Imaging apparatus and control method of imaging apparatus

Abstract

To display information about the imaging distance that can be set according to the lighting conditions using an optical filter.SOLUTION: A disclosed imaging apparatus includes: an image element that has an imaging surface; a switching mechanism that is configured to switch the state of light incident on the imaging surface between a first state and a second state that is different from the first state by changing the same by means of an optical filter; a display unit that displays information; and a processor that controls the image element, the switching mechanism, and the display unit. The processor is configured to determine whether the state is the first state or the second state, and when determined as the first state, to display a piece of first information indicating a first range of the imaging distance that can be set in the first state on the display unit, and when determined as the second state, to display a piece of second information indicating a second range of the imaging distance that can be set in the second state on the display unit.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present disclosure relates to an imaging device and a control method for the imaging device. [Background technology]

[0002] For example, Patent Document 1 discloses an imaging device that can adjust the focus when the image is out of focus while using an optical filter. The imaging device described in Patent Document 1 has an imaging element, an optical filter, and a control unit that adjusts the exposure. The optical filter is movable between a first position inserted into the imaging range and a second position retracted from the imaging range. The control unit adjusts the exposure when the image is out of focus when the optical filter is in the first position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-128190 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a demand for image capture devices that display information about a settable shooting distance in response to switching of light conditions using an optical filter.

[0005] Therefore, an object of the present disclosure is to provide an imaging device that displays information about a settable shooting distance in response to switching of light conditions using an optical filter, and a control method for the imaging device. [Means for solving the problem]

[0006] In order to solve the above-described problems, an imaging device according to one aspect of the present disclosure includes: an imaging element having an imaging surface onto which light from a subject is incident; a switching mechanism that switches between a first state and a second state different from the first state by changing the state of the light incident on the imaging surface using an optical filter; a display device for displaying information; a processor that controls the image sensor, the switching mechanism, and the display device; Equipped with The processor: determining whether the first state or the second state is present; When the camera is in the first state, first information indicating a first range of a photographing distance that can be set in the first state is displayed on the display device; When the camera is in the second state, second information indicating a second range of the shooting distance that can be set in the second state is displayed on the display device.

[0007] A control method for an imaging device according to one aspect of the present disclosure includes: A control method for an imaging device including an imaging element having an imaging surface onto which light from a subject is incident, a switching mechanism that switches between a first state and a second state different from the first state by changing the state of the light incident on the imaging surface using an optical filter, and a display device that displays information, comprising: determining whether the first state or the second state is present; When the camera is in the first state, displaying on the display device first information indicating a first range of shooting distances that can be set in the first state; When the camera is in the second state, displaying second information on the display device that indicates a second range of the shooting distance that can be set in the second state; Includes: [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide an imaging device and a control method for an imaging device that display information about a settable shooting distance in response to switching of the light state using an optical filter. [Brief explanation of the drawings]

[0009] [Figure 1]1 is a schematic front perspective view of an imaging device according to a first embodiment of the present disclosure; [Figure 2] FIG. 1 is a block diagram showing a schematic configuration of an imaging device according to a first embodiment of the present disclosure. [Figure 3] Rear perspective view of the filter module [Figure 4] Exploded rear perspective view of the filter module [Figure 5A] FIG. 10 is a rear view of the filter module in a state where the first filter unit is located in the first filtering position and the second filter unit is located in the second retracted position. [Figure 5B] FIG. 10 is a rear view of the filter module in a state where the first filter unit is located in the first retracted position and the second filter unit is located in the second filtering position; [Figure 6] Schematic diagram of the detection mechanism [Figure 7A] Schematic diagram of the optical path in the first optical filter [Figure 7B] Schematic diagram of the optical path in the second optical filter [Figure 8A] Schematic diagram for explaining adjustment of the shooting distance caused by focus shift due to switching of optical filters [Figure 8B] Schematic diagram for explaining adjustment of the shooting distance caused by focus shift due to switching of optical filters [Figure 9] 1 is a schematic flowchart of a control method for an imaging device according to a first embodiment of the present disclosure. [Figure 10A] FIG. 10 is a schematic diagram illustrating an example of a display on the liquid crystal monitor in a first state; [Figure 10B] FIG. 10 is a schematic diagram illustrating an example of a display on the LCD monitor in a second state; [Figure 11A] 10 is a schematic diagram of another example of the display on the liquid crystal monitor in the first state; FIG. [Figure 11B] FIG. 10 is a schematic diagram of another example of the display on the LCD monitor in the second state; [Figure 11C] FIG. 10 is a schematic diagram of another example of the display on the LCD monitor in the second state; [Figure 12] 10 is a flowchart of a process for determining a first range in a control method for an imaging device according to a second embodiment of the present disclosure. [Figure 13] 10 is a flowchart of a process for determining a second range in a control method for an imaging device according to a second embodiment of the present disclosure. [Figure 14] 10 is a schematic flowchart of a control method for an imaging device according to a third embodiment of the present disclosure. [Figure 15] Schematic diagram of an example of display change on the LCD monitor [Figure 16] FIG. 1 is a schematic diagram illustrating an imaging device according to a first modification; [Figure 17A] FIG. 10 is a block diagram showing a schematic configuration of a first filter unit according to Modification 2. [Figure 17B] FIG. 10 is a block diagram showing a schematic configuration of a second filter unit according to Modification 2. [Figure 18] FIG. 10 is a schematic diagram illustrating an imaging device according to a third modification. DETAILED DESCRIPTION OF THE INVENTION

[0010] (Background to this disclosure) In an imaging device, an optical filter is used to change the state of light incident on an imaging element. For example, if the optical filter is clear glass or ND (Neutral Density) glass, it changes the light transmittance. For example, if the optical filter is a UV filter or an IR filter, it blocks ultraviolet or infrared light. For example, the optical filter is configured to be movable in front of the imaging surface of the imaging element, and when capturing an image of a subject, the state of light is changed by switching the optical filter located in front of the imaging surface of the imaging element.

[0011] Each optical filter has a different refractive index and / or thickness. Therefore, when switching between optical filters, the refractive index and / or thickness of the optical filter can cause a focus shift, which can cause the focus position of the light that passes through the optical filter to shift. In this case, the focus is shifted, so the shooting distance is adjusted manually or automatically to bring the image into focus.

[0012] However, if switching an optical filter causes the focus to shift, it may be impossible to adjust the shooting distance. For example, when adjusting the shooting distance by driving a focus lens, if the focus lens is positioned at the drive limit, the focus lens cannot be moved beyond the drive limit. This may result in a range of shooting distances that cannot be set depending on the optical filter. In such cases, the user may not be aware of the range of shooting distances that cannot be set using the optical filter.

[0013] Therefore, the inventor(s) conducted extensive research and discovered a configuration that displays information about a settable shooting distance in response to switching of light conditions using an optical filter, leading to the present disclosure.

[0014] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanation of well-known matters or redundant explanation of substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following explanation and to facilitate understanding by those skilled in the art.

[0015] The inventor(s) provide the accompanying drawings and the following description to enable those skilled in the art to fully understand the present disclosure, and do not intend for them to limit the subject matter described in the claims.

[0016] Hereinafter, an imaging device and a method for controlling the imaging device according to a first embodiment of the present disclosure will be described with reference to the drawings.

[0017] (Embodiment 1) [Overall configuration] 1 is a schematic front perspective view of an imaging device according to a first embodiment of the present disclosure. Note that the XYZ Cartesian coordinate system shown in the figure is intended to facilitate understanding of the embodiment of the present disclosure and does not limit the embodiment of the present disclosure. The X-axis direction is the front-to-rear direction of the imaging device, the Y-axis direction is the left-to-right direction, and the Z-axis direction is the height direction. Note that the side on which a subject is present during imaging is defined as the front side of the imaging device.

[0018] 1, an imaging device 10 according to the first embodiment of the present disclosure is a so-called digital single-lens camera. The imaging device 10 includes a camera body 100. The camera body 100 is provided with a body mount 101. An interchangeable lens 200 is detachably attached to the body mount 101. The imaging device 10 also includes a filter module 150 that switches the state of light.

[0019] FIG. 2 is a block diagram showing a schematic configuration of the imaging device according to the first embodiment of the present disclosure.

[0020] As shown in FIG. 2, the camera body 100 includes a camera controller 110, a flash memory 111, and an image sensor 120, which is an example of an imaging element.

[0021] The camera controller 110 controls the overall operation of the imaging device 10 by controlling components such as the image sensor 120 in response to instructions from various buttons such as the release button 102 and various operating members. Specifically, the camera controller 110 transmits a vertical synchronization signal to a timing generator (TG) 113 and generates an exposure synchronization signal based on the vertical synchronization signal. The camera controller 110 also periodically transmits the generated exposure synchronization signal to the interchangeable lens 200 via the body mount 101. In this way, the camera controller 110 controls the interchangeable lens 200 so as to synchronize with the exposure timing.

[0022] The camera controller 110 includes a processor, and the processor executes instructions to realize predetermined functions. For example, the camera controller 110 may be realized by various processors such as a CPU, MPU, GPU, DSU, FPGA, or ASIC. The processor may be configured as a dedicated electronic circuit designed to realize predetermined functions. The camera controller 110 may also be configured with one or more processors. The camera controller 110 uses the DRAM 112 as a working memory during control operations and image processing operations.

[0023] The flash memory 111 stores instructions executed by the camera controller 110. For example, the flash memory 111 stores programs, parameters, data, etc. used when controlling the camera controller 110. The camera controller 110 executes various control operations based on the programs, parameters, data, etc. stored in the flash memory 111.

[0024] The image sensor 120 captures an image of a subject incident through the interchangeable lens 200 and generates image data. The image sensor 120 has an imaging surface onto which light from the subject image is incident. The image data generated by the image sensor 120 is digitized by an analog-to-digital conversion circuit (ADC) 114. The image data digitized by the analog-to-digital conversion circuit is subjected to predetermined image processing by the camera controller 110. The image data processed by the camera controller 110 is displayed on a liquid crystal monitor 103, which is an example of a display device provided on the back of the camera body 100. The image sensor 120 is, for example, a CCD (Charge Coupled Device) sensor or a CMOS (Complementary Metal Oxide Semiconductor) sensor.

[0025] The image sensor 120 operates at a timing controlled by the timing generator 113. The operations of the image sensor 120 include capturing a still image, capturing a through image, transferring data, and operating an electronic shutter.

[0026] The camera body 100 includes a card slot 105 to which a memory card 104 is detachably connected, and a power source 106 .

[0027] The card slot 105 is configured to be electrically and mechanically connectable to the memory card 104. The memory card 104 is an external memory equipped with a storage element such as a flash memory inside. The memory card 104 stores various data including image data that has been image-processed by the camera controller 110. The various data stored in the memory card 104 is read by the camera controller 110 via the card slot 105, for example, and displayed on the LCD monitor 103.

[0028] The power supply 106 supplies power to drive the image capture device 10. The power supply 106 may be, for example, a dry cell battery or a rechargeable battery, or may supply power to the image capture device 10 from an external source via a power cord. When the power supply 106 is turned on, the camera controller 110 supplies power to each component of the camera body 100. The camera controller 110 also supplies power to the interchangeable lens 200 via the body mount 101. The power is supplied to each component of the interchangeable lens 200 by a lens controller 210, which will be described later.

[0029] The body mount 101 is configured to be mechanically and electrically connectable to the lens mount 201 provided in the interchangeable lens 200. The body mount 101 is also configured to be able to send and receive data between the camera body 100 and the interchangeable lens 200 via the lens mount 201. The body mount 101 transmits an exposure synchronization signal and other control signals received from the camera controller 110 to the lens controller 210 via the lens mount 201. The body mount 101 also transmits signals received from the lens controller 210 to the camera controller 110 via the lens mount 201.

[0030] Camera body 100 includes a first optical filter 130, a second optical filter 131, a switching mechanism 134, and a detection mechanism 135. In this embodiment, first optical filter 130, second optical filter 131, switching mechanism 134, and detection mechanism 135 configure filter module 150 in FIG.

[0031] The first optical filter 130 and the second optical filter 131 are filters used to change the state of light. Specifically, when capturing an image of a subject, the state of light incident on the imaging surface 120a of the image sensor 120 is switched by switching between the first optical filter 130 and the second optical filter 131. In this embodiment, the state of light realized by using the first optical filter 130 is referred to as a first state, and the state of light realized by using the second optical filter 131 is referred to as a second state.

[0032] In the present embodiment, as an example, the first optical filter 130 and the second optical filter 131 are filters used to change the transmittance of light. For example, the first optical filter 130 is clear glass, and the second optical filter 131 is an ND filter.

[0033] The switching mechanism 134 switches between a first state and a second state different from the first state by changing the state of light incident on the imaging surface 120a of the image sensor 120 using the first optical filter 130 or the second optical filter 131. That is, the switching mechanism 134 switches between the first state and the second state by switching between using the first optical filter 130 and the second optical filter 131.

[0034] The switching mechanism 134 includes a drive mechanism that moves the first and second optical filters 130, 131 between a filtering position and a retracted position. The filtering position is a position where the first optical filter 130 or the second optical filter 131 is disposed in front of the imaging surface of the image sensor 120, and light before reaching the imaging surface passes through the first optical filter 130 or the second optical filter 131. The retracted position is a position where the first optical filter 130 or the second optical filter 131 is removed from in front of the imaging surface.

[0035] In this embodiment, the drive mechanism rotates the first optical filter 130 between a first filtering position and a first retracted position, and rotates the second optical filter 131 between a second filtering position and a second retracted position. In the first state, the first optical filter 130 is disposed at the first filtering position, and the second optical filter 131 is disposed at the second retracted position. In the second state, the first optical filter 130 is disposed at the first retracted position, and the second optical filter 131 is disposed at the second filtering position.

[0036] The detection mechanism 135 detects the first state and the second state. For example, the detection mechanism 135 detects the first and second states based on the positions of the first and second optical filters 130, 131. The detection mechanism 135 detects the first state when the first optical filter 130 is disposed in the first filtering position. The detection mechanism 135 detects the second state when the second optical filter 131 is disposed in the second filtering position.

[0037] The flash memory 111 stores a first range of settable shooting distances in the first state and a second range of settable shooting distances in the second state. The settable shooting distances refer to shooting distances at which the subject can be focused by driving the lens or image sensor through user operation or an automatic program.

[0038] The first range and the second range are set in advance during the manufacturing stage of the imaging device 10. For example, the first range is set based on the focus deviation caused by the first optical filter 130. Furthermore, the second range is set based on the focus deviation caused by the second optical filter 131.

[0039] In the present embodiment, the first optical filter 130 is clear glass, and the second optical filter 131 is an ND filter. For example, the second optical filter 131 has a larger refractive index and a larger thickness than the first optical filter 130. Therefore, the second optical filter 131 is more likely to be out of focus than the first optical filter 130. As a result, the second range is set to be smaller than the first range.

[0040] The interchangeable lens 200 includes an optical system OP and a lens controller 210.

[0041] The optical system OP is a combination of optical members for forming a subject image on the imaging surface of the image sensor 120. The optical system OP includes a zoom lens 220, an aperture 230, an OIS (Optical Image Stabilizer) lens 240, and a focus lens 250.

[0042] The zoom lens 220 is a lens for changing the magnification of a subject image formed by the optical system OP. The zoom lens 220 is composed of one or more lenses. The zoom lens 220 is moved forward and backward in the optical axis direction A1 by a zoom lens driving unit 221. The zoom lens driving unit 221 includes a zoom ring or the like that can be operated by the user, and transmits the user's operation to the zoom lens 220, thereby moving the zoom lens 220 forward and backward in the optical axis direction A1.

[0043] Aperture 230 adjusts the amount of light incident from the subject onto the imaging surface of image sensor 120. Aperture 230 adjusts the amount of light incident onto the imaging surface by changing the size of a through-hole through which the light passes. Aperture 230 is driven by aperture drive unit 231.

[0044] The OIS lens 240 is a lens for correcting blur of a subject image formed by the optical system of the interchangeable lens 200. The OIS lens 240 is composed of one or more lenses. The OIS lens 240 reduces blur of the subject image on the image sensor 120 by moving in a direction that offsets shake of the imaging device 10. The function of correcting camera shake by moving the OIS lens 240 is called the "OIS function." The interchangeable lens 200 includes a gyro sensor 241, a position sensor 242, an OIS driver 243, and an OIS processor 244 as components that realize the OIS function.

[0045] The gyro sensor 241 is a unit that detects shake of the interchangeable lens 200. The position sensor 242 is a sensor that detects the position of the OIS lens 240 in a plane perpendicular to the optical axis direction A1. The position sensor 242 can be realized, for example, by a magnet and a Hall element. The OIS driver 243 moves the OIS lens 240. The OIS driver 243 can be realized, for example, by a magnet and a flat coil. Based on the detection results of the gyro sensor 241 and the position sensor 242, the OIS processor 244 controls the OIS driver 243 to perform shake correction processing that moves the OIS lens 240 in a plane perpendicular to the optical axis direction A1 so as to offset shake of the interchangeable lens 200.

[0046] The focus lens 250 is a lens for changing the focus state of the subject image formed on the image sensor 120 by the optical system OP. The focus lens 250 is made up of one or more lenses. The focus lens 250 is moved in the optical axis direction A1 by a focus lens drive unit 251. The focus lens drive unit 251 includes a focus ring that can be operated by the user, a drive mechanism that realizes an autofocus function, and the like, and transmits the user's operation to the focus lens 250 to move the focus lens 250 forward or backward in the optical axis direction A1.

[0047] The zoom lens driving unit 221 , the aperture driving unit 231 , the OIS processing unit 244 , and the focus lens driving unit 251 are controlled by a lens controller 210 .

[0048] The lens controller 210 controls the overall operation of the interchangeable lens 200 in accordance with control from the camera controller 110. The lens controller 210 includes a processor, and the processor executes instructions to realize predetermined functions. For example, the lens controller 210 may be realized by various processors such as a CPU, MPU, GPU, DSU, FPGA, or ASIC. The processor may be formed from a dedicated electronic circuit designed to realize predetermined functions. Furthermore, the lens controller 210 may be formed from one or more processors.

[0049] Furthermore, the lens controller 210 controls the zoom lens driving unit 221, the aperture driving unit 231, the OIS processing unit 244, and the focus lens driving unit 251 based on the information stored in the DRAM 211 and the flash memory 212. When controlling the zoom lens driving unit 221, the aperture driving unit 231, the OIS processing unit 244, and the focus lens driving unit 251, the lens controller 210 uses the DRAM 211 as a work memory.

[0050] The flash memory 212 stores programs, parameters, lens data, etc. used when controlling the lens controller 210. Here, lens data refers to the lens name, lens ID, serial number, F-number (aperture value), lens focal length, lens shooting distance, presence or absence of an electric zoom function, resolution characteristic information, characteristic values ​​specific to the interchangeable lens 200, etc. The lens data stored in the flash memory 212 is transmitted by the lens controller 210 to the camera controller 110. The camera controller 110 executes various control operations based on the lens data.

[0051] [About the filter module configuration] The filter module 150 will be described with reference to FIGS.

[0052] Figure 3 is a rear perspective view of the filter module, and Figure 4 is an exploded rear perspective view of the filter module.

[0053] As shown in FIGS. 3 and 4, in this embodiment, filter module 150 has housing 151, first filter unit 152, and second filter unit 153.

[0054] Housing 151 is made of a metal material such as aluminum die-cast, and supports first and second filter units 152 and 153. In this embodiment, housing 151 also includes protective glass 154 through which light from the subject passes.

[0055] 3, the image sensor 120 faces the protective glass 154 at a distance in the direction in which the optical axis LA of the image capturing device 10 extends (i.e., the front-to-rear direction (X-axis direction) of the image capturing device 10), and has an imaging surface 120a onto which light from a subject is incident. The optical axis LA is perpendicular to the imaging surface 120a of the image sensor 120 and passes through the center of the rectangular imaging surface 120a.

[0056] 3 and 4, in this embodiment, first filter unit 152 includes first optical filter 130 and a frame-shaped first frame structure 155 that supports the outer periphery of first optical filter 130. Second filter unit 153 includes second optical filter 131 and a second frame structure 156 that supports the outer periphery of second optical filter 131.

[0057] In this embodiment, the first and second optical filters 130 and 131 are rectangular, similar to the imaging surface 120a of the image sensor 120.

[0058] The first filter unit 152, i.e., the first frame structure 155 that supports the first optical filter 130, is supported by the housing 151 so as to be rotatable about a first rotation center line C1 that extends in the front-to-rear direction (X-axis direction) of the image capture device 10. The second filter unit 153, i.e., the second frame structure 156 that supports the second optical filter 131, is supported by the housing 151 so as to be rotatable about a second rotation center line C2 that extends in the front-to-rear direction of the image capture device 10.

[0059] 3 and 4, in this embodiment, the first and second rotational center lines C1 and C2 are aligned on the same straight line. Therefore, the first filter unit 152 rotates forward relative to the second filter unit 153. Since the first and second rotational center lines C1 and C2 are aligned on the same straight line, the first and second filter units 152 and 153 can be rotatably supported by a common support shaft 159.

[0060] 4, the filter module 150 has a first drive mechanism 160 that rotates the first filter unit 152 about a first rotation center line C1 and a second drive mechanism 161 that rotates the second filter unit 153 about a second rotation center line C2. The first drive mechanism 160 and the second drive mechanism 161 constitute the switching mechanism 134.

[0061] In this embodiment, the first and second drive mechanisms 160 and 161 are so-called rack and pinion mechanisms.

[0062] The first drive mechanism 160 includes a first rack 162 that extends in the left-right direction (Y-axis direction) of the imaging device 10 and is supported on the housing 151 so as to be movable in the left-right direction, and a first drive gear 163 that engages with the first rack 162 to move it in the left-right direction. The first rack 162 engages with a pinion portion 157 formed on a first frame structure 155 of the first filter unit 152. Rotation of the first drive gear 163 moves the first rack 162 in the left-right direction, causing the pinion portion 157 to rotate about a first rotation center line C1. As a result, the first filter unit 152 rotates about the first rotation center line C1.

[0063] The second drive mechanism 161 includes a second rack 164 that extends in the left-right direction (Y-axis direction) of the imaging device 10 and is supported on the housing 151 so as to be movable in the left-right direction, and a second drive gear 165 that engages with the second rack 164 to move it in the left-right direction. The second rack 164 extends rearward and parallel to the first rack 162. The second rack 164 also engages with a pinion portion 158 formed on a second frame structure 156 of the second filter unit 153. The rotation of the second drive gear 165 moves the second rack 164 in the left-right direction, causing the pinion portion 157 to rotate about a second rotation center line C2. As a result, the second filter unit 153 rotates about the second rotation center line C2.

[0064] In this way, the first filter unit 152 rotates about the first rotation center line C1 between the first filtering position and the first retracted position by the first drive mechanism 160. Also, the second filter unit 153 rotates about the second rotation center line C2 between the second filtering position and the second retracted position by the second drive mechanism 161.

[0065] Fig. 5A is a rear view of the filter module in a state where first filter unit 152 is located in the first filtering position and second filter unit 153 is located in the second retracted position. Fig. 5B is a rear view of the filter module in a state where first filter unit 152 is located in the first retracted position and second filter unit 153 is located in the second filtering position.

[0066] 5A, the first filter unit 152 is rotated by the first drive mechanism 160 and placed at the first filtering position. Specifically, when the first filter unit 152 is placed at the first filtering position, the first optical filter 130 is placed in front of the imaging surface 120a of the image sensor 120. As a result, light from the subject that passes through the protective glass 154 and before reaching the imaging surface 120a passes through the first optical filter 130. As a result, the light from the subject that has been filtered by the first optical filter 130 is incident on the imaging surface 120a.

[0067] 5B, first filter unit 152 is rotated by first drive mechanism 160 and placed in a first retracted position. Specifically, first filter unit 152 retracts to a position away from the front of imaging surface 120a of image sensor 120, which serves as the first retracted position. In the present embodiment, first filter unit 152 retracts to the left (as viewed from the front of imaging device 10) from the front of imaging surface 120a. This allows light from the subject to be incident on imaging surface 120a without being obstructed by first filter unit 152, i.e., without passing through first optical filter 130.

[0068] 5B, the second filter unit 153 is rotated by the second drive mechanism 161 and placed at the second filtering position. Specifically, when the second filter unit 153 is placed at the second filtering position, the second optical filter 131 is located in front of the imaging surface 120a of the image sensor 120. Light from the subject that passes through the protective glass 154 before reaching the imaging surface 120a passes through the second optical filter 131. As a result, the light from the subject that has been filtered by the second optical filter 131 is incident on the imaging surface 120a. The second filtering position is located rearward of the first filtering position.

[0069] 5A, the second filter unit 153 is rotated by the second drive mechanism 161 and placed in the second retracted position. Specifically, the second filter unit 153 retracts to a position away from the front of the imaging surface 120a of the image sensor 120, as the second retracted position. In the present embodiment, the second filter unit 153 retracts to the left (when viewed from the front of the imaging device 10) from the front of the imaging surface 120a. This allows light from the subject to be incident on the imaging surface 120a without being obstructed by the second filter unit 153, i.e., without passing through the second optical filter 131. The second retracted position is located rearward of the first retracted position.

[0070] In this embodiment, as shown in FIG. 5B , the first filter unit 152 is rotated substantially 90 degrees around the first rotation center line C1 by the first drive mechanism 160. Therefore, the positional relationship between the first filtering position and the first retracted position is such that the first filter unit 152 positioned at either the first filtering position or the first retracted position is rotated 90 degrees to be positioned at the other position. As a result, the orientation (two-dot chain line) of the first optical filter 130 (130′) of the first filter unit 152 positioned at the first filtering position differs by 90 degrees from the orientation (solid line) of the first optical filter 130 when positioned at the first retracted position. In other words, the longitudinal direction of the first optical filter 130 changes from the left-right direction (Y-axis direction) of the imaging device 10 to the height direction (Z-axis direction).

[0071] Furthermore, the first rotation center line C1 of the first filter unit 152 is positioned so that the first optical filter 130 (130') located at the first filtering position and the first optical filter 130 located at the first retracted position are as adjacent as possible without overlapping each other. For example, in the case of the present embodiment, the first rotation center line C1 is positioned near the lower left corner of the first optical filter 130 (130') when located at the first filtering position (when viewed from the front of the imaging device 10) without passing through the first optical filter 130.

[0072] Such a first rotation center line C1 can reduce the movement range of the first optical filter 130, i.e., the first filter unit 152, compared to when the first optical filter 130 moves parallel to the left-right direction (Y-axis direction) of the imaging device 10. As a result, it is possible to prevent the imaging device 10 from becoming larger, particularly in the left-right direction. In addition, it is possible to prevent a deterioration in the design of the imaging device 10 due to an increase in size in the left-right direction.

[0073] In this embodiment, as shown in FIG. 5B , the second filter unit 153 is rotated substantially 90 degrees around the second rotation center line C2 by the second drive mechanism 161. Therefore, the positional relationship between the second filtering position and the second retracted position is such that when the second filter unit 153 is positioned at one of the second filtering position and the second retracted position, it is positioned at the other position when rotated 90 degrees. As a result, the orientation (solid line) of the second optical filter 131 of the second filter unit 153 positioned at the second filtering position differs by 90 degrees from the orientation (two-dot chain line) of the second optical filter 131 (131′) when positioned at the second retracted position. In other words, the longitudinal direction of the second optical filter 131 changes from the left-right direction (Y-axis direction) of the imaging device 10 to the height direction (Z-axis direction).

[0074] Furthermore, the second rotation center line C2 of the second filter unit 153 is positioned so that the second optical filter 131 located at the second filtering position and the second optical filter 131 (131') located at the second retracted position are as adjacent as possible without overlapping each other. For example, in the case of this embodiment, the second rotation center line C2 is positioned so as not to pass through the second optical filter 131 and near the lower left corner of the second optical filter 131 when located at the second filtering position (when viewed from the front of the imaging device 10).

[0075] Such a second rotation center line C2 can reduce the movement range of the second optical filter 131, i.e., the second filter unit 153, compared to when the second optical filter 131 moves parallel to the left-right direction (Y-axis direction) of the imaging device 10. As a result, it is possible to prevent the imaging device 10 from becoming larger, particularly in the left-right direction. In addition, it is possible to prevent a deterioration in the design of the imaging device 10 due to an increase in size in the left-right direction.

[0076] The second filter unit 153 also rotates substantially 90 degrees like the first filter unit 152, and therefore does not significantly affect the design of the imaging device 10 compared to when it moves parallel to the left and right directions (Y-axis direction) or height directions (Z-axis direction) of the imaging device 10.

[0077] In this embodiment, the rotational movement of first filter unit 152 by first drive mechanism 160 and the rotational movement of second filter unit 153 by second drive mechanism 161 are synchronized.

[0078] Specifically, as shown in Fig. 5A, the rotational movements of the first and second filter units 152, 153 are synchronized so that when the first filter unit 152 is located at the first filtering position (i.e., a position in front of the imaging surface 120a of the image sensor 120), the second filter unit 153 is located at the second retracted position (i.e., a position away from the front of the imaging surface 120a). Also, as shown in Fig. 5B, the rotational movements of the first and second filter units 152, 153 are synchronized so that when the first filter unit 152 is located at the first retracted position, the second filter unit 153 is located at the second filtering position. To achieve this, the first drive mechanism 160 and the second drive mechanism 161 are synchronized.

[0079] 3 and 4, in this embodiment, a first drive gear 163 of the first drive mechanism 160 and a second drive gear 165 of the second drive mechanism 161 are engaged with each other. The second drive gear 165 is engaged with a power transmission gear 166, which is a power source that supplies power to the first drive mechanism 160 and the second drive mechanism 161. The power transmission gear 166 is disposed on the front surface of the imaging device 10, and is connected to a rotation knob 167 that is rotated by the user.

[0080] 5A, when the user rotates the rotary knob 167, the power transmission gear 166 rotates, causing the first drive gear 163 and the second drive gear 165 to rotate synchronously. As a result, the first rack 162 engaged with the first drive gear 163 moves to the right (when viewed from the front of the imaging device 10), and the second rack 164 engaged with the second drive gear 165 moves in the opposite direction, i.e., to the left. As the first rack 162 and the second rack 164 move in the opposite directions, the first filter unit 152 and the second filter unit 153 rotate in the opposite directions.

[0081] FIG. 6 is a schematic diagram of the detection mechanism.

[0082] 6, the detection mechanism 135 includes first to fourth electrical contact portions 170, 171, 173, and 174. The first filter unit 152 and the second filter unit 153 are provided with the first electrical contact portion 170 and the second electrical contact portion 171, respectively. Specifically, the first electrical contact portion 170 is provided on the bottom surface of the first frame structure 155. The second electrical contact portion 171 is provided on the bottom surface of the second frame structure 156.

[0083] The filter module 150 also includes a contact base 172 having a contact surface 172a that contacts the first and second filter units 152 and 153. A third electrical contact portion 173 and a fourth electrical contact portion 174 are provided on the contact surface 172a of the contact base 172. The third electrical contact portion 173 is in contact with and electrically connected to the first electrical contact portion 170 when the first filter unit 152 is located in the first filtering position. The third electrical contact portion 173 is not in contact with and electrically connected to the first electrical contact portion 170 when the first filter unit 152 is located in the first retracted position. The fourth electrical contact portion 174 is in contact with and electrically connected to the second electrical contact portion 171 when the second filter unit 153 is located in the second filtering position. The fourth electrical contact portion 174 is not in contact with and electrically connected to the second electrical contact portion 171 when the second filter unit 153 is located in the second retracted position.

[0084] The first to fourth electrical contact portions 170, 171, 173, and 174 are formed of, for example, a conductive material such as copper. The first to fourth electrical contact portions 170, 171, 173, and 174 are, for example, electrodes.

[0085] The detection mechanism 135 detects whether the first electrical contact 170 and the third electrical contact 173 are electrically connected, and whether the second electrical contact 171 and the fourth electrical contact 174 are electrically connected. The camera controller 110 determines whether the state is a first state or a second state based on the presence or absence of electrical connections among the first to fourth electrical contacts 170, 171, 173, and 174 detected by the detection mechanism 135. Specifically, when the first electrical contact 170 and the third electrical contact 173 are electrically connected, the camera controller 110 determines that the state is a first state in which the first optical filter 130 is located at the first filtering position. When the second electrical contact 171 and the fourth electrical contact 174 are electrically connected, the camera controller 110 determines that the state is a second state in which the second optical filter 131 is located at the second filtering position.

[0086] Next, the focus deviation caused by switching between the optical filters 130 and 131 will be described with reference to FIGS. 7A and 7B.

[0087] Fig. 7A is a schematic diagram of the optical path in the first optical filter 130, and Fig. 7B is a schematic diagram of the optical path in the second optical filter 131. In Fig. 7A and Fig. 7B, the first optical filter 130 is adjusted to a position where it is in focus when it is in use.

[0088] As shown in FIG. 7A, light L10 transmitted through the first optical filter 130 is collected on the imaging surface 120a of the image sensor 120.

[0089] In this embodiment, the first optical filter 130 is clear glass, and the second optical filter 131 is an ND filter. That is, the refractive index n2 and thickness t2 of the second optical filter 131 are greater than the refractive index n1 and thickness t1 of the first optical filter 130.

[0090] 7B, when the first optical filter 130 is switched to the second optical filter 131, the refraction angle of light L20 passing through the second optical filter 131 and the optical path within the filter become larger than those of light L10, and the light is focused at a position shifted from the imaging surface 120a of the image sensor 120. That is, by switching from the first optical filter 130 to the second optical filter 131, a focus error G1 occurs between the focusing positions of light L10 and light L20. Specifically, the focusing position of light L20 shifts in the far direction from the focusing position of light L10.

[0091] For example, when a focus error G1 occurs due to switching of an optical filter, the focus lens 250 is driven to eliminate the focus error G1.

[0092] 8A and 8B are schematic diagrams for explaining adjustment of the shooting distance caused by focus deviation G1 due to switching of an optical filter. In Fig. 8A and Fig. 8B, symbols E1 and E2 indicate the drive limits of the focus lens 250, symbol E1 indicating the drive end in the near direction, and symbol E2 indicating the drive end in the far direction.

[0093] As shown in FIG. 8A, when the first optical filter 130 is in use, the focus lens 250 is positioned at the driving end E1, and the focal position P1 is aligned with the subject 300.

[0094] When the focus state is changed from the first optical filter 130 to the second optical filter 131, a defocus G1 occurs as shown in Fig. 8B. This causes the focal position P1 to shift from the subject 300. For example, the occurrence of the defocus G1 in the far direction causes the focal position P1 to shift from the subject 300 in the far direction. In other words, the defocus G1 causes a defocus G2.

[0095] In this case, the focus lens 250 is driven to eliminate the focus deviation G1 using an autofocus function or the like. However, when the focus lens 250 is located at the drive end E1, the focus lens 250 cannot be driven in the Near direction. Therefore, the focal position P1 cannot be aligned with the subject 300.

[0096] As described above, when switching from the first optical filter 130 to the second optical filter 131, a range in which the shooting distance cannot be adjusted arises. For this reason, the imaging device 10 of the present disclosure displays information on the LCD monitor 103 regarding the shooting distance that can be set in response to switching of the light conditions using the optical filters 130 and 131. This notifies the user that there is a shooting distance that cannot be set in response to switching of the light conditions.

[0097] [Operation] The operation of the imaging device according to the first embodiment of the present disclosure, that is, a method for controlling the imaging device, will be described with reference to Fig. 9. Fig. 9 is a schematic flowchart of the method for controlling the imaging device according to the first embodiment of the present disclosure.

[0098] The process shown in FIG. 9 starts, for example, when the first optical filter 130 or the second optical filter 131 is switched.

[0099] 9, in step S10, camera controller 110 determines whether the camera is in the first state or the second state. Specifically, detection mechanism 135 detects whether first optical filter 130 is located at the first filtering position or whether second optical filter 131 is located at the second filtering position. Camera controller 110 determines whether the camera is in the first state or the second state based on the detection result of detection mechanism 135.

[0100] If it is in the first state, the process proceeds to step S20. If it is in the second state, the process proceeds to step S30.

[0101] In step S20, camera controller 110 determines a first range of the shooting distance that can be set in the first state. The first range is stored in flash memory 111. Camera controller 110 obtains the first range from flash memory 111 and determines it.

[0102] The first range is a range of shooting distances that can be set when capturing an image using the first optical filter 130. In the present embodiment, since the first optical filter 130 is clear glass, the first range is determined to be, for example, a range of 0.1 to infinity.

[0103] In step S21, the camera controller 110 displays on the liquid crystal monitor 103 first information indicating the first range.

[0104] In step S30, camera controller 110 determines a second range of the shooting distance that can be set in the second state. The second range is stored in flash memory 111. Camera controller 110 obtains the second range from flash memory 111 and determines it.

[0105] The second range is a range of shooting distances that can be set when capturing an image using the second optical filter 131. In the present embodiment, the second optical filter 131 is an ND filter, so the second range is determined to be, for example, a range of 0.5 to ∞. When the second optical filter 131 is used, the image will not be in focus at shooting distances of less than 0.5.

[0106] In step S31, the camera controller 110 displays on the liquid crystal monitor 103 second information indicating the second range.

[0107] It should be noted that steps S20 and S30 are not essential steps in the control method. For example, step S21 or step S31 may be performed after step S10.

[0108] The first information and the second information include at least one of a number, a letter, a picture, and a bar related to the shooting distance.

[0109] FIG. 10A is a schematic diagram of an example of a display on the LCD monitor 103 in the first state, and FIG. 10B is a schematic diagram of an example of a display on the LCD monitor 103 in the second state.

[0110] 10A, the first marking 140 includes bars, numbers, and letters that indicate a first range of the shooting distance that can be set when using the first optical filter 130. In this embodiment, the first marking 140 includes numbers and letters representing shooting distances of 0.1 to ∞ (m), and bars.

[0111] 10B, the second information 141 includes bars, numbers, and letters that indicate a second range of the shooting distance that can be set when using the second optical filter 131. In this embodiment, the second information 141 includes numbers and letters representing shooting distances of 0.5 to ∞ (m), and bars.

[0112] FIG. 11A is a schematic diagram of another example of the display on the LCD monitor in the first state, FIG. 11B is a schematic diagram of another example of the display on the LCD monitor in the second state, and FIG. 11C is a schematic diagram of another example of the display on the LCD monitor in the second state.

[0113] 11A and 11B, the first marking 140 and the second marking 141 may include a bar and a picture. For example, the picture is a picture indicating the upper and lower limits of the shooting distance.

[0114] 11C, the second marking 141 may include bars, numbers, and pictures. Similarly, the first marking 140 may include bars, numbers, and pictures.

[0115] [effect] The imaging device 10 according to the first embodiment of the present disclosure can achieve the following effects.

[0116] The imaging device 10 of the present disclosure includes an image sensor (imaging element) 120, a switching mechanism 134, a liquid crystal monitor (display device) 103, and a camera controller (processor) 110. The image sensor 120 has an imaging surface 120a onto which light from a subject is incident. The switching mechanism 134 switches between a first state and a second state different from the first state by changing the state of light incident on the imaging surface 120a using optical filters 130 and 131. The liquid crystal monitor 103 displays information. The camera controller 110 controls the image sensor 120, the switching mechanism 134, and the liquid crystal monitor 103. The camera controller 110 determines whether the state is the first state or the second state. If the state is the first state, the camera controller 110 causes the liquid crystal monitor 103 to display first information 140 indicating a first range of the shooting distance that can be set in the first state. When in the second state, the camera controller 110 causes the liquid crystal monitor 103 to display second information 141 that indicates a second range of the shooting distance that can be set in the second state.

[0117] This configuration allows information about the settable focusing distance to be displayed in response to switching of the light state using the optical filters 130 and 131. The optical filters 130 and 131 may have different refractive indices and / or thicknesses. Therefore, switching of the optical filters 130 and 131 may result in focus deviation G1. In this case, if the focus lens 250 is positioned at the drive end E1, the focusing distance cannot be adjusted. The imaging device 10 of the present disclosure can display the adjustable range of the focusing distance on the LCD monitor 103 in response to the first or second state. This allows the user to easily grasp the settable focusing distance in response to the first or second state.

[0118] The first information and the second information include at least one of numbers, letters, pictures, and bars related to the shooting distance, which allows the user to easily know the range of the shooting distance.

[0119] The optical filters include a first optical filter 130 and a second optical filter 131 having a refractive index or thickness different from that of the first optical filter 130. The first state is a state in which the state of light is changed by the first optical filter 130, and the second state is a state in which the state of light is changed by the second optical filter 131. With this configuration, it is possible to display information about the settable shooting distance in response to switching of the state of light using the optical filters 130 and 131.

[0120] Furthermore, by controlling the refractive index or thickness of the first optical filter 130 and the second optical filter 131, the direction of the defocus G1 can be controlled.

[0121] As an example, in the manufacturing process of the imaging device 10, adjustment may be made so that the back focus is aligned with the imaging surface 120a of the image sensor 120, with the first optical filter 130 disposed in front of the imaging surface 120a. In this case, if the refractive index n2 or thickness t2 of the second optical filter 131 is greater than the refractive index n1 or thickness t1 of the first optical filter 130, a focus error G1 may occur in the far direction when switching from the first optical filter 130 to the second optical filter 131.

[0122] As another example, in the manufacturing process of the imaging device 10, adjustment may be made so that the back focus is aligned with the imaging surface 120a of the image sensor 120 with the second optical filter 131 disposed in front of the imaging surface 120a. In this case, if the refractive index n2 or the thickness t2 of the second optical filter 131 is greater than the refractive index n1 or the thickness t1 of the first optical filter 130, a focus error G1 can occur in the near direction when switching from the second optical filter 131 to the first optical filter 130.

[0123] The switching mechanism 134 includes a drive mechanism that moves the optical filters 130, 131 between a filtering position and a retracted position. The filtering position is a position where the optical filters 130, 131 are disposed in front of the imaging surface 120a of the image sensor 120, and light before reaching the imaging surface 120a passes through the optical filters 130, 131. The retracted position is a position where the optical filters 130, 131 are removed from in front of the imaging surface 120a. With this configuration, the optical filters 130, 131 can be switched between a first state and a second state by moving the optical filters 130, 131 between the filtering position and the retracted position.

[0124] The imaging device 10 includes a detection mechanism 135 that detects the first state and the second state. Determining whether the imaging device 10 is in the first state or the second state includes detecting the first state and the second state by the detection mechanism 135. With this configuration, the first state and the second state can be easily detected.

[0125] The control method, program, and computer-readable storage medium for an imaging device according to the first embodiment of the present disclosure achieve the same effects as those of the imaging device 10 described above.

[0126] (Embodiment 2) An imaging device according to a second embodiment of the present disclosure will be described.

[0127] In the second embodiment, differences from the first embodiment will be mainly described. In the second embodiment, the same or equivalent configurations as those in the first embodiment will be denoted by the same reference numerals. Also, in the second embodiment, descriptions that overlap with those in the first embodiment will be omitted.

[0128] Fig. 12 is a flowchart of a process for determining a first range in a control method for an imaging device according to Embodiment 2 of the present disclosure. Fig. 13 is a flowchart of a process for determining a second range in a control method for an imaging device according to Embodiment 2 of the present disclosure.

[0129] The second embodiment differs from the first embodiment in that the first range and the second range are determined based on the shooting distance of the optical filters 130 and 131 and the lens shooting distance of the interchangeable lens 200.

[0130] Fig. 12 shows the process of step S20 for determining the first range. As shown in Fig. 12, step S20 includes steps S20A to S20C.

[0131] In step S20A, camera controller 110 acquires information about a first shooting distance limited in the first state. The first shooting distance is a shooting distance limited by first optical filter 130. For example, information about the first shooting distance is stored in flash memory 111 of camera body 100. Camera controller 110 acquires the information about the first shooting distance from flash memory 111.

[0132] In step 20B, the camera controller 110 acquires information about the lens shooting distance of the interchangeable lens 200. The lens shooting distance is a shooting distance limited by the interchangeable lens 200. For example, the information about the lens shooting distance is stored in the flash memory 212 of the interchangeable lens 200. The camera controller 110 acquires the information about the lens shooting distance from the flash memory 212.

[0133] In step 20C, camera controller 110 determines a first range based on the first shooting distance and the lens shooting distance. For example, camera controller 110 compares the first shooting distance with the lens shooting distance, and determines the range of shooting distances that overlaps the first shooting distance and the lens shooting distance as the first range. For example, if the first shooting distance is 0.1 to ∞ and the lens shooting distance is 1 to ∞, the first range is determined to be 1 to ∞.

[0134] Fig. 13 shows the process of step S30 for determining the second range. As shown in Fig. 13, step S30 includes steps S30A to S30C.

[0135] In step S30A, camera controller 110 acquires information about a second shooting distance limited in the second state. The second shooting distance is a shooting distance limited by second optical filter 131. For example, information about the second shooting distance is stored in flash memory 111 of camera body 100. Camera controller 110 acquires the information about the second shooting distance from flash memory 111.

[0136] In step S30B, the camera controller 110 acquires information about the lens shooting distance of the interchangeable lens 200. Step S30B is similar to step S20B, and therefore a description thereof will be omitted.

[0137] In step 30C, camera controller 110 determines a second range based on the second shooting distance and the lens shooting distance. For example, camera controller 110 compares the second shooting distance with the lens shooting distance, and determines the range of shooting distances that overlap between the second shooting distance and the lens shooting distance as the second range. For example, if the second shooting distance is 2 to ∞ and the lens shooting distance is 1 to ∞, the second range is determined to be 2 to ∞.

[0138] In addition, if it is known in advance that the lens shooting distance is greater than the first shooting distance and the second shooting distance, the camera controller 110 may determine the first range or the second range based on the first shooting distance or the second shooting distance rather than based on the lens shooting distance.

[0139] [effect] The imaging device 10 according to the second embodiment of the present disclosure can achieve the following effects.

[0140] In the imaging device 10 of the present disclosure, when the camera controller 110 is in the first state, it determines the first range based on information about a first shooting distance limited in the first state. When the camera controller 110 is in the second state, it determines the second range based on information about a second shooting distance limited in the second state. With this configuration, it is possible to easily determine the range of shooting distances that can be set in response to switching of the light state using the optical filters 130 and 131.

[0141] Camera controller 110 acquires information about the lens shooting distance of the attached interchangeable lens 200. Determining the first range includes determining the first range based on the first shooting distance and the lens shooting distance. Determining the second range includes determining the second range based on the second shooting distance and the lens shooting distance. With this configuration, the range of settable shooting distances can be easily determined based on switching of light conditions using optical filters 130 and 131 and the lens shooting distance of interchangeable lens 200.

[0142] (Embodiment 3) An imaging device according to a third embodiment of the present disclosure will be described.

[0143] In the third embodiment, differences from the first embodiment will be mainly described. In the third embodiment, the same or equivalent configurations as those in the first embodiment will be denoted by the same reference numerals. Also, in the third embodiment, descriptions that overlap with those in the first embodiment will be omitted.

[0144] FIG. 14 is a schematic flowchart of a control method for an imaging device according to a third embodiment of the present disclosure. is.

[0145] The third embodiment differs from the first embodiment in that the display on the liquid crystal monitor 103 is changed when the set shooting distance is outside the first range or the second range.

[0146] 14, the control method for the imaging device of this embodiment includes steps S10 to S42. Steps S10 to S31 are the same as those in the first embodiment, and therefore a description thereof will be omitted.

[0147] In step S40, the camera controller 110 determines whether the set shooting distance is outside the first range or the second range. For example, the lens controller 210 of the interchangeable lens 200 acquires drive information of the focus lens drive unit 251. The lens controller 210 transmits the drive information to the camera controller 110. The camera controller 110 receives the drive information and calculates the set shooting distance based on the drive information. In the first state, the camera controller 110 determines whether the set shooting distance is outside the first range. In the second state, the camera controller 110 determines whether the set shooting distance is outside the second range.

[0148] In the first or second state, if the set shooting distance is outside the first or second range, the process proceeds to step S41. If the set shooting distance is not outside the first or second range, the process ends.

[0149] In step S41, camera controller 110 changes the display on LCD monitor 103. For example, camera controller 110 displays a message on the screen of LCD monitor 103. The message includes content relating to the fact that the set shooting distance is outside the first range or the second range.

[0150] Alternatively, camera controller 110 may change the screen of LCD monitor 103 to an image. For example, the image may be an image displayed in a single color such as black, white, red, yellow, or blue, or an image displayed in multiple colors. Alternatively, the image may be an image including a picture, photograph, or text indicating a warning.

[0151] In step S42, camera controller 110 adjusts the shooting distance to within the first range or the second range. For example, camera controller 110 sends a command to lens controller 210 to move focus lens 250 in order to adjust the shooting distance by driving focus lens 250. Lens controller 210 controls focus lens driving unit 251 based on the command to drive focus lens 250. As a result, in the first state, the shooting distance is adjusted to within the first range. In the second state, the shooting distance is adjusted to within the second range.

[0152] Fig. 15 is a schematic diagram showing an example of a change in display on the LCD monitor 103 when the first state is switched to the second state and the set shooting distance is outside the second range.

[0153] As shown in FIG. 15, if the set shooting distance is outside the second range, a message M1 is displayed on the LCD monitor 103 and the set shooting distance is adjusted to be within the second range.

[0154] 15, the second range is 0.5 to infinity, so camera controller 110 displays message M1 saying, "The shortest shooting distance when the second optical filter is set is 0.5 m." Furthermore, camera controller 110 adjusts the shooting distance to 0.5 m, which is the shortest shooting distance.

[0155] Note that message M1 is not limited to the above example, and may be a message relating to the fact that the set shooting distance is outside the first range or the second range. For example, message M1 may be "The shooting distance cannot be adjusted" or "The settable shooting distance range is 0.5 to infinity."

[0156] Furthermore, in the control method for an imaging device according to this embodiment, step S42 is not an essential step, and for example, step S42 does not have to be performed.

[0157] [effect] The imaging device 10 according to the third embodiment of the present disclosure can achieve the following effects.

[0158] In the imaging device 10 of the present disclosure, when the set shooting distance is outside the first range in the first state, or when the set shooting distance is outside the second range in the second state, the camera controller 110 changes the display on the LCD monitor 103. With this configuration, it is possible to notify the user that the set shooting distance is outside the first range or the second range.

[0159] Changing the display on the LCD monitor 103 includes displaying a message M1 on the LCD monitor 103. With this configuration, it is possible to easily notify the user that the set shooting distance is outside the first range or the second range.

[0160] In the first state, if the set shooting distance is outside the first range, camera controller 110 adjusts the shooting distance to be within the first range. In the second state, if the set shooting distance is outside the second range, camera controller 110 adjusts the shooting distance to be within the second range. With this configuration, when the set shooting distance is outside the first range or the second range, the shooting distance can be automatically adjusted to be within the first range or the second range.

[0161] As described above, the above-described embodiments have been described as examples of the technology of the present disclosure. For this purpose, drawings and detailed descriptions are provided. Therefore, the components described in the drawings and detailed descriptions may include not only components essential for solving the problem, but also components that are not essential for solving the problem in order to exemplify the above-described technology. Therefore, the fact that these non-essential components are described in the drawings or detailed descriptions should not be interpreted as immediately indicating that these non-essential components are essential.

[0162] Furthermore, since the above-described embodiments are intended to illustrate the technology of the present disclosure, various modifications, substitutions, additions, omissions, etc. may be made within the scope of the claims or their equivalents.

[0163] Furthermore, the above-described embodiments may be realized by an apparatus, a system, a method, a computer program, a computer-readable storage medium, and combinations thereof.

[0164] In the above embodiment, an example has been described in which the first optical filter 130 is clear glass and the second optical filter 131 is an ND filter, but this is not limiting. For example, the first and second optical filters 130 and 131 may be clear glass, ND filters, electronic filters, or the like.

[0165] In the above-described embodiment, an example has been described in which the first optical filter 130 and the second optical filter 131 are filters that change the transmittance of light, but this is not limiting. The first optical filter 130 and the second optical filter 131 may be any filter that changes the state of light. The first optical filter 130 and the second optical filter 131 may be a filter that transmits only light of a specific vibration direction, a filter used to suppress false colors and moire, a filter that cuts ultraviolet or ultraviolet light, a filter used to emphasize a specific color, a filter used to emphasize a light source, or a filter used to blur light. For example, the first optical filter 130 and the second optical filter 131 may be a polarizing plate, an optical low-pass filter, a UV filter, an IR filter, a color filter, a cross filter, a soft focus filter, or the like.

[0166] In the above-described embodiment, an example in which the imaging device 10 includes two optical filters 130 and 131 has been described, but this is not limiting. The imaging device 10 may include one or more optical filters. For example, if the imaging device 10 includes one ND filter, the first state may be a state in which light is incident directly on the imaging surface 120a without passing through the optical filter. The second state may be a state in which the ND filter is located at a filtering position. That is, the second state may be a state in which light is incident on the imaging surface 120a after passing through the ND filter. Alternatively, the imaging device 10 may include three or more optical filters, including clear glass, ND filters, or electronic filters.

[0167] In the above embodiment, an example has been described in which the switching mechanism 134 is realized by the rack-and-pinion mechanism of the first and second drive mechanisms 160, 161, but this is not limiting. For example, the switching mechanism 134 may be realized by another drive mechanism. For example, the switching mechanism 134 may switch between the first optical filter 130 and the second optical filter 131 by moving them vertically or horizontally.

[0168] In the above embodiment, an example has been described in which the detection mechanism 135 detects the state based on the presence or absence of electrical connection between the first to fourth electrical contact portions 170, 171, 173, and 174. However, the present invention is not limited to this. For example, the detection mechanism 135 may detect the state by detecting the positions of the optical filters 130 and 131 using a push switch, a capacitance sensor, a magnetic sensor, or the like.

[0169] In the above embodiment, an example in which the camera controller 110 executes each process has been described, but this is not limiting. For example, at least some of the processes described above may be executed by the lens controller 210.

[0170] In the above embodiment, an example of the interchangeable lens 200 has been described, but the present invention is not limited to this. For example, the imaging device 10 may be an integrated lens camera in which a lens unit and a camera body 100 are integrated together.

[0171] In the above embodiment, an example has been described in which the adjustment of the shooting distance is achieved by driving the focus lens 250, but this is not limiting. For example, the adjustment of the shooting distance may be achieved by driving the image sensor 120 in the optical axis direction L1.

[0172] In the above embodiment, an example has been described in which the LCD monitor 103 is disposed on the rear surface of the camera body 100, but this is not limiting. For example, the LCD monitor 103 may be disposed on the top surface and / or side surface of the camera body 100.

[0173] In the above embodiment, an example has been described in which the first range and the second range are stored in flash memory 111 of camera body 100, but this is not limiting. For example, the first filter unit and the second filter unit may each have a memory, and the memory may store the first range and the second range.

[0174] The following describes modified examples.

[0175] (Variation 1) FIG. 16 is a schematic diagram for explaining an imaging device according to the first modification.

[0176] 16, the imaging device 10 according to the first modification may include three optical filters 130, 131, and 132. The imaging device 10 according to the first modification can switch between first to third light states using the first to third optical filters 130, 131, and 132. For example, the first optical filter 130 may be clear glass, the second optical filter 131 may be an ND filter with a first transmittance, and the third optical filter 132 may be an ND filter with a second transmittance. The first transmittance and the second transmittance are different transmittances.

[0177] In the first modification, the combination of the first to third optical filters 130, 131, and 132 is not limited to this.

[0178] (Variation 2) 17A is a block diagram showing a schematic configuration of a first filter unit according to Modification 2. FIG. 17B is a block diagram showing a schematic configuration of a second filter unit according to Modification 2. FIG.

[0179] 17A, a first filter unit 152 according to Modification 2 may include a first filter memory 136 in addition to the first optical filter 130. The first filter memory 136 may store information about a first range of the shooting distance limited by the first optical filter 130.

[0180] 17B, ​​the second filter unit 153 according to the second modification may include a second filter memory 137 in addition to the second optical filter 131. The second filter memory 137 may store information on a second range of the shooting distance limited by the second optical filter 131.

[0181] In the first state, camera controller 110 may acquire information about the first range from first filter memory 136. Camera controller 110 may also acquire information about the second range from second filter memory 137. In this case, the information about the first range and the second range does not have to be stored in flash memory 111 of camera body 100.

[0182] (Variation 3) FIG. 18 is a schematic diagram for explaining an imaging device according to the third modification.

[0183] 18, the imaging device 10 according to the third modification is different from the first embodiment in that the switching mechanism 134 includes an insertion mechanism 190 that inserts the first and second optical filters 130, 131 into the filtering position. The other configurations of the third modification are the same as those of the imaging device 10 according to the first embodiment.

[0184] The insertion mechanism 190 inserts the first and second optical filters 130, 131 into the filtering position. In the insertion mechanism 190, the first and second filter units 152, 153 provided with the first and second optical filters 130, 131 can be inserted into the filtering position.

[0185] The camera body 100 of the imaging device 10 is provided with an insertion hole 191 into which the first filter unit 152 or the second filter unit 153 can be inserted. The first filter unit 152 or the second filter unit 153 is placed inside the imaging device 10 through the insertion hole 191. This places the first optical filter 130 or the second optical filter 131 in the filtering position.

[0186] After the first filter unit 152 and the second filter unit 153 are inserted into the insertion hole 191, they can be removed from the insertion hole 191. This allows the first optical filter 130 and the second optical filter 131 to be placed in the filtering position and retracted from the filtering position.

[0187] In Modification 3, either the first filter unit 152 or the second filter unit 153 is inserted into the insertion hole 191. Therefore, when the first filter unit 152 is inserted into the insertion hole 191, the first optical filter 130 is disposed at the filtering position. When the second filter unit 153 is inserted into the insertion hole 191, the second optical filter 131 is disposed at the filtering position. By inserting or removing the first filter unit 152 and the second filter unit 153, the first optical filter 130 and the second optical filter 131 are disposed at the same filtering position.

[0188] The insertion mechanism 190 may include a positioning mechanism for positioning the first optical filter 130 or the second optical filter 131 at the filtering position. The positioning mechanism includes, for example, a positioning hole or a protrusion.

[0189] Furthermore, the insertion mechanism 190 may include rails or guides that allow the first filter unit 152 and the second filter unit 153 to slide.

[0190] Note that in the insertion mechanism 190, the first optical filter 130 and the second optical filter 131 may be disposed at different filtering positions. For example, the insertion mechanism 190 may insert the first optical filter 130 into a first filtering position and the second optical filter 131 into a second filtering position different from the first filtering position. The first filtering position may be farther from the imaging surface of the imaging element than the second filtering position. Specifically, the insertion mechanism 190 may be provided with a first insertion hole into which the first filter unit 152 can be inserted and a second insertion hole into which the second filter unit 153 can be inserted. The second insertion hole is provided farther from the imaging surface of the imaging element than the first insertion hole.

[0191] The above-described embodiment and modified example may be combined.

[0192] (Outline of the embodiment) (1) The imaging device of the present disclosure comprises an imaging element having an imaging surface onto which light from a subject is incident; a switching mechanism that switches between a first state and a second state different from the first state by changing the state of the light incident on the imaging surface using an optical filter; a display device that displays information; and a processor that controls the imaging element, the switching mechanism, and the display device, wherein the processor determines whether the imaging element is in the first state or the second state, and, if the imaging element is in the first state, causes the display device to display first information indicating a first range of shooting distances that can be set in the first state, and, if the imaging element is in the second state, causes the display device to display second information indicating a second range of shooting distances that can be set in the second state.

[0193] (2) In the imaging device of (1), the first information and the second information may include at least one of a number, a letter, a picture, and a bar related to a shooting distance.

[0194] (3) In the imaging device of (1) or (2), the processor may change the display of the display device when the set shooting distance in the first state is outside the first range, or when the set shooting distance in the second state is outside the second range.

[0195] (4) In the imaging device of (3), changing the display on the display device may include displaying a message on the display device.

[0196] (5) In any of the imaging devices (1) to (4), the processor may adjust the shooting distance to within the first range if the set shooting distance is outside the first range in the first state, and may adjust the shooting distance to within the second range if the set shooting distance is outside the second range in the second state.

[0197] (6) In any of the imaging devices (1) to (5), the optical filter may include a first optical filter and a second optical filter having a refractive index or thickness different from that of the first optical filter, and the first state may be a state in which the state of the light is changed by the first optical filter, and the second state may be a state in which the state of the light is changed by the second optical filter.

[0198] (7) In the imaging device of (6), the second optical filter may have a refractive index or a thickness greater than that of the first optical filter.

[0199] (8) In any of the imaging devices (1) to (7), when the imaging device is in the first state, the processor may determine the first range based on information about a first shooting distance that is limited in the first state, and when the imaging device is in the second state, the processor may determine the second range based on information about a second shooting distance that is limited in the second state.

[0200] (9) The imaging device of (8) may further include a filter unit including the optical filter and a filter memory that stores information about a shooting distance limited by the optical filter, and the optical filter may include a first optical filter and a second optical filter that has a refractive index or thickness different from that of the first optical filter, the first state may be a state in which the state of light is changed by the first optical filter, and the second state may be a state in which the state of light is changed by the second optical filter, the filter memory may include a first filter memory that stores information about the first shooting distance limited by the first optical filter and a second filter memory that stores information about the second shooting distance limited by the second optical filter, and determining the first range may include obtaining information about the first shooting distance from the first filter memory, and determining the second range may include obtaining information about the second shooting distance from the second filter memory.

[0201] (10) In the imaging device of (8) or (9), the processor may acquire information on the lens shooting distance of the interchangeable lens attached, and determining the first range may determine the first range based on the first shooting distance and the lens shooting distance, and determining the second range may determine the second range based on the second shooting distance and the lens shooting distance.

[0202] (11) In any of the imaging devices (1) to (10), the switching mechanism may include a drive mechanism that moves the optical filter between a filtering position and a retracted position, the filtering position may be a position where the optical filter is positioned in front of the imaging surface of the imaging element and the light passes through the optical filter before reaching the imaging surface, and the retracted position may be a position where the optical filter is removed from in front of the imaging surface.

[0203] (12) In any of the imaging devices (1) to (10), the switching mechanism may include an insertion mechanism that inserts and removes the optical filter to a filtering position, and the filtering position may be a position where the optical filter is disposed in front of the imaging surface of the imaging element and the light passes through the optical filter before reaching the imaging surface.

[0204] (13) Any of the imaging devices (1) to (12) may further include a detection mechanism that detects the first state and the second state, and determining whether the imaging device is in the first state or the second state may include detecting the first state and the second state using the detection mechanism.

[0205] (14) The control method for an imaging device disclosed herein is a control method for an imaging device that includes an imaging element having an imaging surface onto which light from a subject is incident, a switching mechanism that switches between a first state and a second state different from the first state by changing the state of the light incident on the imaging surface using an optical filter, and a display device that displays information, and includes the steps of: determining whether the imaging device is in the first state or the second state; if the imaging device is in the first state, causing the display device to display first information indicating a first range of shooting distances that can be set in the first state; and if the imaging device is in the second state, causing the display device to display second information indicating a second range of shooting distances that can be set in the second state.

[0206] (15) The program disclosed herein causes a processor to execute the control method of (14).

[0207] (16) A computer-readable storage medium according to the present disclosure stores a program for causing a processor to execute the control method of (14). [Industrial Applicability]

[0208] The imaging device of the present disclosure is applicable to imaging devices that switch the state of light using an optical filter. [Explanation of symbols]

[0209] 10. Imaging device 100 camera body 101 Body Mount 102 Release button 103 LCD monitor 104 Memory Card 105 card slots 106 Power supply 110 Camera Controller 111 Flash Memory 112 DRAM 113 Timing Generator 114 Analog-to-Digital Conversion Circuit 120 image sensors 120a imaging surface 130 First Optical Filter 131 Second Optical Filter 132 Third Optical Filter 134 Switching Mechanism 135 Detection mechanism 136 First filter memory 137 Second filter memory 140 1st information 141 Second information 150 Filter Module 151 Case 152 First filter unit 153 Second filter unit 154 Protective Glass 155 First frame structure 156 Second frame structure 157 Pinion 158 Pinion 159 Support shaft 160 First drive mechanism 161 Second drive mechanism 162 First Rack 163 First drive gear 164 2nd Rack 165 Second drive gear 166 Power Transmission Gear 167 Rotary Knob 170 First electrical contact part 171 Second electrical contact part 172 Contact table 172a Contact surface 173 Third electrical contact part 174 Fourth electrical contact part 180 Aperture setting dial 181 Warning Messages 190 Insertion mechanism 191 Insertion hole 200 interchangeable lenses 201 Lens Mount 210 Lens Controller 211 DRAM 212 Flash Memory 220 zoom lens 221 Zoom lens drive unit 230 aperture 231 Aperture drive unit 240 OIS lens 241 Gyro Sensor 242 Position Sensor 243 OIS drive unit 244 OIS processing unit 250 focus lens 251 Focus lens drive unit

Claims

1. an imaging element having an imaging surface onto which light from a subject is incident; a switching mechanism that switches between a first state and a second state different from the first state by changing the state of the light incident on the imaging surface using an optical filter; a display device for displaying information; a processor that controls the image sensor, the switching mechanism, and the display device; Equipped with The processor: determining whether the first state or the second state is present; When the camera is in the first state, first information indicating a first range of a photographing distance that can be set in the first state is displayed on the display device; When the camera is in the second state, second information indicating a second range of the shooting distance that can be set in the second state is displayed on the display device. Imaging device.

2. the first information and the second information include at least one of a number, a letter, a picture, and a bar related to a shooting distance; The imaging device according to claim 1 .

3. the processor changes the display on the display device when the set shooting distance is outside the first range in the first state, or when the set shooting distance is outside the second range in the second state. The imaging device according to claim 1 .

4. modifying the display of the display device includes displaying a message on the display device. The imaging device according to claim 3 .

5. The processor: In the first state, if the set object distance is outside the first range, the object distance is adjusted to be within the first range; In the second state, if the set shooting distance is outside the second range, the shooting distance is adjusted to be within the second range. The imaging device according to claim 1 .

6. The optical filter is a first optical filter; a second optical filter having a refractive index or a thickness different from that of the first optical filter; Including, the first state is a state in which the state of the light is changed by the first optical filter, the second state is a state in which the state of the light is changed by the second optical filter; The imaging device according to claim 1 .

7. The second optical filter has a refractive index or a thickness greater than that of the first optical filter. The imaging device according to claim 6 .

8. The processor: When the camera is in the first state, the first range is determined based on information about a first shooting distance limited in the first state; When the camera is in the second state, the second range is determined based on information about a second shooting distance limited in the second state. The imaging device according to claim 1 .

9. a filter unit including a filter memory for storing information about the optical filter and the shooting distance limited by the optical filter; The optical filter is a first optical filter; a second optical filter having a refractive index or a thickness different from that of the first optical filter; Including, the first state is a state in which the state of the light is changed by the first optical filter, the second state is a state in which the state of the light is changed by the second optical filter, The filter memory includes: a first filter memory that stores information about the first shooting distance limited by the first optical filter; a second filter memory that stores information about the second shooting distance limited by the second optical filter; Including, determining the first range includes obtaining information of the first shooting distance from the first filter memory; determining the second range includes obtaining information of the second object distance from the second filter memory; The imaging device according to claim 8 .

10. The processor: Obtain information about the lens shooting distance of the interchangeable lens attached, determining the first range includes determining the first range based on the first shooting distance and the lens shooting distance; determining the second range based on the second shooting distance and the lens shooting distance; The imaging device according to claim 8 .

11. the switching mechanism includes a drive mechanism that moves the optical filter between a filtering position and a retracted position, the filtering position is a position where the optical filter is disposed in front of the imaging surface of the imaging element, and the light passes through the optical filter before reaching the imaging surface; the retracted position is a position where the optical filter is removed from in front of the imaging surface; The imaging device according to claim 1 .

12. the switching mechanism includes an insertion mechanism that inserts and removes the optical filter to a filtering position; the filtering position is a position where the optical filter is disposed in front of the imaging surface of the imaging element and the light passes through the optical filter before reaching the imaging surface; The imaging device according to claim 1 .

13. a detection mechanism for detecting the first state and the second state; determining whether the first state or the second state includes detecting the first state and the second state by the detection mechanism. The imaging device according to claim 1 .

14. A control method for an imaging device including an imaging element having an imaging surface onto which light from a subject is incident, a switching mechanism that switches between a first state and a second state different from the first state by changing the state of the light incident on the imaging surface using an optical filter, and a display device that displays information, comprising: determining whether the first state or the second state is present; When the camera is in the first state, displaying first information on the display device that indicates a first range of shooting distances that can be set in the first state; When the camera is in the second state, displaying second information on the display device that indicates a second range of the shooting distance that can be set in the second state; Including, A method for controlling an imaging device.

15. A program that causes a processor to execute the control method according to claim 14.

16. A computer-readable storage medium storing a program for causing a processor to execute the control method according to claim 14.

Images