JPH11258705A - Light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To have a light source and other optical parts hardly soiled and to restrain the temperature rise of the light source by arranging and tightly enclosing the light source inside a housing, and providing a heat exchanging means performing heat exchange between the inside and the outside of the housing. SOLUTION: A light source unit is arranged and tightly enclosed inside a light source housing 2. A dustproof glass 10 is connected to the housing 2 through a rubber packing 11. Thus, the hermetically sealing state of the housing 2 is kept. The housing 2 is provided with an aperture on its upper surface, and the device is provided with a heat pipe 3 performing the heat exchange between the inside and the outside of the housing 2 through the aperture. Heat generated in the light source unit is discharged to the outside only through the pipe 3, so that influence by the heat to a member arranged on the periphery of the housing 2 is eliminated. Outside air is introduced to prevent the lowering of performance and the deterioration of the parts due to the adhesion of soiling caused by involving dust or dirt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device used for scanning a photographic film or printing a photosensitive material such as photographic printing paper.

[0002]

2. Description of the Related Art Conventionally, a halogen lamp has been widely used as a light source for scanning a photographic film or printing a photosensitive material such as photographic printing paper. Halogen lamps generate a large amount of heat when emitting light, so that various parts in the light source housing that accommodates the halogen lamp are heated. Therefore, a structure for cooling the inside of the light source housing is required in order to keep the temperature rise of various components in the light source housing within the allowable temperature.

FIG. 3 is a schematic diagram showing a schematic configuration of a conventional light source device for photographic printing. A halogen lamp 31 and a reflector 32 are arranged inside a light source housing 33. A heat sink 34 for absorbing and dissipating heat is provided in the lamp sealing portion of the halogen lamp 31.

A part of the light emitted from the halogen lamp 31 is reflected by a reflector 32, passes through a dust-proof glass 35, and enters a negative mask (not shown).

[0005] An exhaust port 36 is provided on one side surface of the light source housing 33, and a cooling fan 37 is provided in the exhaust port 36. An air inlet 38 is provided on the other side surface of the light source housing 33, and an air filter 39 is provided in the air inlet 38. When the cooling fan 37 rotates in such a direction as to suck the air in the light source housing 33, the outside air flows into the light source housing 33 from the air inlet 38 through the air filter 39. Then, the inflowing outside air is exhausted from the exhaust port 36 after cooling components such as the heat sink 34 and the reflector 32 provided in the halogen lamp 31.

As described above, in the conventional light source device for photographic printing, cooling is performed by introducing outside air into the light source housing 33 in order to suppress the temperature rise of various components in the light source housing 33.

[0007]

However, when cooling is performed by introducing outside air into the light source housing 33 as in the above-described configuration, dust and dirt are entrained in the light source housing 33. . This allows
A problem arises in that dirt adheres to the optical components in the light source housing 33, which causes a reduction in performance and deterioration of each component. In order to prevent such a problem, maintenance such as periodically cleaning the inside of the light source housing 33 has been required.

Further, since the relatively large cooling fan 37 is used, there is a problem that noise is generated when the cooling fan 37 rotates. Furthermore, the arrangement of the intake port 38 and the exhaust port 36 and the arrangement of each component in the light source housing 33 must be set in consideration of the air flow path in the light source housing 33.
There were significant restrictions on the shape of No. 3 and the arrangement relationship of each part.

An object of the present invention is to provide a light source device in which a light source and other optical parts are hardly stained and a configuration for suppressing a rise in the temperature of the light source is simplified.

[0010]

According to a first aspect of the present invention, there is provided a light source device comprising: a light source that generates heat when emitting light; a housing that surrounds the entire light source; A heat exchange means for exchanging heat with the outside, wherein the light source is hermetically disposed inside the housing.

According to the above arrangement, the light source is disposed inside the sealed housing, and the heat in the housing is released to the outside by the heat exchange means in order to suppress a rise in the temperature inside the housing due to the heat generated by the light source. Therefore, it is possible to prevent dust and dust from entering the inside of the housing. Accordingly, since the dirt does not adhere to the light source and other optical components, a high-quality light source device can be provided without deterioration of performance or deterioration of each component due to dirt. At the same time, it is not necessary to clean the inside of the housing, so that the maintenance work can be simplified.

Further, since the cooling in the housing is performed by the heat exchanging means, for example, a large-sized cooling fan or the like which is required when cooling is performed by blowing air into the housing becomes unnecessary. Therefore, the problem of noise due to the rotation of the cooling fan, which has occurred in a configuration requiring a cooling fan, is eliminated, and a light source device excellent in quietness can be provided.

Further, for example, in a configuration in which air is blown into the casing to cool it, a configuration such as an intake port, an exhaust port, a cooling fan, an air filter, and the like is required as a configuration for cooling. Although it was necessary to consider the air circulation path in the body, in the present invention, only the heat exchange means may be provided as a configuration for cooling. Therefore, since the configuration of the device is simplified, the degree of freedom in the shape and arrangement of the device can be increased, and the manufacturing cost and material cost can be reduced.

According to a second aspect of the present invention, in the light source device according to the first aspect, the housing has a heat insulating function.

According to the above configuration, since the housing has a heat insulating function, heat generated from the light source is released to the outside of the housing only by the heat exchange means. That is, since heat is not released from the outer wall of the housing, it is possible to eliminate the influence of heat on devices arranged around the light source device.

According to a third aspect of the present invention, in the light source device according to the first aspect, the heat exchange means is a member made of metal.

According to the above configuration, since the heat exchanging means is a member made of metal, the heat exchanging means is easily formed and inexpensive. Therefore, manufacturing costs and material costs can be reduced.

According to a fourth aspect of the present invention, in the light source device according to the first aspect, the heat exchange means is a heat pipe in which a refrigerant is sealed in a hollow pipe made of metal.

According to the above configuration, since the heat exchange is performed by utilizing the phase change of the refrigerant, the efficiency of the heat exchange can be improved. In addition, the type of the refrigerant can be appropriately selected so that the heat exchange efficiency is maximized according to the temperature in the housing, so that a light source device with high cooling efficiency in the housing can be provided.

According to a fifth aspect of the present invention, there is provided a light source device comprising: a light source which generates heat when emitting light; and a reflector which reflects light emitted from the light source in a substantially constant direction, wherein the reflector comprises a metal block. The block is characterized by having a heat capacity capable of reducing a temperature rise of the light source by absorbing heat from the light source.

According to the above configuration, the reflector includes:
Since it has a reflection function of reflecting light emitted from the light source in a substantially constant direction and a heat sink function of reducing the temperature rise of the light source by absorbing heat from the light source, a configuration having a reflection function, The configuration of the light source device can be further simplified as compared with the case where the configuration having the heat sink function is separately provided. This leads to simplification of the manufacturing process, so that manufacturing cost and material cost can be reduced.

Further, the temperature rise of the light source can be reduced by the heat sink function of the reflector. Therefore, without providing a cooling fan conventionally required for cooling the light source and other parts, the natural heat of the reflector can be used. Cooling can be performed. Therefore, the problem of noise caused by the cooling fan can be solved, and the configuration of the light source device can be further simplified.

According to a sixth aspect of the present invention, in the configuration of the fifth aspect, the light source device further includes a heat exchange unit connected to the reflector, and a heat radiation unit connected to the heat exchange unit.
It is characterized in that the heat of the reflector is conducted to the heat radiating means via the heat exchanging means.

According to the above configuration, the heat of the reflector is
The heat is transmitted to the heat radiating means through the heat exchanging means, and the heat can be released more efficiently by the heat radiating means. Therefore, the temperature rise of the light source can be suppressed more efficiently.

According to a seventh aspect of the present invention, in the light source device according to the sixth aspect, the light source and the reflector are disposed inside a closed casing, and the heat radiating means is disposed outside the casing. It is characterized by being.

According to the above configuration, since the light source and the reflector are arranged inside the closed casing, it is possible to prevent dust and dust from entering the inside of the casing. Accordingly, dirt does not adhere to the light source, the reflecting surface of the reflector, and other optical components, so that it is possible to provide a high-quality light source device without deterioration in performance or deterioration of components due to dirt. At the same time, it is not necessary to clean the inside of the housing, so that the maintenance work can be simplified.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] The following will describe one embodiment of the present invention with reference to FIG. In the following description, a light source device for photographic printing will be described as an example of the light source device. However, the light source device for scanning can be applied to a light source device for scanning or a general light source device with the same configuration.

FIG. 1 is a schematic diagram showing a schematic configuration of a light source device for photographic printing according to an embodiment of the present invention. The photographic printing light source device includes a light source unit 1, a light source housing (housing) 2, a heat pipe 3, a radiator 4 for radiating heat from the heat pipe 3, and a fan 5 for cooling the heat of the radiator 4. It has.

The light source unit 1 is provided in a halogen lamp (light source) 6, a socket 7 for supplying power to the halogen lamp 6, and a lamp sealing portion of the halogen lamp 6.
The apparatus includes a heat sink 8 for absorbing and dissipating heat, and a substantially spherical reflector 9 for reflecting light emitted from the halogen lamp 6 in a substantially constant direction. The light source unit 1 having such a configuration is hermetically disposed inside the light source housing 2.

An opening is provided in a side wall of the light source housing 2 on a side in which light emitted from the light source unit 1 travels, and a light-transmitting dustproof glass 10 is arranged so as to close the opening. The dustproof glass 10 is connected to the light source housing 2 via a rubber packing 11, whereby the hermetic seal inside the light source housing 2 is maintained.

An opening is also provided on the upper surface of the light source housing 2, and a heat pipe 3 for exchanging heat between the inside and the outside of the light source housing 2 is provided through this opening. This heat pipe 3 is also connected to the light source housing 2 via a rubber packing 11 in order to keep the inside of the light source housing 2 sealed.

The lower part of the heat pipe 3 is the light source housing 2
So that the heat pipe 3 at a portion positioned inside the light source housing 2 is positioned near the heat sink 8 or the halogen lamp 6 as a heat source.
The heat pipe 3 is arranged.

The upper part of the heat pipe 3 is connected to a radiator 4. The radiator 4 has a configuration in which a plurality of aluminum plates are arranged so as to overlap each other at intervals. Each aluminum plate is provided with an opening provided with a flange, and the heat pipe 3 is inserted through each of the openings. That is, heat from the heat pipe 3 is conducted to each aluminum plate through the flange of each aluminum plate. Then, the air is sent from the fan 5 so as to pass through the gap between the aluminum plates, whereby the respective aluminum plates are cooled.

The light source housing 2 may have a structure in which a heat insulating material is attached to the inner surface. With such a configuration, the heat generated in the light source unit 1 is released to the outside only through the heat pipe 3, so that the influence of heat on members disposed around the light source housing 2 is eliminated. Can be. As the heat insulating material, a porous sponge-like material having a heat-resistant temperature of about 80 ° C. is preferably used, but is not particularly limited thereto.

Here, the heat pipe 3 will be described in detail below. The heat pipe 3 has a configuration in which water (refrigerant) is sealed inside a pipe made of copper. At the lower part of the heat pipe 3, the water heated by the heat inside the light source housing 2 evaporates and rises to the upper part of the heat pipe 3. The steam that has risen to the upper part of the heat pipe 3 is cooled by the radiator 4 and condenses again, and falls to the lower part of the heat pipe 3 by gravity. By repeating the above-described circulation, the heat pipe 3 discharges the heat inside the light source housing 2 to the outside of the light source housing 2. The heat conductivity of the heat pipe 3 having the above configuration is, for example, about 1000 times that of silver as a single element, and is extremely excellent in heat exchange performance.

In the heat pipe 3, if a plurality of grooves (grooves) are provided on the inner wall of the tube, the surface area of the inner wall becomes larger, so that the heat exchange performance can be further improved.

Further, a plurality of heat absorbing fins may be provided on an outer wall of a portion of the heat pipe 3 located inside the light source housing 2. Accordingly, the surface area of the heat pipe 3 in the light source housing 2 increases, so that the efficiency of heat exchange by the heat pipe 3 can be further increased.

Further, in order to generate a flow of air in the sealed light source housing 2, the light source housing 2
May be provided with a small fan. Thereby, the bias of heat inside the light source housing 2 can be eliminated, so that the efficiency of heat exchange by the heat pipe 3 can be further increased.

The heat pipe 3 is, as described above,
This is a configuration in which heat exchange is performed by a phase change of water, and utilizes that cooled and liquefied water falls to the lower part of the heat pipe 3 by gravity. Therefore, normally, the heat pipe 3 is provided so as to absorb heat at the lower portion and emit heat at the upper portion. However, when the heat pipe 3 is provided with, for example, a cotton or gauze-like fibrous material on the inner wall of the pipe of the heat pipe 3, the cooled and liquefied water may move in the pipe due to a capillary phenomenon. it can. Such a heat pipe 3 can be arranged so that its longitudinal direction is horizontal.

The heat pipe 3 according to the present embodiment
Has a structure in which water is sealed inside a tube made of copper, as described above, but is not limited to this structure.
For example, as the material of the tube, a material having good thermal conductivity such as aluminum can be used. Further, as the refrigerant, for example, alcohol, a mixture of water and impurities, or chlorofluorocarbon can be used as appropriate according to the temperature on the high temperature side and the temperature on the low temperature side in the heat pipe 3.

In this embodiment, the heat pipe 3 as described above is used as the heat exchange means. However, the present invention is not limited to this. For example, the heat pipe 3 may be made of a material having a high thermal conductivity such as metal. It is also possible to perform the heat exchange using the above member or a block-shaped member. In this case, the metal member is easily formed and inexpensive, so that the manufacturing cost and the material cost can be reduced. The shape may be any shape as long as heat can be efficiently exchanged between the inside and the outside of the light source housing 2.

As described above, in the photographic printing light source device according to the present embodiment, the light source unit 1 is sealed inside the light source housing 2, and the heat generated from the halogen lamp 6 is discharged to the outside by the heat pipe 3. It has a configuration. As a result, dust and dirt are entrained in the light source housing 2 when cooling is performed by introducing outside air into the light source housing 2 as in the related art, and dirt adheres to the optical components in the light source housing 2. It is possible to solve the problem of causing performance degradation, component degradation, and the like due to this. Therefore, the light source housing 2 is periodically
Maintenance such as cleaning the inside becomes unnecessary.

Further, since a relatively large cooling fan, which has been conventionally required, is not required, noise generated when the cooling fan rotates is eliminated, and a light source apparatus for photographic printing excellent in quietness is provided. be able to.

Further, since the configuration of the intake port, the exhaust port, the air filter, the cooling fan, and the like, which have been conventionally required, becomes unnecessary and the configuration of the light source housing 2 becomes relatively simple, the shape of the light source housing 2 can be freely adjusted. The degree increases. Therefore, in relation to devices other than the light source device for photographic printing,
The shape of the photographic printing light source device can be made to be an optimum shape, so that the design can be optimized and the space of the device can be saved.

[Second Embodiment] The following will describe another embodiment of the present invention with reference to FIG. Note that the same reference numerals are given to components having the same functions as those described in the first embodiment, and the description thereof will be omitted. In the following description, as the light source device,
A light source device for photographic printing will be described as an example, but the same configuration is applicable to a scanning light source device or a general light source device.

FIG. 2A is a sectional view showing a schematic configuration of a photographic printing light source device according to an embodiment of the present invention, and FIG. 2B is a sectional view taken along line XX in FIG. 2A. It is arrow sectional drawing in alignment with. The photographic printing light source device includes a halogen lamp 6, a heat sink 8,
The light source housing 2 includes a reflector 9, a heat ray reflection filter 14, an aspheric lens 15, and a cold mirror 16. A radiator (radiator) 13 and a mirror tunnel 17 are provided outside the light source housing 2. Further, a heat exchange pipe (heat exchange means) 12 for exchanging heat between the reflector 9 and the radiator 13 is provided.

First, the configuration of an optical system related to light irradiation will be described below. The halogen lamp 6 is connected to a heat sink 8 that supplies electric power, and a reflector 9 that reflects light emitted from the halogen lamp 6 in a substantially constant direction is connected to the heat sink 8.

The reflector 9 has a substantially rectangular parallelepiped metal such as aluminum or copper, for example, and has a shape obtained by hollowing out the center of one surface into a substantially hemispherical shape. The structure is used as a surface. As described above, since the volume of the metal portion is large, the reflector 9 in the present embodiment also has a function as a heat sink for absorbing and releasing heat. That is, the reflector 9 is formed of a metal block having a heat capacity capable of reducing the temperature rise by absorbing the heat from the halogen lamp 6.

It should be noted that the reflector 9 having the above-described configuration is used.
Is a halogen lamp 6
Therefore, it is also possible to adopt a configuration in which cooling is performed by the natural heat radiation of the reflector 9 without providing the heat exchange pipe 12 and the like.

On the optical axis of the light emitted from the halogen lamp 6, a heat ray reflection filter 14, an aspheric lens 15, and a cold mirror 16 are arranged in this order from the halogen lamp 6 side. The normal direction of the surface of the heat ray reflection filter 14 and the surface of the aspherical lens 15 coincides with the direction of the optical axis, and the normal direction of the surface of the cold mirror 16 is inclined by 45 degrees with respect to the direction of the optical axis. .

The heat ray reflection filter 14 has a wavelength of about 750.
It has a function of reflecting infrared light of nm or more and transmitting other light. The aspheric lens 15 has a function of converting incident light into parallel light.

The cold mirror 16 transmits infrared light,
It has the function of reflecting visible light. As described above, the normal direction of the surface of the cold mirror 16 is inclined by 45 degrees with respect to the optical axis of the light emitted from the halogen lamp 6, so that the visible light emitted from the halogen lamp 6 is reflected by the cold mirror 16. By being reflected, the direction of the optical axis can be bent by 90 degrees.

In the light source housing 2, an opening is provided in a portion where the visible light reflected by the cold mirror 16 reaches, and a mirror tunnel 17 is arranged so as to close this opening. The mirror tunnel 17 has a function of emitting an even and uniform light beam by irregularly reflecting incident light.

The light emitted from the mirror tunnel 17 enters a negative mask (not shown) to expose the photographic paper. As described above, since the light emitted from the halogen lamp 6 is subjected to infrared rays removal by the heat ray reflection filter 14 and the cold mirror 16, it is possible to prevent the temperature of the photographic paper from rising due to the light applied to the photographic paper. it can.

As described above, the optical system such as the halogen lamp 6, the reflector 9, the heat ray reflection filter 14, the aspherical lens 15, and the cold mirror 16 are sealed inside the light source housing 2.

Next, a configuration for performing heat exchange will be described below. The heat exchange pipe 12 is formed of a solid pipe made of a metal such as copper or aluminum, and is arranged so as to penetrate the metal part of the reflector 9 and the inside of the radiator 13. To be more specific, the heat exchange pipe 1
2 is molded in a substantially square ring shape, a portion corresponding to one side is embedded in the reflector 9,
A portion corresponding to the opposite side is embedded in the radiator 13. FIG. 2B shows such a heat exchange pipe 12.
As shown in FIG. 2, two reflectors are provided above and below the reflector 9.

The heat exchange pipe 12 is not limited to the above-described shape and arrangement, but may have any structure as long as the heat exchange pipe 12 is in close contact with the reflector 9 and the radiator 13. Good.

For example, in this embodiment, two heat exchange pipes 12 are provided above and below the reflector 9, but two heat exchange pipes 12 are provided on the left and right of the reflector 9, It is also possible to adopt a configuration in which three or more are provided. Although the heat exchange pipe 12 has a circular cross section, a square cross section may be used. Further, the heat exchange pipe 12 is formed in a straight rod shape, and flange portions are provided at both ends, and the plurality of heat exchange pipes 12, the reflector 9 and the radiator 13 are arranged so that the flange portions are in close contact with the reflector 9 and the radiator 13.
May be bonded with bolts or the like.

The temperature of the reflector 9 is about 200 to 300 ° C. due to the heat generated by the halogen lamp 6, and this heat is transmitted to the radiator 13 through the heat exchange pipe 12 as described above.

The radiator 13 is made of a metal such as copper or aluminum, and a plurality of fins are formed on a radiating surface to promote a radiating effect. In order to promote the heat radiation effect, a forced cooling fan 18 may be provided as shown by a two-dot chain line in FIG.

In this embodiment, the reflector 9 is
Although the configuration is such that the entirety is located inside the light source housing 2, for example, the configuration may be such that the surface of the reflector 9 opposite to the reflection surface is exposed to the outside of the light source housing 2. With such a configuration, the heat of the reflector 9 is also radiated to the outside from the portion exposed to the outside of the reflector 9, so that the cooling effect can be enhanced.

As described above, in the photographic printing light source device according to the present embodiment, the optical system is hermetically disposed inside the light source housing 2, and the heat generated from the halogen lamp 6 by the heat exchange pipe 12. Is discharged to the outside. Therefore, similarly to the first embodiment, since it is not necessary to perform cooling by introducing outside air into the light source housing 2, the performance is deteriorated due to entrainment of dust and dust in the light source housing 2, and the deterioration of each part is deteriorated. The problem of causing such problems can be solved. Therefore, maintenance such as periodically cleaning the inside of the light source housing 2 becomes unnecessary.

Since a relatively large cooling fan for introducing outside air into the light source housing 2 is not required,
Noise generated when the cooling fan rotates is eliminated, and a light source device for photographic printing excellent in quietness can be provided. Similarly, since the configuration of the intake port, the exhaust port, the air filter, the cooling fan, and the like is unnecessary, the light source housing 2
The degree of freedom of the shape is increased. Therefore, the shape of the light source device for photographic printing can be made optimal in relation to devices other than the light source device for photographic printing, so that the design can be optimized and the space of the device can be saved.

Further, since the reflector 9 is made of metal and also has a function as a heat sink, it is not necessary to separately provide a heat sink. In addition, the reflector 9
Since the heat exchange pipe 12 is directly connected to the heat exchange pipe 12 to discharge the heat of the reflector 9 to the outside, the cooling efficiency can be remarkably increased.

[0065]

As described above, the light source device according to the first aspect of the present invention provides a light source that generates heat when emitting light, a housing that surrounds the entire light source, and heat between the inside and outside of the housing. Heat exchange means for performing exchange, wherein the light source is hermetically disposed inside the housing.

As a result, it is possible to prevent dust and dust from entering the housing. Therefore, since the dirt does not adhere to the light source and other optical components, it is possible to provide a high-quality light source device without deterioration in performance or deterioration of each component due to dirt.

Further, for example, a large-sized cooling fan or the like, which is required when cooling is performed by sending air to the inside of the housing, becomes unnecessary, so that a light source device excellent in quietness can be provided. It works.

Further, since only the heat exchanging means needs to be provided as a structure for cooling, the structure of the device is simplified, and the degree of freedom of the shape and arrangement of the device can be increased.

In the light source device according to the second aspect of the present invention, the housing has a heat insulating function.

Thus, in addition to the effect of the first aspect, the heat generated from the light source is released to the outside of the housing only by the heat exchanging means. This has the effect of eliminating the influence of heat on the equipment.

A light source device according to a third aspect of the present invention is characterized in that the heat exchange means is a member made of metal.

Thus, in addition to the effect of the first aspect, since the heat exchange means is a member made of metal,
It is easy to mold and inexpensive. Therefore, there is an effect that manufacturing cost and material cost can be reduced.

A light source device according to a fourth aspect of the present invention is configured such that the heat exchange means is a heat pipe in which a refrigerant is sealed in a hollow pipe made of metal.

Thus, in addition to the effect of the first aspect, the heat exchange is performed by utilizing the phase change of the refrigerant, so that the efficiency of the heat exchange can be improved.
There is an effect that a light source device with high cooling efficiency in the housing can be provided.

A light source device according to a fifth aspect of the present invention includes a light source that generates heat when emitting light, and a reflector that reflects light emitted from the light source in a substantially constant direction, wherein the reflector is made of a metal block. The metal block has a heat capacity capable of reducing a temperature rise of the light source by absorbing heat from the light source.

As a result, the configuration of the light source device can be further simplified as compared with the case where the configuration having the reflection function and the configuration having the heat sink function are separately provided.
In addition, this leads to simplification of the manufacturing process, so that there is an effect that manufacturing cost and material cost can be reduced.

Further, since the cooling can be performed by the natural heat radiation of the reflector, the problem of the noise caused by the cooling fan can be solved, and the configuration of the light source device can be further simplified.

A light source device according to a sixth aspect of the present invention includes a heat exchanging means connected to the reflector, and a heat radiating means connected to the heat exchanging means, and heat of the reflector is transmitted through the heat exchanging means. This is a configuration for conducting to the heat radiating means.

Thus, in addition to the effect of the fifth aspect, the heat of the reflector is conducted to the heat radiating means via the heat exchanging means, and the heat can be released more efficiently by the heat radiating means. Therefore, there is an effect that the temperature rise of the light source can be suppressed more efficiently.

A light source device according to a seventh aspect of the present invention is configured such that the light source and the reflector are disposed inside a closed casing, and the heat radiation means is disposed outside the casing. .

Thus, in addition to the effect of the configuration of claim 6, intrusion of dust and dust into the inside of the housing can be prevented. Therefore, the light source, the reflecting surface of the reflector,
And other optical components will not be stained, so there will be no performance degradation or deterioration of each component due to dirt.
There is an effect that a high-quality light source device can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a schematic configuration of a light source device for photographic printing according to an embodiment of the present invention.

FIG. 2A is a cross-sectional view illustrating a schematic configuration of a light source device for photographic printing according to another embodiment of the present invention, and FIG. 2B is a cross-sectional view of FIG. It is arrow sectional drawing which follows the X-ray.

FIG. 3 is a schematic view showing a schematic configuration of a conventional light source device for photoprinting.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light source unit 2 light source housing (housing) 3 heat pipe 6 halogen lamp (light source) 7 socket 8 heat sink 9 reflector 12 heat exchange pipe (heat exchange means) 13 radiator (heat dissipation means)

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazuya Tsukamoto 579-1 Umehara, Wakayama-shi, Wakayama Noritsu Koki Co., Ltd.

Claims (7)

[Claims] A light source that generates heat when emitting light; a housing that surrounds the entire light source; and a heat exchange unit that exchanges heat between the inside and the outside of the housing. A light source device, which is hermetically disposed inside a body. 2. The light source device according to claim 1, wherein said housing has a heat insulating function. 3. The light source device according to claim 1, wherein said heat exchange means is a member made of metal. 4. The light source device according to claim 1, wherein said heat exchange means is a heat pipe in which a refrigerant is sealed in a hollow pipe made of metal. 5. A light source that generates heat when emitting light, and a reflector that reflects light emitted from the light source in a substantially constant direction, wherein the reflector is formed of a metal block, and the metal block is configured to generate heat from the light source. A light source device having a heat capacity capable of reducing a rise in temperature of the light source by absorbing light. 6. A heat exchanging means connected to the reflector, and a heat radiating means connected to the heat exchanging means, wherein heat of the reflector is conducted to the heat radiating means via the heat exchanging means. The light source device according to claim 5. 7. The light source device according to claim 6, wherein said light source and said reflector are arranged inside a sealed housing, and said heat radiating means is arranged outside said housing. .