JP2007140298A - X-ray film viewer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an X-ray film viewer which has high illuminance only in the attachment range of a radiogram to be interpretated and can irradiate homogeneous light without luminance unevenness by using a white light-emitting diode LED as a light source. <P>SOLUTION: In the medical X-ray film viewer in which the light source is arranged in a box-like housing and which irradiates the radiogram to be interpretated with light through at least two filters, to see through the radiogram to be interpretated, the light source is a planar light source configured in such a manner that a plurality of LEDs are disposed on a substrate, a first partition body is hangingly provided on the planar light source, so as to partition the planar light source, and on the upper surface of the filter other than the foremost filter, a second partition body is hangingly provided while coinciding with the first partition body. The X-ray film viewer has a sensor for detecting the position of the radiogram to be interpretated which is provided in the gap between the frame portion of the housing and the foremost filter on which the radiogram to be interpretated is placed and can specify the attachment range of the radiogram to be interpretated and a control section which turns on the planar light source in a partition coincident with the attachment range of the radiogram to be interpretated detected by the sensor for detecting the position of the radiogram to be interpretated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a Caucusten that sees an object to be read through, and in particular, the light source is a planar light source in which a plurality of LEDs emitting white light with a single element are arranged on a substrate, and at least between the LED and the object to be read. The present invention relates to a Schausten that has no luminance unevenness by interposing two filters and that is less affected by heat on an object to be read.

  Conventionally, in order to observe an image on a negative or photographic film taken with X-rays, it is necessary to allow the object to be read such as film or negative to see through the light of the sun or lighting. Several inventions relating to an apparatus for irradiating light on an object to be read are disclosed.

For example, Patent Document 1 includes a white LED light source arranged in a flat shape under the name of “dental lighting and monitoring device”, and this light source can be switched to each function of shaw casten lighting, surgical light, and monitor. An invention relating to dental lighting and a monitoring device is disclosed.
According to the present invention, conventionally, it is possible to consolidate the Schaukasten lighting, the surgical light, and the monitor separately installed as medical equipment into one device, and each function can be individually provided by providing a switching mechanism to each function. It is available for use.
Further, by using a white LED as a light source, a light source with high brightness, low heat generation, and long life can be realized. Furthermore, by using a white LED, light having a desired illuminance can be provided with less power.

Further, Patent Document 2 has the name “Shakasten”, which can easily and accurately interpret image information that is difficult to discriminate with only white illumination light, and also causes fatigue of the interpreter's eyes caused by a monochrome contrast screen. An invention relating to an image interpretation device that can be reduced to prevent misdiagnosis and oversight to improve work efficiency is disclosed.
The “Shakasten” according to the present invention can replace the light source with a white LED. Further, the screen of “Shercus Ten” according to the present invention is divided into a plurality of areas, and the light sources arranged corresponding to the respective areas can be independently controlled, and further, the range for mounting the film to be read is specified. By providing the sensor, it is possible to irradiate light only to the mounting range of the film to be read.
Also in the “Shakasten” according to the present invention, a light source having high luminance, low heat generation, and long life can be realized as in the case of Patent Document 1. Furthermore, by using a white LED, light having a desired illuminance can be provided with less power.

Japanese Patent Laid-Open No. 10-165423 JP 2000-241749 A

However, in the conventional “dental illumination and monitoring device” as disclosed in Patent Document 1 described above, the light source in which the white LEDs are arranged in a flat plate shape does not include a filter. When used for interpretation of film, negatives, etc., it was necessary to directly hold the film, negative, etc., which is the object to be read, over a white LED that is bare.
In general, an LED as a light source has advantages of high brightness, low heat generation, and long life compared to conventional halogen lamps and fluorescent lamps, but has a strong light directivity and a large number of LEDs arranged at high density. However, light between adjacent LEDs hardly interferes in the vicinity of the light emitting portion of the LED.
For this reason, when the object to be read is directly held over a white LED light source that does not have a filter, the object to be read is irradiated with light with uneven brightness, and the contents of the object to be read can be accurately projected. There was a problem that it was not possible.
In addition, in the present invention, since it does not have a function of irradiating light only to the attachment range of the object to be read, when the light source protrudes from the object to be read, the operator directly looks at the LED light source and is dazzling. Not only was it difficult to work, it could also have an adverse effect on the eyes of the workers.

Further, although the “Shakasten” light source disclosed in Patent Document 2 includes a screen that also serves as a diffuser filter, it is possible that a single screen cannot sufficiently diffuse the light of a highly directional LED as in the case of the present invention. There was sex.
That is, as described above, the light emitted from the LEDs has particularly strong directivity, and light between adjacent LEDs hardly interferes in the vicinity of the light emitting portion.
For this reason, in order to disperse the light emitted from the LEDs uniformly without causing uneven brightness on a single screen, the screens are arranged sufficiently away from the light source, and the lights of adjacent LEDs interfere with each other. If the screen is configured so that light is incident on the screen, or if the screen is arranged near the light emitting part of the LED, the screen is made of a special material, or special irregularities are applied to the surface of the screen. There was a need.
However, when the screen is arranged at a position sufficiently away from the light source, there has been a problem that the distance from the light source to the screen becomes large, and the apparatus itself becomes large. Further, in this case, since the screen is disposed at a position away from the light source, there is a problem that a decrease in illuminance is unavoidable.
Furthermore, when a special material is used for the material of the screen or when the screen is subjected to special processing, there is a problem that the screen is expensive to manufacture and the apparatus itself is expensive.
In addition, when the light diffusibility of one screen is extremely increased or the thickness is increased, there is a problem in that a decrease in illuminance on the screen surface is unavoidable.
On the other hand, it may be possible to install a screen in the vicinity of the light emitting portion of the LED by using a diffusion type LED having a weak directivity as the light source of the present invention, but such a diffusion type LED emits light. The brightness of the central part and the side part of the light emitted from the part tends to be different, and if only one screen is provided between the film to be read and the light source, there is a possibility that luminance unevenness occurs on the screen.
In addition, in the “Shakasten” according to the present invention, there is no technical reference or suggestion regarding the positional relationship between the partition plate that partitions the housing and the screen. For example, the film to be read in a state where the partition plate is in contact with the screen. When light is irradiated, there is also a problem that a linear shadow is generated at the contact portion of the partition plate and uniform light cannot be provided on the screen.

  The present invention has been made in response to such a conventional situation, and an object of the present invention is to use an LED as a light source, irradiate the object to be read with uniform light having high illuminance and no unevenness of brightness, and further to the object to be read. An object of the present invention is to provide a shaukasten that can irradiate light only to the mounting range of the.

According to the first aspect of the present invention, a light source is disposed inside a box-shaped housing, a filter disposed in the vicinity of the light source is a first filter, and a filter that contacts an object to be read is a first filter. 2 is a medical Schausten that irradiates light to an object to be read through at least two filters as two filters and sees the object to be read through, and the light source is a white light emitting diode (hereinafter referred to as LED). Is a planar light source disposed on a plurality of substrates, and the planar light source has a first partition body suspended from the first filter so as to partition the planar light source. In the filter including the filter, the second partition body is suspended while being coincident with the first partition body, and the second partition body is suspended so as not to contact the second filter. Is.
In the Schaukasten having the above-described configuration, the planar light source has an effect of irradiating the object to be read with stable white light having high illuminance and less flicker than incandescent bulbs and fluorescent lamps using conventional filaments. Further, the first and second partitions have an effect of preventing the light emitted from the LEDs from being diffused in the horizontal direction.
Furthermore, since the second filter and the second partition are arranged in a non-contact manner, it has an effect of preventing the shadow of the second partition from appearing on the upper surface of the filter on which the object to be read is placed.

According to a second aspect of the present invention, there is provided the Caucus ten according to the first aspect, wherein the first partition and the second partition are integrally formed through a filter including the first filter. It is characterized by that.
The Schaukasten having the above-described configuration has an effect of more effectively preventing light emitted from the LED from diffusing outside the compartments of the first and second partitions.

According to a third aspect of the present invention, there is provided a shaucus ten according to the first or second aspect of the present invention, which is provided in a gap between the frame portion of the housing and the second filter on which the object to be read is placed. A sensor for detecting the position of the object to be read, which can specify the mounting range of the object to be read, and a control unit for turning on the surface light source in the section matching the mounting range of the object to be read detected by the sensor for detecting the position of the object to be read It is characterized by having.
In addition to the operation of the shaucus ten according to the first or second aspect, the sensor for detecting the position of the object to be read has an action of specifying the mounting range of the object to be read. It has the effect | action of lighting the planar light source in the division corresponding to a mounting range.

According to a fourth aspect of the present invention, there is provided the Caucus Ten according to the third aspect, wherein the planar light source is partitioned by the first partitioning body and accommodates a single LED. A second control section that is partitioned by one partition and accommodates a plurality of LEDs, and the length of the long side in the second control section is substantially the same as the minimum value of the width or length of the object to be read. It is characterized by being.
The shaucusten having the above-described structure has the same action as the shaukasten described in claim 3.

According to the fifth aspect of the present invention, a light source is arranged inside a box-shaped housing, and light is irradiated to an object to be read from at least the first filter and the second filter from the outside of the housing. And a light source is a planar light source in which LEDs are arranged on a plurality of substrates, and the first filter is provided in the gap between the first filter and the second filter. A light-shielding body that covers the light-shielding body, a drive mechanism that drives the light-shielding body, and a cover that is provided in a gap between the frame portion of the housing and the first filter on which the object to be read is placed and that can specify the mounting range of the object to be read. An interpretation object position detection sensor, and a control unit that operates the drive mechanism so as to cover the first filter outside the attachment range of the interpretation object detected by the interpretation object position detection sensor with a light shielding body. It is characterized by this.
In the Schaukasten having the above-described configuration, the planar light source has an effect of irradiating the object to be read with stable white light having high illuminance and less flickering than incandescent bulbs and fluorescent lamps using conventional filaments. In addition, the sensor for detecting the position of the object to be read has an effect of specifying the mounting range of the object to be read, and the drive mechanism has an effect of arranging the light shielding body on the lower surface side of the first filter other than the mounting range of the object to be read. Have

According to a sixth aspect of the present invention, there is provided a Caucus ten according to any one of the first to fifth aspects, wherein the substrate or the LED includes a reflector.
In addition to the operation of the shaucus ten according to any one of claims 1 to 5, the reflector has the function of reflecting light leaking to the rear of the LED toward the object to be read.

According to a seventh aspect of the present invention, there is provided the Caucus Ten according to any one of the first to sixth aspects, wherein the LED has a light emission wavelength greater than 390 nm. Is.
In addition to the action of the shaucusten according to any one of claims 1 to 6, the LED has the action of not emitting harmful ultraviolet rays to the human body.

The present invention according to an eighth aspect is the present invention according to any one of the first to sixth aspects, wherein at least one of the filters including the LED or the first and second filters. The filter is provided with an ultraviolet removing filter that cuts ultraviolet rays having a wavelength of 390 nm or less.
In addition to the operation of the shaucusten according to any one of claims 1 to 6, the shaucusten having the above-described configuration is configured to prevent the ultraviolet rays from reaching the object to be read when ultraviolet rays of 390 nm or less are emitted from the LEDs. Has the effect of blocking.

According to the first aspect of the present invention, by using an LED as a light source, the light source can have a high illuminance, a long life, and a low heat generation. For this reason, the shaw casten according to the present invention uses an LED as a light source, for example, requires less power to obtain a desired illuminance than a fluorescent or incandescent lamp, and has a long life as a light source. Running costs can be reduced. Furthermore, since the light source has a low heat generation, it is possible to prevent the read object from being denatured or deteriorated by the emitted light when the object is irradiated with light.
Further, by interposing at least two filters including the first and second filters, the light emitted from the LED can be sufficiently diffused even when the second filter is disposed in the vicinity of the LED. Can do. That is, light that is not sufficiently diffused by the second filter can be diffused by a distance to another filter other than the second filter, and at the same time, can be diffused by another filter other than the second filter. Even strong light can be diffused sufficiently.
In addition, since the surface of the second filter in contact with the object to be read can be irradiated with uniform light without uneven brightness, the first filter can be installed in the vicinity of the planar light source. Thus, the thickness of the shaukasten itself can be reduced.
In addition, since the object to be read is irradiated with uniform light, the image reader can accurately read the content displayed on the object to be read.
Furthermore, when the LED at a desired position is turned on in the planar light source partitioned by the first partition by including the first and second partitions, the LED lighting portion on the second filter It is possible to irradiate uniform light without uneven brightness while keeping the boundary of the extinguished part clear.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, the first partition body and the second partition body pass through a filter other than the second filter. Since they are formed integrally, when light emitted from the LED passes through a filter other than the second filter, the light diffuses in the plane direction inside the filter medium, and the light is emitted outside the second partition. Leakage can be prevented. For this reason, the boundary between the lighted part and the lighted part can be kept clearer than the invention according to the first aspect.

  In addition to the effects of the invention described in claim 1 or 2, the shaukasten which is the invention described in claim 3 of the present invention irradiates uniform light with no luminance unevenness only in the mounting range of the object to be read. Can do. For this reason, there is no fear of light leaking outside the reading object mounting range, and the possibility that the image reader misreads the content displayed on the reading object due to dazzling light leaking outside the reading object mounting range is reduced. . Therefore, the possibility of misdiagnosis due to misreading of the object to be read is also reduced.

  The present invention according to claim 4 of the present invention has the first and second control sections in addition to the effect of the invention according to claim 3, thereby minimizing the number of sections that need to be controlled. be able to. For this reason, the number of wirings for controlling the turning on / off of the LED can be minimized, and the materials necessary for forming the first and second partitions can be saved.

  According to the fifth aspect of the present invention, the shaucusten is a uniform light having no luminance unevenness only in the mounting range of the object to be read, while keeping the boundary between the light-irradiated portion and the light-shielded portion clear. Can be irradiated. For this reason, the same effect as the invention according to claim 3 is exhibited.

  According to the sixth aspect of the present invention, in addition to the effects of the first to fifth aspects of the invention, the shaukasten is provided with a reflector so that light leaking behind the LED is directed to the object to be read. Can be reflected. For this reason, the light emitted from the LED can be used efficiently without being attenuated in the housing according to the present invention, and the object to be read can be irradiated with light with high illuminance. Further, by providing the reflector, it is possible to reduce the amount of power consumption required to obtain a desired illuminance.

  In addition to the effects of the inventions according to claims 1 to 6, the shaukasten according to claim 7 of the present invention does not emit ultraviolet rays harmful to the human body from the light source, so that the reader may be exposed. Even when used for a long time in the present invention, it is safe.

  In addition to the effects of the inventions described in claims 1 to 6, the shaukasten according to the invention described in claim 8 of the present invention has an ultraviolet filter that removes the ultraviolet rays even when harmful UV rays are generated from the light source. Since it is cut, ultraviolet rays do not reach the object to be read and it is safe because there is no fear of the reader being exposed to the ultraviolet rays.

  [1] The shaw casten according to the first embodiment of the present invention will be described below with reference to FIGS. (Mainly corresponding to claims 1 to 4 and claims 6 to 8)

FIG. 1 is a perspective view showing a part of the shaw casten according to the first embodiment of the present invention.
As shown in FIG. 1, the shaw casten 1a _{1 according} to the first embodiment of the present invention has a plurality of LEDs 4 on a substrate 5 in a housing formed by a frame 2 and a bottom plate 7 covering the bottom thereof. The arranged planar light source 10a is accommodated, and on the planar light source 10a, two diffused filters 3a and 3b are provided at a distance from each other while maintaining a space without contacting each other. In addition, the 1st, 2nd filter of Claim 1 respond | corresponds to the diffuser filters 3b and 3a which concern on this Embodiment, respectively.
In addition, a partition 12a ₁ that forms a grid-like section is provided on the substrate 5 of the planar light source 10a, and the partition formed by the diffuser filters 3a and 3b is aligned with the partition 12a ₁ while being partitioned. 12a ₂ is provided.
Further, a pressing member 6 made of an elastic body such as a curved leaf spring is provided on the lower surface side of the frame 2 facing the outer edge of the scattering filter 3a, and the gap between the pressing member 6 and the scattering filter 3a is covered. The interpretation object 8 can be inserted.
Further, the surface of the substrate 5 has a surface made of a metal thin film provided with reflectors 9a ₁ of the mirror surface, light reflected on the substrate 5 side by the light or scattered light filter 3b leaking rearward from LED4 is reflector 9a ₁ is reflected again to the diffuser filter 3b side. Thus, the reflector 9a ₁ by providing the, by preventing heat generation and light attenuation in constructed housing frame 2 and the bottom plate 7, can increase the illuminance on the upper surface of the diffuser filter 3a.

A mechanism in which light is diffused in the shaukasten 1a _{1 according} to the present embodiment will be described.
FIG. 2A is a conceptual diagram showing how light from adjacent LEDs interfere with each other, and FIG. 2B is a partial cross-sectional view taken along line AA in FIG. In addition, the same code | symbol is attached | subjected about the part same as what was described in FIG. 1, and the description about the structure is abbreviate | omitted.
In general, LEDs have the advantages of low power consumption and high brightness, and a small amount of heat generated during light emission, but have a problem that light directivity is strong and scattering is difficult.
As shown in FIG. 2A, the light emitted from the LED 4 disposed on the substrate 5 is diffused in a range of approximately 20 ° to 60 ° from the light emitting chip, that is, the range indicated by the symbol C in the drawing. ing. For this reason, the lights emitted from the LEDs 4 do not interfere with each other in the vicinity of the light emitting surface D, but interfere with each other for the first time at a position E away from the light emitting surface D.
Therefore, if only one scattering filter is covered in the space F in which the lights of the adjacent LEDs 4 do not interfere with each other, the light is not sufficiently diffused, causing luminance unevenness on the filter surface.
Therefore, in the present embodiment, at least two diffused filters 3a and 3b are interposed in parallel between the light emitting surface of the planar light source 10a and the object to be read 8, as shown in FIG. By providing the space 11 in the space 11, the light whose directionality is weakened by the first filter 3 b is diffused by the space 11 and the second filter, even if the first diffuser filter 3 b does not sufficiently diffuse the light. Is possible. Accordingly, it is possible to realize the Schaukasten 1a ₁ that can sufficiently diffuse the light emitted from the LED 4 and has high illuminance on the diffuser filter 3a on which the object to be read is placed.

A mechanism in which light emitted from the LED 4 is diffused by the two diffuser filters 3a and 3b will be described.
Light that is a wave has a property of being reflected or refracted at the boundary between two media when traveling from one medium to another. For this reason, the more the boundary between the medium and the medium, the more times the light is reflected or refracted, and the light is diffused.
That is, the present invention pays attention to the physical characteristics of such light, and increases the number of times the light emitted from the LED 4 is reflected or refracted before reaching the surface of the diffuser filter 3a, thereby reducing the scattered light. It is something that encourages.
As shown in FIG. 2B, when the diffuser filters 3a and 3b are covered in parallel to the upper surface side of the planar light source 10a and a space 11 is provided between them, the light emitted from the LED 4 is diffused by the diffuser filter 3a. Before reaching the upper surface of the diffuser filter 3b, the upper surface H of the diffuser filter 3b, the bottom surface I of the diffuser filter 3a, and the upper surface J of the diffuser filter 3a are refracted sequentially, and at the same time, the diffuser filter 3b and the reflector 9a. _{In the} space formed by ₁ and the space 11 formed by the diffuser filters 3a and 3b, part of the light emitted from the LED 4 diffuses while repeating reflection.
In addition, also in the diffuser filters 3a and 3b, light diffusion occurs when light collides with molecules of the material forming the diffuser filters 3a and 3b.
In this way, the surface light source 10a is emitted from the LED 4 by covering at least two light-diffusing filters 3 having relatively high light transmittance, which causes uneven brightness in one sheet, in parallel while providing the space 11. The light is diffused while being repeatedly refracted and reflected, and further diffused by colliding with the molecules in the medium constituting the diffuser filters 3a and 3b. In addition, light with high illuminance is irradiated.

Further, in the light box 1a ₁ of the above configuration, it is possible to diffuse in the case of arranging the diffuser filter 3 also sufficiently light in the vicinity of the surface light source 10a, a light box 1a ₁ of the thickness, i.e., diffuse light filter from the bottom plate 7 The distance up to 3a can be reduced. For this reason, the shaucus ten 1a ₁ can be made compact.
Also, since the two light-diffusing filters 3a and 3b and the space 11 are provided between the planar light source 10a and the object to be read 8, the light emission heat of the LED 4 is originally small, but the LED 4 should be Even if heat is generated, heat is not easily transmitted to the object to be read 8 on the surface of the diffuser filter 3a, and there is no concern that the object to be read 8 is denatured by the light emitted from the light source. Further, the two light diffusion filters 3a and 3b are hardly denatured. In particular, in order to reduce heat transfer between the two diffuser filters 3a and 3b, the space 11 between the diffuser filters 3a and 3b may be evacuated.

Further, as shown in FIG. 2B, the shaucus tena 1a ₁ according to the present embodiment includes a partition 12a ₁ between the substrate 5 and the diffuser filter 3b, and a partition 12a ₂ on the diffuser filter 3a. Thus, the light emitted from the LED 4 is prevented from diffusing outside the section formed by the partitions 12a ₁ and 12a ₂ . For this reason, in the shaukasten 1a ₁ , it becomes possible to diffuse light only in a compartment that accommodates an arbitrary LED 4 partitioned by the partition 12a ₁ , and a section in which the LED 4 is lit on the upper surface of the diffuser filter 3a It is possible to clarify the boundary of the partitioning area.
Each of the partitions 12a ₁ and 12a ₂ as described above is composed of the metal thin film 12b and the support material 12c, and is provided with the metal thin film 12b so that it is refracted or reflected at the boundary surfaces H and G of the diffuser filter 3b. When the light reaches the partitions 12a ₁ and 12a ₂ , the light is reflected on the surface of the metal thin film 12b and is directed again toward the object to be read 8 side.
Therefore, the light emitted from the LED 4 is prevented from being attenuated inside the housing, and the illuminance on the surface of the diffuser filter 3a is prevented from decreasing.

In addition, as shown in FIG. 2B, the partition 12a ₁ suspended from the substrate 5 is in contact with the lower surface G of the diffuser filter 3b, whereas it is suspended from the upper surface of the diffuser filter 3b. The partition 12a ₂ to be formed is configured to be in non-contact with the lower surface I of the diffuser filter 3a, and has a gap B _{1 in} this portion.
This, if allowed to contact the upper portion of the partition member 12a ₂ on the lower surface I of the diffuser filter 3a, and is projected on the surface J of the diffuser filter 3a and the abutment face of the partition member 12a ₂ is a linear shadow This is to prevent this.
In this way, by providing the gap B ₁ between the partition 12a ₂ and the lower surface I of the diffuser filter 3a, a part of the light emitted from the LED 4 enters the gap B ₁ , and uneven brightness is generated on the surface J of the diffuser filter 3a. It is possible to supply a uniform light without any problems.
On the other hand, the partitions 12a ₁ and 12a ₂ have a function of preventing the light emitted from the LED 4 from diffusing in the plane direction of the shaucus tena 1a ₁ , and the lighting part and the non-lighting part of the LED 4 on the upper surface J of the diffuser filter 3a. The boundary can be made clear.
As described above with reference to FIGS. 1 and _2, by providing the reflector 9 a ₁ and the partitions 12 a ₁ and 12 a ₂ , uniform light with high illuminance and no luminance unevenness can be brought into a specific range. Only irradiation is possible.

In the present embodiment, an LED that emits white light is used. However, since the technical content of causing the LED to emit white light is known, detailed description of the technology is omitted.
Moreover, it is preferable to use LED with high brightness and high color rendering property as the LED 4 used in the present invention. The color rendering property is an effect of how a color of an object is viewed by a certain light source or an attribute of the light source, which is indicated by a numerical value from 1 to 100 as compared with a reference light source made of artificial light. It can be said that it is a light source with high color rendering properties.
In addition, for the LED 4 according to the present embodiment, for example, an ultraviolet ray that contains a substance that absorbs ultraviolet light having a wavelength of 390 nm or less in a resin material that encapsulates the light emitting chip or cuts light having a wavelength of 390 nm or less. By configuring the removal filter on the surface of the LED 4 so as not to generate ultraviolet light having a wavelength of 390 nm or less from the LED 4, ultraviolet light having a wavelength of 390 nm or less is emitted from the light emitting chip of the LED 4. Even if there is, there is no worry that the reader will be exposed.
In addition, the same effect can be expected even if an ultraviolet ray removing filter is provided on at least one of the filters 3 including the diffuser filters 3a and 3b.
Note that a method of including a substance that absorbs ultraviolet light in a resin material encapsulating the light emitting chip and a method of providing an ultraviolet removing filter may be used in combination. Thus, by using two types of methods together, it becomes possible to remove a plurality of types of ultraviolet rays having different wavelengths, and the safety of the shaucusten according to the present invention can be further enhanced.

On the other hand, when the emission wavelength of the LED 4 disposed on the substrate 5 of the shaucusten 1a _{1 according} to the present embodiment is larger than 390 nm, there is no concern that harmful ultraviolet rays are emitted from the planar light source 10a. The structure for removing ultraviolet rays like is not required. For this reason, it becomes a particularly safe shaukasten 1a ₁ .

With reference to FIGS. 3 to 5, a description will be given of a mechanism in which light is applied only to the mounting range of the object to be read 8 in the shaw casten 1a _{1 according} to the present embodiment.
First, a mechanism for specifying the position of the object to be read 8 by the optical sensor will be described.
FIG. 3 is a conceptual diagram of the Caucusten optical sensor according to the first embodiment of the present invention. FIG. 4A is a conceptual diagram showing the arrangement of the optical sensor and the pressing member of the Saucusten according to the first embodiment of the present invention, and FIG. 4B is a conceptual diagram showing a state where an object to be read is mounted. It is. In addition, the same code | symbol is attached | subjected about the same part as what was described in FIG. 1 or FIG. 2, and the description about the structure is abbreviate | omitted.
The optical sensor 13 attached to the shaw sten 1a _{1 according} to the present embodiment is composed of a substantially C-shaped or substantially U-shaped sensor body 13d and a conducting wire 13c, and a light emitting section 13a is provided at the upper end of the sensor body 13d. However, a light receiving portion 13b is provided at the lower end, and the light receiving portion 13b senses the light 14 emitted from the light emitting portion 13a.
The optical sensor 13 detects that there is an object between the light emitting unit 13a and the light receiving unit 13b when the light 14 is blocked for some reason and the light receiving unit 13b cannot receive the light 14. At this time, a signal for detecting the object “present” is emitted from the sensor main body 13d and transmitted to a control unit (not shown) through the lead wire 13c.
For example, a photocoupler is used as the optical sensor 13 used in the present embodiment.
As shown in FIG. 4 (a), in the light box 1a ₁ of the present embodiment includes an optical sensor 13 and the pressing member 6 as described above on the upper surface outer edge of the diffuser filter 3a alternately. Then, as shown in FIG. 4B, when the object to be read 8 is inserted between the pressing member 6 and the diffuser filter 3a, the light emitted from the light emitting portion 13a in the optical sensor 13 disposed in that portion is covered. By being blocked by the image interpretation object 8, the attachment of the object to be interpreted 8 is detected, and at the same time, the attachment position and the width L of the object to be interpreted 8 are identified and structured.

Next, a mechanism for irradiating light only to the mounting range of the object to be read 8 based on the detected mounting position and width data of the object to be read 8 will be described with reference to FIG.
FIG. 5A is a conceptual diagram showing a planar light source divided by a partitioning body in the shaw casten according to the first embodiment of the present invention, and FIG. 5B shows a state in which a part of the LED is lit. It is a conceptual diagram. The same parts as those described in FIGS. 1 to 4 are denoted by the same reference numerals, and description of the configuration is omitted. For easy understanding of the description, the length in the left-right direction of the object to be read 8 shown in FIG. 4 is referred to as the width, and the length in the vertical direction is simply referred to as the length.
As shown in FIG. 5 (a), the surface light source 10a is divided into a plurality of compartments by a partition member 12a _1. If the section partitioned by the partition 12a ₁ is called a cell, the planar light source 10a according to the present embodiment includes a cell 15a that houses a plurality of LEDs 4 and a 15b that houses only one LED 4. It is configured. Further, these cells 15a and 15b constitute a minimum unit for controlling turning on / off of the LED 4.
That is, in the present embodiment, an area for simultaneously controlling a plurality of LEDs 4 and an area for individually controlling the LEDs 4 are arranged side by side.
Usually, the read object 8 is an X-ray film or other film on which an image is captured, and these have a predetermined standard. Therefore, for example, by setting the length M in the longitudinal direction of the cell 15a in FIG. 5A to be the minimum value of the width or length of the object to be read 8 to be used, the planar light source 10a Wiring for controlling can be simplified.

Further, in the shaucus tena 1a _{1 according} to the present embodiment, in order to irradiate the light of the LED 4 only to the attachment range of the object to be read 8, the prescribed dimension of the object to be read 8 attached to the shaucus tena 1a ₁ is set to the width. The size and length are stored in advance in the control unit, and first, the length U of the object to be read 8 is specified based on the width L detected by the optical sensor 13 as shown in FIGS. To do. Next, a difference obtained by subtracting the length M of the cell 15a from the length dimension U is obtained, the difference is divided by the length dimension N of the cell 15b, and an integer part of the obtained quotient is extracted. The number of lighting rows may be used. At this time, the cells 15b are set to light up sequentially from the upper row toward the lower side.
Further, when calculating the number of rows of cells 15b that need to be lit in the order as described above based on the width dimension L of the object to be read 8, the obtained quotient, that is, (UM) / X = N / When the calculated value of X includes fractions after the decimal point, an area where the light of the LED 4 is not irradiated is generated at the lower edge of the object to be read 8. Although the image is reflected on the film, a jig for holding the film during shooting is provided on the upper and lower edges of the film, so images are not reflected on the upper and lower edges of the film, and light is reflected on the lower edge of the film. Even if it is not irradiated, there is no inconvenience in the interpretation work.
As described above, in the shaucus ten 1a ₁ according to the present embodiment, even when the object to be read 8 is attached at an arbitrary position, the light of the LED 4 can be irradiated only to the attachment range of the object to be read 8. it can.

In the shaukasten 1a _{1 according} to the present embodiment, two types of cells 15a and 15b having different sizes are provided and set as the minimum unit for controlling the turning-off / lighting of the LED 4, but it is not necessarily so large. There is no need to provide two different types of cells 15a and 15b. For example, the cell 15b alone may be configured to control the turn-off / lighting of the LED 4 individually. In this case, the length dimension U specified based on the width dimension L of the object to be read 8 detected by the optical sensor 13 is divided by the length dimension X of the cell 15b, and only the integer value of the quotient is extracted. The number of rows of cells 15b that need to be lit may be set.
Further, in the present embodiment, the optical sensor 13 is used as the sensor for detecting the mounting position and the width dimension L of the object to be read 8, but the light sensor 13 is not necessarily used, and the object to be read 8 is mounted. As long as the position and the width dimension L can be detected, the type of sensor does not matter. In addition, when a sensor other than the optical sensor 13 is used as a sensor for detecting the attachment of the object to be read 8, the sensor mounting method and arrangement may be changed as appropriate.
In addition, in the object to be read 8, for example, when there is an object to be read 8 having a plurality of different length dimensions with respect to the same width dimension, a changeover switch is provided in the frame 2 of the shaw kasten 1 a _1. You may comprise so that a length dimension can be selected with a switch. For example, the half-cut (14 × 17 inch) and large four-cut (11 × 14 inch) used as X-ray films both include a size of 14 inches. When the four cuts are mounted on the shaukasten, the length in the vertical direction is different. Therefore, by providing a switch that indicates whether it is to be mounted vertically or horizontally, the length detected by the photosensor provided at the top of the shaukasten is the long side dimension or the short side dimension. This makes it possible to determine in advance.

Modifications 1 to 6 of the shaw casten 1a _{1 according} to the present embodiment will be described with reference to FIGS.

(1) First, Modification 1 and Modification 2 will be described with reference to FIG.
6 (a) and 6 (b) are partial cross-sectional views showing modified examples 1 and 2 of the shaukasten according to the first embodiment of the present invention. The same parts as those described in FIGS. 1 to 5 are denoted by the same reference numerals, and description of the configuration is omitted.
As shown in FIG. 6A, a shaucus tena 1a ₂ which is a modified example 1 of the shaucus tena 1a _{1 according to} the _first embodiment includes a reflector 9a ₁ and a partition in the shaucus tena 1a ₁ shown in FIG. Instead of 12a ₁ , a reflector 9a ₂ that integrates these functions is provided on the substrate 5.
Reflector 9a ₂ of light box 1a ₂ according to Modification 1 is configured as a thin metal film 9b ₁ for reflecting the light by the support member 9c ₁ which supports this, again diffuser filter light reflected at the bottom surface of the diffuser filter 3b 3b is provided across the diffuser filter 3b so as to form a pair centering on the LED 4 on the substrate 5 so that the end of the reflector 9a _{2 on} the diffuser filter 3b side extends from the leg part of the LED 4 toward the light emitting part. It is configured to spread. Further, the partition 12a ₂ suspended from the diffuser filter 3b is provided so as to coincide with a position where the adjacent reflectors 9a ₂ come into contact with the lower surface of the diffuser filter 3b while being in contact with each other.
By disposing the reflector 9a ₂ and the partition 12a ₂ in this way, light can be diffused only within the range partitioned by the reflector 9a ₂ and the partition 12a ₂ , that is, the reflector 9a ₂ and the partition It is possible to prevent the light from diffusing out of the range partitioned by the body 12a ₂ and to clarify the boundary between the lighting part and the extinguishing part of the LED 4 on the upper surface of the diffuser filter 3a.
The reflector 9a ₂ is not necessarily constituted by the metal thin film 9b ₁ support material 9c _1. For example, a metal plate whose surface is polished into a mirror surface, or a glass or resin material whose refractive index is totally reflected may be used. Good. That is, the material is not particularly problematic as long as it reflects light on the surface and does not substantially transmit light to the reflector 9a ₂ itself. The same applies to the metal thin films related to other partitions and reflectors described in the present specification.
Further, the reflector 9a ₂ may be provided so as to individually cover the side surfaces of the LEDs 4 one by one, or a metal plate bent so as to have a substantially V-shaped cross section is provided between the columns / rows of the LEDs 4. It may be provided. At this time, it is preferable that the top of the bent metal plate is in contact with the lower surface of the diffuser filter 3b.

Further, the reflector 9a ₃ of light box 1a ₃ according to the second modification, similarly to the case of the reflector 9a ₂ of light box 1a ₂ according to Modification 1, reflector 9a in light box 1a ₁ shown in FIG. 2 (b) Instead of ₁ and the partition 12a ₁ , the LED 4 is provided with a reflector 9a ₃ that integrates these functions.
The reflector 9a ₃ is configured with a metal thin film 9b ₂ which reflects light by the supporting member 9c ₂ supporting it, that it is mounted separately LED4 the reflector 9a ₂ according to Modification 1 is different.
That is, the reflector 9a _{3 according} to the modified example 2 has a socket shape, covers the side surface of the resin in which the light-emitting chip of the LED 4 is encapsulated, and expands toward the diffuser filter 3b. Further, the reflector 9a ₃ contacts the reflector 9a ₃ adjacent to each other, further, it is preferable that its upper end is in contact with the lower surface of the diffuser filter 3b.
The partition 12a ₂ is provided so as to coincide with the upper end of the reflector 9a ₃ that contacts the lower surface of the diffuser filter 3b. By disposing the reflector 9a ₃ and the partition 12a ₂ in this way, the same effect as that of the above-described modification 1 can be obtained.
It should be noted that a metal plate whose surface is mirror-polished can also be used for the reflector 9a ₃ .

(2) Next, Modification 3 and Modification 4 will be described with reference to FIG.
7 (a) and 7 (b) are partial cross-sectional views showing modified examples 3 and 4 of the shaucus ten according to the first embodiment of the present invention. The same parts as those described in FIGS. 1 to 6 are denoted by the same reference numerals, and description of the configuration is omitted.
As shown in FIG. 7A, the shaucus tena 1a _{4 according to the} third modification of the shaucus tena 1a ₁ according to the present embodiment includes a partition 12a ₂ and a reflector 9a _{2 of the} shaucus tena 1a _{2 according to} the first modification described above. Is provided with a reflector 9a ₄ that is integrally formed through the diffuser filter 3b.
Such a reflector 9a ₄ has an effect of preventing the light from diffusing in the horizontal direction in the medium of the diffuser filter 3b. As a result, the light emitted from the LED _{4 is} divided into the compartments partitioned by the reflector 9a ₄ . Since the light is scattered only at, the boundary between the lit portion and the unlit portion of the LED 4 on the upper surface of the scatter filter 3a can be further clarified.
Further, as shown in FIG. 7B, the shaucus tena 1a _{5 according to the} fourth modification of the shaucus tena 1a ₁ according to the present embodiment is similar to the third modification in the partition 12a according to the second modification described above. ₂ and the reflector 9a ₃ are integrally formed through the diffuser filter 3b, and the reflector 9a _{4 according} to the modification 3 is different in that the reflector 9a ₅ is attached to the LED 4.
Incidentally, operation and effect of the reflector 9a ₅ is the same as the reflector 9a _4.
Moreover, in the modification 3 and the modification 4, the number of the diffuser filters 3 provided in the reflectors 9a ₄ and 9a ₅ does not need to be one, and a plurality may be provided.

(3) Finally, as an example of the case where two or more diffuser filters 3 are provided, modified examples 5 and 6 when three diffused filters 3 are provided will be described with reference to FIGS.
FIG. 8 is a partial cross-sectional view showing a fifth modification of the shaw casten according to the first embodiment of the present invention. The same parts as those described in FIGS. 1 to 8 are denoted by the same reference numerals, and description of the configuration is omitted.
As shown in FIG. 8, the shaucus tena 1a ₆ according to the modified example 5 is such that another diffuser filter 3c is provided between the diffuser filters 3a and 3b in the shaucus tena 1a ₁ and the upper surfaces of the respective diffuser filters 3b and 3c. The partition 12a ₂ is vertically suspended while being aligned with the partition 12a ₁ .
Further, a gap B ₁ is formed between the upper end of the partition 12a ₂ on the diffuser filter 3c and the lower surface I of the diffuser filter 3a, thereby preventing the partition 12a _{2 from} being projected onto the upper surface of the diffuser filter 3a. ing.
In other words, the first and second filters described in claim 1 are the light-diffusing filters 3b and 3a in the shaukasten 1a _{6 according} to the modified example 5, and the other filters are filters sandwiched between the two filters. That is, the diffuser filter 3c is shown.
As described above, the shaucus ten according to the present invention can have two or more diffused filters 3 interposed between the object to be read 8. In this case, the partition 12a ₂ is vertically suspended on all the diffuser filters other than the diffuser filter 3a on which the object to be read 8 is placed, and between the lower surface of the diffuser filter 3a and the partition 12a ₂ disposed immediately below the diffuser filter 3a. It is only necessary to form a gap.
In other words, the light reaching the object to be read 8 is diffused to such an extent that luminance unevenness does not occur, and the attenuation of light inside the housing formed by the frame 2 and the bottom plate 7 is suppressed to such an extent that the interpretation of the object to be read is not affected. If so, three or more diffuser filters 3 may be covered.
Further, the shaucus tena 1a ₆ having the above-described configuration includes the _third diffuser filter 3 in addition to the operations similar to the operations of the shaukasten 1a _{1 to} 1a ₃ described above, so that the boundary surface on which light is reflected or refracted is provided. Furthermore, the diffusion of light can be further promoted. That is, in the shaukasten 1a _{6 according} to the modified example 5, as shown in FIG. 8, the diffusion of light is further promoted by newly adding the boundary surfaces indicated by the symbols V and W. Of course, three or more diffuser filters 3 may be provided.

FIG. 9 is a partial cross-sectional view showing a modified example 6 of the shaw casten according to the first embodiment of the present invention. The same parts as those described in FIGS. 1 to 8 are denoted by the same reference numerals, and description of the configuration is omitted.
The shaucus tena 1a _{7 according} to the modified example 6 shown in FIG. 9 includes a partition 12a _{3 in} which the shrouds 12a ₁ and 12a _{2 of the} shaucus tena 1a ₆ shown in FIG. 8 are integrally formed through the diffuser filters 3b and 3c. are those, its operation and effect are the same as light box 1a _5, 1a ₆ according modification 3, to the fourth modification, addition, by providing the diffuser filter 3c, light box 1a ₅ according to the modified example 4, 5, it can be further promoted the diffusion of light compared to the 1a _6.

Thus, in a light box 1a ₁ to 1A ₇ according to the present embodiment, the illuminance of light reaching the upper surface of the diffuser filter 3a by providing a reflector 9a ₁ and the metal film 9b _1, 9b _2, 12b, This can be improved by about 10% compared to the case without these.
In general, the LED 4 increases in brightness when the amount of current flowing through the light emitting chip is large. On the other hand, the temperature of the light emitting chip itself rises, the deterioration of the encapsulating resin is accelerated, and the life of the LED itself is shortened.
Therefore, the shaukasten 1a _{1 to} 1a _{7 according} to the present invention can secure desired illuminance with less power by providing the reflector 9a ₁ and the metal thin films 9b ₁ , 9b ₂ , 12b. The lifetime can be extended. In addition, power consumption can be reduced.
Further, as the amount of power consumed by the planar light sources 10a to 10e is reduced, the amount of heat generated from the light source during light emission is also reduced. For this reason, it is possible to further prevent the temperature rise on the surface of the diffuser filter 3a and the alteration of the object to be read 8 accompanying this temperature rise.

A method of using the shaucus ten 1a _{1 according} to the first embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 1, in order to observe the content projected on the object 8 to be read by the shaucus ten 1a _{1 according} to the present embodiment, the outer edge of the object 8 to be read is placed in the gap formed by the frame 2 and the diffuser filter 3a. Just plug it in. By mounting the object to be read 8 in this way, the mounting position and the width dimension L of the object to be read 8 are specified by the optical sensor 13 (not shown) installed in the gap formed by the frame 2 and the diffuse filter 3a. Based on the data, a mounting range of the object to be read 8 is specified by a control unit (not shown), and the LED 4 arranged in the mounting range of the object to be read 8 is turned on.

[2] A shaw casten according to the second embodiment of the present invention will be described below with reference to FIGS. (Mainly corresponding to claims 5 to 8)
FIG. 10A is a partial cross-sectional view of the shaucus ten according to the second embodiment of the present invention, and FIG. 10B is a conceptual diagram showing the arrangement of the light shields of the shaucus ten according to the second embodiment of the present invention. It is. The same parts as those described in FIGS. 1 to 9 are denoted by the same reference numerals, and description of the configuration is omitted. FIG. 10A shows the AA line when the shaucus ten 1b according to the second embodiment of the present invention is arranged in the same manner as the shaucus ten 1a _{1 according} to the _first embodiment of the present invention. The cross section in the orthogonal line is shown.
Moreover, the 1st, 2nd filter described in Claim 4 respond | corresponds to the diffused filter 3a, 3b of the shaukasten 1b which concerns on this Embodiment, respectively.
The shaucus tens 1a _{1 to} 1a _{7 according} to the first embodiment of the present invention are configured to irradiate light only to the attachment range of the object to be read 8 by controlling the turning on / off of the LED 4. On the other hand, the shaucusten 1b according to the second embodiment of the present invention irradiates light only on the mounting range of the object to be read 8 by covering the range where the object to be read 8 is not mounted with the light shielding bodies 16a to 16c. It is comprised as follows.
Accordingly, light box 1b according to this embodiment includes a light shield 16a~16c instead the partition member 12a _1, 12a ₂ of the light box 1a _1, in place of the control unit for controlling the on / off of the LED 4, light shielding A drive mechanism and a control mechanism for changing the arrangement of the bodies 16a to 16c are provided.

As shown in FIG. 10 (a), the shaucus ten 1b according to the present embodiment does not show the light shielding bodies 16a to 16c (the light shielding body 16 is not shown) just below the diffuser filter 3a on which the object to be read 8 is placed. ). Further, the end portions of the light shielding bodies 16a and 16b arranged on the center side of the light diffusion filter 3a are pivotally supported by the fixing members 22a and 22b, and the other end portions are temporarily wound around the winding shafts 18a and 21b via the pulleys 21a and 21b. It is wound around 18b. The details of the drive mechanism for the light shields 16a and 16b will be described later.
Moreover, as shown in FIG.10 (b), the light-shielding bodies 16a-16c which concern on the shaukasten 1b which concerns on this Embodiment are arrange | positioned as follows. That is, the light shields 16a and 16b are arranged so as to cover the diffuser filter 3a from the left and right ends of the diffuser filter 3a toward the center, and the light shield 16c is diffused from the lower end to the upper end of the diffuser filter 3a. It is arranged to cover.
That is, the light shield 16a is configured to be movable in the direction indicated by the symbol P in the figure, the light shield 16b is movable in the direction indicated by the symbol Q in the figure, and the light shield 16c is configured to be movable in the direction indicated by the symbol R in the figure. .

A mechanism in which light is applied only to the mounting range of the object to be read 8 in the shaucus ten 1b according to the second embodiment of the present invention will be described.
In the case of the shaucus ten 1b according to the second embodiment of the present invention, as in the case of the shaucus ten 1a _{1 according to} the _first embodiment, the prescribed dimension of the object 8 to be read, i.e. The width dimension and the length dimension of the image interpretation object 8 may be stored in advance.
When the object to be read 8 is inserted into a gap formed by the frame 2 and the diffuser filter 3a (not shown), the optical sensor 13 detects the attachment of the object to be read 8 and simultaneously the width dimension L of the object to be read 8 is shown. Not specified in the control unit. Subsequently, the length dimension U is specified based on the width dimension L of the read object 8, and the mounting range of the read object 8 is specified. Finally, the driving mechanism is operated based on the position data of the object to be read 8, and the light shielding bodies 16 a to 16 c are arranged in portions other than the mounting range of the object to be read 8.
When the movement of the light shielding bodies 16a to 16c is completed in the order as described above, light is irradiated to the area Y indicated by the oblique lines in FIG.
Note that in the shaw casten 1b according to the present embodiment, it is desirable that the light shielding members 16a to 16c are arranged in parallel to the light scattering filter 3a, and that the light scattering filter 3a and the light shielding members 16a to 16c are close to each other. That is, it is preferable that the distance between the diffuser filter 3a and the light shields 16a to 16c is as narrow as possible because the entire thickness of the apparatus is reduced.
For this reason, all of the light shielding bodies 16a to 16c are once wound around the winding shafts 18a to 18c via pulleys 21a to 21c (not shown).
This is because if the distance between the diffuser filter 3a and the light shields 16a to 16c is large, the boundary between the light irradiation part and the light shield part on the surface of the diffuser filter 3a becomes unclear, and light leaks from the outer edge of the object 8 to be read. It is because it ends up.

An example of a drive mechanism for the light shield 16a in the shaw casten 1b according to the present embodiment will be described with reference to FIG.
FIG. 11 is a conceptual diagram showing an example of a drive mechanism for a shaw casten light-shielding body according to the second embodiment of the present invention. The same parts as those described in FIGS. 1 to 10 are denoted by the same reference numerals, and description of the configuration is omitted. Further, since the light shielding bodies 16b and 16c in the shaw casten 1b according to the present embodiment also have the same driving mechanism as the light shielding body 16a, only the driving mechanism of the light shielding body 16a will be described here.
As shown in FIG. 11, the right end portion of the light shield 16a is pivotally supported by the fixing member 22a, and the left end portion is wound around the winding shaft 18a via the pulley 21a. Further, both end portions of the fixing member 22a are respectively fixed to timing belts 17a and 17b arranged in parallel, and the timing belts 17a and 17b are respectively held in an annular shape by the support shafts 20a _{1 to} 20c ₁ and the rotating shaft 19a. .
Further, one end portions of the winding shaft 18a and the rotating shaft 19a are provided with step motors 23a and 24a, respectively. These step motors 23a and 24a are connected to a control unit (not shown) and are fixed by operation of the step motors 23a and 24a. The member 22a is moved in the direction indicated by the symbol T or S in the drawing, and the lower surface side of the light diffusion filter 3a (not shown) is covered with the light shielding body 16a.
In addition, although the case where the two step motors 23a and 24a are provided is described as an example in the shaw casten 1b according to the present embodiment, the step motor 23a is not necessarily provided. Instead, an elastic body such as a spiral spring used for the mainspring is connected to the winding shaft 18, and tension is applied so that the light shielding body 16a is always in a wound state, and the fixing member 22a is formed only by the step motor 24a. The movement may be controlled.
Further, the drive mechanism of the light shielding bodies 16a to 16c in the shaw casten 1b according to the present embodiment is not limited to that shown in FIG. 11, and the light shielding body 16a while keeping the diffuser filter 3a and the light shielding bodies 16a to 16c in parallel. The structure is not a problem as long as it can be configured to control the arrangement of ˜16c.
In the present embodiment, the case where two filters are interposed between the object to be read 8 and the light source has been described as an example. However, two or more filters are interposed between the object to be read 8 and the light source. You may set up.

[3] A prototype of the shaukasten according to the first embodiment of the present invention will be described below with reference to FIGS.
FIG. 12 is a photograph showing the usage state of the prototype of the Saucusten according to the first embodiment of the present invention, and FIG. 13 is a photograph showing the case where the partition is removed for comparison. In FIGS. 12 and 13, the portion showing the patient data is deleted.
The prototype of the shaukasten shown in FIG. 12 is a faithful reproduction of the shaukasten 1a _{1 according} to the first embodiment of the present invention. The LED 4 on the side can make the boundary between the lit part and the unlit part clear.
On the other hand, when the partition bodies 12a ₁ and 12a ₂ are removed from the shaw casten which is a prototype of the shaucus ten 1a _{1 according} to the first embodiment of the present invention, as shown in FIG. The boundary between the lit part and the unlit part of the LED 4 is unclear, and the light protrudes from the side edge of the film even though only the LED 4 arranged just below the film as the object to be read 8 is lit. It is in a state. In such a state, the image projected on the side edge portion of the film that is the object to be read 8 appears relatively dark due to the illuminance of the protruding light.
In particular, when a doctor makes a diagnosis while interpreting an X-ray photographic film or the like that is the object to be read 8, even a slight misreading may lead to a misdiagnosis, and in the worst case, it may be fatal. It is.
Therefore, in order to allow the operator to accurately read the content displayed on the object to be read 8, not only the light irradiated to the object to be read 8 has a high illuminance but also the object 8 to be read. It is necessary to configure so that the object to be read 8 does not appear dark due to light that protrudes from the side edge.
Therefore, it is configured such that light is applied only to the mounting range of the object to be read 8 and the boundary thereof becomes clear, as in the case of the shaukasten 1a _{1 to} 1b according to the _first and second embodiments of the present invention. Thus, the image interpreter can accurately read the content displayed on the object to be interpreted 8.
That is, the shaukasten 1a _{1 to} 1b according to the _first and second embodiments of the present invention provides an optimum environment for interpretation when a doctor makes a diagnosis while interpreting an object to be interpreted 8 such as an X-ray photographic film. It is provided and is particularly useful.

  As described above, according to the first to seventh aspects of the present invention, the light emitted from the LED is diffused while maintaining the illuminance, and the light is irradiated only to the mounting range of the object to be read. Therefore, it is highly likely to be used in the field related to medical Saucusten using LEDs and widely used lighting devices.

It is a perspective view which lacks and shows a part of shaw casten which concerns on the 1st Embodiment of this invention. (A) is the conceptual diagram which showed a mode that the light of adjacent LED interfered, (b) is a fragmentary sectional view of the code | symbol AA in FIG. 1 (a). BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual diagram of a photo sensor for Saucusten according to a first embodiment of the present invention. (A) is a conceptual diagram which shows arrangement | positioning of the optical sensor and press member of the Sau-Kasten which concern on the 1st Embodiment of this invention, (b) is a conceptual diagram which shows a mode that the to-be-read object was mounted | worn. (A) is a conceptual diagram which shows the planar light source divided | segmented by the partition in the shaw casten which concerns on the 1st Embodiment of this invention, (b) is the conceptual diagram which showed a mode that some LED lighted up It is. (A), (b) is a fragmentary sectional view which shows the modification 1 and the modification 2, respectively of the shaw casten which concerns on the 1st Embodiment of this invention. (A), (b) is a fragmentary sectional view which shows the modification 3 and the modification 4 of the shaw casten which respectively concern on the 1st Embodiment of this invention. It is a fragmentary sectional view which shows the modification 5 of the shaw casten which concerns on the 1st Embodiment of this invention. It is a fragmentary sectional view which shows the modification 6 of the shaw casten which concerns on the 1st Embodiment of this invention. (A) is a fragmentary sectional view of the shaukasten which concerns on the 2nd Embodiment of this invention, (b) is a conceptual diagram which shows arrangement | positioning of the light shielding body of the shaukasten concerning the 2nd Embodiment of this invention. . It is a conceptual diagram which shows an example of the drive mechanism of the shaukasten light-shielding body based on the 2nd Embodiment of this invention. It is a photograph which shows the use condition of the prototype of the shaw casten which concerns on the 1st Embodiment of this invention. It is a photograph which shows the case where a partition is removed for comparison.

Explanation of symbols

1a ₁ ~1a _7, 1b ... light box 2 ... frame 3,3A～3c ... diffuser filter 4 ... LED 5 ... substrate 6 ... pressing member 7 ... bottom plate 8 ... the interpretation thereof 9a ₁ ~9a ₅ ... reflector 9b _1, 9b ₂ ... Metal thin film 9c ₁ , 9c ₂ ... Support material 10a to 10e ... Planar light source 11 ... Space 12a _{1 to} 12a ₃ ... Partition 12b ... Metal thin film 12c ... Support material 13 ... Optical sensor 13a ... Light emitting part 13b ... Light receiving part 13c ... lead 13d ... sensor body 14 ... light 15a, 15b ... cell 16 a to 16 c ... light shield 17a, 17b ... timing belt 18a, 18b ... winding axis 19a, 19b ... rotating shaft 20a ₁ ~20c ₁ ... support shaft 21a, 21b ... Pulley 22a, 22b ... Fixing member 23a, 24a ... Step motor

Claims (8)

A light source is arranged inside a box-shaped housing, and a filter arranged close to the light source is a first filter, and a filter that contacts the object to be read is a second filter. A shausten for medical use in which the object to be read is irradiated with light and viewed through the object to be read,
The light source is a planar light source in which white light emitting diodes (hereinafter referred to as LEDs) are arranged on a plurality of substrates.
In the planar light source, a first partition is suspended in a gap with the first filter so as to partition the planar light source,
In the filter including the first filter, a second partition body is suspended while being aligned with the first partition body,
The shaucus ten is characterized in that the second partition member is suspended so as not to contact the second filter.   2. The shaw casten according to claim 1, wherein the first partition and the second partition are integrally formed through the filter including the first filter.   A sensor for detecting the position of the object to be read provided in a gap between the frame of the casing and the second filter on which the object to be read is placed and capable of specifying a mounting range of the object to be read, and the position of the object to be read 3. The shaw casten according to claim 1, further comprising a control unit that turns on the planar light source in a section that coincides with a mounting range of the object to be read detected by the detection sensor. The planar light source includes a first control section that is partitioned by the first partition and receives a single LED, and a second control section that is partitioned by the first partition and stores a plurality of LEDs. And
The length of the long side in the second control section is substantially the same as the minimum value of the width or length of the object to be read. A medical device in which a light source is arranged inside a box-shaped casing, and the object to be read is irradiated with light from the outside of the casing through at least the first filter and the second filter to see through the object to be read Schaukasten
The light source is a planar light source in which LEDs are arranged on a plurality of substrates,
A light shield that covers the first filter in a gap between the first filter and the second filter, and a drive mechanism that drives the light shield;
A reading object position detection sensor provided in a gap between the frame portion of the housing and the first filter on which the reading object is placed and capable of specifying a mounting range of the reading object, and the position detection of the reading object And a control unit for operating the drive mechanism so as to cover the first filter outside the mounting range of the object to be read detected by the sensor with the light shield.   The said board | substrate or LED is provided with a reflector, The shaukasten of any one of Claim 1 thru | or 5 characterized by the above-mentioned.   The said LED has a light emission wavelength of this LED larger than 390 nm, The shaukasten of any one of Claim 1 thru | or 6 characterized by the above-mentioned. The at least one filter among the filters including the LED or the first and second filters includes an ultraviolet removal filter that cuts ultraviolet rays having a wavelength of 390 nm or less. The shaukasten of any one of claim | item 6.