JP2007188669A - Lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the reflecting surface of a reflector look brighter. <P>SOLUTION: The lighting device is equipped with a lens 2 having a reflecting surface 2d to reflect the light from a light source 1, and has a reflector 3 having reflecting surface 3a to reflect the light from the light source 1 and the light from the reflecting surface 2d arranged on the opposite side of the lens 2 with a spacing from main optical axis LO of the light source 1. The reflecting surface 2d of the lens 2 is formed so that the points on the reflecting surface 2d of the lens 2 may become closer to the main optical axis LO of the light source 1 as they become farther from the light source 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an illuminating device in which the reflecting surfaces of two reflecting members are arranged so as to sandwich the main optical axis of a light source, and more particularly to an illuminating device that can make the reflecting surfaces of reflecting members appear bright.

  Specifically, the present invention includes a first reflecting member having a reflecting surface for reflecting light from the light source, and reflects the light from the light source and the reflecting surface of the first reflecting member. The 2nd reflection member provided with the reflective surface is related with the illuminating device arrange | positioned on the opposite side of the 1st reflection member across the main optical axis line of the light source.

  In particular, the present invention relates to a lighting device that can make the reflecting surface of the second reflecting member appear bright.

  Conventionally, a first reflection member having a reflection surface for reflecting light from an LED (light source) is provided, and light from the LED (light source) and light from the reflection surface of the first reflection member are reflected. A light irradiating device (illuminating device) is known in which a second reflecting member having a reflecting surface is disposed on the opposite side of the first reflecting member across the main optical axis of an LED (light source). As an example of this type of light irradiation device (illumination device), for example, there is one described in FIG. 1 of JP-A-2005-283563.

  In the light irradiation device (illumination device) described in FIG. 1 of JP-A-2005-283563, a side plate as a first reflecting member is provided on the right side of the main optical axis of the LED (light source), and the LED (light source) A side plate as a second reflecting member is provided on the left side of the main optical axis.

  Therefore, in the light irradiation device (illumination device) described in FIG. 1 of JP-A-2005-283563, a part of the light emitted from the LED (light source) is on the right side of the main optical axis of the LED (light source). The reflected light is reflected by the reflecting surface of the side plate (first reflecting member), and then the reflected light is reflected by the reflecting surface of the side plate (second reflecting member) on the left side of the main optical axis of the LED (light source). Light is irradiated in the light irradiation direction (specifically, the upper right side in FIG. 1 of JP-A-2005-283563). Also, part of the light emitted from the LED (light source) is reflected by the reflecting surface of the side plate (second reflecting member) on the left side of the main optical axis of the LED (light source), and the reflected light is reflected in the light irradiation direction ( Specifically, the light is irradiated on substantially the upper side of FIG. 1 of JP-A-2005-283563.

  By the way, in the light irradiation apparatus (illumination apparatus) described in FIG. 1 of Unexamined-Japanese-Patent No. 2005-283563, the point on the reflective surface of the side plate (1st reflection member) on the right side of the main optical axis line of LED (light source) is The reflecting surface of the side plate (first reflecting member) on the right side of the main optical axis of the LED (light source) is formed so as to move away from the main optical axis of the LED (light source) as the distance from the LED (light source) increases. That is, in FIG. 1 of Japanese Patent Application Laid-Open No. 2005-283563, the longitudinal sectional curve of the reflection surface of the side plate (first reflection member) on the right side of the main optical axis of the LED (light source) is raised to the right.

  Therefore, in the light irradiation device (illumination device) described in FIG. 1 of JP-A-2005-283563, the LED (light source) is reflected from the reflection surface of the side plate (first reflection member) on the right side of the main optical axis of the LED (light source). The incident angle of the light incident on the reflecting surface of the side plate (second reflecting member) on the left side of the main optical axis is relatively large. That is, in the light irradiation device (illumination device) described in FIG. 1 of JP-A-2005-283563, light from the reflection surface of the side plate (first reflection member) on the right side of the main optical axis of the LED (light source) is transmitted. 1 does not proceed to the left in FIG. 1 of JP 2005-283563 A, but proceeds to the upper left in FIG. 1 of JP 2005-283563 A, and the main optical axis of the LED (light source) at a relatively large incident angle. It has entered the reflective surface of the left side plate (second reflective member).

  As a result, in the light irradiation device (illumination device) described in FIG. 1 of JP-A-2005-283563, the light is reflected by the reflection surface of the side plate (second reflection member) on the left side of the main optical axis of the LED (light source). The reflection angle of light from the reflecting surface of the right side plate (first reflecting member) on the right side of the main optical axis of the LED (light source) is also relatively large, so that the left side of the main optical axis of the LED (light source) The density of light from the reflecting surface of the side plate (first reflecting member) on the right side of the main optical axis of the LED (light source) reflected by the reflecting surface of the side plate (second reflecting member) of the LED becomes low.

  Therefore, in the light irradiation device (illumination device) described in FIG. 1 of JP-A-2005-283563, the reflection surface of the side plate (second reflection member) on the left side of the main optical axis of the LED (light source) is light. It looks dark from the irradiation direction (upper side of FIG. 1 of JP-A-2005-283563).

JP 2005-283563 A

  In view of the above problems, an object of the present invention is to provide an illuminating device that can make a reflecting surface of a reflecting member appear bright.

  According to the first aspect of the present invention, the first reflecting member including the reflecting surface for reflecting the light from the light source is provided, the light from the light source and the light from the reflecting surface of the first reflecting member. In a lighting device in which a second reflecting member having a reflecting surface for reflecting light is disposed on the opposite side of the first reflecting member across the main optical axis of the light source, the first reflecting member is configured by a lens. In addition, a reflective surface of the first reflective member is configured by the surface of the lens, and the first reflective member has a reflective surface that approaches a main optical axis of the light source as the point on the reflective surface of the first reflective member moves away from the light source. An illuminating device characterized in that a reflecting surface of a reflecting member is formed is provided.

  According to the second aspect of the present invention, the reflecting surface of the first reflecting member is formed so that the light from the light source reflected by the reflecting surface of the first reflecting member is returned to the light source side. The lighting device according to claim 1 is provided.

  According to a third aspect of the present invention, a refracting surface for refracting light from the light source reflected by the reflecting surface of the first reflecting member so as to return to the light source side is provided on the surface of the lens. The illumination device according to claim 1 or 2 is provided.

  According to a fourth aspect of the present invention, a lens cut is formed on the refracting surface for refracting the light from the light source reflected by the reflecting surface of the first reflecting member back to the light source side. The lighting device according to claim 3 is provided.

  In the illumination device according to claim 1, the first reflecting member for reflecting the light from the light source to the reflecting surface of the second reflecting member is constituted by a lens. Further, the reflection surface of the first reflection member is constituted by the surface of the lens. Furthermore, the reflecting surface of the first reflecting member is formed so that a point on the reflecting surface of the first reflecting member approaches the main optical axis of the light source as it moves away from the light source.

  Therefore, according to the illuminating device of the first aspect, the reflection surface of the first reflection member is formed so that the point on the reflection surface of the first reflection member moves away from the main optical axis of the light source as it moves away from the light source. The incident angle of light incident on the reflecting surface of the second reflecting member from the reflecting surface of the first reflecting member can be made smaller than in the case.

  In other words, according to the illumination device of the first aspect, the reflecting surface of the first reflecting member is formed so that the point on the reflecting surface of the first reflecting member is further away from the main optical axis of the light source as it is farther from the light source. The reflection angle of light from the reflection surface of the first reflection member reflected by the reflection surface of the second reflection member can be made smaller than the case where the reflection surface of the second reflection member is reflected. The density of the light from the reflecting surface of the caulked first reflecting member can be increased.

  As a result, according to the illuminating device of claim 1, the reflecting surface of the first reflecting member is formed such that the point on the reflecting surface of the first reflecting member moves away from the main optical axis of the light source as the point moves away from the light source. The reflecting surface of the second reflecting member can be made brighter than in the case where the second reflecting member is present.

  In the illumination device according to claim 2, the reflection surface of the first reflection member is formed so that light from the light source reflected by the reflection surface of the first reflection member is returned to the light source side.

  Therefore, according to the illuminating device of claim 2, the reflecting surface of the first reflecting member is formed so that the light from the light source reflected by the reflecting surface of the first reflecting member travels away from the light source. The incident angle of light incident on the reflecting surface of the second reflecting member from the reflecting surface of the first reflecting member can be made smaller than in the case where the first reflecting member is present.

  As a result, according to the illuminating device of claim 2, the second reflecting member of the second reflecting member is formed such that the longitudinal sectional curve of the reflecting surface of the second reflecting member and the main optical axis of the light source form a large angle of 45 ° or more, for example. Even when the reflecting surface is formed, the reflecting surface of the second reflecting member can appear bright.

  In the illumination device according to claims 3 and 4, a refracting surface for refracting light from the light source reflected by the reflecting surface of the first reflecting member so as to return to the light source side is formed on the surface of the lens. ing. Preferably, a lens cut for refracting the light from the light source reflected by the reflecting surface of the first reflecting member to return to the light source side is formed on the refracting surface.

  Therefore, according to the illumination device according to claim 3 and 4, than the case where the surface of the lens is formed so that the light from the light source reflected by the reflecting surface of the first reflecting member is allowed to pass through, The incident angle of light incident on the reflecting surface of the second reflecting member from the reflecting surface of the first reflecting member can be reduced.

  As a result, according to the illumination device according to claim 3 and 4, the second reflection is performed so that the longitudinal sectional curve of the reflecting surface of the second reflecting member and the main optical axis of the light source form a large angle of, for example, 45 ° or more. Even when the reflection surface of the member is formed, it is possible to make the reflection surface of the second reflection member appear bright.

  Hereinafter, a first embodiment of the illumination device of the present invention will be described. FIG. 1 is a schematic cross-sectional view of the illumination device of the first embodiment. In FIG. 1, reference numeral 1 denotes a light source such as an LED. Reference numeral 2 denotes a lens as a first reflecting member formed of a transparent or translucent material for reflecting light from the light source 1. Reference numeral 2d denotes a reflecting surface formed on the lens 2 in order to reflect light from the light source 1. The reflection surface 2d is constituted by a part of the surface of the lens 2, and is formed so that the light from the light source 1 can be totally reflected. Reference numeral 3 denotes a reflector as a second reflecting member for reflecting the light from the light source 1 and the light from the lens 2. Reference numeral 3a denotes a reflecting surface formed on the reflector 3 in order to reflect the light from the light source 1 and the light from the lens 2. Reference numeral 4 denotes a cover formed of a transparent or translucent material.

  In the illumination device of the first embodiment, as shown in FIG. 1, the reflecting surface 3 a of the reflector 3 is arranged on the opposite side of the reflecting surface 2 d of the lens 2 with the main optical axis L <b> 0 of the light source 1.

  2 and 3 are parts diagrams of the lens 2 shown in FIG. Specifically, FIG. 2 is a cross-sectional view of the lens 2 shown in FIG. 1, and FIG. 3 is a perspective view of the lens 2 shown in FIG. As shown in FIG. 2, in the illuminating device of the first embodiment, the lens 2 is formed in a shape in which a part 2a on the bottom surface and a part 2b on the left side are cut out from a substantially conical member as shown by a broken line. Has been.

  In the illumination device of the first embodiment, the lens 2 is formed by molding, for example. However, in the illumination device of the second embodiment, the lens 2 can be formed by shaving instead.

  In FIG. 2, reference numeral 2 c denotes an input surface for allowing light emitted from the light source 1 (see FIG. 1) to enter the lens 2. Reference numeral 2e denotes a first refracting surface for refracting light from the light source 1 reflected by the reflecting surface 2d. Reference numeral 2f denotes a first light for passing light emitted from the light source 1 to the reflector 3 (see FIG. 1) side (left side in FIG. 1) from the main optical axis L0 (see FIG. 1) of the light source 1. 2 shows a birefringent surface. Reference numeral 2g denotes a coupling surface for bridging the reflecting surface 2d and the first refracting surface 2e.

  As shown in FIG. 3, in the illuminating device of the first embodiment, a plurality of lenses 2 are bridged together by a joint 2h to form one lens unit 2 ′. In the illumination device of the form, it is also possible to use a plurality of lenses 2 separated from each other instead. Alternatively, only one lens 2 can be used in the illumination device of the fourth embodiment.

  4 and 5 are component diagrams of the reflector 3 shown in FIG. Specifically, FIG. 4 is a cross-sectional view of the reflector 3 shown in FIG. 1, and FIG. 5 is a side view of the reflector 3 shown in FIG. 1 viewed from the right side of FIG. In the illuminating device of 1st Embodiment, as shown in FIG. 5, the some reflective surface 3a is provided corresponding to the some lens 2 shown in FIG. On the other hand, although not shown, in the illumination device of the fourth embodiment, only one reflecting surface 3 a is provided on the reflector 3 corresponding to only one lens 2.

  In the illumination device of the first embodiment, each of the plurality of reflecting surfaces 3a of the reflector 3 is configured to have the same shape. However, in the illumination device of the fifth embodiment, the plurality of reflections of the reflector 3 are configured. Each of the surfaces 3a can be configured to have a different shape.

  FIG. 6 is a diagram illustrating an optical path of light emitted from the light source 1 of the lighting apparatus according to the first embodiment. In the illuminating device of the first embodiment, as shown in FIG. 6, out of the light emitted from the light source 1, the light L1 emitted upward in FIG. 6 along the main optical axis L0 of the light source 1 First, it is passed through the input surface 2c (see FIG. 2) of the lens 2 with almost no change in orientation, and then passed through the coupling surface 2g (see FIG. 2) of the lens 2 with little change in orientation. 1 is irradiated upward along the main optical axis L0.

  Furthermore, in the illumination device of the first embodiment, as shown in FIG. 6, among the light emitted from the light source 1, the light L <b> 2 emitted upward in FIG. 6 is first input to the lens 2. 6 is passed through the surface 2c (see FIG. 2), then through the second refracting surface 2f (see FIG. 2) of the lens 2, and then reflected by the reflecting surface 3a of the reflector 3, substantially upward in FIG. Is irradiated. Of the light emitted from the light source 1, the light L3 emitted upward in the left direction in FIG. 6 is first passed through the input surface 2c of the lens 2 and then the second refractive surface 2f of the lens 2. Then, the light is reflected by the reflecting surface 3a of the reflector 3 and irradiated substantially upward in FIG.

  On the other hand, in the illuminating device of the first embodiment, as shown in FIG. 6, among the light radiated from the light source 1, the light L4 radiated in the upper right direction in FIG. The light is allowed to pass through the surface 2c (see FIG. 2), and then reflected by the reflecting surface 2d of the lens 2 toward the upper left in FIG. Next, the reflected light L4 is refracted almost leftward in FIG. 6 by the first refracting surface 2e of the lens 2 (see FIG. 2). Next, the refracted light L4 is reflected by the reflecting surface 3a of the reflector 3, and is irradiated upward in FIG. Of the light emitted from the light source 1, the light L5 emitted in the upper right direction in FIG. 6 is first passed through the input surface 2 c of the lens 2, and then is reflected by the reflecting surface 2 d of the lens 2. 6 is reflected almost to the left. Next, the reflected light L5 is refracted slightly leftward in FIG. 6 by the first refracting surface 2e of the lens 2. Next, the refracted light L5 is reflected by the reflecting surface 3a of the reflector 3, and is irradiated upward in FIG.

  In the illumination device of the first embodiment, as shown in FIGS. 1 and 6, the lens 2 is arranged such that a point on the reflection surface 2 d of the lens 2 approaches the main optical axis L <b> 0 of the light source 1 as it moves away from the light source 1. The reflection surface 2d is formed. In other words, the vertical cross-sectional curve of the reflecting surface 2d of the lens 2 is lowered to the right.

  Therefore, according to the illuminating device of 1st Embodiment, it is the right side of the main optical axis line of LED (light source) like the light irradiation apparatus (illuminating device) described in FIG. 1 of Unexamined-Japanese-Patent No. 2005-283563, for example. The side plate on the right side of the main optical axis of the LED (light source) so that the point on the reflecting surface of the side plate (first reflecting member) is further away from the main optical axis of the LED (light source) as the distance from the LED (light source) increases. As shown in FIG. 6, the incident angle θ1 of the light L4 incident on the reflecting surface 3a of the reflector 3 and the reflecting surface 3a of the reflector 3 are incident as compared with the case where the reflecting surface of the first reflecting member) is formed. The incident angle θ2 of the light L5 to be reduced can be reduced.

  That is, according to the illumination device of the first embodiment, the right side of the main optical axis of the LED (light source), for example, the light irradiation device (illumination device) described in FIG. 1 of JP-A-2005-283563. As shown in FIG. 6, the incident angle θ <b> 1 of the light L <b> 4 incident on the reflecting surface 3 a of the reflector 3, and the case where the vertical cross-sectional curve of the reflecting surface of the side plate (first reflecting member) of The incident angle θ2 of the light L5 incident on the reflecting surface 3a of the reflector 3 can be reduced.

  In other words, according to the illumination device of the first embodiment, the main optical axis of the LED (light source), for example, the light irradiation device (illumination device) described in FIG. 1 of JP-A-2005-283563. The reflection of the light L4 reflected by the reflecting surface 3a of the reflector 3, as shown in FIG. 6, as compared with the case where the vertical cross-sectional curve of the reflecting surface of the right side plate (first reflecting member) of the right side plate is upward. The angle (= θ1) can be reduced, whereby the density of the light L4 reflected by the reflecting surface 3a of the reflector 3 can be increased. In addition, the reflection angle (= θ2) of the light L5 reflected by the reflection surface 3a of the reflector 3 can be reduced, thereby increasing the density of the light L5 reflected by the reflection surface 3a of the reflector 3. be able to.

  As a result, according to the illumination device of the first embodiment, the main optical axis of the LED (light source), for example, as in the light irradiation device (illumination device) described in FIG. 1 of JP-A-2005-283563. The reflective surface 3a of the reflector 3 can be seen brighter from the upper side of FIG. 6 than when the vertical cross-sectional curve of the reflective surface of the right side plate (first reflective member) is rising to the right.

  Moreover, in the illuminating device of 1st Embodiment, as shown in FIG. 6, it reflects by the reflective surface 2d of the lens 2 among the light radiated | emitted from the light source 1 toward the upper side of FIG. The reflecting surface 2d and the first refracting surface 2e of the lens 2 are formed so that the light L5 refracted by the first refracting surface 2e (see FIG. 2) is returned to the light source 1 side (the lower side in FIG. 6). Has been.

  Therefore, according to the illuminating device of 1st Embodiment, it is the right side of the main optical axis line of LED (light source) like the light irradiation apparatus (illuminating device) described in FIG. 1 of Unexamined-Japanese-Patent No. 2005-283563, for example. The incident angle θ2 of the light L5 incident on the reflecting surface 3a of the reflector 3 is made larger than when the light from the LED (light source) reflected by the reflecting surface of the side plate (first reflecting member) travels away from the light source. Can be small.

  In the illuminating device of the first embodiment, as shown in FIG. 6, the longitudinal sectional curve of the reflecting surface 3a of the reflector 3 and the main optical axis L0 of the light source 1 form a relatively small angle θ of 30 ° or less. The reflecting surface 3a of the reflector 3 is formed. Although not shown, in the illumination device of the sixth embodiment, instead, the longitudinal sectional curve of the reflecting surface 3a of the reflector 3 and the main optical axis L0 of the light source 1 form a relatively large angle θ of 45 ° or more. It is also possible to form the reflecting surface 3a of the reflector 3. That is, in the illumination device of the sixth embodiment, the height dimension of the reflector 3 (the vertical dimension in FIG. 6) is set smaller than the height dimension of the reflector 3 of the first embodiment.

  Also in the illumination device of the sixth embodiment, in the same way as the illumination device of the first embodiment, the light emitted from the light source 1 is reflected by the reflecting surface 2d of the lens 2 and the first refraction of the lens 2 is performed. The reflecting surface 2d and the first refracting surface 2e of the lens 2 are formed so that the light L5 refracted by the surface 2e is returned to the light source 1 side.

  For this reason, the reflecting surface 3a of the reflector 3 is formed so that the longitudinal sectional curve of the reflecting surface 3a of the reflector 3 and the main optical axis L0 of the light source 1 form a relatively large angle θ of 45 ° or more. Also in the illumination device of the form, the reflecting surface 3a of the reflector 3 can be made to appear bright. That is, according to the illumination device of the sixth embodiment, it is possible to make the reflecting surface 3a of the reflector 3 appear bright while suppressing the height dimension of the reflector 3 (the vertical dimension in FIG. 6).

  In the illumination device of the first embodiment, a lens cut is not provided on the first refractive surface 2e (see FIG. 2) of the lens 2, but in the illumination device of the seventh embodiment, the reflection of the lens 2 is used instead. The lens 2 has a lens cut (not shown) for refracting the light L4 and L5 from the light source 1 reflected by the surface 2d so as to return to the light source 1 side (lower side in FIG. 6). It is also possible to form 2e. In other words, in the illumination device of the seventh embodiment, the orientation control of the lights L4 and L5 is performed by the lens cut (not shown) formed on the first refractive surface 2e of the lens 2.

  Moreover, in the illuminating device of 1st Embodiment, as shown in FIG. 6, the light L5 from the light source 1 reflected by the reflective surface 2d of the lens 2 is returned to the light source 1 side (lower side of FIG. 6). The first refracting surface 2e (see FIG. 2) of the lens 2 is formed as described above. However, in the illumination device of the eighth embodiment, instead of the light source 1 reflected by the reflecting surface 2d of the lens 2, It is also possible to form the first refractive surface 2e of the lens 2 so as to allow the light L5 to pass through. In other words, in the illumination device of the first embodiment, the orientation control of the lights L4 and L5 is performed by the first refractive surface 2e of the lens 2, but in the illumination device of the eighth embodiment, the first of the lens 2 is controlled. The alignment of the lights L4 and L5 is not controlled by the refracting surface 2e.

  In the illuminating device of the first embodiment, as shown in FIG. 6, light L1, L2, L3, L4, L5 emitted from the light source 1 is efficiently distributed, and the reflecting surface 3a of the reflector 3 and the lens 2 are combined. The light is irradiated from the surface 2g (see FIG. 2) (or the second refractive surface 2f of the lens 2). Therefore, according to the illuminating device of 1st Embodiment, bright light can be irradiated to the upper side of FIG.

  Moreover, in the illuminating device of 1st Embodiment, as shown in FIG. 6, light L1, L2, L3, L4, L5 is irradiated to various directions. Therefore, according to the illuminating device of 1st Embodiment, the illuminating device of 1st Embodiment can be made to look bright from various positions.

  In the ninth embodiment, the above-described first to eighth embodiments can be appropriately combined.

  The lighting device of the present invention can be applied to, for example, lighting for presentation of gaming machines, rear combination lamps for automobiles, for example, general lighting such as downlights, wall lighting, ceiling lighting, floor lighting, and the like.

It is a schematic sectional drawing of the illuminating device of 1st Embodiment. FIG. 2 is a component diagram of the lens 2 shown in FIG. 1. FIG. 2 is a component diagram of the lens 2 shown in FIG. 1. FIG. 2 is a component diagram of the reflector 3 shown in FIG. 1. FIG. 2 is a component diagram of the reflector 3 shown in FIG. 1. It is the figure which showed the optical path of the light radiated | emitted from the light source 1 of the illuminating device of 1st Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source 2 Lens 2c Input surface 2d Reflective surface 2e 1st refractive surface 2f 2nd refractive surface 2g Coupling surface 3 Reflector 3a Reflective surface 4 Cover

Claims (4)

  A first reflecting member having a reflecting surface for reflecting light from the light source; and a reflecting surface for reflecting light from the light source and light from the reflecting surface of the first reflecting member. In the illuminating device in which the two reflecting members are arranged on the opposite side of the first reflecting member with the main optical axis of the light source interposed therebetween, the first reflecting member is configured by a lens, and the first reflecting is performed by the surface of the lens. The reflecting surface of the first reflecting member is formed so as to constitute a reflecting surface of the member, and a point on the reflecting surface of the first reflecting member approaches the main optical axis of the light source as it moves away from the light source. A lighting device.   The reflection surface of the first reflection member is formed so that light from the light source reflected by the reflection surface of the first reflection member is returned to the light source side. Lighting equipment.   The refracting surface for refracting the light from the light source reflected by the reflecting surface of the first reflecting member so as to return to the light source side is formed on the surface of the lens. 2. The illumination device according to 2.   The lens cut for refracting the light from the light source reflected by the reflection surface of the first reflection member to return to the light source side is formed on the refraction surface. Lighting equipment.

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