and the like. The operation unit 54 may be configured by a switch, a button, or the like provided at a position different from the display unit 56, or may be configured by a touch panel integrated with the display unit 56.

  In the light irradiation device 100, the main body portion 10 and the light source portion 20 constitute a main body portion 58. The operation unit 60 may be configured integrally with the main body 58, but is configured separately in the example of FIG. 1 and connected to each other by a wire. In this case, the main body portion 58 becomes lightweight, and the irradiation operation becomes easy. The members or elements described as being included in the operation unit 60 may be included in the main body 58.

  Next, the usage method of the light irradiation apparatus 100 is demonstrated. First, the irradiation mode is determined according to the irradiation conditions. Next, the light irradiation apparatus 100 is arrange | positioned so that the radiation | emission opening 18h may cover the location where the curable resin of irradiation object was apply | coated. After arranging the light irradiation device 100, irradiation of irradiation light is started. The irradiation is automatically stopped after a preset time has elapsed since the irradiation was started. These tasks may be performed in the oral cavity.

  Next, the operation and effects of the light irradiation device 100 configured as described above will be described.

  The light irradiation apparatus 100 according to the first embodiment includes a light source unit 20 that outputs light, and a light guide unit 8 that internally reflects light from the light source unit 20 and guides the light and emits the light from an emission port 18 h. The light guide 8 has a polygonal inner shape in cross section perpendicular to the light path. According to this configuration, the light from the light source unit 20 is internally reflected and guided as compared with the case of using the bundled optical fibers, so that the lights are mixed, and the deviation of the illuminance distribution of the irradiated light is reduced. Since the cross section of the inner shape is a polygon, the deviation of the illuminance distribution is smaller than in the case of the circular shape.

  In the light irradiation apparatus 100 according to the first embodiment, the light guiding unit 8 includes the light path changing unit 32 that changes the light path direction in the light path. According to this configuration, as compared with the case where the light path changing unit is not provided, it becomes easier to direct the emission port to the resin applied around the teeth in the state where the light guide 8 is inserted in the oral cavity. By directing the light emission port to the resin, it is possible to reduce the deviation of the amount of light irradiated to the resin.

  In the light irradiation apparatus 100 according to the first embodiment, the light path changing unit 32 includes a reflecting member 34 for changing the light path direction. According to this configuration, it is easy to reduce the size and weight of the optical path changing unit 32 as compared to the case where the reflecting member 34 is not used.

  In the light irradiation apparatus 100 according to the first embodiment, the light guide unit 8 includes a cross-section changing unit 44 in which the cross-sectional area of the light path gradually decreases as the light source unit 20 is further away. According to this configuration, the cross-sectional area on the incident side of the light guide 8 can be made larger than that on the output side, so that the plurality of light emitting elements 22 e can be disposed in the light source unit 20. For example, a plurality of light emitting elements with different wavelength characteristics can be arranged, and the wavelength characteristics can be switched or mixed in a desired combination.

  In the light irradiation apparatus 100 according to the first embodiment, the light guiding unit 8 is detachably provided on the main body unit 10 on which the light from the light source unit 20 is incident and the main body unit 10, and the emitting unit 18 having the emitting opening 18h. And contains. According to this configuration, it is possible to properly use the emitting portion 18 of different size according to the size of the irradiated body.

  The above has been described based on each embodiment of the present invention. These embodiments are illustrative, and it is understood by those skilled in the art that various modifications and changes are possible within the scope of the claims of the present invention, and such variations and modifications are also within the scope of the claims of the present invention. It is about to be Accordingly, the descriptions and drawings herein are to be considered as illustrative and not restrictive.

  Hereinafter, modified examples will be described. In the drawings and description of the modified examples, the same components or members as those of the embodiment are denoted by the same reference numerals. The description overlapping with the embodiment is appropriately omitted, and the configuration different from the first embodiment is mainly described.

(First modification)
In the description of the first embodiment, an example in which the main body portion 10 has the cross-sectional change portion 44 has been described, but the present invention is not limited to this. It is not essential that the main body portion 10 have the cross-sectional change portion 44. FIG. 5 is a cross-sectional view of the light irradiation device 200 according to the first modification as viewed from the side. FIG. 5 corresponds to FIG. In the drawings showing the modified example including FIG. 5, the description of the sensor 46, the buffer member 18s, etc. is omitted. The light irradiation device 200 is different from the light irradiation device 100 according to the first embodiment in that the main body portion 10 (B) does not have a cross section changing portion, and the light source portion 20 (B) includes only one light emitting element 22 e. The other configurations are similar. The light irradiation apparatus 200 according to the first modification functions in the same manner as the light irradiation apparatus 100 according to the first embodiment.

(2nd modification)
In the description of the first embodiment, the example in which the light path changing unit 32 includes the reflecting member 34 as a separate member has been described, but the present invention is not limited thereto. The reflecting member may be integrally formed with the main body or the emitting part. FIG. 6 is a cross-sectional view of the light irradiation apparatus 300 according to the second modification as viewed from the side. FIG. 6 corresponds to FIG. The light irradiation device 300 according to the second modification has the main portion 10 (C) and the light emission portion 18 (C) formed integrally with the light irradiation device 200 according to the first modification. The difference is that (C) is provided integrally with the main body 10 (C), and the other configuration is the same. The light irradiation device 300 according to the second modification functions in the same manner as the light irradiation device 100 according to the first embodiment.

(Third modification)
In the description of the first embodiment, the example in which the light source unit 20 includes the four light emitting elements 22e has been described, but the present invention is not limited to this. The light source unit may include three or less or five or more light emitting elements 22e. FIG. 7 is a cross-sectional view of the light irradiation device 400 according to the third modification as viewed from the side. FIG. 8 is a front view of the light source unit 20 (D) of the light irradiation device 400. 7 corresponds to FIG. 3 and FIG. 8 corresponds to FIG.

  The light irradiation apparatus 400 according to the third modification is different from the light irradiation apparatus 300 according to the second modification in that a cross-section changing part 44 (D) is provided in the main body part 10 (D), and a light source part 20 (D) Is different in that it includes nine light emitting elements 22e, and the other configuration is the same. In this case, the illuminance of the irradiation light can be increased to shorten the curing time of the resin. The nine light emitting elements 22e are arranged in three rows and three columns. In the light irradiation device 400, the half on the light source unit 20 (D) side of the main body unit 10 (D) is the cross-section changing unit 44 (D), and the other half of the main unit 10 (D) has a constant optical path cross-sectional area And a constant cross section 45 (D). The light irradiation apparatus 400 which concerns on a 3rd modification functions similarly to the light irradiation apparatus 100 which concerns on 1st Embodiment.

(4th modification)
FIG. 9 is a cross-sectional view of the light irradiation device 500 according to the fourth modification as viewed from the side. FIG. 9 corresponds to FIG. The light irradiation device 500 according to the fourth modification is different from the light irradiation device 400 according to the third modification in that the cross-sectional shape of the main body portion 10 (E) is different, and the other configuration is the same. In the light irradiation device 400, substantially the entire main body portion 10 (E) is a cross-sectional change portion 44 (E). The light irradiation apparatus 500 which concerns on a 4th modification functions similarly to the light irradiation apparatus 100 which concerns on 1st Embodiment.

(5th modification)
FIG. 10 is a cross-sectional view of the light irradiation device 600 according to the fifth modification as viewed from the side. FIG. 10 corresponds to FIG. The light irradiation device 600 according to the fifth modification is different from the light irradiation device 500 according to the fourth modification in that the cross-sectional shape of the main body 10 (F) is different, and the other configuration is the same. The second reflection plate 14 (E) of the light irradiation device 500 according to the fourth modification is inclined with respect to the Y-axis direction, whereas the second reflection of the light irradiation device 600 according to the fifth modification is The plate 14 (F) is parallel to the Y-axis direction. The light irradiation apparatus 600 which concerns on a 5th modification functions similarly to the light irradiation apparatus 100 which concerns on 1st Embodiment.

(Sixth modification)
In the description of the first embodiment, the example in which the plurality of light emitting elements 22e are arranged in a matrix is described, but the present invention is not limited to this. The plurality of light emitting elements 22e may be arranged in an arbitrary pattern such as concentric circles.

(Seventh modified example)
In the description of the first embodiment, an example in which the exit 18 h is formed in a rectangular shape has been described, but it is not limited thereto. The exit 18 h may include an opening of an arbitrary shape such as a polygonal shape or an elliptical shape other than a rectangular shape.

Eighth Modified Example
In the description of the first embodiment, the example in which the light source unit 20 is configured integrally with the main body unit 10 has been described, but the present invention is not limited thereto. The light source unit and the light guide unit may be connected via an optical transmission medium such as an optical fiber.

(Ninth modification)
In the description of the first embodiment, an example is described in which the light path of the light irradiation device 100 is configured without using a light transmitting optical element such as a lens, but it is not limited thereto. The light irradiation device may be configured to include an optical element having translucency.

  Each of the above-described modifications has the same operation and effect as the first embodiment.

  Any combination of the above-described embodiments and the modifications is also useful as an embodiment of the present invention. The new embodiments resulting from the combination combine the effects of the respective embodiments and variations to be combined.

  8 ··· Light guiding unit 10 ··· Main body unit 18 ··· Emission unit 18 ··· Emission unit 20 ·· Light source unit 22 e ·· Light emitting element 28 ··· Irradiation light 32 ··· Optical path changing unit 34 · · Reflecting member, 42 · · · Detaching mechanism, 44 · · · Cross section change portion, 100 · · · Light irradiation device.

Claims (6)

A light source unit that outputs light;
A light guiding unit that internally reflects light from the light source unit and guides the light, and emits the light from an emission port;
Equipped with
The light irradiation device according to claim 1, wherein the light guide unit has a polygonal inner shape in a cross section perpendicular to the light path.   The light irradiation apparatus according to claim 1, wherein the light guiding unit includes an optical path changing unit that changes an optical path direction in the optical path.   The light irradiation apparatus according to claim 2, wherein the light path changing unit includes a reflecting member for changing the light path direction.   The light irradiation apparatus according to any one of claims 1 to 3, wherein the light guide portion has a cross-sectional change portion in which a cross-sectional area of the light path gradually decreases as the distance from the light source portion increases.   The said light guide part contains the main-body part which the light from the said light source part injects, and the radiation | emission part provided in the said main-body part so that attachment or detachment is possible, and having the said radiation | emission opening is characterized by the above-mentioned. The light irradiation device according to any one of the above.   The said light source part outputs the ultraviolet-ray which has a peak in a wavelength range of 320 nm-400 nm or 280 nm-350 nm, The light irradiation apparatus in any one of Claim 1 to 5 characterized by the above-mentioned.

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