JP4455746B2 - Lamp house and light emitting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp house for detecting fluorescence characteristics of a measurement sample by irradiating the measurement sample with ultraviolet light or infrared light emitted from a xenon lamp or mercury xenon lamp set therein, and a xenon lamp. And so on.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a light emitting device that detects a fluorescence characteristic of a measurement sample by irradiating the measurement sample with ultraviolet light or infrared light emitted from a xenon lamp or a mercury xenon lamp. As an example of such a light emitting device, there is a device described in Japanese Patent Application Laid-Open No. 11-329046. In this device, a part of light emitted from the lamp is reflected in the lamp house accommodating the lamp. A reflection mirror is provided.
[0003]
[Problems to be solved by the invention]
However, the conventional light emitting device has the following problems. That is, in the light emitting device, it is necessary to adjust the optical axis of the replacement lamp when the lamp has reached the end of its life and is replaced with a new lamp. Here, in the light emitting device having the reflection mirror as described above, the direct light from the lamp and the reflected light reflected by the reflection mirror are emitted. That is, there are two bright spots from the lamp. When adjusting the replacement lamp, if the bright spot of the reflecting mirror overlaps the tip of the cathode electrode, the temperature of the cathode electrode rises and the electron emitting material impregnated inside may evaporate. . When such a situation occurs, the life of the lamp is extremely shortened. On the other hand, if the two bright spots are significantly shifted, the output distribution of the emitted light will not be uniform.
[0004]
As described above, the adjustment of the optical axis of the lamp is particularly important in a light emitting device of the type having a reflecting mirror, and the present inventors have been required to develop a device capable of accurately adjusting the optical axis.
[0005]
Further, as one application of the light emitting device as described above, there is an inspection device that irradiates light on a transparent plate and projects the irradiation light on a screen to inspect the transparent plate for scratches or dust. In such a case, it is not the computer but the inspector who sees the projected image on the screen, and it has been desired that the inspector can use the light emitting device more safely.
[0006]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lamp house and a light emitting device that are easy to adjust the optical axis and can be used more safely than in the past.
[0007]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, in a lamp house in which a lamp is housed, a reflecting mirror that reflects a part of light emitted from the lamp, and a position facing the reflecting mirror via the lamp are provided. An outer case having an exit window from which light emitted from the lamp and reflected light reflected by the reflecting mirror are emitted; an ultraviolet cut filter that cuts ultraviolet rays contained in the light emitted from the lamp and the reflected light reflected by the reflecting mirror ; and An aperture member having an aperture area smaller than the exit window and having an aperture through which light emitted from the lamp and reflected light pass, and an inner case that is provided in the outer case and accommodates the lamp, and between the inner case and the outer case An air circulation space that is formed and circulates air flowing in from the outside, and a flange that is screwed to the outer surface on which the exit window of the outer case is formed. , The flange is attached a filter unit which ultraviolet cut filter is fitted, the aperture member, the threaded portion formed in the aperture member and the filter unit, that is removably attached to the filter portion Features.
[0008]
The light emitting device of the present invention is characterized in that a lamp is installed in the lamp house.
[0009]
According to the lamp house and the light emitting device according to the present invention, the ultraviolet rays contained in the light emitted from the lamp and the reflected light reflected by the reflecting mirror are cut by the ultraviolet cut filter, so that it is safe for those who have seen the emitted light. It has become. Further, by attaching an aperture member having an aperture whose opening area is smaller than that of the exit window to the lamp house, direct light from the lamp and reflected light from the reflection mirror are narrowed by the aperture, and directivity is increased. Thus, when the direct light from the lamp that has passed through the aperture and the reflected light from the reflecting mirror are projected onto, for example, a screen or the like, the outline of each projected image becomes relatively clear and the optical axis can be easily adjusted.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a lamp house and a light emitting device according to the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol shall be used for the same element and the overlapping description is abbreviate | omitted.
[0011]
First, the configuration of the lamp house and the light emitting device according to the present embodiment will be described. FIG. 1 is an overall perspective view showing a light emitting device 6 in which a xenon lamp 4 is accommodated in a lamp house 2 according to the present embodiment. FIG. 2 is a II-II cross-sectional view of the light emitting device 6 shown in FIG.
[0012]
The lamp house 2 includes a rectangular parallelepiped outer case 8 and a side cover 10 that can be attached to and detached from a side portion of the outer case 8, and FIG. 1 shows a state in which the side cover 10 is removed. In addition, the side surface of the outer case 8 is formed with an emission window 12 through which light emitted from the lamp 4 is emitted and an air inlet 14 through which external air flows. The air inlet 14 is an elongated hole formed so that the longitudinal direction thereof faces the lateral direction of the side surface of the lamp house 2, and is provided on the three side surfaces of the outer case 8 and the side cover 10. . On the other hand, an air outlet 16 through which the air in the lamp house 2 flows out is formed on the upper surface of the outer case 8, and further, the air in the lamp house 2 is rotated below the air outlet 16 by rotating. A cooling fan 18 is disposed to flow out to the outside, and a safety cover 19 is attached above the air outlet 16.
[0013]
In the lamp house 2, an iron inner case 20 that houses the lamp 4 is provided. In addition, two rails 22 are juxtaposed at the lower portion of the inner case 20 with the longitudinal direction directed toward the mounting position of the side cover 10, and the lamp 4 is supported on the two rails 22. A base 24 is slidably disposed. In the present embodiment, the lamp 4 is surrounded by the inner case 20, the base 24, and the inner case cover 26 connected to the side cover 10 via four support columns 25. Of the three side surfaces of the inner case 20, stoppers 28 that prevent the base 24 from sliding are hung on two surfaces that contact the inner case cover 26. The stopper 28 is rotatably provided about the pin 27 as an axis, and is configured to prevent the base 24 from sliding unexpectedly by two base fixing portions 29 protruding downward.
[0014]
A cathode fixing plate 30 that is a lamp fixing portion for fixing the lamp 4 is provided at substantially the center of the upper surface of the base 24, and the cathode side of the lamp 4 is attached to the cathode fixing plate 30. The side is attached to a disc-shaped and conductive anode heat radiating plate 32. Furthermore, a lead wire 34 is connected to the anode heat dissipating plate 32, and the lead wire is led out of the inner case 20 from a lead wire outlet 35 opened on the side surface of the inner case 20.
[0015]
Further, a circular light passage port 36 is formed on the side surface of the inner case 20 closest to the emission window 12 (see FIG. 2). On the other hand, a circular mirror accommodation hole 42 is formed at a position facing the light passage port 36 of the inner case 20 with the lamp 4 interposed therebetween. A mirror that accommodates the reflection mirror 44 is formed in the mirror accommodation hole 42. The accommodating part 46 is inserted. Further, a disc-shaped diaphragm plate 54 having an opening is disposed between the exit window 12 and the lamp 4.
[0016]
A ring-shaped flange 82 is screwed to the surface of the outer case 8 where the exit window 12 is formed. The holes of the flange 82 and the exit window 12 have the same diameter. In addition, a filter portion 85 in which an ultraviolet cut filter 84 is fitted is attached to the flange 82. Specifically, the filter portion 85 is fixed to the flange 82 by screwing the female screw portion 82 i formed on the inner peripheral surface of the flange 82 and the male screw portion 85 o formed on the outer peripheral surface of the filter portion 85. . The ultraviolet cut filter 84 of the filter unit 85 cuts an ultraviolet component contained in the light emitted from the lamp 4.
[0017]
In addition, the aperture member 90 is detachable from the filter unit 85. FIG. 1 shows a state in which the aperture member 90 is removed, and FIG. 2 shows a state in which the aperture member 90 is attached to the lamp house 2. An aperture 92 having an opening area smaller than that of the exit window 12 is formed at the center of the aperture member 90. In order to attach the aperture member 90 to the filter portion 85, the male screw portion 90 o formed on the outer peripheral surface of the aperture member 90 may be screwed into the female screw portion 85 i formed on the inner peripheral surface of the filter portion 85. Further, when removing the aperture member 90 from the lamp house 2, the aperture member 90 may be rotated in the direction opposite to that at the time of attachment. When the aperture member 90 is mounted, the center of the aperture 92 is positioned on a straight line passing through the exit window 12 and the reflection mirror 44, and the light emitted from the lamp 4 and the reflected light from the reflection mirror 44 pass through the aperture 92. become.
[0018]
As shown in FIG. 2, the inner case 20 and the outer case 8 are separated from each other, and an air circulation space 48 through which air flowing in from the air inlet 14 circulates between the inner case 20 and the outer case 8. Is formed. In other words, in the present embodiment, the air that flows in from the air inlet 14 hardly flows into the inner case 20 and follows the path indicated by the arrow in the drawing. Then, the inner case 20 is cooled by the inflowing air, thereby indirectly cooling the lamp 4, and an excessive temperature rise of the lamp 4 can be prevented. In the present embodiment, since the air circulation space 48 is formed, the inflowing air flows in the vicinity of the inner side of the outer case 8, and the temperature of the outer case 8 increases as well as the inner case 20 and the lamp 4. Can also be prevented.
[0019]
When the surface temperature of the outer case at the time of light emission was measured, it was 40 degrees or more in the lamp house that did not surround the lamp, whereas the air circulation space 48 was formed by surrounding the lamp 4 with the inner case 20 or the like. In the lamp house 2 of this embodiment, it is about 35 degrees, and it was found that the temperature of the outer case was reduced. Further, since the lamp 4 is surrounded by the inner case 20, dust and dust that flow in along with the air from the air inlet 14 do not dance in the vicinity of the lamp 4. Therefore, the progress of the light emitted from the lamp 4 is not hindered by dust or dirt, and the output of the emitted light can be improved.
[0020]
The cooling fan 18 operates in response to a signal from a temperature sensor (not shown) when the temperature in the lamp house 2 reaches a predetermined temperature, and generates a forced flow of air. By rotating the cooling fan 18, external air can be smoothly flowed from the air inlet 14 of the outer case 8 to the air circulation space 48, or the air of the air circulation space 48 can be smoothly discharged from the air outlet 16. Thus, the temperature rise of the lamp 4 and the outer case 8 can be effectively prevented. The cooling fan 18 may be configured to operate by providing a switch instead of the temperature sensor and turning on the switch.
[0021]
The mirror housing portion 46 is supported at a predetermined interval from the outer case 8 by a reflection mirror adjusting screw 56 screwed into the outer case 8 and a pin 58 fitted into the outer case 8. Further, the mirror accommodating portion 46 is arranged so as not to contact the edge of the mirror accommodating hole 42 and to be separated. For this reason, when the light is reflected, the heat accumulated in the reflection mirror 44 is difficult to be transmitted to the outer case 8, and the reflection mirror 44 is cooled by the air flowing through the air circulation space 48. The rise can be effectively prevented. The mirror housing portion 46 moves in the left-right direction in the drawing by turning the reflection mirror adjustment screw 56, and the output light is adjusted.
[0022]
A starter 62 to which a lead wire 34 electrically connected to the anode side of the lamp 4 and a lead wire 60 electrically connected to the cathode side of the lamp 4 is connected is disposed at the bottom of the outer case 8. . The light emitting device 6 of the present embodiment needs to be supplied with power from the outside, and the starter 62 is provided with a power supply connector 63 to which an external power supply is connected. When a constant voltage is supplied from an external power source, the starter 62 amplifies the voltage until a discharge occurs between the anode electrode 4a and the cathode electrode 4b in the lamp 4, and applies the amplified voltage between the electrodes 4a and 4b. To do. After the discharge is generated between the electrodes 4a and 4b, the voltage amplification function of the starter is automatically stopped. On the other hand, a lamp vertical movement unit 64 is provided on one side surface of the inner case 20, and the inner case 20 moves in the vertical direction by operating the lamp vertical movement unit 64 to align the axis of the lamp. (Details will be described later).
[0023]
3 is a III-III cross-sectional view of the light emitting device 6 shown in FIG. 3 and 2 that each surface of the inner case 20 surrounding the lamp 4 is separated from the outer case 8. Further, as shown in FIG. 3, the inner case 20 is supported by the outer case 8 via the lamp vertical movement portion 64 and the lock portion 66. The lock portion 66 is configured such that the inner case is fixed when the screw 66a is tightened. When the lamp vertical moving portion 64 moves the inner case 20 in the vertical direction, the screw 66a may be loosened. The ramp vertical moving unit 64 includes a rotation shaft 64a, a gear 64b, a rack 64c having teeth provided at a pitch equal to the pitch of the gear 64b, and a fixing member 64d for fixing the rack c and the inner case 20 to each other. It constitutes a pinion mechanism. That is, when the rotating shaft 64a is rotated, the gear 64b is also rotated at the same time, and the inner case 20 is moved in the vertical direction via the rack 64c engaged with the gear 64b, so that the axis of the lamp 4 can be adjusted.
[0024]
Next, a method of attaching the lamp 4 to the lamp house 2 will be described with reference to FIG. When replacing the lamp 4, the stopper 28 is rotated counterclockwise to unlock the lamp 4, and then the base 24 is slid forward to the lamp replacement position, that is, the position where the lamp 4 comes out of the outer case 8. . The anode side of the lamp 4 is fixed to the anode heat dissipating plate 32 by tightening the knurled screw 68a, and the cathode side of the lamp 4 is fixed to the cathode fixing plate 30 by tightening the knurled screw 68b. The cathode fixing plate 30 to which the lamp 4 is attached is screwed to the lamp horizontal moving portion 72 with a screw 70. In the lamp house 2 of the present embodiment, since the base 24 can be slid to the position where the lamp 4 comes out of the outer case 8, the outer case 8 and the inner case 20 are not disturbed when the lamp 4 is replaced. The lamp can be installed and removed smoothly.
[0025]
FIG. 5 is a plan view of the base 24 as viewed from above. A screw member 74 having a shaft portion 74 b formed with a thread at a predetermined pitch is screwed into the female screw portion 73 of the base 24, and a disk-shaped fixing plate fixed to the tip of the screw member 74. 74a is embedded in the lamp horizontal movement portion 72 so as to be rotatable. The fixed plate 74a is configured to be rotatable with respect to the ramp horizontal moving portion 72, but hardly moves in the circumferential direction of the fixed plate 74a and the axial direction of the shaft portion 74b. When a hexagonal wrench or the like is inserted into the adjustment hole 76 (see FIG. 4) opened in the base 76 and the screw member 74 is rotated, the lamp horizontal moving part 72 is rotated in more detail in the axial direction of the shaft part 74b. Moves in the horizontal direction and in a direction perpendicular to the line connecting the reflecting mirror 44 and the exit window 12 (see FIG. 4).
[0026]
That is, in the light emitting device 6 of this embodiment, the position of the lamp 4 in the vertical direction can be adjusted by the rack and pinion mechanism that is the lamp vertical moving unit 64 (see FIG. 3), and the lamp 4 is moved by the lamp horizontal moving unit 72. Can be adjusted in the horizontal direction (see FIG. 5). By the way, a so-called XY stage or the like, which has been conventionally provided with an X-direction and Y-direction position adjustment mechanism, has a complicated mechanism, and there is a limit to downsizing. Therefore, for example, when the XY stage is built in the lamp house as in the present embodiment, the sizes of the inner case 20 and the outer case 8 are also increased. However, in the light emitting device 6 of the present embodiment, the mechanism for moving the lamp 4 in the horizontal direction and the vertical direction is not integrated, and the lamp horizontal moving unit 72 and the lamp vertical moving unit 64 are separately arranged. The mechanism can be made compact, and the inner case 20 and the outer case 8 can be downsized. In particular, as shown in FIG. 3, the entire apparatus can be further downsized by denting the portion of the inner case 20 to which the lamp vertical movement portion 64 is attached in the direction of the lamp 4.
[0027]
The effect of downsizing the lamp house 2 due to the separate arrangement of the lamp horizontal moving part 72 and the lamp vertical moving part 64 can be obtained without the inner case 20. For example, instead of the inner case 20, a slide plate standing on the base 24 may be provided, and the fixing member 64d of the lamp vertical movement unit 64 may be attached to the slide plate. Further, instead of a plate, a rod-shaped member may be used, and further, the fixing member 64 d may be attached to a member such as a frame surrounding the lamp 4.
[0028]
Next, operation | movement of the light emission apparatus 6 which concerns on this embodiment is demonstrated using FIG. By irradiating a sample such as a transparent plate with light emitted from the light emitting device 6 and projecting the irradiated light on a screen, it is possible to inspect scratches or dust on the transparent plate. When performing such an inspection or experiment, the aperture member 90 is removed. When an external power supply is connected to the power supply connector 63 and power is supplied, the starter 62 amplifies the supply voltage, and the amplified voltage is applied between the anode electrode 4a and the cathode electrode 4b. If the amplified voltage is continuously applied and discharge occurs between the electrodes 4a and 4b, the voltage amplification function of the starter 62 is stopped, and the power from the external power source is applied as it is between the electrodes 4a and 4b.
[0029]
After the discharge is generated in the lamp 4 in this way, the light that has passed through the opening of the diaphragm plate 54 out of the radiated light generated by the discharge passes through the ultraviolet cut filter 84 after being emitted from the emission window 12. The sample is irradiated. Similarly, the light reflected by the reflection mirror 44 is emitted from the emission window 12 and then passes through the ultraviolet cut filter 84 and is irradiated on the sample. Here, since the ultraviolet rays contained in the direct light emitted from the lamp 4 and the reflected light reflected by the reflecting mirror 44 are cut by the ultraviolet cut filter 84, it is possible for an inspector or the like who has seen the emitted light from the light emitting device 6. It is safe.
[0030]
Next, the optical axis adjustment process when the lamp 4 is replaced with a new one will be described with reference to FIG. When adjusting the optical axis of the lamp 4, first, the aperture member 90 is attached to the lamp house 2. In addition, a screen S for projecting light emitted from the light emitting device 6 is disposed. Next, a discharge is generated between the anode electrode 40a and the cathode electrode 40b, and the emitted light is projected onto the screen S. In the present embodiment, the direct light from the lamp 4 and the reflected light reflected by the reflecting mirror 44 are projected onto the screen S.
[0031]
When the bright spot of the reflection mirror 44 overlaps the tip of the cathode electrode 40b, the temperature of the cathode electrode 40b rises and the electron emitting material impregnated inside may evaporate. For this reason, it is necessary to adjust the position of the lamp 4 so that the two projected images on the screen S are separated to some extent. On the other hand, if the two projected images are separated too much, the output distribution of the emitted light will not be uniform. For these reasons, it is necessary to accurately adjust the optical axis of the lamp 4. Here, in the present embodiment, direct light and reflected light from the lamp 4 projected onto the screen S are narrowed down by the aperture 92 having an opening area smaller than that of the exit window 12 and have high directivity. For this reason, the outline of each projection image on the screen S becomes relatively clear and easy to see, and the optical axis of the lamp 4 can be easily adjusted.
[0032]
As mentioned above, although the invention made | formed by this inventor was concretely demonstrated based on embodiment, this invention is not limited to the said embodiment. For example, the lamp may be a mercury xenon lamp or the like instead of a xenon lamp.
[0033]
【The invention's effect】
As described above, according to the lamp house and the light emitting device according to the present invention, the ultraviolet light contained in the light emitted from the lamp and the reflected light reflected by the reflecting mirror is cut by the ultraviolet cut filter. It is safe for those who have seen. Further, by attaching an aperture member having an aperture whose opening area is smaller than that of the exit window to the lamp house, direct light from the lamp and reflected light from the reflection mirror are narrowed by the aperture, and directivity is increased. Thus, when the direct light from the lamp that has passed through the aperture and the reflected light from the reflecting mirror are projected onto, for example, a screen or the like, the outline of each projected image becomes relatively clear and the optical axis can be easily adjusted.
[Brief description of the drawings]
FIG. 1 is an overall perspective view showing a light emitting device in which a xenon lamp is accommodated in a lamp house according to the present invention.
2 is a sectional view of the light emitting device shown in FIG. 1 taken along the line II-II.
3 is a cross-sectional view of the light emitting device shown in FIG. 2 taken along the line III-III.
FIG. 4 is a perspective view used for explaining a method of attaching a lamp to a lamp house.
FIG. 5 is a plan view of the base of the lamp house according to the present invention.
FIG. 6 is a diagram used for explaining a process of adjusting an optical axis of a lamp.
[Explanation of symbols]
2 ... lamp house, 4 ... xenon, 6 ... light emitting device, 8 ... outer case, 10 ... side cover, 12 ... exit window, 14 ... air inlet, 18 ... cooling fan, 20 ... inner case, 22 ... rail, 24 ... Base, 26 ... Inner case cover, 28 ... Stopper, 30 ... Cathode fixing plate, 32 ... Anode heat radiating plate, 36 ... Light passage port, 40a ... Anode electrode, 40b ... Cathode electrode, 42 ... Mirror housing hole, 44 Reflecting mirror 46 Mirror housing section 48 Air circulation space section 54 Stop plate 62 Starter 64 64 lamp vertical moving section 64 a Pinion 64 c Rack 72 72 horizontal lamp moving section 82 Flange, 84... UV cut filter, 85... Filter part, 90... Aperture member, 92.

Claims (2)

In the lamp house where the lamp is housed,
A reflecting mirror that reflects a portion of the light emitted by the lamp;
An outer case disposed at a position facing the reflection mirror via the lamp and having an emission window from which the light emitted by the lamp and the reflected light reflected by the reflection mirror are emitted;
An ultraviolet cut filter that cuts ultraviolet rays contained in the light emitted from the lamp and the reflected light reflected by the reflecting mirror ;
An aperture member having an aperture area smaller than the exit window and having an aperture through which the light emitted from the lamp and the reflected light pass ;
An inner case provided in the outer case and containing the lamp;
An air circulation space formed between the inner case and the outer case, and for circulating air flowing in from the outside;
A flange screwed to the outer surface of the outer case where the exit window is formed;
The flange is attached with a filter portion in which the ultraviolet cut filter is fitted,
The lamp house , wherein the aperture member is detachably attached to the filter portion by a screw portion formed on the aperture member and the filter portion .   A light emitting device, wherein a lamp is installed in the lamp house according to claim 1.

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