WO2022209136A1

WO2022209136A1 - Lens device and imaging device

Info

Publication number: WO2022209136A1
Application number: PCT/JP2022/000997
Authority: WO
Inventors: 臣一下津; 哲也藤川; 智大島田; 敏浩青井
Original assignee: 富士フイルム株式会社
Priority date: 2021-03-31
Filing date: 2022-01-13
Publication date: 2022-10-06
Also published as: JPWO2022209136A1

Abstract

This lens device comprises: a focus lens through which light passes; a moving mechanism which moves the focus lens in the optical axis direction; a polarizer displaced to a first position at which a first polarized light component included in the light passes through and a second position at which a second polarized light component included in the light passes through; a displacement mechanism which displaces the polarizer; and a first lock mechanism having a first state in which the movement of the focus lens by the moving mechanism is allowed, and a second state in which the movement of the focus lens by the moving mechanism is restricted.

Description

Lens device and imaging device

The technology of the present disclosure relates to a lens device and an imaging device.

Japanese Patent Application Laid-Open No. 2002-303513 discloses an imaging means for acquiring a plurality of images of an object to be observed with polarized light having different polarization directions, and processing the plurality of images acquired by the imaging means to determine the brightness of the object to be observed. An observation apparatus is disclosed which has an image processing means for creating an image and an image display means for displaying the brightness image of the observed object created by the image processing means.

Japanese Patent Application Laid-Open No. 2016-208136 describes a first surface, a second surface that forms a vertical angle of 60 degrees at one end of the first surface, and a 60 degree angle at the other end of the first surface. and a third surface forming an angle of 60 degrees with respect to the second surface as well. and a second prism that divides the light beams into two light beams and makes the two light beams perpendicularly incident on the first surface; It has a splitting surface that passes through the intersection of the first surface and the third surface and is perpendicular to the second surface. 1 internal optical filter and a second internal optical filter for splitting the second light flux into a second straight light and a second reflected light are set, and the first straight light and the second straight light are respectively transmitted through the first prism. After being totally reflected only by the third surface without being totally reflected by the second surface, the first reflected light and the second reflected light are formed into two emitted image lights that are emitted perpendicularly from the second surface. After being totally reflected only by the first surface without being totally reflected in the first prism, the two emitted image lights are vertically emitted from the second surface. A multi-function image acquisition device is disclosed that simultaneously captures and acquires multiple images simultaneously.

Japanese National Publication of International Patent Application No. 2009-226131 discloses a screen provided on the front side of an apparatus main body, and a camera for receiving electromagnetic waves provided on the front side of the apparatus main body and around the screen. A mirror is provided on the surface of the screen, and a polarizing filter or liquid crystal element is placed inside the screen. When the image is projected onto the element and projected onto the screen, and on the other hand, when the camera and the administration device are in the off state, the mirror reflects the light to create a reflection image, and if there is a person in front of the screen, the figure of the human body can be seen. An image display device capable of displaying a reflected image is disclosed.

One embodiment according to the technology of the present disclosure provides a lens device and an imaging device that can limit the movement of the focus lens when displacing the polarizer.

A first aspect of the technology of the present disclosure includes a focus lens that transmits light, a movement mechanism that moves the focus lens in the optical axis direction, a first position that transmits a first polarized component included in light, and light a polarizer displaced to a second position for transmitting a second polarized component included in the polarizer, a displacement mechanism for displacing the polarizer, a first state for allowing movement of the focus lens by the movement mechanism, and a focus lens by the movement mechanism and a first lock mechanism having a second state that restricts movement of the lens.

A second aspect of the technology of the present disclosure is the lens device according to the first aspect, in which the first state and the second state are switched based on the displacement of the polarizer by the displacement mechanism.

A third aspect of the technology of the present disclosure is the lens device according to the first aspect or the second aspect, further comprising a diaphragm through which light passes and a changing mechanism that changes the aperture amount of light by the diaphragm. and a second lock mechanism having a third state that permits change of the aperture amount by the change mechanism and a fourth state that restricts change of the aperture amount by the change mechanism.

A fourth aspect of the technology of the present disclosure is the lens device according to the third aspect, in which the third state and the fourth state are switched based on the displacement of the polarizer by the displacement mechanism.

A fifth aspect of the technology of the present disclosure is the lens device according to the fourth aspect, in which switching between the first state and the second state and switching between the third state and the fourth state are performed in parallel. lens device.

A sixth aspect of the technology of the present disclosure is the lens device according to any one of the first to fifth aspects, wherein the displacement mechanism includes a rotation mechanism that rotates the polarizer around the optical axis direction. lens device.

A seventh aspect of the technology of the present disclosure is the lens device according to any one of the first to fifth aspects, wherein the polarizer includes a first polarizer that transmits a first polarized component; and a second polarizer that transmits two polarized components, and the displacement mechanism includes a slide mechanism that switches between the first polarizer and the second polarizer by sliding the polarizer in a direction crossing the optical axis direction. It is a device.

An eighth aspect of the technology of the present disclosure is the lens device according to any one of the first to seventh aspects, further comprising a lens barrel that supports the moving mechanism and the displacement mechanism, wherein the first state is , the first lock mechanism is a state in which the movement mechanism is released from the lens barrel, and the second state is a lens device in which the first lock mechanism is in a state in which the movement mechanism is fixed to the lens barrel.

A ninth aspect of the technology of the present disclosure is the lens device according to any one of the first to seventh aspects, further comprising a lens barrel that supports the moving mechanism and the displacement mechanism, wherein the first state is , a state in which the first locking mechanism is removed from the lens barrel, and a second state is a state in which the first locking mechanism is attached to the lens barrel.

A tenth aspect of the technology of the present disclosure is the lens device according to any one of the first to seventh aspects, wherein the moving mechanism has a first engaging portion, and the first locking mechanism has and a second engaging portion, the first state being a state in which the first engaging portion is separated from the second engaging portion, and the second state being a state in which the first engaging portion is separated from the second engaging portion. Fig. 4 is a lens device in an engaged state;

An eleventh aspect of the technology of the present disclosure is, in the lens device of the tenth aspect, a sensor that detects the position of the polarizer, and a first and a driving mechanism.

A twelfth aspect of the technology of the present disclosure is the lens device according to the eleventh aspect, further comprising a first processor that controls the first driving mechanism based on the detection result of the sensor.

A thirteenth aspect of the technology of the present disclosure is the lens device according to any one of the first to seventh aspects, wherein a second drive mechanism for driving the first lock mechanism and a second drive mechanism are and a controlling second processor.

A fourteenth aspect of the technology of the present disclosure is the lens device according to the thirteenth aspect, wherein the second processor controls the second drive mechanism to switch the first locking mechanism to the first state in the first mode. and a second mode in which the first lock mechanism controls the second drive mechanism to switch to the second state.

A fifteenth aspect of the technology of the present disclosure is the lens device according to the fourteenth aspect, wherein the second processor switches between the first mode and the second mode based on an external instruction or information obtained from the subject. It is a lens device that switches to

A sixteenth aspect of the technology of the present disclosure is, in the lens device according to any one of the first to fifteenth aspects, a third drive mechanism that drives the displacement mechanism, and a control of the third drive mechanism. and a third processor.

A seventeenth aspect of the technology of the present disclosure is the lens device according to the sixteenth aspect, wherein the third processor causes the image sensor to capture an image of light transmitted through the polarizer when the polarizer is at the first position. and a second image obtained by imaging the light transmitted through the polarizer with the image sensor when the polarizer is at the second position. is a lens device that controls the

An eighteenth aspect of the technology of the present disclosure is the lens device according to any one of the first to seventeenth aspects, further comprising a filter that selectively transmits near-infrared light contained in the light. lens device.

A nineteenth aspect of the technology of the present disclosure is the lens device according to the eighteenth aspect, wherein the filter is integrated with the polarizer.

A twentieth aspect of the technology of the present disclosure is an image pickup including the lens device according to any one of the first to nineteenth aspects, and an image sensor on which light transmitted through the lens device forms an image. It is a device.

BRIEF DESCRIPTION OF THE DRAWINGS It is side sectional drawing which shows an example of the imaging device which concerns on 1st Embodiment. 2 is a block diagram showing an example of an imaging device main body according to the first embodiment; FIG. It is a figure which shows an example of operation|movement of the locking mechanism which concerns on 1st Embodiment. It is a perspective view showing an example of a lens device concerning a 1st embodiment. It is a figure which shows an example of the polarizer which concerns on 1st Embodiment. 5 is a graph showing an example of the relationship between the incident angle and the reflectance for the first polarized component and the second polarized component included in the reflected light; It is a perspective view which shows an example of a to-be-photographed object. It is a figure which shows an example of a 1st near-infrared light image. It is a figure which shows an example of a 2nd near-infrared light image. It is a figure which shows an example of the flow of the usage method of the imaging device which concerns on 1st Embodiment. It is a figure which shows an example of the polarizer which concerns on 2nd Embodiment. It is a figure which shows an example of the polarizer which concerns on 3rd Embodiment. It is a side sectional view showing an example of an imaging device concerning a 4th embodiment. It is a side sectional view showing an example of an imaging device concerning a 5th embodiment. FIG. 12 is a side cross-sectional view showing an example of an imaging device according to a sixth embodiment; It is a figure which shows an example of the turret filter which concerns on 6th Embodiment. It is a figure which shows an example of the lens apparatus which concerns on 7th Embodiment. FIG. 12 is a cross-sectional view of the lens device according to the seventh embodiment at the position of the first ring; FIG. 14 is a cross-sectional view of the lens device according to the seventh embodiment at the position of the second ring; It is a figure which shows an example of the lens apparatus which concerns on 8th Embodiment. FIG. 20 is a cross-sectional view at the position of the first ring of the lens device according to the eighth embodiment; FIG. 21 is a cross-sectional view at the position of the second ring of the lens device according to the eighth embodiment; It is a figure which shows an example of the lens apparatus which concerns on 9th Embodiment. It is a figure which shows an example of the lens apparatus which concerns on 10th Embodiment. FIG. 21 is a cross-sectional view at the position of the third ring of the lens device according to the tenth embodiment; FIG. 22 is a block diagram showing an example of an imaging device according to an eleventh embodiment; FIG. FIG. 21 is a block diagram showing an example of a functional configuration of a CPU according to an eleventh embodiment; FIG. FIG. 22 is a flow chart showing an example of the operation of the CPU according to the eleventh embodiment; FIG. FIG. 22 is a block diagram showing an example of an imaging device according to a twelfth embodiment; FIG. FIG. 22 is a flow chart showing an example of the operation of a CPU according to the twelfth embodiment; FIG.

An example of a lens device and an imaging device according to the technology of the present disclosure will be described below with reference to the accompanying drawings.

First, the wording used in the following explanation will be explained.

　CPU is an abbreviation for "Central Processing Unit". GPU is an abbreviation for "Graphics Processing Unit". NVM is an abbreviation for "Non-Volatile Memory". RAM is an abbreviation for "Random Access Memory". IC is an abbreviation for "Integrated Circuit". ASIC is an abbreviation for "Application Specific Integrated Circuit". PLD is an abbreviation for "Programmable Logic Device". FPGA is an abbreviation for "Field-Programmable Gate Array". SoC is an abbreviation for "System-on-a-chip." SSD is an abbreviation for "Solid State Drive". HDD is an abbreviation for "Hard Disk Drive". EEPROM is an abbreviation for "Electrically Erasable and Programmable Read Only Memory". SRAM is an abbreviation for "Static Random Access Memory". I/F is an abbreviation for "Interface". USB is an abbreviation for "Universal Serial Bus". CMOS is an abbreviation for "Complementary Metal Oxide Semiconductor". CCD is an abbreviation for "Charge Coupled Device". LAN is an abbreviation for "Local Area Network". WAN is an abbreviation for "Wide Area Network". BPF is an abbreviation for "Band Pass Filter". Ir is an abbreviation for "Infrared Rays". EL is an abbreviation for "Electro Luminescence".

In the description of this specification, "perpendicular" means an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, in addition to perfect verticality, and does not go against the spirit of the technology of the present disclosure. It refers to the vertical in the sense of including the error of In the description of this specification, "horizontal" means an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, in addition to being completely horizontal, and is not contrary to the spirit of the technology of the present disclosure. It refers to the horizontal in the sense of including the error of In the description of this specification, "parallel" means, in addition to complete parallelism, an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, and does not go against the spirit of the technology of the present disclosure. It refers to parallel in the sense of including the error of In the description of this specification, "orthogonal" is an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, in addition to perfect orthogonality, and is not contrary to the spirit of the technology of the present disclosure. It refers to orthogonality in the sense of including the error of In the description of this specification, "match" means, in addition to perfect match, an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, and does not go against the spirit of the technology of the present disclosure. It refers to a match in terms of meaning including errors in In the description of this specification, the term “equidistant interval” means an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, in addition to perfectly equal intervals, and is contrary to the spirit of the technology of the present disclosure. It refers to equal intervals in the sense of including errors to the extent that they do not occur.

[First embodiment]
As shown in FIG. 1 as an example, the imaging device 10 includes an imaging device body 12 and a lens device 14 . The lens device 14 is provided on the front surface of the imaging device main body 12 . The lens device 14 may be a fixed lens device fixed to the imaging device body 12 or an interchangeable lens device removable from the imaging device body 12 .

The imaging device main body 12 has an image sensor 16 . The image sensor 16 has a light receiving surface 16A. Light transmitted through the lens device 14 forms an image on the light receiving surface 16A. A plurality of photodiodes (not shown) are arranged in a matrix on the light receiving surface 16A.

As an example, the plurality of photodiodes includes a plurality of silicon photodiodes sensitive to visible light and a plurality of indium-gallium-arsenide photodiodes sensitive to near-infrared light. Hereinafter, the silicon photodiode will be referred to as a Si diode, and the indium-gallium-arsenide photodiode will be referred to as an InGaAs diode. A plurality of Si diodes generate and output analog image data according to the received visible light. A plurality of InGaAs diodes generate and output analog image data corresponding to the received near-infrared light.

In the first embodiment, a CMOS image sensor is exemplified as the image sensor 16, but the technology of the present disclosure is not limited to this. The technology of the present disclosure is also established.

As shown in FIG. 2 as an example, the imaging device body 12 includes a control circuit 20, a display 22, a reception device 24, and an external I/F 26. The control circuit 20 includes an image sensor driver 28 , signal processing circuitry 30 , display control circuitry 32 , acceptance circuitry 34 and computer 36 . Image sensor driver 28 , signal processing circuit 30 , display control circuit 32 , reception circuit 34 , and external I/F 26 are connected to computer 36 via input/output I/F 38 .

The computer 36 includes a CPU 42, NVM 44, and RAM 46. CPU 42 , NVM 44 and RAM 46 are interconnected via bus 48 . Bus 48 is connected to input/output I/F 38 .

The NVM 44 is a non-temporary storage medium and stores various parameters and various programs. For example, NVM 44 is an EEPROM. However, this is merely an example, and an HDD and/or an SSD may be applied as the NVM 44 instead of or together with the EEPROM. The RAM 46 temporarily stores various information and is used as a work memory. The CPU 42 reads necessary programs from the NVM 44 and executes the read programs on the RAM 46 . The CPU 42 controls the entire imaging device 10 according to programs executed on the RAM 46 .

The image sensor driver 28 outputs an imaging timing signal to the image sensor 16 according to instructions from the CPU 42 . The image sensor 16 captures light according to the imaging timing signal. The signal processing circuit 30 performs various signal processing on the analog image data output from the image sensor 16 to generate and output digital image data. The CPU 42 generates image display data based on the digital image data.

The display 22 is, for example, a liquid crystal display or an EL display, and displays images and/or character information. The display control circuit 32 causes the display 22 to display an image based on the image display data.

The reception device 24 is, for example, a device such as a touch panel and/or a switch, and receives instructions given by the user. The reception circuit 34 outputs a reception signal according to the instruction given to the reception device 24 by the user. The external I/F 26 is an interface communicably connected to an external device.

As an example shown in FIG. 1, the lens device 14 includes a lens barrel 52, a focus lens 54, an aperture 56, a filter 60, a polarizer 58, a focus lens moving mechanism 62, an aperture changing mechanism 64, a polarizer rotating mechanism 66, and a A lock mechanism 68 is provided.

The lens barrel 52 is formed in a cylindrical shape. The lens barrel 52 is arranged at a position where the central axis of the lens barrel 52 and the optical axis OA of the lens device 14 coincide. The optical axis OA of the lens device 14 is an axis perpendicular to the light receiving surface 16A and extending from the center of the light receiving surface 16A.

The focus lens 54 and the diaphragm 56 are housed inside the lens barrel 52 . A focus lens moving mechanism 62 and an aperture changing mechanism 64 , which will be described later, are supported by the lens barrel 52 . The focus lens 54 is supported by the lens barrel 52 via a focus lens moving mechanism 62 , and the diaphragm 56 is supported by the lens barrel 52 via a diaphragm changing mechanism 64 .

The focus lens 54 is a lens for adjusting the focus position of the image formed on the light receiving surface 16A of the image sensor 16. The focus lens 54 is arranged at a position where the central axis of the focus lens 54 and the optical axis OA of the lens device 14 coincide. A coating layer that transmits near-infrared light may be formed on the surface of the focus lens 54 .

The diaphragm 56 is an optical element for adjusting the amount of light that passes through the lens device 14. The diaphragm 56 has a plurality of blades 56A, and an opening 56B is formed in the center of the plurality of blades 56A. Light passing through the focus lens 54 passes through the aperture 56B. The diaphragm 56 is a movable diaphragm in which the aperture diameter of an opening 56B is variable by opening and closing a plurality of blades 56A. As an example, the diaphragm 56 is arranged between the focus lens 54 and the image sensor 16 . The diaphragm 56 is arranged at a position where the central axis of the diaphragm 56 and the optical axis OA of the lens device 14 coincide.

Note that the focus lens 54 may be a single lens, or may be a lens group having a plurality of lenses. Also, the lens device 14 may include other lenses in addition to the focus lens 54 . The lens device 14 may also include other optical elements such as a half mirror.

The focus lens moving mechanism 62 is a mechanism for moving the focus lens 54 in a direction parallel to the optical axis OA (hereinafter referred to as "optical axis direction"). The focus lens moving mechanism 62 is an example of a "moving mechanism" according to the technology of the present disclosure. The focus lens moving mechanism 62 includes a first ring 72 , a first guide groove 74 and a first power conversion mechanism 76 . The first ring 72 (see also FIG. 4) is formed in an annular shape. A first uneven portion 78 (see also FIG. 4) is formed on the outer peripheral surface of the first ring 72 . As an example, the first uneven portion 78 is a flat knurl. The first guide groove 74 is formed on the outer peripheral surface of the lens barrel 52 . The first guide groove 74 extends annularly along the circumferential direction of the lens barrel 52 . The first ring 72 is accommodated in the first guide groove 74 . By applying a rotational force to the first ring 72 , the first ring 72 rotates while being guided by the first guide groove 74 . The first ring 72 is bi-directionally rotatable along the circumferential direction of the first guide groove 74 .

The first power conversion mechanism 76 is provided between the first ring 72 and the focus lens 54. The first power conversion mechanism 76 converts the rotational force applied to the first ring 72 into a rectilinear force in the optical axis direction, and applies the rectilinear force to the focus lens 54 . The focus lens 54 is moved in the optical axis direction by applying a linear force to the focus lens 54 . The first power conversion mechanism 76 moves the focus lens 54 toward the image side or the object side in accordance with the rotation direction of the first ring 72 .

The aperture change mechanism 64 is a mechanism for changing the aperture amount of light by the aperture 56 . The aperture change mechanism 64 is an example of a "change mechanism" according to the technology of the present disclosure. The aperture change mechanism 64 includes a second ring 82 , a second guide groove 84 and a second power conversion mechanism 86 . The second ring 82 (see also FIG. 4) is formed in an annular shape. A second uneven portion 88 (see also FIG. 4) is formed on the outer peripheral surface of the second ring 82 . As an example, the second uneven portion 88 is a flat knurl. A second guide groove 84 is formed on the outer peripheral surface of the lens barrel 52 . The second guide groove 84 extends annularly along the circumferential direction of the lens barrel 52 . The second ring 82 is housed in the second guide groove 84 . By applying a rotational force to the second ring 82 , the second ring 82 rotates while being guided by the second guide groove 84 . The second ring 82 is bidirectionally rotatable along the circumferential direction of the second guide groove 84 .

The second power conversion mechanism 86 is provided between the second ring 82 and the throttle 56. The second power conversion mechanism 86 converts the rotational force applied to the second ring 82 into force in the opening/closing direction of the plurality of blades 56A, and applies the force in the opening/closing direction to the plurality of blades 56A. By applying force in the opening/closing direction to the blades 56A, the blades 56A operate in the opening/closing direction. The second power conversion mechanism 86 operates the plurality of blades 56A in the opening direction or the closing direction in accordance with the rotational direction of the second ring 82 . By operating the plurality of blades 56A in the opening direction, the diameter of the opening 56B is enlarged, and by operating the plurality of blades 56A in the closing direction, the diameter of the opening 56B is reduced.

As shown in FIG. 4 as an example, a first boss portion 92 projecting radially outward of the first ring 72 is formed on a part of the first ring 72 in the circumferential direction. Similarly, a part of the second ring 82 in the circumferential direction is formed with a second boss portion 102 projecting radially outward of the second ring 82 .

As shown in FIG. 1 as an example, a first through hole 94 is formed in the first boss portion 92 . The first through hole 94 penetrates the first ring 72 in the radial direction. The lens barrel 52 is formed with an arcuate first long hole 96 extending in the circumferential direction of the lens barrel 52 . The first long hole 96 penetrates the lens barrel 52 in the radial direction. The first long hole 96 is formed at a position communicating with the first through hole 94 . A first housing groove 98 extending in the circumferential direction of the lens barrel 52 is formed in the inner peripheral surface of the lens barrel 52 . The first accommodation groove 98 is located radially inside the barrel 52 with respect to the first guide groove 74 .

A second through hole 104 is formed in the second boss portion 102 . The second through hole 104 penetrates the second ring 82 in the radial direction. The lens barrel 52 is formed with an arc-shaped second long hole 106 extending in the circumferential direction of the lens barrel 52 . The second long hole 106 penetrates the lens barrel 52 in the radial direction. The second elongated hole 106 is formed at a position communicating with the second through hole 104 . A second accommodation groove 108 extending in the circumferential direction of the lens barrel 52 is formed in the inner peripheral surface of the lens barrel 52 . The second housing groove 108 is positioned radially inside the barrel 52 with respect to the second guide groove 84 .

The locking mechanism 68 has a first locking mechanism 112 and a second locking mechanism 114 . The first locking mechanism 112 is provided corresponding to the focus lens moving mechanism 62 , and the second locking mechanism 114 is provided corresponding to the diaphragm changing mechanism 64 .

The first locking mechanism 112 has a first bolt 122 and a first nut 124. A shaft portion 122A of the first bolt 122 is inserted into the first through hole 94 and the first elongated hole 96, and a head portion 122B of the first bolt 122 is in contact with the top surface of the first boss portion 92. . The first nut 124 is housed in the first housing groove 98 . The first nut 124 is formed with a first screw hole 124A penetrating in the axial direction of the first nut 124 . The tip of the shaft portion 122A of the first bolt 122 is screwed into the first screw hole 124A.

As an example, as shown in the upper diagram of FIG. 3, when the first bolt 122 rotates in the tightening direction, the first nut 124 is pressed against the bottom surface of the first housing groove 98 . In this state, the first ring 72 is fixed to the lens barrel 52 and movement of the focus lens 54 by the focus lens moving mechanism 62 is restricted. On the other hand, as shown in the lower diagram of FIG. 3 as an example, when the first bolt 122 rotates in the loosening direction, the first nut 124 is separated from the bottom surface of the first receiving groove 98 . In this state, the fixation of the first ring 72 to the lens barrel 52 is released, and movement of the focus lens 54 by the focus lens moving mechanism 62 is permitted. The state in which the movement of the focus lens 54 is permitted is an example of the “first state” according to the technology of the present disclosure, and the state in which the movement of the focus lens 54 is restricted is the “second state” according to the technology of the present disclosure. is an example of

The second locking mechanism 114 has the same configuration as the first locking mechanism 112. The second locking mechanism 114 has a second bolt 132 and a second nut 134 . A shaft portion 132A of the second bolt 132 is inserted into the second through hole 104 and the second elongated hole 106, and a head portion 132B of the second bolt 132 is in contact with the top surface of the second boss portion 102. . The second nut 134 is housed in the second housing groove 108 . The second nut 134 is formed with a second screw hole 134A penetrating in the axial direction of the second nut 134 . The tip of the shaft portion 132A of the second bolt 132 is screwed into the second screw hole 134A.

As an example, as shown in the upper diagram of FIG. 3 , when the second bolt 132 rotates in the tightening direction, the second nut 134 is pressed against the bottom surface of the second housing groove 108 . In this state, the second ring 82 is fixed to the lens barrel 52, and the change of the aperture amount by the aperture changing mechanism 64 is restricted. On the other hand, as shown in the lower diagram of FIG. 3 as an example, when the second bolt 132 rotates in the loosening direction, the second nut 134 is separated from the bottom surface of the second housing groove 108 . In this state, the fixing of the second ring 82 to the lens barrel 52 is released, and the change of the aperture amount by the aperture change mechanism 64 is permitted. The state in which the change of the aperture amount is permitted is an example of the "third state" according to the technology of the present disclosure, and the state in which the change of the aperture amount is restricted is the "fourth state" according to the technology of the present disclosure. An example.

As shown in FIG. 1 as an example, the polarizer 58 and filter 60 are arranged at the front end of the lens arrangement 14 . The polarizer 58 and filter 60 are supported by the lens barrel 52 via a polarizer rotating mechanism 66, which will be described later. In the example shown in FIG. 1, as an example, the filter 60 is arranged on the object side with respect to the polarizer 58, but may be arranged on the image side with respect to the polarizer 58. FIG. The filter 60 is an optical element having a property of transmitting only near-infrared light contained in light. The filter 60 is arranged at a position where the central axis of the filter 60 and the optical axis OA of the lens device 14 coincide.

Note that the filter 60 may be a turret filter that selectively transmits light in a plurality of wavelength bands (visible light and near-infrared light in different wavelength bands within the near-infrared wavelength band, for example). An example using a turret filter as the filter 60 will be described later in a sixth embodiment.

The polarizer 58 has a transmission axis 58A orthogonal to the central axis of the polarizer 58. The polarizer 58 is an optical element having the property of transmitting only light that oscillates in the direction of the transmission axis 58A and blocking light that oscillates in directions other than the direction of the transmission axis 58A. The polarizer 58 is arranged at a position where the central axis of the polarizer 58 and the optical axis OA of the lens device 14 coincide.

The polarizer rotating mechanism 66 is a mechanism for rotating the polarizer 58 around the optical axis direction. The polarizer rotating mechanism 66 is an example of the “displacement mechanism” and the “rotating mechanism” according to the technology of the present disclosure. The polarizer rotation mechanism 66 includes a third ring 142 and a support ring 144. As shown in FIG. The third ring 142 (see also FIG. 4) is formed in an annular shape. A support ring 144 is formed at the front end of the lens barrel 52 . The support ring 144 extends annularly along the circumferential direction of the lens barrel 52 . The third ring 142 is supported on the outer peripheral surface of the support ring 144 . By applying a rotational force to the third ring 142 , the third ring 142 rotates while being supported by the support ring 144 . The third ring 142 is bi-directionally rotatable along the circumferential direction of the support ring 144 .

A polarizer 58 is fixed to the third ring 142 via a connecting mechanism (not shown). The polarizer 58 rotates together with the third ring 142 . Note that the filter 60 may be integrated with the polarizer 58 . Also, the filter 60 may be fixed to the third ring 142 via a connecting mechanism. The filter 60 may then rotate together with the third ring 142 and the polarizer 58 .

As an example, FIG. 5 shows a case where the rotation angle θ of the polarizer 58 is 0° and a case where the rotation angle θ of the polarizer 58 is 90°. When the rotation angle θ of the polarizer 58 is 0°, the first polarized component contained in the light is transmitted through the polarizer 58. When the rotation angle θ of the polarizer 58 is 90°, the light is The included second polarization component is transmitted through the polarizer 58 . The first polarization component is the polarization component that oscillates in the direction of the transmission axis 58A when the rotation angle θ is 0°, and the second polarization component is the direction of the transmission axis 58A when the rotation angle θ is 90°. is a polarization component with an amplitude of .

When the first polarized component is received by the light receiving surface 16A of the image sensor 16, the image sensor 16 outputs analog image data corresponding to the first polarized component. On the other hand, when the second polarization component is received by the light receiving surface 16A of the image sensor 16, the image sensor 16 outputs analog image data corresponding to the second polarization component. In the imaging device 10, an image is displayed on the display 22 based on the analog image data.

FIG. 5 shows, as an example, a case where the rotation angle θ of the polarizer 58 is 0° and a case where the rotation angle θ of the polarizer 58 is 90°. It is possible to rotate 360° around the optical axis direction. Polarized light component oscillating in the direction of the transmission axis 58A is transmitted through the polarizer 58 regardless of the rotation angle θ of the polarizer 58 . When the polarized component transmitted through the polarizer 58 is received by the light receiving surface 16A of the image sensor 16, the image sensor 16 outputs analog image data corresponding to the polarized component. In the example shown in FIG. 5, the rotational position of the polarizer 58 when the rotation angle θ is 0° is an example of the “first position” according to the technology of the present disclosure, and when the rotation angle θ is 90° is an example of the "second position" according to the technology of the present disclosure. Also, the rotation of the polarizer 58 is an example of "polarizer displacement" according to the technology of the present disclosure.

As an example, FIG. 6 shows an example of the relationship between the incident angle and the reflectance for the first polarized component and the second polarized component when the light is reflected light. The reflectance of the first polarization component is greater than the reflectance of the second polarization component in the range of incident angles greater than 0° and less than 90°. Further, for example, when the incident angle is in the range of 40° to 70°, the reflectance of the second polarized component remains close to 0, but the reflectance of the first polarized component increases as the incident angle increases. growing. Thus, the reflected light has polarization dependence.

An example of the subject 150 is shown in FIG. 7 as an example. A subject 150 has a desk 152 , a stand 154 placed on the desk 152 , and a soldering iron 156 placed on the stand 154 .

As an example, FIG. 8 shows an example of a first near-infrared light image 160 obtained by imaging the subject 150 with the imaging device 10 . For example, the first near-infrared light image 160 is an image when the rotation angle θ of the polarizer 58 is 0°. The first near-infrared light image 160 includes a stereoscopic image 162 , a thermal radiation image 164 and a reflected image 166 .

The stereoscopic image 162 is an image based on the near-infrared light reflected by the subject 150 and the near-infrared light contained in the electromagnetic waves emitted from the subject 150 by thermal radiation. The thermal radiation image 164 is an image based on near-infrared light contained in electromagnetic waves emitted from the desk 152 heated by the tip of the soldering iron 156 by thermal radiation. The reflected image 166 is an image based on the reflected light of the near-infrared light contained in the electromagnetic wave emitted from the tip of the soldering iron 156 by thermal radiation and reflected on the desk 152 .

A reflected image 166 included in the first near-infrared light image 160 is an image based on the first polarization component (see FIG. 6). Therefore, the reflected image 166 included in the first near-infrared light image 160 has higher brightness than the reflected image 166 included in the second near-infrared light image 170 described later. The entity image 162 is an image representing the entity of the subject 150 . The thermal radiation image 164 does not represent the substance of the subject 150, and is an image that appears to shine as a whole. The reflected image 166 represents the substance of the subject 150, but is an enlarged image of the substance. In this way, the first near-infrared light image 160 includes the reflected image 166 in addition to the stereoscopic image 162 and the thermal radiation image 164 . becomes difficult to see.

As an example, FIG. 9 shows an example of a second near-infrared light image 170 obtained by imaging the subject 150 with the imaging device 10 . For example, the second near-infrared light image 170 is an image when the rotation angle θ of the polarizer 58 is 90°. The second near-infrared light image 170 includes a solid image 162 , a thermal radiation image 164 , and a reflected image 166 . A reflected image 166 included in the second near-infrared light image 170 is an image based on the second polarization component (see FIG. 6). Therefore, the reflected image 166 included in the second near-infrared light image 170 has lower luminance than the reflected image 166 included in the first near-infrared light image 160 described above.

Thus, in the imaging device 10 according to the first embodiment, the brightness of the reflected image 166 can be changed by the user rotating the polarizer 58 .

Next, the action of the imaging device 10 according to the first embodiment will be described with reference to FIG. FIG. 10 shows an example of how to use the imaging device 10 according to the first embodiment. Here, as an example, a method of using the imaging device 10 by a firefighter rushing into a fire scene will be described. It should be noted that the method of use of this example starts from a state in which the imaging device 10 is powered on and a live view image is displayed on the display 22 .

In the method of using the imaging device 10 shown in FIG. 10, first, in step S1, the firefighter rotates the first ring 72 while checking the live view image displayed on the display 22 before entering the fire scene. By adjusting the position of the focus lens 54, the focal position is adjusted. At this time, for example, the firefighter sets the focus position at a position 5 m from the imaging device 10 .

At step S2, the firefighter sets the first locking mechanism 112 to the locked state. Thereby, the position of the focus lens 54 is fixed.

In step S3, the firefighter rotates the second ring 82 to adjust the throttle amount of the throttle 56.

At step S4, the firefighter sets the second locking mechanism 114 to the locked state. As a result, the aperture amount of the aperture 56 is fixed.

In step S5, the firefighter rushes into the fire site while checking the live view image displayed on the display 22.

In step S6, the firefighter adjusts the rotation angle of the polarizer 58 to an angle at which the reflected image 166 is suppressed by rotating the third ring 142 while checking the live view image displayed on the display 22. do.

In step S7, the firefighter causes the imaging device 10 to image the fire scene. This provides a near-infrared image of the fire scene.

As described in detail above, in the first embodiment, the imaging device 10 is in the unlocked state in which movement of the focus lens 54 by the focus lens moving mechanism 62 is allowed, and in the state in which movement of the focus lens 54 by the focus lens moving mechanism 62 is restricted. and a first locking mechanism 112 having a locked state. The first locking mechanism 112 is switched between an unlocked state and a locked state based on the rotation of the polarizer 58 by the polarizer rotating mechanism 66 . Therefore, by locking the first locking mechanism 112, the movement of the focus lens 54 can be restricted when the polarizer 58 is rotated.

The imaging device 10 also includes a second lock mechanism 114 that has an unlocked state that allows the aperture change mechanism 64 to change the aperture amount and a locked state that restricts the aperture change mechanism 64 from changing the aperture amount. The second locking mechanism 114 is switched between an unlocked state and a locked state based on the rotation of the polarizer 58 by the polarizer rotating mechanism 66 . Therefore, by locking the second locking mechanism 114, when the polarizer 58 is rotated, the change of the aperture amount can be restricted.

Also, the polarizer rotating mechanism 66 includes a rotating mechanism that rotates the polarizer 58 around the optical axis direction. Therefore, by rotating the polarizer 58 with the polarizer rotating mechanism 66, the polarization component transmitted through the polarizer 58 can be changed. In addition, by changing the polarized component transmitted through the polarizer 58, the brightness of the reflected image 166 displayed on the display 22 can be increased or decreased. Further, by fixing the position of the polarizer 58 at a position where the brightness of the reflected image 166 is weakened, it is possible to suppress the appearance of the reflected image 166 in the image displayed on the display 22 .

Also, the polarizer rotating mechanism 66 rotates the polarizer 58 by 360° around the optical axis direction. Therefore, the brightness of the reflected image 166 displayed on the display 22 can be increased or decreased by rotating the polarizer 58 by 360 degrees. Also, the number of reflected images 166 can be determined by ascertaining that the brightness of the reflected images 166 increases or decreases.

Further, the unlocked state of the first locking mechanism 112 is a state in which the first locking mechanism 112 releases the fixation of the focus lens moving mechanism 62 to the lens barrel 52, and the locked state of the first locking mechanism 112 is the first locking state. The lock mechanism 112 is in a state in which the focus lens moving mechanism 62 is fixed to the lens barrel 52 . Therefore, by switching the first lock mechanism 112 between the unlocked state and the locked state, a state in which movement of the focus lens 54 by the focus lens moving mechanism 62 is permitted and a state in which the focus lens 54 is allowed to move by the focus lens moving mechanism 62 are changed. You can switch to and from restricted states.

Similarly, the unlocked state of the second locking mechanism 114 is a state in which the second locking mechanism 114 has released the aperture change mechanism 64 from the lens barrel 52, and the locked state of the second locking mechanism 114 is the second The lock mechanism 114 is in a state in which the diaphragm change mechanism 64 is fixed to the lens barrel 52 . Therefore, by switching the second lock mechanism 114 between the unlocked state and the locked state, a state in which change of the aperture amount by the aperture change mechanism 64 is permitted and a state in which change in the aperture amount by the aperture change mechanism 64 is restricted. can be switched to

Also, as an example, the filter 60 is integrated with the polarizer 58 . Therefore, for example, compared with the case where the filter 60 is separate from the polarizer 58, the number of parts can be reduced.

[Second embodiment]
As an example, as shown in FIG. 11, in the second embodiment, the rotation range of the polarizer 58 is set in the range of 0° to 90°, as compared with the first embodiment. For example, the support ring 144 and/or the third ring 142 (see FIG. 1) are provided with a limiting mechanism that limits the rotation angle of the third ring 142, so that the rotation range of the polarizer 58 is from 0° to 90°. is set to In the second embodiment, the rotation angle θ of the polarizer 58 can be switched between 0° and 90°. Although the upper limit of the rotation angle θ of the polarizer 58 is set to 90° in the second embodiment, it may be set to a value other than 90°.

[Third Embodiment]
As an example, as shown in FIG. 12, in the third embodiment, a polarizer slide mechanism 180 is used instead of the polarizer rotation mechanism 66 (see FIG. 1) according to the first embodiment. The polarizer slide mechanism 180 is an example of a “displacement mechanism” and a “slide mechanism” according to the technology of the present disclosure. The polarizer slide mechanism 180 is a mechanism for sliding the polarizer 58 in a direction crossing the optical axis direction. The direction intersecting the optical axis direction may be any direction as long as it intersects the optical axis direction.

The polarizer slide mechanism 180 includes a slide member 182 and guide grooves 184 . The slide member 182 is formed in a plate shape. The slide member 182 is arranged with the optical axis direction as the plate thickness direction. The guide groove 184 is formed at the front end of the lens barrel 52 (see FIG. 1). The guide groove 184 extends linearly along a direction crossing the optical axis direction. Hereinafter, the direction in which the guide groove 184 extends will be referred to as the guide direction. The slide member 182 slides in the guide direction by being supported by the guide groove 184 . By applying a sliding force to the slide member 182 , the slide member 182 slides while being supported by the guide grooves 184 . The slide member 182 is bidirectionally slidable along the guide direction.

The polarizer 58 has a first polarizer 186 and a second polarizer 188 . The first polarizer 186 and the second polarizer 188 are arranged side by side in the guide direction. The first polarizer 186 has a first transmission axis 186A orthogonal to the central axis of the first polarizer 186. As shown in FIG. As an example, the first transmission axis 186A extends along a direction orthogonal to the guide direction when viewed from the optical axis direction. The first polarizer 186 is an optical element having a property of transmitting only light that oscillates in the direction of the first transmission axis 186A and blocking light that oscillates in directions other than the direction of the first transmission axis 186A.

The second polarizer 188 has a second transmission axis 188A perpendicular to the central axis of the second polarizer 188. As an example, the second transmission axis 188A extends along the guide direction when viewed from the optical axis direction. The second polarizer 188 is an optical element having a property of transmitting only light that oscillates in the direction of the second transmission axis 188A and blocking light that oscillates in directions other than the direction of the second transmission axis 188A. By sliding the slide member 182 , the polarizer inserted into the optical path on the optical axis OA is switched between the first polarizer 186 and the second polarizer 188 . The sliding of the polarizer 58 is an example of "polarizer displacement" according to the technology of the present disclosure.

In the third embodiment, the polarizer 58 has a first polarizer 186 that transmits the first polarization component and a second polarizer 188 that transmits the second polarization component, and the polarizer slide mechanism 180 has a polarization The first polarizer 186 and the second polarizer 188 are switched by sliding the polarizer 58 in a direction crossing the optical axis direction. Therefore, by sliding the polarizer 58 by the polarizer slide mechanism 180, the polarization component transmitted through the polarizer 58 can be changed. In addition, by changing the polarized component transmitted through the polarizer 58, the brightness of the reflected image 166 displayed on the display 22 can be increased or decreased. Further, by fixing the position of the polarizer 58 at a position where the brightness of the reflected image 166 is weakened, it is possible to suppress the appearance of the reflected image 166 in the image displayed on the display 22 .

In the third embodiment, the polarizer slide mechanism 180 is used to slide the polarizer 58 in the direction crossing the optical axis direction. A polarizer rotation mechanism for rotating 58 around the optical axis direction may be used. Then, the first polarizer 186 and the second polarizer 188 may be switched by rotating the polarizer 58 around the optical axis direction.

Further, in the third embodiment, the polarizer 58 has two polarizers, the first polarizer 186 and the second polarizer 188, but may have three or more polarizers with different transmission axes. good.

[Fourth Embodiment]
As an example, as shown in FIG. 13, in the fourth embodiment, the position of the polarizer 58 is changed with respect to the first embodiment. That is, the polarizer 58 is arranged on the object side with respect to the filter 60 . Polarizer 58 is separate from filter 60 . The filter 60 is fixed with respect to the lens barrel 52 and the polarizer 58 rotates integrally with the third ring 142 . Even with such a configuration, the same effects as in the first embodiment can be obtained.

[Fifth embodiment]
As shown in FIG. 14 as an example, in the fifth embodiment, the position of the filter 60 is changed with respect to the first embodiment. That is, the filter 60 is housed inside the lens barrel 52 . As an example, filter 60 is positioned between aperture 56 and image sensor 16 . Note that the filter 60 may be arranged at any position. For example, the filter 60 may be arranged on the subject side with respect to the focus lens 54 or may be arranged between the focus lens 54 and the diaphragm 56 . Even with such a configuration, the same effects as in the first embodiment can be obtained.

[Sixth Embodiment]
As an example, as shown in FIG. 15, in the sixth embodiment, a turret filter 190 is used instead of the filter 60 (see FIG. 1) according to the first embodiment. As will be described in detail later, the turret filter 190 selects light in a plurality of wavelength bands included in the light (for example, visible light and near-infrared light in different wavelength bands within the near-infrared wavelength band). It is a transparent rotating filter. The turret filter 190 is housed inside the barrel 52 . As an example, turret filter 190 is positioned between diaphragm 56 and image sensor 16 . Note that the turret filter 190 may be arranged at any position. For example, the turret filter 190 may be arranged on the object side with respect to the focus lens 54 or may be arranged between the focus lens 54 and the diaphragm 56 . The turret filter 190 is an example of "a filter that selectively transmits near-infrared light contained in light" according to the technology of the present disclosure.

Also, in the sixth embodiment, the polarizer 58 is housed inside the lens barrel 52 . As an example, the polarizer 58 is arranged on the object side with respect to the focus lens 54 . Note that the polarizer 58 may be arranged at any position. For example, polarizer 58 may be positioned between focus lens 54 and diaphragm 56 and between diaphragm 56 and turret filter 190 . Polarizer 58 may also be placed between turret filter 190 and image sensor 16 .

Also, in the sixth embodiment, a polarizer rotating mechanism 200 and a turret filter rotating mechanism 210 are used.

The polarizer rotating mechanism 200 is a mechanism for rotating the polarizer 58 around the optical axis direction. The polarizer rotating mechanism 200 is an example of the “displacement mechanism” and the “rotating mechanism” according to the technology of the present disclosure. The polarizer rotating mechanism 200 has a third ring 202 , a third guide groove 204 and a power transmission mechanism 206 . The third ring 202 is formed in an annular shape. A third guide groove 204 is formed on the outer peripheral surface of the lens barrel 52 . The third guide groove 204 extends annularly along the circumferential direction of the lens barrel 52 . The third ring 202 is accommodated in the third guide groove 204 . By applying a rotational force to the third ring 202 , the third ring 202 rotates while being guided by the third guide groove 204 . The third ring 202 is bi-directionally rotatable along the circumferential direction of the third guide groove 204 .

A power transmission mechanism 206 is provided between the third ring 202 and the polarizer 58 . The power transmission mechanism 206 transmits the rotational force applied to the third ring 202 to the polarizer 58 . The polarizer 58 is rotated by transmitting a rotational force to the polarizer 58 . The power transmission mechanism 206 rotates the polarizer 58 in a direction corresponding to the direction of rotation of the third ring 202 .

The turret filter rotating mechanism 210 is a mechanism for rotating the turret filter 190 around the optical axis direction. The turret filter rotation mechanism 210 has a fourth ring 212 , a fourth guide groove 214 and a power transmission mechanism 216 . The fourth ring 212 is formed in an annular shape. A fourth guide groove 214 is formed on the outer peripheral surface of the lens barrel 52 . The fourth guide groove 214 extends annularly along the circumferential direction of the lens barrel 52 . The fourth ring 212 is housed in the fourth guide groove 214 . By applying a rotational force to the fourth ring 212 , the fourth ring 212 rotates while being guided by the fourth guide groove 214 . The fourth ring 212 is bidirectionally rotatable along the circumferential direction of the fourth guide groove 214 .

The power transmission mechanism 216 is provided between the fourth ring 212 and the turret filter 190. The power transmission mechanism 216 transmits the rotational force applied to the fourth ring 212 to the turret filter 190 . The turret filter 190 is rotated by transmitting a rotational force to the turret filter 190 . The power transmission mechanism 216 rotates the turret filter 190 in a direction corresponding to the rotational direction of the fourth ring 212 .

A part of the third ring 202 in the circumferential direction is formed with a third boss portion 222 that protrudes radially outward from the third ring 202 . A third through hole 224 is formed in the third boss portion 222 . The third through hole 224 penetrates the third ring 202 in the radial direction. The lens barrel 52 is formed with an arcuate third long hole 226 extending in the circumferential direction of the lens barrel 52 . The third long hole 226 penetrates the lens barrel 52 in the radial direction. The third long hole 226 is formed at a position communicating with the third through hole 224 . A third housing groove 228 extending in the circumferential direction of the lens barrel 52 is formed in the inner peripheral surface of the lens barrel 52 .

Similarly, a fourth boss portion 232 projecting radially outward of the fourth ring 212 is formed on a portion of the fourth ring 212 in the circumferential direction. A fourth through hole 234 is formed in the fourth boss portion 232 . The fourth through hole 234 penetrates the fourth ring 212 in the radial direction. The lens barrel 52 is formed with an arcuate fourth long hole 236 extending in the circumferential direction of the lens barrel 52 . The fourth long hole 236 penetrates the lens barrel 52 in the radial direction. The fourth long hole 236 is formed at a position communicating with the fourth through hole 234 . A fourth housing groove 238 extending in the circumferential direction of the lens barrel 52 is formed in the inner peripheral surface of the lens barrel 52 .

Also, in the sixth embodiment, the lock mechanism 68 includes a third lock mechanism 242 and a fourth lock mechanism 244 in addition to the first lock mechanism 112 and the second lock mechanism 114 . A third locking mechanism 242 is provided corresponding to the polarizer rotating mechanism 200 , and a fourth locking mechanism 244 is provided corresponding to the turret filter rotating mechanism 210 . The third locking mechanism 242 and the fourth locking mechanism 244 have the same configuration as the first locking mechanism 112 and the second locking mechanism 114, respectively.

The third locking mechanism 242 has a third bolt 252 and a third nut 254. A shaft portion 252A of the third bolt 252 is inserted into the third through hole 224 and the third elongated hole 226, and a head portion 252B of the third bolt 252 is in contact with the top surface of the third boss portion 222. . The third nut 254 is housed in the third housing groove 228 . The third nut 254 is formed with a third screw hole 254A penetrating through the third nut 254 in the axial direction. The tip of the shaft portion 252A of the third bolt 252 is screwed into the third screw hole 254A.

When the third bolt 252 rotates in the tightening direction, the third nut 254 is pressed against the bottom surface of the third housing groove 228 . In this state, the third ring 142 is fixed with respect to the lens barrel 52 and the rotation of the polarizer 58 by the polarizer rotating mechanism 66 is restricted. On the other hand, when the third bolt 252 rotates in the loosening direction, the third nut 254 is separated from the bottom surface of the third receiving groove 228 . In this state, the fixing of the third ring 142 to the lens barrel 52 is released, and the rotation of the polarizer 58 by the polarizer rotating mechanism 66 is allowed. The state in which the rotation of the polarizer 58 is permitted is an example of the “first state” and the “third state” according to the technology of the present disclosure, and the state in which the rotation of the polarizer 58 is restricted is the state of the technology of the present disclosure. It is an example of the "second state" and the "fourth state".

The fourth locking mechanism 244 has a fourth bolt 262 and a fourth nut 264. A shaft portion 262A of the fourth bolt 262 is inserted into the fourth through hole 234 and the fourth elongated hole 236, and a head portion 262B of the fourth bolt 262 is in contact with the top surface of the fourth boss portion 232. . The fourth nut 264 is housed in the fourth housing groove 238 . The fourth nut 264 is formed with a fourth screw hole 264A penetrating in the axial direction of the fourth nut 264 . The tip of the shaft portion 262A of the fourth bolt 262 is screwed into the fourth screw hole 264A.

When the fourth bolt 262 rotates in the tightening direction, the fourth nut 264 is pressed against the bottom surface of the fourth housing groove 238 . In this state, the fourth ring 212 is fixed to the lens barrel 52, and the rotation of the turret filter 190 by the turret filter rotation mechanism 210 is restricted. On the other hand, when the fourth bolt 262 rotates in the loosening direction, the fourth nut 264 is separated from the bottom surface of the fourth housing groove 238 . In this state, the fixing of the fourth ring 212 to the lens barrel 52 is released, and the rotation of the turret filter 190 by the turret filter rotation mechanism 210 is permitted. The state in which the turret filter 190 is permitted to rotate is an example of the “first state” and the “third state” according to the technology of the present disclosure, and the state in which the rotation of the turret filter 190 is restricted is the state of the technology of the present disclosure. It is an example of the "second state" and the "fourth state".

As shown in FIG. 16 as an example, the turret filter 190 has a disc 192 . The disk 192 is provided with an Ir cut filter 194, a first BPF 196A, a second BPF 196B, a third BPF 196C, and a fourth BPF 196D as a plurality of optical filters at equal intervals along the circumferential direction of the disk 192. Hereinafter, the Ir cut filter 194, the first BPF 196A, the second BPF 196B, the third BPF 196C, and the fourth BPF 196D are referred to as optical filters unless they need to be distinguished and described. Further, hereinafter, the first BPF 196A, the second BPF 196B, the third BPF 196C, and the fourth BPF 196D will be referred to as BPFs 196 unless they need to be distinguished and described.

The turret filter 190 selectively inserts and removes a plurality of optical filters with respect to the optical path in a turret method. Specifically, the Ir cut filter 194, the first BPF 196A, the second BPF 196B, the third BPF 196C, and the fourth BPF 196D are selectively inserted into the optical path by rotating the turret filter 190 in the direction of the arc arrow R shown in FIG. be taken off. When the optical filter is inserted into the optical path, the optical axis OA passes through the center of the optical filter, and the center of the optical filter inserted into the optical path coincides with the center of the light receiving surface 16A of the image sensor 16. FIG.

The Ir cut filter 194 is an optical filter that cuts infrared rays and transmits only light other than infrared rays. BPF 196 is an optical filter that transmits near-infrared light. The first BPF 196A, the second BPF 196B, the third BPF 196C, and the fourth BPF 196D transmit near-infrared light in different wavelength bands.

The first BPF 196A is an optical filter that corresponds to a wavelength band near 1000 nm (nanometers). As an example, the first BPF 196A transmits only near-infrared light in the wavelength band from 950 nm to 1100 nm. The near-infrared light transmitted through the first BPF 196A is hereinafter referred to as first near-infrared light.

The second BPF 196B is an optical filter corresponding to a wavelength band near 1250 nm. As an example, the second BPF 196B transmits only near-infrared light in the wavelength band from 1150 nm to 1350 nm. The near-infrared light transmitted through the second BPF 196B is hereinafter referred to as second near-infrared light.

The third BPF 196C is an optical filter corresponding to a wavelength band near 1550 nm. As an example, the third BPF 196C transmits only near-infrared light in the wavelength band from 1500 nm to 1750 nm. The near-infrared light transmitted through the third BPF 196C is hereinafter referred to as third near-infrared light.

The fourth BPF 196D is an optical filter corresponding to a wavelength band near 2150 nm. As an example, the fourth BPF 196D transmits only near-infrared light in the wavelength band from 2000 nm to 2400 nm. The near-infrared light transmitted through the fourth BPF 196D is hereinafter referred to as fourth near-infrared light.

Hereinafter, the first near-infrared light, the second near-infrared light, the third near-infrared light, and the fourth near-infrared light are referred to as near-infrared light unless it is necessary to distinguish them. Note that each band mentioned here includes an error that is generally allowed in the technical field to which the technology of the present disclosure belongs and that does not deviate from the gist of the technology of the present disclosure. Further, each wavelength band mentioned here is merely an example, and different wavelength bands may be used.

When the Ir cut filter 194 is inserted into the optical path and the visible light transmitted through the Ir cut filter 194 is imaged on the light receiving surface 16A of the image sensor 16, the plurality of Si diodes arranged on the light receiving surface 16A transmit the received visible light. It outputs analog image data obtained by capturing light. This realizes a function of obtaining a visible light image by imaging visible light. Further, when the BPF 196 is inserted into the optical path and the near-infrared light transmitted through the BPF 196 is imaged on the light receiving surface 16A of the image sensor 16, a plurality of InGaAs diodes arranged on the light receiving surface 16A receive the near-infrared light. and outputs analog image data obtained by imaging the . This realizes a function of obtaining a near-infrared light image by capturing near-infrared light.

In the sixth embodiment, the imaging device 10 has an unlocked state that allows rotation of the polarizer 58 by the polarizer rotating mechanism 200 and a locked state that restricts rotation of the polarizer 58 by the polarizer rotating mechanism 200. 3 lock mechanism 242 is provided. Therefore, the third locking mechanism 242 can fix the position of the polarizer 58 .

Further, the imaging apparatus 10 has a fourth lock mechanism 244 having an unlocked state in which rotation of the turret filter 190 by the turret filter rotation mechanism 210 is permitted and a locked state in which rotation of the turret filter 190 by the turret filter rotation mechanism 210 is restricted. Prepare. Therefore, the fourth lock mechanism 244 can fix the position of the turret filter 190 .

In addition, the imaging device 10 further includes a turret filter 190 that selectively transmits near-infrared light contained in the light. Therefore, by selecting near-infrared light that passes through the turret filter 190, a near-infrared light image corresponding to the wavelength band of the near-infrared light can be displayed on the display 22. FIG.

[Seventh Embodiment]
As an example, as shown in FIG. 17, in the seventh embodiment, a lock cover 270 is used instead of the lock mechanism 68 (see FIG. 1) according to the first embodiment. The lock cover 270 is an example of the "first lock mechanism" according to the technology of the present disclosure. As an example, the lock cover 270 is an arcuate plate material with a central angle of greater than 180°. Lock cover 270 has flexibility. The axial length of the lock cover 270 is set so that the lock cover 270 covers the first ring 72 and the second ring 82 when the lock cover 270 is attached to the outer peripheral surface of the lens barrel 52 . An uneven portion 272 is formed on the inner peripheral surface of the lock cover 270 . As an example, the uneven portion 272 is a flat knurl. The uneven portion 272 engages with the first uneven portion 78 formed on the outer peripheral surface of the first ring 72 and the second uneven portion 88 formed on the outer peripheral surface of the second ring 82 . The first uneven portion 78 and the second uneven portion 88 are examples of the “first engaging portion” according to the technology of the present disclosure, and the uneven portion 272 is the “second engaging portion” of the technology of the present disclosure. An example.

As an example, as shown in FIGS. 18 and 19, when the lock cover 270 is attached to the outer peripheral surface of the lens barrel 52, the concave-convex portion 272 is engaged with the first concave-convex portion 78 and the second concave-convex portion 88. . In this state, the first ring 72 and the second ring 82 are fixed to the lens barrel 52, and movement of the focus lens 54 by the focus lens moving mechanism 62 and change of the aperture amount by the aperture change mechanism 64 are restricted. On the other hand, when the lock cover 270 is removed from the outer peripheral surface of the lens barrel 52 , the concave-convex portion 272 is separated from the first concave-convex portion 78 and the second concave-convex portion 88 . In this state, the fixing of the first ring 72 to the lens barrel 52 and the fixing of the second ring 82 to the lens barrel 52 are released. changes are allowed. The state in which the lock cover 270 is removed from the outer peripheral surface of the lens barrel 52 is an example of the “first state” according to the technology of the present disclosure, and the state in which the lock cover 270 is attached to the outer peripheral surface of the lens barrel 52 is It is an example of the "second state" according to the technology of the present disclosure.

In the seventh embodiment, the imaging device 10 has a lock cover 270 . When the lock cover 270 is removed from the lens barrel 52 , it is in an unlocked state that allows the focus lens 54 to be moved by the focus lens moving mechanism 62 . On the other hand, when the lock cover 270 is attached to the lens barrel 52 , the lock cover 270 is in a locked state that restricts the movement of the focus lens 54 by the focus lens moving mechanism 62 . Therefore, by switching the lock cover 270 between a state in which the lock cover 270 is removed from the lens barrel 52 and a state in which it is attached to the lens barrel 52, a state in which the focus lens 54 is allowed to move by the focus lens moving mechanism 62 and a state in which the focus lens moving mechanism 62 is allowed to move. , the movement of the focus lens 54 is restricted by .

Further, when the lock cover 270 is removed from the lens barrel 52, it is in an unlocked state that allows the aperture change mechanism 64 to change the aperture amount. On the other hand, when the lock cover 270 is attached to the lens barrel 52, the lock cover 270 is in a locked state that limits the change of the aperture amount by the aperture change mechanism 64. As shown in FIG. Therefore, by switching the lock cover 270 between the state in which the lock cover 270 is removed from the lens barrel 52 and the state in which it is attached to the lens barrel 52, the state in which the aperture change mechanism 64 is permitted to change the aperture amount and the aperture amount by the aperture change mechanism 64 are allowed. can be switched to a state in which changes to the

Switching between an unlocked state that allows movement of the focus lens 54 and a locked state that restricts movement of the focus lens 54; are switched in parallel. Therefore, for example, switching between an unlocked state that permits movement of the focus lens 54 and a locked state that restricts movement of the focus lens 54, an unlocked state that permits change in the aperture amount, and a locked state that restricts change in the aperture amount. The operability of the lens device 14 is improved as compared with the case where the state is switched independently.

It should be noted that the first ring 72 and the second ring 82 may each have a first engaging portion, which is a concave portion or a convex portion other than the flat knurl, instead of the first concave-convex portion 78 and the second concave-convex portion 88. good. Further, the lock cover 270 may have a second engaging portion, which is a convex portion or concave portion other than the flat knurl, instead of the uneven portion 272 .

[Eighth Embodiment]
As an example, as shown in FIG. 20, in the eighth embodiment, a lock mechanism 280 is used instead of the lock mechanism 68 (see FIG. 1) according to the first embodiment. The lock mechanism 280 is provided on the rear end side of the lens barrel 52 relative to the first ring 72 and the second ring 82 . As an example, the lock mechanism 280 has a lock member 282 and guide grooves 284 . The guide groove 284 is formed along the axial direction of the lens barrel 52 . The locking member 282 slides in the axial direction of the lens barrel 52 by being supported by the guide groove 284 . The lock member 282 has an unlocked position (see the left diagram of FIG. 20) in which the lock member 282 is retracted from the first ring 72 and the second ring 82, and a locked position (see the right diagram of FIG. 20) in which the first ring 72 and the second ring 82 overlap. ). The lock mechanism 280 is an example of the "first lock mechanism" and the "second lock mechanism" according to the technology of the present disclosure.

As an example, as shown in FIGS. 21 and 22, an uneven portion 286 is formed on the inner surface of the locking member 282 (that is, the surface facing the outer peripheral surface of the lens barrel 52). As an example, the uneven portion 286 is a flat knurl. The uneven portion 286 engages with the first uneven portion 78 formed on the outer peripheral surface of the first ring 72 and the second uneven portion 88 formed on the outer peripheral surface of the second ring 82 . The first uneven portion 78 and the second uneven portion 88 are examples of the “first engaging portion” according to the technology of the present disclosure, and the uneven portion 286 is the “second engaging portion” according to the technology of the present disclosure. An example.

As an example, as shown in FIGS. 21 and 22 , when the lock member 282 slides to the locked position, the concave-convex portion 286 engages with the first concave-convex portion 78 and the second concave-convex portion 88 . In this state, the first ring 72 and the second ring 82 are fixed to the lens barrel 52, and movement of the focus lens 54 by the focus lens moving mechanism 62 and change of the aperture amount by the aperture change mechanism 64 are restricted. On the other hand, when the lock member 282 slides to the unlocked position, the concave-convex portion 286 is separated from the first concave-convex portion 78 and the second concave-convex portion 88 . In this state, the fixing of the first ring 72 to the lens barrel 52 and the fixing of the second ring 82 to the lens barrel 52 are released. changes are allowed. The state in which the lock member 282 is slid to the unlocked position is an example of the "first state" according to the technology of the present disclosure, and the state in which the lock member 282 is slid to the lock position is the "second state" according to the technology of the present disclosure. It is an example of "state".

In the eighth embodiment, the imaging device 10 includes a lock mechanism 280 having a lock member 282 and a guide groove 284. When the lock member 282 is slid to the unlocked position, it is in an unlocked state that allows the focus lens 54 to be moved by the focus lens moving mechanism 62 . On the other hand, when the lock member 282 is slid to the lock position, the lock member 282 is in a locked state in which movement of the focus lens 54 by the focus lens moving mechanism 62 is restricted. Therefore, by switching the lock member 282 between the unlocked position and the locked position, the movement of the focus lens 54 by the focus lens moving mechanism 62 is allowed and the movement of the focus lens 54 by the focus lens moving mechanism 62 is restricted. can be switched to and from

Similarly, when the lock member 282 is slid to the unlocked position, it is in an unlocked state that allows the aperture change mechanism 64 to change the aperture amount. On the other hand, when the lock member 282 is slid to the lock position, the lock member 282 is in a locked state in which the change of the aperture amount by the aperture change mechanism 64 is restricted. Therefore, by switching the lock member 282 between the unlocked position and the locked position, a state in which the change of the aperture amount by the aperture change mechanism 64 is permitted and a state in which the change in the aperture amount by the aperture change mechanism 64 is restricted. You can switch.

Note that it is also possible to slide the lock member 282 to a position where it overlaps only the second ring 82 . In this case, the change of the aperture amount by the aperture changing mechanism 64 is restricted, and the movement of the focus lens 54 by the focus lens moving mechanism 62 is permitted.

Also, the first ring 72 and the second ring 82 may each have a first engaging portion which is a concave or convex portion other than the flat knurl instead of the first concave-convex portion 78 and the second concave-convex portion 88. good. Also, the lock member 282 may have a second engaging portion, which is a convex portion or concave portion other than the flat knurl, instead of the uneven portion 286 .

[Ninth Embodiment]
As shown in FIG. 23 as an example, in the ninth embodiment, the locking mechanism 280 according to the eighth embodiment is modified as follows. That is, the lock mechanism 280 has a first lock mechanism 292 and a second lock mechanism 294. As shown in FIG. The first locking mechanism 292 is provided on the front end side of the lens barrel 52 relative to the first ring 72 , and the second locking mechanism 294 is provided on the rear end side of the lens barrel 52 relative to the second ring 82 . The first locking mechanism 292 has a first locking member 302 and a first guide groove 304 , and the second locking mechanism 294 has a second locking member 312 and a second guide groove 314 . The structures of the first locking member 302 and the first guide groove 304 are the same as the locking member 282 and the guide groove 284 according to the eighth embodiment. Also, the configurations of the second locking member 312 and the second guide groove 314 are the same as those of the locking member 282 and the guide groove 284 according to the eighth embodiment.

The first locking member 302 slides between an unlocked position (see the left diagram of FIG. 23) retracted from the first ring 72 and a locked position overlapping the first ring 72 (see the right diagram of FIG. 23). The second locking member 312 slides between an unlocked position (see the left diagram of FIG. 23) retracted from the second ring 82 and a locked position (see the right diagram of FIG. 23) overlapping the second ring 82 .

When the first locking member 302 slides to the locked position, the concave-convex portion of the first locking member 302 engages with the first concave-convex portion 78 . In this state, the first ring 72 is fixed to the lens barrel 52 and movement of the focus lens 54 by the focus lens moving mechanism 62 is restricted. On the other hand, when the first locking member 302 slides to the unlocked position, the uneven portion of the first locking member 302 is separated from the first uneven portion 78 . In this state, the fixation of the first ring 72 to the lens barrel 52 is released, and movement of the focus lens 54 by the focus lens moving mechanism 62 is permitted. The state in which the first locking member 302 is slid to the unlocked position is an example of the “first state” according to the technology of the present disclosure, and the state in which the first locking member 302 is slid to the locked position is the state according to the technology of the present disclosure. This is an example of such a “second state”.

Similarly, when the second locking member 312 slides to the locked position, the uneven portion of the second locking member 312 engages with the second uneven portion 88 . In this state, the second ring 82 is fixed to the lens barrel 52, and the change of the aperture amount by the aperture changing mechanism 64 is restricted. On the other hand, when the second locking member 312 slides to the unlocked position, the uneven portion of the second locking member 312 is separated from the second uneven portion 88 . In this state, the fixing of the second ring 82 to the lens barrel 52 is released, and the change of the aperture amount by the aperture change mechanism 64 is allowed. The state in which the second locking member 312 is slid to the unlocked position is an example of the “first state” according to the technology of the present disclosure, and the state in which the second locking member 312 is slid to the locked position is the state according to the technology of the present disclosure. This is an example of such a “second state”.

In the ninth embodiment, the imaging device 10 includes a first locking mechanism 292 having a first locking member 302 and a first guide groove 304. When the first lock member 302 is slid to the unlocked position, it is in an unlocked state that allows the focus lens 54 to be moved by the focus lens moving mechanism 62 . On the other hand, when the first lock member 302 is slid to the lock position, it is in a locked state in which movement of the focus lens 54 by the focus lens moving mechanism 62 is restricted. Therefore, by switching the first lock member 302 between the unlocked position and the locked position, a state in which movement of the focus lens 54 by the focus lens moving mechanism 62 is allowed and a state in which the movement of the focus lens 54 by the focus lens moving mechanism 62 is permitted. You can switch to and from restricted states.

The imaging device 10 also includes a second locking mechanism 294 having a second locking member 312 and a second guide groove 314 . When the second lock member 312 is slid to the unlocked position, the second lock member 312 is in an unlocked state that allows the aperture change mechanism 64 to change the aperture amount. On the other hand, when the second lock member 312 is slid to the lock position, the second lock member 312 is in a locked state that restricts the change of the aperture amount by the aperture change mechanism 64 . Therefore, by switching the second lock member 312 between the unlocked position and the locked position, the state in which the change of the aperture amount by the aperture change mechanism 64 is allowed and the state in which the change in the aperture amount by the aperture change mechanism 64 is restricted. can be switched to

Also, in the ninth embodiment, the first locking mechanism 292 and the second locking mechanism 294 are independent of each other. Therefore, the first locking mechanism 292 and the second locking mechanism 294 can be switched independently between the unlocked state and the locked state.

[Tenth embodiment]
As an example, as shown in FIG. 24, in the tenth embodiment, the configuration of the lens device 14 is changed as follows from the eighth embodiment. That is, a third guide groove 322 is formed on the outer peripheral surface of the lens barrel 52 . The third guide groove 322 extends annularly along the circumferential direction of the lens barrel 52 . The third ring 142 of the polarizer rotating mechanism 66 is accommodated in the third guide groove 322 . By applying a rotational force to the third ring 142 , the third ring 142 rotates while being guided by the third guide groove 322 . The third ring 142 is bidirectionally rotatable along the circumferential direction of the third guide groove 322 . A polarizer 58 is housed inside the lens barrel 52 . A polarizer 58 is fixed to the third ring 142 via a connecting mechanism (not shown). A third uneven portion 146 is formed on the outer peripheral surface of the third ring 142 .

The lock member 282 is in an unlocked position (see the left diagram of FIG. 24) in which it is retracted from the first ring 72, the second ring 82, and the third ring 142, and a position in which it is retracted from the third ring 142 and slides between a first locking position overlapping (see middle view of FIG. 24) and a second locking position (see right view of FIG. 24) overlapping first ring 72, second ring 82 and third ring 142; .

As an example, as shown in FIG. 25 , when the locking member 282 slides to the second locking position, the concave-convex portion 286 of the locking member 282 engages with the third concave-convex portion 146 . At this time, the uneven portion 286 of the locking member 282 is also engaged with the first uneven portion 78 and the second uneven portion 88 . In this state, the first ring 72, the second ring 82, and the third ring 142 are fixed to the lens barrel 52, the focus lens 54 is moved by the focus lens moving mechanism 62, and the aperture amount is changed by the aperture changing mechanism 64. , and the rotation of the polarizer 58 by the polarizer rotating mechanism 66 is restricted.

On the other hand, when the locking member 282 slides to the first locking position, the uneven portion 286 of the locking member 282 is engaged with the first uneven portion 78 and the second uneven portion 88, but the uneven portion 286 of the locking member 282 is engaged with the third uneven portion. It becomes a state separated from the uneven portion 146 . In this state, the movement of the focus lens 54 by the focus lens moving mechanism 62 and the change of the aperture amount by the aperture changing mechanism 64 are restricted, but the third ring 142 is released from the lens barrel 52 and the polarizer rotating mechanism 66 is released. Rotation of polarizer 58 by is allowed.

Further, when the lock member 282 slides to the unlocked position, the uneven portion 286 of the lock member 282 is separated from the first uneven portion 78, the second uneven portion 88, and the third uneven portion 146. In this state, the fixing of the first ring 72 to the lens barrel 52, the fixing of the second ring 82 to the lens barrel 52, and the fixing of the third ring 142 to the lens barrel 52 are released. Movement, change of the aperture amount by the aperture changing mechanism 64, and rotation of the polarizer 58 by the polarizer rotating mechanism 66 are permitted.

The state in which the lock member 282 is slid to the unlocked position is an example of the “first state” according to the technology of the present disclosure. The state of being slid to the position is an example of the "second state" according to the technology of the present disclosure.

In the tenth embodiment, when the lock member 282 is slid to the unlocked position, the unlocked state allows the focus lens 54 to be moved by the focus lens moving mechanism 62 . On the other hand, when the lock member 282 is slid to the first lock position or the second lock position, the lock member 282 is in a locked state in which movement of the focus lens 54 by the focus lens moving mechanism 62 is restricted. Therefore, by switching the lock member 282 between the unlocked position and the first locked position or the second locked position, the state in which the focus lens moving mechanism 62 is permitted to move the focus lens 54 and the focus state by the focus lens moving mechanism 62 are changed. It is possible to switch to a state in which the movement of the lens 54 is restricted.

Similarly, when the lock member 282 is slid to the unlocked position, it is in an unlocked state that allows the aperture change mechanism 64 to change the aperture amount. On the other hand, when the lock member 282 is slid to the first lock position or the second lock position, the lock member 282 is in a locked state that limits the change of the aperture amount by the aperture change mechanism 64 . Therefore, by switching the lock member 282 between the unlocked position and the first lock position or the second lock position, the change of the aperture amount by the aperture change mechanism 64 is permitted, and the aperture change by the aperture change mechanism 64 is permitted. can be switched to and from the restricted state.

Also, when the lock member 282 is slid to the unlocked position, it is in an unlocked state that allows the polarizer 58 to be rotated by the polarizer rotating mechanism 66 . On the other hand, when the lock member 282 is slid to the second lock position, the lock member 282 is locked to restrict the rotation of the polarizer 58 by the polarizer rotating mechanism 66 . Therefore, by switching the lock member 282 between the unlocked position and the second locked position, the state in which the rotation of the polarizer 58 by the polarizer rotation mechanism 66 is allowed and the rotation of the polarizer 58 by the polarizer rotation mechanism 66 are changed. You can switch to and from restricted states.

[Eleventh embodiment]
As an example, as shown in FIG. 26, in the eleventh embodiment, the configuration of the imaging device 10 is changed as follows from the first embodiment. That is, the focus lens moving mechanism 62 has a first engaging portion 332 and the diaphragm changing mechanism 64 has a third engaging portion 336 . The lock mechanism 68 has a second engagement portion 334 , a fourth engagement portion 338 and a drive mechanism 340 . The second engaging portion 334 engages with the first engaging portion 332 and the fourth engaging portion 338 engages with the third engaging portion 336 . For example, the first engaging portion 332 is a convex portion or a concave portion, and the second engaging portion 334 is a concave portion or a convex portion that engages with the first engaging portion 332 . Similarly, for example, the third engaging portion 336 is a convex portion or a concave portion, and the fourth engaging portion 338 is a concave portion or a convex portion that engages with the third engaging portion 336 . The lock mechanism 68 is an example of the "first lock mechanism" and the "second lock mechanism" according to the technology of the present disclosure.

The drive mechanism 340 has a first actuator (not shown) that moves the second engaging portion 334 and a second actuator (not shown) that moves the fourth engaging portion 338 . Actuators such as electromagnetic solenoids are used for the first actuator and the second actuator, for example. The second engaging portion 334 is moved by the power applied by the first actuator, and the second engaging portion 334 is separated from the first engaging portion 332, and the second engaging portion 334 is separated from the first engaging portion. 332 and the engaged state. The drive mechanism 340 is an example of the "first drive mechanism" and the "second drive mechanism" according to the technology of the present disclosure.

When the second engaging portion 334 is engaged with the first engaging portion 332, the first ring 72 is fixed to the lens barrel 52, and movement of the focus lens 54 by the focus lens moving mechanism 62 is restricted. On the other hand, when the second engaging portion 334 is separated from the first engaging portion 332, the fixing of the first ring 72 to the lens barrel 52 is released, and movement of the focus lens 54 by the focus lens moving mechanism 62 is allowed. . The state in which the second engaging portion 334 is engaged with the first engaging portion 332 is an example of the “first state” according to the technology of the present disclosure, and the second engaging portion 334 is separated from the first engaging portion 332 The separated state is an example of a "second state" according to the technology of the present disclosure.

Similarly, when the fourth engaging portion 338 is engaged with the third engaging portion 336, the second ring 82 is fixed to the lens barrel 52, and the change of the aperture amount by the aperture changing mechanism 64 is restricted. . On the other hand, when the fourth engaging portion 338 is separated from the third engaging portion 336, the fixing of the second ring 82 to the lens barrel 52 is released, and the aperture change mechanism 64 is allowed to change the aperture amount. A state in which the fourth engaging portion 338 is engaged with the third engaging portion 336 is an example of a “first state” according to the technology of the present disclosure, and the fourth engaging portion 338 is separated from the third engaging portion 336 The separated state is an example of a "second state" according to the technology of the present disclosure.

Also, in the eleventh embodiment, a sensor 342 is used. A sensor 342 detects the rotational position of the polarizer 58 and outputs a rotation signal corresponding to the rotational position. For the sensor 342, a sensor such as a potentiometer that detects the rotational position is used. The rotation signal is an example of the "sensor detection result" according to the technology of the present disclosure.

As shown in FIG. 27 as an example, the NVM 44 stores an imaging support processing program 350 . The imaging support processing program 350 is an example of a “program” according to the technology of the present disclosure. The CPU 42 reads the imaging support processing program 350 from the NVM 44 and executes the read imaging support processing program 350 on the RAM 46 . The CPU 42 performs imaging support processing according to an imaging support processing program 350 executed on the RAM 46 . In the imaging support process, the CPU 42 operates as a rotation signal acquisition section 352 , a lock determination section 354 , an unlock control section 356 and a lock control section 358 .

As shown in FIG. 26 as an example, the rotation signal acquisition unit 352 acquires the rotation signal input from the sensor 342 .

The lock determination unit 354 determines whether or not to lock. As an example, the lock determination unit 354 determines to unlock when determining that the polarizer 58 is not rotating based on the rotation signal. On the other hand, when the lock determination unit 354 determines that the polarizer 58 is rotating based on the rotation signal, it determines that the lock is to be performed.

Further, as an example, the lock determination unit 354 determines to unlock when it determines that an unlock instruction to unlock has been received by the receiving device 24 and/or the external I/F 26 . On the other hand, when the lock determination unit 354 determines that the lock instruction to lock has been received by the receiving device 24 and/or the external I/F 26, it determines to lock. The instruction to lock that is received by the reception device 24 and/or the external I/F 26 is an example of the "instruction from outside" according to the technology of the present disclosure.

The CPU 42 has an unlock mode and a lock mode as operation modes. When the lock determination unit 354 determines to unlock, the CPU 42 switches to the unlock mode, and when the lock determination unit 354 determines to lock, the CPU 42 switches to the lock mode. The CPU 42 operates as the unlock control unit 356 in the unlock mode. On the other hand, the CPU 42 operates as the lock controller 358 in the lock mode. The unlock mode is an example of the "first mode" according to the technology of the present disclosure, and the lock mode is an example of the "second mode" according to the technology of the present disclosure. The CPU 42 is an example of the "first processor" and the "second processor" according to the technology of the present disclosure.

The unlock control unit 356 outputs an unlock command to the drive mechanism 340 . Upon receiving the unlock command, the drive mechanism 340 moves the second engaging portion 334 away from the first engaging portion 332 and moves the fourth engaging portion 338 away from the third engaging portion 336. Let As a result, the lock mechanism 68 is unlocked, and movement of the focus lens 54 and change of the aperture amount by the aperture change mechanism 64 are permitted.

The lock control unit 358 outputs a lock command to the drive mechanism 340. Upon receiving the lock command, the drive mechanism 340 moves the second engaging portion 334 in a direction to engage with the first engaging portion 332 and engages the fourth engaging portion 338 with the third engaging portion 336. move in the direction Thereby, the lock mechanism 68 is locked, and the movement of the focus lens 54 and the change of the aperture amount by the aperture change mechanism 64 are restricted.

Next, the action of the imaging device 10 according to the eleventh embodiment will be described with reference to FIG. FIG. 28 shows an example of the flow of imaging support processing according to the eleventh embodiment.

In the imaging support process shown in FIG. 28, first, in step S11, the rotation signal acquisition unit 352 acquires the rotation signal input from the sensor 342. FIG.

In step S12, the lock determination unit 354 determines whether or not to lock based on the rotation signal and the instruction received by the reception device 24 and/or the external I/F 26. In step S12, when the lock determination unit 354 determines to lock, the process shown in FIG. 28 proceeds to step S13. On the other hand, if the lock determination unit 354 determines not to lock in step S12, the process shown in FIG. 28 proceeds to step S14.

At step S13, the unlock control unit 356 outputs an unlock command to the drive mechanism 340 to bring the lock mechanism 68 into the unlocked state.

At step S14, the unlock control unit 356 outputs a lock command to the drive mechanism 340 to bring the lock mechanism 68 into the locked state.

The process shown in FIG. 28 returns to step S11 after step S13 or step S14. Then, the process shown in FIG. 28 repeats steps S11 to S13 or S14 until it is stopped by an instruction from the user and/or an instruction from the outside.

As detailed above, in the eleventh embodiment, the lock mechanism 68 is switched between the unlocked state and the locked state according to the detection result of the sensor 342 . Therefore, when the user rotates the polarizer 58, the trouble of switching the locking mechanism 68 between the unlocked state and the locked state can be saved.

Also, the CPU 42 switches between the unlock mode and the lock mode based on an external instruction accepted by the accepting device 24 and/or the external I/F 26 . Therefore, by giving an instruction from the receiving device 24 and/or the external I/F 26 to the CPU 42, the lock mechanism 68 can be switched between the unlocked state and the locked state.

Note that the CPU 42 switches between the unlock mode and the lock mode based on an external instruction received by the reception device 24 and/or the external I/F 26, but switches to the unlock mode based on information obtained from the subject. and lock mode. Information obtained from the subject in this case includes, for example, the subject's type, temperature, environment, motion, and the like.

[Twelfth Embodiment]
As an example, as shown in FIG. 29, in the twelfth embodiment, the configuration of the imaging device 10 is changed as follows from the eleventh embodiment. That is, the polarizer rotating mechanism 66 has a motor 362 . Motor 362 imparts rotational force to polarizer 58 .

The CPU 42 operates as a first image acquisition section 372 , a first rotation control section 374 , a second image acquisition section 376 , a rotation necessity determination section 378 and a second rotation control section 380 .

As an example, as shown in FIG. 29, the first image acquisition unit 372 acquires a first image based on first digital image data obtained by capturing an image of light transmitted through the polarizer 58 by the image sensor 16. do. The first image is the image obtained when the polarizer 58 is in the first position.

The first rotation control section 374 outputs a first rotation command to rotate the polarizer 58 from the first position to the second position. As an example, the second position is a position where the polarizer 58 is rotated 90 degrees from the first position. Motor 362 rotates polarizer 58 from the first position to the second position according to the first rotation command.

The second image acquisition unit 376 acquires a second image based on second digital image data obtained by capturing an image of light transmitted through the polarizer 58 by the image sensor 16 . The second image is the image obtained when the polarizer 58 is in the second position.

The rotation necessity determination unit 378 determines whether or not the polarizer 58 needs to be rotated.
As an example, the rotation necessity determining unit 378 compares the first image and the second image, and determines that the second image includes the reflected image 166 and the first image does not include the reflected image 166. In this case, it is determined that the polarizer 58 needs to be rotated. On the other hand, the rotation necessity determining unit 378 compares the first image and the second image, and determines that the second image does not include the reflected image 166 and the first image includes the reflected image 166. In this case, it is determined that the polarizer 58 does not need to be rotated.

Further, the rotation necessity determination unit 378 determines that the polarizer 58 does not need to be rotated when the reflected image 166 is not included in both the first image and the second image. Further, when the reflected image 166 is included in both the first image and the second image, the rotation necessity determination unit 378 determines that the brightness of the reflected image 166 included in the second image is the same as that of the reflected image 166 included in the first image. , it is determined that the polarizer 58 needs to be rotated. On the other hand, when the reflected image 166 is included in both the first image and the second image, the rotation necessity determination unit 378 determines that the brightness of the reflected image 166 included in the second image is the brightness of the reflected image 166 included in the first image. , it is determined that the polarizer 58 does not need to be rotated. The rotation necessity determination unit 378 determines whether or not the reflected image 166 is included in the first image and the second image by using various image analysis processes.

When the rotation necessity determination unit 378 determines that the polarizer 58 needs to be rotated, the second rotation control unit 380 rotates the polarizer 58 from the second position to the first position. Outputs a rotation command. Motor 362 rotates polarizer 58 from the second position to the first position according to the second rotation command. The CPU 42 is an example of a "third processor" according to the technology of the present disclosure. The motor 362 is an example of a "third drive mechanism".

Next, the action of the imaging device 10 according to the twelfth embodiment will be described with reference to FIG. FIG. 30 shows an example of the flow of imaging support processing according to the twelfth embodiment.

In the imaging support process shown in FIG. 30, first, in step S21, the first image acquisition unit 372 acquires the first image based on the first digital image data.

At step S22, the first rotation controller 374 outputs a first rotation command to rotate the polarizer 58 from the first position to the second position.

At step S23, the second image acquisition unit 376 acquires the second image based on the second digital image data.

In step S24, the rotation necessity determination unit 378 determines whether or not the polarizer 58 needs to be rotated based on the first image and the second image. In step S24, if the rotation necessity determining unit 378 determines that the polarizer 58 needs to be rotated, the process shown in FIG. 30 proceeds to step S25. On the other hand, if the rotation necessity determining unit 378 determines in step S24 that the polarizer 58 does not need to be rotated, the process shown in FIG. 30 ends.

In step S25, the second rotation control section 380 outputs a second rotation command to rotate the polarizer 58 from the second position to the first position.

The processing shown in FIG. 30 ends after step S25.

As described in detail above, in the twelfth embodiment, the CPU 42 controls the first image obtained by the image sensor 16 capturing the light transmitted through the polarizer 58 when the polarizer 58 is at the first position. , the polarizer rotating mechanism 66 is controlled based on a second image obtained by imaging the light transmitted through the polarizer 58 when the polarizer 58 is at the second position by the image sensor 16 . Therefore, for example, the user can save the trouble of rotating the polarizer 58 by the polarizer rotating mechanism 66 while checking the first image and the second image.

The first to twelfth embodiments have been described above, but among the configurations described in the above embodiments and modifications, configurations that can be combined may be combined as appropriate. Further, when the above-described embodiment and modifications are combined, if there are multiple overlapping steps, priority may be given to the multiple steps according to various conditions.

Further, in the above-described embodiment, a lens-interchangeable digital camera is exemplified as the imaging device 10, but this is merely an example, and a fixed-lens digital camera, a smart device, It may be a digital camera incorporated in various electronic devices such as a wearable terminal, a cell observation device, an ophthalmologic observation device, or a surgical microscope. Further, the imaging device 10 may be a glasses-type eyewear terminal or a head-mounted display terminal worn on the head. Also, in the eyewear terminal or the head-mounted display terminal, a display may be provided for only one eye, or may be provided for both eyes. Also, the display may be formed to be translucent.

Also, in the above embodiment, the CPU 42 was exemplified, but instead of or together with the CPU 42, at least one other CPU, at least one GPU, and/or at least one TPU may be used.

Further, in the above embodiment, an example of the form in which the imaging support processing program 350 is stored in the NVM 44 has been described, but the technology of the present disclosure is not limited to this. For example, the imaging support processing program 350 may be stored in a portable non-temporary storage medium such as an SSD or USB memory. The imaging support processing program 350 stored in the non-temporary storage medium is installed in the computer 36 of the imaging device 10 . The CPU 42 executes imaging support processing according to the imaging support processing program 350 .

Further, the imaging support processing program 350 is stored in a storage device such as another computer or a server device connected to the imaging device 10 via a network, and the imaging support processing program 350 is downloaded in response to a request from the imaging device 10. and may be installed on computer 36 .

Note that it is not necessary to store all of the imaging support processing program 350 in another computer 36 connected to the imaging device 10, a storage device such as a server device, or the NVM 44, and a part of the imaging support processing program 350 is stored. You can let it go.

Although the computer 36 is incorporated in the imaging device 10 shown in FIG. 2, the technology of the present disclosure is not limited to this, and the computer 36 may be provided outside the imaging device 10, for example.

Further, although the computer 36 including the CPU 42, NVM 44, and RAM is illustrated in the above embodiment, the technology of the present disclosure is not limited to this, and instead of the computer 36, an ASIC, FPGA, and/or PLD may be used. A device containing Also, instead of the computer 36, a combination of hardware and software configurations may be used.

Also, as hardware resources for executing the imaging support processing described in the above embodiment, the following various processors can be used. Examples of the processor include a CPU, which is a general-purpose processor that functions as a hardware resource that executes imaging support processing by executing software, that is, a program. Also, processors include, for example, FPGAs, PLDs, ASICs, and other dedicated electric circuits that are processors having circuit configurations specially designed to execute specific processing. Each processor has a built-in memory or is connected to the memory, and each processor uses the memory to execute imaging support processing.

The hardware resource that executes the imaging support processing may be configured with one of these various processors, or a combination of two or more processors of the same or different types (for example, a combination of multiple FPGAs, or (combination of CPU 42 and FPGA). Also, the hardware resource for executing the imaging support process may be one processor.

As an example of configuration with one processor, first, there is a form in which one processor is configured by combining one or more CPUs and software, and this processor functions as a hardware resource for executing imaging support processing. . Secondly, as typified by SoC, etc., there is a form that uses a processor that realizes the function of the entire system including multiple hardware resources for executing imaging support processing with a single IC chip. In this way, the imaging support processing is implemented using one or more of the above-described various processors as hardware resources.

Furthermore, as the hardware structure of these various processors, more specifically, an electric circuit in which circuit elements such as semiconductor elements are combined can be used. Also, the imaging support process described above is merely an example. Therefore, it goes without saying that unnecessary steps may be deleted, new steps added, and the order of processing may be changed without departing from the scope of the invention.

The descriptions and illustrations shown above are detailed descriptions of the parts related to the technology of the present disclosure, and are merely examples of the technology of the present disclosure. For example, the above descriptions of configurations, functions, actions, and effects are descriptions of examples of configurations, functions, actions, and effects of portions related to the technology of the present disclosure. Therefore, unnecessary parts may be deleted, new elements added, or replaced with respect to the above-described description and illustration without departing from the gist of the technology of the present disclosure. Needless to say. In addition, in order to avoid complication and facilitate understanding of the portion related to the technology of the present disclosure, the descriptions and illustrations shown above require particular explanation in order to enable implementation of the technology of the present disclosure. Descriptions of common technical knowledge, etc., that are not used are omitted.

In this specification, "A and/or B" is synonymous with "at least one of A and B." That is, "A and/or B" means that only A, only B, or a combination of A and B may be used. Also, in this specification, when three or more matters are expressed by connecting with "and/or", the same idea as "A and/or B" is applied.

All publications, patent applications and technical standards mentioned herein are expressly incorporated herein by reference to the same extent as if each individual publication, patent application and technical standard were specifically and individually noted to be incorporated by reference. incorporated by reference into the book.

Claims

A focus lens that allows light to pass through,
a moving mechanism for moving the focus lens in the optical axis direction;
a polarizer displaced between a first position that transmits a first polarization component contained in the light and a second position that transmits a second polarization component contained in the light;
a displacement mechanism that displaces the polarizer;
a first lock mechanism having a first state that permits movement of the focus lens by the movement mechanism and a second state that restricts movement of the focus lens by the movement mechanism;
A lens device with a
The lens device according to claim 1, wherein the first state and the second state are switched based on displacement of the polarizer by the displacement mechanism.
an aperture through which the light passes;
a changing mechanism for changing the aperture amount of the light by the aperture;
further comprising
a second lock mechanism having a third state that permits change of the throttle amount by the change mechanism and a fourth state that restricts change of the throttle amount by the change mechanism;
The lens device according to claim 1 or 2, comprising:
The lens device according to claim 3, wherein the third state and the fourth state are switched based on the displacement of the polarizer by the displacement mechanism.
The lens device according to claim 4, wherein switching between the first state and the second state and switching between the third state and the fourth state are performed in parallel.
The lens device according to any one of claims 1 to 5, wherein the displacement mechanism includes a rotation mechanism that rotates the polarizer around the optical axis direction.
The polarizer has a first polarizer that transmits the first polarization component and a second polarizer that transmits the second polarization component,
6. The displacement mechanism includes a slide mechanism for switching between the first polarizer and the second polarizer by sliding the polarizer in a direction crossing the optical axis direction. The lens device according to the paragraph.
further comprising a lens barrel that supports the moving mechanism and the displacement mechanism;
the first state is a state in which the first locking mechanism releases the fixing of the moving mechanism to the lens barrel;
The lens device according to any one of claims 1 to 7, wherein the second state is a state in which the first locking mechanism fixes the moving mechanism to the lens barrel.
further comprising a lens barrel that supports the moving mechanism and the displacement mechanism;
the first state is a state in which the first locking mechanism is removed from the lens barrel;
The lens device according to any one of claims 1 to 7, wherein the second state is a state in which the first lock mechanism is attached to the lens barrel.
The moving mechanism has a first engaging portion,
The first locking mechanism has a second engaging portion,
The first state is a state in which the first engaging portion is separated from the second engaging portion,
The lens device according to any one of Claims 1 to 7, wherein the second state is a state in which the first engaging portion is engaged with the second engaging portion.
a sensor that detects the position of the polarizer;
a first drive mechanism that moves the second engaging portion according to the detection result of the sensor;
11. The lens device of claim 10, further comprising:
12. The lens device according to claim 11, further comprising a first processor that controls said first driving mechanism based on the detection result of said sensor.
a second drive mechanism that drives the first lock mechanism;
The lens apparatus according to any one of claims 1 to 7, further comprising a second processor that controls the second drive mechanism.
The second processor controls the second drive mechanism in a first mode in which the first lock mechanism is switched to the first state; 14. The lens device according to claim 13, further comprising a second mode that controls switching between two states.
15. The lens apparatus according to claim 14, wherein said second processor switches between said first mode and said second mode based on an external instruction or information obtained from a subject.
a third drive mechanism that drives the displacement mechanism;
16. The lens apparatus according to any one of claims 1 to 15, further comprising a third processor that controls said third drive mechanism.
The third processor generates a first image obtained by an image sensor capturing the light transmitted through the polarizer when the polarizer is at the first position, and 17. The lens device according to claim 16, wherein the third drive mechanism is controlled based on a second image obtained by imaging the light transmitted through the polarizer with the image sensor when the lens device is in the position. .
The lens device according to any one of claims 1 to 17, further comprising a filter that selectively transmits near-infrared light contained in the light.
19. A lens device according to claim 18, wherein the filter is integral with the polarizer.
a lens device according to any one of claims 1 to 19;
an image sensor on which the light transmitted through the lens device is imaged;
An imaging device comprising: