JP2011076963A - Light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device capable of preventing an optical axis of a convergence type discharge lamp from being shifted when replacing a lamp. <P>SOLUTION: The light source device 1 includes a device body 4 built in replaceably with the convergence type discharge lamp 44, and outputs a light from a base 6 provided in the device body 4. The light source device 1 includes a lamp attaching block 50 for holding the convergence type discharge lamp 44 to be attachable and detachable. The lamp attaching block 50 includes: a pedestal 52 formed with a U-shaped cut-out for receiving a neck part 61A of the convergence type discharge lamp 44; and a plate-like front plate 54 forming a face perpendicular to an optical axis K, on which a flange part 62A of a convergence type reflecting mirror 62 of the convergence type discharge lamp 44 abuts. The lamp attaching block further includes: a presser part 57 for pressing the neck part 61A received by the pedestal 52; and a presser spring 56 for biasing the convergence type discharge lamp 44 toward the front plate 54, to bring the flange part 62A into tight contact. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a light source device incorporating a condensing type discharge lamp, and more particularly to a technique for preventing an optical axis shift caused by lamp replacement of the condensing type discharge lamp.

  For example, in the flat panel display manufacturing process, conventionally, light is irradiated through a light guide connected to a light source device on a glass plate or paint application surface of an inspection object, and this is observed with a CCD camera or the like to detect scratches or poor paint. An image processing inspection apparatus that detects defects is used. The light source of the light source device may be a solid light element such as a halogen lamp or LED, a discharge lamp such as a mercury lamp or a metal halide lamp. Among these, the discharge lamp is capable of obtaining a high amount of light with a slow rise time. Therefore, it is most suitable as this type of light source. For this reason, various types of light source devices for image processing inspection apparatuses have been proposed that use a condensing discharge lamp in which a condensing reflector is integrated with a discharge lamp as a light source (see, for example, Patent Document 1).

JP 2005-233927 A

By the way, the condensing type discharge lamp is periodically replaced when it is lit for a long time, because the distance between the electrodes increases due to the consumption of the electrodes in the lamp, and the amount of light incident on the light guide decreases due to white turbidity of the arc tube. There is a need.
However, if the concentrating discharge lamp is not accurately positioned when the lamp is replaced, there is a problem that the optical axis in the apparatus main body is shifted and the desired light quantity and efficiency cannot be obtained. Further, if the optical axis of the concentrating discharge lamp is adjusted each time the lamp is replaced, the lamp replacement operation becomes necessary and complicated.
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a light source device that can prevent an optical axis shift of a concentrating discharge lamp accompanying lamp replacement.

  In order to achieve the above object, the present invention provides a light source device that includes a device main body in which a concentrating discharge lamp is replaceably incorporated, and outputs light from a light emitting port provided in the device main body. A lamp mounting base for detachably holding the discharge lamp, wherein the lamp mounting base has a U-shaped notch for receiving a neck portion of the concentrating discharge lamp, and a perpendicular to the optical axis. And a plate-shaped front surface that contacts the flange portion of the reflecting mirror of the concentrating discharge lamp, and a pressing portion that holds the neck received by the pedestal; and the concentrating discharge lamp And an urging means for urging the surface toward the surface and closely contacting the flange portion.

  According to the present invention, in the light source device, the lamp mounting base and the light emission port are fixed to one surface of a plate-shaped base with the optical axis aligned, and the other surface of the concentrating discharge lamp is fixed. The built-in unit is integrally formed by fixing the frame plate that supports the ballast and the lighting control circuit.

  According to the present invention, in the light source device, a wavelength selection filter that is detachably attached to the device main body between the light exit port and the concentrating discharge lamp, and lighting of the condensing discharge lamp The wavelength selection filter is provided with an operator for operating a switch of the interlock circuit when inserted into the apparatus main body.

  According to the present invention, in the light source device, a slide cover that covers the concentrating discharge lamp is provided in the device main body, and sliding of the slide cover is regulated by the wavelength selection filter.

  According to the present invention, the lamp mounting base includes a pressing portion that presses the neck portion received by the pedestal, and a biasing means that biases the concentrating discharge lamp toward the front surface and closely contacts the flange portion. It was. With this configuration, the flange part of the concentrating discharge lamp is in close contact with the front surface, so that the optical axis of the lamp is parallel to the specified optical axis, and the neck part is held down so that the optical axis is aligned. It is done. As a result, the optical axis can be easily and accurately aligned by simply attaching the concentrating discharge lamp to the lamp mounting base, and the lamp can be easily replaced.

1 is a perspective view of an optical device according to an embodiment of the present invention. It is a perspective view which shows the state which removed the upper case body from the apparatus main body. It is a top view which shows the state which removed the upper case body from the apparatus main body. It is the perspective view which looked at the built-in unit from the electric component storage room side. It is a perspective view which shows only the optical system storage chamber of a built-in unit, (A) is the figure seen from the front side, (B) is the figure seen from the back side. It is the figure which looked at the optical system storage chamber from the side. It is a figure which shows the structure of a light control board. It is a figure which shows the state which opened the slide cover of the apparatus main body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an external configuration of a light source device 1 according to the present embodiment.
The light source device 1 is provided, for example, in an image processing inspection apparatus that images a surface of an inspection object and inspects a product by image processing, and via a light guide 2 such as a bundle fiber in which a number of optical fiber strands are bundled. Illuminate the inspection object with illumination light. The light source device 1 according to the present embodiment is sufficiently bright when inspecting an inspection object having a relatively large size such as a glass substrate of a flat panel display in addition to an inspection object having a relatively small size such as a medicine tablet. It is comprised using the obtained light source. In general, the larger the output of the light source, the larger the light source device 1, but the light source device 1 of the present embodiment is a small device such as an image processing inspection device that inspects a medicine tablet while incorporating a high output light source. It has been downsized so that it can be mounted on. Hereinafter, the configuration of the light source device 1 will be described in detail.

  The light source device 1 has a rectangular box-shaped device main body 4. On the front surface 4 </ b> A, a base (light emitting port) 6 to which one end of the light guide 2 is connected and the power of the device main body 4 are turned on / off. There are provided a lighting switch 8, a light control operator 10 which is a rotary operator for adjusting the amount of light, and an outside air inlet 12 for introducing outside air into the apparatus main body 4.

Further, a power cable 14 is provided on the back surface of the apparatus main body 4, and an AC / DC power adapter (power supply unit) 16 that converts commercial AC power into DC power and supplies it to the apparatus main body 4 is provided on the power cable 14. Is provided. By providing the AC / DC power adapter 16 outside the apparatus main body 4, the number of components to be accommodated in the apparatus main body 4 is reduced, and the apparatus can be downsized. In particular, the AC / DC power adapter 16 is a universal input of AC 100 V / 200 V, and is lit with a DC 24 V used in a later-described ballast 38 and a motor 49 that rotationally drives a dimming plate 40 (see FIG. 3 for both). DC12V used by the control circuit board 34 (refer FIG. 3) is output. As described above, the AC / DC power adapter 16 supplies all of several types of DC voltages used in each electrical component of the apparatus main body 4, so that it is not necessary to incorporate an extra power source in the apparatus main body 4. Therefore, further miniaturization becomes possible.
A connection connector 18 (see FIG. 4) to which a signal line for communicating with, for example, a computer terminal or a controller of the image processing inspection apparatus is connected is provided on the back surface of the apparatus body 4.

The apparatus main body 4 includes an upper case body 4B that covers the left and right side surfaces and the upper surface, and a state in which the upper case body 4B is removed is shown in a perspective view of FIG. 2 and a plan view of FIG.
The apparatus main body 4 is provided with a light source base 24 that functions as a partition plate that partitions the interior into an electrical component storage chamber 21 and an optical system storage chamber 22. The electrical component storage chamber 21 is a space for storing various electrical components excluding the light source, and the optical system storage chamber 22 is a space for storing the light source and various optical components. The light source base 24 is formed of a metal plate and shields leakage light and heat transfer from the optical system storage chamber 22 to the electrical component storage chamber 21, so that light irradiation with electrical components stored in the electrical component storage chamber 21 is performed. Heat generation due to such as can be prevented. As a result, the electric component can be arranged near the optical system component without worrying about the leakage light or the movement of heat, and the device can be easily downsized.
The light source base 24 also functions as a base for assembling electric parts and optical parts. By assembling various parts to the light source base 24, a built-in unit 30 in which the parts built in the apparatus body 4 are unitized is configured. Yes.

FIG. 4 is a perspective view of the built-in unit 30 as viewed from the electrical component storage chamber 21 side.
The electrical component storage chamber 21 is vertically divided by a frame plate 32 fixed to the side surface of the light source base 24, and a lighting control circuit board 34 and a motor driver (rotation drive circuit) 36 are disposed on the upper surface of the frame plate 32. A ballast 38 is fixed to the lower surface of the frame plate 32, and a motor 49 (FIG. 3) for rotating a light shielding plate 40 described later is disposed on the lower surface of the frame plate 32. The ballast 38 is supplied with electric power from an AC / DC power adapter 16 provided outside. The ballast 38 is downsized by increasing the efficiency of the drive circuit and adopting the discharge lamp 61 (FIG. 6) having high efficiency (low power consumption). And by arranging the ballast 38 and the lighting control circuit board 34 above and below in the electrical component storage chamber 21, these can be put together in a compact manner. The lighting control circuit board 34 and the ballast 38 are separated to such an extent that the electromagnetic noise generated by the ballast 38 has no effect on the operation of the lighting control circuit board 34. At this time, the ballast 38 and the lighting control circuit board 34 are attached to the frame plate 32 back to back so that the back surfaces face each other, thereby minimizing the space above and below the ballast 38 and the lighting control circuit board 34. The electrical component storage chamber 21 can be further downsized.
The frame plate 32 is bent downward in an L shape in a side view on the front surface 4A side of the apparatus body 4 to constitute a front mounting surface 32A. In addition to the lighting switch 8 and the dimming operation element 10 described above, an intake fan 39 for introducing outside air from the outside air introduction port 12 to the electrical component storage chamber 21 is attached to the front attachment surface 32A. The flow of cooling air inside the apparatus main body 4 will be described later.

5 is a perspective view showing only the optical system storage chamber 22 of the built-in unit 30. FIG. 5A is a view seen from the front surface 4A side, and FIG. 5B is a view seen from the back side. FIG. 6 is a side view of the optical system storage chamber 22.
As shown in these drawings, the optical system storage chamber 22 has a base 6, a light control plate 40 (FIG. 4), a wavelength selection filter 42, and a condensing type from the front surface 4 </ b> A to the back surface side of the apparatus body 4. The discharge lamp 44 and the exhaust fan 46 are attached to the light source base 24 so as to be arranged on the same straight line K. The straight line K is a line extending in parallel with the light source base 24 and coincides with the optical axis of the concentrating discharge lamp 44.

The base 6 is provided with a light incident tube 9 extending toward the inside of the apparatus body 4. The light incident tube 9 is vertically attached and fixed to a mounting surface 25 formed by vertically bending an end portion of the light source base 24 on the front surface 4A side into an L shape, whereby the light incident tube 9 is fixed to the light source base. 24 extends in parallel. The light incident tube 9 includes a ball lens 63 on the optical axis K. The ball lens 63 is an optical element that condenses and enters the light of the condensing discharge lamp 44 on the connection side end face of the light guide 2 connected to the base 6. Normally, in this type of light source device, a hexagonal rod is used as an optical element for introducing the light from the condensing discharge lamp 44 into the light guide 2. By using the ball lens 63 instead of the hexagonal rod, the amount of protrusion of the base 6 to the front can be suppressed. Moreover, since the apparatus which uses the light of the said light source device 1 can be arrange | positioned more closely by this, the optical transmission loss in the path | route from a nozzle | cap | die 6 to an apparatus can also be reduced.
The light control plate 40 is an optical member that is disposed close to the incident opening 9A of the light incident tube 9 and adjusts the amount of light incident on the incident opening 9A. Specifically, as shown in FIG. 7, a dimming slit 41 (which may be a hole) whose opening width gradually increases along a circumference 40A having a predetermined diameter is formed. By arranging the optical axis in alignment with the circumference 40A of the light control plate 40 and rotating the light control plate 40 about the center O of the circumference 40A, the amount of light transmitted through the light control plate 40 can be varied. .

  As shown in FIGS. 5 and 6, the light source base 24 is formed with a slit 48 for inserting the dimming plate 40. As shown in FIG. 4, the dimming plate 40 has a slit (insertion opening) 48. Through the electrical component storage chamber 21 and the optical system storage chamber 22. As described above, the light control plate 40 is rotationally driven by the motor 49 disposed in the electrical component storage chamber 21. The motor 49 is driven and controlled by the motor driver 36 in the electrical component storage chamber 21, and the motor driver 36 rotates and drives the motor 49 according to the operation of the dimming operation element 10, thereby adjusting the operation according to the operation. Light is obtained. In this way, by arranging the light control plate 40 from the electrical component storage chamber 21 to the optical system storage chamber 22, the light control plate 40, which is a relatively large optical component, is not enlarged. Can be paid.

  Here, when the output shaft 49A (FIG. 3) of the motor 49 and the center O of the light control plate 40 are arranged coaxially, it is necessary to lay out the motor 49 at a position where the optical axis K is not shielded. Therefore, in this case, the motor 49 is disposed by increasing the diameter of the light control plate 40 and increasing the distance between the light control slit 41 and the center O. However, the size of the light control plate 40 is increased. It becomes difficult to reduce the size of the apparatus. Therefore, in this embodiment, the output shaft 49A of the motor 49 is not connected coaxially to the center O of the light control plate 40, and the motor 49 is disposed in the electrical component storage chamber 21, and the output shaft 49A ( The axis M) and the center axis 40B (axis A) provided at the center O of the light control plate 40 are connected by a timing belt 60 which is one mode of the power transmission means. As a result, it is not necessary to increase the size of the light control plate 40, and it is not necessary to arrange the motor 49 in the optical system storage chamber 22, so that the optical system storage chamber 22 can be made compact. Note that other means (mechanism) such as gears may be used as the power transmission means in place of the timing belt 60.

  As shown in FIGS. 5 and 6, the wavelength selection filter 42 is disposed between the light control plate 40 and the concentrating discharge lamp 44 so as to face the concentrating discharge lamp 44, for example, an infrared wavelength component. As shown in FIG. 2, the filter includes a filter material 43 and a plate-like support plate 45 that supports the filter material 43. A support 47 that supports the surface of the filter material 43 of the wavelength selection filter 42 so as to be orthogonal to the optical axis K is fixed to the light source base 24, and the wavelength selection filter 42 is vertically supported on the support 47. It is supported so that it can be inserted and removed freely, thereby being configured to be arbitrarily exchangeable.

  Further, a protrusion 45A bent in an L shape is formed on the top of the wavelength selection filter 42, and the protrusion 45A is supported so as to protrude from the upper case body 4B as shown in FIG. ing. The upper case body 4B is provided with a slide cover 7 at a position covering the condensing type discharge lamp 44 so as to be slidable on the front surface 4A side. A protrusion 45A of the wavelength selection filter 42 is located on the front surface 4A side as viewed from the slide cover 7, and the protrusion 45A hits the knob 7A of the slide cover 7 to restrict the slide. Therefore, in order to access the concentrating discharge lamp 44 by sliding the slide cover 7, the wavelength selection filter 42 is extracted from the apparatus main body 4 as shown in FIG. 7 functions as a key to open.

  The concentrating discharge lamp 44 is attached to a lamp mounting base 50 fixed to the light source base 24 as shown in FIGS. The concentrating discharge lamp 44 is a lamp in which a condensing reflecting mirror 62 is provided integrally with a discharge lamp 61. For the discharging lamp 61, a short arc type lamp such as a mercury lamp or a metal halide lamp is preferably used. ing. The condenser-type reflecting mirror 62 has a cup shape as shown in FIG. 6B, and a cylindrical neck portion 61A of the discharge lamp 61 protrudes from the bottom thereof.

The lamp mounting base 50 has a side plate 51 having an L-shape when viewed from the side. The bottom side of the side plate 51 (that is, the bottom surface 50A of the lamp mounting base 50) is parallel to the optical axis K, and the front side (front described later). The lamp mounting base 50 is attached to the light source base 24 so that the plate 54) is perpendicular to the optical axis K.
Further, a base 52 provided with a U-shaped cutout 52 </ b> A into which the neck portion 61 </ b> A of the condensing discharge lamp 44 is fitted on the bottom surface 50 </ b> A of the lamp mounting base 50, and the condensing reflector of the condensing discharge lamp 44 62 is provided with a front plate (front surface) 54 that abuts on the flange portion 62A (FIG. 6). An opening 54 </ b> A is formed in the front plate 54 at a corresponding position of the condensing reflecting mirror 62, and is attached so as to constitute a surface perpendicular to the side surface of the light source base 24. That is, as shown in FIG. 6, the flange portion 62A at the tip of the concentrating discharge lamp 44 is pressed against the front plate 54 without any gap, so that the optical axis of the concentrating discharge lamp 44 is parallel to the optical axis K. Adapted to.

  At this time, since the lamp mounting base 50 is configured to support only the neck portion 61A of the concentrating discharge lamp 44, there is a possibility that the optical axis is shifted after lamp replacement or the like. Therefore, the lamp mounting base 50 is provided with a holding spring 56 as an urging means for urging the condensing reflecting mirror 62 of the condensing discharge lamp 44 from the rear toward the front plate 54. A cover 58 having a pressing portion 57 that presses the neck portion 61 </ b> A supported by 52 from above is provided. The cover 58 is connected to the front plate 54 by a hinge 59 so as to be freely opened and closed. The cover 58 is provided with a protrusion 58A that comes into contact with the slide cover 7 when the cover 58 is closed.

  As a result, the flange portion 62A of the concentrating discharge lamp 44 is brought into close contact with the front plate 54 by the holding spring 56, so that the optical axis of the lamp becomes parallel to the prescribed optical axis K, and the neck portion 61A is disposed on the cover 58. By being pressed by the pressing portion 57, the position of the optical axis of the lamp is adjusted to the position of the prescribed optical axis K. That is, simply attaching the concentrating discharge lamp 44 to the lamp mounting base 50 and closing the cover 58 makes it possible to easily and accurately align the optical axis and facilitate lamp replacement. Further, when the neck portion 61A of the condensing type discharge lamp 44 is not sufficiently fitted in the notch 52A of the pedestal 52 at the time of lamp replacement, the projection 58A of the cover 58 protrudes on the moving line of the slide cover 7 and the slide cover 7 Can not be closed. As a result, it is possible to prevent the condensing discharge lamp 44 from being used in a state where it is not sufficiently mounted.

  The exhaust fan 46 is located behind the lamp mounting base 50 and attached to the light source base 24 and exhausts to the outside from an exhaust port (not shown) provided on the back face of the apparatus main body 4.

  As described above, since the built-in components of the apparatus main body 4 are configured as one built-in unit 30 by assembling both the electrical components and the optical components to the light source base 24, the assembling work is facilitated. In particular, since the components housed in the optical system storage chamber 22 are arranged along a straight line K parallel to the side surface of the light source base 24 as a reference, the respective optical axes can be easily aligned. The optical axis of each component in the optical system storage chamber 22 does not shift during the incorporation into the apparatus main body 4.

Next, the cooling system inside the apparatus main body 4 will be described.
As described above, in the apparatus main body 4, the intake fan 39 is disposed on the front surface 4 </ b> A side of the electrical component storage chamber 21, and the exhaust fan 46 is disposed on the rear surface side of the optical system storage chamber 22. Each part of the apparatus main body 4 is cooled by the outside air taken in and exhausted from the back side.
More specifically, the intake fan 39 is disposed opposite to the ballast 38 and blows outside air directly on the ballast 38 and the motor 49 to cool it. The frame plate 32 that divides the electrical component storage chamber 21 into upper and lower portions has a communication hole 70 that communicates with the upper and lower sides, and the outside air taken in by the intake fan 39 is led to the upper side of the electrical component storage chamber 21 through the communication hole 70 and lights up. The control circuit board 34, the motor driver 36, and the I / O board 37 are cooled.

  In addition, outside air flows from the electrical component storage chamber 21 toward the optical system storage chamber 22 through a slit 48 provided in the light source base 24 in order to arrange the light control plate 40, and the light control plate 40, the wavelength selection filter 42. The condensing type discharge lamps 44 are sequentially cooled and discharged from the exhaust fan 46 to the outside.

Thus, the outside air taken in from the front surface 4A side of the electrical component storage chamber 21 is introduced into the optical system storage chamber 22 from the slit 48 formed in the light source base 24 for the arrangement of the light control plate 40. Therefore, it is not necessary to separately provide a member for introducing outside air in the optical system storage chamber 22. In addition, when the inside of the apparatus main body 4 is cooled by a single fan, it is necessary to use a large fan, which makes it difficult to reduce the size of the apparatus. In contrast, according to the present embodiment, the intake fan 39 is provided in the electrical component storage chamber 21, and the exhaust fan 46 is provided in the optical system storage chamber 22, thereby cooling the inside of the apparatus main body 4 with one fan. Since the cooling efficiency equivalent to the case can be realized with a small fan, the apparatus can be easily downsized.
Further, when optical components are arranged in the optical system storage chamber 22 along the straight line K, it is necessary to separately provide an outside air inlet on the front surface 4A of the optical system storage chamber 22 in order to cool them at the same time. Since the cap 6 is provided in 4A, it is necessary to enlarge the apparatus in order to secure a space in the front surface 4A for separately providing an outside air introduction port. On the other hand, in this embodiment, since it is the structure introduce | transduced into the optical system storage chamber 22 from the slit 48, each optical component arranged in a row can be cooled efficiently, avoiding the enlargement of an apparatus.

Here, as the light source device 1 for the image processing inspection apparatus, it is necessary to suppress uneven illuminance and temporal variation of the light amount in the irradiation field. In general, the concentrating discharge lamp 44 has a temperature dependency on the light output, and the light output may vary due to excessive or insufficient cooling.
In particular, in the light source device 1 of the present embodiment, the cooling air flows from the wavelength selection filter 42 toward the concentrating discharge lamp 44. Therefore, if the wavelength selecting filter 42 is not inserted, the condensing discharge lamp 44 is not inserted. The amount of air that hits directly increases and becomes too cold. In addition to this, the light of the infrared component cut by the wavelength selection filter 42 acts to heat the condensing type discharge lamp 44 as well, but when there is no wavelength selection filter 42, this heating action also occurs. Therefore, the concentrating discharge lamp 44 is further cooled, which causes variations in light output.

Therefore, the light source device 1 of the present embodiment is configured to prohibit the light emission of the concentrating discharge lamp 44 when the wavelength selection filter 42 is not inserted.
More specifically, as shown in FIG. 3, an interlock circuit 72 is disposed in the uppermost layer of the electrical component storage chamber 21 so as to be close to the light source base 24. The interlock circuit 72 is a circuit that prohibits lighting control by the lighting control circuit board 34. That is, the interlock circuit 72 includes a normally-open contact type interlock switch 74 extending along the light source base 24. When the interlock switch 74 is opened, the interlock circuit 72 collects light by the lighting control circuit board 34. When the lighting of the optical discharge lamp 44 is prohibited (interlock) and the interlock switch 74 is pressed and closed, the interlock is released.

Further, as shown in FIG. 4, the protruding portion 45 </ b> A of the wavelength selection filter 42 extends from the optical system storage chamber 22 to the electrical component storage chamber 21, and has an interlock at the end that enters the electrical component storage chamber 21. An operation piece 75 for pressing the switch 74 is provided.
Thus, when the wavelength selection filter 42 is inserted into the apparatus main body 4, the operation piece 75 depresses the interlock switch 74, thereby releasing the interlock of the interlock circuit 72 and allowing the concentrating discharge lamp 44 to be lit. In addition, when the wavelength selection filter 42 is removed from the apparatus main body 4, the interlock is activated and lighting of the concentrating discharge lamp 44 is prohibited.
That is, when the wavelength selection filter 42 is not inserted, the interlock circuit 72 prohibits the light emission of the concentrating discharge lamp 44, and thus the above-described overcooling of the concentrating discharge lamp 44 can be prevented. .

Further, as described above, the protrusion 45A of the wavelength selection filter 42 also functions as a restricting member that restricts the slide of the slide cover 7, so that the light is collected by opening the slide cover 7 when replacing the lamp. In order to access the mold discharge lamp 44, the wavelength selection filter 42 is extracted from the apparatus main body 4. If the wavelength selection filter 42 is removed, even if the power is turned on, the interlock is activated by the above-described interlock circuit 72 and the power is forcibly cut off. Safety is enhanced.
In addition to this, when the neck portion 61A of the condensing type discharge lamp 44 is not securely fitted to the base 52 of the lamp mounting base 50 when the lamp is replaced, as described above, the protrusion of the cover 58 of the lamp mounting base 50 Since the slide cover 7 cannot be closed by the portion 58A, the wavelength selection filter 42 cannot be inserted and the interlock is not released, so that the condensing type discharge lamp 44 is not sufficiently mounted. Lighting can be reliably prevented.

According to the light source device 1 of the present embodiment, the following effects can be obtained.
That is, according to this embodiment, since the AD / DC power adapter 16 that supplies power to the ballast 38 is provided outside the apparatus main body 4, the apparatus main body 4 can be downsized. In particular, the inside of the apparatus main body 4 is divided into an electrical component storage chamber 21 and an optical system storage chamber 22 by a light source base 24 as a partition plate, and a ballast 38 and a concentrating discharge lamp 44 are turned on in the electrical component storage chamber 21. Since the control circuit board 34 is arranged so as to overlap each other, the electric component storage chamber 21 becomes compact.
Further, in the optical system storage chamber 22, since the base 6 and the condensing type discharge lamp 44 are arranged on a straight line K parallel to the light source base 24, the lateral width of the optical system storage chamber 22 (the light source base 24 The length in the direction perpendicular to the side surface does not unnecessarily extend, and the apparatus can be miniaturized.
In addition, since the light source base 24 shields the leakage light and heat from the optical system storage chamber 22 to the electrical component storage chamber 21, it is close to the optical system components without worrying about the influence of the leakage light or heat. Thus, it is possible to arrange the electrical components in the device, and the size of the device can be easily reduced.

  According to the present embodiment, the light control plate 40 is provided between the concentrating discharge lamp 44 and the base 6 and adjusts the amount of light incident on the base 6 according to the rotation. A rotating motor 49 is disposed in the electrical component storage chamber 21, and an output shaft 49 </ b> A of the motor 49 is connected to a rotating shaft 40 </ b> B of the light control plate 40 via a timing belt 60. According to this configuration, compared with the case where the output shaft 49A of the motor 49 and the center O of the light control plate 40 are arranged coaxially, it is not necessary to enlarge the light control plate 40, and the motor 49 is disposed in the optical system storage chamber. Therefore, the optical system storage chamber 22 can be made compact.

Further, according to the present embodiment, the slit 48 for inserting the rotary light control plate 40 is provided in the light source base 24, and the light control plate 40 is disposed across the electrical component storage chamber 21 and the optical system storage chamber 22. Therefore, even when a relatively large light control plate 40 is provided, the device main body 4 can be accommodated in a compact manner.
Further, outside air introduced from the outside air inlet 12 on the front surface 4A side of the electrical component housing chamber 21 is introduced into the optical system housing chamber 22 through the slit 48 of the light source base 24, and the optical components including the condensing discharge lamp 44 are cooled. Therefore, it is not necessary to secure a space for providing the outside air inlet 12 in the optical system storage chamber 22, and the size of the apparatus can be prevented from being increased.

  Further, according to the present embodiment, the ball lens 63 for introducing the light of the condensing type discharge lamp 44 into the light guide 2 connected to the base 6 is provided in the base 6. According to this structure, the protrusion amount to the front of the nozzle | cap | die 6 can be restrained compared with the structure using the conventional hexagonal rod. Moreover, since the apparatus which uses the light of the said light source device 1 can be arrange | positioned more closely by this, the optical transmission loss in the path | route from a nozzle | cap | die 6 to an apparatus can also be reduced.

  Further, according to the present embodiment, the wavelength selection filter 42 is provided with the operation piece 75 for operating the interlock switch 74 of the interlock circuit 72 when inserted into the apparatus body 4, so that the wavelength selection filter 42 is not present. Lighting of the concentrating discharge lamp 44 can be prevented. In addition, variation in the amount of light due to overcooling of the concentrating discharge lamp 44 can be suppressed.

  In addition, according to the present embodiment, the slide cover 7 that covers the condensing type discharge lamp 44 is provided in the apparatus main body 4 and the slide of the slide cover 7 is regulated by the wavelength selection filter 42. Since the interlock is activated when the lamp is removed, the safety during lamp replacement can be improved.

Further, according to the present embodiment, the lamp mounting base 50 urges the concentrating discharge lamp 44 toward the front plate 54 and the flange portion 62 </ b> A by pressing the neck portion 61 </ b> A received by the pedestal 52. A pressing spring 56 to be in close contact is provided.
According to this configuration, since the flange portion 62A of the condensing type discharge lamp 44 is in close contact with the front plate 54 by the holding spring 56, the optical axis of the lamp is parallel to the specified optical axis K, and the neck portion 61A is covered. Since it is pressed by the pressing portion 57 of 58, the position of the optical axis of the lamp is adjusted to the position of the prescribed optical axis K. That is, simply attaching the concentrating discharge lamp 44 to the lamp mounting base 50 and closing the cover 58 makes it possible to easily and accurately align the optical axis and facilitate lamp replacement.

Further, according to the present embodiment, the lamp mounting base 50 and the base 6 are fixed to one surface of the light source base 24 with the optical axis K aligned, and the ballast 38 of the concentrating discharge lamp 44 is fixed to the other surface. The built-in unit 30 is integrally formed by fixing the frame plate 32 that supports the lighting control circuit board 34.
Thereby, when assembling the optical component into the apparatus main body 4, the optical axis of each component does not shift, and the assembly work of the apparatus becomes easy.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.
For example, in the above-described embodiment, the light source device suitable for being provided in the image processing inspection apparatus is illustrated, but the light source device according to the present invention can also be used as a projector device (image projection device) that projects an image.

DESCRIPTION OF SYMBOLS 1 Light source device 4 Apparatus main body 6 Base 7 Slide cover 12 Outside air introduction port 16 AC / DC power supply adapter 21 Electrical component storage room 22 Optical system storage room 24 Light source base (partition plate)
30 Built-in unit 32 Frame plate 34 Lighting control circuit board 36 Motor driver 38 Ballast 39 Intake fan 40 Dimming plate 42 Wavelength selection filter 44 Condensing type discharge lamp 45A Projection part 46 Exhaust fan 48 Slit 49 Motor 50 Lamp mounting base 52 Base 54 Front plate 56 Presser spring (biasing means)
57 Holding part 58 Cover 60 Timing belt 61A Neck part 62 Condensing reflector 62A Flange part 63 Ball lens 70 Communication hole 72 Interlock circuit 74 Interlock switch 75 Operation piece K Optical axis (straight line)

Claims (4)

In a light source device that includes a device main body in which a concentrating discharge lamp is replaceably incorporated, and that outputs light from a light emission port provided in the device main body,
A lamp mounting base for detachably holding the concentrating discharge lamp;
The lamp mounting base has a pedestal formed with a U-shaped notch for receiving the neck portion of the concentrating discharge lamp, and a flange of the reflecting mirror of the concentrating discharge lamp that forms a plane perpendicular to the optical axis. A plate-like front surface against which the portion abuts, a pressing portion for pressing the neck portion received by the pedestal, and a biasing means for biasing the concentrating discharge lamp toward the front surface and closely contacting the flange portion A light source device comprising:   The lamp mounting base and the light emission port are fixed to one surface of a plate-like base with the optical axis aligned, and the other surface supports the condenser discharge lamp ballast and the lighting control circuit. The light source device according to claim 1, wherein the built-in unit is integrally formed by fixing the frame plate. A wavelength selection filter provided detachably with respect to the apparatus main body between the light exit port and the concentrating discharge lamp;
An interlock circuit that interlocks lighting of the concentrating discharge lamp,
3. The light source device according to claim 1, wherein the wavelength selection filter is provided with an operation element that operates a switch of the interlock circuit when inserted into the device main body.   The light source device according to claim 3, wherein a slide cover that covers the concentrating discharge lamp is provided in the apparatus main body, and sliding of the slide cover is regulated by the wavelength selection filter.

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