JP2015049131A - Reflection unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflection unit that enables an optimum three-dimensional measurement, and enables an observation of a state of a measured object in a three-dimensional measurement to be performed by having the measured object surrounded with mirror surfaces.SOLUTION: A reflection unit 10 comprises: a reflection part 620 that is arranged in an area at a peripheral angle of view not inclusive of a central part out of an entire angle of view of a photographing lens forming a subject ray flux from a subject onto an image pickup element, and reflects one part of the subject ray flux to guide the one part thereof to the photographing lens. The reflection part 620 has a pass-through area that is provided out of an optical path of a one-time reflection ray flux which is reflected by the reflection part 620 one time and reaches the image pickup element out of the subject ray flux, and causes light to pass through.

Description

  The present invention relates to a reflection unit.

Using a fish-eye lens and a camera that records the image obtained through the fish-eye lens and a mirror cylindrical body with the inner wall surface as a mirror surface, an image reflected on the mirror surface and an image that does not reflect are captured and reflected. Devices that perform three-dimensional measurement from the parallax between an image and a non-reflected image are known.
[Prior art documents]
[Patent Literature]
[Patent Document 1] International Publication WO 2006/075528

  By performing the three-dimensional measurement by surrounding the object to be measured with a mirror surface, it becomes possible to suitably perform the three-dimensional measurement, but it is difficult to observe the state of the object to be measured.

  The reflection unit according to the aspect of the present invention is disposed in a region of the peripheral field angle that does not include the central portion of the entire angle of view of the photographing lens that forms an image of the subject luminous flux from the subject on the imaging device, and reflects a part of the subject luminous flux. A reflecting portion that guides the image to the photographing lens, and the reflecting portion is provided outside the optical path of the one-time reflected light beam that is reflected once by the reflecting portion of the subject light beam and reaches the image sensor, and allows light to pass therethrough. Has a region.

  The summary of the invention does not enumerate all the features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

(A) It is a perspective view of the front of the reflection unit which concerns on this embodiment. (B) It is a back perspective view of a reflection unit. It is AA sectional drawing of the reflection unit in FIG. (A) It is the side view of the reflection unit seen from the Z-axis plus direction. (B) It is the side view of the reflection unit seen from the Z-axis minus direction. The state which attaches a camera unit and a lens unit to a reflection unit is shown. (A) It is sectional drawing of the XZ plane which passes along the optical axis of the camera unit of the state which attached the camera unit and the lens unit to the reflection unit. (B) It is sectional drawing of the YZ plane which passes along the optical axis of the camera unit of the state which attached the camera unit and the lens unit to the reflection unit. (A) It is a figure explaining the position of a to-be-photographed object and a reflection part. (B) It is a figure explaining the state which image | photographs an imaging | photography target object. (C) An image obtained by the image sensor is shown. (A) It is a figure which shows the state in which the camera unit to which the reflection unit was attached image | photographs a to-be-photographed object. (B) An image obtained by the image sensor is shown. (A) It is a figure explaining the other Example in the reflection unit 10. FIG. (B) It is an enlarged view of an alerting | reporting part. (C) An image obtained by the image sensor is shown. It is a figure explaining the other Example in the reflection unit.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1A is a front perspective view of the reflecting unit 10 according to the present embodiment. FIG. 2B is a rear perspective view of the reflection unit 10. In FIG. 1A, as shown at the lower right in the figure, the center axis of the reflection unit 10 is defined as the Z axis plus direction on the front side of the drawing, and the right side of the drawing on the plane orthogonal to the Z axis. The direction is defined as the X-axis plus direction, and the upward direction on the paper is defined as the Y-axis plus direction.

  The reflection unit 10 includes an attachment unit 200 and a mirror surface unit 600. The attachment unit 200 includes an attachment part 230 and a support part 250. The attachment part 230 is attached to the mount of a camera unit as an imaging apparatus from the Z axis minus direction side. Thereby, the reflection unit 10 is attached to the mount of the camera unit. Moreover, the attachment part 230 engages with the lens unit used for the camera unit to which the reflection unit 10 is attached from the Z axis plus direction side, and holds the lens unit.

  The support portion 250 has a box shape and is connected to the outer peripheral surface of the attachment portion 230 at the bottom surface. Thereby, the support part 250 is fixed to the outer peripheral surface of the attachment part 230. Moreover, the support part 250 supports the mirror surface unit 600 inside the side surface. The mirror surface unit 600 has a box shape, and includes a first side surface 601 parallel to the XZ plane and a chamfered portion 603 whose corners are chamfered by a second side surface 602 parallel to the YZ plane. The chamfered portion 603 is chamfered in a triangular pyramid shape with the tip of the mirror surface unit 600 in the minus direction of the Z-axis as a vertex. The observation window 604 is formed on the chamfered portion 603 by, for example, transparent polycarbonate. As will be described in detail later, an observation window 604 serving as a passage region is provided outside the optical path of a one-time reflected light beam that is reflected once by the reflection unit 620 and reaches the image sensor out of the subject light beam, and allows light to pass therethrough. As another source, the observation window 604 is used as a passing portion that allows light to pass between the internal space and the external space of the reflecting portion 620. The user can observe the object to be photographed arranged inside the reflection unit 10 from the outside of the reflection unit 10. Further, the observation window 604 has an index 605. The index 605 is provided for the purpose of the user confirming whether or not the subject is arranged satisfying a predetermined arrangement condition.

  The mirror surface unit 600 has a reflection part 620. The reflection unit 620 includes a set of a first reflection unit 624 and a second reflection unit 626 that face each other in the X-axis direction, and a set of a first reflection unit 625 and a second reflection unit 627 that face each other in the Y-axis direction. The reflection unit 620 reflects a part of the subject light flux and guides it to the lens unit held by the attachment unit 230. A plane mirror can be used as the first reflectors 624 and 625 and the second reflectors 626 and 627. The first reflecting portions 624 and 625 and the second reflecting portions 626 and 627 are not limited to mirrors, and may be members that can reflect a part of the subject luminous flux. Note that no mirror is provided inside the chamfered portion 603.

  FIG. 2 is a cross-sectional view of the reflection unit 10 in FIG. In FIG. 2, the alternate long and short dash line indicates the center line of the reflection unit 10. 3A is a side view of the reflection unit 10 in FIG. 1 as viewed from the positive direction of the Z axis, and FIG. 3B is a side view of the reflection unit 10 in FIG. 1 as viewed from the negative direction of the Z axis. is there. 2 and 3, the same elements as those in FIG.

  The configuration of the reflection unit 10 will be described in more detail with reference to FIGS. 2 and 3A and 3B. The attachment portion 230 includes a first mount portion 232, a second mount portion 234, a camera unit contact 238, and a lens unit contact 240. The first mount portion 232 is provided on the end surface on the plus side of the Z-axis direction of the attachment portion 230, engages with the mount portion of the camera unit, and attaches the reflection unit 10 to the camera unit. The first mount portion 232 is formed with arc ribs 242 and 244 having different angles corresponding to arc-shaped notches provided in the mount portion of the camera unit. In the example shown in FIG. 3A, the central angle of the arc rib 242 provided in the X-axis plus direction is 90 °, and the center angle of the arc rib 244 provided in the Y-axis minus direction is 45 °. is there. The first mount portion 232 has the same shape as the mount portion of the lens unit used in the camera unit to which the reflection unit 10 is attached.

  The second mount portion 234 is provided on the negative side of the Z-axis of the attachment portion 230, engages with the mount portion of the lens unit, and holds the lens unit. The second mount portion 234 has arc-shaped notches 246 and 248 having different angles corresponding to ribs provided on the mount portion of the lens unit. In the example shown in FIG. 3B, the center angle of the arc-shaped notch 246 provided in the Y-axis minus direction is 45 °, and the center angle of the arc-shaped notch 248 provided in the Y-axis plus direction. Is 90 °. The second mount portion 234 has the same shape as the mount portion of the camera unit to which the reflection unit 10 is attached. The second mount unit 234 is an example of a lens holding unit that holds a photographing lens included in the lens unit.

  The camera unit contact 238 is provided on the end surface of the arc rib 242 on the Z axis plus side. The camera unit contact 238 is in contact with the contact provided on the mount portion of the camera unit, and electrically connects the camera unit and the reflection unit 10. The camera unit contact 238 is electrically connected to the lens unit contact 240. The lens unit contact 240 is provided on the second mount portion 234, and contacts the contact provided on the mount portion of the lens unit to electrically connect the reflection unit 10 and the lens unit. Thereby, the camera unit can be electrically connected to the lens unit. The camera unit can communicate control signals and supply power to the lens unit. The camera unit can also perform communication such as a control signal and supply power to the reflection unit 10 using the contact.

  The mirror surface unit 600 further includes three second illumination units 670. One second illuminating unit 670 is provided at each corner of the rectangular tube that is the Z-axis plus direction end of the reflecting unit 620 and where the chamfered portion 603 is not formed. The second illumination unit 670 illuminates the subject when shooting with the camera unit using the reflection unit 10. Thereby, the shortage of light quantity at the time of imaging | photography can be suppressed. An example of the second illumination unit 670 is an LED bulb.

  FIG. 4 shows a state in which the camera unit 80 and the lens unit 90 are attached to the reflection unit 10. The attachment portion 230 of the reflection unit 10 is attached to the camera unit 80. Specifically, the positions or phases of the arc ribs 242 and 244 of the first mount portion 232 are made to coincide with the phase of the arc-shaped notch 84 provided in the mount portion 82, so that the arc ribs 242 and 244 are Z-axis plus. Insert in the direction. While maintaining this state, the arc-shaped ribs 242 and 244 are locked to the arc-shaped rib 86 by rotating the reflection unit 10 counterclockwise. Thereby, the reflection unit 10 is fixed to the camera unit 80 in the Z-axis direction. Further, by rotating the reflection unit 10, a lock mechanism using a lock pin is operated, and the reflection unit 10 is fixed in the rotation direction around the Z axis. Thereby, the reflection unit 10 is attached to the mount portion 82 of the camera unit 80.

  The lens unit 90 is attached to the attachment portion 230 of the reflection unit 10. Specifically, the mount portion provided in the lens unit 90 is attached to the second mount portion 234. The mount portion of the lens unit 90 has an arc rib having the same configuration as the first mount portion 232. Since the mounting of the mount unit of the lens unit 90 and the second mount unit 234 is the same as the mounting of the first mount unit 232 and the mount unit 82 of the camera unit, the mount unit of the lens unit 90 and the second mount unit 234 are mounted. A description of the mounting will be omitted.

  Thus, the reflection unit 10 is mounted on the mount portion 82 of the camera unit 80, and the position with respect to the camera unit 80 and the rotational phase in the Z-axis direction are fixed. Thereby, even if the position of the camera unit 80 is changed, the positional relationship between the camera unit 80 and the reflection unit 10 does not change. For this reason, the user can perform imaging again without readjusting the position of the reflection unit 10 or the like.

  Similarly, the lens unit 90 is mounted on the second mount portion 234 of the reflection unit 10, and the position with respect to the reflection unit 10 and the rotational phase around the Z axis are fixed. Thereby, even if the lens unit 90 is replaced, the positional relationship between the lens unit 90 and the reflection unit 10 does not change. For this reason, the user can perform imaging again without readjusting the position of the reflection unit 10 or the like.

  FIG. 5A is a cross-sectional view of the XZ plane passing through the optical axis of the camera unit with the camera unit 80 and the lens unit 90 mounted on the reflection unit 10. In FIG. 5A, for the purpose of simplifying the drawing, the first reflecting portion 624, the second reflecting portion 626, the photographing lens 92, and the imaging element 88 are extracted and illustrated. FIG. 5B is a cross-sectional view of the YZ plane passing through the optical axis of the camera unit 80 in a state where the camera unit 80 and the lens unit 90 are attached to the reflection unit 10. Similarly, in FIG. 6B, the first reflection unit 625, the second reflection unit 627, the photographing lens 92, and the imaging element 88 are extracted and illustrated.

  The first reflection unit 624 and the second reflection unit 626 are arranged in a region of a peripheral field angle that does not include the center part among all the field angles of the photographing lens 92 of the lens unit 90. In detail, it arrange | positions so that the whole angle of view may be divided into three. In the present embodiment, they are arranged in regions corresponding to approximately 1/3 of the total angle of view. The first reflecting part 624 and the second reflecting part 626 are parallel to each other.

  The partial light beam 100 (the region indicated by the horizontal line in FIG. 5A) of the subject light beam is imaged in the central region of the image sensor 88 without being reflected by the first reflecting part 624 and the second reflecting part 626. The partial light beam 102 (a region indicated by cross hatching in FIG. 5A) is reflected by the first reflecting portion 624 and then forms an image on a region on the minus side in the X-axis direction of the image sensor 88. The partial light beam 102 is imaged on the image sensor 88 as an image having parallax as if it was imaged on another image sensor 87 shifted from the image sensor 88 to the plus side in the X-axis direction. The partial light beam 104 (a region indicated by a vertical line in FIG. 5A) is reflected by the second reflecting portion 626 and then forms an image on a region on the plus side in the X-axis direction of the image sensor 88. The partial light beam 104 is imaged on the image sensor 88 as an image having parallax as if it was imaged on another image sensor 89 shifted from the image sensor 88 to the minus side in the X-axis direction. In this way, it is possible to obtain subject images picked up from two different viewpoints in the X-axis direction.

  As illustrated in FIG. 5B, the first reflection unit 625 and the second reflection unit 627 that face each other in the Y-axis direction are peripheral field angles that do not include the center part of all the field angles of the photographing lens 92 of the lens unit 90. Is located in the area. In detail, it arrange | positions so that the whole angle of view may be divided into three. In the present embodiment, they are arranged in regions corresponding to approximately 1/3 of the total angle of view. The first reflection part 625 and the second reflection part 627 are parallel to each other.

  The same can be said for the set of the first reflecting portion 625 and the second reflecting portion 627 as the set of the first reflecting portion 624 and the second reflecting portion 626. That is, the partial light beam 106 (a region indicated by a horizontal line in FIG. 5B) forms an image in the central region of the image sensor 88 without being reflected by the first reflection unit 625 and the second reflection unit 627. The partial light beam 108 (the region indicated by cross-hatching in FIG. 5B) is reflected by the first reflector 625 and then forms an image on the negative side of the image sensor 88 in the Y-axis direction. The partial light beam 108 is imaged on the image sensor 88 as an image having parallax as if it was imaged on another image sensor 91 shifted from the image sensor 88 to the plus side in the Y-axis direction. The partial light beam 110 (the region indicated by the vertical line in FIG. 5B) is reflected by the second reflecting portion 627 and then forms an image on the region on the plus side of the image sensor 88 in the Y-axis direction. The partial light beam 110 is imaged on the image sensor 88 as an image having parallax as if it was imaged on another image sensor 93 shifted from the image sensor 88 to the minus side in the Y-axis direction. In this way, it is possible to obtain subject images taken from two different viewpoints in the Y-axis direction.

  Further, by reflecting to one of the first reflecting portion 624 and the second reflecting portion 626 facing in the X-axis direction and reflecting to one of the first reflecting portion 625 and the second reflecting portion 627 facing in the Y-axis direction, A subject image picked up from another viewpoint can be obtained. For example, a partial light beam is reflected by the first reflecting unit 624 arranged in the X-axis direction and the first reflecting unit 625 arranged in the Y-axis direction, and then reflected on the image sensor as an image having parallax. Form an image. As a result, the image is formed on the image sensor as an image having parallax as if the image was formed on another image sensor shifted to the upper left side from the image sensor 88. Similarly, the other partial light beams are formed on the image sensor as parallax images as if they were formed on different image sensors shifted to the upper right side, lower left side, and lower right side. . As described above, according to the present embodiment, nine subject images having different viewpoints can be taken as one image.

A point P _{1 in} FIG. 5A is a position where the partial light beam 102 is reflected by the first reflecting portion 624. Similarly, the point P ₂ is a position where the partial light beam 104 is reflected by the second reflecting portion 626. Since the first reflecting portion 624 and the second reflecting portion 626 are arranged to face each other with the same distance from the optical axis, the point P ₁ and the point P ₂ are located on the subject side of the reflecting unit 10 from the subject side Z axis. It is a point that is the same distance B ₁ away in the direction. In partial beams 102, subject positioned at the point A _1, the reflection at the point _{P 1.} Similarly, in the partial light beams 104, the subject positioned at the point _{A 2,} is reflected at point _{P 2.} Therefore, the first reflection part 624 and the second reflection part 626 may be formed at least a distance B from the subject-side tip of the reflection unit 10. When the focal length of the photographic lens 92 is f, the image height is l ₁ , and the distance between the first reflecting unit 624 and the second reflecting unit 626 is A ₁₂ , the point P ₁ from the tip of the reflecting unit 10 on the subject side and The distance B ₁ to the point P ₂ can be expressed as B ₁ = f × A ₁₂ / l ₁ . Since in the above description using the lens unit 90 of a single-focal distance B ₁ represents no change.

Point Q ₁ is a point where the subject luminous flux at point A ₁ in partial luminous flux 102 and the subject luminous flux at point A ₂ in partial luminous flux 104 intersect. The region S ₁ is a triangular region having the end portion A ₁₂ as a base and the point Q ₁ as a vertex. Region _{S 1} is an area in which partial light beams 100, 102 and 104 overlap each other. That is, the region S ₁ is a region that is imaged on the image sensor 88 by any of the partial light beams 100, 102, and 104. If imaging target is placed inside the area S _1, it can acquire an object image located to the left and right of an object image in the center, which will be described later. Combining subject images located on the left and right of the central subject image increases the baseline length, and therefore enables accurate three-dimensional measurement. Here, the distance C ₁ in the Z-axis direction from the tip of the object side to the point to Q ₁ reflecting unit 10 is a measurable range. The measurable range can be represented by C ₁ = B _1/2 .

A point P _{3 in} FIG. 5B is a position where the partial light beam 108 is reflected by the first reflecting portion 625. Similarly, the point P ₄ is a position where the partial light beam 104 is reflected by the second reflecting portion 627. Since the first reflecting portion 625 and the second reflecting portion 627 are arranged to face each other with the same distance from the optical axis, the point P ₃ and the point P ₄ are located on the Z axis from the tip of the reflecting unit 10 on the subject side. in that same distance B ₂ apart in the direction. Distance _{B 1} and the distance _{B 2} are equal. As described above, when the focal length of the photographic lens 92 is f, the image height is l ₂ , and the distance between the first reflection unit 625 and the second reflection unit 627 is A ₃₄ , the object side of the reflection unit 10 is The distance B ₂ from the tip of the point to the point P ₃ and the point P ₄ can be expressed as B ₂ = f × A ₃₄ / l ₂ .

Point Q ₂ is a point where the subject luminous flux at point A ₃ in partial luminous flux 108 and the subject luminous flux at point A ₄ in partial luminous flux 110 intersect. The region S ₂ is a triangular region having the end portion A ₃₄ as a base and the point Q ₂ as a vertex. Region _{S 2} is an area in which partial light beams 106, 108 and 110 overlap each other. That is, the region S ₂ is a region that is imaged on the image sensor 88 by any of the partial light beams 106, 108, and 110. If the picture-taking object is located within the region S _2, it can be acquired subject image located on the left and right of an object image in the center, which will be described later. Here, the distance _{B 1} and the distance _{B 2} are equal. However, the end-to-end A ₃₄ is shorter than the end-to-end A ₁₂ . Therefore, the area of the region _{S 2} is smaller than the area of the region _{S 1.} That is, the measurable ranges are different from each other. Distance _{C 2} in the Z-axis direction from the tip of the object side to the point _{Q 2} of the reflection unit 10 is a measurable range _can be represented by C 2 _{= B} 2/2. Distance _{C 1} and the distance _{C 2} are equal.

In the above description, the measurable range in the planar state is shown. However, in this embodiment, the reflection unit 620 includes two sets of reflection units, that is, a set of the first reflection unit 624 and the second reflection unit 626 and a set of the first reflection unit 625 and the second reflection unit 627. Therefore, the actual measurable range is space. In this case, the measurable range is the inside of a quadrangular pyramid whose opposite sides on the bottom face are A ₁₂ and A ₃₄ and whose apex is Q ₁ (Q ₂ ). The user, viewing because window 604 through observing the shooting target in the X-axis direction, the photographing object point comprises a rectangular area and the area S ₂ whose vertices Q ₁ that it includes a region S ₁ Q ₂ It can be confirmed whether it is placed in a rectangular parallelepiped area with the vertex at. Thereby, the user can confirm easily whether a to-be-photographed object is arrange | positioned inside the square pyramid which can be measured. Incidentally, when the reflection unit 10 is constituted by a pair of reflecting portion of the first reflecting portion 624 and the second reflecting portion 626, measurable region is an internal triangular prism of the area S ₁ and section. Similarly, when the reflection unit 10 is constituted by a pair of reflecting portion of the first reflecting portion 625 and the second reflecting portion 627, measurable region is an internal triangular prism of the area S ₂ a cross-section.

It is also possible to perform three-dimensional measurement by combining a subject image located at either the left or right and a central subject image. In this case, as shown in FIG. 5A, the measurable range is a distance D ₁ that is wider than the distance C ₁ . As an example, a case where a central subject image and a subject image located on the left are combined will be described. Point R ₁ in the figure is a point where the subject light beam at point A ₁ in partial light beam 102 and the subject light beam at point A ₂ in partial light beam 100 intersect. The region T ₁ is a triangular region having the end portion A ₁₂ as a base and the point R ₁ as a vertex. Region _{T 1} is an area in which partial light beams 100 and 102 overlap each other. That is, the region T ₁ is a region that is imaged on the image sensor 88 by the partial light beams 100 and 102. Since the area T ₁ has a wider range than the area S ₁ , a large object to be photographed can be arranged. Even when combining the object image positioned in the center object image and right, measurable range is the distance D _1. Note that in imaging of an object to be photographed using the reflection unit 10, at least an image obtained by imaging a non-reflected light beam and a partial light beam as long as they are in a range overlapping with either the partial light beam 100 and the partial light beam 102 or the partial light beam 104. An image formed by imaging either one of 102 and 104 can be acquired, and three-dimensional measurement can be performed using the image. Therefore, the observation range of the three-dimensional measurement using the reflection unit 10 is a range where the partial light beam 100 and the partial light beam 102 or the partial light beam 104 overlap.

It is also possible to perform three-dimensional measurement by combining a subject image positioned at either the top or bottom and a central subject image. In this case, as shown in FIG. 5 (b), measurable range, the distance D ₂ is broader than the distance C _2. The distance _{D 2} is equal to the distance _{D 1.} As an example, a case where a central subject image and an upper subject image are combined will be described. Point R ₂ in the figure is the point where the subject light beam at point A ₃ in partial light beam 108 and the subject light beam at point A ₄ in partial light beam 106 intersect. The region T ₂ is a triangular region having the end portion A ₃₄ as a base and the point R ₂ as a vertex. Region _{T 2} are an area where the partial beams 106 and 108 overlap each other. That is, the region T ₂ is a region that is imaged on the image sensor 88 by the partial light beams 106 and 108. Since the area T ₂ has a wider range than the area S ₂ , a larger object to be photographed can be arranged. Even when combining the object image positioned below the center of the object image, measurable range is the distance D _2. Note that, when photographing an object to be photographed using the reflection unit 10, an image obtained by forming an image of at least a non-reflected light beam and a partial light beam as long as the partial light beam 106 and the partial light beam 108 or the partial light beam 110 overlap each other. An image formed by imaging either one of 108 and 110 can be acquired, and three-dimensional measurement can be performed using the image. Therefore, the observation range of the three-dimensional measurement using the reflection unit 10 is a range that overlaps the partial light beam 106 and the partial light beam 108 or the partial light beam 110.

  FIG. 6A is a diagram for explaining the positions of the subject, that is, the subject 140 to be photographed and the reflection unit 620. As shown in the figure, a case where a minicar is photographed as the photographing object 140 will be described. The shooting target 140 is shot in a state surrounded by the reflection unit 620. (B) is a figure explaining the state which image | photographs the imaging | photography target object 140. FIG. Inside the tip of the reflection unit 10, a minicar is arranged as the object to be photographed 140.

  FIG. 6C shows an image obtained by the image sensor 88. For the purpose of facilitating understanding, an image obtained by the image sensor 88 when the reflection unit 10 not provided with the chamfered portion 603 is used is shown. Note that the reversal of the image of the photographing object 140 by the photographing lens 92 is corrected by image processing. The center subject image is a subject image acquired without being reflected by the reflection unit 620. Eight subject images located around the central subject image are subject images acquired by being reflected by the reflection unit 620. For this reason, the orientation of the peripheral subject image is different from the orientation of the central subject image.

  Each subject image located on the left and right of the central subject image is a subject image obtained by being reflected by one of the first reflecting unit 624 and the second reflecting unit 626 facing in the X-axis direction. Specifically, the subject image located on the left is a subject image formed by being reflected by the first reflector 624. The subject image located on the right is a subject image formed by being reflected by the second reflector 626. These subject images are reversed left and right with respect to the central subject image. The subject images positioned above and below the central subject image are subject images obtained by being reflected by one of the first reflecting unit 625 and the second reflecting unit 627 facing in the Y-axis direction. Specifically, the subject image positioned above is a subject image formed by being reflected by the first reflector 625. The subject image located below is a subject image formed by being reflected by the second reflection unit 627. As described above, the four subject images positioned in the upper, lower, left, and right directions are subject images formed by a one-time reflected light beam reflected by the reflection unit 620 once. Therefore, these subject images are inverted up and down with respect to the central subject image.

  The subject images located at the upper left, upper right, lower left, and lower right of the central subject image are reflected by one of the first reflecting portion 624 and the second reflecting portion 626 that face in the X-axis direction and the first face that faces in the Y-axis direction. This is a subject image obtained by being reflected by one of the reflection unit 625 and the second reflection unit 627. Specifically, the subject image located in the upper left with respect to the central subject image is a subject image formed by being reflected by the first reflectors 624 and 625. Of the subject image located at the upper left, the right side of the broken line in the figure is the subject image that is reflected by the first reflecting unit 624 and then formed by being reflected by the first reflecting unit 624, and the left side is the first reflecting unit. This is a subject image formed by being reflected by the first reflector 625 after being reflected by 624. Similarly, the subject image located in the lower left with respect to the central subject image is a subject image formed by being reflected by the first reflecting unit 624 and the second reflecting unit 627. Among the subject images located at the lower left, the right side of the broken line is the subject image formed by being reflected by the first reflecting unit 624 after being reflected by the second reflecting unit 627, and the left side is reflected by the first reflecting unit 624. This is a subject image formed after being reflected by the second reflecting portion 627.

  Similarly, the subject image located in the upper right with respect to the central subject image is a subject image formed by being reflected by the first reflecting unit 625 and the second reflecting unit 626. Among the subject images located at the upper right, the right side of the broken line is the subject image formed by being reflected by the first reflecting unit 625 after being reflected by the second reflecting unit 626, and the left side is reflected by the first reflecting unit 625. This is a subject image formed after being reflected by the second reflecting section 626. Similarly, the subject image located at the lower right with respect to the central subject image is a subject image formed by being reflected by the second reflecting portions 626 and 627. Among the subject images located at the upper right, the right side of the broken line is the subject image formed by being reflected by the second reflecting unit 626 after being reflected by the second reflecting unit 626, and the left side is reflected by the second reflecting unit 627. This is a subject image that is later reflected and imaged by the second reflecting section 626.

  As described above, the four subject images located at the upper left, lower left, upper right, and lower right with respect to the central subject image in the image are subject images that are reflected twice by the reflection unit 620 and formed by a twice reflected light beam. It is. Therefore, these subject images are reversed left and right and up and down with respect to the central subject image. By performing various image processing using the above nine subject images, it is possible to perform a three-dimensional measurement of the photographing object.

  In the above description, an example has been shown in which an imaging object is placed at the tip of the reflection unit 10 for imaging. When photographing an object to be photographed farther from the tip of the reflection unit 10, the first reflecting unit 624 and the second reflecting unit 626 are configured to rotate around the Y axis around the tip of the object to be photographed. Also good.

  When the light receiving surface of the image sensor 88 is rectangular, the angle of view of the camera unit 80 differs between the X axis direction and the Y axis direction. Therefore, it is preferable to match the dimensional ratio of the X-axis direction and the Y-axis direction at the tip of the reflecting unit 620 on the subject side to the aspect ratio of the image sensor 88. The aspect ratio of the image sensor used in the interchangeable lens single-lens reflex camera is 3: 2. Therefore, it is preferable that the dimensional ratio between the X-axis direction and the Y-axis direction at the subject-side tip of the reflecting portion 620 in the state where it is mounted on the camera unit 80 is 3: 2. The reflection unit 10 is rotated 90 ° counterclockwise when mounted on the camera unit 80. Accordingly, in the reflecting portion 620 in FIGS. 1 to 4, the ratio of the dimension in the X-axis direction and the dimension in the Y-axis direction at the tip on the subject side is 2: 3. Note that the aspect ratio of the image sensor varies depending on the camera unit. For example, in the case of a compact camera, the aspect ratio of the image sensor is 4: 3, and in the case of a high-vision camera, the aspect ratio of the image sensor is 16: 9. Therefore, in this embodiment, the dimensional ratio between the X-axis direction and the Y-axis direction at the tip of the reflecting unit 620 on the subject side is described according to the aspect ratio of the image sensor in the camera unit to which the reflecting unit 10 is mounted. Yes.

  FIG. 7A is a diagram illustrating a state in which the camera unit 80 to which the reflection unit 10 is attached captures an object to be imaged. Inside the tip of the reflection unit 10, a minicar is arranged as an object to be photographed. The user can confirm the position of the object to be photographed through the observation window 604. The index 605 is a scale provided corresponding to a measurable range. By referring to the index 605, the user can confirm whether or not the object to be photographed is arranged at a predetermined measurable position before photographing.

  Since the observation window 604 is formed of a transparent member, light outside the reflection unit 10 can be guided to the inside of the reflection unit 10. By forming the observation window 604, the number of second illumination units 670 installed may be reduced. Moreover, in the above description, the chamfering part 603 was provided in one place with respect to the reflection unit 10, and the example which the observation window 604 was provided in the chamfering part 603 was shown. However, the chamfered portion 603 may be formed at each of the four corner portions along the Z axis of the reflection unit 10, and the observation window 604 may be formed at each chamfered portion 603. By increasing the number of observation windows 604 installed, outside light can easily enter the inside of the reflection unit 10 through the observation windows 604, so that the second illumination unit 670 can be omitted.

  In the above description, the observation window 604 is formed in a plane along the chamfered portion 603. However, the observation window 604 may be formed in a concave lens shape along the chamfered portion 603. By making the observation window 604 into a concave lens shape, the user can enlarge and observe the inside of the reflection unit 10.

  FIG. 7B shows an image obtained by the image sensor 88. The obtained images are eight subject images having different viewpoints. Since the chamfered portion 603 having the observation window 604 is formed, no image is generated in the upper left area of the center subject image indicated by the oblique lines. That is, the chamfered portion 603 is formed in a region where the reflecting portion reflects the partial light flux of the subject twice and guides it to the photographing lens 92. As another source, the chamfered portion 603 is provided outside the optical path of one-time reflection that is reflected once by the reflection portion of the subject light flux and reaches the image sensor 88. In the present embodiment, the chamfered portion 603 is formed in the area where the subject image located at the upper left of the center subject is obtained, but the chamfer is formed in any area where the subject images located at the upper right, lower right and lower left are obtained. The portion 603 may be formed.

  The subject image located in the upper left, upper right, lower left, and lower right diagonal directions with respect to the central subject image depends on the perpendicularity of the two reflecting portions adjacent to each other at the position formed on the image sensor. Therefore, it is desirable that the two adjacent reflecting portions be arranged orthogonally with high accuracy. In the present embodiment, the arrangement accuracy is eased, and an oblique subject image is not used. That is, three-dimensional measurement is performed using a center subject image, a subject image positioned to the left and right of the center subject image, and a subject image positioned above and below the center subject image and the center subject image.

  When performing three-dimensional measurement using subject images located on the left and right of the center subject image, the measurement accuracy is better than when using the subject image located on the left or right of the center subject image and the center subject image. Become. The camera unit 80 or the reflection unit 10 may include a switching unit that switches between a measurement mode that gives priority to measurement accuracy and a mode that gives priority to the measurement range. By providing the switching unit, the user can select which of the measurement accuracy and the measurement range is to be prioritized for the three-dimensional measurement. In this case, the index 605 may be formed so as to indicate a plurality of measurable ranges.

  In the above description, an example in which the observation window 604 functions as a notification unit has been shown. The notification unit is not limited to a mode in which the user directly recognizes whether or not the photographing object is arranged in a measurable range by checking the photographing object. The notification unit may be configured to notify the user whether or not the imaging target is indirectly arranged under a predetermined condition by confirming an image captured by the user.

  FIG. 8A is a diagram for explaining another embodiment of the reflection unit 10. The camera unit 80 takes an image of an object to be photographed with the reflection unit 10 attached. Inside the tip of the reflection unit 10, a minicar is arranged as an object to be photographed. The reflection unit 10 includes a notification unit 610 in the chamfered portion 603. The notification unit 610 includes a light source 612 as a first illumination unit. In the following embodiments, the description of the same elements as those described in the above embodiments is omitted.

  FIG. 8B is an enlarged view of the notification unit 610. The notification unit 610 includes an opening 611 and a light source 612 as a passage region through which light passes. The opening 611 is a slit-shaped through hole formed in the chamfered portion 603. The opening 611 allows light to pass between the internal space and the external space of the reflection unit 10. The opening 611 is provided at a position corresponding to a measurable range in the Z-axis direction. The light source 612 is provided outside the opening 611. The light source 612 illuminates laser light as reference light toward the opening 611. The opening 611 is formed smaller than the illumination area of the laser beam. Therefore, the laser light that has passed through the opening 611 illuminates the inside of the reflection unit 10 as slit light.

  The slit light illuminates the position in the measurable range in parallel to the XY plane. That is, the slit light is illuminated along a measurable range. When the slit light illuminates the photographing object, the photographing object is disposed outside the measurable range. On the other hand, when the slit light does not illuminate the object to be photographed, the object to be photographed is arranged within a measurable range.

  FIG. 8C shows an image obtained by the image sensor 88. The white line in the figure indicates slit light blocked by the object to be photographed. When the user shoots the photographic object for the purpose of checking whether the photographic object is arranged at a measurable position, the second illumination unit 670 may be turned off to make it easier to check the slit light. Specifically, the notification unit 610 illuminates the slit light inside the reflection unit 10 with the second illumination unit 670 turned off. When the photographing object is arranged outside the measurable range, the user acquires an image in which the slit light is blocked by the photographing object as illustrated. The user can determine whether or not the photographing object is arranged at a measurable position by confirming the photographed image. The confirmation image may be a live view image.

  In the above description, when the slit light illuminates the photographic subject, the user can determine that the photographic subject is arranged outside the measurable range. On the contrary, for example, if the slit light along the Z-axis is illuminated in the minus direction of the Z-axis from the measurable range, the user determines whether the object to be photographed is arranged at a measurable position. be able to. In this case, the user may determine that the photographing object is arranged at a predetermined measurable position when the slit light does not illuminate the photographing object.

  In the above description, it has been confirmed whether or not the object to be photographed is arranged in a measurable range using a cube. In the following embodiments, the notifying unit advances the slit light along the surface of the quadrangular pyramid that is the measurable range described with reference to FIG.

  In the above description, the notification unit 610 is provided so as to generate slit light at a position corresponding to a measurable range. A plurality of notification units may be provided at different positions in the Z-axis direction. In the case where a plurality of notification units are provided, the plurality of notification units may illuminate slit lights of different colors at different positions. For example, when using two alerting | reporting parts, one slit light illuminates the area | region corresponding to the conditions which give priority to measurement accuracy. The other slit light is arranged so as to illuminate a region corresponding to a condition that gives priority to the measurement range. By providing a measurement mode switching unit in the camera unit 80 or the reflection unit 10, any slit light is illuminated toward the object to be imaged. The user may select which of the measurement accuracy and the measurement range is to be prioritized to perform the three-dimensional measurement by operating the measurement mode switching unit. In addition, since each slit light is a different color, the user can easily confirm which slit light is illuminated from the captured image.

  FIG. 9 is a diagram for explaining another embodiment of the reflection unit 10. In the following embodiments, the description of the same elements as those described in the above embodiments is omitted. The reflection unit 10 includes a first notification unit 680 and a second notification unit 690 as notification units on the outside of the first reflection unit 624 and the outside of the second reflection unit 626. The 1st alerting | reporting part 680 contains the 1st opening part 681 as a passage area which lets light pass, and the 1st light source 682 as a 1st illumination part. The 2nd alerting | reporting part 690 contains the 2nd opening 691 as a passage area which lets light pass, and the 2nd light source 692 as a 1st illumination part. The first opening 681 and the second opening 691 are slit-shaped through holes. The first opening 681 and the second opening 691 allow light to pass between the internal space and the external space of the reflection unit 10. The first opening 681 and the second opening 691 are formed so as to be opened and closed by providing a slide mechanism, for example. The laser light that has passed through the first opening 681 is illuminated so as to be oblique to the Z axis as slit light along the partial light beam 102. Similarly, the laser light that has passed through the second opening 691 is illuminated so as to be oblique to the Z axis as slit light along the partial light beam 104.

The slit light illuminated from the first notification unit 680 travels along the hypotenuse A ₁ -P ₁ . Similarly, the slit light illuminated from the second notification unit 690 travels along the hypotenuse A ₂ -P ₂ . In the case of performing three-dimensional measurement using the partial light beam 100, the partial light beam 102, and the partial light beam 104, the measurable region has a base A between the end portions of the first reflecting portion 624 and the second reflecting portion 626, and an apex. It is the inside of the triangular area | region made into Q. The slit light illuminated by the first notification unit 680 and the second notification unit 690 travels along a triangular area with the end-to-end A as the base and the apex as Q, so that the user can measure the object to be photographed. It is possible to determine whether it is arranged at a possible position. Specifically, the first notification unit 680 and the second notification unit 690 illuminate the inside of the reflection unit 10 with the second illumination unit 670 turned off. Then, the user photographs the object to be photographed. When the imaging target is arranged outside a predetermined measurable position, the user acquires an image in which the slit light is blocked by the imaging target. By acquiring the image in which the slit light is blocked, the user can determine that the object to be photographed is disposed outside the measurable position. On the other hand, when the slit light is not blocked by the object to be photographed, the user can determine that the object to be photographed is arranged at a measurable position. When the object to be photographed is arranged in a measurable range, the user photographs the object to be photographed with the first opening 681 and the second opening closed and the second illumination unit 670 turned on. .

  In the above description, an example in which the lens unit 90 of a single focus lens is used has been shown. The region where the reflecting portion is provided in the optical axis direction and the measurable range vary depending on the focal length of the lens. Therefore, when using a zoom lens, the user may use the zoom lens with a predetermined focal length fixed.

  In the above description, an example in which the lens unit 90 of a single focus lens is used has been shown. When the lens unit 90 is a zoom lens, the measurable range changes depending on the focal length. When using a zoom lens, the notification unit may arrange a plurality of light sources with different illumination angles arranged in an array along the Z axis and switch the light sources according to the focal length to illuminate the reference light. Good.

  In the above description, the example which provided the 1st alerting | reporting part 680 and the 2nd alerting | reporting part 690 in the outer side of the 1st reflective part 624 and the 2nd reflective part 626 was shown. Since the reflection unit 10 is surrounded by four reflection parts of the first reflection parts 624 and 625 and the second reflection parts 626 and 627, more specifically, the measurable region has a square of a side A as a bottom surface, The inside of the quadrangular pyramid with the point Q as the apex angle. Therefore, you may provide an alerting | reporting part on the outer side of the 1st reflection parts 624 and 625 and the 2nd reflection parts 626 and 627, respectively. By providing a notification unit outside each reflection unit, the slit light can be illuminated along a measurable range represented by a quadrangular pyramid. The square pyramid formed by the slit light allows the user to determine whether the object to be photographed is arranged in a measurable range.

  In the above description, the slit light is generated using the laser light and the slit-like through hole. The slit light may be generated by spreading the laser light with a cylindrical lens. As yet another method, the slit light may be generated by spreading the laser light by a polygon mirror that rotates at high speed.

  In the above description, the chamfered portion is formed in an area where the reflecting portion reflects the partial light flux of the subject twice and guides it to the photographing lens. As another source, the chamfered portion is formed in a region outside the optical path of the one-time reflected light beam that is reflected once by the reflecting portion of the light beam of the subject and reaches the image sensor. And the alerting | reporting part showed the example provided in a chamfering part. However, the notification unit may be provided in an area where the partial light beam is reflected twice without providing a chamfered part. That is, the notifying portion may be provided in the vicinity of the corner portion sandwiched between the two reflecting portions without forming the chamfered portion.

  In the above description, an example in which three-dimensional measurement is performed using the lens-interchangeable camera unit 80 has been shown. The camera unit to be used may be a lens-integrated camera. In the case of a lens-integrated camera, the reflection unit is preferably mounted and fixed on the outer periphery of the camera body or the lens barrel.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Reflection unit, 80 Camera unit, 82 Mount part, 84 Arc-shaped notch, 86 Arc rib, 87, 88, 89, 91, 93 Image sensor, 90 Lens unit, 92 Shooting lens, 100, 102, 104, 106, 108, 110 Partial luminous flux, 140 Object to be photographed, 200 Mounting unit, 230 Mounting portion, 232 First mounting portion, 234 Second mounting portion, 238 Contact for camera unit, 240 Contact for lens unit, 242 and 244 Arc rib, 246 248 Arc-shaped notch, 250 support portion, 600 mirror surface unit, 601 first side surface, 602 second side surface, 603 chamfered portion, 604 observation window, 605 index, 610 notification portion, 611 opening portion, 612 light source, 620 reflection Part, 624, 625 First reflection part, 626, 62 The second reflection portion, 670 a second illumination unit, 680 first notification unit, 681 first opening, 682 first light source, 690 the second notification unit, 691 second opening, 692 second light source

Claims (11)

A reflection that is arranged in a region of a peripheral angle of view that does not include the central portion of the entire angle of view of the photographing lens that forms an image of the subject luminous flux from the subject onto the image sensor, and reflects a part of the subject luminous flux to the photographing lens. With
The reflection unit is a reflection unit having a passing region that allows light to pass through provided outside the optical path of a one-time reflected light beam that is reflected once by the reflection unit and reaches the imaging element in the subject light beam.   The reflection unit according to claim 1, wherein the reflection unit includes at least one pair of two mirrors facing each other with the optical axis of the photographing lens interposed therebetween. The reflection unit according to claim 1, further comprising: a notification unit that notifies whether or not the subject is arranged so as to satisfy at least an arrangement condition defined by the reflection unit.   4. The reflection unit according to claim 3, wherein the notification unit is arranged in a region of the subject light flux that is reflected twice by the reflection unit and guided to the image sensor.   5. The reflection unit according to claim 3, wherein the notification unit is disposed on the side of the reflection unit opposite to the side on which the subject is disposed via the passage region.   The reflection unit according to claim 3, wherein the passing region is provided with an index indicating whether the arrangement condition is satisfied.   The reflection unit according to claim 3, wherein the notification unit includes a first illumination unit that illuminates the subject according to the arrangement condition. A second illumination unit different from the first illumination unit for illuminating the subject,
The reflection unit according to claim 7, wherein the first illumination unit illuminates the subject without illuminating the subject by the second illumination unit.   The reflection unit according to claim 7 or 8, wherein the first illumination unit illuminates the illumination direction so as to be oblique to the optical axis of the photographing lens.   The reflecting portion includes a first mirror pair composed of two mirrors facing each other across the optical axis of the photographing lens, and two sheets facing each other across the optical axis and orthogonal to the first mirror pair. The reflection unit according to any one of claims 1 to 9, further comprising a second mirror pair configured by mirrors. A reflection part that is arranged in a region of a peripheral field angle that does not include the center part out of all the field angles of the photographing lens, and reflects a part of the subject light flux to guide the photographing lens;
A reflection unit comprising: an internal space in which the subject light beam is reflected by the reflection portion; and a passage portion that allows light to pass between an external space that is outside the internal space.

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