JP2020137114A - Imaging apparatus and imaging optical system - Google Patents

Abstract

To provide an imaging apparatus or the like capable of responding to a demand of miniaturization, while maintaining excellent imaging performance.SOLUTION: The imaging apparatus includes a plurality of optical systems which form a subject image, a plurality of imaging sensors which correspond to the plurality of optical systems respectively, a common transmission optical element through which the respective optical paths of the plurality of optical systems pass, and a housing part which stores the optical systems, the imaging sensors, and the transmission optical element and has a peripheral surface along the circumferential direction of a reference axis. At least two of the plurality of optical systems include peripheral surface lenses arranged along the peripheral surface and located on the most object side and first optical paths crossing each other inside the transmission optical element, respectively.SELECTED DRAWING: Figure 8

Description

The present invention relates to an imaging device and an imaging optical system.

In Patent Documents 1 and 2, as an example of an omnidirectional imager (omnidirectional camera), a wide-angle lens having an angle of view wider than 180 degrees and an image sensor that captures an image by the wide-angle lens have the same structure. The images captured by each imaging optical system are combined and 4π.
An omnidirectional imaging device that obtains an image within a solid angle of radians is disclosed.

Japanese Unexamined Patent Publication No. 2013-066163 Japanese Patent No. 6142467

In the technical field of imaging devices, research and development are underway to meet the demand for miniaturization while maintaining excellent imaging performance. However, the imaging devices of Patent Documents 1 and 2 have room for improvement in that they cannot meet the above requirements.

The present invention has been made based on the above awareness of the problems, and an object of the present invention is to provide an imaging device and an imaging optical system capable of meeting the demand for miniaturization while maintaining excellent imaging performance.

The image pickup apparatus according to one aspect of the present invention has a plurality of optical systems for forming a subject image, a plurality of image pickup sensors corresponding to each of the plurality of optical systems, and a common optical path through which each of the plurality of optical systems passes. The transmissive optical element of the above, the optical system, the image pickup sensor, and the housing portion which accommodates the transmissive optical element and has a peripheral surface along the circumferential direction of the reference axis, and at least two of the plurality of optical systems are peripheral. It has a peripheral lens located on the most object side arranged along the surface and a first optical path intersecting with each other inside the transmission optical element.

According to the present invention, it is possible to provide an image pickup apparatus and an image pickup optical system capable of meeting the demand for miniaturization while maintaining excellent image pickup performance.

It is a figure which shows the appearance structure of the image pickup apparatus by this embodiment. It is sectional drawing which shows the internal structure of the image pickup apparatus by this Embodiment. It is an enlarged view which shows the optical design of a peripheral optical system, a peripheral image sensor, and hexagonal glass. It is an enlarged view which shows the positional relationship of a peripheral optical system, a peripheral image sensor, and hexagonal glass. It is an enlarged view which shows the positional relationship of an end face optical system, an end face image sensor, a peripheral surface optical system, a peripheral surface image pickup sensor, and hexagonal glass. It is a conceptual diagram which shows an example of the component arranged in each area of a housing. It is a functional block diagram which shows the internal structure of the image pickup apparatus by this embodiment. It is an enlarged view which shows the positional relationship of the optical path of a peripheral optical system, a peripheral image sensor, and hexagonal glass. It is a figure which shows the relationship of the circumferential angle of view of a peripheral surface image sensor. It is an enlarged view which shows the positional relationship between a reference axis, the 1st lens L1 and a peripheral surface image sensor. It is a perspective view for demonstrating the arrangement of the peripheral lens L1 and the peripheral image sensor. It is a figure explaining the relationship between the effective pixel area of a peripheral surface image sensor, and the subject image imaged by the peripheral surface optical system. It is an enlarged view which shows the positional relationship of the optical path of a peripheral optical system and a peripheral image sensor, the optical path of an end surface optical system and an end surface image sensor, and hexagonal glass.

1A to 1C are views showing the appearance configuration of the image pickup apparatus 1 according to the present embodiment. 1A is a side view, FIG. 1B is a perspective view, and FIG. 1C is a plan view.

As shown in FIGS. 1A to 1C, the image pickup apparatus 1 has a housing 10 extending in the longitudinal direction. In the following, the longitudinal direction of the housing 10 coincides with the vertical direction (vertical direction), one end side of the housing 10 in the longitudinal direction is directed to the upper end side, and the other end side of the housing 10 in the longitudinal direction is directed to the lower end side. The case will be described as the basic posture of the housing 10.

The housing 10 is positioned on the upper end side (one end side in the longitudinal direction) and has a circumferentially projecting portion 11 having a rounded shape and projecting in the circumferential direction. The housing 10 is located on the lower end side (the other end side in the longitudinal direction) and has a downward projecting portion 12 having a rounded shape and projecting downward. The housing 10 is located between the circumferential protrusion 11 and the downward protrusion 12 in the vertical direction (longitudinal direction).
It has a fixed diameter portion 13 which is located on the intermediate side of the above and has a fixed diameter in the circumferential direction. The fixed diameter portion 13 constitutes a grip portion for the user to grip at the time of photographing by the imaging device 1. It should be noted that the provision on the intermediate side in the vertical direction (longitudinal direction) located between the circumferential protrusion 11 and the downward protrusion 12 is not limited to the constant diameter portion 13. For example, it may have a tapered shape in which the diameter is reduced from the upper side to the lower side. Alternatively, the shape may have a radius that varies in a plurality of steps (for example, two steps, three steps, etc.). Furthermore, it may have a shape other than a cylindrical shape (for example, a triangular prism or a square prism). That is, the shape when cut on a flat surface is not limited to one.

By providing the downward projecting portion 12 on the lower end surface of the housing 10, it is possible to prevent the user from mounting the housing 10 on the mounting surface (for example, a table or the like) while maintaining the basic posture of the housing 10. Can be done. It is assumed that the lower end surface of the housing 10 is flattened and mounted on the mounting surface. In this case, since the contact area between the lower end surface of the housing 10 and the mounting surface is very small, there are minor causes such as inadvertent contact with a person or object on the housing 10 or a strong wind blowing during outdoor shooting. Then, the housing 10 may fall down and collide with the mounting surface, resulting in damage (for example, lens cracking). In this embodiment
By preventing the user from mounting the housing 10 on the mounting surface while maintaining the basic posture of the housing 10, it is possible to prevent damage due to the above-mentioned trivial cause.

FIG. 2 is a cross-sectional view showing the internal configuration of the image pickup apparatus 1 according to the present embodiment.

As shown in FIG. 2, the image pickup apparatus 1 has a first region S1, a second region S2, and a third region S3 in the vertical direction (longitudinal direction). The first region S1 is the upper end side of the imaging device 1 (
It is located on one end side in the longitudinal direction), the second region S2 is located on the intermediate side in the vertical direction (longitudinal direction) of the imaging device 1, and the third region S3 is the lower end side (longitudinal direction) of the imaging device 1. The other end in the longitudinal direction)
Is located in.

In the first region (partial region in the longitudinal direction) S1 of the image pickup apparatus 1, one optical system (end face optical system) 20 whose part is exposed on the upper surface (end face in the longitudinal direction) of the housing 10 and Vertical direction of the housing 10 (
Three optical systems (peripheral optical systems) 30 that are partially exposed are arranged on the peripheral surfaces that intersect in the longitudinal direction). Further, in the first region S1, one imaging sensor (end face imaging sensor) 40 for forming an image by one optical system (end face optical system) 20 and three optical systems (peripheral optical system) 30 are used. Three image pickup sensors (peripheral surface image pickup sensors) 50 on which an image is formed are arranged. The image sensor 40 is held by the image sensor holding board 41, and the image sensor 50 is held by the image sensor holding board 51. As described above, in the first region S1, four optical systems 20 and 30 and four image pickup sensors 40 and 50 for forming an image by the four optical systems 20 and 30 are arranged.

Hexagonal glass is located in the first region S1 of the image pickup apparatus 1 as a common transmission optical element located on the optical paths of the four optical systems 20 and 30 and transmitting the subject light flux passing through the four optical systems 20 and 30. (Hexagonal prism) 60 is arranged. The hexagonal glass 60 can be, for example, an optical element that does not have optical functions such as spectroscopy, bending, and polarization, but has only a transmission function.

With reference to FIGS. 3 to 5, four optical systems (end face optical system and peripheral optical system) 20 and 30, four imaging sensors (end face imaging sensor and peripheral surface imaging sensor) 40 and 50, and hexagonal glass. The configuration with the 60 and the positional relationship with each other will be described in detail.

The "imaging optical system" of the present embodiment is composed of four optical systems (end face optical system and peripheral optical system) 20, 30 and hexagonal glass 60.

FIG. 3 is an enlarged view showing the optical design of the optical system (peripheral optical system) 30, the image sensor (peripheral image sensor) 50, and the hexagonal glass 60. In FIG. 3, only one set of the three sets of the optical system (peripheral optical system) 30 and the image sensor (peripheral surface image sensor) 50 is drawn, but the other sets also have the same optical design. .. Further, the optical system (end face optical system) 20 and the image pickup sensor (end face image pickup sensor) 40 have the same optical design as the optical system (peripheral surface optical system) 30 and the image pickup sensor (peripheral surface image pickup sensor) 50, or the optical design. It has one scaled in the expansion direction.

As shown in FIG. 3, the optical system (peripheral optical system) 30 is located on the front lens group 30F located on the object side of the hexagonal glass 60 and on the image side of the hexagonal glass 60 with the hexagonal glass 60 as a boundary. It has a rear lens group 30R.

The front lens group 30F has a first lens L1, a second lens L2, and a third lens L3 in this order from the object side to the image side. The posterior lens group 30R has a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 in this order from the object side to the image side. Between the posterior lens group 30R (8th lens L8) and the image sensor 50,
Cover glass CG is arranged.

Here, the "plurality of lenses" can mean the first lens L1 located closest to the object side of one optical system (end face optical system) 20 and three optical systems (peripheral optical system) 30. Each of the first lenses L1 as the "plurality of lenses" is exposed on the outer surface of the housing 10 of the image pickup apparatus 1. The first lens L1 of the optical system (end face optical system) 20 may be called an "end face lens", and the first lens L1 of the optical system (peripheral optical system) 30 may be called a "peripheral lens". As shown in FIG. 1C, the outer surface of the circumferential protrusion 11 of the housing 10 and the plurality of lenses (first lens, end face lens) L1 exposed therein form the same (common) curved surface. In addition, the first optical system (peripheral optical system) 30
In the present embodiment, the lens L1 is disclosed as being cut in the longitudinal direction for the purpose of reducing the radius, but the lens L1 is not limited to this, and may be a circular or elliptical lens.

The hexagonal glass 60 can be, for example, a single member made of a material (glass material) having a refractive index n satisfying n> 1.51.

The hexagonal glass 60 has an incident surface 61 on which the subject light flux from the front lens group 30F is incident, and an exit surface 62 on which the subject light flux transmitted through itself is emitted to the rear lens group 30R. The incident surface 61 and the exit surface 62 of the hexagonal glass 60 are provided with three each corresponding to the three optical systems 30 and the image sensor 50 (the incident surface 61 and the exit surface 62 are alternately provided). ). Further, the upper surface of the hexagonal glass 60 is an incident surface 63 on which the subject luminous flux from the optical system (end face optical system) 20 is incident, and the lower surface of the hexagonal glass 60 is an imaging sensor (end face) in which the subject luminous flux transmitted through itself is incident. It is an exit surface 64 that emits light to the image sensor) 40.

The three entrance surfaces 61 and the exit surfaces 62 on the peripheral surface of the hexagonal glass 60 face each other. Further, the entrance surface 63 on the upper surface of the hexagonal glass 60 and the exit surface 64 on the lower surface face each other. 3
The subject luminous flux passing through the two optical systems (peripheral optical systems) 30 travels straight inside the hexagonal glass 60 (between each of the three incident surfaces 61 and the exit surface 62). Further, the subject luminous flux passing through one optical system (end face optical system) 20 travels straight inside the hexagonal glass 60 (between the entrance surface 63 and the exit surface 64).

The entrance surface 63 and the exit surface 64 of the hexagonal glass 60 may be referred to as a "first surface" and a "second surface" other than the three entrance surfaces 61 and the exit surface 62, respectively.

Incident surface 61 (corresponding to optical system 30) and incident surface 63 (corresponding to optical system 20) of hexagonal glass 60
May be referred to as a "first incident surface" and a "second incident surface" that are perpendicular to each other. Further, the exit surface 62 (corresponding to the image sensor 50) and the exit surface 64 (corresponding to the image sensor 40) of the hexagonal glass 60 are called "first exit surface" and "second exit surface" which are perpendicular to each other. It may be. In this case, the "first incident surface" and the "first exit surface" face each other, and the "second incident surface" and the "second exit surface" face each other.

The incident surface 61, the exit surface 62, the incident surface 63, and the exit surface 64 of the hexagonal glass 60 may be polished. Further, the incident surface 61, the exit surface 62, the incident surface 63, and the exit surface 64 of the hexagonal glass 60 may be provided with an antireflection coat for preventing ghost generation.

Inside the hexagonal glass 60, subject light beams passing through one optical system (end face optical system) 20 and three optical systems (peripheral optical system) 30 intersect. In this way, one optical system (end face optical system) 20
By providing the hexagonal glass 60 as a transmission optical element common to the three optical systems (peripheral optical systems) 30, the entire optical length is secured and excellent imaging performance (high resolution) is obtained, and imaging is performed. The space efficiency of the device 1 can be improved, and the image pickup device 1 can be miniaturized.

Immediately before the three incident surfaces 61 of the hexagonal glass 60, a parallel flat plate (parallel flat glass) 65 is provided to secure a long design optical total length of the three optical systems (peripheral optical system) 30. There is. Immediately after the three exit surfaces 62 of the hexagonal glass 60, an aperture diaphragm 66 for determining the aperture diameter of the optical system 30 is provided.

Due to the restrictions of general optical design, it is required that the aperture diaphragm 66 is provided at a position near 1/2 of the total optical length D0. However, in the present embodiment, the hexagonal glass 60 as a common transmission optical element is provided in the vicinity of 1/2 of the total optical length D0. Therefore, the incident surface 61 of the hexagonal glass 60
By providing the parallel flat plate 65 in the above, in addition to the effect of providing the hexagonal glass 60 as described above (auxiliary), the total optical length can be secured longer. Parallel flat plate 65
Arranges the aperture diaphragm 66 at a position that does not interfere with the optical path of each optical system, in this case, immediately after the exit surface 62.

As shown in FIG. 3, of the total optical length D0 of the optical system (peripheral optical system) 30, the front lens group 3
The distance from the object-side surface of 0F (first lens L1) to the hexagonal glass 60 is defined as D1, and the distance from the image-side surface of the rear lens group 30R (eighth lens L8) to the hexagonal glass 60 is defined as D2. When, D1> D2 is satisfied. Further, when the distance from the image sensor 50 or the image sensor holding substrate 51 holding the image sensor 50 to the hexagonal glass 60 is defined as D2', D2≈D2' is satisfied. As a result, the optical system (peripheral surface optical system) 30, the imaging sensor (peripheral surface imaging sensor) 50, and the hexagonal glass 60 are arranged so as to fit inside the circumferentially projecting portion 11 of the housing 10 with a minute clearance. The size of the image pickup apparatus 1 can be reduced (smaller diameter).

FIG. 4 is an enlarged view showing the positional relationship between the optical system (peripheral optical system) 30, the image sensor (peripheral image sensor) 50, and the hexagonal glass 60.

As shown in FIG. 4, the hexagonal glass 60 is located in the center of the inside of the circumferential protrusion 11 of the housing 10, and three optical systems (peripheral surfaces) are located in the peripheral portion around the hexagonal glass 60. Optical system) 30
And the image sensor (peripheral surface image sensor) 50 are located. Further, the circumferential protrusion 1 of the housing 10
When a virtual circle along the outer shell in the circumferential direction inside 1 is defined, the lens L1 on the most object side of the three optical systems (peripheral optical system) 30 and the three imaging sensors (3 imaging sensors) are placed on the virtual circle. Peripheral surface imaging sensor)
50 and 50 are alternately (radially) located in the circumferential direction. Three optical systems (peripheral optical system) 30
By sharing the hexagonal glass 60, the three optical systems (peripheral optical systems) 30 intersect between the optical total lengths D0 (see FIG. 3). As a result, the optical system (peripheral surface optical system) 30, the imaging sensor (peripheral surface imaging sensor) 50, and the hexagonal glass 60 are arranged so as to fit inside the circumferentially projecting portion 11 of the housing 10 with a minute clearance. The size of the image pickup apparatus 1 can be reduced (smaller diameter).

As shown in FIGS. 3 and 4, the horizontal angle of view of each of the three optical systems (peripheral optical system) 30 is set to A (°).
), A> 120 is satisfied.

FIG. 5 is an enlargement showing the positional relationship between the optical system (end face optical system) 20, the image sensor (end face image sensor) 40, the optical system (peripheral optical system) 30, and the image sensor (peripheral surface image sensor 50 and the hexagonal glass 60). It is a figure.

As shown in FIG. 5, the hexagonal glass 60 is located at the center of the inside of the circumferentially projecting portion 11 of the housing 10, and each one optical system (1 optical system) extends in the vertical direction around the hexagonal glass 60. The end face optical system) 20 and the image sensor (end face image sensor) 40 are located. Further, when a virtual circle along the outer shell in the circumferential direction inside the circumferential protrusion 11 of the housing 10 is defined, the inside of the virtual circle is
Each one optical system (end face optical system) 20 and an image sensor (end face image sensor) 40 are located. One optical system (end face optical system) 20 and three optical systems (peripheral optical system) 30 are hexagonal glass 6.
By sharing 0, they intersect between the total optical lengths D0 of each optical system. This will
An optical system (end face optical system) 20, an image sensor (end face image sensor) 40, an optical system (peripheral optical system) 30, and an image sensor (so that the housing 10 fits inside the circumferential protrusion 11 with a minute clearance. Peripheral surface imaging sensor) 50 and hexagonal glass 60 are arranged to reduce the size (smaller diameter) of the imaging device 1.
Can be planned.

In the present embodiment, an optical system (end face optical system) 20 for photographing the zenith direction is provided to improve the image quality in the zenith direction (increase the resolution), and the optical system (end face optical system) 20 is an optical system (peripheral). The surface optical system) 30 and the hexagonal glass 60 are shared. That is, the optical system (peripheral optical system)
30 utilizes the entrance surface 61 and the exit surface 62 (first entrance surface and the first exit surface) of the hexagonal glass 60, while the optical system (end face optical system) 20 utilizes the entrance surface 63 and the exit surface of the hexagon glass 60. 64 (1st
A second incident surface and a second exit surface that are perpendicular to the incident surface and the first exit surface) are used. As a result, the size of the image pickup apparatus 1 (reduction in diameter) is realized.

As shown in FIG. 5, the vertical angle of view of one optical system (end face optical system) 20 is set to B (°). This vertical angle of view B (°) satisfies B> 120. The magnitude relationship between the horizontal angle of view A (°) of the optical system (peripheral optical system) 30 and the vertical angle of view B (°) of the optical system (end face optical system) 20 is A> B.
, A = B, A <B. Horizontal angle of view A (°) of the optical system (peripheral optical system) 30
) And the vertical angle of view B (°) of the optical system (end face optical system) 20 overlap, the image captured by the optical system (peripheral optical system) 30 is cut off at the overlapping portion, and the optical system (end face optical system) ) 20
You may perform image processing using the image captured by. On the other hand, the optical system (peripheral optical system) 30
The image imaged in the downward direction by the above may be subjected to image processing in which all the images are used without being truncated.

The three imaging sensors (peripheral surface imaging sensors) 50 have a long side extending parallel to the longitudinal direction (vertical direction) of the housing 10 and a short side extending parallel to the direction orthogonal to the longitudinal direction (horizontal direction) of the housing 10. It has a rectangular shape composed of sides. The first lens L1 of the optical system (peripheral optical system) 30 is
By being cut and having a long shape in the longitudinal direction, it has a high angle of view in the longitudinal direction and a low angle of view (for example,> 120 °) in the direction perpendicular to the longitudinal direction (short direction). Also, the first lens L1
The diameter (size) can be reduced by cutting a part of the overlapping region. Therefore, the shape of the image pickup sensor (peripheral surface image sensor) 50 is changed to the optical system (peripheral surface optical system) 30.
The shape is set to be long in the longitudinal direction according to the shape of.

Returning to FIG. 2, in the second region S2 of the image pickup apparatus 1, a substrate (a substrate) that receives image signals output from one image pickup sensor (end face image sensor) 40 and three image pickup sensors (peripheral surface image sensor) 50. The control board) 70 is arranged. The substrate 70 and the image sensor 40, 50 are electrically connected by a wiring member 71 such as a flexible substrate.

Here, the substrate 70 is, for example, excluding the wiring member for connecting to the optical systems 20, 30 and the battery 80, and may include a chip or the like soldered on the substrate 70. ..

A USB charging unit 72 is provided on the outer shell of the second region S2 of the image pickup apparatus 1. USB
The charging unit 72 projects laterally from the substrate 70 and is exposed to the outer shell of the second region S2. In this exposed portion, the charging state by the USB charging unit 72 may be displayed.

A power switch 73 and a shutter switch 74 are provided on the outer shell of the second region S2 of the image pickup device 1 as operation function units related to the image pickup device 1. The power switch 73 and the shutter switch 74 project laterally from the substrate 70 and are exposed to the outer shell of the second region S2. When the user operates the power switch 73, the power of the imaging device 1 is turned on / off, and when the user operates the shutter switch 74, the imaging of the imaging device 1 is started / ended. The power switch 73 and the shutter switch 74 are arranged so that, for example, a user who holds the fixed diameter portion (grip portion) 13 of the housing 10 can operate it with his / her thumb.

As shown in FIG. 2, a battery 80 as a power supply means is provided in the third region S3 of the image pickup apparatus 1. The battery 80 is electrically connected to the substrate 70 by a wiring member 75 such as a flexible substrate. The battery 80 supplies electric power to the substrate 70 via the wiring member 75, and further supplies electric power to the image pickup sensors 40 and 50 via the wiring member 71. The battery 80 may directly supply electric power to the image sensor 40, 50 without passing through the substrate 70, the wiring members 71, 75, and the like.

Here, the battery 80 as the power supply means is, for example, the optical systems 20, 30 and the substrate 7.
It is possible to exclude the wiring member for connecting to 0 mag.

As described above, in the present embodiment, the optical systems 20 and 30 are arranged in the first region S1 of the image pickup apparatus 1, the substrate 70 is arranged in the second region S2 of the image pickup apparatus 1, and the third image pickup apparatus 1 is arranged. The battery (power supply means) 80 is arranged in the area S3 of the above. More specifically, the lens L1 located closest to the object side of the plurality of optical systems is arranged in the first region S1, the substrate 70 is arranged in the second region S2, and the battery (power supply means) 80 is arranged. It is arranged in the area S3 of 3. Further, the first region S1 to the third region S3 do not overlap in the direction perpendicular to the longitudinal direction of the housing 10. Further, the lens L1 located closest to the object side of the plurality of optical systems, the substrate 70, and the battery (power supply means) 80 are arranged at positions that do not overlap in the direction perpendicular to the longitudinal direction of the housing 10. .. Further, the plurality of optical systems 20 and 30, the substrate 70, and the battery (power supply means) 80 do not straddle the plurality of regions (first region S1 to third region S3). In this way, by narrowing down each of the first region S1 to the third region S3, which is the arrangement space inside the housing 10, and arranging the respective components, the imaging device 1 is downsized (reduced in diameter). Has been realized.

Further, in the present embodiment, a plurality of lenses L1 having a relatively small weight are held in the first region S1 on the upper end side of the housing 10, while being compared with the third region S3 on the lower end side of the housing 10. By holding the battery (power supply means) 80 having a large target weight, the center of gravity of the image pickup apparatus 1 is set below the intermediate portion in the vertical direction. Therefore, even if the user accidentally drops the image pickup device 1, the housing 10 holds the battery 80 instead of the upper end side (first region S1) of the housing 10 where the plurality of lenses L1 are exposed. The lower end side (third region S3) of the image pickup device 1 will land, and damage to the image pickup apparatus 1 (lens cracking) can be prevented.

6A and 6B are conceptual diagrams showing an example of components arranged in each region of the image pickup apparatus 1. FIG. 6A corresponds to FIG. 2, in which the upper end side (one end side in the longitudinal direction) of the image pickup device 1 is set as the first region S1 and a plurality of lenses L1 are held therein, and the image pickup device 1 is held in the vertical direction (longitudinal direction). The intermediate side of the direction) is set as the second region S2, and the substrate 70 is held there, and the lower end side (the other end side in the longitudinal direction) of the image pickup apparatus 1 is set as the third region S3, and the battery 80 is held there. .. FIG. 6B is shown in FIG.
It is a modification of A, and it is common that the upper end side (one end side in the longitudinal direction) of the image pickup apparatus 1 is set as the first region S1 and a plurality of lenses L1 are held there, but the lower end side (one end side in the longitudinal direction) of the image pickup apparatus 1 ( The point where the substrate 70 is held there with the other end side in the longitudinal direction as the second region S2, and the battery 80 is held there with the intermediate side in the vertical direction (longitudinal direction) of the imaging device 1 as the third region S3. Is different.
In the case of FIG. 6B, the distance between the plurality of lenses L1 held in the first region S1 and the power switch 73 and the shutter switch 74 as the operation function unit held in the second region S2 is largely secured. , It is possible to more effectively prevent the reflection of the user's fingers in the captured image. Although not shown, the power switch 73 and the shutter switch 74 as the operation function unit may be provided in the second region S2 of FIG. 6A and the third region S3 of FIG. 6B.

FIG. 7 is a functional block diagram showing an internal configuration of the image pickup apparatus 1 according to the present embodiment. As shown in FIG. 7, the image pickup apparatus 1 includes a charging power acquisition unit 90, an image transmission unit (transmission unit) 100, a signal processing unit 110, and a shooting instruction signal reception unit 120.

Charging power acquisition unit 90, image transmission unit 100, signal processing unit 110, and shooting instruction signal reception unit 12
0 can be composed of, for example, a chip formed on the substrate 70. That is, the substrate 70 can have these functional constituent blocks.

The charging power acquisition unit 90 is composed of, for example, an electric contact or a power receiving unit provided in the downward projecting portion 12 of the housing 10. When the downward projecting portion 12 of the housing 10 is set as a supported portion on the support portion of the charger (not shown), the charging power acquisition portion 90 acquires charging power from the electric contact of the charger or the power transmitting portion (not shown). To do. This charging power is supplied to the battery 80.

The image transmission unit 100 transmits four image signals by the four image pickup sensors 40 and 50 input to the substrate 70 to an external device (for example, an external terminal such as a smartphone) (wired transmission or wireless transmission).
To do. The external device generates a spherical image (for example, a spherical panoramic image) or a hemispherical image by synthesizing four image signals received from the image transmitting unit 100. At this time, if the horizontal angle of view A (°) of the optical system (peripheral optical system) 30 and the vertical angle of view B (°) of the optical system (end face optical system) 20 overlap, the external device is in the overlapping portion. , The image captured by the optical system (peripheral optical system) 30 may be truncated, and image processing using the image captured by the optical system (end face optical system) 20 may be executed. On the other hand, the external device may perform image processing in which all the images captured in the downward direction by the optical system (peripheral optical system) 30 are used without being truncated.

The signal processing unit 110 performs signal processing on four image signals by the four image pickup sensors 40 and 50 input to the substrate 70. The signal processing unit 110 can execute signal processing (image processing) similar to the signal processing (image processing) by the above-mentioned external device. That is, the signal processing unit 110 generates a spherical image by synthesizing four image signals by the four image pickup sensors 40 and 50 input to the substrate 70. At this time, if the horizontal angle of view A (°) of the optical system (peripheral optical system) 30 and the vertical angle of view B (°) of the optical system (end face optical system) 20 overlap, the signal processing unit 110 overlaps. In the portion, the image captured by the optical system (peripheral optical system) 30 may be truncated, and image processing using the image captured by the optical system (end face optical system) 20 may be executed. On the other hand, the signal processing unit 110 may execute image processing in which all the images captured in the downward direction by the optical system (peripheral optical system) 30 are used without being truncated. The signal processing unit 110 is the above-mentioned external device (
For example, at least a part of the processing by an external terminal such as a smartphone) may be executed.

The signal processing unit 110 can be realized by a chip formed on the substrate 70. For example, the signal processing unit 110 uses a CPU (Central Processing U) on a chip formed on the substrate 70.
nit) Functional unit, RAM (Random Access Memory) functional unit, ROM (Read Only Memory)
) It can be realized by SoC (System on a Chip) in which various functional units such as a functional unit and a GPU (Graphics Processing Unit) functional unit are embedded.

The shooting instruction signal receiving unit 120 receives a shooting instruction signal from an external device (for example, an external terminal such as a smartphone). Based on this imaging instruction signal, the imaging process by the imaging device 1 can be executed.

As described above, the image pickup apparatus 1 of the present embodiment includes the plurality of optical systems 20 and 30 and the plurality of optical systems 2.
A common transmission optical element that is located on the optical path of the plurality of optical systems 20 and 30 and transmits a subject light flux passing through the plurality of optical systems 20 and 30 and a plurality of image pickup sensors 40 and 50 that form an image of 0 and 30. Hexagonal glass 60 and the like. As a result, it is possible to meet the demand for miniaturization while maintaining excellent imaging performance.

Further, the image pickup apparatus 1 of the present embodiment includes a plurality of optical systems 20 and 30 each of which are composed of a plurality of lenses, and a plurality of image pickup sensors 40 and 50 in which an image formed by the plurality of optical systems 20 and 30 is formed.
It has a substrate 70 that receives image signals output from the plurality of image pickup sensors 40 and 50, and a battery 80 as a power supply means for supplying power to the plurality of image pickup sensors 40 and 50 and the substrate 70. Then, the image pickup apparatus 1 has the first, second, and third regions S1, S2, and S in the longitudinal direction.
3 and the lens (first lens) L1 located closest to the object side of the plurality of optical systems 20 and 30 is arranged in the first region S1, the substrate 70 is arranged in the second region S2, and the battery. (
The power supply means) 80 is arranged in the third region. Further, the lens (first lens) L1 located closest to the object side of the plurality of optical systems 20 and 30, the substrate 70, and the battery (power supply means) 80 are arranged in a direction perpendicular to the longitudinal direction of the housing 10. It is placed in a position that does not overlap. That is, the plurality of lenses L1, the substrate 70, and the battery 80 are arranged in the regions assigned to each region without straddling the two regions. This makes it possible to meet the demand for miniaturization of the image pickup apparatus 1.

In the above embodiment, the case where the lower end surface (the other end surface) of the housing 10 in the longitudinal direction is provided with the downward projecting portion 12 having a rounded shape has been described as an example. It is also possible to provide an upward protrusion having a rounded shape on the end face (one end face). It is also possible to provide both a downward protrusion and an upward protrusion.

In the above embodiment, one optical system (end face optical system) 20 facing the upper surface of the housing 10 and one imaging sensor (end face imaging sensor) 40 corresponding to the optical system (end face optical system) 20 are provided, and an optical system (peripheral) facing the peripheral surface of the housing 10 is provided. The case where three image pickup sensors (peripheral surface image sensor) 50 corresponding to the surface optical system) 30 are provided for each example has been described. However, there is a degree of freedom in the number of optical systems and image pickup sensors provided in the image pickup apparatus 1.

In the above embodiments, the case where the spherical image is captured by the imaging device 1 has been described as an example, but a panoramic image can be acquired in addition to the spherical image. In this case, the vertical angle of view of the plurality of lenses L1 may be about 120 °. Further, although the image quality in the upward direction is slightly deteriorated, the image sensor (end face image sensor) 40 corresponding to the optical system (end face optical system) 20
It is also possible to create a spherical image by removing (omission).

In the above embodiments, a case where a hexagonal glass 60 made of a single member is used as a common transmission optical element has been illustrated and described. However, there is a degree of freedom regarding the shape of the common transmission optical element, and various design changes are possible. For example, the prismatic structure of glass as a common transmission optical element may be changed according to the number of optical systems and imaging sensors provided in the image pickup apparatus 1 (in this case, the incident surface and the exit surface are changed according to the prismatic structure of glass). The number of faces can also vary). Further, the common transmission optical element may not be composed of a single member, but may be composed of a plurality of members and then combined.

In the above embodiment, the case where the parallel flat plate 65 is provided on the incident surface 61 of the hexagonal glass 60 has been illustrated and described. However, it is also possible to provide the parallel flat plate 65 on the exit surface 62 of the hexagonal glass 60. Further, it is also possible to provide a parallel flat plate 65 on the entrance surface 61 and the exit surface 62 of the hexagonal glass 60. It is also possible to give the parallel flat plate 65 a small curvature (large radius of curvature) that is as close to a flat surface as possible, rather than a perfect flat surface. It is also possible to omit the parallel flat plate 65.

In the above embodiment, the case where the substrate 70 and the power switch 73 and the shutter switch 74 as the operation function unit are provided in the second region S2 of the image pickup apparatus 1 has been illustrated and described.
However, the power switch 73 and the shutter switch 74 as the operation function unit are used in the imaging device 1.
It is also possible to provide the first region S1 or the third region S3 of the above.

A slight supplementary explanation will be given to the present embodiment described above. FIG. 8 is a simplified view of FIG. 4, and is an enlarged view showing the positional relationship between the first optical path OP1, which is the optical path of the peripheral optical system 30, the peripheral image sensor 50, and the hexagonal glass 60. As described above, the circumferential protrusion 11 of the housing 10 accommodates three sets of peripheral optical systems 30 (30-1, 30-2, 30-3) in the radial direction centering on the hexagonal glass 60. Has been done. Each peripheral optical system 30 has a front lens group located on the object side of the hexagonal glass 60 and a rear lens group located on the image side, but in the figure, it is on the peripheral surface of the circumferential protrusion 11. Only the peripheral lenses L1 (L1-1, L1-2, L1-3) located along the object side are shown, and the other lenses are omitted.

In the following, the circumferentially projecting portion 11 is simply referred to as a "housing portion", or the standard portion 13 constituting the grip portion and the downward projecting portion 12 located below the fixed portion 13 are collectively referred to as a "second housing portion". On the other hand, it may be referred to as a "first housing portion". When the central axis of the hexagonal column shape of the hexagonal glass 60 is used as a reference axis, the housing portion has a peripheral surface along the circumferential direction of the reference axis. The peripheral lens L1 is fitted into an opening provided on the peripheral surface, so that the lens surface on the object side also forms a part of the peripheral surface. Here, the case where the central axis of the hexagonal column shape of the hexagonal glass 60 and the reference axis of the housing portion coincide with each other, but the reference axis which is the central axis of the peripheral surface of the housing portion is the hexagonal of the hexagonal glass 60. It does not have to coincide with the central axis of the column shape.

In the housing portion, three peripheral surface imaging sensors 50 (50-1, 50-2, 50-3) corresponding to the respective peripheral surface optical systems 30 (30-1, 30-2, 30-3) Is housed. That is, the first peripheral surface optical system 30-1 forms a subject image on the light receiving surface of the first peripheral surface imaging sensor 50-1, and the second peripheral surface optical system 30-2 is the second peripheral surface imaging sensor. A subject image is formed on the light receiving surface of 50-2, and the third peripheral surface optical system 30-3 forms a subject image on the light receiving surface of the third peripheral surface imaging sensor 50-3.

Each peripheral optical system 30 has a first optical path OP1 (OP1-1, OP1-2, OP1-3) in which a paraxial ray reaches the peripheral image sensor 50. Each first optical path OP1 passes through the hexagonal glass 60 and reaches the corresponding peripheral surface imaging sensor 50. At this time, the three first optical paths OP1 (OP1-1, OP1-2, OP1-3) intersect each other inside the hexagonal glass 60.

Here, the optical path of the paraxial light beam of the peripheral optical system 30 is referred to as the first optical path OP1, but the first optical path OP1 may be regarded as the main light beam extending from an arbitrary object point to the peripheral surface imaging sensor 50. .. Further, the fact that the first optical paths OP1 intersect with each other inside the hexagonal glass 60 is not limited to the case where one point is shared three-dimensionally, but may intersect when observed from the upper surface as shown in the figure. That is, they may be twisted to each other three-dimensionally.

In an arrangement that satisfies such a relationship, three peripheral lenses L1 (L1-1, L1-2, L1-3) and three peripheral image sensor 50s (50-1, 50-) corresponding to each are used. 2, 50-3) are alternately arranged along the circumferential direction of the reference axis (virtual circle indicated by the dotted line in the figure). That is, when the virtual circle is traced counterclockwise in order, the first peripheral lens L1-1 → the third peripheral image sensor 50-3 → the second peripheral lens L1-2 → the first peripheral image sensor 50-1. → 3rd peripheral lens L1-3 → 2nd peripheral image sensor 50-2 → (1st peripheral lens L1-1). By adopting such a layout, the peripheral optical system 30 and the peripheral image sensor 50 can be accommodated in a narrow space. The peripheral optical system 30 and the peripheral image sensor 50 do not have to be arranged on the same circumference with respect to the reference axis, and may be arranged along the circumferential directions having different diameters from each other.

FIG. 9 is a diagram showing the relationship between the circumferential angle of view of the peripheral surface imaging sensor 50. FIG. 9 is a bird's-eye view of the housing portion so that the subject range captured by each peripheral surface image sensor 50 can be understood after simplifying FIG. 4 as in FIG.

As described above, the circumferential angle of view A (°) of each peripheral image sensor 50 is set to be larger than 120 ° by the combination of the effective pixel region and the peripheral optical system 30. By being set in this way, the circumferential angle of view A of one peripheral surface imaging sensor 50 eventually overlaps with the circumferential angle of view of the adjacent peripheral surface imaging sensor 50. Specifically, as shown in the drawing, the first peripheral surface imaging sensor 50-1 has a circumferential angle of view formed by the first peripheral surface optical system 30-1, and the second peripheral surface imaging sensor 50-2 has a second angle of view. overlap in the range of circumferential angle and C ₁₂ formed by the two peripheral surface of the optical system 30-2, circumferential picture third peripheral surface imaging sensor 50-3 is formed by the third peripheral surface optical system 30-3 It overlaps the corner in the range of C ₃₁ . The second peripheral surface imaging sensor 50-2 is formed by the circumferential angle of view formed by the second peripheral surface optical system 30-2, and the third peripheral surface imaging sensor 50-3 is formed by the third peripheral surface optical system 30-3. The circumferential angle of view is overlapped within the range of C ₂₃ .

By satisfying such a relationship, the image pickup apparatus 1 can obtain a subject image over 360 ° by the three peripheral surface image pickup sensors 50. The image of the image signal output by each peripheral image sensor 50 is slightly distorted in the overlapping angle of view regions due to the aberration of the peripheral optical system 30. The image processing for correcting such distortion of the image and joining and synthesizing the respective images is executed by the signal processing unit 110 or an external device.

FIG. 10 is an enlarged view showing the positional relationship between the reference axis, the first lens L1, and the peripheral surface imaging sensor 50, and is a simplified view of FIG. As shown in the figure, the peripheral optical system 30, the peripheral image sensor 50, and the like are housed in a substantially circular housing portion centered on the hexagonal glass 60 and having the object-side lens surface of the peripheral lens L1 as a part of the peripheral surface. In order to do so, the arrangement relationship shown in the figure may be satisfied. That is, the distance D1 on the optical path from the object-side lens surface (outer surface) of the peripheral lens L1 to the central axis of the hexagonal glass 60 is from the distance D3 on the optical path from the central axis to the image plane of the peripheral optical system 30. Is also big. Further, the distance D1 is larger than the distance D2'from the central axis to the back surface of the image sensor holding substrate 51. When the optical design of the peripheral optical system 30 and the layout design of the substrate are performed so as to satisfy such a relationship, the diameter of the housing portion can be reduced.

FIG. 11 is a perspective view for explaining the arrangement of the peripheral lens L1 and the peripheral image sensor 50. As described above, the peripheral lens L1 has a rectangular shape cut so that one side is longer than the other when viewed from the front. Then, it is arranged along the peripheral surface of the housing portion so that the longitudinal direction thereof is the direction along the reference axis of the housing portion. By adopting such a shape and arrangement of the peripheral lens L1, alternating arrangement of the three peripheral lenses L1 and the three peripheral image sensors 50 described above along the circumferential direction can be easily realized. The peripheral lens L1 is not limited to a rectangular shape when viewed from the front, and may have a shape having a longitudinal direction and a lateral direction. For example, it may have an elliptical shape.

The peripheral surface imaging sensor 50 is arranged in the housing so that the direction along the reference axis is the longitudinal direction of the effective pixel region 50a, which is a pixel region for photoelectrically converting an optical image. Specifically, as will be described later, by arranging in this way, the angle of view in the reference axis direction of the peripheral surface imaging sensor 50 can be made larger than the angle of view in the circumferential direction.

FIG. 12 is a diagram for explaining the relationship between the effective pixel area 50a of the peripheral surface image sensor 50 and the subject image IMG imaged by the peripheral surface optical system 30. As shown in the figure, the size of the subject image IMG is narrow in the longitudinal direction along the reference axis and wide in the circumferential direction with respect to the effective pixel region 50a. In other words, the peripheral optical system 30 is narrower than the effective pixel area 50a in the direction along the reference axis and wider than the effective pixel area 50a in the circumferential direction, and forms a subject image on the light receiving surface.

As described above, the circumferential angle of view of the peripheral surface imaging sensors 50 adjacent to each other is determined in the effective pixel area 50a, and some of them overlap each other. Therefore, in the circumferential direction, the subject image slightly extends beyond the effective pixel area 50a. It is preferable to continue. With the circumferential angle of view determined in this way, the image pickup apparatus 1 can realize the acquisition of the subject image over 360 ° in the circumferential direction. On the other hand, in the reference axis direction, in order to secure a larger angle of view, it is desired to use the subject image up to the boundary, particularly in the downward direction opposite to the zenith direction carried by the end face optical system 20. From this point of view, the above-mentioned imaging relationship is adopted. That is, by arranging the effective pixel region 50a and optically designing the peripheral optical system 30 so as to satisfy such an imaging relationship, a large angle of view in the reference axis direction can be secured, and the angle of view in the reference axis direction can be secured along the circumferential direction. The layout of the peripheral optical system 30 and the peripheral image sensor 50 becomes possible.

FIG. 13 is a simplified view of FIG. 5, in which the first optical path OP1 and the peripheral surface imaging sensor 50 of the peripheral optical system 30, the second optical path OP2 and the end face imaging sensor 40 of the end face optical system 20, and the hexagonal glass are shown. It is an enlarged view which shows the positional relationship of 60. As described above, a set of end face optical systems 20 is housed in the housing portion in the vertical direction centering on the hexagonal glass 60. The end face optical system has a front lens group located on the object side of the hexagonal glass 60 and a rear lens group located on the image side, but in the figure, the most arranged along the end face intersecting the reference axis. Only the end face lens L1-0 located on the object side is shown, and the other lenses are omitted. In the present embodiment, the end face lens L1-0 is arranged along the end face of the housing portion, but the housing portion has a cover glass that protects the end face lens L1-0 as an object more than the end face lens L1-0. You may have it on the side.

The end face imaging sensor 40 is housed in the housing portion corresponding to the end face optical system 20. That is, the end face optical system 20 forms a subject image on the light receiving surface of the end face image sensor 40. The end face optical system 20 has a second optical path OP2 in which the paraxial ray reaches the end face imaging sensor 40. The second optical path OP2 passes through the hexagonal glass 60 and reaches the corresponding end face imaging sensor 40.

Here, the optical path of the paraxial light ray of the end face optical system 20 is referred to as the second optical path OP2, but the second optical path OP2 may be regarded as the main light ray extending from an arbitrary object point to the end face imaging sensor 40.

As described above, three peripheral optical systems 30 and peripheral imaging sensors 50 are arranged in the housing portion in the radial direction, respectively. In the figure, the first peripheral optical system 30-1 and the first peripheral optical system 30-1 are arranged. One peripheral surface imaging sensor 50-1 is shown. As described above, the first optical path OP1-1 passes through the hexagonal glass 60 and reaches the corresponding first peripheral surface imaging sensor 50-1. At this time, the first optical path OP1-1 intersects with the second optical path OP2 inside the hexagonal glass 60, which is a common transmission optical element. Similarly, the first optical path OP1-2 intersects the second optical path OP2 inside the hexagonal glass 60, and the first optical path OP1-3 intersects the second optical path OP2 inside the hexagonal glass 60. Here, the fact that the first optical path OP1 (OP1-1, OP1-2, OP1-3) intersects the second optical path OP2 inside the hexagonal glass 60 is not limited to the case where one point is three-dimensionally shared. It suffices if they intersect when observed from the side as if they were. That is, they may be twisted to each other three-dimensionally.

In the common transmission optical element, it is preferable that the incident surface on which the first optical path OP1 (OP1-1, OP1-2, OP1-3) is incident and the incident surface on which the second optical path OP2 is incident are perpendicular to each other. Further, it is preferable that the exit surface from which the first optical path OP1 (OP1-1, OP1-2, OP1-3) is emitted and the exit surface from which the second optical path OP2 is emitted are perpendicular to each other. Further, it is preferable that the transmission optical element has a pair of an incident surface and an exit surface that correspond one-to-one with each of the end face optical system 20 and the peripheral optical system 30. That is, it is preferable that one incident surface and one exit surface correspond to one optical system. In particular, in each set, it is preferable that the entrance surface and the exit surface face each other. From this point of view, the hexagonal prism-shaped hexagonal glass 60 is most suitable as the transmission optical element of the present embodiment. According to the end face optical system 20 and the peripheral optical system 30 arranged around the hexagonal glass 60, it is possible to easily image a subject image over the entire celestial sphere.

In FIG. 5, for the end face optical system 20, the vertical angle of view B (°) was set to B> 120. For the peripheral optical system 30, the angle of view in the reference axis direction is represented by A (°), which is the same as the angle of view in the circumferential direction, and A> 120. In the example of FIG. 13, assuming that the peripheral lens L1 has a rectangular shape as described above, the angle of view C (°) in the reference axis direction is set to be larger than the angle of view A.

By adopting such a relationship between the angle of view A and the angle of view C, the peripheral surface imaging sensor 50 can capture even a lower subject. That is, with respect to the circumferential angle of view, since the three peripheral image pickup sensors 50 are arranged along the circumferential direction, the circumferential angle of view A captured by one peripheral image sensor 50 may be larger than 120 °. On the other hand, since the optical system oriented in the direction opposite to the zenith direction and the corresponding image pickup sensor are not provided, the range captured by the peripheral surface image pickup sensor 50 is the limit for the subject below. Therefore, it is important to increase the angle of view C in order to capture an image of a lower subject. Therefore, C> A is set.

Further, since the end face optical system 20 can capture a subject in a certain range in the zenith direction with the end face image sensor 40, a part of the angle of view B of the end face image sensor 40 and a part of the angle of view A of the peripheral surface image sensor 50 The range captured by the peripheral surface imaging sensor 50 may be tilted downward in the range where the two are overlapped with each other. By tilting downward in this way, it is possible to capture a subject further below without causing a defect in the subject image in the zenith direction. Further, although B> 120 is set in the example of FIG. 13, B may be set to be smaller than 120 ° as long as the peripheral optical system 30 has an angle of view that captures the subject above.

In the present embodiment described above, the number of peripheral optical systems 30 is not limited to three. The number of peripheral optical systems 30 and peripheral imaging sensors 50 may be increased within the range allowed by the size of the housing. In that case, the shape of the transmission optical element is changed according to the number of peripheral optical systems 30. Further, if the size of the housing portion allows, the transmission optical element (hexagonal glass 60) for shortening the optical path length may be omitted.

1 Imaging device 10 Housing 11 Circumferential protrusion 12 Downward protrusion 13 Fixed diameter part (grip part)
20 Optical system (end face optical system, imaging optical system)
30 Optical system (peripheral optical system, imaging optical system)
30F Front lens group 30R Rear lens group 40 Imaging sensor (end face imaging sensor)
41 Image sensor holding substrate 50 Image sensor (peripheral surface image sensor)
51 Imaging sensor holding substrate 60 Hexagon glass (hexagon prism, common transmission optical element, imaging optical system)
61 Incident surface (first incident surface)
62 Emission surface (first exit surface)
63 Incident surface (first surface, second incident surface)
64 Ejection surface (second surface, second exit surface)
65 Parallel flat plate (parallel flat glass)
66 Aperture aperture 70 Board (control board)
71 Wiring member 72 USB charging unit 73 Power switch (operation function unit)
74 Shutter switch (operation function unit)
75 Wiring member 80 Battery (power supply means)
90 Charging power acquisition unit 100 Image transmission unit (transmission unit)
110 Signal processing unit 120 Shooting instruction signal receiving unit CG cover glass L1 1st lens (end face lens, peripheral lens)
L2 2nd lens L3 3rd lens L4 4th lens L5 5th lens L6 6th lens L7 7th lens S1 1st area S2 2nd area S3 3rd area

Claims (15)

Multiple optical systems that form a subject image and
A plurality of imaging sensors corresponding to each of the plurality of optical systems and
A common transmission optical element through which each optical path of the plurality of optical systems passes, and
It includes the optical system, the image pickup sensor, and the transmission optical element, and includes a housing portion having a peripheral surface along the circumferential direction of the reference axis.
At least two of the plurality of optical systems each have a peripheral lens located on the most object side arranged along the peripheral surface and a first optical path intersecting each other inside the transmission optical element. Imaging device. A claim that the angle of view of the image sensor corresponding to each of the optical systems having the first optical path among the plurality of image sensors is partially overlapped with the angle of view of the adjacent image sensor in the circumferential direction. Item 1. The imaging device according to item 1. The plurality of optical systems having the first optical path are three.
The imaging device according to claim 2, wherein the transmission optical element has a hexagonal column shape, and the central axis of the hexagonal column shape is arranged in the housing portion along the reference axis. The imaging device according to claim 3, wherein the three peripheral lenses and the three imaging sensors corresponding to the three peripheral lenses are arranged alternately along the circumferential direction. The imaging device according to claim 3 or 4, wherein the distance on the optical path from the outer surface of the peripheral lens to the central axis is larger than the distance on the optical path from the central axis to the imaging surface of the optical system. Among the plurality of imaging sensors, the imaging sensors corresponding to each of the optical systems having the first optical path are arranged in the housing portion so that the axial direction of the reference axis is the longitudinal direction of the effective pixel region. The imaging device according to any one of claims 2 to 5. The housing portion has an end face that intersects the reference axis and has an end face.
One of the plurality of optical systems has an end face lens located on the most object side arranged corresponding to the end face and a second optical path intersecting the first optical path inside the transmission optical element. The imaging device according to any one of claims 1 to 6. The imaging device according to claim 7, wherein the incident surface on which the first optical path is incident and the incident surface on which the second optical path is incident are perpendicular to each other. The imaging device according to any one of claims 1 to 8, wherein the transmission optical element has a pair of an incident surface and an exit surface corresponding to each of the plurality of optical systems on a one-to-one basis. The imaging device according to claim 9, wherein each of the above sets has an incident surface and an exit surface facing each other. The imaging device according to claim 9 or 10, wherein a parallel flat plate through which the optical path passes is provided on at least one side of the incident surface and the exit surface of the transmissive optical element. The imaging device according to any one of claims 1 to 11, wherein the refractive index of the transmission optical element is larger than 1.51. Multiple optical systems that image the subject image on each corresponding image sensor,
A common transmission optical element through which each optical path of the plurality of optical systems passes is provided.
At least two of the plurality of optical systems are a peripheral lens located on the most object side, which is arranged along the peripheral surface along the circumferential direction of the reference axis in the housing accommodating the plurality of optical systems. , An imaging optical system having first optical paths intersecting each other inside the transmission optical element. Of the plurality of image sensors, the angle of view in the circumferential direction of the image sensor corresponding to each of the optical systems having the first optical path partially overlaps with the angle of view in the circumferential direction of the adjacent image sensors. The imaging optical system according to claim 13. One of the plurality of optical systems includes an end face lens located on the most object side arranged along an end face intersecting the reference axis of the housing, and the first optical path inside the transmission optical element. The imaging optical system according to claim 13 or 14, which has a second optical path intersecting with.