JP4402962B2 - Illumination apparatus, image reading apparatus, and image forming apparatus - Google Patents

Description

  The present invention relates to an illumination device, an image reading device using the illumination device, and an image forming apparatus using the image reading device.

  2. Description of the Related Art Conventionally, an image reading apparatus used in an image forming apparatus such as a copying machine has been known in which a plurality of LEDs (point light sources) are linearly arranged as an illuminating apparatus that illuminates a document (for example, Patent Document 1, 2). Further, when a plurality of LEDs are used as a light source, a transparent resin is provided between the illumination object and the point light source in order to suppress the occurrence of illuminance ripple (irradiance unevenness in the illuminance distribution) in the LED arrangement direction in the illumination object (original). A light collector made of glass or glass is disposed. This condensing body suppresses the generation of illuminance ripple by reflecting light emitted from a plurality of point light sources and diffused in a circular shape so as to be converged linearly along the reading range of the document. .

JP-A-7-162586 Japanese Patent Laid-Open No. 10-322521

  However, in a lighting device having a structure in which a plurality of LEDs and a light collector are provided, the light reflected from the illumination object (reflected light) enters the light collector, and the reflected light is re-reflected in the light collector and again. Re-reflected light (flare light) toward the illumination object is generated. The amount of flare light varies depending on whether the amount of reflected light from the illumination object is large or small, and the amount of illumination light that illuminates the illumination object varies due to the influence of flare light, resulting in a decrease in image reading accuracy. There is a problem.

  A mechanism for variation in the amount of illumination light with respect to the illumination target due to the influence of flare light and a decrease in image reading accuracy will be described with reference to FIGS. 18 and 19, a plurality of LEDs (point light sources) 102 are linearly arranged on a substrate 101, and a condenser 103 is disposed on an optical path from the light emitted from the LEDs 102 to a document D that is an illumination target. Has been placed. The light guide 103 is formed in a long shape along the arrangement direction of the LEDs 102. FIGS. 18B and 19B show the positional relationship between the arrangement direction of the LEDs 102 and the document D. The arrow A direction is the main scanning direction during document reading, and the arrow B direction is during document reading. This is the sub-scanning direction. FIG. 18B shows a case where the entire main scanning direction of the document D is white, and FIG. 19B shows a case where the main scanning direction of the document D is a mixture of white and black.

  Here, a case where the entire document D in the main scanning direction is white as shown in FIG. 19B will be described. The light emitted from each LED 102 is diffused in the main scanning direction as indicated by solid arrows and travels in the light collector 103 to illuminate the a, b, and c regions on the document D in the main scanning direction. Since each of the a, b, and c regions is white, reflected light (reflected light) as indicated by a broken line is generated from the document D in each region. A part of the reflected light enters the light collector 103 and is re-reflected in the light collector 103 to become flare light toward the document D. For example, the area a of the document D is illuminated by the flare lights F1 and F2. The

  Next, a case where the main scanning direction of the document D is a mixture of white and black as shown in FIG. 19B will be described. Light emitted from each LED 102 is diffused as indicated by solid arrows and travels in the light collector 103 to illuminate areas a, b, and c in the main scanning direction on the document D. At this time, reflected light as shown by a broken line is generated from the white a region, but no reflected light is generated from the black b and c regions. For this reason, in the a region, illumination with flare light that causes the reflected light from the b and c regions is not performed.

  That is, in the case of FIG. 18 and FIG. 19, although the a area of the document D is the same white, the amount of light to be illuminated varies depending on whether the surrounding b and c areas are white or black. A difference occurs in the reading result. Specifically, the area a in FIG. 18 is read as white, whereas the area a in FIG. 19 is read as a color having a certain density even though it is white, and is light on the copy. It will exhibit a black color.

  An object of the present invention is to suppress fluctuations in the amount of illumination light with respect to an illumination object due to the influence of flare light, and to suppress a decrease in image reading accuracy due to the influence of flare light.

The illumination device according to claim 1 is arranged in front of a plurality of point light sources that emit light for illuminating an object to be illuminated and arranged linearly, and in the emission direction of the light emitted from the point light source, A light collector that collects light emitted from a point light source in a line shape toward the illumination object, and is positioned on an optical path from the point light source side toward the illumination object, and is reflected from the illumination object A restricting portion that restricts at least one of light and flare light traveling toward the illumination object at a position along the arrangement direction of the point light sources, and the restricting portion includes the illumination on the light collector. The position along the arrangement direction of the point light sources in the light collector and the arrangement of the point light sources, either or both of the surface side facing the object and the surface side of the light collector facing the point light source In a plane that crosses the direction diagonally And it is provided.

Accordingly, at least one of the reflected light from the illumination object and the flare light directed toward the illumination object is restricted by the restriction unit at a position along the arrangement direction of the point light sources, and the flare for illuminating the illumination object by this restriction Light is reduced, and fluctuations in the amount of illumination light with respect to the illumination object due to the influence of flare light are suppressed. Note that the flare light is directly reduced by regulating the flare light, and the flare light generated by the reflection of the reflected light is indirectly reduced by regulating the reflected light. Further, in addition to suppressing fluctuations in the amount of illumination light with respect to the illumination object due to the influence of flare light, the shadow of the restricting portion that is reflected on the illumination object by illumination from a certain point light source is located next to the other. Since the light is canceled by the illumination light from the point light source, the shadow becomes thin, and the light amount ripple in the direction along the arrangement direction of the point light sources on the illumination object caused by the shadow of the restricting portion is reduced.

According to a second aspect of the invention, in the illumination apparatus according to claim 1, wherein the regulating unit is a light-shielding groove in multiple.

  Accordingly, at least one of the reflected light from the illumination object and the flare light directed toward the illumination object hits the light shielding groove, and the progress thereof is restricted. By this restriction, the flare light that illuminates the illumination object is reduced, and the flare light is reduced. The variation in the amount of illumination light with respect to the illumination object due to the influence of. When the light collecting groove is provided in the light collecting body, the light shielding groove can be formed at the same time when the light collecting body is formed using a mold, or the light shielding groove is formed by forming a groove after forming the light collecting body. Grooves can be formed.

According to a third aspect of the invention, the illumination device according to claim 1, wherein the regulating portion is a plurality of light shielding member provided at a position along the arrangement direction of the point light source in the condenser body.

Therefore, at least one of the reflected light from the illumination object and the flare light directed toward the illumination object hits the light shielding member, and the progress thereof is restricted. By this restriction, the flare light that illuminates the illumination object is reduced, and the flare light The variation in the amount of illumination light with respect to the illumination object due to the influence of is suppressed. In the case where the light shielding member is provided on the light collecting body, the light collecting member can be provided on the light collecting body by molding the light collecting body by two-color molding, or a plurality of light collecting body pieces constituting the light collecting body. The light shielding member can be provided on the light collecting body by assembling the light collecting body by alternately putting the light shielding members in the cylindrical member .

Invention of claim 4, wherein, in the illumination apparatus according to claim 1, wherein the regulating portion is a plurality of light absorbing coating surface portion provided at a position along the arrangement direction of the point light source in the condenser body .

Therefore, at least one of the reflected light from the illumination object and the flare light directed toward the illumination object hits the light-absorbing coating surface part, and the progress thereof is restricted, and the flare light that illuminates the illumination object is reduced by this restriction. The fluctuation of the illumination light quantity with respect to the illumination object due to the influence of flare light is suppressed. When providing the light-absorbing coating surface portion on the light collector, the light-absorbing coating surface portion is coated by coating light-absorbing ink or the like on the end surfaces of a plurality of light-collecting body pieces constituting the light collector. The light-absorbing coating surface portion can be provided on the light collecting body by assembling the light-collecting body by placing the light-collecting body piece provided with the light-absorbing coating surface portion into the cylindrical member .

A fifth aspect of the present invention is the illumination device according to the first aspect, wherein the restricting portion is a rib structure having a plurality of ribs provided on a surface side of the light collector that faces the object to be illuminated. .

Accordingly, at least one of the reflected light from the illumination object and the flare light directed toward the illumination object hits the rib of the rib structure, so that the progression is restricted, and this restriction reduces the flare light that illuminates the illumination object. The fluctuation of the illumination light quantity with respect to the illumination object due to the influence of flare light is suppressed .

A lighting device according to a sixth aspect of the present invention is arranged in front of a plurality of point light sources that emit light that is arranged in a straight line and that illuminates an illumination object, and in the emission direction of the light emitted from the point light source, A light collector that collects light emitted from a point light source in a line shape toward the illumination object, and is positioned on an optical path from the point light source side toward the illumination object, and is reflected from the illumination object A restricting portion that restricts at least one of light and flare light traveling toward the illumination object at a position along the arrangement direction of the point light sources, and the restricting portion includes the illumination on the light collector. A plurality of surfaces that are provided along the arrangement direction of the point light sources on the surface side that faces the object and the surface side that faces the point light source in the light collector, and that faces the illumination object in the light collector Front side with the regulating part provided on the side Characterized in that said point the regulating portion provided on the side opposite to the light source are provided in different planes shifted position along the arrangement direction of the point light source in the condenser.

Accordingly, at least one of the reflected light from the illumination object and the flare light directed toward the illumination object is restricted by the restriction unit at a position along the arrangement direction of the point light sources, and the flare for illuminating the illumination object by this restriction Light is reduced, and fluctuations in the amount of illumination light with respect to the illumination object due to the influence of flare light are suppressed. Note that the flare light is directly reduced by regulating the flare light, and the flare light generated by the reflection of the reflected light is indirectly reduced by regulating the reflected light. Further, it is possible to effectively restrict the progress of the reflected light from the illumination object and restrict the progression of the flare light toward the illumination object. Also, compared to the case where the two restricting portions are located on the same plane, the shadows of the two restricting portions that are projected on the illumination object are less overlapped, and the point light sources are arranged along the illumination object. The amount of light ripple in the selected direction is reduced .

The illumination device of the invention according to claim 7 is arranged in front of a plurality of point light sources that emit light for illuminating an illumination object arranged linearly, and in the emission direction of the light emitted from the point light source, A light collector that collects light emitted from a point light source in a line shape toward the illumination object, and is positioned on an optical path from the point light source side toward the illumination object, and is reflected from the illumination object A restriction part for restricting at least one of light and flare light directed toward the illumination object at a position along the arrangement direction of the point light sources, and the restriction part is the point in the light collecting body. A plurality of roughened surface portions provided at positions along the arrangement direction of the light sources .

Accordingly, at least one of the reflected light from the illumination object and the flare light directed toward the illumination object is restricted by the restriction unit at a position along the arrangement direction of the point light sources, and the flare for illuminating the illumination object by this restriction Light is reduced, and fluctuations in the amount of illumination light with respect to the illumination object due to the influence of flare light are suppressed. Note that the flare light is directly reduced by regulating the flare light, and the flare light generated by the reflection of the reflected light is indirectly reduced by regulating the reflected light. Further, when at least one of the reflected light from the illumination object and the flare light directed toward the illumination object is roughened and hits the surface portion, the progress is restricted, and the flare light that illuminates the illumination object is reduced by this restriction, and the flare light is reduced. Variation in the amount of illumination light with respect to the illumination object due to the influence of light is suppressed. When the roughened surface portion is provided on the light collector, the roughened surface portion is provided by performing roughening treatment such as sand breasting or etching on the end surfaces of the plurality of light collector pieces constituting the light collector. A roughened surface portion can be provided on the light collecting body by assembling the light collecting body by putting the light collecting body piece provided with the roughened surface portion into the cylindrical member.

According to an eighth aspect of the present invention, in the illumination device according to the seventh aspect, the roughened surface portion is provided in a plane orthogonal to the arrangement direction of the point light sources .

Therefore, the rough surface portion has a simple structure, and it is easy to form a light collector having the rough surface portion .

According to a ninth aspect of the present invention, in the illumination device according to the seventh aspect , the roughened surface portion is provided in a plane that obliquely intersects with the arrangement direction of the point light sources .

Therefore, in addition to suppressing the fluctuation of the illumination light quantity with respect to the illumination object due to the influence of the flare light described in claim 7, the shadow of the rough surface portion that is reflected on the illumination object by the illumination from a certain point light source. The direction along the arrangement direction of the point light sources on the illumination target that is caused by the shadow of the roughened surface due to the shadow being lightened because it becomes a state canceled by the illumination light from other point light sources located next to each other The light intensity ripple is reduced .

According to a tenth aspect of the present invention, there is provided an image reading apparatus comprising: the illuminating device according to any one of the first to ninth aspects that illuminates a document that is an illumination target; and a photoelectric conversion element that reads reflected light from the document. To do.

  Therefore, according to this image reading apparatus, fluctuations in the amount of illumination light due to the influence of flare light are suppressed on the document that is the object to be illuminated, and deterioration in image reading accuracy due to the influence of flare light is suppressed.

An image forming apparatus according to an eleventh aspect includes the image reading apparatus according to the tenth aspect and an image forming unit that forms an image on a recording medium in accordance with image data read by the image reading apparatus. .

Therefore, according to this image forming apparatus, the image reading with the influence of the flare light suppressed by the image reading apparatus according to the tenth aspect, the image formation with the influence of the flare light suppressed is performed.

According to the illumination device of the first aspect, at least one of the reflected light from the illumination object and the flare light directed to the illumination object is regulated by the regulation unit at a position along the arrangement direction of the point light sources. Therefore, the flare light that illuminates the illumination object can be reduced by this restriction, and the fluctuation of the illumination light quantity with respect to the illumination object due to the influence of the flare light can be suppressed. In addition, since the restricting portion is provided in a plane obliquely intersecting with the arrangement direction of the point light sources, it is possible to suppress variation in the amount of illumination light with respect to the illumination object due to the influence of flare light. The light amount ripple in the direction along the arrangement direction of the point light sources on the illumination target object caused by the shadow of the restricting portion reflected on the object can be reduced.

  According to a second aspect of the present invention, in the illumination device according to the first aspect, the restricting portion is a plurality of light shielding grooves provided at positions along the arrangement direction of the point light sources in the light collector. Therefore, since at least one of the reflected light from the illumination object and the flare light directed toward the illumination object hits the light shielding groove, the progress thereof is restricted, and this restriction reduces the flare light that illuminates the illumination object. Thus, fluctuations in the amount of illumination light with respect to the illumination object due to the influence of flare light can be suppressed.

According to the invention of claim 3, wherein, in have you the lighting apparatus according to claim 1, wherein the regulating portion includes a plurality of light shielding member provided at a position along the arrangement direction of the point light source in the condenser body Therefore, since at least one of the reflected light from the illumination object and the flare light directed toward the illumination object hits the light shielding member, the progress thereof is restricted, and this restriction reduces the flare light that illuminates the illumination object. It is possible to suppress variation in the amount of illumination light with respect to the illumination object due to the influence of flare light .

According to the fourth aspect of the present invention, and have contact to the lighting device according to claim 1, wherein said regulating portion includes a plurality of light absorption is provided at a position along the arrangement direction of the point light source in the condenser body Since it is a painted surface part, at least one of the reflected light from the illumination object and the flare light directed toward the illumination object hits the light-absorbing paint surface part, and its progress is regulated, and the flare that illuminates the illumination object by this regulation Light can be reduced, and fluctuations in the amount of illumination light with respect to the illumination object due to the influence of flare light can be suppressed .

According to the invention of claim 5, wherein, in have you the lighting apparatus according to claim 1, wherein the regulating unit are the rib structure having a plurality of ribs, the glare light and object to be illuminated from the illumination object Since at least one of the flare light to be directed hits the rib of the rib structure, its progress is restricted, so that the restriction can reduce the flare light that illuminates the illumination object, and the illumination object due to the influence of the flare light The fluctuation of the illumination light quantity with respect to can be suppressed .

According to the illumination device of the sixth aspect , at least one of the reflected light from the illumination object and the flare light directed to the illumination object is regulated by the regulation unit at a position along the arrangement direction of the point light sources. Therefore, the flare light that illuminates the illumination object can be reduced by this restriction, and the fluctuation of the illumination light quantity with respect to the illumination object due to the influence of the flare light can be suppressed. In addition, since the restricting portion is provided on the surface side of the light collector facing the illumination object and the surface of the light collector facing the point light source, the reflected light from the illumination object It is possible to effectively control the progress and the control of the flare light traveling toward the illumination object. An array of the point light sources includes the restricting portion provided on the surface side of the light collector facing the object to be illuminated and the restricting portion provided on the surface side of the light collector facing the point light source. Since it is provided in different planes whose positions are shifted along the direction, the amount of light in the direction along the arrangement direction of the point light sources on the illumination object as compared with the case where the two regulating portions are positioned in the same plane Ripple can be reduced .

According to the illumination device of the seventh aspect of the present invention , at least one of the reflected light from the illumination object and the flare light toward the illumination object is restricted by the restriction unit at a position along the arrangement direction of the point light sources. Therefore, the flare light that illuminates the illumination object can be reduced by this restriction, and the fluctuation of the illumination light quantity with respect to the illumination object due to the influence of the flare light can be suppressed. Further, since the restricting portion is a plurality of rough surface portions provided at positions along the arrangement direction of the point light sources in the light collecting body, the reflected light from the illumination object and the flare light toward the illumination object The progression is regulated by at least one of the contact with the roughened surface, and the flare light that illuminates the illumination object can be reduced by this regulation, and the fluctuation of the illumination light quantity with respect to the illumination object due to the influence of the flare light is suppressed. it can.

According to the invention described in claim 8, since the roughened surface portion in the illumination device according to claim 7 is provided in a plane orthogonal to the arrangement direction of the point light sources, the structure of the roughened surface portion is provided. It becomes a simple structure, and it is possible to easily form a light collector having a roughened surface portion .

According to the invention of claim 9, wherein, Contact Keru the roughening surface to the illumination device according to claim 7 wherein is so disposed in a plane that intersects obliquely with respect to the arrangement direction of the point light source, flare light In addition to being able to suppress fluctuations in the amount of illumination with respect to the illumination object due to the influence of the light, the amount of light in the direction along the array direction of the point light sources on the illumination object caused by the shadow of the rough surface portion that is reflected on the illumination object Ripple can be reduced .

According to the image reading apparatus of the tenth aspect of the present invention, since the illuminating device according to any one of the first to ninth aspects illuminates a document that is an illumination object, illumination by the influence of flare light on the document is provided. Variations in the amount of light can be suppressed, and stable image reading can be performed while suppressing a decrease in image reading accuracy due to the influence of flare light.

According to the image forming apparatus of the eleventh aspect of the present invention, since the image reading apparatus of the tenth aspect is provided, an image forming operation can be performed according to the image reading result in which the influence of flare light is suppressed.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic front view showing the internal structure of a full-color copying machine 1 which is an image forming apparatus to which the present invention is applied.

  An image forming unit 3 for forming a color image is provided at the center in the apparatus main body 2 of the copying machine 1. The image forming unit 3 includes four drum-shaped photosensitive members 4 that are spaced apart at equal intervals and arranged in parallel in the horizontal direction, a charging roller 5 that uniformly charges the outer peripheral surface of the photosensitive member 4, and a charging roller 5 An exposure device 6 that forms an electrostatic latent image by exposing the outer peripheral surface of each of the photosensitive members 4 charged in accordance with image data according to the image data, and supplying the toner to the electrostatic latent image to convert the electrostatic latent image into a toner image. A developing device 7 that visualizes the toner image, an intermediate transfer belt 8 to which the toner image on the photoconductor 4 is sequentially transferred, and a cleaning that removes toner remaining on the photoconductor 4 after the transfer of the toner image onto the intermediate transfer belt 8. The apparatus 9 includes a transfer roller 10 that transfers the toner image transferred onto the intermediate transfer belt 8 to the recording medium S, and the like. Note that toner images of different colors (Y: yellow, M: magenta, C: cyan, B: black) are formed on the four photoconductors 4, and the toner images of these colors are formed on the intermediate transfer belt 8. By being transferred, a color toner image is formed on the intermediate transfer belt 8, and the color toner image is transferred to the recording medium S.

  On the upper part of the apparatus main body 2, an ADF 11 that automatically feeds a document D that is an illumination target illuminated by an illumination device described later, a contact glass 12 on which the document D illuminated by the illumination device described later is placed, An image reading device 13 for reading a document automatically fed by the ADF 11 or a document placed on the contact glass 12 is disposed.

  The image reading device 13 includes first and second traveling bodies 14 and 15 that can travel at a speed of 2: 1 parallel to the contact glass 12, a lens 16, a photoelectric conversion element (CCD) 17, and the like. The first traveling body 14 includes an illuminating device 18 for illuminating the document D placed on the contact glass 12 or the document D conveyed by the ADF 11, and reflected by the document D along the reading optical axis. And a first mirror 19 that reflects the reading light that travels in this manner. The second traveling body 15 is equipped with a second mirror 20 and a third mirror 21 that further reflect the light reflected by the first mirror 19. A lens 16 and a CCD 17 are arranged in front of the traveling direction of the reading light sequentially reflected by the first to third mirrors 19, 20, and 21.

  A plurality of, for example, four-stage paper cassettes 24 for storing the recording medium S are provided at the lower part of the apparatus main body 2. The recording media S stored in these paper cassettes 24 are separated and fed one by one by a pickup roller 25 and a feed roller 26, and the separated and fed recording media S are conveyed by a sheet provided in the apparatus main body 2. It is conveyed along the path 27. On the paper conveyance path 27, a registration roller 28, a transfer roller 10, a fixing device 29, a paper discharge roller 30, and the like are disposed.

  In such a configuration, the image forming operation by the copying machine 1 is performed as follows.

  First, the image reading device 13 reads an image of the document D placed on the contact glass 12 or automatically fed by the ADF 11. According to the reading result, laser light corresponding to the image data of each color (yellow Y, magenta M, cyan C, black B) is emitted from the semiconductor laser of the exposure device 6, and the laser light is uniformly distributed by the charging roller 5. An electrostatic latent image is formed by exposing the outer peripheral surface of each charged photoreceptor 4. Each color toner is supplied from each developing device 7 to the electrostatic latent image, whereby each color toner image is formed. The toner image on each photoconductor 4 is sequentially transferred onto an intermediate transfer belt 8 that moves in synchronization with the photoconductor 4, and a color toner image is formed on the intermediate transfer belt 8.

  On the other hand, before and after the start of the image forming operation in the image forming unit 3, the recording medium S is started to be separated and fed from the inside of the sheet cassette 24, and the separated and fed recording medium is conveyed on the sheet conveyance path 27. S is timed by a registration roller 28 that rotates intermittently and is sent to a transfer position between the intermediate transfer belt 8 and the transfer roller 10.

  By feeding the recording medium S to the transfer position between the intermediate transfer belt 8 and the transfer roller 10, the color toner image on the intermediate transfer belt 8 is transferred onto the recording medium S. The recording medium S to which the color toner image has been transferred is continuously conveyed on the paper conveyance path 27, and the color toner image is fixed to the recording medium S in the process in which the recording medium S passes through the fixing device 29. The recording medium S on which the color toner image is fixed is discharged onto a discharge tray 31 by a discharge roller 30.

  Under such a configuration, characteristic portions of the present embodiment will be described.

  FIG. 2 is a front view showing the lighting device 18 and the first mirror 19 mounted on the first traveling body 14. FIG. 3 is an exploded perspective view showing the lighting device 18. The illuminating device 18 is formed of a plurality of point light sources, such as LEDs 32, a light collector 33, a reflecting plate 34, a light shielding plate 35, and the like.

  The LEDs 32 are linearly arranged on the elongated substrate 36 at equal intervals, and the substrate 36 is positioned in a direction in which the plurality of LEDs 32 are arranged along the main scanning direction during image reading.

  The light collector 33 is made of a transparent resin (acrylic, polycarbonate, or the like) or glass, and is disposed in front of the light emitting direction emitted from the LED 32 toward the document D. The light collecting member 33 is diffused and emitted from the LED 32. It is formed in a shape for condensing the emitted light toward the document D in a line. The line direction of the condensed light is a direction along the arrangement direction of the LEDs 32 and is a main scanning direction at the time of image reading and reading. Further, the light collector 33 is fixed directly or indirectly to the substrate 36 so as to be fixed in position with respect to the LED 32.

  The reflection plate 34 has substantially the same length as the substrate 36 and the light collector 33 and is formed in a paraboloid shape in which the side facing the light collector 33 is a concave surface, and the concave surface is a side surface in the longitudinal direction of the light collector 33. It is arrange | positioned facing.

  A plurality of light-shielding grooves 37 that are restricting portions are provided on the surface of the condenser 33 that faces the document D. These light shielding grooves 37 are arranged at the same pitch as the pitch of the LEDs 32 along the arrangement direction of the LEDs 32 (longitudinal direction of the light collecting body 33), and one light shielding groove 37 is provided between two adjacent LEDs 32. Is arranged. Further, these light shielding grooves 37 are provided in a plane orthogonal to the arrangement direction of the LEDs 32.

  Regarding the formation of the light shielding groove 37, when the light collecting body 33 is injection-molded using a mold, the light collecting body is formed by using a mold having a convex portion for forming the light shielding groove 37. The light shielding groove 37 can be formed at the same time as molding 33. Alternatively, the light shielding groove 37 can be formed by forming a groove on the light collecting body 33 after the light collecting body 33 is formed.

  The light-shielding groove 37 reflects the reflected light L1 when the light that is emitted from the LED 32 and passes through the condenser 33 and illuminates the document D is reflected by the document D to become reflected light (reflected light) L1. Functions to regulate progress.

  In such a configuration, FIG. 4 shows a state in which the light diffused and emitted from the LED 32 passes through the condenser 33 to illuminate the document D, and the reflected light L1 is generated from the document D.

  Most of the reflected light L1 reflected by the document D enters the light collecting body 33 and then strikes the light shielding groove 37. The reflected light L1 impinging on the light shielding groove 37 is diffused and its travel is restricted. As a result, it is possible to restrict the reflected light L1 reflected by the document D from being re-reflected in the condenser 33 to become flare light that illuminates the document D, and the flare light is greatly reduced. For this reason, fluctuations in the amount of illumination light on the document D due to the influence of flare light are suppressed, and even when the document D is whitish, a large amount of flare light does not occur. Therefore, the reading accuracy of the document D is improved without being affected by flare light regardless of whether the arrangement direction of the LEDs 32 in the document D (main scanning direction of image reading) is whitish or blackish, and the image according to a highly accurate reading result is improved. By forming an image in the forming unit 3, the quality of the image formed on the recording medium S is improved.

  A second embodiment of the present invention will be described with reference to FIGS. The same parts as those described in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof is also omitted (the same applies to the following embodiments). FIG. 5 is an exploded perspective view showing the lighting device 40, and FIG. 6 is a plan view showing a part of the lighting device 40.

  The basic structure of the present embodiment is the same as that of the first embodiment, and the difference between the present embodiment and the first embodiment is the structure of the lighting device 40. The illuminating device 40 of the present embodiment is formed by a plurality of point light sources such as the LED 32, the light collector 33, the reflecting plate 34, the light shielding plate 35, and the like, similar to the illuminating device 18 of the first embodiment. A plurality of light shielding grooves 41 that are restricting portions are provided on the surface of the light collecting body 33 facing the document D. These light shielding grooves 41 are arranged at the same pitch as the pitch of the LEDs 32 along the arrangement direction of the LEDs 32 (longitudinal direction of the light collecting body 33), and one light shielding groove 37 is provided between two adjacent LEDs 32. However, unlike the light-shielding groove 37 of the first embodiment, it is provided in a plane that obliquely intersects with the arrangement direction of the LEDs 32.

  The formation of the light shielding groove 41 is the same as that described in the first embodiment. When the light collector 33 is injection-molded using a mold, the light shielding groove 41 is formed. By using a mold having a convex portion, the light shielding groove 41 can be formed at the same time as the condenser 33 is molded. Alternatively, the light shielding groove 41 can be formed by forming a groove on the light collecting body 33 after the light collecting body 33 is formed.

  The light shielding groove 41 has the same function as the light shielding groove 37 of the first embodiment (see FIG. 4), and the light emitted from the LED 32 and transmitted through the condenser 33 to illuminate the original D is original. When reflected by D and becomes reflected light (reflected light) L1, it functions to regulate the progress of the reflected light L1.

  In such a configuration, most of the reflected light L1 reflected by the document D hits the light shielding groove 41 after entering the light collecting body 33, and the reflected light L1 impinging on the light shielding groove 41 is diffused and diffused. Progress is regulated (see FIG. 4). As a result, the reflected light L1 reflected from the document D is restricted from being re-reflected in the condenser 33 to become flare light that illuminates the document D, and the flare light is greatly reduced. For this reason, fluctuations in the amount of illumination light on the document D due to the influence of flare light are suppressed, and even when the document D is whitish, a large amount of flare light does not occur. Therefore, the reading accuracy of the document D is improved without being affected by flare light regardless of whether the arrangement direction of the LEDs 32 in the document D (main scanning direction of image reading) is whitish or blackish, and the image according to a highly accurate reading result is improved. By forming an image in the forming unit 3, the quality of the image formed on the recording medium S is improved.

  Further, in the present embodiment, since the light shielding groove 41 is provided in a plane that obliquely intersects with the arrangement direction of the LEDs 32, the light shielding groove 41 that is copied to the document D by illumination from a certain LED 32. The shadow of the light-shielding groove 41 that is projected onto the document D by the illumination from the two adjacent LEDs 32 overlaps the document D by the illumination light from the other adjacent LEDs 32. Disappear. As a result, the shadow of the light shielding groove 41 on the document D becomes thin, and the light amount ripple in the direction along the arrangement direction of the LEDs 32 on the document D caused by the shadow of the light shielding groove 41 is reduced.

  A third embodiment of the present invention will be described with reference to FIG. The basic structure of the present embodiment is the same as that of the first embodiment, and the difference between the present embodiment and the first embodiment is the structure of the lighting device 42. The illumination device 42 of the present embodiment is formed by a plurality of point light sources such as the LED 32, the light collector 33, the reflection plate 34, the light shielding plate 35, and the like, similar to the illumination device 18 of the first embodiment. The light collecting body 33 is provided with a plurality of light shielding grooves 43 that are restricting portions. These light shielding grooves 43 are arranged at the same pitch as the pitch of the LEDs 32 along the arrangement direction of the LEDs 32 (longitudinal direction of the light collector 33), and one light shielding groove 33 is provided between two adjacent LEDs 32. Is further provided in a plane perpendicular to the arrangement direction of the LEDs 32. However, unlike the light shielding groove 37 of the first embodiment, the light shielding groove 43 is provided on the surface side of the light collector 33 facing the LED 32.

  The formation of the light shielding groove 43 is the same as that described in the first embodiment. When the light collector 33 is injection-molded using a mold, the light shielding groove 43 is formed. By using a mold having a convex portion, the light shielding groove 43 can be formed at the same time as the condenser 33 is molded. Alternatively, the light shielding groove 43 can be formed by forming a groove on the light collecting body 33 after the light collecting body 33 is formed.

  In the light shielding groove 43, light emitted from the LED 32 and transmitted through the light collecting body 33 to illuminate the original D is reflected by the original D to be reflected light (reflected light) L1, and the reflected light L1 is reflected by the light collecting body. When the flare light L2 is re-reflected in the light 33, the function of the flare light L2 is restricted.

  In such a configuration, when the reflected light L1 reflected by the document D is re-reflected in the condenser 33 and becomes flare light L2 toward the document D, most of the flare light L2 is a light shielding groove 43. In this case, the flare light L2 impinging on the light shielding groove 43 is diffused and its progress is restricted. Thereby, the flare light L2 that illuminates the document D is greatly reduced. For this reason, fluctuations in the amount of illumination light on the document D due to the influence of the flare light L2 are suppressed, and even when the document D is whitish, a large amount of flare light does not occur. Therefore, the reading accuracy of the document D is improved without being affected by flare light regardless of whether the arrangement direction of the LEDs 32 in the document D (main scanning direction of image reading) is whitish or blackish, and the image according to a highly accurate reading result is improved. By forming an image in the forming unit 3, the quality of the image formed on the recording medium S is improved.

  In the present embodiment, the case where the light shielding groove 43 is provided in the plane orthogonal to the arrangement direction of the LEDs 32 is described as an example. However, as described in the second embodiment, the light shielding groove 43 is provided. You may provide the groove | channel 43 in the surface which cross | intersects diagonally with respect to the arrangement direction of LED32. In this case, the shadow of the light shielding groove 43 that is copied onto the document D by the illumination from a certain LED 32 is canceled by the illumination light from the other LEDs 32 that are located next to each other. The shadow of the light-shielding groove 43 that is copied onto the document D due to the illumination is not overlapped on the document D. As a result, the shadow of the light shielding groove 43 on the document D becomes thin, and the light amount ripple in the direction along the arrangement direction of the LEDs 32 on the document D caused by the shadow of the light shielding groove 43 is reduced.

  A fourth embodiment of the present invention will be described with reference to FIG. In the illumination device 44 of the present embodiment, a light shielding groove 37 is provided on the surface side of the light collecting body 33 facing the document D, and the light shielding groove 43 is also formed on the surface side of the light collecting body 33 facing the LED 32. Is provided.

  Therefore, it is possible to restrict the travel of the reflected light L1 from the document D (see FIG. 4) and restrict the travel of the flare light L2 toward the document D (see FIG. 7). For this reason, fluctuations in the amount of illumination light on the document D due to the influence of flare light are suppressed, and even when the document D is whitish, a large amount of flare light does not occur. Therefore, the reading accuracy of the document D is improved without being affected by flare light regardless of whether the arrangement direction of the LEDs 32 in the document D (main scanning direction of image reading) is whitish or blackish, and the image according to a highly accurate reading result is improved. By forming an image in the forming unit 3, the quality of the image formed on the recording medium S is improved.

  A fifth embodiment of the present invention will be described with reference to FIG. In the illuminating device 45 of the present embodiment, as in the fourth embodiment, the light shielding groove 37 positioned on the surface side of the light collector 33 facing the document D and the LED 32 of the light collector 33 are opposed. A light shielding groove 43 located on the surface side is provided. These light shielding grooves 37 and 43 are provided in different planes whose positions are shifted along the arrangement direction of the LEDs 32.

  Therefore, in the present embodiment, as described in the fourth embodiment, the progression of the reflected light L1 from the document D (see FIG. 4) and the progression of the flare light L2 toward the document D (see FIG. 4). 7), the reading accuracy of the document D can be improved without being affected by flare light regardless of whether the arrangement direction of the LEDs 32 in the document D (main scanning direction of image reading) is whitish or dark. The quality of the image formed on the recording medium S is improved by forming an image in the image forming unit 3 according to a high reading result.

  Further, compared to the case where the two light shielding grooves 37 and 43 are located on the same plane, the shadows of the two light shielding grooves 37 and 43 projected on the document D are reduced, and the LED 32 on the document D is reduced. The amount of light ripple in the direction along the arrangement direction is reduced. Further, it is possible to make the height dimension of the light shielding grooves 37 and 43 larger than when the two light shielding grooves 37 and 43 are located in the same plane, and the reflected light L1 and the flare light L2 travel. The effect | action which regulates can be heightened.

  In the present embodiment and the fourth embodiment, the light shielding grooves 37 and 43 may be provided in a plane that obliquely intersects with the arrangement direction of the LEDs 32.

  A sixth embodiment of the present invention will be described with reference to FIGS. The basic structure of the present embodiment is the same as that of the first embodiment, and the difference between the present embodiment and the first embodiment is the structure of the lighting device 46. The illuminating device 46 of the present embodiment is formed by a plurality of point light sources such as the LED 32, the light collector 33, the reflecting plate 34, the light shielding plate 35, etc., like the illuminating device 18 of the first embodiment. The light collecting body 33 is provided with a plurality of light blocking members 47 that are restricting portions. These light shielding members 47 are arranged at the same pitch as the pitch of the LEDs 32 along the arrangement direction of the LEDs 32 (longitudinal direction of the light collecting body 33), and one light shielding member 47 is positioned between two adjacent LEDs 32. Is positioned to do. The light shielding member 47 is a member that is formed of the same material as that of the light collector 33 or another material having an approximate linear expansion coefficient and has a light shielding property. In order to have light-shielding properties, coloring is effective.

  When the light shielding member 47 is provided on the light collector 33, a two-color molding method can be used. This two-color molding is a method in which the light collector 33 and the light shielding member 47 are continuously molded using three molds 48, 49, and 50. First, as shown in FIG. 11A, the resin that becomes the light collector 33 is filled from the nozzle portion 49 a into the inside where the two molds 48 and 49 are joined, and the light collector 33 is molded. One mold 49 used at this time is provided with a convex portion 52 for molding the concave portion 51 for molding the light shielding member 47. After shaping the light collector 33 having the recess 51, one of the molds 49 is removed (FIG. 11B), and a new mold 50 is mounted at the position where the mold 49 is removed (FIG. 11C). )). The mold 50 is provided with a plurality of nozzle parts 53 for filling the recesses 51 with resin. By filling the recesses 51 with resin injected from the nozzle parts 53, a plurality of light shielding members 47 are provided. Can be formed as a single body.

  The light shielding member 47 may be formed in a plane orthogonal to the arrangement direction of the LEDs 32, or as described in the second embodiment, a plane that obliquely intersects the arrangement direction of the LEDs 32. You may form in.

  In such a configuration, most of the reflected light L1 (see FIG. 4) reflected by the document D hits the light shielding member 47 after entering the light collector 33, and the reflected light L1 impinging on the light shielding member 47 is diffused. And its progress is regulated. As a result, the reflected light L1 reflected from the document D is restricted from being re-reflected in the condenser 33 to become flare light that illuminates the document D, and the flare light is greatly reduced. For this reason, fluctuations in the amount of illumination light on the document D due to the influence of flare light are suppressed, and even when the document D is whitish, a large amount of flare light does not occur. Therefore, the reading accuracy of the document D is improved without being affected by flare light regardless of whether the arrangement direction of the LEDs 32 in the document D (main scanning direction of image reading) is whitish or blackish, and the image according to a highly accurate reading result is improved. By forming an image in the forming unit 3, the quality of the image formed on the recording medium S is improved.

  A seventh embodiment of the present invention will be described with reference to FIG. The basic structure of the illuminating device 54 of this embodiment is the same as that of the illuminating device 46 of the sixth embodiment, and the light collector 33 is provided with a plurality of light shielding members 55 that are restricting portions. These light shielding members 55 are arranged at the same pitch as the pitch of the LEDs 32 along the arrangement direction of the LEDs 32 (longitudinal direction of the light collecting body 33), and one light shielding member 55 is positioned between two adjacent LEDs 32. Is positioned to do. The light shielding member 55 is a member that is formed of the same material as the light collector 33 or another material having a similar linear expansion coefficient and has a light shielding property. In order to have light-shielding properties, coloring is effective. The light-shielding member 55 of the present embodiment is different from the light-shielding member 47 of the sixth embodiment in that a part of the light-shielding member 55 protrudes from the light collecting body 33 toward the document D side.

  In such a configuration, since a part of the light shielding member 55 protrudes from the light collecting body 33 toward the original D, the light shielding member 55 restricts the travel of the reflected light L1 (see FIG. 4) reflected by the original D. Can be performed more effectively. As a result, the reflected light L1 reflected from the document D is re-reflected in the condenser 33 to be more effectively regulated to become flare light that illuminates the document D, and the flare light is greatly reduced. .

  An eighth embodiment of the present invention will be described with reference to FIG. In the illuminating device 56 of the present embodiment, the light collector 57 is formed by assembling a plurality of light collector pieces 57a into a cylindrical member (not shown), and light shielding properties are provided between the light collector pieces 57a. A light shielding member 58, which is a sheet-shaped restricting portion having a gap, is interposed. The illumination device 56 according to the present embodiment is formed by the light collecting body 57 formed by assembling the light collecting body pieces 57a, the plurality of LEDs 32, the reflecting plate 34, the light shielding plate 35, and the like described in each of the above-described embodiments. ing. The surface in the direction along the arrangement direction of the LEDs 32 in each light collecting body piece 57a is formed so as to be located in a plane orthogonal to the arrangement direction of the LEDs 32, but has been described in the second embodiment. Thus, you may form so that it may be located in the plane which cross | intersects diagonally with respect to the sequence direction of LED32.

  In this configuration, in the present embodiment, most of the reflected light L1 reflected from the document D (see FIG. 4) strikes the light shielding member 58 after entering the light collector 57 and hits the light shielding member 58. The reflected light L1 is diffused and its progress is restricted. As a result, the reflected light L1 reflected from the document D is restricted from being reflected again in the light collecting body 57 to become flare light that illuminates the document D, and the flare light is greatly reduced. Further, when the reflected light L1 reflected by the document D is re-reflected in the condenser 57 and becomes flare light L2 toward the document D (see FIG. 7), most of the flare light L2 is a light shielding member 58. In this case, the flare light L2 impinging on the light shielding member 58 is diffused and its progress is restricted. As a result, the flare light L2 that illuminates the document D is further reduced. For this reason, fluctuations in the amount of illumination light on the document D due to the influence of the flare light L2 are suppressed, and even when the document D is whitish, a large amount of flare light does not occur. Therefore, the reading accuracy of the document D is improved without being affected by flare light regardless of whether the arrangement direction of the LEDs 32 in the document D (main scanning direction of image reading) is whitish or blackish, and the image according to a highly accurate reading result is improved. By forming an image in the forming unit 3, the quality of the image formed on the recording medium S is improved.

  In the present embodiment, the surface of the light collector 57 facing the document D and the end of the light shielding member 58 facing the document D are formed to coincide with each other. However, as described in the seventh embodiment. As described above, a part of the light shielding member 58 may protrude from the light collecting body 57 toward the original D. In this case, it is possible to more effectively regulate the travel of the reflected light L1 reflected by the document D.

  A ninth embodiment of the present invention will be described with reference to FIG. The basic structure of the illuminating device 59 of the present embodiment is the same as that of the illuminating device 56 of the eighth embodiment, and condensing light by assembling a plurality of concentrator pieces 60a in a cylindrical member (not shown). A body 60 is formed, and a roughened surface portion 61 that is a restricting portion is formed on an end surface in a direction along the arrangement direction of the LEDs 32 in each light collecting body piece 60a. The roughened surface portion 61 is formed by a roughening process such as sandblasting or etching. Further, the roughened surface portion 61 is formed so as to be located in a plane orthogonal to the arrangement direction of the LEDs 32, but as described in the second embodiment, the roughened surface portion 61 is arranged with respect to the arrangement direction of the LEDs 32. You may form so that it may be located in the plane which cross | intersects diagonally.

  In such a configuration, in the present embodiment, most of the reflected light L1 (see FIG. 4) reflected by the document D hits the roughened surface portion 61 after entering the light collector 60, and the roughened surface portion 61. The reflected light L1 impinging on is diffused and its progress is regulated. As a result, the reflected light L1 reflected from the document D is restricted from being re-reflected in the condenser 60 to become flare light that illuminates the document D, and the flare light is greatly reduced. Further, when the reflected light L1 reflected by the document D is re-reflected in the condenser 60 and becomes flare light L2 toward the document D (see FIG. 7), most of the flare light L2 is roughened. 61, the flare light L2 that hits the roughened surface portion 61 is diffused and its progress is restricted. As a result, the flare light L2 that illuminates the document D is further reduced. For this reason, fluctuations in the amount of illumination light on the document D due to the influence of the flare light L2 are suppressed, and even when the document D is whitish, a large amount of flare light does not occur. Therefore, the reading accuracy of the document D is improved without being affected by flare light regardless of whether the arrangement direction of the LEDs 32 in the document D (main scanning direction of image reading) is whitish or blackish, and the image according to a highly accurate reading result is improved. By forming an image in the forming unit 3, the quality of the image formed on the recording medium S is improved.

  A tenth embodiment of the present invention will be described with reference to FIG. The basic structure of the illuminating device 62 of the present embodiment is the same as that of the illuminating device 59 of the ninth embodiment, and condensing light by assembling a plurality of concentrator pieces 63a in a cylindrical member (not shown). A body 63 is formed, and a light-absorbing coating surface portion 64 that is a restricting portion is formed on the end surface of each light collecting body piece 63a in the direction along the arrangement direction of the LEDs 32. The light absorbing coating surface portion 64 is formed by coating light absorbing ink or the like. In addition, the light-absorbing coating surface portion 64 is formed so as to be positioned in a plane orthogonal to the arrangement direction of the LEDs 32. However, as described in the second embodiment, in the arrangement direction of the LEDs 32, Alternatively, it may be formed so as to be located in a plane that intersects obliquely.

  In such a configuration, in the present embodiment, most of the reflected light L1 reflected from the document D (see FIG. 4) strikes the light-absorbing coating surface 64 after entering the light collector 63 and absorbs the light. The reflected light L1 that hits the paint surface 64 is diffused and its progress is restricted. As a result, the reflected light L1 reflected by the document D is restricted from being re-reflected in the condenser 63 to become flare light for illuminating the document D, and the flare light is greatly reduced. Further, when the reflected light L1 reflected by the document D is re-reflected in the condenser 63 and becomes flare light L2 toward the document D (see FIG. 7), most of the flare light L2 is for light absorption. The flare light L2 that hits the coating surface portion 64 and hits the coating surface portion 64 for light absorption is diffused and its progress is restricted. As a result, the flare light L2 that illuminates the document D is further reduced. For this reason, fluctuations in the amount of illumination light on the document D due to the influence of the flare light L2 are suppressed, and even when the document D is whitish, a large amount of flare light does not occur. Therefore, the reading accuracy of the document D is improved without being affected by flare light regardless of whether the arrangement direction of the LEDs 32 in the document D (main scanning direction of image reading) is whitish or blackish, and the image according to a highly accurate reading result is improved. By forming an image in the forming unit 3, the quality of the image formed on the recording medium S is improved.

  An eleventh embodiment of the present invention will be described with reference to FIGS. The illuminating device 65 of the present embodiment is formed by a plurality of point light sources such as LEDs 32, a light collector 66, a rib structure 68 that is a restricting portion having a plurality of ribs 67, a reflecting plate 34, a light shielding plate 35, and the like. Yes.

  The light collector 66 is made of transparent resin (acrylic, polycarbonate, etc.) or glass, and is disposed in front of the light emitting direction emitted from the LED 32 toward the document D, and is diffused and emitted from the LED 32. It is formed in a shape that condenses the emitted light toward a direction (sub-scanning direction in image reading) orthogonal to the arrangement direction of LEDs 32 (main scanning direction in image reading). Further, the light collector 66 is fixed directly or indirectly to the substrate 36 so as to be fixed in position with respect to the LED 32.

  The rib structure 68 is disposed between the light collector 66 and the contact glass 12 (see FIG. 2), and is directly or indirectly fixed to the substrate 36. The ribs 67 are arranged at the same pitch as the pitch of the LEDs 32 along the arrangement direction of the LEDs 32 (longitudinal direction of the light collector 66), and one rib 67 is arranged between two adjacent LEDs 32. Further, these ribs 67 are provided so as to be located in a plane orthogonal to the arrangement direction of the LEDs 32.

  In such a configuration, most of the reflected light L1 reflected toward the light collector 65 side by the document D hits the rib 67 of the rib structure 68 and hits the rib 67 before entering the light collector 65. The reflected light L1 is diffused and its progress is restricted. As a result, the reflected light L1 reflected by the document D is restricted from being re-reflected in the condenser 66 to become flare light that illuminates the document D, and the flare light is greatly reduced. For this reason, fluctuations in the amount of illumination light on the document D due to the influence of flare light are suppressed, and even when the document D is whitish, a large amount of flare light does not occur. Therefore, the reading accuracy of the document D is improved without being affected by flare light regardless of whether the arrangement direction of the LEDs 32 in the document D (main scanning direction of image reading) is whitish or blackish, and the image according to a highly accurate reading result is improved. By forming an image in the forming unit 3, the quality of the image formed on the recording medium S is improved.

  In the present embodiment, the rib 67 is provided so as to be located in a plane orthogonal to the arrangement direction of the LEDs 32. As described in the second embodiment, the rib 67 is provided as follows. You may provide it in the surface which cross | intersects diagonally with respect to the arrangement direction of LED32. Further, the rib structure 68 may be formed integrally with the light collector 66. When the rib 67 is provided in a plane that obliquely intersects with the arrangement direction of the LEDs 32, the shadow of the rib 67 that is projected on the document D by the illumination from a certain LED 32 is adjacent to the position. Thus, the illumination light from the other LEDs 32 cancels out, and the shadow of the rib 67 that is copied onto the document D by the illumination from the two adjacent LEDs 32 does not overlap on the document D. As a result, the shadow of the rib 67 on the document D becomes thin, and the light amount ripple in the direction along the arrangement direction of the LEDs 32 on the document D caused by the shadow of the rib 67 is reduced. When the light collector 66 and the rib structure 68 are integrated, the rib structure 68 and the light collector 66 (more precisely, the LED 32 integrated with the light collector 66) at the time of assembly are used. Positioning is not required, and handling and assembly are improved.

  In each of the embodiments described above, only the case where the LEDs 32 are arranged in one row along the main scanning direction has been described. However, the present invention can also be applied to the case where the LEDs 32 are arranged in two or more rows along the main scanning direction. it can. In addition, the array of the LEDs 32 arranged in two or more rows can accept various arrangement shapes, for example, a staggered arrangement.

  Further, the relationship between the light shielding grooves 37 and 41 or the light shielding member 47 and the LED 32 as the regulating portion has been described in the case where the regulating portion is located between two adjacent LEDs 32. However, the flare light that illuminates the document D is used. One restricting portion may be positioned for each of the plurality of LEDs 32 along the arrangement direction of the LEDs 32 as long as the light can be effectively shielded. By reducing the number of restricting portions, there is an advantage that the amount of light shielded by the restricting portions is reduced and the illuminance can be increased.

1 is a schematic front view showing an internal structure of a copying machine according to a first embodiment of the present invention. It is a front view which shows the illuminating device and 1st mirror mounted in the 1st traveling body. It is a disassembled perspective view which shows an illuminating device. It is a side view which shows a mode that the advance of reflected light is controlled. It is a disassembled perspective view which shows the illuminating device of the 2nd Embodiment of this invention. FIG. It is a side view which shows a mode that advancing of the flare light in the 3rd Embodiment of this invention is controlled. It is a side view which shows a part of illuminating device of the 4th Embodiment of this invention. It is a side view which shows a part of illuminating device of the 5th Embodiment of this invention. It is a disassembled perspective view which shows the illuminating device of the 6th Embodiment of this invention. It is a process figure at the time of shape | molding a condensing body by the two-color molding method. It is a disassembled perspective view which shows the illuminating device of the 7th Embodiment of this invention. It is a disassembled perspective view which shows the illuminating device of the 8th Embodiment of this invention. It is a side view which shows a part of illuminating device of the 9th Embodiment of this invention. It is a side view which shows a part of illuminating device of the 10th Embodiment of this invention. It is a disassembled perspective view which shows the illuminating device of the 11th Embodiment of this invention. It is a side view which shows a mode that the advance of reflected light is controlled. 4A and 4B are explanatory diagrams for explaining fluctuations in the amount of illumination light with respect to a document due to the influence of flare light when the entire main scanning direction of the document is white, in which FIG. 4A and 4B are explanatory diagrams for explaining fluctuations in the amount of illumination light with respect to a document due to the influence of flare light when the main scanning direction of the document is a mixture of white and black, where (a) is a side view and (b) is a bottom view. is there.

Explanation of symbols

3 Image forming unit 13 Image reading device 17 Photoelectric conversion element 18 Illumination device 32 Point light source 33 Condensing body 37 Restriction part, light shielding groove 40 Illumination device 41 Restriction part, light shielding groove 42 Illumination device 43 Restriction part, light shielding groove 44 Illuminating device 45 Illuminating device 46 Illuminating device 47 Restricting portion, light shielding member 54 Illuminating device 55 Restricting portion, light shielding member 56 Illuminating device 57 Condensing body 58 Restricting portion, light shielding member 59 Illuminating device 60 Condensing body 61 Restricting portion, roughened surface portion 62 Illuminating device 63 Condensing body 64 Restricting portion, light-absorbing coating surface portion 65 Illuminating device 66 Condensing member 67

Claims (11)

A plurality of point light sources that emit light that illuminates the object to be illuminated, arranged linearly;
A light collector arranged in front of the emission direction of the light emitted from the point light source, and condensing the light emitted from the point light source in a line toward the illumination object;
Positioned on the optical path from the point light source side toward the illumination object, and at least one of the reflected light from the illumination object and the flare light toward the illumination object along the arrangement direction of the point light sources And a regulation part that regulates by position,
The restricting unit is configured such that one or both of the surface side of the light collector facing the illumination object and the surface side of the light collector facing the point light source, or both of the point light sources of the light collector. An illuminating device, characterized in that the illuminating device is provided in a plane that obliquely intersects a position along the arrangement direction and the arrangement direction of the point light sources.   The lighting device according to claim 1, wherein the restricting portion is a plurality of light shielding grooves.   The lighting device according to claim 1, wherein the restricting portion is a plurality of light shielding members provided at positions along the arrangement direction of the point light sources in the light collecting body.   The lighting device according to claim 1, wherein the restricting portion is a plurality of light-absorbing coating surface portions provided at positions along the arrangement direction of the point light sources in the light collecting body. The lighting device according to claim 1, wherein the restricting portion is a rib structure having a plurality of ribs provided on a surface side of the light collector that faces the illumination object. A plurality of point light sources that emit light that illuminates the object to be illuminated, arranged linearly;
A light collector arranged in front of the emission direction of the light emitted from the point light source, and condensing the light emitted from the point light source in a line toward the illumination object;
Positioned on the optical path from the point light source side toward the illumination object, and at least one of the reflected light from the illumination object and the flare light toward the illumination object along the arrangement direction of the point light sources And a regulation part that regulates by position,
A plurality of the restricting portions are provided along the arrangement direction of the point light sources respectively on the surface side of the light collector facing the illumination object and on the surface side of the light collector facing the point light source,
An arrangement direction of the point light sources includes the restricting portion provided on the surface of the light collector facing the illumination object and the restricting portion provided on the surface of the light collector facing the point light source. A lighting device, wherein the lighting device is provided in different planes whose positions are shifted along the axis. A plurality of point light sources that emit light that illuminates the object to be illuminated, arranged linearly;
A light collector arranged in front of the emission direction of the light emitted from the point light source, and condensing the light emitted from the point light source in a line toward the illumination object;
Positioned on the optical path from the point light source side toward the illumination object, and at least one of the reflected light from the illumination object and the flare light toward the illumination object along the arrangement direction of the point light sources And a regulation part that regulates by position,
The lighting device according to claim 1, wherein the restricting portion includes a plurality of rough surface portions provided at positions along the arrangement direction of the point light sources in the light collecting body.   The lighting device according to claim 7, wherein the roughened surface portion is provided in a plane orthogonal to the arrangement direction of the point light sources.   The lighting device according to claim 7, wherein the roughened surface portion is provided in a plane that obliquely intersects with the arrangement direction of the point light sources. An illumination device according to any one of claims 1 to 9, which illuminates a document that is an illumination object;
An image reading apparatus comprising: a photoelectric conversion element that reads reflected light from a document. An image reading apparatus according to claim 10;
An image forming apparatus comprising: an image forming unit that forms an image on a recording medium in accordance with image data read by the image reading apparatus.

Images