JP2021087197A - Imaging apparatus - Google Patents

Abstract

To provide an imaging apparatus capable of acquiring an image of a subject quickly and easily by using oblique-view type imaging units, as one embodiment according to a disclosed technique.SOLUTION: The imaging apparatus according to a first aspect of the present invention comprises: two oblique-view type imaging units each including an optical system whose image acquisition surface is a focusing surface, and acquiring image data by imaging the subject from an oblique direction; and a table having an installation surface on which a subject is installed. The two oblique-view type imaging units are placed with the image acquisition surface inserted therebetween.SELECTED DRAWING: Figure 4

Description

The present invention relates to an imaging device including a perspective imaging unit.

Patent Document 1 describes an information reading device that optically reads an information recording medium installed on an installation member. In this information reading device, it is described that a shutter that moves between a first light-shielding position and a second light-shielding position is used to switch between shooting from the upper surface and shooting from the lower surface of the information recording medium.

JP-A-2018-26804

One embodiment according to the technique of the present disclosure provides an image pickup apparatus capable of quickly and easily acquiring an image of a subject by using a perspective image pickup unit.

The image pickup apparatus according to the first aspect of the present invention includes an optical system in which the image acquisition surface is a focal surface, and includes two perspective image pickup units that image the subject at an angle to acquire image data, and the subject. An image pickup device including a table having an installation surface to be installed, and the two perspective-type image pickup units are image pickup devices arranged so as to face each other with an image acquisition surface interposed therebetween.

In the first aspect of the imaging apparatus according to the second aspect, the two perspective imaging units are installed outside the imaging range of each other.

In the first or second aspect of the image pickup apparatus according to the third aspect, the two perspective image pickup units are arranged on opposite sides of the image acquisition surface at the same position on the image acquisition surface.

In any one of the first to third aspects of the image pickup apparatus according to the fourth aspect, the two perspective image pickup units are arranged so that the optical axes of the optical system are aligned in the vertical direction, and the image acquisition surface is horizontal. The image acquisition surface is arranged in either the first arrangement state, which is the direction, or the second arrangement state, in which the optical axis is aligned in the horizontal direction and the image acquisition surface is in the vertical direction.

The image pickup apparatus according to the fifth aspect of the present invention includes an optical system in which the image acquisition surface is a focusing surface, and has a perspective image pickup unit that images a subject at an angle to acquire image data and a subject in a facing direction. An image pickup device including a front-facing image pickup unit that acquires image data by imaging from an image and a table having an installation surface on which a subject is placed. The perspective-type image pickup unit and the front-facing image pickup unit are an image acquisition surface. It is an image pickup device arranged so as to face each other.

In the fifth aspect of the image pickup apparatus according to the sixth aspect, the perspective image pickup unit and the face-to-face image pickup unit are arranged so that the optical axis of the perspective image pickup unit and the optical axis of the face-to-face image pickup unit are aligned in the vertical direction. The acquisition surface is arranged in a third arrangement state in the horizontal direction, and the optical axis of the perspective image pickup unit and the optical axis of the facing image pickup unit are arranged in the horizontal direction, and the image acquisition surface is in the fourth arrangement state in the vertical direction. And, it is arranged by either.

The imaging device according to the seventh aspect is any one of the first to sixth aspects, and the optical system of the perspective type imaging unit is the first optical composed of one mirror having positive power in order from the object side. It is an optical system including a system and a second optical system composed of a plurality of lenses and having positive power, and forming an intermediate image between the first optical system and the second optical system.

The image pickup apparatus according to the eighth aspect is a translucent installation table in which the installation surface and the image acquisition surface are present on the same plane in any one of the first to seventh aspects.

In the eighth aspect of the imaging device according to the ninth aspect, the imaging range of the perspective imaging unit is identified and displayed on the installation surface.

In the eighth or ninth aspect of the imaging device according to the tenth aspect, the installation table has legs that define the position and direction of the installation surface.

The image pickup apparatus according to the eleventh aspect includes, in any one of the first to tenth aspects, a moving mechanism for relatively moving the perspective image pickup unit and the subject within the image acquisition plane.

The imaging device according to the twelfth aspect includes a display control unit that displays an image captured by the perspective image pickup unit on the display device in any one of the first to eleventh aspects.

FIG. 1 is a diagram showing a schematic configuration of an image pickup apparatus according to a first embodiment. FIG. 2 is a perspective view showing the arrangement of the perspective camera and the installation stand. FIG. 3 is a diagram showing an optical system of a perspective camera. FIG. 4 is an external perspective view of the image pickup apparatus. FIG. 5 is a diagram showing the arrangement of the perspective camera and the installation stand. FIG. 6 is a diagram showing a state of identification display with respect to the imaging range and the camera installation range. FIG. 7 is a diagram showing an example of arrangement of the legs. FIG. 8 is another view showing the arrangement of the perspective camera and the installation stand. FIG. 9 is still another view showing the arrangement of the perspective camera and the installation stand. FIG. 10 is still another view showing the arrangement of the perspective camera and the installation stand. FIG. 11 is still another view showing the arrangement of the perspective camera and the installation stand. FIG. 12 is still another view showing the arrangement of the perspective camera and the installation stand. FIG. 13 is still another view showing the arrangement of the perspective camera and the installation stand. FIG. 14 is a diagram showing a state in which a subject is inserted into the slit type installation table. FIG. 15 is another view showing how the subject is inserted into the slit type installation table. FIG. 16 is a diagram showing the relative movement of the camera and the subject. FIG. 17 is a diagram showing an image pickup apparatus according to a second embodiment. FIG. 18 is another view showing the arrangement of the perspective camera and the installation stand. FIG. 19 is still another view showing the arrangement of the perspective camera and the installation stand. FIG. 20 is still another view showing the arrangement of the perspective camera and the installation stand. FIG. 21 is still another view showing the arrangement of the perspective camera and the installation stand.

One embodiment of the image pickup apparatus according to the present invention is as follows. In the description, the accompanying drawings will be referred to as necessary.

<First Embodiment>
<Configuration of imaging device>
FIG. 1 is a diagram showing a schematic configuration of an image pickup apparatus according to a first embodiment. The image pickup device 1 (imaging device) according to the first embodiment includes two perspective cameras 10A and 10B (squint type imaging unit), an installation table 20 (unit, installation table), and a controller 30 (display control unit). ) And a monitor 40 (display device). The perspective cameras 10A and 10B include an imaging optical system 11, an image sensor 12, and an image acquisition unit 13, and under the control of the image pickup control unit 32, the subject installed on the installation table 20 is obliquely imaged. To acquire image data. The controller 30 causes the perspective cameras 10A and 10B to image the subject according to the user's operation via the operation unit 36 or without the operation, and the display control unit 34 displays the image indicated by the acquired image data. Display on the monitor 40. It is preferable that the controller 30 simultaneously performs imaging from the front side and the back side of the subject in response to one imaging operation. The controller 30 can cause the perspective cameras 10A and 10B to take an image once or a plurality of times, and can also make a moving image image. It should be noted that "simultaneously" is not limited to completely simultaneous, and deviation of the imaging timing according to the purpose of use of the image and the nature of the subject is allowed. For example, when acquiring a still life image such as a printed matter, the imaging timing may be slightly deviated.

Further, the controller 30 can store the image in the storage unit 38, or read the image from the storage unit 38 and display it on the monitor 40. A general computer, tablet terminal, or the like can be used as the controller 30.

<Strabismus camera configuration>
FIG. 2 is a perspective view showing a schematic configuration of the perspective cameras 10A and 10B. The perspective cameras 10A and 10B are stand scanner type devices that capture images of a subject placed within the imaging range 22 from diagonally (obliquely upward and diagonally downward), respectively, and are an imaging optical system 11 (optical system) and an image sensor. 12 and 12 are housed in the housing 18. The housing 18 has a bottom surface 15, a back surface 16, and an upper surface 17. As will be described later with reference to FIG. 4 and the like, by arranging the perspective cameras 10A and 10B upside down with the image acquisition surface in between, images can be taken from diagonally above and diagonally below the subject. The imaging optical system 11 is composed of a first optical system composed of one mirror 11a having a positive power and a second optical system 11b composed of a plurality of lenses having a positive power in order from the object side. The image pickup device 12 is an element that outputs an image pickup signal corresponding to the subject image formed by the image pickup optical system 11, and is arranged on the image formation surface of the image pickup optical system 11. As the image sensor 12, a CCD (Charge Coupled Device), a CMOS (Complementary Metal Oxide Semiconductor), or the like can be used.

FIG. 3 is a diagram showing an example of the configuration of the imaging optical system 11 of the perspective cameras 10A and 10B. In FIG. 3, the luminous flux A near the optical axis and the luminous flux B having the maximum angle of view are also entered as the luminous flux. Further, in FIG. 3, the mirror 11a side is the object side and the image plane Sim side is the image side along the optical axis L. Further, the intermediate image I and the aperture stop St shown in FIG. 3 do not show the shape but show the position on the optical axis.

The imaging optical system 11 is composed of a first optical system composed of one mirror 11a having a positive power and a second optical system 11b composed of a plurality of lenses having a positive power in order from the object side. An intermediate image I is formed between the mirror 11a constituting the optical system and the second optical system 11b. As an example, the second optical system 11b has a front group GF composed of four lenses L1 to L4, an aperture stop St, and a rear group GR composed of three lenses L5 to L7 in order from the object side. It is composed of and. The rear group GR includes a bonded lens C1 which is composed of a positive lens and a negative lens and has positive power as a whole on the image side most. By forming the intermediate image I in the imaging optical system 11 in this way, it is possible to suppress the expansion of the luminous flux in the imaging optical system 11, so that the imaging optical system 11 can be miniaturized and widened. It becomes advantageous to.

Further, the mirror 11a and the second optical system 11b constituting the first optical system have a common optical axis L and have a rotationally symmetric shape with the optical axis L as the rotation axis. With such a configuration, the design of the imaging optical system 11 becomes easy, and the processability and assembling property of the optical elements constituting the imaging optical system 11 are also improved. As a result, it is advantageous in improving the performance while suppressing the cost of the imaging optical system 11. Further, the perspective cameras 10A and 10B can be installed on the same surface (object surface Obj) as the installation table 20 by providing the mirror 11a.

In the present disclosure, the shapes of the first optical system (mirror 11a) and the second optical system 11b are formed by partially cutting a region not used for imaging from a rotationally symmetric shape with the optical axis L as the rotation axis. Is also included in the "rotationally symmetric shape with the optical axis L as the rotation axis".

Further, the mirror 11a constituting the first optical system has an aspherical shape. As described above, by forming the mirror 11a having the largest effective diameter, which is arranged on the object side of the imaging optical system, into an aspherical shape, it is advantageous for correcting curvature of field, coma, astigmatism, and distortion. It becomes.

Further, the lens L1 which is the lens on the most object side of the second optical system 11b is a positive lens having a concave surface facing the object side. By making the object side of the lens L1 concave in this way, the angle of view can be widened while suppressing the diameter of the lens L1. Further, by using the lens L1 as a positive lens, the luminous flux incident from the mirror 11a converges and is emitted, so that the diameter of the next lens L2 can be reduced, and the total length of the second optical system 11b can be shortened. It leads to the conversion. Therefore, it is advantageous for miniaturization of the imaging optical system 11.

As described above, the imaging optical system 11 according to the first embodiment can be a compact and wide-angle imaging optical system. Therefore, the perspective cameras 10A and 10B provided with the imaging optical system 11 can also be a compact device capable of reading a wide range of images.

Further, the perspective cameras 10A and 10B can be configured so that the image capturing range 22 does not include the optical axis L (that is, as a perspective camera) by using the mirror 11a, and is a stand scanner type device. Is suitable as.

<Arrangement of perspective camera and installation stand>
FIG. 4 is a perspective view showing the arrangement of the perspective cameras 10A and 10B and the installation base 20. As shown in FIG. 4, the perspective cameras 10A and 10B are on opposite sides (vertically upward (+ Z direction) and vertically downward (-Z direction)) with the installation surface 21 (installation surface, image acquisition surface) of the installation base 20 in between. ) Are located relative to each other at the same position (the position in the XY plane (in the horizontal plane) is the same). The perspective cameras 10A and 10B are arranged in opposite directions, that is, the perspective cameras 10A and 10B are arranged so that the bottom surfaces 15 (see FIG. 2) of the housing 18 face each other. The image acquisition surface is the focal surface of the perspective cameras 10A and 10B (imaging optical system 11).

The installation table 20 is a transparent installation table having an installation surface 21 on which the subject is installed, and the installation surface 21 and the image acquisition surface (focusing surface) exist on the same plane (object surface Obj in FIG. 3). One squint camera (squint camera 10A) captures the subject installed on the installation surface 21 from the front side (obliquely above), and the other squint camera (squint camera 10B) captures the subject from the back side (diagonally below). Take an image. The imaging range of the perspective cameras 10A and 10B is the imaging range 22. Considering the influence of the perspective cameras 10A and 10B on focusing, the installation base 20 is preferably thin. Specifically, it is preferable that the thickness of the installation table 20 is within the range of the depth of field of the perspective cameras 10A and 10B. Further, the term "transparent" of the installation table 20 includes not only the case where it is completely transparent but also the case where it has a translucent form and has opacity according to the purpose of use of the image and the type of the subject. Further, in the installation table 20, only the imaging range 22 may be transparent, or a part of the area may be open.

According to the configuration shown in FIG. 4, since the perspective cameras 10A and 10B are installed outside the imaging range of each other, the other camera does not appear in the image captured by one camera. Further, since the installation table 20 is transparent, the subject can be imaged from the front side and the back side at the same time, and there is no need to turn over the subject and image the opposite side. Furthermore, since the image acquisition surfaces of the perspective cameras 10A and 10B are focal surfaces, it is possible to acquire an image in a facing state even if the image is taken from a perspective (a rectangular subject appears in a rectangle instead of a trapezoid). There is no need to make adjustments such as. Therefore, the user can quickly and easily image the subject simply by placing the subject on the installation table 20. In FIG. 4, the shapes of the perspective cameras 10A and 10B are simplified and displayed as square pillars (the same applies to the following figures). Further, in FIG. 4, an auxiliary line (a line from the perspective cameras 10A and 10B toward the imaging range 22) indicating the imaging range 22 is displayed as a solid line or a dotted line (the same may be displayed in the following figures). ..

FIG. 5 is a side view and a top view of the example shown in FIG. 4, and shows a state in which a flat subject 50 is installed on the installation surface 21. Specifically, the part (a) in FIG. 5 is a side view, and the part (b) in the figure is a top view (since the perspective camera 10B overlaps with the perspective camera 10A, ( b) Invisible in the part). As shown in FIGS. 4 and 5, the perspective cameras 10A and 10B are arranged so that the optical axes L (see FIGS. 2 and 3) are aligned with the vertical direction (± Z direction), and the image acquisition surface is in the horizontal direction. The state is hereinafter referred to as a "first arrangement state".

<Identification display of imaging range, etc.>
FIG. 6 is a diagram showing an example in which the imaging range is identified and displayed on the installation table 20. The part (a) in FIG. 6 is an example of identifying and displaying the rectangle 23A indicating the imaging range 22 (installation table 20A), and the portion (b) in the figure identifies the L-shaped figure 23B at the four corners of the imaging range 22. It is a display example (installation stand 20B). Such identification display may be performed on the perspective cameras 10A and 10B. The parts (c) and (d) of FIG. 6 further identify and display the rectangle 24 indicating the place where the perspective cameras 10A and 10B are arranged in the examples shown in the parts (a) and (b) of the same figure, respectively. An example (installation table 20C, 20D) is shown. By identifying and displaying the imaging range and the camera placement location in this way, the user can quickly and easily set the subject and the camera. In addition to or instead of such an identification display, the positions of the perspective cameras 10A and 10B (for example, the range of the rectangle 24) on the installation base 20 are recessed in a shape that matches the bottom surface 15 of the housing 18. You may not. With such a configuration, the user can quickly and easily set the camera.

<Legs of the installation stand>
In the arrangement examples of FIGS. 4 and 5, the installation base 20 and the perspective camera 10A can be supported by the bottom surface 15 of the perspective camera 10B arranged vertically below, but the installation base 20 is provided with legs to provide the perspective camera. It may support 10A, 10B and the pedestal. FIG. 7 shows an example in which the leg portion 25 (leg portion) is provided on the installation table 20. The part (a) in FIG. 7 is an example of arranging the legs 25 when the installation table 20 is arranged in the horizontal direction (first arrangement state), and the part (b) in the figure shows the installation table 20 in the vertical direction. It is an arrangement example of the case where it is arranged in (the second and fourth arrangement states described later; see FIGS. 9, 10, 13, 21). Further, the part (c) in FIG. 7 is an arrangement example that can be applied to any of the first and second arrangement states. In the image pickup apparatus 1 according to the first embodiment, the position and direction of the installation surface 21 can be defined by such a leg portion 25. As the leg portion 25, a leg portion 25 that can be attached to and detached from the installation table 20 may be used, or a foldable leg portion 25 may be used.

According to the image pickup apparatus 1 having the above-described configuration, the user can quickly and easily acquire an image of the subject by using the perspective cameras 10A and 10B (squint image pickup unit).

<Modification example of arrangement (1)>
FIG. 8 is a diagram showing a modified example (No. 1) of the arrangement of the perspective cameras 10A and 10B and the installation base 20. As shown in the portion (a) of FIG. 8, the perspective cameras 10A and 10B are arranged at the same position in the X direction, and are located on opposite sides (+ Z direction and) across the installation surface 21 (image acquisition surface). They are arranged relative to each other (in the −Z direction) (first arrangement state). On the other hand, as shown in the portion (b) of the figure, the perspective cameras 10A and 10B are arranged at different positions in the Y direction.

<Modification example of arrangement (2)>
FIG. 9 is a diagram showing a modified example (No. 2) of the arrangement of the perspective cameras 10A and 10B and the installation base 20. As shown in the portions (a) and (b) of FIG. 9, the perspective cameras 10A and 10B are arranged at the same positions in the Z direction and the Y direction, and are located on opposite sides of the installation surface 21. It is arranged in the + X direction and the −X direction). In this arrangement state, the optical axes (± X direction) of the perspective cameras 10A and 10B are arranged in the horizontal direction, and the image acquisition surface (installation surface 21) is the second arrangement state in the vertical direction. In the modified example (No. 2), as shown in the portion (c) of FIG. 9, the arrangement positions of the perspective cameras 10A and 10B in the Y direction may be shifted. Further, in the second arrangement state, the subject 50 can be attached and held on the installation table 20 by suction or the like, or a slit type installation table (see FIGS. 14 and 15) described later may be used. The perspective cameras 10A and 10B and the installation stand 20 may be attached.

In such a modification (No. 2), the perspective cameras 10A and 10B and the installation base 20 can be supported by the back surface 16 of the housing 18. Further, as shown in the portion (a) and the portion (b) (side view and top view, respectively) of FIG. 10, the legs 25 may support the portion.

<Modification example of arrangement (3)>
FIG. 11 is a diagram showing a modified example (No. 3) of the arrangement of the perspective cameras 10A and 10B and the installation base 20. As shown in the portions (a) and (b) of FIG. 11, the perspective cameras 10A and 10B are arranged at different positions in the X direction, while they are arranged at the same position in the Y direction. .. Further, the perspective cameras 10A and 10B are arranged on opposite sides (+ Z direction and −Z direction) with the installation surface 21 (image acquisition surface) in between (first arrangement state).

<Modification example of arrangement (4)>
FIG. 12 is a diagram showing a modified example (No. 4) of the arrangement of the perspective cameras 10A and 10B and the installation base 20. As shown in the portions (a) and (b) of FIG. 12, the perspective cameras 10A and 10B are arranged at different positions in the X direction and the Y direction. Further, the perspective cameras 10A and 10B are arranged on opposite sides (+ Z direction and −Z direction) with the installation surface 21 (image acquisition surface) in between (first arrangement state).

<Modification example of arrangement (5)>
FIG. 13 is a diagram showing a modified example (No. 5) of the arrangement of the perspective cameras 10A and 10B and the installation base 20. As shown in the portions (a) and (b) of FIG. 13, the perspective cameras 10A and 10B are arranged at different positions in the Z direction. Further, the perspective cameras 10A and 10B are arranged on opposite sides (+ X direction and −X direction) with the installation surface 21 (image acquisition surface) in between (second arrangement state). As shown in the portion (c) of FIG. 10, the perspective cameras 10A and 10B may be arranged at different positions in the Y direction. In the modified example (No. 5), the perspective cameras 10A and 10B and the installation base 20 can be supported by the back surface 16 of the housing 18. Further, it may be supported by the legs 25 as in the example shown in FIG.

Also in the above-described modification, one camera (strabismus camera 10B) captures the subject 50 from the front side (diagonal), and at the same time, the other camera (strabismus camera 10A) captures the subject 50 from the back side (diagonal). can do.

<Modification example of installation stand>
In the image pickup apparatus of the present invention, an installation table having a configuration different from that of the installation table 20 may be used. For example, as shown in FIG. 14, a slit-type installation table 27 having three directions (+ X direction and ± Y direction) open may be used. When such an installation table 27 is in the first arrangement state (when the image acquisition surface is in the horizontal direction; for example, the arrangement shown in FIGS. 4 and 5), the user can easily insert the subject 50 from the open side. be able to. The user is also released when the installation table 27 is in the second arrangement state as shown in FIG. 15 (when the image acquisition surface is in the vertical direction; for example, the arrangement shown in FIGS. 9, 10, 13, and 21). The subject 50 can be easily inserted from the vertical side. When the installation table 27 is in the second arrangement state as shown in FIG. 15, by using such a slit type installation table 27, the subject 50 can be held without suction or sticking. The slit may have a structure in which one direction or two directions are open. Further, the above-mentioned identification display (see FIG. 6) may be provided on such an installation base 27, or legs (see FIG. 7) may be provided.

<Relative movement between the camera and the subject>
The image pickup apparatus of the present invention may include, or instead of, a moving mechanism for relatively moving the two cameras and the subject within the image acquisition plane. FIG. 16 shows an example of an embodiment provided with such a moving mechanism, in which the portion (a) is a case where the subject 52 is moved by sandwiching the subject 52 with a rotating roller 62 (moving mechanism, installation table, support portion). In this aspect, the roller 62 corresponds to the "installation table 27" in the first embodiment, and the surface including the contact portion between the rollers 62 corresponds to the "installation surface 21". On the other hand, the portion (b) of FIG. 16 is a case where the subject 52 installed on the installation table 27A is not moved but the perspective cameras 10A and 10B are moved, and the upper surface of the installation table 27A corresponds to the installation surface 21. The roller 62 and the installation table 27A in FIG. 16 can also be regarded as “an installation table in which the portion other than the contact portion with the subject 52 is open”. As the drive unit 60 (moving mechanism) in the aspect of FIG. 16, a motor or the like (not shown) can be used. Further, the aspect of providing the moving mechanism in this way can be applied, for example, when the subject 52 is a transparent film, sheet, or panel, or when the transparent medicine package is a continuous medicine bandage.

<Second embodiment>
In the first embodiment, the case where the two cameras are both squint cameras (squint cameras 10A and 10B) has been described, but the image pickup apparatus of the present invention includes at least one squint camera. Good. In the second embodiment, a case where one of the two cameras is a facing camera that captures a subject from a facing direction and acquires image data will be described.

FIG. 17 is a diagram showing a configuration of an image pickup apparatus 2 according to a second embodiment. As shown in the portion (a) (side view) of FIG. 17, the image pickup apparatus 2 includes one perspective camera 10A and one face-to-face camera 19 (face-to-face image pickup unit) (controller 30). And the illustration of the monitor 40 is omitted). The facing camera 19 is a camera that captures an image of a subject from the facing direction and acquires image data, and the center of the imaging range coincides with the optical axis of the imaging optical system (Z direction in the figure). The perspective camera 10A and the facing camera 19 are arranged on opposite sides (+ Z direction and −Z direction: third arrangement state) with the installation surface 21 (image acquisition surface) in between, and the image pickup control unit 32 (imaging control). One camera (perspective camera 10A) images the subject 50 from the front side (obliquely above), and the other camera (facing camera 19) images the subject 50 from the back side (vertically below) under the control of the unit). Therefore, in the state shown in FIG. 17, the optical axis of the perspective camera 10A (squint imaging unit) and the optical axis of the facing camera 19 (facing imaging unit) are arranged in the vertical direction, and the image acquisition surface is in the horizontal direction. Is the "third arrangement state". The position and direction of the facing camera 19 may be defined by the surface of the housing of the facing camera 19 on the −Z side, or may be defined by using a member such as an arm (not shown).

Even in the image pickup apparatus 2 having such a configuration, the user can quickly and easily acquire an image of the subject as in the first embodiment. Further, since the upper part of the subject 50 (in the + Z direction in FIG. 17) is large, the subject 50 can be smoothly arranged and removed, and the risk of dust or dirt falling on the subject 50 can be reduced. it can.

<Modification example of arrangement (1)>
FIG. 18 is a diagram showing a modified example (No. 1) of the arrangement of the perspective camera 10A, the facing camera 19, and the installation table 20 in the second embodiment. As shown in the portion (a) of FIG. 18, the perspective camera 10A and the facing camera 19 are arranged at the same positions as in the example of FIG. 17 in the XZ plane (third arrangement state), but in the same figure. As shown in part (b), the perspective camera 10A is arranged in the Y direction at a position different from the example of FIG. Although the perspective camera 10A is arranged in the −Y direction (and the −X direction) in FIG. 18, it may be arranged in the + Y direction or the + X direction.

<Modification example of arrangement (2)>
FIG. 19 is a diagram showing a modified example (No. 2) of the arrangement of the perspective camera 10A, the facing camera 19, and the installation base 20. As shown in the portion (a) of FIG. 19, in the modified example (No. 2), the perspective camera 10A and the facing camera 19 are arranged upside down from the examples of FIGS. 17 and 18. Specifically, as shown in the portion (a) of FIG. 19, the perspective camera 10A is arranged on the −Z side of the installation base 20, and the facing camera 19 is arranged on the + Z side (third arrangement). Status). Further, as shown in the portion (b) of FIG. 19, the perspective camera 10A and the facing camera 19 are arranged at the same position in the Y direction.

<Modification example of arrangement (3)>
FIG. 20 is a diagram showing a modified example (No. 3) of the arrangement of the perspective camera 10A, the facing camera 19, and the installation base 20. As shown in the portion (a) of FIG. 20, the perspective camera 10A and the facing camera 19 are arranged at the same positions as in the example of FIG. 19 in the XZ plane (third arrangement state), but in the same figure. As shown in part (b), the perspective camera 10A is arranged in the Y direction at a position different from the example of FIG. Although the perspective camera 10A is arranged in the −Y direction (and the −X direction) in FIG. 20, it may be arranged in the + Y direction or the + X direction.

<Modification example of arrangement (4)>
FIG. 21 is a diagram showing a modified example (No. 4) of the arrangement of the perspective camera 10A, the facing camera 19, and the installation base 20. As shown in the portions (a) and (b) of FIG. 21, the perspective camera 10A and the facing camera 19 align their optical axes (± X direction) in the horizontal direction and sandwich the installation surface 21. It is arranged on the opposite side (+ X direction and -X direction). This arrangement state is the "fourth arrangement state" in which the image acquisition surface (installation surface 21) is in the vertical direction. As shown in the portion (c) of FIG. 21, the positions of the perspective camera 10A and the facing camera 19 in the Y direction may be shifted.

<Other variants of the second embodiment>
Regarding the first embodiment, the above-described modification of the arrangement, the leg portion, the imaging range, the identification display of the camera arrangement position, the slit type installation table, the moving mechanism, and the like are similarly applied to the imaging device 2 according to the second embodiment. Can be applied.

Although the embodiments and other examples of the present invention have been described above, the present invention is not limited to the above-described aspects, and various modifications can be made without departing from the spirit of the present invention.

1 Imaging device 2 Imaging device 10A Perspective camera 10B Perspective camera 11 Imaging optical system 11a Mirror 11b Second optical system 12 Imaging element 13 Image acquisition unit 15 Bottom surface 16 Back surface 17 Top surface 18 Housing 19 Facing camera 20 Installation stand 20A Installation table 20B Installation table 20C Installation table 20D Installation table 21 Installation surface 22 Imaging range 23A Rectangular 23B Figure 24 Rectangular 25 Legs 27 Installation table 27A Installation table 30 Controller 32 Imaging control unit 34 Display control unit 36 Operation unit 38 Storage unit 40 Monitor 50 Subject 52 Subject 60 Drive unit 62 Roller A Light beam B Light beam C1 Junction lens GF Front group GR Rear group I Intermediate image L Optical axis L1 Lens L2 Lens L5 Lens Obj Object surface Sim Imaging surface St Aperture aperture

Claims (12)

It is equipped with an optical system whose image acquisition surface is a focal surface, and has two perspective type imaging units that acquire image data by imaging the subject at an angle.
A table having an installation surface on which the subject is installed, and
An image pickup device equipped with
The two perspective image pickup units are arranged so as to face each other with the image acquisition surface interposed therebetween.
Imaging device. The imaging device according to claim 1, wherein the two perspective imaging units are installed outside the imaging range of each other. The imaging device according to claim 1 or 2, wherein the two perspective-type imaging units are arranged on opposite sides of the image acquisition surface at the same position on the image acquisition surface. The two perspective image pickup units
The first arrangement state in which the optical axis of the optical system is aligned in the vertical direction and the image acquisition surface is in the horizontal direction,
A second arrangement state in which the optical axis is aligned in the horizontal direction and the image acquisition surface is in the vertical direction,
The imaging apparatus according to any one of claims 1 to 3, which is arranged in any one of the above. A perspective image pickup unit that has an optical system whose image acquisition surface is a focal surface and acquires image data by imaging the subject at an angle.
A front-facing imaging unit that acquires image data by imaging the subject from the front-facing direction,
A table having an installation surface on which the subject is installed, and
An image pickup device equipped with
The perspective type image pickup unit and the face-to-face image pickup unit are arranged so as to face each other with the image acquisition surface interposed therebetween.
Imaging device. The perspective type image pickup unit and the face-to-face image pickup unit
A third arrangement state in which the optical axis of the perspective image pickup unit and the optical axis of the face-to-face image pickup unit are arranged in the vertical direction and the image acquisition surface is in the horizontal direction.
A fourth arrangement state in which the optical axis of the perspective image pickup unit and the optical axis of the face-to-face imaging unit are arranged in the horizontal direction and the image acquisition surface is in the vertical direction.
The imaging apparatus according to claim 5, which is arranged in any of the above. The optical system of the perspective image pickup unit includes a first optical system composed of one mirror having positive power and a second optical system composed of a plurality of lenses having positive power in order from the object side. The imaging device according to any one of claims 1 to 6, which is an optical system that forms an intermediate image between the first optical system and the second optical system. The imaging device according to any one of claims 1 to 7, wherein the table is a translucent installation table in which the installation surface and the image acquisition surface are present on the same plane. The imaging device according to claim 8, wherein the imaging range of the perspective imaging unit is identified and displayed on the installation surface. The imaging device according to claim 8 or 9, wherein the installation table has legs that define the position and direction of the installation surface. The imaging device according to any one of claims 1 to 10, further comprising a moving mechanism for relatively moving the perspective image pickup unit and the subject within the image acquisition surface. The imaging device according to any one of claims 1 to 11, further comprising a display control unit for displaying an image captured by the perspective type imaging unit on a display device.

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