JP2000057841A - Spot light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate a spot light source device stably over a long time by effectively cooling a light guide slot. SOLUTION: In this spot light source device, a fresh air inlet 55 is provided at a fiber slot 50 in which a fiber 5 for guiding light to the outside is mounted, and thereby the fiber slot 50 is directly cooled by fresh air passing through the fresh air inlet 55 and the fiber 5 is also cooled. Thus, the spot light source device reducing the rate of deterioration of the above members is achieved. Light cannot pass through the fresh air inlet 55 and a light blocking member is installed outside it to prevent the leaking of light from the fresh air inlet 55. The light blocking member serves also as a heat-radiating fin, further enhancing cooling efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spot light source device for irradiating light.

[0002]

2. Description of the Related Art Conventionally, in a spot light source device, light emitted from a discharge tube is reflected and condensed by a reflection mirror such as an elliptical condensing mirror, guided to an exit port, and emitted from the exit port to the outside. You.

As means for emitting and guiding light from the spot light source device to the outside, for example, a light guide means (light guide) such as a fiber is used (for example, Japanese Patent Laid-Open No. 9-28)
1361). That is, a light guide insertion port is provided at an emission port of the spot light source device, and a light guide is connected to the light guide insertion port to emit light.

[0004]

In such an apparatus, light irradiation irradiates a light guide such as a fiber and a light guide insertion port, thereby causing deterioration and breakage of the light guide. Becomes Such heating is particularly problematic when, for example, a liquid fiber is used as a light guide, which is susceptible to heat, and is likely to be damaged or reduced in light transmittance by heating.

In order to cope with such a problem, when a heat radiating fin is installed in the light guide insertion port, it is necessary to increase the size of the heat radiating fin in order to sufficiently cool the light fin. Can not.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and provides a spot light source device capable of effectively cooling a light guide insertion port and operating stably for a long time. With the goal.

[0007]

In order to achieve the above object, a spot light source device according to the present invention comprises a discharge tube for emitting light, a reflection mirror for reflecting light emitted from the discharge tube, and a discharge tube. In a spot light source device having a tube and a housing in which a reflection mirror is housed, and an emission port provided on a front surface of the housing for emitting light from the reflection mirror, light is emitted to an emission port. A light guide insertion port for attaching a light guide for guiding the light to the outside, and an outside air intake hole for introducing outside air is provided in the light guide insertion port.

As described above, by providing the outside air intake hole at the light guide insertion port for attaching the light guide such as a fiber, the light guide insertion can be performed directly and most effectively by the outside air passing through the outside air intake hole. The mouth can be cooled. According to such a configuration, since the light guide insertion port does not become large, there is no problem that the apparatus cannot be downsized. In addition, the outside air that has cooled the light guide insertion port through the outside air intake hole as described above is further introduced into the device, and is also used for cooling each part in the spot light source device.

The outside air intake hole has a bent portion to prevent light leakage.

[0010] Further, a shielding member for preventing light leakage may be further provided near the outside end of the outside air intake hole of the housing.

[0011] By forming the outside air intake hole in a shape having a bent portion so that light cannot travel straight and pass therethrough, light leakage from the outside air intake hole to the outside can be suppressed. Further, by providing the shielding member outside the outside air intake hole, light leakage can be reliably prevented. In addition, the shielding member provided on the outside in this way also has a function of a radiation fin, so that the cooling efficiency of the light guide insertion port can be further increased.

Further, by providing an exhaust port at a predetermined position of the housing for exhausting the air flow inside the housing, the intake of the outside air from the outside air intake hole is promoted, and the cooling is more efficiently performed. It can be carried out.

[0013] Further, a light guide connected to the emission port and guiding the emitted light may be further provided. For example, by connecting a light guide having a form and performance according to the application such as a fiber, light can be efficiently emitted and used. In this case, the light guide is cooled by the fixed light guide outlet, since it is cooled by the outside air intake,
The deterioration is suppressed.

As the light guide, for example, a light guide in which a liquid having a light guiding property is filled in a cylindrical body may be used. As a light guide using such a liquid, there is a liquid fiber which is inexpensive and has a large numerical aperture (NA).

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a UV spot light source device according to the present invention will be described below in detail with reference to the drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description. Also, the dimensional ratios in the drawings do not always match those described. In addition, about each surface of the housing which comprises the outer surface of a spot light source device, a bottom surface and an upper surface,
Regarding the other four surfaces, the surface provided with the emission port facing the opening of the discharge tube and the reflection mirror is the front surface, the opposite side is the rear surface, the left side is the left side with respect to the front side, the right side is the right side. I do.

FIG. 1 is a horizontal end view of a UV spot light source device according to an embodiment of the present invention in a plane including the center of a discharge tube 20. 2 and 3 are perspective views showing a schematic configuration of the UV spot light source device shown in FIG.
The housing 1 in the present embodiment is a housing base 1
1 and a housing cover 12, and FIG. 2 shows a schematic configuration of the inside of the apparatus with the housing base 11 and the housing cover 12 cut away. Further, an inner box cover 33 and a light source cover 35 described later are not shown here. Also, in FIG. 3, the fracture of the housing base 11 and the housing cover 12 is the same as in FIG. 2, but the inner box cover 33 and the light source cover 35 are illustrated to clearly indicate the division of each area inside the housing 1. are doing.

Here, each surface of the housing 1 is
1a front, 1b rear, 1c left side, 1 right side
d, the bottom surface is 1e, the top surface is 1f, and the front surface 1a is provided with an emission port 13 for emitting light to a predetermined position. For each of these surfaces, the housing base 11 forms the front surface 1a, the rear surface 1b, and the bottom surface 1e of the housing 1, and the housing cover 12 forms the left side surface 1c, the right side surface 1d, and the top surface 1f of the housing 1.

As shown in FIG. 1, inside the housing 1, a driving area A in which a driving device such as a power supply or a circuit is stored, and an output area in which a shutter for controlling emission of light to the outside are installed. B, a light source region C in which a discharge tube and a reflecting mirror are stored, a ventilation region D for controlling a path of an air flow, and a rear region E having an exhaust port for exhausting the air flow. Have been.

The driving area A is formed on the right side of the apparatus by the partition plate 31. The partition plate 31 is constituted by a left side surface and a rear surface, and the height thereof is set to the bottom surface 1e of the housing 1.
From the upper surface 1f, that is, the height of the housing 1. Further, the rear surface of the partition plate 31 is connected to the right side surface 1d of the housing 1, so that the driving area A is divided into the left side surface and the rear surface by the partition plate 31, and the front surface, the right side surface, the bottom surface, and the upper surface of each surface of the housing 1. The driving area A is partially open at the front of the left side face and communicates with a ventilation area D described later.

In the driving area A, a driving device for driving and controlling each part of the UV spot light source device is provided. In the drawing, the driving device 15 is schematically and simply shown, but the driving device 15 may be constituted by a plurality of devices and installed. For example, this drive device is configured to include a power supply for supplying a current to each unit, a circuit for driving each unit, a computer for controlling them, and the like.
The driving device 15 is, for example, a front surface 1 a of the housing 1.
May be connected to a panel or the like installed at a predetermined position facing the drive area A, and operated by an operator. It should be noted that the connection between the driving device 15 and each part of the UV spot light source device is not shown in the drawing.

The output area B includes the inner box 32 and the inner box cover 3.
3 is formed on the left front side of the apparatus. Inner box 32
Is composed of an inner box front part 32a and an inner box rear part 32c. An emission opening 32 for emitting light is provided at a predetermined position facing the emission opening 13 on the front surface of the inner box front part 32a.
b is formed. In addition, an opening 32d is provided on the rear surface of the inner box rear portion 32c to allow the light from the discharge tube 20 to enter and guide the light. The height of the inner box 32 composed of the inner box front part 32a and the inner box rear part 32c is set lower than the height of the housing 1, and the inner box cover 33 is installed on the upper surface thereof. As a result, the output area B has a front surface,
The rear, left and right sides are divided by the inner box 32, the bottom is divided by the bottom 1 e of the housing 1, and the top is divided by the inner box cover 33.

In FIG. 2, an inner box front portion 32 of the inner box 32 is shown.
a and the rear part 32c of the inner box are partially broken away to show the inside thereof. In this output area B, a shutter 4 is provided inside the inner box front part 32a. The shutter 4 includes a shutter plate 41 and a shutter driving unit 42, and is fixed to the shutter fixing unit 33a and installed. Further, the position where the shutter plate 41 is ON is confirmed by detecting the protrusion 41a provided on the shutter plate 41 by the position sensor 43. This position sensor 4
Reference numeral 3 is fixed to the position sensor fixing portion 33b and installed.

The shutter fixing portion 33a and the position sensor fixing portion 33b to which the shutter 4 and the position sensor 43 are fixed are integrally fixed to the inner box cover 33,
It is installed so that it can be easily attached and detached. Note that FIG.
Does not show the inner box cover 33 as described above, and therefore they are shown in a floating state in the figure. In FIG. 2, the shutter plate 4
The position 1 indicates a state in which light emission is ON. The state where the light emission is OFF, that is, the shutter plate 41
Is on the optical axis of the emitted light (hereinafter simply referred to as the optical axis), and the state where the emission of light is blocked is indicated by a dotted line. FIG. 1 does not show the shutter 4 because each part of the shutter 4 is not on the optical axis when the light emission is ON.

In the present embodiment, a fiber 5 is connected as a light guide to the opening formed by the light-emitting opening 32b and the light-emitting opening 13. An entrance 50 is provided. A filter fixing plate 32e (not shown in FIG. 2) is provided at a boundary between the inner box front part 32a and the inner box rear part 32c. Filter fixing plate 32e
An opening is provided at a predetermined position between the opening 32d on the rear surface of the inner box 32 and the emission opening 32b on the front surface of the inner box 32, and the filter fixing plate 32e is provided on the side of the inner box rear 32c, The ultraviolet light transmitting filter 14 is provided so as to cover the opening.
(Not shown in FIG. 2).

The light source area C is formed on the left side of the apparatus by a light source dividing plate 34 and a light source cover 35. The light source partition plate 34 is constituted by a right side surface and a rear surface, and the height thereof is set lower than the height of the housing 1. The right side surface of the light source partitioning plate 34 is the inner box rear 32 of the inner box 32.
c is connected to the rear surface. The light source cover 35 includes a left side surface and an upper surface, and is connected to the light source partition plate 34 and installed. Thus, the light source region C is divided into a right side and a rear side by the light source dividing plate 34, a left side and the upper side by the light source cover 35, a front side by the inner box rear portion 32c of the inner box 32, and a bottom surface by the bottom surface 1e of the housing 1. It is composed.

In the light source area C, a lamp unit 2 having a discharge tube 20 and a reflection mirror 21 is provided.
The lamp unit 2 is fixed facing the opening 32d of the inner box rear part 32c by the positioning ring 22 of the lamp unit 2 and the lamp holding part 28 installed on the rear surface of the inner box rear part 32c. Each electrode of the discharge tube 20 is connected to an insulating substrate 23, from which connection to a power supply (not shown) is made.

The light source cover 35 is connected and fixed to the upper surface 1f of the housing cover 12 by a light source cover fixing portion 35a. Behind this light source cover 35,
An interlock release portion 35c protruding downward is provided. Thus, when the housing cover 12 is correctly mounted, the interlock release portion 35
c, the interlock release switch 16 installed on the rear surface 1b side of the housing 1 of the interlock control unit 16 fixed to the surface on the ventilation area D side of the light source partition plate 34
a (shown in FIG. 1) is depressed to release the interlock, and the apparatus can be operated.

In this embodiment, a lamp unit 2 which can be easily attached and detached is used. The lamp unit 2 is mounted on a lamp fixing portion 29 provided on the left side surface of the inner box rear portion 32c. Is fixed by the lock portion 29a. Again, the light source cover 35 has
Corresponding to the pedestal lamp fixing engagement portion 29b provided on the lamp fixing portion 29, the cover side lamp fixing engages with the pedestal lamp fixing engagement portion 29b when the lamp unit 2 is correctly fixed. An engagement portion 35d is provided.

The ventilation region D is formed by being sandwiched between the left side surface of the partition plate 31 forming the drive region A, the inner box 32 forming the output region B and the light source region C, and the right side surface of the light source partition plate 34. ing. The ventilation area D is provided for the purpose of controlling the cooling path of each part by the air flow. In the present embodiment, the ventilation area D is further divided into two regions before and after by the ventilation control plate 36. Constitutes an air flow merging region F. The upper surface of the ventilation area D is covered by the light source cover 35 as in the light source area C. In addition, on the uppermost front part of the light source cover 35,
A ventilation control plate 35b for restricting ventilation is provided from above the light source region C to above the ventilation region D.

The rear area E includes a driving area A and a light source area C.
Are formed between the rear surface of the partition plate 31 and the rear surface of the light source partition plate 34 and the rear surface 1b of the housing 1.

In such a configuration, the light radiated from the discharge tube 20 of the lamp unit 2 installed in the light source area C is reflected by the reflection mirror 21 and is output from the output area B.
ON / O of light emission by the shutter 4
When the FF is controlled and the shutter 4 is in the ON state, light is incident on the fiber 5 connected to the fiber insertion port 50 through the emission opening 32b and the emission port 13,
Output to the outside.

The fiber insertion port 50 according to the present embodiment will be described. FIG. 4 is an enlarged sectional view showing the configuration of the fiber insertion port 50. FIG. 5 shows the fiber insertion port 5.
FIG. 2 is a perspective view showing a state where the device is broken about 0 and developed. In addition,
In FIG. 5, as for the front surface 1a of the housing 1 and the front part 32a of the inner box, only a portion around the fiber insertion port 50 is cut away.

The fiber insertion port 50 is formed in a cylindrical shape with the optical axis as a center.
Outside air intake member 52, fixing member 53, and light shielding member 54
It is composed of The outer diameter of the fiber fixing member 51 is small in order to mount the fiber fixing member 51 to the apparatus main body. A cylindrical fiber insertion portion 51a having a predetermined inner diameter is provided inside, and a fiber 5 (not shown in FIGS. 4 and 5) serving as a light guide is inserted into the fiber insertion portion 51a. Inserted,
Fixed.

Note that, for example, a liquid fiber may be used as the fiber 5. The tip of the liquid fiber
The Teflon material is constituted by a quartz rod, and the periphery thereof is fixed by a Teflon material. However, when light is applied to the Teflon material at the periphery of the fiber, the Teflon material may be deteriorated or damaged by heat. In order to prevent such damage, a light-shielding portion 51b is provided at the rear end portion of the fiber insertion portion 51a where light is incident so as to cover the periphery of the fiber insertion portion 51a, and light is emitted only to the quartz rod. It is configured to be incident.

The outside air intake member 52 and the fixing member 53 are used to fix the fiber insertion port 50 and to take in outside air for cooling.
It has the following two functions. That is, the fiber insertion port 50
The outside air intake member 52 and the fiber fixing member 51 are fixed together with the exit port 1 on the front surface 1a of the housing 1.
3, the fixing member 53 is installed from outside the emission opening 32b of the inner box front part 32a, and is installed from the inside of the emission opening 13 and the emission opening 32b. It is fixed as shown in FIG. But here,
A specific fixing method using screws or the like is not shown. The outside air intake member 52 and the fixing member 53 are provided with cylindrical openings 52a and 53a having inner diameters corresponding to the outer diameter of the rear part of the fiber fixing member 51, respectively. The rear part is installed and fixed so as to penetrate them.

Regarding the outside air intake, the outside air intake member 52 has an outside air introduction part 52b and a ventilation part 52c.
The fixing member 53 is provided with a ventilation portion 53b, which forms an outside air intake hole 55 of the fiber insertion port 50. The fiber inlet 50 is provided with
It is attached so as to be connected to a vent 32g provided at a predetermined position around the emission opening 32b of the inner box front part 32a, and thereby, by the outside air introduced from the outside air intake hole 55, When the air flow passes through the outside air intake hole 55, the fiber insertion port 50 and the fiber 5 are cooled, and each part in the inner box 32 is cooled by the air flow introduced into the inner box 32. A fan 63 is provided at a predetermined position on the rear surface 1b of the housing 1. The fan 63 exhausts the air flow inside the apparatus, so that sufficient outside air is taken in from the outside air intake hole 55. Is achieved.

The ventilation section 52c has a cylindrical shape parallel to the optical axis at a position around the opening 52a of the outside air intake member 52 and facing the ventilation port 32g of the inner box front section 32a. In this embodiment, three are formed. On the other hand, the outside air introduction part 52b and the ventilation part 53b
c and the outside air intake member 5
2 and the fixing member 53 are formed in a groove shape in a radial direction, that is, a direction perpendicular to the optical axis. Further, the outside air introduction unit 5
2b, a light shielding member 5 formed in a ring shape having a radius substantially equal to the outer diameter of the front portion of the fiber fixing member 51.
4 is fixed to the fiber fixing member 51 so that the outside air introduction part 52b faces and covers an area through which light can pass.

FIG. 4 shows the flow of the outside air introduced into the outside air intake hole 55 of the fiber insertion port 50 having the above-described configuration. By using such a fiber insertion port 50, the fiber insertion port 50, the fiber 5,
In addition, outside air is introduced for cooling the various parts inside the inner box 32, and the shape and configuration of the outside air intake hole 55, which is a path of the outside air intake hole, prevents light leakage of ultraviolet light to the outside. 55 can be realized. Further, the light shielding member 54 also has a function of a radiation fin due to its shape, so that the efficiency of cooling the fiber insertion port 50 can be further increased.

Fiber inlet 50 and its outside air intake hole 5
5 is not limited to the above-described embodiment, and it is possible to use outside air intake holes of various shapes and paths in which light leakage is prevented. Further, the fiber insertion port may be formed integrally.

The path of the air flow used for cooling the inside of the apparatus is controlled by external air intakes, vents, and the like provided at each part. The arrangement of these vents and the like is shown in FIG. 1 and not shown in FIG. 2 and FIG.

The air flow path of the entire apparatus is as follows. That is, the right side surface 1d of the housing 1
The first air flow introduced from the first outside air intake 61 cools the respective components such as the driving device 15 installed in the driving region A, and from the open portion in front to the air flow merging region F. Inflow. The second airflow introduced from the second outside air intake 62 on the left side surface 1 c of the housing 1 is
a, which is introduced into the inner box 32 through the light shielding vent 64, cools the respective parts such as the shutter 4 installed therein, passes through the vent 65 of the filter fixing plate 32e, and passes through the rear part 3 of the inner box.
The air flows into the air flow merging region F from the ventilation port 66 of 2c. The first air flow and the second air flow that have flowed into the air flow merging region F, and the outside air intake hole 55 of the fiber insertion port 50 described above.
From the air flow merge to form a third air flow. The third airflow is introduced into the light source region C from the light shielding vent 67 of the light source partition plate 34 and cools each part of the lamp unit 2 and the like installed therein, and the light source partition plate 34 and the light source cover 35 are cooled. Flows into the rear region E from the ventilation portion 68 between
Finally, the air is exhausted from the fan 63 to the outside.

The spot light source device according to the present invention is not limited to the UV spot light source device as described above, but can be applied to spot light source devices of various forms and uses, for example, a visible light spot light source device. It is.

[0043]

As described in detail, the spot light source device according to the present invention has the following effects. That is, by providing an outside air intake hole at a light guide insertion port to which a light guide such as a fiber for guiding light to the outside of the light is attached, light is directly written by the outside air passing through the outside air intake hole. Guide outlet is cooled,
Further, when the light guide is connected to the light guide insertion port by that, the light guide is also cooled, so that the light guide insertion port and the like are effectively cooled and their deterioration is suppressed. Is realized.

At this time, light is prevented from passing through the outside air intake hole, and a light shielding member is provided outside the outside air intake hole, whereby light leakage from the outside air intake hole can be prevented. . At this time, the attached shielding member also plays a role of a radiation fin, so that the cooling efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a horizontal end view showing an embodiment of a UV spot light source device according to the present invention.

FIG. 2 is a perspective view of the UV spot light source device shown in FIG. 1 with an inner box cover and a light source cover removed.

FIG. 3 is a perspective view of the UV spot light source device shown in FIG. 1 with an inner box cover and a light source cover attached.

FIG. 4 is an enlarged sectional view showing a configuration of a fiber insertion port.

FIG. 5 is a perspective view showing the fiber insertion port in a broken and unfolded state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing, 1a ... Front surface, 1b ... Rear surface, 1c ... Left side surface, 1d ... Right side surface, 1e ... Bottom surface, 1f ... Top surface, 11 ... Housing base part, 12 ... Housing cover, 13 ... Outgoing opening, 14 ... Ultraviolet light Transmission filter, 15 ... Drive device, 16
... interlock control section, 16a ... interlock release switch, 2 ... lamp unit, 20 ... discharge tube, 21 ...
Reflection mirror, 22 positioning ring, 23 insulating substrate,
28: lamp holding part, 29: lamp fixing part, 29a: locking part, 29b: base side lamp fixing engaging part, 31: partition plate, 32: inner box, 32a: inner box front part, 32b: emission opening part , 32c ... rear part of the inner box, 32d ... opening, 32e ... filter fixing plate, 32g ... vent, 33 ... inner box cover, 33
a: shutter fixing portion, 33b: position sensor fixing portion, 3
Reference numeral 4: light source dividing plate, 35: light source cover, 35a: light source cover fixing portion, 35b: ventilation control plate, 35c: interlock release portion, 35d: cover side lamp fixing engaging portion, 36:
Ventilation control plate, 4 ... Shutter, 41 ... Shutter plate, 4
1a: Projection, 42: Shutter drive, 43: Position sensor, 5: Fiber, 50: Fiber insertion port, 51: Fiber fixing member, 51a: Fiber insertion part, 51b: Light shielding part, 52: Outside air intake member , 52a ... opening, 52b ...
Outside air introduction part, 52c ... ventilation part, 53 ... fixing member, 53a
... opening, 53b ... vent, 54 ... light shielding member, 55 ...
Outside air intake hole, 61 ... first outside air intake, 62 ... second outside air intake, 63 ... fan, 64 ... light shielding vent, 65,
66 ... vent, 67 ... light shielding vent, 68 ... vent.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kazuo Yoshida, 1126 Nomachi, Ichinomachi, Hamamatsu City, Shizuoka Prefecture Inside (72) Inventor Tetsuya Kokishima 1126, 1126 Nomachi, Ichinomachi, Hamamatsu City, Shizuoka Prefecture F term in reference (reference) 2H050 AC63 AC86 3K014 LA01 LB03 3K042 AA01 AB02 AC01 CC06

Claims (6)

[Claims] A discharge tube that emits light; a reflection mirror that reflects light emitted from the discharge tube; a housing in which the discharge tube and the reflection mirror are stored; and a reflection mirror. A light guide for attaching a light guide that guides emitted light to the light emission port. An outlet is provided, and the light guide insertion port is provided with an outside air intake hole for introducing outside air. 2. The spot light source device according to claim 1, wherein the outside air intake hole has a bent portion to prevent light leakage. 3. The spot light source device according to claim 1, further comprising a shielding member for preventing light leakage near an end of the outside air intake hole outside the housing. 4. The spot light source device according to claim 1, wherein an exhaust port for exhausting an air flow inside the housing is provided at a predetermined position of the housing. 5. The spot light source device according to claim 1, further comprising a light guide connected to said light exit port to guide emitted light. 6. The spot light source device according to claim 5, wherein the light guide is a light guide in which a liquid having a light guiding property is filled in a cylindrical body.