Heating lamp, light source unit, optical heating device

Abstract

The present invention provides a heating lamp, a light source unit, and a light heating device that enable precise irradiation of heating light onto an object to be heated. [Solution] The device comprises a discharge tube, a filament, a focusing optical system, a reflective member that reflects light emitted from the filament and traveling toward the opposite side of the focusing optical system, a power supply pin provided to protrude outward from the end of the discharge tube, a sealing portion that seals the end of the discharge tube in a first direction and sandwiches a conductive member that electrically connects the filament and the power supply pin, a first recess into which the end of the discharge tube is inserted in a first direction, a second recess into which the end of the focusing optical system is inserted in a first direction, a base provided at the bottom that restricts the movement of the end of the discharge tube in a first direction and has a first hole through which the power supply pin is inserted, and a second hole through which a power supply wire connected to the power supply pin is inserted.

Description

Technical Field

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[0001] The present invention relates to a heating lamp, a light source unit, and a light heating device.

Background Art

[0002] Conventionally, as a heating device for molding a plastic bottle or fixing toner in a copying machine or a printer, a heating device equipped with a heating lamp has been known. And Patent Document 1 below discloses a configuration of a heating lamp in which bases are attached to both ends of a light emitting tube.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the types and shapes of articles to be heat-treated are becoming more diverse according to various purposes. And in recent years, there has been an expectation for a heating lamp that can perform heat treatment on a heating object having a complex shape or locally apply heat treatment to a part of the heating object.

[0005] However, in the heating lamp as described in Patent Document 1 above, since the heating light (hereinafter referred to as "heating light") is irradiated over a wide range, there is a problem that precise heat treatment is difficult.

[0006] Further, when heating light is emitted over a wide range from one heating lamp, in a light heating device equipped with a plurality of heating lamps, the heating light emitted from each heating lamp overlaps, so a design considering the heat distribution is required

[0007] Such designs become more difficult as the object being heated becomes smaller, and when the object is very small compared to the heating lamp, it may become difficult to achieve the desired heat distribution. Furthermore, if adjacent heating lamps are configured to irradiate each other with high-intensity heating light, it can affect the lifespan of the heating lamps.

[0008] In view of the above problems, the present invention aims to provide a heating lamp, a light source unit, and a light heating device that can precisely irradiate an object to be heated with heating light. [Means for solving the problem]

[0009] The heating lamp of the present invention is A discharge tube extending in the first direction, A filament extending in the first direction is housed within the discharge tube, A focusing optical system extending in the first direction, positioned near the light-emitting tube, which focuses at least a portion of the light emitted from the filament and exited the light-emitting tube, A reflective member that reflects light emitted from the filament and traveling toward the opposite side of the focusing optical system so that it travels toward the focusing optical system, In the first direction, a power supply pin is provided so as to protrude outward from the end of the discharge tube, A sealing portion that seals the light-emitting tube at the first end, with a conductive member sandwiched between the filament and the power supply pin for electrically connecting them, The present invention is characterized by comprising a base having a first recess into which the end of the light-emitting tube is inserted in the first direction, a second recess into which the end of the light-gathering optical system is inserted in the first direction, a first hole provided at the bottom of the first housing portion that restricts the movement of the end of the light-emitting tube in the first direction for inserting the power supply pin, and a second hole for inserting a power supply line connected to the power supply pin.

[0010] Light emitted from the filament is radiated in all directions around the axis of the discharge tube. Light traveling away from the object being heated, as viewed from the axis of the discharge tube, is reflected by the reflective material so that it is directed towards the object being heated.

[0011] Furthermore, at least a portion of the light emitted from the filament and traveling toward the object to be heated, and the light reflected by the reflective member and traveling toward the object to be heated, have their divergence angles reduced by the focusing optical system.

[0012] Here, unless the direction of propagation is adjusted by some optical system, the light emitted from the discharge tube and incident on the focusing optical system is not parallel light. Therefore, how the light propagates after being emitted from the discharge tube and incident on the focusing optical system depends on the distance between the discharge tube and the focusing optical system.

[0013] Furthermore, even if the positions of the discharge tube and the focusing optical system are precisely adjusted only at a specific position in the first direction, if the distance between the discharge tube and the focusing optical system changes as you move from one end of the discharge tube to the other end, the path of the light emitted from the focusing optical system will gradually change in the first direction.

[0014] To ensure a homogeneous heat distribution in a desired region of the object being heated, the distance between the discharge tube and the focusing optical system is arranged to be approximately the same in the first direction. Depending on the purpose, the distance between the discharge tube and the focusing optical system may be adjusted as appropriate by intentionally tilting them.

[0015] However, in either case, if the distance between the discharge tube and the focusing optical system changes, it may become impossible to perform the desired heating treatment on the object to be heated, or heating light may be irradiated onto areas that should not be heated.

[0016] Furthermore, when mounted on a light heating device, even if the separation distance between the arc tube and the condenser optical system is precisely adjusted, if the device continues to be used, the mutual separation distance may gradually change due to vibration or the like. In this case, the performance of the heat treatment of the light heating device will change over time.

[0017] Therefore, with the above configuration, since the heating lamp has the arc tube and the condenser optical system held by a single base, the separation distance between the arc tube and the condenser optical system is adjusted. Furthermore, even when mounted on a light heating device and continuously used, the separation distance between the arc tube and the condenser optical system hardly changes.

[0018] As described above, the heating lamp with the above configuration has improved heating efficiency compared to conventional heating lamps, and in the first direction, it can maintain the heat distribution of the heating light on the object to be heated to be a desired distribution. Also, it is possible to suppress the manufacturing of the heat treatment of the light heating device from changing over time. Therefore, the heating lamp with the above configuration can irradiate the object to be heated with precise heating light.

[0019] Here, the first recess and the second recess may be integrally formed within the base so as to be substantially one recess. The specific shapes of the first recess and the second recess will be described while referring to the drawings in the section "Mode for Carrying Out the Invention".

[0020] In the above heating lamp, The second hole may be formed so as to extend in a direction orthogonal to the first direction when viewed from the power supply pin.

[0021] Furthermore, in the above heating lamp, The second hole may be formed so as to extend toward the side opposite to the condenser optical system when viewed from the power supply pin.

[0022] When the power supply line is connected to the base in the first direction, when mounting the heating lamp, the optical heating device must secure a space with a length in the first direction that is equal to or greater than the combined length of the arc tube and the base.

[0023] When multiple heating lamps are mounted on the optical heating device, the direction in which the heating lamps are arranged and the direction facing away from the object to be heated often inevitably form spaces for arranging the heating lamps and the power supply device, etc., making it easy to secure wiring space.

[0024] Particularly, the side opposite to the object to be heated is less likely to be irradiated with heating light and the thermal damage is relatively reduced, so it can be said to be more suitable for the wiring space.

[0025] Therefore, the heating lamp with the above configuration can suppress the enlargement of the optical heating device. Also, for a heating lamp configured such that the power supply line is wired on the side opposite to the object to be heated, i.e., on the side opposite to the condenser optical system, when viewed from the tube axis of the arc tube, the thermal damage to the power supply line during use is further reduced.

[0026] The above heating lamp The power supply pin and the power supply line may be connected by welding.

[0027] For the heating lamp with the above configuration, since the power supply pin and the power supply line are more firmly connected, the durability is further improved.

[0028] The above heating lamp The power supply pin and the power supply line may be connected by caulking.

[0029] For the heating lamp with the above configuration, the connection between the power supply pin and the power supply line is simplified, and the manufacturing process and maintenance process become more convenient.

[0030] In the above heating lamp, The reflecting member may be a reflecting film provided on the tube wall of the arc tube.

[0031] Since the heating lamp with the above configuration does not require a separate reflective element, it can be made smaller, contributing to the overall miniaturization of the optical heating device.

[0032] The light source unit of the present invention is It is characterized by being equipped with multiple heating lamps as described above.

[0033] The above light source unit is The base may be integrally formed in at least some of the multiple heating lamps.

[0034] In the light source unit with the above configuration, the bases of multiple heating lamps are integrally formed, maintaining the desired spacing between each discharge tube. Furthermore, since it is not necessary to individually form the structures that support the bases, the space required for arranging the multiple heating lamps in the light source unit can be reduced, resulting in a smaller overall device size. In addition, the light source unit allows for the simultaneous attachment and detachment of multiple heating lamps, making manufacturing and maintenance operations relatively simple.

[0035] The optical heating device of the present invention is It is characterized by being equipped with multiple heating lamps as described above.

[0036] The above-mentioned optical heating device is The base may be integrally formed in at least some of the multiple heating lamps.

[0037] In the above-described optical heating device, the bases of the multiple heating lamps are integrally formed, maintaining the desired spacing between each light-emitting tube. Furthermore, since it is not necessary to individually form the structures that support the bases, the space required for arranging the multiple heating lamps in the optical heating device can be reduced, resulting in a smaller overall device size. In addition, the optical heating device allows for the simultaneous attachment and detachment of multiple heating lamps, making manufacturing and maintenance operations relatively simple. [Effects of the Invention]

[0038] According to the present invention, a heating lamp and a light heating device capable of precisely irradiating an object to be heated with heating light are realized. [Brief explanation of the drawing]

[0039] [Figure 1] This is a schematic overall perspective view illustrating one embodiment of a light heating device. [Figure 2] This is a schematic diagram of the light source unit shown in Figure 1, viewed from the -Z side. [Figure 3] This is a schematic cross-sectional view of the light source unit shown in Figure 1, viewed in the Y direction. [Figure 4] This is a cross-sectional view of the heating lamp as seen from the -X side. [Figure 5] This is an overall perspective view of the base located on the +X side of the pair of bases that make up the heating lamp. [Figure 6] This is a view of the base shown in Figure 5 from the -X side. [Figure 7] This is a schematic diagram showing the setup of the verification experiment apparatus. [Figure 8] This is a heat distribution diagram for each sample. [Figure 9] This is a schematic overall perspective view showing the base of one embodiment of a heating lamp. [Figure 10] This is a schematic overall perspective view showing the base of one embodiment of a heating lamp. [Figure 11] This is a schematic overall perspective view showing the base of one embodiment of a heating lamp. [Modes for carrying out the invention]

[0040] The heating lamp and optical heating device of the present invention will be described below with reference to the drawings. Note that the following drawings relating to the heating lamp and optical heating device are schematic representations, and the dimensional ratios and numbers shown in the drawings do not necessarily correspond to the actual dimensional ratios and numbers.

[0041] [Light heating device 1] Figure 1 is a schematic overall perspective view showing one embodiment of the optical heating device 1. As shown in Figure 1, the optical heating device 1 of this embodiment comprises a light source unit 10 and a base 2. Figure 2 is a schematic drawing of the light source unit 10 of Figure 1 as viewed from the -Z side, and Figure 3 is a schematic cross-sectional view of the light source unit 10 of Figure 1 as viewed in the Y direction.

[0042] In the following explanation, as shown in Figure 2, the direction in which the heating lamps 20 extend will be referred to as the X direction (first direction), the direction in which the heating lamps 20 are arranged will be referred to as the Y direction, and the direction perpendicular to the X and Y directions will be referred to as the Z direction.

[0043] Similarly, when expressing direction, if positive and negative directions are distinguished, they are written with a positive or negative sign, such as "+Z direction" or "-Z direction." If the direction is expressed without distinguishing between positive and negative directions, it is simply written as "Z direction."

[0044] As shown in Figure 1, the optical heating device 1 irradiates heating light Lx onto the object to be heated W1 placed on the base 2. The optical heating device 1 may also be configured to irradiate heating light Lx onto the object to be heated W1 while it is being held by a transport arm, for example, and the light source unit 10 and the object to be heated W1 may be configured to face each other in directions other than the Z direction.

[0045] Furthermore, the object to be heated W1 can be any article that can be processed by irradiation with heating light Lx, and specific examples include PET bottle preforms and semiconductor substrates. The object to be heated W1 can also be an article that is dried by irradiation with heating light Lx, and examples include printing paper or a specified board material to which ink, organic solvents, or cleaning solutions are attached.

[0046] The base 2 is a component equipped with a support column 2a for supporting the light source unit 10. Note that the base 2 is not limited to the configuration shown in Figure 2; for example, it may be a transport path for transporting the object to be heated W1.

[0047] [Light source unit 10] As shown in Figure 3, the light source unit 10 comprises a housing 11, a power supply unit 12, and a plurality of heating lamps 20.

[0048] As shown in Figures 2 and 3, the housing 11 is provided with a pair of support parts (11a, 11a) that support both ends of each of the multiple heating lamps (20, 20, 20, 20, 20, 20, 20).

[0049] As shown in Figure 3, the power supply unit 12 is connected to the power supply line 26 of the heating lamp 20, which will be described later, and is a device that supplies power to the heating lamp 20 for lighting. In this embodiment, the power supply unit 12 is located inside the housing 11, but it may also be located outside the housing 11.

[0050] [Heating lamp 20] Figure 4 is a cross-sectional view of the heating lamp 20 as seen from the -X side. As shown in Figures 3 and 4, the heating lamp 20 comprises a discharge tube 21, a filament 22, a pair of sealing parts (23, 23), a pair of bases (24, 24), a pair of power supply pins (25, 25), a pair of power supply lines (26, 26), a light-gathering optical system 27, and a reflective film 28. Note that in Figure 3, for illustrative purposes, the reflective film 28 is omitted from the illustration, and a portion hidden by the base 24 is shown by a dashed line.

[0051] As shown in Figure 3, the discharge tube 21 is a tube extending in the X direction, with a filament 22 housed inside, and both ends in the X direction sealed by seal portions (23, 23). Halogen gas is sealed inside the discharge tube 21.

[0052] The discharge tube 21 can be any tube made of a material that is transparent to the heating light Lx emitted from the filament 22, for example, a quartz glass tube. Here, "transmissive" means that the transmittance to light in a predetermined wavelength band is 50% or more.

[0053] As shown in Figure 3, the filament 22 is a light-emitting body extending in the X direction, formed by winding a metal wire, and is supported by a supporter 22a within the space inside the light-emitting tube 21. The filament 22 emits light when power is supplied from the power supply unit 12 via the seal portion (23, 23), power supply pins (25, 25), and power supply line (26, 26).

[0054] In this embodiment, as shown in Figure 4, the central axis of the filament 22 is configured to coincide with the tube axis 21a of the discharge tube 21, but the central axis of the filament 22 and the tube axis 21a of the discharge tube 21 do not necessarily have to coincide. Also, whether or not to provide the supporter 22a is optional.

[0055] The sealing portion 23 is the part in which the conductive member 23a is sandwiched, sealing the space inside the discharge tube 21. The conductive member 23a electrically connects one end of the filament 22 to the power supply pin 25 which extends outward from the discharge tube 21 in the X direction.

[0056] Figure 5 is an overall perspective view of the base 24 located on the +X side, one of a pair of bases (24,24) provided by the heating lamp 20, and Figure 6 is a view of the base 24 of Figure 5 from the -X side. As shown in Figures 5 and 6, the base 24 includes a first recess 24a into which the seal portion 23 of the discharge tube 21 is inserted, and a second recess 24b into which the end of the focusing optical system 27 in the X direction is inserted.

[0057] Furthermore, as shown in Figures 5 and 6, the base 24 includes a first hole 24h extending in the X direction for inserting a power supply pin 25, and a second hole 24p extending in the Z direction for inserting a power supply line 26 connected to the power supply pin 25, both provided in the bottom 24c of the first recess 24a. In addition, the base 24 includes a third hole 24q extending in the Y direction for forming a mechanism for connecting the power supply pin 25 and the power supply line 26, or for performing the operation of connecting the power supply pin 25 and the power supply line 26.

[0058] The first recess 24a, into which the end of the discharge tube 21 is inserted, restricts the movement of the discharge tube 21 in the Y and Z directions, while the bottom 24c of the first recess 24a restricts the movement of the end of the discharge tube 21 in the X direction. The bottom 24c does not need to be flat and may have any shape depending on the shape of the end of the discharge tube 21 in the X direction.

[0059] The second recess 24b, into which the end of the focusing optical system 27 is inserted, suppresses the movement of the focusing optical system 27 in the Y and Z directions, and the bottom 24d of the second recess 24b restricts the movement of the end of the focusing optical system 27 in the X direction. The bottom 24d does not need to be flat and may have any shape depending on the shape of the end of the focusing optical system 27 in the X direction.

[0060] The direction in which the second hole 24p is formed is arbitrary, but it is preferable that it is formed so that when the optical heating device 1 is attached, the power supply line 26 is pulled out toward the power supply unit 12, and extends in the Z direction toward the +Z side wall of the base 24 from where the tip of the power supply pin 25 inserted through the first hole 24h is located.

[0061] The third hole 24q can be used, for example, to weld the feed pin 25 and the feed wire 26. The configuration in which the feed pin 25 and the feed wire 26 are welded together provides a stronger connection between the feed pin 25 and the feed wire 26.

[0062] Furthermore, the third hole 24q can be used, for example, as a hole for attaching a crimp that clamps the power supply pin 25 and the power supply wire 26. The configuration in which the power supply pin 25 and the power supply wire 26 are connected by clamping them together with a crimp makes it easier to replace the discharge tube 21 or the power supply wire 26, and simplifies maintenance.

[0063] The third hole 24q may be used for purposes other than those mentioned above, and may not be provided at all. The heating lamp 20 may also be configured, for example, by inserting the power supply line 26 through the second hole 24p, then through the first hole 24h, connecting the power supply pin 25 and the power supply line 26 on the outside of the base 24 by welding or soldering, and then inserting the end of the light-emitting tube 21 through the first recess 24a.

[0064] Furthermore, the functions of the second hole 24p and the third hole 24q may be reversed. Specifically, for example, the power supply line 26 may be inserted through the third hole 24q.

[0065] The focusing optical system 27 is an optical system that focuses the heating light Lx emitted from the filament 22 and emitted from the discharge tube 21. In this embodiment, as shown in Figure 4, the reflective film 28 is configured to allow all of the heating light Lx emitted from the discharge tube 21 to enter the focusing optical system 27. However, the heating light Lx that enters the focusing optical system 27 may be only a portion of the heating light Lx emitted from the discharge tube 21.

[0066] The material of the focusing optical system 27 in this embodiment is glass, but other materials that suppress the intensity of light in certain wavelength ranges of the intensity spectrum of the heating light Lx may also be used, such as aluminum oxide (Al2O3), magnesium oxide (MgO), zirconium dioxide (ZrO2), or sapphire glass. By using a focusing optical system 27 made of such a material, it becomes less likely that light other than the desired wavelength range will be irradiated onto the object to be heated W1, and the deterioration of the object to be heated W1 due to the heat treatment can be further suppressed.

[0067] Furthermore, although the condensing optical system 27 in this embodiment is a cylindrical lens extending in the X direction, it may also be, for example, a convex lens arranged in multiple directions in the X direction and coupled to one another.

[0068] Furthermore, in this embodiment, the width of the condensing optical system 27 in the Y direction is the same as the width of the discharge tube 21, but the width of the condensing optical system 27 in the Y direction and the width of the discharge tube 21 may be different.

[0069] The reflective film 28 is provided on the outer wall surface 21p of the discharge tube 21 and reflects light emitted from the filament 22 that is traveling toward the opposite side of the focusing optical system 27 (+Z side) so that it travels toward the focusing optical system 27 side (-Z side).

[0070] Furthermore, in this embodiment, the reflective film 28 is formed over a range of 270° in the circumferential direction of the discharge tube 21 when viewed in the X direction, so that all of the heated light Lx emitted from the discharge tube 21 is incident on the focusing optical system 27.

[0071] The reflective film 28 in this embodiment is a reflective film made by sintering particles containing silicon dioxide (SiO2), but it may also be a reflective film made by sintering particles containing, for example, aluminum oxide (Al2O3), boron nitride (BN), titanium dioxide (TiO2), or barium sulfate (BaSO4), or it may be a reflective film made by depositing a metal. Furthermore, the position where the reflective film 28 is provided may be on the inner wall surface 21q of the discharge tube 21.

[0072] Furthermore, a configuration that reflects the heating light Lx traveling toward the opposite side of the focusing optical system 27 (+Z side) toward the focusing optical system 27 side (-Z side) may be, for example, a metal reflector placed on the +Z side of the discharge tube 21. Another configuration may be, for example, a reflective surface formed on the -Z side wall of the housing 11, so that the housing 11 functions as a reflective member.

[0073] In the above configuration, the heating lamp 20 is restricted by the base 24 from moving in each direction between the discharge tube 21 and the focusing optical system 27. As a result, the positional relationship between the discharge tube 21 and the focusing optical system 27 does not change over time and is always maintained in the desired state.

[0074] [Verification experiment] Here, the inventors conducted verification experiments to explore the conditions for utilizing more of the heating light Lx emitted from the filament 22 for the heating treatment of the object W1. The details of these verification experiments will be described below.

[0075] First, the inventors confirmed the heat distribution of the heating light Lx in a state where the focusing optical system 27 is not provided and the reflective film 28 is provided over half of the circumferential region of the discharge tube 21.

[0076] (Verification conditions) Figure 7 is a schematic diagram showing the apparatus configuration of this verification experiment. As shown in Figure 7, the inventors placed sensors 30 around the heating lamp 20 and measured the light intensity in each direction when the heating lamp 20 was lit, thereby obtaining the heat distribution in the circumferential direction. At this time, the distance between the tube axis 21a of the discharge tube 21 and the light receiving part 31 of the sensor 30 was defined as d, and the angle θ was defined as the angle in the circumferential direction of the discharge tube 21 with the tube axis 21a as the center and the direction of the optical axis 27a of the light-gathering optical system 27 as the reference (0°).

[0077] The spacing distance d was set to three patterns: 50 mm, 75 mm, and 100 mm.

[0078] The angle θ ranged from -180° to +180°, and the light intensity was measured at 1° intervals.

[0079] The diameter r of the discharge tube 21 was set to 10 mm.

[0080] The condensing optical system 27 is a cylindrical lens whose cross-sectional shape is a semicircle when cut by a plane perpendicular to the tube axis 21a of the discharge tube 21, and the diameter R of this cross-section is 10 mm, the same as the diameter r of the discharge tube 21.

[0081] A calorimeter was used as the sensor 30.

[0082] (Verification results) Figure 8 shows the heat distribution diagrams for each sample obtained in this verification experiment. Note that the heat distribution shown in Figure 8 is a relative distribution when the maximum value (θ=0°) in the heat distribution of Example 1 is set to 1.0.

[0083] First, as can be seen from Figure 8, the heat distribution in Examples 1 to 3 is confirmed to be extremely high near 0° compared to Comparative Examples 1 to 3. In other words, the heating lamp 20 can irradiate the object to be heated W1 with heating light Lx over a narrow area. That is, the heating lamp 20, the light source unit 10 equipped with the heating lamp 20, and the optical heating device 1 enable the irradiation of the object to be heated W1 with precise heating light Lx.

[0084] Here, the inventors noticed that in the distribution diagram of Figure 8, the values ​​are relatively small in the angular range where the angle θ is greater than ±83°. In other words, when the reflective film 28 is formed over half of the circumference of the discharge tube 21 (-90°≦θ≦90°), it can be confirmed that most of the heating light Lx is emitted within a range of ±83° around the tube axis 21a of the discharge tube 21.

[0085] Based on these characteristics, a condition can be derived for the heating lamp 20 such that almost all of the heating light Lx emitted from the discharge tube 21 is incident on the focusing optical system 27. This condition can be derived as shown in equation (1) below, by considering, based on the above results, that the distance between the discharge tube 21 and the focusing optical system 27 is x, and that almost all of the light emitted from the tube wall in the portion of the discharge tube 21 where the reflective film 28 is not formed is incident on the focusing optical system. (Rr) / 2≧(r / 2+x)tan83° (1)

[0086] Therefore, when the heating lamp 20 has a reflective film 28 formed over half of the entire circumference of the discharge tube 21 (-90°≦θ≦90°), it is preferable that the diameter R, diameter r, and separation distance x satisfy equation (1) above.

[0087] In this embodiment, the optical heating device 1 and light source unit 10 were described as having a configuration that includes multiple heating lamps 20, but the optical heating device 1 and light source unit 10 may also be configured to have only one heating lamp 20.

[0088] [Alternative Embodiment] Another embodiment will be described below.

[0089] <1> Figures 9 to 11 are schematic overall perspective views showing the base 24 in one embodiment of the heating lamp 20.

[0090] The base 24 may be formed with the first recess 24a and the second recess 24b separated, as shown in Figure 9. This configuration of the base 24 is suitable, for example, when it is desired to keep the light-emitting tube 21 and the light-gathering optical system 27 at a certain distance from each other.

[0091] As shown in Figure 10, the base 24 may have a first recess 24a and a second recess 24b formed such that when mounted on the light heating device 1 and the light source unit 10, the direction in which the light-emitting tube 21 and the focusing optical system 27 are arranged is inclined with respect to the Z direction. This configuration of the base 24 is suitable, for example, when it is desired to concentrate the heating light Lx emitted from the heating lamps 20 located at both ends in the Y direction of the light source unit 10 in Figure 2 and the heating light Lx emitted from the heating lamp 20 located at the central end, to positions as close as possible on the base 2.

[0092] As shown in Figure 2, when multiple heating lamps 20 are mounted on the optical heating device 1 or light source unit 10, the base 24 may be integrally configured in some or all of the optical heating device 1 or light source unit 10, as shown in Figure 11.

[0093] According to the above configuration, the bases 24 of the multiple heating lamps 20 are integrally formed, so that the spacing between each light-emitting tube 21 is maintained at a desired interval. Furthermore, it is no longer necessary to individually form the structure that supports the bases 24, so the space required for arranging the multiple heating lamps 20 in the optical heating device 1 and light source unit 10 can be reduced, resulting in a smaller overall device size. In addition, the optical heating device 1 and light source unit 10 allow for the attachment and detachment of multiple heating lamps 20 together, making manufacturing and maintenance work relatively easy.

[0094] <2> The configurations of the light heating device 1, light source unit 10, and heating lamp 20 described above are merely examples, and the present invention is not limited to the illustrated configurations. [Explanation of Symbols]

[0095] 1 : Optical heating device 2: Pedestal 2a : Post 10: Light source unit 11: Cabinet 12: Power supply section 20: Heating lamp 21: Discharge tube 21a: Tube shaft 21p: External wall surface 21q: Inner wall surface 22: Filament 22a: Supporter 23: Seal part 23a: Conductive material 24: Bass 24a: First recess 24b: Second recess 24c: Bottom 24d: Bottom 24h: First hole 24p: Second hole 24q: Third foramen 25: Power supply pin 26: Power line 27: Focusing optical system 27a: Optical axis 28: Reflective film 30: Sensor 31: Light receiving part Lx: Second light W1: Object to be heated

Claims

1. A discharge tube extending in the first direction, A filament extending in the first direction is housed within the discharge tube, A focusing optical system extending in the first direction, positioned near the light-emitting tube, which focuses at least a portion of the light emitted from the filament and exited the light-emitting tube, A reflective member that reflects light emitted from the filament and traveling toward the opposite side of the focusing optical system so that it travels toward the focusing optical system, In the first direction, a power supply pin is provided so as to protrude outward from the end of the discharge tube, A sealing portion that seals the light-emitting tube at the first end, with a conductive member sandwiched between the filament and the power supply pin for electrically connecting them, A heating lamp characterized by comprising a base having a first recess into which the end of the light-emitting tube is inserted in the first direction, a second recess into which the end of the light-gathering optical system is inserted in the first direction, a first hole provided at the bottom that restricts the movement of the end of the light-emitting tube in the first direction for inserting the power supply pin, and a second hole for inserting a power supply line connected to the power supply pin.

2. The heating lamp according to claim 1, characterized in that the second hole is formed to extend in a direction perpendicular to the first direction when viewed from the power supply pin.

3. The heating lamp according to claim 2, characterized in that the second hole is formed to extend toward the opposite side from the focusing optical system when viewed from the power supply pin.

4. The heating lamp according to claim 1, characterized in that the power supply pin and the power supply line are connected by welding.

5. The heating lamp according to claim 1, characterized in that the power supply pin and the power supply wire are connected by crimping.

6. The heating lamp according to claim 1, characterized in that the reflective member is a reflective film provided on the tube wall of the discharge tube.

7. The heating lamp according to claim 1, characterized in that the base comprises a plurality of the first recess, the second recess, the first hole, and the second hole, and is configured to support a plurality of the light-emitting tubes and a plurality of the light-gathering optical systems.

8. A light source unit characterized by comprising a plurality of heating lamps as described in any one of claims 1 to 7.

9. The light source unit according to claim 8, characterized in that the base is integrally formed in at least some of the plurality of heating lamps.

10. A light heating device characterized by comprising a plurality of heating lamps as described in any one of claims 1 to 7.

11. The optical heating device according to claim 10, characterized in that the base is integrally formed in at least some of the plurality of heating lamps.

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