JP2000057803A - Spot light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain light leakage degradation of parts caused by heating by effectively shielding extra light. SOLUTION: This device is provided with a tubular shielding member 40 having a light introduction part at an outgoing aperture side of a shielding board 41 as well as the shielding board 41 having an opening to thereby restrain not only a passing position of light at the shielding board 41 but also a direction and an angle thereof so as to perform an effective shielding for the purpose of shielding extra light other than light which is reflected by a reflection mirror 21 and introduced to the outgoing hole among light that is radiated from a discharge tube 2. The tubular shielding member 40 has a function of a radiating fin too, and is provided with a vent hole at the side surface of a housing facing to the tubular shielding member 40 to thereby perform an effective cooling.

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 reflecting mirror such as an elliptical condensing mirror, guided to an output port, and connected to an output port. The light is emitted to the outside by light guide means (light guide).

At this time, in order to suppress the influence of light or the like radiated directly to other parts of the apparatus without being taken into the reflection mirror from the discharge tube, the light emitted from the discharge tube and the reflection mirror and between the discharge port is output. A shielding plate or a shielding member (aperture) having an opening with a predetermined area and shape on the optical axis of the light can be provided. As such a spot light source device, for example, there is a device disclosed in JP-A-9-281361.

[0004]

The light which is not reflected by the reflecting mirror and is not correctly guided is reflected and scattered at various parts and components inside the apparatus, and is transmitted from a ventilation hole for cooling inside the apparatus. This causes light leakage to the outside, and also causes deterioration or deterioration of components due to heating or the like caused by light irradiation.

When a shielding plate having an opening is provided between the discharge tube and the reflecting mirror and the emission port, a certain shielding effect can be obtained, but the shielding plate is directly provided without using the reflecting mirror.
Or light that has been reflected or scattered from other parts and passed through the opening is not uniform in direction, so a single shielding plate cannot provide a sufficient shielding effect,
It is necessary to separately provide a shielding / shielding means for preventing light leakage. In addition, around the emission port, and further to the shutter and its drive system when a shutter is further provided,
There are problems such as heating by light irradiation or the like and deterioration of parts due to the heating.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and effectively blocks light that is not emitted, thereby suppressing light leakage from each part, heating, and deterioration of parts due to heating. It is an object to provide a spot light source device.

[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, a discharge tube and a reflection mirror are provided. ,
Between the front surface of the housing, a light source region on the rear surface side of the housing including the discharge tube and the reflection mirror, and an output region on the front side inside the housing, and a shielding plate having an opening through which light passes, And a cylindrical shielding member having a light guide that allows light to pass therethrough, which is attached to the surface of the shielding plate on the output area side so as to protrude toward the emission port.

As described above, when light having no directionality is shielded, only the light passing position when passing through the shield plate can be limited depending on the opening of the shield plate. By providing a cylindrical shielding member on the surface on the region side, the direction and angle of light can also be restricted, and effective shielding can be performed. As a result, light leakage from each part is significantly reduced, and heating of the periphery of the light exit port and other members by light irradiation or the like and deterioration of components due thereto are suppressed.

[0009] Further, an air vent is provided at a predetermined portion on at least one side surface of the housing facing the output area.

When the light is shielded by the shielding plate and the cylindrical shielding member, the shielding plate and the cylindrical shielding member are heated by the light. By providing the air vents, the shielding plate and the cylindrical shielding member can be effectively cooled. In this case, in particular, since the cylindrical shielding member protrudes from the shielding plate to the output area, it also has a function of a heat radiation fin, thereby increasing the cooling efficiency.

A cylindrical shielding member in the output area;
By providing a shutter for switching ON / OFF of light emission between the light emitting port and the emission port, ON / OFF of light emission is performed by the shutter without turning ON / OFF of the discharge tube as a light source. OFF can be performed, and light emission control becomes easy. Further, in the output area, between the shutter and the emission port, as a configuration further provided with a shielding cover having an opening that allows light to pass, which is installed so as to cover the cylindrical shielding member and the shutter. The effect may be enhanced.

When a shutter is used, a support member for fixing and installing the shutter may be further provided in the output area. Since the shutter is not fixed to the shielding plate or the like but is fixed and installed on a separately provided support member, heating of the shutter can be further suppressed, and deterioration of the shutter components can be prevented.

[0013] The cylindrical shielding member may be characterized in that the shape of the light guide is tapered toward the front surface of the housing. With such a tapered shape, the direction and angle of light can be further effectively restricted, and the shielding effect can be enhanced.

[0014] A light guide connected to the light exit 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.

[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 block diagram showing a first embodiment of the present invention.
FIG. 2 is a top view illustrating a schematic configuration of a V spot light source device. FIG. 2 is a sectional view of the UV spot light source device shown in FIG.
It is arrow sectional drawing. Housing 1 in the present embodiment
Is composed of a housing base 11 and a housing cover 12, but in FIGS.
Is not shown. An inner box 18 described later is not shown here. Here, regarding each surface of the housing 1, the front surface is 1a, the rear surface is 1b, the left side surface is 1c,
The right side is 1d, the bottom is 1e, and the top is 1f. 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.

The inside of the housing 1 is divided into left and right regions by a partition plate 14, and the left region is a light irradiation system region where an optical system such as a discharge tube is installed, while the right region is. In the drive system area A, a drive device 13 (not specifically shown) for driving and controlling a discharge tube and the like is provided. The drive device 13 is connected to, for example, a panel installed at a predetermined position on the front surface 1a of the housing 1,
It may be configured to be operated by an operator.

The light irradiation system area is further divided by a shielding plate 41 into a rear light source area B and a front output area C. The shielding plate 41 is provided with an opening 41a, so that light other than light passing through the opening 41a does not enter the output region C from the light source region B.
In the light source region B, a discharge tube 2 that emits ultraviolet light is installed so as to be located inside a reflection mirror 21 which is an elliptical condensing mirror with an opening directed toward the front surface 1a of the housing 1. The reflection mirror 21 includes a reflection mirror fixing plate 21a.
Is fixed and installed.

At a predetermined position on the front surface 1a of the housing 1 facing the discharge tube 2 and the opening of the reflection mirror 21, there is provided an emission port 22, which is an opening for emitting ultraviolet light from the reflection mirror 21, On the outside, the fiber insertion port 23
Is connected. In such a configuration, the ultraviolet light emitted from the discharge tube 2 is reflected by the inner surface of the reflection mirror 21 toward the opening, passes through the opening 41 a of the shielding plate 41, and enters the output region C. In the present embodiment, the ultraviolet light that has reached the emission port 22 is emitted outside by a fiber 25 serving as a light guide connected to the fiber insertion port 23.

The surface of the shielding plate 41 on the side of the light source region B is covered with an ultraviolet transmitting filter 24 so as to cover the opening 41a.
Is installed.

In the output area C, a cylindrical shielding member 40 is fixedly installed on a shielding plate 41 so as to protrude toward the front surface 1a of the housing 1. The opening 41a of the shielding plate 41 is formed as a circular opening 41a around the optical axis (hereinafter, simply referred to as the optical axis) of the emitted ultraviolet light. Also, the bottom surface 1e of the housing 1 of the shielding plate 41
The side is formed in an L-shape, and is fixed to the bottom surface 1e of the housing 1 by a bottom portion 41b in contact with the bottom surface 1e.

The cylindrical shielding member 4 fixed to the shielding plate 41
0 has a light guide portion 40a inside, and the cross section in the optical axis direction of the light guide portion 40a has a truncated conical shape with a small opening and a tapered shape toward the emission port 22 side as shown in FIG. In the output area C between the shielding plate 41 and the emission port 22, the center of the truncated cone is aligned with the optical axis and connected to the shielding plate 41. Thus, the opening 41 a of the shielding plate 41 and the light guide 4 of the cylindrical shielding member 40 are provided.
0a, the ultraviolet light is incident on the output region C only when passing through, so that the ultraviolet light incident on the output region C is limited only in the position where the ultraviolet light passes through the shielding plate 41. In addition, with respect to the ultraviolet light passing through the opening 41a of the shielding plate 41, the incident direction and angle of the ultraviolet light can be limited by the light guide 40a of the cylindrical shielding member 40. It is possible to perform the shielding effectively.

In the present embodiment, the cylindrical shielding member 4
ON / OFF of ultraviolet light emission between the light emission port 22 and the emission port 22
The shutter 5 having a shutter plate 50 and a shutter driving unit 51 for controlling the shutter speed is further provided. The shutter driving unit 51 including the stepping motor, to which the shutter plate 50 is connected,
A shutter plate 50, which is fixed to the letter-shaped bottom portion 41b and has a shape composed of a part of a cylinder, is connected and driven around an axis perpendicular to the optical axis as a rotation axis. 1 and 2, the position of the shutter plate 50 indicates a state in which the ultraviolet light emission is ON, but the shutter driving unit 51 includes the shutter plate 5.
0 is configured to be rotatable in both directions,
When turning off the ultraviolet light emission, the shutter plate 50 is driven to a position so as to cover the emission port 22 side of the cylindrical shielding member 40 (indicated by a dotted line in FIG. 1), thereby turning ON / OFF. OFF can be switched. If you also want to adjust the intensity of the emitted ultraviolet light,
Between the shutter 5 and the emission port 22, an intensity adjusting means (aperture mechanism) may be further provided.

FIGS. 3, 4 and 5 show perspective views of the UV spot light source device according to the present embodiment. FIG. 3 shows the inside of the UV spot light source device with the housing cover 12 and the inner box 18 removed. FIG. 4 is a perspective view showing a schematic configuration, FIG. 4 is a perspective view showing a schematic configuration inside the UV spot light source device with the inner box 18 mounted, and FIG.
FIG. 4 is a perspective view showing a schematic configuration of an outer surface of the UV spot light source device in a state where the device is also mounted. Note that, in these drawings, a fixing member such as a column connected behind the reflection mirror fixing plate 21a, a method of connecting the discharge tube 2 to the driving device 13, and the like are not shown.

The inner box 18 for shielding extra light radiated from the discharge tube 2 and not reflected to the output area C but causing reflection, scattering, etc. in each part of the light source area B is provided with a rear surface 18b.
(Not shown), having a left side surface 18c and a top surface 18f, the other three surfaces being constituted by a shielding plate 41 on the front surface, a partition plate 14 on the right side, and a bottom surface 1e of the housing 1 on the bottom surface. Thus, shielding is realized as shown in FIG.

At a predetermined position facing the output area C on the left side surface 1c of the housing cover 12, a ventilation port 16 is provided as shown in FIG. A fan 15 is provided at a predetermined portion of the rear surface 1b of the housing base 11 facing the drive system region A. As a result, the outside air introduced from the ventilation port 16 is blocked by the shielding plate 41 and the cylindrical shielding member 4.
0, the components such as the shutter plate 50 of the shutter 5 and the shutter driving unit 51 are cooled, and flow into the driving system area A through the upper part of the partition plate 14 or the left side and the upper part of the inner box 18 and the fan 15 It is exhausted from.

In the conventional spot light source device, when such a ventilation port is provided, the light leakage is a serious problem. However, the provision of the cylindrical shielding member 40 causes the light leakage as shown in FIG. Even when the ventilation opening 16 is provided on the side surface of the housing, the light is shielded so as not to cause light leakage. Further, the cylindrical shielding member 40 protruding into the output area C itself also functions as a radiation fin,
The shielding plate 41 and the cylindrical shielding member 40 heated by shielding the light are effectively cooled.

In the present embodiment, the housing 1 and the inner box 18 are installed so that a space is provided between the left side 1c of the housing 1 and the left side 18c of the inner box 18. In this case, in order to cool the inner box 18, a ventilation port 17 may be further provided at a predetermined portion facing the light source region B on the left side surface 1c of the housing cover 12, as shown in FIG.

FIG. 6 is a perspective view of the UV spot light source device according to the second embodiment of the present invention with the housing cover 12 and the inner box 18 removed, and FIG.
With respect to the V spot light source device, a shielding cover 42 is further provided between the shutter plate 50 and the emission port 22 so as to cover the cylindrical shielding member 40 and the shutter plate 50. The shielding cover 42 is formed in a semi-cylindrical shape such that the shutter plate 50 is driven along its inner wall, and a predetermined position is set at a position facing the light exit portion 22 side of the light guide portion 40 a of the cylindrical shielding member 40. Is formed with an opening 42a having a size of By providing such a shielding cover 42, light leakage from a gap between the cylindrical shielding member 40 and the shutter plate 50 and the like can be prevented, and the shielding effect can be further enhanced.

FIG. 7 is a perspective view of the UV spot light source device according to the third embodiment of the present invention with the housing cover 12 and the inner box 18 removed, and FIG.
A shutter plate 6 having a form different from that of the V spot light source device
A shutter 6 having a shutter drive unit 61 and a shutter driving unit 61 is used, and a support member 62 for fixing the shutter 6 is further provided. In the present embodiment, the support member 62 is formed in an L-shape, and is fixed to the bottom surface 1e of the housing 1 by a bottom portion 62b contacting the bottom surface.
Further, the support member 62 is provided with an opening 62a that includes the cylindrical shielding member 40 inside as shown in FIG.

A shutter driving unit 61 including a rotary solenoid, to which a shutter plate 60 is connected, is fixed to the support member 62. The shutter plate 60 is connected and driven around a rotation axis parallel to the optical axis. Is done. In addition,
In FIG. 7, the position of the shutter plate 60 indicates a state in which ultraviolet light emission is ON.

The shielding plate 41 is formed in a plate shape having no L-shaped bottom portion 41b, and is provided on four sides with respect to a supporting member 62 fixed to the bottom surface 1e of the housing 1.
c. In such a configuration, the support member 62 to which the shutter 6 is fixed is not directly irradiated with light from the discharge tube 2 and the effect of heating is small. Heating to the shutter plate 60 and the shutter driving unit 61 is suppressed as compared with the case. As for the conduction of heat from the shielding plate 41, the ventilation port 1 is provided between the shielding plate 41 and the support member 62.
The cooling is performed by the flow of the outside air introduced from 6, which is suppressed. As a result, it is possible to prevent the shutter 6, especially the shutter driving unit 61 from deteriorating.

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

[0034]

As described in detail, the spot light source device according to the present invention has the following effects. That is, in order to shield the light from the discharge tube that is not correctly guided to the emission port, in addition to the shielding plate, by installing a cylindrical shielding member on the emission port side of the shielding plate, light passes through the shielding plate. Not only the position but also the direction and the angle can be restricted, and the shielding can be performed effectively. As a result, it is possible to realize a spot light source device that is highly reliable and can operate stably for a long period of time by suppressing light leakage from each part, heating, and deterioration of components due to the leakage.

Further, such a cylindrical shielding member also has a function of a radiation fin, and by providing ventilation holes on the side surface of the housing facing the output area, heat can be effectively radiated. .

[Brief description of the drawings]

FIG. 1 is a top view showing a first embodiment of a UV spot light source device according to the present invention.

FIG. 2 is a cross-sectional view of the UV spot light source device shown in FIG.

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

FIG. 4 is a perspective view of the UV spot light source device shown in FIG. 1 with an inner box mounted.

FIG. 5 is a perspective view of the UV spot light source device shown in FIG. 1 with a housing cover attached.

FIG. 6 is a perspective view showing a UV spot light source device according to a second embodiment of the present invention, with a housing cover and an inner box removed.

FIG. 7 is a perspective view of a UV spot light source device according to a third embodiment of the present invention, with a housing cover and an inner box removed.

[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 ... Drive device, 14 ... Partition plate , 15 ... fan, 16, 17 ... ventilation opening, 18 ... inner box, 18b ... rear surface, 18c ... left side surface, 18
f: upper surface, 2: discharge tube, 21: reflection mirror, 21a: reflection mirror fixing plate, 22: emission port, 23: fiber insertion port, 24: ultraviolet transmission filter, 25: fiber, 40
... cylindrical shielding member, 40a ... light guide part, 41 ... shielding plate, 4
1a: Opening, 41b: Bottom, 41c: Support, 42: Shielding cover, 42a: Opening, 5: Shutter, 50: Shutter plate, 51: Shutter drive unit, 6: Shutter, 60: Shutter plate, 61: Shutter Drive unit, 6
2: Support member, 62a: Opening, 62b: Bottom.

Claims (7)

[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. An emission port provided on a front surface of the housing, for emitting light of the light source. The discharge tube and the reflection mirror, between the discharge tube and the reflection mirror, and the front surface of the housing, A light source area on the rear side inside the housing including a reflection mirror, and an output area on the front side inside the housing, a shielding plate having an opening through which light passes, and a shielding plate on the output area side of the shielding plate. A spot light source device, comprising: a cylindrical shielding member that is attached to a surface so as to protrude toward the emission port and has a light guide that allows light to pass therethrough. 2. The spot light source device according to claim 1, wherein a ventilation port is provided at a predetermined portion facing at least one side surface of the housing facing the output region. 3. A shutter for switching ON / OFF of emission of light between the cylindrical shielding member and the emission port in the output area. Or the spot light source device according to 2. 4. The shutter in the output area,
4. The spot light source according to claim 3, further comprising a shielding cover provided between the emission port and the cylindrical shielding member and the shutter, the shielding cover having an opening through which light passes. apparatus. 5. The spot light source device according to claim 3, further comprising a support member for fixing and setting the shutter in the output area. 6. The cylindrical shielding member according to claim 1, wherein the shape of the light guide is tapered toward a front surface of the housing. Item 7. The spot light source device according to item 1. 7. The spot light source device according to claim 1, further comprising a light guide connected to said light exit port to guide emitted light.