JP2013172353A - Imaging device and mounting board manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device capable of efficiently imaging an object at a high resolution even when the aspect ratio in a region disposed with imaging pixels and the aspect ratio of the region to take an image of the object.SOLUTION: The imaging device takes an image of a first image 201 as an image of a part of an object 40 and a second image 202 of the other part thereof in a state that both are disposed being aligned in a direction crossing a direction where an object region T extends. The imaging device includes: a pixel group 210 constituted of plural imaging pixels disposed being aligned at least in a row direction including a first pixel group 211 and a second pixel group 212 disposed in a column direction crossing the row direction; a lens group for focusing the first image 201 an image of a part of the object on the first pixel group 211 along an imaging optical axis; and a diffraction grating disposed at a position where the first image 201 as a real image passes for diffracting a second image 202 as a virtual image so that a second pixel group 212 takes an image thereof.

Description

  In the present invention, when the aspect ratio of the imaging target area is different from the aspect ratio of the area where imaging pixels for imaging are arranged, the imaging target area is divided into a plurality of images using an optical system. The present invention relates to an imaging device that rearranges images and picks up an image, and a mounting board production device.

  In a production apparatus that produces industrial products, an image obtained from an imaging apparatus may be analyzed for grasping the position of a part, grasping the shape of a part, or inspecting a product produced by the production apparatus. For example, in a component mounting apparatus, which is one of the mounting board production apparatuses, a nozzle that holds a component by suction is used, the component is held in a component supply unit, and the held component is imaged by an imaging device to shape the component. A component is mounted on a substrate based on the measured and acquired component information.

  For recent component mounting equipment, it is desirable to be able to produce mounting boards with high production efficiency by improving the mounting speed, while on the other hand, it is possible to accurately mount components and suppress the occurrence of defective mounting boards, yield. It is desirable to improve. Accordingly, it is required to mount the component at high speed and accurately by imaging the component with high resolution and high speed.

  However, the aspect ratio of the imaging surface (field of view) of the part that is the imaging object is diverse, but the aspect ratio of an image sensor such as a CCD or CMOS used for imaging is fixed in principle. In order to image widely throughout, it is necessary to reduce the magnification of the lens system and image the entire part at once, or to relatively increase the magnification of the lens system and divide the imaging object into multiple locations. . Thus, when imaging an imaging target object at once, it is necessary to sacrifice the resolution of the image, and it is difficult to obtain high mounting accuracy. On the other hand, when imaging is performed by dividing the imaging target into a plurality of locations, it takes a long time to complete imaging, and it is difficult to produce a mounting board at high speed.

  As one technique for solving the above problems, there is a technique described in Patent Document 1. The technique shifts the image of each component held by a plurality of nozzles arranged on the circumference to the center of the circumference using a prism or the like, and changes the aspect ratio of the area where the components are apparently arranged. Thus, it is possible to image a plurality of parts at a time without using an expensive camera with high resolution and wide field of view.

JP 2009-272325 A

  However, in order to change the aspect ratio, an imaging apparatus that divides and rearranges images using a combination of prisms and mirrors, etc. may have a large optical system and may be difficult to incorporate in a production apparatus. . In addition, when a combination of prisms and mirrors is used, the weight increases, and it may be difficult to move the imaging device to scan the object.

  The invention of the present application has been made in view of the above-described problems, and has a relatively simple structure and is relatively light, but the image corresponding to the imaging target region is divided into a plurality of images and rearranged. The purpose of this invention is to provide an imaging device capable of apparently changing the relationship between the aspect ratio of the object to be imaged and the aspect ratio of the image sensor, and a mounting board production apparatus equipped with the imaging device. To do.

  In order to achieve the above object, an imaging apparatus according to the present invention crosses a first image, which is an image of a part of an imaging object, and a second image of another part, with the arrangement direction of the part and the other part. An image pickup apparatus that picks up images in a state of being aligned in a direction, and is a pixel group including a plurality of image pickup pixels arranged at least in a row direction, the first being arranged in a column direction intersecting the row direction A pixel group, a second pixel group, a lens group that forms a first image, which is a partial image of the imaging object, on the first pixel group along the imaging optical axis, and the first image as a real image And a diffraction grating that diffracts so that the second pixel group captures the second image as a virtual image.

  According to this, the first image which is an image of a part of the imaging object and the second image of the other part are rearranged by a diffraction grating into a state in which the first image and the other part are arranged in a direction intersecting the arrangement direction of the part and the other part. An image can be taken.

  Therefore, it is possible to capture the first image and the second image with the first pixel group and the second pixel group without being restricted by the aspect ratio of the imaging target region including a part of the imaging target object and the other part. It becomes possible. For example, a rectangular imaging means in which imaging pixels are arranged in a matrix like an area image sensor has a first pixel group as a half in the short direction and a second pixel group as the other half, and a long rectangular imaging object. When the half image in the longitudinal direction is the first image and the other half image is the second image, the first image is captured by the first pixel group, and the second image is captured by the second pixel group. Further, it becomes possible to capture an image of a long rectangular imaging object at a time with an imaging means that is completely different from the aspect ratio.

  In addition, since the diffraction grating can be thinned in the direction in which light is transmitted, it can be easily disposed in any part inside or outside the lens system, and the enlargement of the imaging device can be suppressed. Further, the diffraction grating can be made lighter than an optical system combining a prism and a mirror.

  Further, light projecting means for projecting light along a light projection axis that passes from the first pixel group side through at least one lens of the lens group to the imaging object side and intersects the imaging optical axis And reflecting means for reflecting the light emitted from the light projecting means and having passed through the lens group to the portion of the imaging object corresponding to the first image and the second image, the diffraction grating, It may be arranged closer to the first image group than the crossing position of the imaging optical axis and the light projection axis.

  According to this, the imaging device provided with the light projecting means can be made compact, and it is not necessary to separately receive a lens system for light projection, so that the weight can be reduced.

  Further, the light projected by the light projecting means has a uniform brightness along the first direction with respect to the imaging object, and the brightness is periodic according to the position in the second direction intersecting the first direction. Luminance change light, which is light having a luminance distribution that changes to

  According to this, if the imaging object is imaged by a compact and lightweight imaging device based on the luminance change light projected onto the imaging object, the obtained image is analyzed to obtain a pseudo three-dimensional shape of the imaging object. It becomes possible to measure.

  In order to achieve the above object, an imaging apparatus according to the present invention crosses a first image, which is an image of a part of an imaging object, and a second image of another part, with the arrangement direction of the part and the other part. An image pickup apparatus that picks up images in a state of being aligned in a direction in which a pixel group composed of a plurality of image pickup pixels arranged in a straight line and the first image are a part of the pixel group. A lens group that forms an image on one pixel group, and a diffraction grating disposed at a position where the first image passes as a real image, and a second pixel group that is the other part of the pixel group using the second image as a virtual image And a diffraction grating that diffracts so as to capture an image.

  According to this, the first image which is an image of a part of the imaging object and the second image of the other part are rearranged by a diffraction grating into a state in which the first image and the other part are arranged in a direction intersecting the arrangement direction of the part and the other part. An image can be taken.

  Therefore, it is possible to capture the first image and the second image with the first pixel group and the second pixel group without being restricted by the aspect ratio of the imaging target region including a part of the imaging target object and the other part. It becomes possible. For example, a long half of a long and narrow imaging unit in which imaging pixels are arranged on a straight line like a line sensor is a first pixel group, and the other half is a second pixel group. When the half image is the first image and the other half image is the second image, the first image is picked up by the first pixel group, and the second image is picked up by the second pixel group. It is possible to pick up an image of the object at once with an elongated image pickup means that is completely different from the aspect ratio.

In addition, since the diffraction grating can be thinned in the direction in which light is transmitted, it can be easily disposed in any part inside or outside the lens system, and the enlargement of the imaging device can be suppressed. Also,
The diffraction grating can be made lighter than an optical system combining a prism and a mirror.

  According to the present invention, even when the aspect ratio of the region where the imaging pixels are arranged and the aspect ratio of the imaging target are different, it is possible to capture the imaging target with high resolution by eliminating unnecessary portions as much as possible. Can be reduced in size and weight.

FIG. 1 is a perspective view showing an external appearance of a component mounting apparatus. FIG. 2 is a plan view schematically showing the main configuration inside the component mounting apparatus. FIG. 3 is a perspective view schematically showing the structural appearance of the imaging apparatus. FIG. 4 is a side view illustrating a schematic configuration of the imaging apparatus. FIG. 5 is a diagram illustrating a relationship between the lens system, the diffraction grating, and the pixel group of the imaging apparatus and the imaging target region. FIG. 6 is a diagram illustrating a captured image. FIG. 7 is a diagram illustrating a positional relationship between the imaging target region and the diffraction grating 290. FIG. 8 is a perspective view schematically showing the structural appearance of the imaging apparatus. FIG. 9 is a diagram illustrating the relationship between the lens system, the diffraction grating, and the pixel group of the imaging apparatus and the imaging target area.

  Next, embodiments of an imaging apparatus and a mounting board production apparatus according to the present invention will be described with reference to the drawings. The following embodiments are merely examples of an imaging apparatus and a mounting board production apparatus according to the present invention. Accordingly, the scope of the present invention is defined by the wording of the claims with reference to the following embodiments, and is not limited to the following embodiments.

  FIG. 1 is a perspective view showing an external appearance of a component mounting apparatus.

  FIG. 2 is a plan view schematically showing the main configuration inside the component mounting apparatus.

  The component mounting apparatus 20 is an example of a mounting board production apparatus, and is an apparatus that mounts a component 40 on a board 30 as shown in FIG.

  In addition, the component mounting apparatus 20 includes two mounting units for mounting the component 40 on the substrate 30 as shown in FIG. The two mounting units cooperate with each other to perform mounting work on one board 30. The mounting unit includes a head 100, an imaging device 200, a moving unit (not shown), a component supply unit 300, and the like.

  The component supply unit 300 is a component that can hold and sequentially supply a plurality of types of components 40. For example, the component supply unit 300 includes a plurality of component cassettes 310 that can sequentially supply components.

  The head 100 can be moved along a rail extending in the X-axis direction by the moving means, and the rail can be moved along the Y-axis direction. As described above, the head 100 can freely move in the XY plane. The head 100 includes a plurality of nozzles 110, sucks the component 40 supplied from the component cassette 310 with the nozzle 110, conveys the sucked component 40 onto the substrate 30, and transfers the component 40 to the substrate 30. It is the component which mounts.

  In the case of the present embodiment, the imaging apparatus 200 is attached to the component mounting apparatus 20 so as to capture an image of the component 40 held in a suspended shape by the nozzle 110 from below. The component mounting apparatus 20 includes image processing means (not shown) that measures the three-dimensional shape of the component 40 by analyzing the image obtained from the imaging apparatus 200. In addition, the component mounting apparatus 20 can move the head 100 by controlling the moving means so that the component 40 relatively passes above the imaging apparatus 200. As the moving means, for example, a linear motor can be listed.

  FIG. 3 is a perspective view schematically showing the structural appearance of the imaging apparatus.

  FIG. 4 is a side view illustrating a schematic configuration of the imaging apparatus.

  FIG. 5 is a diagram illustrating a relationship between the lens system, the diffraction grating, and the pixel group of the imaging apparatus and the imaging target region.

  FIG. 6 is a diagram illustrating a captured image.

  As shown in these drawings, the imaging apparatus 200 includes a first image 201 that is an image of a part of a component 40 that is an imaging object, a second image 202 of another part, and a third image 203 of another part. An apparatus for imaging an image pickup target area T in a state where the image pickup target area T is arranged in a direction (Y matter direction in the figure) that intersects the arrangement direction (X-axis direction in the figure) of the part and the other part. Pixel group 210, lens group 150, and diffraction grating 290.

  A pixel group 210 such as an area image sensor is a pixel group composed of a plurality of imaging pixels 219 arranged at least in the row direction (Y-axis direction in FIG. 3), and in a column direction intersecting the row direction. A first pixel group 211 and a second pixel group 212 are provided, and a third pixel group 213 is further provided.

  In the present embodiment, the pixel group 210 is, for example, a rectangular image recognition device in which about 3000 image pickup pixels 219 are arranged in a matrix. Specifically, the pixel group 210 is a CMOS (complementary metal-oxide semiconductor) image. Examples thereof include a sensor and a CCD (Charge Coupled Device) image sensor.

  The pixel group 210 is an image sensor that outputs the intensity of light emitted to the imaging pixel 219 as digital data. When CMOS is adopted as the pixel group 210, digital data of only the imaging pixel 219 included in an arbitrary region (for example, the region corresponding to the first pixel group 211) of the imaging pixels 219 arranged in a matrix can be acquired. It will be possible. Furthermore, digital data can be acquired independently for each of a plurality of regions in the pixel group 210 (for example, regions corresponding to the first pixel group 211, the second pixel group 212, and the third pixel group 213).

  The lens group 150 includes a plurality of lenses for forming a first image 201, which is a partial image of the imaging target (component 40), on the first pixel group 211 of the area image sensor along the imaging optical axis A. It consists of a combination.

  In the case of the present embodiment, the lens group 150 is disposed at a position between the area image sensor of the imaging device 200 and the imaging target (component 40) in the Z-axis direction, and as shown in FIG. 153, an intermediate lens group 160, and a second lens 154.

  The first lens 153 is a lens arranged at a position closest to the pixel group (pixel group 210) of the area image sensor in the Z-axis direction among the plurality of lenses included in the lens group 150.

  The first lens 153 is called a condenser lens, for example, and has a function of forming an image of the first image 201 that has passed through the intermediate lens group 160 with a pixel group (pixel group 210).

  The second lens 154 is a lens arranged at a position closest to the imaging object (component 40) in the third direction (Z-axis direction) among the plurality of lenses included in the lens group 150.

  The second lens 154 is called an objective lens, for example, and has a function of guiding the first image 201 to the intermediate lens group 160 in the present embodiment.

  The intermediate lens group 160 includes relay lenses 164a, 164b, 164c, and a diaphragm unit 166. The relay lens 164 a is a lens that guides the first image 201 to the diaphragm unit 166. The diaphragm unit 166 is an optical member that adjusts the brightness and focus of incident light. The light that has passed through the aperture 166 is guided to the first lens 153 by the relay lens 164b and the relay lens 164c.

  The first image 201 passes through the lens group 150 as a real image, but the second image 202 and the third image 203 pass through the diffraction grating 290 as virtual images.

  That is, the lens group 150 cooperates with the diffraction grating 290 so that the first image 201, the second image 202, and the long image capturing target region T (see FIG. 5) of the image capturing target (component 40), and The third image 203 has a function of forming an image on the first pixel group 211, the second pixel group 212, and the third pixel group 213 of the pixel group 210.

  The diffraction grating 290 is a member that is arranged at a position where the first image 201 passes as a real image, and is a member that diffracts so that the second pixel group 212 images the second image 202 as a virtual image. In the case of the present embodiment, the diffraction grating 290 also diffracts so that the third pixel group 213 images the third image 203 as a virtual image.

  The diffraction grating 290 is a transmission type diffraction grating, and is a member in which a large number of grooves 291 (or protrusions) are provided in parallel on the surface of a light-transmitting plate material such as glass or resin (see FIG. 7). . In the case of the present embodiment, as illustrated in FIG. 7, the diffraction grating 290 includes an imaging target region T of the imaging target (component 40) corresponding to the first image 201, the second image 202, and the third image 203. The direction C (the direction perpendicular to the direction in which the grooves (or ridges) extend) in which the grooves (or ridges) of the diffraction grating 290 are arranged is slightly inclined with respect to the direction in which the grooves (X-axis direction) extend. . Specifically, the inclination θ of the direction C with respect to the X-axis direction is about 5 degrees to 10 degrees.

  In the present embodiment, the diffraction grating 290 is arranged between the lens group 150 and the pixel group 210. Thereby, the light projected from the light projecting means 130 (described later) can pass through the lens group 150 and reach the imaging object (component 40) without being obstructed.

  The diffraction grating 290 can be arranged at an arbitrary position, but the diffraction grating 290 can be downsized by arranging it at a position where light is collected by the lens group 150, for example, in the vicinity of the pupil. It becomes possible. As a result, the imaging device 200 can be further reduced in size and weight.

  Furthermore, the imaging apparatus 200 includes a light projecting unit 130 and a reflecting unit 180.

  The light projecting means 130 projects light that passes through at least one lens of the lens group 150 from the pixel group 210 (first pixel group 211) side to the imaging object (component 40) side and intersects the imaging optical axis A. A device that projects light along axis B.

  The reflection unit 180 is a part of the imaging target (component 40) corresponding to the first image 201, the second image 202, and the third image 203, which is emitted from the light projecting unit 130 and passed through the lens group 150. It is a member that reflects on the imaging target region T.

  When the pixel group 210 images the component 40 that is an object to be picked up by the nozzle 110 by the light projecting unit 130 and the reflecting unit 180, the light emitted from the light projecting unit 130 is reflected by the reflecting unit 180, and Z The imaging target region T is irradiated in a state inclined by a predetermined angle with respect to the axis.

  In the case of the present embodiment, as shown in FIG. 4, the light projecting unit 130 has uniform brightness along the first direction (Y-axis direction) in the imaging target region T of the imaging device 200, and the first direction and Luminance change light, which is light having a luminance distribution in which luminance periodically changes according to the position in the intersecting second direction (X-axis direction), is projected. The luminance change light is, for example, a sine wave or a sawtooth wave.

  As described above, by sharing the lens group 150 on the imaging side and the light projecting side, the imaging apparatus 200 can be reduced in size and weight.

  Next, in the component mounting apparatus 20, an overview of the imaging method of the component 40 that is the imaging target and the calculation method of the three-dimensional shape by the imaging apparatus 200 will be described.

  The component mounting apparatus 20 moves the head 100 with respect to the imaging device 200 fixed to the base so that the component 40 moves along the X-axis direction (second direction) by the moving means.

  The light projecting unit 130 projects the luminance change light onto the long imaging target region T of the component 40 via the lens group 150 and the reflecting unit 180.

  The first pixel group 211 of the pixel group 210 of the area image sensor images the first image 201 of the imaging target region T as a real image. Simultaneously with the imaging of the first pixel group 211, the second pixel group 212 and the third pixel group 213 respectively capture the second image 202 and the third image 203 as virtual images.

  As described above, if there is no diffraction grating 290, the magnification of the lens group 150 that allows the pixel group 210 to capture only the first image 201, that is, an environment in which an imaging target can be imaged at a relatively high resolution, By using this, it is possible to efficiently image the imaging target region T that is long in the X-axis direction and has a high aspect ratio with the pixel group 210 having different aspect ratios at a time.

  Next, the component mounting apparatus 20 moves the component 40 having a length 1 / n (n is an integer of 3 or more) of the wavelength of the luminance change light in the X-axis direction (second direction).

  The imaging device 200 captures the first image 201, the second image 202, and the third image 203 of the elongated imaging target region T of the component 40 in the same manner as described above.

  As described above, the component 40 is scanned in the X-axis direction (second direction) using the first pixel group 211, the second pixel group 212, and the third pixel group 213 of the area image sensor of the imaging apparatus 200.

  As described above, three images (first image 201, second image 202, and third image 203), which are images of the entire component 40 (or a part thereof) and are captured with a shift of 1 / n wavelength, are obtained.

  The component mounting apparatus 20 uses these n images and derives a pseudo three-dimensional shape of the component 40 by an image processing means such as a computer by a phase shift method. Note that the image processing means does not handle data as an image, but analyzes it using digital data obtained from each imaging pixel 219. At this time, the analysis is performed in consideration of the real image and the virtual image that have passed through the diffraction grating 290.

  Next, another embodiment of the present invention will be described.

  FIG. 8 is a perspective view schematically showing the structural appearance of the imaging apparatus.

  The imaging apparatus 200 shown in FIG. 1 arranges a first image 201 that is a part of an imaging large area T of a subject to be imaged (component 40) and a second image 202 that is a part of another part in an arrangement direction of the part and the other part ( This is an apparatus that captures an image with the pixel group 210 of the image sensor in a state of being aligned in a direction (Y-axis direction) intersecting the (X-axis direction). The components of the imaging apparatus 200 according to the present embodiment are the same as the components of the above-described embodiment, and will be described using the same reference numerals. However, the pixel group 210, the lens group 150, and the diffraction grating 290 are included. I have.

  In the case of the present embodiment, the lens group 150 and the diffraction grating 290 are the same as those in the above embodiment, and the description thereof will not be repeated.

  In the imaging apparatus 200 in the present embodiment, the relationship between the aspect ratio of the pixel group 210 and the aspect ratio of the imaging target region T is such that the aspect ratio of the pixel group 210 and the aspect ratio of the imaging target region T in the above embodiment are the same. The relationship is reversed. In other words, the pixel group 210 of the image sensor is a pixel group including a plurality of imaging pixels arranged in a straight line, and is a so-called line image sensor or the like, and the imaging target region T is a rectangular region with a low aspect ratio. It is.

  In the present embodiment, as shown in FIG. 9, the lens group 150 connects the first image 201 to a first pixel group 211, which is one of the pixel groups 210 virtually divided in the Y-axis direction. I am letting you image. Further, the diffraction grating 290 is arranged at a position where the first image 201 passes as a real image, and is a long image of a line image sensor (image sensor) having a second image 202 arranged side by side in the X-axis direction as a virtual image. Diffraction is performed so as to form an image on the second pixel group 212 which is the other part of the pixel group 210. Further, in the case of the present embodiment, the diffraction grating 290 diffracts so that the third image 203 arranged side by side in the X-axis direction is imaged on the third pixel group 213 which is the other part of the pixel group 210 as a virtual image. To do.

  Based on the above, it is possible to capture an image of an imaging object having a low aspect ratio with the pixel group 210 such as a long line sensor having a high aspect ratio. Accordingly, it is possible to image an imaging object with a low aspect ratio at high speed using a line sensor capable of transferring data at high speed.

  In addition, this invention is not limited to the said embodiment. For example, another embodiment realized by arbitrarily combining the components described in this specification and excluding some of the components may be used as an embodiment of the present invention. In addition, the present invention includes modifications obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meaning described in the claims. It is.

  For example, the direction in which the imaging target region T extends (the Y-axis direction) and the direction in which the imaging pixels 219 are arranged completely coincide with each other, but these relationships can be arbitrarily set using a mirror, a prism, etc. The direction in which the region T extends (Y-axis direction) and the direction in which the imaging pixels 219 are arranged do not have to coincide.

  The first pixel group 211 may not be an area image sensor, but may be formed by arranging a plurality of line sensors in a direction intersecting with the direction in which the line sensor extends. The same applies to the second pixel group 212 and the third pixel group 213.

  In FIG. 5, the length in the Y-axis direction of the part 40 that is the imaging target and the length in the Y-axis direction of the imaging target region T are matched, but the present invention is not limited to this. The region T may be all or a part of the imaging target.

  Further, the light projected by the light projecting unit 130 is not limited to the luminance change light, and is not limited to passing through the lens group 150. Further, the relationship between the imaging optical axis A and the projection axis B may intersect, and the intersection includes a twist relationship in a three-dimensional space.

  Further, when a portion other than the imaging target region T is bright, a mask is applied in the vicinity of the imaging optical axis A so that a real image is not formed on the second pixel group 212 or the third pixel group 213, or the diffraction grating 290 is provided. A dichroic mirror that transmits only light of the corresponding wavelength may be provided in the middle of the imaging optical axis A.

  In addition, the imaging object (component 40) may be fixed and the imaging apparatus 200 may be moved, or both the imaging object and the imaging apparatus 200 may be moved simultaneously.

  Further, the reflecting surface of the reflecting means 180 can adopt not only a flat surface but also an arbitrary curved surface such as a concave surface or a convex surface.

  In the present invention, it is necessary to obtain an image of the imaging target area at high speed while maintaining high resolution even when the aspect ratio of the imaging pixel area and the aspect ratio of the imaging target area are different. It can be used for inspection devices.

A Imaging optical axis B Projecting axis C Groove alignment direction T Imaging target region 20 Component mounting device 30 Substrate 40 Component 100 Head 110 Nozzle 130 Projecting means 150 Lens group 153 First lens 154 Second lens 160 Intermediate lens group 166 Aperture Unit 180 Reflecting means 200 Imaging device 201 First image 202 Second image 203 Third image 210 Pixel group 211 First pixel group 212 Second pixel group 213 Third pixel group 219 Imaging pixel 290 Diffraction grating 291 Groove 300 Component supply unit 310 Parts cassette

Claims (5)

An imaging apparatus that images a first image that is an image of a part of an imaging target and a second image of another part in a state in which the first image and the second part are arranged in a direction that intersects with an arrangement direction of the part and the other part,
A pixel group composed of a plurality of imaging pixels arranged at least in the row direction, the first pixel group arranged in the column direction intersecting the row direction, and the second pixel group;
A lens group that forms an image of a part of the imaging object on the first pixel group along the imaging optical axis;
An imaging apparatus comprising: a diffraction grating arranged at a position where the first image passes as a real image, and diffracting so that the second pixel group images the second image as a virtual image. further,
A light projecting means for projecting light along a light projection axis that passes through the at least one lens of the lens group from the first pixel group side to the imaging object side and intersects the imaging optical axis;
Reflecting means for reflecting light emitted from the light projecting means and having passed through the lens group to the first image and a part of the imaging object corresponding to the second image,
The imaging apparatus according to claim 1, wherein the diffraction grating is disposed closer to the first image group than an intersection position of the imaging optical axis and the light projection axis. The light projected by the light projecting means has the same brightness along the first direction with respect to the imaging object, and the brightness periodically changes according to the position in the second direction intersecting the first direction. The imaging device according to claim 2, wherein the imaging device is luminance-changing light that is light having a luminance distribution. An imaging apparatus that images a first image that is an image of a part of an imaging target and a second image of another part in a state in which the first image and the second part are arranged in a direction that intersects with an arrangement direction of the part and the other part,
A pixel group composed of a plurality of imaging pixels arranged side by side on a straight line;
A lens group that forms the first image on a first pixel group that is a part of the pixel group;
A diffraction grating disposed at a position where the first image passes as a real image, the diffraction grating diffracting so that the second image is captured by a second pixel group which is the other part of the pixel group, with the second image as a virtual image. An imaging apparatus provided. A mounting board production apparatus for producing a mounting board on which components are mounted,
The imaging device according to any one of claims 1 to 4,
A mounting board production apparatus comprising: the imaging device; and a moving unit that relatively moves the imaging object.

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