JP4695234B2 - Light source device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light source device used in an optical instrument such as a microscope or a measuring instrument.
[0002]
[Prior art]
Conventionally, a microscope having a lamp house is configured as shown in FIG. FIG. 7 shows an inverted microscope, in which a stage 2 on which a specimen 201 is placed is provided above the microscope body 1. In addition, a light projecting tube 3 having a diaphragm 4 is disposed behind the microscope body 1. The floodlight 3 is provided with a lamp house 5. The lamp house 5 includes a lamp 51. Light from the lamp 51 is collected by a collector lens (not shown) and is incident on the half mirror 6 disposed in the observation optical path through the diaphragm 4. The sample 201 on the stage 2 is irradiated with the reflected light through the objective lens 8 attached to the revolver 7. Then, the reflected light from the specimen 201 is reflected by the reflecting mirror 9 through the objective lens 8 and the half mirror 6, and the enlarged specimen image is observed from the eyepiece 11 through the lens barrel 10 arranged in front of the microscope body 1. It is possible.
[0003]
By the way, it is known that the heat generated from the lamp 51 is considerably high in the lamp house 5 used in such a microscope, and countermeasures against the heat are taken. FIG. 8 shows a schematic configuration of such a lamp house 5, which is disclosed in Japanese Utility Model Publication No. 7-40972.
[0004]
In this case, the lamp house 5 has an outer frame 501 and an inner frame 502, of which the outer frame 501 has openings 501 a and 501 b on the upper and lower surfaces, respectively, and the inner frame 502 accommodates the lamp 51. In addition, inclined plates 503 and 504 are provided so as to surround the lamp 51. When the light emitted from the lamp 51 is emitted from the heat ray absorption filter 505 along the optical axis to the light projecting tube 3 side, the light is converted into heat by the inclined plates 503 and 504, and the openings 501a to 501b. Natural convection is generated, and heat is radiated from the openings 501a and 501b to the outside.
[0005]
[Problems to be solved by the invention]
However, according to the microscope employing the light projecting tube 3 and the lamp house 5 as described above, the lamp house 5 has a configuration in which a large space is formed in each of the outer frame 501 and the inner frame 502 to dissipate heat generated by the lamp 51. Therefore, the external dimensions are large. Therefore, when such a lamp house 5 is used, the height dimension h of the lamp house 5 is increased as shown in FIG. 7, and the width dimension l including the floodlight 3 is also increased. When trying to install a microscope combined with a lamp house 5 on a desk or the like, there was a problem of occupying a very large installation space on the desk.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a light source device that can suppress temperature rise and that is compact.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is a first tubular hollow portion, a second tubular hollow member connected to one open end of the first tubular hollow member, and the first and second tubular hollow members. In the first and second tubular hollow members, the heat-insulating member sandwiched between the connecting portions of the first and second tubular hollow members is provided. A light source support member that emits light from the light source through the first tubular hollow member and the second tubular hollow member so as to extend from the outer peripheral portion of the second tubular hollow member to the other opening end side of the first tubular hollow member The first cover member is provided on the outer peripheral portion of the hollow member and is formed so as to cover the outer periphery of the first tubular hollow member with an air layer interposed therebetween.
[0007]
According to a second aspect of the present invention, in the first aspect of the invention, the second cover member is disposed so as to be fixed to the light source support member and surround the light source support member via an air layer. It is a feature.
According to a third aspect of the present invention, in the second aspect of the invention, the second cover member, together with the light source support member, surrounds the first cover member excluding the lower surface of the first cover member. It is characterized by being provided so as to cover.
[0008]
As a result, according to the first aspect of the present invention, by interposing the heat insulating member between the first and second tubular hollow members constituting the light projecting tube, heat generated from the light source is transmitted through the light projecting tube. It can be prevented from affecting others. Also, a cover member provided on the second tubular hollow member is disposed so that the light source of the light source support member surrounds the first tubular hollow member disposed on the optical axis inside the light source through an air layer. As a result, the surface temperature of the cover member can be greatly reduced.
[0009]
According to the invention described in claim 2, since the periphery of the light source support member is further surrounded by the cover member via the air layer, the surface temperature of the light source support member itself can be lowered.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 shows a schematic configuration of an inverted microscope using the light source device according to the first embodiment of the present invention. In the figure, reference numeral 21 denotes a microscope body, and a stage 22 on which a specimen 221 is placed is integrally attached above the microscope body 21 with screws or the like. A light source device 23 is provided behind the microscope main body 21.
[0011]
The light source device 23 includes an incident light projection tube 24 and a lamp socket 25 that can be attached to and detached from the incident light projection tube 24.
As shown in FIG. 2, the epi-illumination projection tube 24 includes tubular hollow members 241, 242, and 243 made of an aluminum material and disposed in the optical axis direction. Among these members, the hollow member 241 has a flange 241a and is directly fixed to the microscope main body 21 by the flange 241a. Further, the hollow member 241 is provided with a brightness stop 26 on the optical axis. The brightness diaphragm 26 can adjust the amount of light on the optical axis by rotating the lever around the optical axis. Reference numeral 218 denotes a volume for adjusting the light amount of the lamp.
[0012]
The hollow member 242 is integrally connected to the hollow member 241 with a screw or the like, and the frost 27 is provided on the optical axis of the connecting portion with the hollow member 241. The frost 27 distributes the concentration of the illumination field in the illumination system.
[0013]
The hollow member 243 is detachably attached to the lamp socket 25 as a light source support member, and is fixed to the hollow member 242 via a cylindrical heat insulating member 28 that is hollowed out. For this heat insulating member 28, for example, a resin material or the like is used which has a higher heat insulating effect than a normal material and is not completely heat insulating. As the resin material, thermosetting and thermoplastic resins are conceivable, and in the present invention, a phenol resin is combined. Further, the hollow member 243 is provided with a collector lens 29 on the optical axis at the end portion on the heat insulating member 28 side.
[0014]
The cover member 30 is arranged so as to surround the hollow member 243 and the lamp socket 25 described later. The cover member 30 has a cylindrical shape such as an aluminum material. One end of the cover member 30 is fixed to the hollow member 242 with a screw or the like, and the hollow member 243 and the lamp socket 25 are surrounded by an air layer 31 having a predetermined thickness. To surround. Further, the cover member 30 forms an elongated notch 301 for passing a power cord 37 from a lamp socket 25 described later.
[0015]
As shown in FIG. 3, the lamp socket 25 has a lamp seat 32 protruding from the front surface of the socket body 251. A lamp 33 as a light source is provided upright on the lamp seat 32, and a reflector 34 for preventing light leakage to the rear of the lamp 33 is provided on the back of the lamp 33. The lamp seat 32 is connected to an external terminal 36 protruding from the front surface of the socket body 251 through a lead wire 35. A power cord 37 is connected to the external terminal 36, and the power cord 37 is led out to the outside through the notch 301 of the cover member 30 described above.
[0016]
A pair of lamp positioning bars 41 protrude from the front surface of the socket body 251 so as to sandwich the lamp 33 on the lamp seat 32. These lamp positioning bars 41 are used to position the lamp 33 on the optical axis inside the hollow member 243 when the lamp socket 25 is attached to the incident light projection tube 24.
[0017]
Reference numeral 38 denotes a rear cover provided on the rear surface of the socket body 251. The rear cover 38 has a large number of slit holes 381 formed on the back surface thereof.
Then, the light from the lamp 33 of the lamp socket 25 of the light source device 23 configured as described above is collected by the collector lens 29 in the hollow member 243 of the incident light projection tube 24, and the frost 27 on the optical axis of the hollow member 242 is collected. Then, the light is incident on the half mirror 211 inside the microscope main body 21 through the brightness stop 26 on the optical axis of the hollow member 241, and the reflected light here is on the stage 22 through the objective lens 213 mounted on the revolver 212. The specimen 221 is irradiated. Then, the reflected light from the specimen 221 is reflected by the reflection mirror 214 via the objective lens 213 and the half mirror 211, and is enlarged from the eyepiece lens 216 via the optical axis branching prism of the lens barrel 215 arranged in front of the microscope body 21. The specimen image can be observed.
[0018]
In this case, the objective lens 213 on the optical axis is switched by rotating the revolver 212 to enable magnification conversion, and the revolver 212 is moved up and down by rotating the focusing handle 217 provided in front of the microscope body 21. It can be moved.
[0019]
Next, the operation of the inverted microscope configured as described above will be described.
In this case, when light is emitted from the lamp 33 of the lamp socket 25 of the light source device 23, the light enters the half mirror 211 inside the microscope body 21 through the collector lens 29, the frost 27, and the brightness stop 26 of the incident light projection tube 24. Then, the reflected light here is applied to the specimen 221 on the stage 22 via the objective lens 213, and the reflected light from the specimen 221 is reflected by the reflective mirror 214 via the objective lens 213 and the half mirror 211, An enlarged specimen image is observed from the eyepiece lens 216 through the lens barrel 215 in front of the microscope main body 21.
[0020]
In this case, there are light emitted from the lamp 33 that acts as illumination light via the collector lens 29 and light that is absorbed by members around the lamp 33 and converted into heat. Among these, for the latter heat conversion, the hollow member 243 of the epi-illumination projection tube 24 is directly warmed by the radiant heat of the lamp 33. If the output of the lamp 33 is 30 W, the experimental value shows that the inside of the hollow member 243 When the reference temperature is converted to 40 ° C. at point a in FIG. 2, it becomes 110 ° C. , and at point b on the outer surface of the hollow member 243, the thickness of the hollow member 243 is thickened and a thermal gradient is applied. When the reference temperature is converted to 40 ° C., it becomes about 90 ° C.
[0021]
In this case, the heat of the hollow member 243 is transmitted to the heat insulating member 28 between the hollow member 242, but since the heat insulating member 28 at this time cannot be expected to have a high heat insulating effect, it is also transmitted to the hollow member 242, and further the microscope main body. Even 21 is transmitted. However, the heat conduction to the hollow member 242 side heat insulating effect in the heat insulating member 28, since the greatly suppressed crucified, influence of heat on the microscope main body 21 can be avoided, on the contrary, the hollow member 243 heat By conveying a part to the microscope main body 21 side, concentration of heat in the hollow member 243 can be avoided. On the other hand, since the cover member 30 disposed around the hollow member 243 is fixed to the hollow member 242 connected to the hollow member 243 via the heat insulating member 28, the cover member 30 has a surface c at the point c. The temperature is about 65 ° C. when the reference temperature is 40 ° C. At this time, since the air layer 31 is provided between the cover member 30 and the hollow member 243 so that an inexpensive and effective heat insulating effect can be obtained by using a heat insulating material such as resin, the heat of the hollow member 243 can be reduced. A temperature lower than that of the hollow member 243 is maintained without being affected.
[0022]
Therefore, in this case, the heat distribution around the lamp 33 in the lamp socket 25 is such that the hollow member 243 of the incident light projection tube 24 close to the lamp 33 as a heat source is at a high temperature, but the heat insulating member is added to the hollow member 243. In the hollow member 242 connected via 28, heat conduction is suppressed and a low temperature can be maintained, so that the influence of heat on the microscope body 21 can be avoided. In addition, the cover member 30 disposed so as to surround the periphery of the hollow member 243 of the epi-illumination projection tube 24 directly affects the influence of heat from the hollow member 243 by interposing the air layer 31 between the cover member 30 and the hollow member 243. since the received not so, compared to the surface temperature of the hollow member 243 can maintain a much lower surface temperatures, further, the circumferential surface of the lamp socket 25 is a temperature rise due to heat generation of the lamp 33, the reference When the temperature is converted to 40 ° C., the temperature becomes as high as 100 ° C. However, since it is surrounded by the cover member 30 whose surface temperature is kept low, safety can be ensured. As a result, the lamp socket 25 can be made compact including the surrounding structure. Therefore, the lamp socket 25 has a higher height than the conventional combination of the projector tube and the lamp house shown in FIG. The height dimension H and the width dimension L including the epi-illumination projection tube 24 can be reduced. When a microscope combined with such a lamp socket 25 is installed on a desk or the like, the space on the desk can be used effectively.
Second Embodiment FIG. 4 is a schematic configuration diagram of an inverted microscope using a light source device according to a second embodiment of the present invention, FIG. 5 is a side sectional view of an epi-projector, and FIG. FIG. 4 is a side sectional view of a lamp socket, and the same reference numerals are given to the same parts as those in FIGS. 1 to 3 described above.
[0023]
By the way, as described in the first embodiment, in the lamp socket 25, the upper surface, the lower surface, the side surface and the rear cover 38 of the socket body 251 are heated by the heat of the lamp 33, and the reference temperature is set to 40 ° C. In terms of conversion, the temperature is as high as 100 ° C.
[0024]
Therefore, in the second embodiment, the socket body 251 is surrounded by the socket cover 39 with the air layer 40 interposed therebetween except for the front surface and the lower surface of the socket body 251. In this case, the socket cover 39 has a two-divided structure of the upper cover 391 and the lower cover 392, but is substantially an integral structure. In addition, the socket cover 39 has a large number of slit holes 39 a formed on the back surfaces of the upper cover 391 and the lower cover 392. Further, the socket cover 39 has an inclined surface 391a formed on the upper surface of the upper cover 391. When a part such as a cord is temporarily placed on the upper surface of the upper cover 391, the socket cover 39 slides down on the inclined surface 391a.
[0025]
The socket cover 39 is fixed to the socket body 251 of the lamp socket 25. In this state, the socket cover 39 is accommodated together with the lamp socket 25 except for the lower surface of the cover member 30. .
[0026]
Accordingly, since the periphery of the lamp socket 25 including the rear cover 392 of the lamp socket 25 is surrounded by the socket cover 39 with the air layer 40 interposed therebetween, the surface temperature of the lamp socket 25 is lowered. It is possible to secure safety. Incidentally, the heat insulating effect of the socket cover 39, is about 50 ° C. hereinafter the upper surface of the socket cover 39, the reference temperature at the side and rear faces converted as 40 ° C..
[0027]
In the above-described embodiment, the lamp socket 25 is a type that can be attached to and detached from the epi-illumination projection tube 24, but it can also be applied to a type in which only the lamp 33 is attached and detached. In addition, each temperature value described in the above-described embodiment is an experimental result of one form, and each numerical value is a relative comparison. The measurement environment, the capacity of the lamp 33, the incident light projection tube, and the like. The numerical value varies depending on the material of 24, the diameter, the material of the heat insulating member 28, and the like. Furthermore, even if it is the same structure, changing the surface member to a resin material or the like changes the degree of sensory heat. Furthermore, the shape of the socket cover 39 of the lamp socket 25 is not particularly required to have an oblique upper surface, and may be flat. The lamp socket 25 and the epi-illumination projection tube 24 do not necessarily need to be combined in pairs. For example, the function as the epi-illumination projection tube 24 is provided in the microscope main body 21 and is directly combined for transmission illumination of the microscope. You can also. Further, although there is no particular mention regarding the power source of the lamp 33, a built-in / external power source for the microscope body 21 can be considered. Use of an external power supply is advantageous in suppressing heat generation. Furthermore, the epi-illumination projection tube 24 is composed of hollow members 241, 242, and 243 arranged in parallel in the optical axis direction. These hollow members 241, 242, and 243 are round if they are of a tube type, Shapes such as corners can be easily considered. Further, the heat insulating member 28 is not a cylindrical shape hollowed out, and can be easily configured, for example, by inserting only a screw portion for fixing the hollow members 243 and 242 as a spacer. In the above-described embodiment, an example in which the present invention is consistently applied to an inverted microscope has been described. However, the present invention can also be applied as a light source device such as an upright microscope or another optical apparatus.
[0028]
【The invention's effect】
As described above, according to the present invention, it is possible to prevent the heat generated from the light source from affecting the other through the projector tube, and to increase the ambient temperature of the light source support member and the projector tube that support the light source. It is possible to achieve compactness by suppressing.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of a first embodiment of the present invention.
FIG. 2 is a side sectional view showing a schematic configuration of an epi-illumination projection tube used in the first embodiment.
FIG. 3 is a side sectional view showing a schematic configuration of a lamp socket used in the first embodiment.
FIG. 4 is a diagram showing a schematic configuration of a second embodiment of the present invention.
FIG. 5 is a side sectional view showing a schematic configuration of an epi-illumination projection tube used in the second embodiment.
FIG. 6 is a side sectional view showing a schematic configuration of a lamp socket used in the second embodiment.
FIG. 7 is a diagram showing a schematic configuration of an inverted microscope using a conventional light source device.
FIG. 8 is a diagram showing a schematic configuration of an example of a conventional light source device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 21 ... Microscope main body 22 ... Stage 23 ... Light source device 24 ... Incident light projection tube 25 ... Lamp socket 26 ... Brightness stop 27 ... Frost 28 ... Heat insulation member 29 ... Collector lens 30 ... Cover member 301 ... Notch part 31 ... Air layer 32 ... Lamp seat 33 ... Lamp 34 ... Reflector 35 ... Lead wire 36 ... External terminal 37 ... Power cord 41 ... Lamp positioning bar 38 ... Rear cover 381 ... Slit hole 39 ... Socket cover 391 ... Upper cover 392 ... Lower cover 39a ... slit hole 391a ... inclined surface 40 ... air layer 211 ... half mirror 212 ... revolver 213 ... objective lens 214 ... reflection mirror 215 ... lens barrel 216 ... eyepiece lens 217 ... semi-focus handle 218 ... volume 221 ... sample 241.242 243 ... Hollow member 241a ... Flange 251 ... Socket body

Claims (3)

A first tubular hollow;
A second tubular hollow member coupled to one open end of the first tubular hollow member;
A heat insulating member sandwiched between the connecting portions of the first and second tubular hollow members;
A light source support member that includes a light source therein, is disposed at the other opening end of the first tubular hollow member, and emits light from the light source through the hollow portions of the first and second tubular hollow members;
The second tubular hollow member is provided on the outer peripheral portion of the second tubular hollow member so as to extend from the outer peripheral portion of the second tubular hollow member to the other opening end side of the first tubular hollow member. a first cover member formed to cover the outer periphery of the first tubular hollow member,
A light source device comprising: The light source device according to claim 1, wherein a second cover member is disposed so as to be fixed to the light source support member and surround the light source support member via an air layer. 3. The light source device according to claim 2, wherein the second cover member is provided so as to cover the periphery of the first cover member excluding the lower surface of the first cover member together with the light source support member.

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