Ultraviolet irradiation device

Abstract

To provide an ultraviolet irradiation device in which an optical axis can be easily adjusted.SOLUTION: An irradiation device (ultraviolet irradiation device) 1 comprises, as one unit: an ultraviolet light source unit 30 that emits ultraviolet light; a first optical mount section 34 that allows detachable installation of a first optical member for performing first optical processing on the ultraviolet light emitted from the ultraviolet light source unit 30; and a second optical mount section 36 that allows detachable installation of a second optical member for performing second optical processing on the ultraviolet light that has passed through the first optical mount section 34.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an irradiation device for irradiating ultraviolet light. [Background technology]

[0002] An ultraviolet irradiation device may be used, for example, as an inspection device for visualizing and inspecting fluorescent particles or the movement / motion of a fluid in a field in which a fluid is present using the fluorescent particles (for example, Patent Document 1). This inspection device includes one or more light sources that irradiate light having a wavelength mainly in the ultraviolet range of 290 nm to 405 nm, a lens that focuses or diverges the ultraviolet or visible light irradiated from the light source, and an imaging unit that photographs the area where a fluid is present. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6713598 Summary of the Invention [Problem to be solved by the invention]

[0004] The device of Patent Document 1 has a problem in that, when irradiating ultraviolet light, it is troublesome to adjust the optical axis. An object of the present invention is to provide an ultraviolet irradiation device in which the optical axis can be easily adjusted. [Means for solving the problem]

[0005] An ultraviolet irradiation device according to one embodiment of the present invention comprises, as a single unit, an ultraviolet light source unit that emits ultraviolet light, a first optical mount unit to which a first optical member that performs a first optical processing on the ultraviolet light emitted from the ultraviolet light source unit can be removably attached, and a second optical mount unit to which a second optical member that performs a second optical processing on the ultraviolet light that has passed through the first optical mount unit can be removably attached, wherein the first optical mount unit houses the first optical member within a cylindrical first mount body, and the first optical member is a collimating lens and a first pinhole body having a first through hole with a predetermined cross-sectional shape. Effect of the Invention

[0006] According to the ultraviolet irradiation device of the present invention, the optical axis can be easily adjusted. [Brief description of the drawings]

[0007] [Figure 1] 1A and 1B are perspective views of an irradiation device according to an embodiment, in which FIG. 1A is a view seen from above the front side, and FIG. 1B is a view seen from above the rear side. [Diagram 2] 1A and 1B are perspective views of the irradiation device with the upper housing removed, where FIG. 1A is a view from above the front side, and FIG. 1B is a view from above the rear side. [Diagram 3] FIG. 2 is a cross-sectional view of the irradiation device with the upper housing removed. [Figure 4] 13A and 13B are cross-sectional perspective views of the ultraviolet light source unit, the mounting plate, and the first mount unit removed from the light source side base, where (a) is a view from below the front, and (b) is a view from above the rear. [Diagram 5] 13A and 13B are perspective views showing the guide light source unit, the attachment plate, and the second mount unit removed from the guide attachment member, where (a) is a view from below the front side, and (b) is a view from above the rear side. [Figure 6] 1A is a cross-sectional view of the first mount portion, FIG. 1B is an oblique view from the upper rear side of the first mount portion after the first optical member and the first fixing member have been removed, and FIG. 1C is an oblique view from the lower front side of the first mount portion after the first optical member and the first fixing member have been removed. [Figure 7] 11A and 11B are cross-sectional perspective views of the second mount unit detached from the light output base, where (a) is a view from below the front side, and (b) is a view from above the rear side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] <Summary> An ultraviolet irradiation device according to one aspect of the embodiment includes an ultraviolet light source unit that emits ultraviolet light, and a guide light light source unit that indicates an irradiation position of the ultraviolet light emitted from the ultraviolet light source unit. In the ultraviolet irradiating device according to another aspect of the embodiment, the guide light emitted by the guide light source unit is visible light, which makes it easier for a user to visually recognize the irradiation position. In an ultraviolet irradiation device according to another aspect of the embodiment, a first optical mount part capable of detachably mounting a first optical member that performs a first optical process on the ultraviolet light emitted from the ultraviolet light source part, a second optical mount part capable of detachably mounting a second optical member that performs a second optical process on the ultraviolet light that has passed through the first optical mount part, and the ultraviolet light source part are provided as one unit, which can simplify the work of aligning the optical axis, etc. In an ultraviolet irradiation device according to another aspect of the embodiment, the first optical mount section accommodates the first optical member in a cylindrical first mount body, the first optical member being a collimator lens and a first pinhole body having a first through hole with a predetermined cross-sectional shape, and the second optical mount section accommodates the second optical member in a cylindrical section, the second optical member being a second pinhole body having a second through hole having the same shape as the first through hole of the first pinhole body and smaller than the first through hole, thereby obtaining irradiation light with less noise. In the ultraviolet irradiation device according to another aspect of the embodiment, an emergency stop button for stopping the irradiation of the ultraviolet light and a shutter for blocking the ultraviolet light emitted from the ultraviolet light source unit when the emergency stop button is activated are further provided, thereby improving safety. In the ultraviolet irradiation device according to another aspect of the embodiment, the shutter is disposed on one side of the ultraviolet light source unit in a direction perpendicular to the optical path of the ultraviolet light, and the guide light source unit is disposed on the other side of the direction perpendicular to the optical path. This makes it possible to reduce the size of the ultraviolet irradiation device in the direction perpendicular to the optical path.

[0009] <Embodiment> Hereinafter, the embodiments will be described in detail with reference to the drawings. 1. Overall structure The description will be given mainly with reference to FIGS. The ultraviolet irradiation device (hereinafter, referred to as "irradiation device") 1 includes at least an ultraviolet light source unit 30 that emits ultraviolet light, and a guide light light source unit 31 that emits guide light that indicates the irradiation position of the ultraviolet light emitted from the ultraviolet light source unit 30. This makes it possible to grasp the irradiation position of the ultraviolet light. The following description will be given mainly with reference to FIG. 2 and FIG. The direction in which ultraviolet rays are emitted is the emission direction, the direction perpendicular to the installation surface of the irradiation device 1 is the orthogonal direction, and the direction perpendicular to the emission direction and the orthogonal direction is the width direction. Here, the installation surface of the irradiation device 1 is a horizontal plane, the emission direction is the front-to-back direction (the side from which it is emitted is the front), the orthogonal direction is the up-down direction, and the width direction is the left-to-right direction. However, depending on how the irradiation device 1 is installed, it may not be the front-to-back, up-down, or left-to-right direction. The ultraviolet light source unit 30 is attached to a light source side base 32. The guide light light source unit 31 here is also attached to the light source side base 32. This makes it possible to easily align the ultraviolet light source unit 30 and the guide light light source unit 31. The irradiation device 1 includes a first mount unit 34 on the light source side base 32 to which a first optical member (33, 43) that performs a first optical process on ultraviolet light emitted from the ultraviolet light source unit 30 can be detachably attached. This makes it easy to align the positions (optical axis) of the first optical member (33, 43) and the ultraviolet light source unit 30. Furthermore, by preparing the first optical member (33, 43) or the first mount unit 34 that includes the first optical member (33, 43) according to the user's application, the user can easily replace the first optical member (33, 43) or the first mount unit 34 according to the application. Furthermore, when replacing the first optical member (33, 43) or the first mount unit 34, it is not necessary to align the replaced first optical member (33, 43) or the first mount unit 34 with the ultraviolet light source unit 30.

[0010] The irradiation device 1 includes a second mount section 36 on the exit side base 37 to which a second optical member (46) can be detachably attached, which performs a second optical process on ultraviolet light emitted from the ultraviolet light source section 30 and passed through the first mount section 34. This allows the user to easily replace the second optical member or the second mount section 36 according to the application by preparing a second optical member or a second mount section 36 equipped with a second optical member according to the application. Furthermore, when replacing the second optical member or the second mount section 36, it is not necessary to align the replaced second optical member or the second mount section 36 with the exit side base 37. Here, in order to distinguish the first optical treatment, the first optical member (33, 43), the first mount portion 34, the second optical treatment, the second optical member (46), and the second mount portion 36, for convenience, the terms "first" and "second" may be added, with "first" referring to the "light source side" and "second" referring to the "exit side." The light source side base 32 and the exit side base 37 are fixed to a main base 38, and the ultraviolet light source section 30, the guide light light source section 31, the first mount section 34, and the second mount section 36 are configured as one unit (hereinafter referred to as an irradiation unit) 3. This makes it easy to adjust the optical axis when the irradiation unit 3 is incorporated into the housing 8, improving productivity. In addition, since they are integrated, an irradiation device 1 with small deviation of the optical axis can be obtained. As a result, an inexpensive and high-quality irradiation device 1 can be provided.

[0011] The irradiation device 1 includes an irradiation unit 3, a circuit unit 6, and a fan unit 7 in a housing 8. The irradiation device 1 here is electrically connected to a power supply control device (not shown) and emits ultraviolet light and guide light in response to an operation from the power supply control device. For this reason, the irradiation device 1 includes a connector 5 for the power supply control device in the housing 8. When the second mount part 36 is attached to the front side of the exit port side base 37, the exit port of the irradiation device 1 is formed by the second mount part 36, and when the second mount part 36 is not attached, the exit port is formed by an ultraviolet ray through hole 371a provided in the exit port side base 37. Each unit will be explained below.

[0012] 2. Each unit (1) Irradiation unit As described above, the irradiation unit 3 includes the ultraviolet light source section 30, the guide light light source section 31, the light source side base 32, the first mount section 34, the second mount section 36, the exit side base 37, and the main base 38, and may further include a heat dissipation section 40 and a shielding section 41. The first mount section 34 may or may not include a first optical member (33, 43). The second mount section 36 may or may not include a second optical member (46).

[0013] (1-1) Ultraviolet emission part 4, the ultraviolet light source unit 30 is configured with a laser (laser diode) 301 that emits ultraviolet light, and is supported by a support plate 303. The ultraviolet light source unit 30 is attached by inserting the laser 301 into the through hole 321a of the light source side base 32, and fixing the support plate 303 that supports the laser 301 from behind to the light source side base 32. Laser 301 has, for example, a wavelength of 355 to 395 nm and an output of 200 to 500 mW. The shape of the emitted light (laser shape) is a dot, and the diameter of the emitted light (beam diameter) is 1 to 4 mm. The support plate 303 has a through hole 303a on the optical path of the guide light.

[0014] (1-2) Guide light emission section The guide light light source unit 31 emits visible light (e.g., red light, green light, blue light, etc.). The guide light light source unit 31 is composed of, for example, an LED or a laser. Here, as shown in FIG. 5, the guide light light source unit 31 is composed of an LED 311 that emits red light. The LED 311 is inserted into a through hole 313a of the guide mounting member 313, and a support plate 315 supporting the LED 311 from behind is fixed to the guide mounting member 313. The guide mounting member 313 is fixed to the light source side base 32. The guide light light source unit 31 is disposed at a position close to the optical axis of the ultraviolet light source unit 30. Here, it is disposed on the other side (upper side) in the up-down direction perpendicular to the emission direction of the ultraviolet light. When the ultraviolet light is converted into parallel light by the collimator lens 33, it is preferable to provide the guide light light source unit 31 so that the optical axis of the guide light is parallel to the ultraviolet light. This makes it possible to know the irradiation position of the ultraviolet light with high accuracy based on the guide light. Guide optical processing may also be performed on the guide light. In this case, the guide optical member may be detachably provided on the guide mount portion 316. Note that the optical processing of the guide light is also distinguished by adding "guide light" to the optical processing, optical member, and mount portion, just like the first optical processing and the second optical processing. When using guide mount portion 316, it is preferable that guide mount portion 316 is detachable from guide attachment member 313. Guide mount portion 316 is configured to be detachable by fitting small diameter portion 316a into the front portion of through hole 313a of guide attachment member 313. The guide mount section 316 has the same configuration as the first mount section 34. This allows for the use of common parts. The guide optical member can be appropriately selected depending on the application of the irradiation device 1, the specifications of the ultraviolet light, the distance from the irradiation surface, etc., or it can be selected not to include it. Examples of the guide optical member include lenses such as a collimator lens that converts light into parallel light, a condenser lens that condenses light, and a diffusing lens that diffuses light, as well as a guide pinhole body that adjusts the shape of the guide light.

[0015] (1-3) Light source base 4, the light source side base 32 has a front plate-shaped portion 321 perpendicular to the emission direction of ultraviolet light. The ultraviolet light source unit 30 and the first mount unit 34 are attached using a through hole 321a that penetrates the front plate-shaped portion 321 in the emission direction (front-rear direction). As shown in FIG. 3, the first mount portion 34 is inserted into the large diameter portion on the front side of the through hole 321a, and the ultraviolet light source portion 30 is inserted into the small diameter portion on the rear side of the through hole 321a. The light source side base 32 has a pair of side plate-like parts 322 extending rearward from the left and right ends of the front plate-like part 321, and the guide light light source part 31 and the guide mount part 316 are attached by using the side plate-like parts 322. For convenience, the front plate-like part 321 and the side plate-like part 322 are labeled with "front" or "side." 3, a guide mounting member 313 for mounting the guide light light source unit 31 and the guide mount unit 316 is fixed to a pair of side plate-like parts 322 of the light source side base 32. The front plate-like part 321 has a through hole 321b in a part corresponding to the optical path of the guide light. The front plate portion 321 and the pair of side plate portions 322 are formed on the upper surface of a gate-shaped portion 323 which is open at the bottom, and a heat dissipation portion 40 (described later) is provided in a recessed portion 323a of the gate-shaped portion 323.

[0016] (1-4) First optical member and first mount portion The explanation will be mainly given with reference to FIG. The first optical member can be appropriately selected depending on the application of the irradiation device 1, the specifications of the ultraviolet light, the distance to the irradiation surface, etc. Examples of the first optical member include a collimator lens 33 that converts the light into parallel light, a condenser lens that condenses the light, a diffusing lens that diffuses the light, and a first pinhole body 43 that adjusts the shape of the ultraviolet light. Here, the collimator lens 33 and the first pinhole body 43 are disposed in a through hole 341 of the first mount portion 34. The first mount unit 34 has a cylindrical portion 342 through which ultraviolet light passes. From the rear side, the first pinhole body 43 and the collimator lens 33 are housed inside the cylindrical portion 342. A step 343 is provided on the outer periphery of the cylindrical portion 342, and a small diameter portion 344 is inserted into a through hole 321a (see FIG. 4) of the light source side base 32. This allows the first mount unit 34 to be detachably attached to the light source side base 32. The first pinhole body 43 and the collimator lens 33 are fixed by a first fixing member 44 so as to be replaceable. The first pinhole body 43 is composed of a first plate portion 431 having the same cross-sectional shape as the through-hole 341 of the first mount portion 34, and a first through-hole 433 provided in the first plate portion 431. The shape of the first through-hole 433 is appropriately determined depending on the application of the device, and is circular here. The hole diameter of the first through-hole 433 is smaller than the diameter (beam diameter) of the light emitted from the ultraviolet light source portion 30. This makes it possible to adjust the shape of the light emitted from the ultraviolet light source portion 30 or reduce the diameter. The first fixing member 44 here is configured by a threaded body having a threaded portion (not shown) 441 on the outer circumferential surface, and has a through hole 443 in the center and a groove 445 for a tool such as a screwdriver on the front surface. The first fixing member 44 screws into a threaded portion 346 formed in the through hole 341 of the first mounting portion 34. Since the first pinhole body 43 is housed in the first mount portion 34, the number of parts is reduced compared to the case where the first pinhole body is provided separately from the collimator lens 33. In addition, adjustment of the optical axis of the through hole 443 of the first pinhole body 43 is not required, and an inexpensive irradiation device 1 can be obtained. For convenience, the first pinhole body 43, the first fixing member 44, the second pinhole body 46, and the second fixing member 47 are labeled "first" or "second" to distinguish them from one another.

[0017] (1-5) Second optical member and second mount portion The following description will be mainly given with reference to FIG. The second optical member, like the first optical member, can be appropriately selected depending on the application of the irradiation device 1, the specifications of the ultraviolet light, the distance from the irradiation surface, etc. Examples of the second optical member include lenses such as a collimator lens that converts the light into parallel light, a condenser lens that condenses the light, and a diffusion lens that diffuses the light, as well as a second pinhole body 46 that adjusts the shape of the ultraviolet light. Here, one second mount unit 36 ​​includes the second pinhole body 46, and the other second mount unit 36 ​​does not include the second optical member. The second mount section 36 has a cylindrical section 362 through which ultraviolet light passes. A lens and the second pinhole body 46 can be housed inside the cylindrical section 362. Here, the second pinhole body 46 is housed in the second mount section 36 on the rear side (the side closer to the ultraviolet light source section 30) and is fixed by a second fixing member 47 (see FIG. 3). A step 363 is provided on the outer periphery of the cylindrical portion 362, and a small diameter portion 364 fits into an ultraviolet through hole 371a of the emission port side base 37. In this way, the second mount portion 36 is detachably attached to the emission port side base 37. The second pinhole body 46 is composed of a second plate portion having the same cross-sectional shape as the through hole of the second mount portion 36, and a second through hole provided in the second plate portion. The second through hole has the same shape as the first through hole 433. When the second mount portion 36 has the same configuration as the first mount portion 34 (when used together), the second pinhole body 46 has a second through hole of a different size than the first pinhole body 43. The second through hole of the second pinhole body 46 is smaller than the first through hole 433 of the first pinhole body 43. This allows the emitted light (ultraviolet light) from the ultraviolet light source unit 30 to be a dot light with a small diameter and a predetermined shape (for example, a perfect circle) with less noise. Since the second pinhole body 46 is housed in the second mount portion 36, the number of parts is reduced compared to the case where the second pinhole body is provided separately from the second mount portion. In addition, adjustment of the optical axis of the second through hole of the second pinhole body 46 is not required, and an inexpensive irradiation device 1 can be obtained. The second fixing member 47 is configured here by a threaded body having a threaded portion (not shown) on the outer circumferential surface, and has a through hole in the center and a groove for a tool such as a screwdriver on the front surface. The second fixing member 47 screws into the threaded portion formed in the through hole of the second mounting portion 36. When the second mount portion 36 has the same configuration as the first mount portion 34 (when used interchangeably), the second fixing member 47 has the same configuration as the first fixing member 44.

[0018] (1-6) Exit base The following description will be mainly given with reference to FIG. The emission port side base 37 has a plate-shaped portion 371, and has an ultraviolet through hole 371a and a guide light through hole 371b on the optical paths of the ultraviolet light and the guide light. The ultraviolet through hole 371a and the guide light through hole 371b are formed to have a constant hole diameter along the respective optical paths. Here, the second mount parts 36 are attached to both the rear and front parts of the ultraviolet ray through hole 371a, and one of the second mount parts 36 (the rear second mount part 36) houses the second pinhole body 46. The other second mount part 36 (the front second mount part 36) does not house an optical member, but may house one depending on the application, etc.

[0019] (1-7) Main Bass The following description will be mainly given with reference to FIG. The main base 38 is composed of a flat plate portion 381 parallel to the installation surface of the irradiation device 1. The light exit side base 37 is fixed to the front portion of the main base 38, and the light source side base 32 is fixed to a portion spaced rearward from the light exit side base 37. A heat dissipation section 40 is provided between the main base 38 and the light source side base 32, and a shielding section 41 is provided between the exit side base 37 and the light source side base 32. From the viewpoint of an inexpensive and high quality (optical axis) irradiation device 1, the heat dissipation section 40 and the shielding section 41 do not have to be provided. However, by providing the heat dissipation section 40, the light emission efficiency of the ultraviolet light source section 30 can be increased. By providing the shielding section 41, it is possible to easily temporarily stop the emission of ultraviolet light and increase safety.

[0020] (1-8) Heat dissipation part The heat dissipation section 40 includes a first cooling body 401 that is thermally coupled (in close contact) to the light source side base 32, and a second cooling body 403 that is thermally coupled (in close contact) to the first cooling body 401. The first cooler 401 is, for example, a Peltier cooler, and is coupled on the heat absorption side to the light source side base 32 and on the heat generation side to the second cooling body 403 . A heat sink having a plurality of fins is used as the second cooling body 403. The second cooling body 403 is disposed inside the gate-shaped portion 323 of the light source side base 32, and the first cooler 401 is disposed between the upper wall portion of the gate-shaped portion 323 and the second cooling body 403.

[0021] (1-9) Shielding part The following description will be mainly made with reference to FIG. 2 and FIG. The shielding unit 41 includes a motor 411 and a shutter 413. The motor 411 of the shielding unit 41 is disposed below the optical path of the ultraviolet light. The motor 411 of the shielding unit 41 is supported by a support plate 415, which is fixed to the main base 38. This allows the space between the main base 38 and the optical path of the ultraviolet light to be effectively utilized. In other words, this contributes to the miniaturization of the irradiation device 1. In addition, since the shielding unit 41, the optical path of the ultraviolet light, and the optical path of the guide light are aligned in the vertical direction, the device can be further miniaturized. The shielding unit 41 is configured so that when an emergency stop button (not shown) is activated, the shutter 413 mechanically blocks the ultraviolet light emitted from the ultraviolet light source unit 30. This can improve safety.

[0022] (2) Connectors, circuit units, fan units The following description will be mainly made with reference to FIG. 2 and FIG. The irradiation device 1 includes a connector 5 for a power supply control device (not shown) on the rear wall 815 of the housing 8. The connector 5 is connected to the power supply control device by a connection cable. The connector 5 is connected to the circuit unit 6 via wiring 51. This not only supplies the necessary power to the irradiation device 1, but also inputs an ON / OFF signal for ultraviolet emission, an ON / OFF signal for guide light emission, an emergency stop signal, an output signal (dimming signal) of the ultraviolet light source unit 30, and the like to the circuit unit 6. The wiring connected from the circuit unit 6 to the ultraviolet light source unit 30, the guide light light source unit 31, the first cooler 401, the shielding unit 41, and the fan unit 7 is omitted from the illustration.

[0023] The circuit unit 6 has circuits for generating power to be supplied to the ultraviolet light source section 30, the guide light light source section 31, the fan unit 7, and the first cooler 401, and for controlling each section according to each signal. The circuit is configured by mounting a plurality of electronic components (not shown) on a board 61. The board 61 is fixed in a state in which it straddles the light source side base 32 and the exit side base 37. This allows the space between the light source side base 32 and the exit side base 37 to be effectively utilized. In addition, since the circuit unit 6 is provided on the opposite side to the movable area of ​​the shutter 413 when viewed from the front-rear direction, they do not interfere with each other. The fan unit 7 exhausts air from inside the housing 8. The fan unit 7 is composed of a motor 71 and a fan 73.

[0024] (3) Housing The description will be mainly given with reference to FIGS. 1, the housing 8 includes a lower housing 81 and an upper housing 82. The irradiation unit 3, the connector 5, the circuit unit 6, and the fan unit 7 are disposed in the lower housing 81. As shown in FIGS. 2 and 3, the lower housing 81 has a lower wall portion 811, a lower front wall portion 813, and a rear wall portion 815. The main base 38 is fixed to the lower wall portion 811. Here, the main base 38 and the lower wall portion 811 are spaced apart. This makes it possible to prevent the lower wall portion 811 from becoming excessively hot due to heat from the ultraviolet light source portion 30. Note that a space (gap) is provided between the second cooling body 403 and the main base 38, making it difficult for heat from the ultraviolet light source portion 30 to be transmitted to the lower wall portion 811. The lower front wall portion 813 has a notch 813a on the upper end side. With the second mount portion 36 of the irradiation unit 3 positioned in this notch 813a, the lower front wall portion 813 is connected to the emission port side base 37 fixed to the main base 38. The lower front wall portion 813 has a through groove 813b for allowing air to enter the inside of the housing 8. The connector 5 and the fan unit 7 are attached to the rear wall portion 815 . As shown in FIG. 1, the upper housing 82 has an upper wall portion 821, a side wall portion 823, and an upper front wall portion 825. The upper front wall portion 825 has a notch 825a at its lower end. The upper housing 82 is detachably attached to the lower housing 81 with the second mount portion 36 of the irradiation unit 3 positioned in the notch 825a.

[0025] <Modification> Although the irradiation device according to the embodiment has been described above, it is not limited to this embodiment, and may be modified as follows. In addition, the embodiment may be combined with the modified example, or the modified examples may be combined with each other. In addition, examples not described in the embodiment or modified example, or design changes within the scope of the gist of the present invention are also included in the present invention.

[0026] 1.Ultraviolet irradiation device Although the irradiation device 1 in the embodiment is connected to a separate power supply control device and controlled by the power supply control device, the power supply control device may be incorporated as an integrated unit.

[0027] 2. Irradiation unit The irradiation unit 3 integrally includes the ultraviolet light source section 30, the guide light light source section 31, the light source side base 32, the first optical member (33, 43), the first mount section 34, the second optical member (46), the second mount section 36, the exit side base 37, and the main base 38, but each of these may be provided separately. However, in consideration of productivity, misalignment of the optical axis, and the like, it is better to provide them integrally. Note that, when focusing on the irradiation of ultraviolet light, which is the main component, the guide light light source section does not need to be provided integrally. Although the light source side base 32, the emission port side base 37 and the main base 38 are configured as separate bodies, some or all of these bases may be configured as an integrated part. The irradiation unit 3 includes the first mount portion 34 and two second mount portions 36, but it is not necessary to include all of these, and it may include mount portions that do not house optical members inside. In other words, these are appropriately selected depending on the purpose of use of the device, but the range of application is wider if the device includes these. When focusing on the productivity and quality of the irradiation unit that irradiates ultraviolet light, it is not necessary to provide the guide light source unit, which solves the problem of the troublesome adjustment of the optical axis of the ultraviolet light.

[0028] 3. UV rays The ultraviolet light source unit is configured with a laser diode, but may be configured with an LED. The shape of the ultraviolet light on the irradiation surface is circular, but it may be a polygonal shape such as a square, or a line shape. These shapes can be changed appropriately depending on the shape of the through hole of the pinhole body housed in the mount section, and a slit body having a slit-shaped through hole (through groove) in a plate section may also be included in the first optical member or the second optical member.

[0029] 4. Guide light (1) In the embodiment, one guide light light source unit 31 is provided, but a plurality of guide light light source units may be provided. When using multiple guide lights, if the irradiated ultraviolet light is parallel light, it is preferable to arrange the guide lights so that they are also parallel to the ultraviolet light, and if the ultraviolet light is diffused light, it is preferable to arrange the guide lights so that they irradiate the outer periphery of the diffused light. When a plurality of guide beams are used, it is preferable that the ultraviolet ray irradiation position is within an area formed by connecting the irradiation positions of the plurality of guide beams. (2) In the embodiment, the guide light source is disposed above the ultraviolet light source unit, but may be disposed in another position. However, in terms of weight balance, it is preferable to provide the guide light source on the opposite side of the installation surface with respect to the ultraviolet light source unit and provide the shielding portion on the installation surface side in relation to the shielding portion and the circuit unit. When reducing the dimension in the direction perpendicular to the installation surface, it is preferable to arrange the shielding portion and the guide light source portion in the width direction perpendicular to the direction perpendicular to the installation surface and the emission direction. (3) The guide light source unit 31 is mounted on the light source side base 32 via the guide mounting member 313. However, if the influence of heat from the ultraviolet light source unit is small, it may be mounted directly on the light source side base. Further, the guide light light source section 31 is disposed behind the ultraviolet light source section 30, but may be disposed in front of the ultraviolet light source section, or may be disposed next to the ultraviolet light source section in the width direction.

[0030] 5. Mounting section The first mount portion 34, the second mount portion 36, and the guide mount portion 316 may have the same configuration or different configurations. If they have the same configuration, it is possible to standardize the components. Of the front and rear second mount parts 36, the second pinhole body 46 is provided in the rear second mount part 36, but the second pinhole body 46 may be provided in the front second mount part 36, or the second pinhole body 46 and the third pinhole body may be provided in each of the front and rear second mount parts 36. When a third pinhole body is provided, it is preferable that the third through hole of the third pinhole body has the same shape as the second through hole and is smaller than the second through hole. In the embodiment, the first optical member (33, 43) is housed in the first mount portion 34, and the second optical member (46) is housed in the second mount portion 36. However, for example, if the first mount portion 34 is not provided on the light source side base 32 or the first optical member (33, 43) is not housed in the first mount portion 34, the mount portion 36 provided on the exit side base 37 and closer to the ultraviolet light source unit 30 may be the first mount portion, and the optical member housed in that mount portion may be the first optical member. [Explanation of symbols]

[0031] 1 Irradiation device (ultraviolet irradiation device) 3. Irradiation unit 30 Ultraviolet light source section 31 Guide light source unit 32 Light source base 33 Collimating Lens 34 First Mounting Section 36 Second mounting part 37 Exit port base 43 First pinhole body 46 Second pinhole body

Claims

1. an ultraviolet light source unit that emits ultraviolet rays; a first optical mount unit capable of detachably mounting a first optical member that performs a first optical process on the ultraviolet light emitted from the ultraviolet light source unit; a second optical mount unit to which a second optical member that performs a second optical process on the ultraviolet light that has passed through the first optical mount unit can be detachably attached; as one unit, The first optical mount portion accommodates the first optical member in a cylindrical first mount body, and the first optical member is a collimator lens and a first pinhole body having a first through hole with a predetermined cross-sectional shape. Ultraviolet irradiation device.

2. The second optical mount portion accommodates the second optical member in a cylindrical portion, and the second optical member is a second pinhole body having a second through hole having the same shape as the first through hole of the first pinhole body and smaller than the first through hole.

2. The ultraviolet irradiation device according to claim 1.

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