JP4693728B2 - Imaging device - Google Patents

Description

  The present invention relates to a technique for removing foreign matter adhering to an optical element disposed in front of an image sensor in a digital camera or the like.

  Conventionally, when foreign matter such as dust is present in an optical filter disposed near the focal plane of an interchangeable lens digital single-lens reflex camera (hereinafter referred to as “camera”), the shadow of the foreign matter is reflected on the image sensor. There was a problem that. Such foreign matter is caused by dust entering from the outside when the lens is replaced, or by fine abrasion powder such as resin, which is a structural member, due to the operation of the shutter and mirror inside the camera. It is thought that there is.

  In order to solve such a problem, there is a technique for cleaning the cover glass surface of the image sensor with a wiper (see Patent Document 1).

Patent Document 1 discloses a technique for removing dust adhering to the cover glass surface of the image sensor or the outermost surface of the dust-proof structure (for example, the optical filter surface) without removing the lens or disassembling the camera. .
JP 2003-005254 A (page 8, FIGS. 1 and 9)

  However, in the invention of Patent Document 1, the cover glass surface of the image sensor is rubbed with a wiper. Therefore, it is necessary to provide a space necessary for allowing the wiper to pass between the shutter located immediately before the imaging unit and the cover glass surface of the imaging device and the outermost surface of the dust-proof structure. For this reason, there is a problem that the camera becomes large.

  The present invention has been made in view of the above problems, and an object of the present invention is to facilitate the removal of foreign matters attached to an optical element without increasing the size of an imaging apparatus.

  In order to solve the above-described problem, an imaging apparatus according to the present invention includes an imaging element that photoelectrically converts a subject image formed by an imaging optical system, and a shutter unit that blocks a subject luminous flux from the imaging optical system, An optical element disposed between the imaging element and the shutter means, a cleaning member for removing foreign matter attached to the optical element, and a direction in which the cleaning member is substantially perpendicular to the optical axis of the imaging optical system And a distance adjusting means for adjusting a distance between the optical element and the shutter means when the cleaning member is driven by the driving means.

  According to the present invention, it is possible to easily remove foreign matters attached to the optical element without increasing the size of the imaging apparatus.

Hereinafter, a camera according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. The embodiment described below is an example as means for realizing the present invention, and should be appropriately modified or changed according to the configuration of the apparatus to which the present invention is applied and various conditions. Therefore, the present invention is not limited to the following embodiment.
(Camera configuration common to each embodiment)
FIG. 1 is a schematic diagram showing the configuration of a camera common to the embodiments of the present invention described below. The camera includes a camera body 100 and a photographing lens 102 that is detachably attached to the camera body 100. The camera body 100 is a single-plate digital camera using an image sensor such as a CCD image sensor or a CMOS image sensor, and obtains an image signal representing a moving image or a still image by driving the image sensor continuously or once. .

  The mount mechanism 101 connects the detachable photographic lens 102 to the camera body 100. The photographic lens 102 is electrically and mechanically connected to the camera body 100 via a lens mount contact 102a, a camera body mount 101, and a camera mount contact 100a. By attaching the photographing lens 102 having different focal lengths to the camera body 100, it is possible to obtain imaging screens having various angles of view. Reference numeral 104 denotes an aperture that operates in response to an instruction transmitted from the camera body via the lens mount 102a.

  An optical element 11 that restricts the cutoff frequency of the imaging optical system 103 is provided in the subject light flux including the optical axis L <b> 1 from the imaging optical system 103 to the imaging unit 13. This is to prevent a spatial frequency component higher than necessary in the subject image (optical image) from reaching the imaging unit 13.

  The signal read from the imaging unit 13 is displayed on the display unit 107 as image data after being subjected to predetermined processing as will be described later. The display unit 107 is attached to the back surface of the camera body 100, and the user can directly observe the image data displayed on the display unit 107.

  The movable half mirror 111a reflects part of the subject light flux from the imaging optical system 103 and transmits the remaining subject light flux. The focusing screen 105 is disposed on a planned image plane of a subject image formed by the imaging optical system.

  The finder lens 109 is a lens for observing a subject image formed on the focusing screen 105, and is composed of one or a plurality of finder lenses. The focusing screen 105, the pentaprism 122, and the finder lens 109 constitute a finder optical system.

  A movable sub-mirror 112a is arranged behind the half mirror 111a (image plane side), and reflects a subject light beam near the optical axis L1 out of the subject light beam transmitted through the half mirror 111a and guides it to the focus detection unit 121. Yes. The sub mirror 112a rotates around a rotation shaft provided on a holding member (not shown) of the half mirror 111a, and moves in conjunction with the movement of the half mirror 111a. The focus detection unit 121 receives the subject light flux from the sub mirror 112a and performs focus detection by the phase difference detection method.

  The light beam splitting system composed of the half mirror 111a and the sub mirror 112a can take two states, a first light beam split state and a second light beam split state. The first light beam splitting state is a state in which the subject light beam is guided to the finder optical system. On the other hand, the second light beam split state is a second light beam split state in which the subject light beam from an imaging lens (not shown) is retracted from the subject light beam including the optical axis L1 in order to directly guide the subject light beam to the imaging unit 13. . In the first light beam splitting state, the half mirror 111a and the sub mirror 112a are located at the positions indicated by thick lines in FIG. 1, respectively, and in the second light beam splitting state, the half mirror 111b and The submirrors 112a are located respectively.

  The movable flash light emitting unit 106 can move between a storage position stored in the camera body 100 and a light emission position protruding from the camera body 100. The focal plane shutter 20 adjusts the amount of light incident on the image plane. The main switch 119 is a switch that activates the camera body 100.

  The release button 120 is pressed in two steps. The release button 120 starts an imaging preparation operation by a half-press operation (SW1 ON), and starts an imaging operation by a full-press operation (SW2 ON). The imaging preparation operation includes, for example, a photometry operation and a focus adjustment operation. Further, the imaging operation includes, for example, an operation of recording image data read from the imaging unit 13 on a recording medium.

  The mode switch 123 is a switch for switching the operation mode. For example, by operating the mode switching switch 123, the camera body 100 is switched from an imaging mode for imaging a subject to a cleaning mode in order to remove foreign matters such as dust attached to the surface of the optical element 11 of the camera body 100. be able to. Normally, the cleaning mode is automatically entered immediately after the main switch 119 is turned on. However, the mode selector switch 123 is operated when the user wants to arbitrarily clean the imaging surface. The information display unit 180 in the optical finder is a unit for displaying specific information on the focusing screen 105.

  A cleaning member 32 is disposed between the imaging unit 13 and the focal plane shutter 20, and can be moved in a plane substantially perpendicular to the optical axis L1 by a driving mechanism described later. The cleaning member 32 may be configured by an adhesive roller whose surface is formed of an adhesive material, but is not limited thereto, and may be configured by a rubber wiper blade or the like.

  The configuration shown in FIG. 1 has been described as common to the embodiments described later. However, the relative relationship and configuration of the optical element 11, the imaging unit 13, the focal plane shutter 20, and the cleaning member 32 are the same in each embodiment. It will be changed as a feature. Specifically, each embodiment will be described later.

  FIG. 2 is a block diagram illustrating an electrical configuration of a camera common to the embodiments. It should be noted that the same components as those shown in FIG.

  As elements responsible for image processing, an A / D converter 130, an RGB image processing circuit 131, and a YC processing circuit 132 are provided. Further, a recording processing circuit 133 and a reproduction processing circuit 134 are provided as elements responsible for recording and reproduction. Reference numeral 138 denotes a standardized external output terminal connected to the recording processing circuit.

  The camera system control circuit 135 controls the camera body 100 and the photographing lens 102 as a whole. The camera system control circuit 135 controls various peripheral circuits in addition to the above-described circuits. For example, an operation detection circuit 136 for detecting a user operation, an image pickup unit drive circuit 137 for driving the image pickup unit, an information display circuit 142 for controlling driving of the information display unit 180 in the optical viewfinder, and the like are controlled. Further, it controls the AF control circuit 140, the focus detection sensor 167 corresponding to the focus detection unit 121, the shutter control circuit 145 for driving the actuator 40 for opening and closing the focal plane shutter 20 and the like related to the photographing operation.

  When the camera system control circuit 135 controls the taking lens 102, the taking lens is indirectly controlled by controlling the lens system control circuit 141 via the camera mount contact 100a and the lens mount contact 102a. When the lens system control circuit 141 receives information related to the aperture value from the camera system control circuit 135, the lens system control circuit 141 drives the aperture drive actuator 143 to operate the aperture 104 so that the aperture diameter is in accordance with the aperture value. Further, when the lens system control circuit 141 receives information on the driving amount of the focus lens from the camera system control circuit 135, the lens system control circuit 141 drives the AF motor 147 and obtains the in-focus state of the imaging optical system 103 by a driving mechanism (not shown). Since the recording operation and the reproducing operation from the photographing operation of the camera are executed by a generally known method, the description of the specific operation is omitted.

  Reference numeral 41 denotes an actuator for moving the cleaning member 32 in a plane perpendicular to the optical axis L1. The actuator 41 is driven by the driver 152 in accordance with an instruction from the camera system control circuit 135.

  Reference numeral 44 denotes an actuator for moving the optical element 11 in the direction of the optical axis L1. The actuator 44 is driven by the driver 150 in accordance with an instruction from the camera system control circuit 135.

The configuration shown in FIG. 2 has been described as common to the embodiments described later. However, the actuators 40, 41, and 44 related to the optical element 11, the imaging unit 13, the focal plane shutter 20, and the cleaning member 32, and these. The functions and configurations of the shutter control circuit 145 and the drivers 150 and 152 for driving are changed as features in each embodiment. Specifically, each embodiment will be described later.
(First embodiment)
3 and 4 are side cross-sectional views for explaining the main configuration and operation around the imaging unit of the camera according to the preferred first embodiment of the present invention.

  Reference numeral 12 denotes a holding member that holds the optical element 11. The imaging unit 13 includes an imaging element 13a that photoelectrically converts a subject image, a cover member 13b that protects the imaging element 13a, and a connection terminal 13c. The seal member 14 is configured to seal between the imaging unit 13 and the optical element 11. On the substrate 15, electrical elements that constitute a control circuit that controls the operation of the camera are arranged, and a connection terminal 13 c of the imaging unit 13 is connected. The optical element 11 and the imaging unit 13 are arranged so as to maintain a predetermined distance, so that even if a foreign object adheres to the surface of the optical element 11, the shadow is blurred as much as possible on the imaging element 13 a. Has been taken into account.

  Further, the optical element 11 and the holding member 12 are configured to be movable integrally in the direction of the optical axis L1 by an interval adjusting mechanism described later.

  The focal plane shutter 20 as a shutter means for blocking the subject light flux from the imaging optical system 103 is mainly composed of a front curtain 21, a rear curtain 22, an intermediate plate 23, a presser plate 24, and a cover plate 25. ing. The front curtain 21 and the rear curtain 22 are each composed of a plurality of shutter blades. The intermediate plate 23 divides the drive space between the front curtain 21 and the rear curtain 22 in the focal plane shutter 20. The presser plate 24 is a presser plate for the front curtain 21 and has an opening at a substantially central portion for imaging. The cover plate 25 is a pressing plate for the rear curtain 22 and is provided with an opening at a substantially central portion for imaging. The shutter blades constituting the front curtain 21 and the rear curtain 22 are configured to be opened and closed by an actuator 40. 3 and 4, the focal plane shutter 20 is in a so-called charged state, with the front curtain 21 in the unfolded state and the rear curtain 22 in the retracted state.

  The stopper 31 positions the optical element 11 by bringing a holding member 12 that holds the optical element 11 into contact therewith. As shown in FIG. 3, the cleaning member 32 described above is disposed on the imaging unit side of the focal plane shutter 20 and at the upper end of the optical element 11 when not in the cleaning mode operation state. In the present embodiment, the cleaning member 32 is described as an adhesive roller having a surface made of an adhesive material.

  On the other hand, FIG. 4 shows a case where the cleaning member 23 is operating in the cleaning mode state. As can be seen from comparison with FIG. 3, the optical element 11 and the holding member 12 are integrally moved along the optical axis L <b> 1 along the optical axis L <b> 1 by the interval adjusting mechanism described later. The distance to the focal plane shutter 20 is increased. The cleaning member 23 moves in the direction of the arrow while contacting and rotating on the surface of the optical element 11 to remove foreign matter. When the cleaning member 23 reaches the lower end of the optical element 11, this time it moves in the direction opposite to the arrow, thereby returning to the upper end portion of the original optical element 11.

  When the cleaning member 23 returns to the upper end portion of the optical element 11, this time, the optical element 11 and the holding member 12 are integrally moved in parallel to the focal plane shutter 20 side, and the original portion that has maintained a predetermined distance from the imaging unit 13 is maintained. Return to position.

  5 and 6 are diagrams for schematically explaining the distance adjusting mechanism of the optical element 11 and the driving mechanism of the cleaning member 32. FIG. FIG. 5 is a top view of these mechanisms, and FIG. 6 is a side view of these mechanisms.

  The distance adjusting mechanism of the optical element 11 includes as main components an actuator 44 that rotates a lead screw, a cylindrical portion 12a that is formed integrally with the holding member 12, and a guide shaft 45. In the first embodiment, a rotary motor is used as the actuator 44 and is hereinafter referred to as a motor 44.

  The lead screw and the guide shaft 45 are arranged so as to be parallel and extend in the direction of the optical axis L1. The cylindrical portion 12a has a female screw formed in a hole portion into which the lead screw is inserted, and is screwed with the lead screw. When the motor 44 is driven by the driver 150, the lead screw rotates and the holding member 12 formed integrally with the cylindrical portion 12a moves in the direction of the optical axis L1 by the guide shaft 45.

  The drive mechanism of the cleaning member 32 includes a cleaning member 32, a drive lever 42, guide plates 43a and 43b, and an actuator 41 as main components. In the first embodiment, a rotary motor is used as the actuator 41, and hereinafter referred to as a motor 41. The motor 41 is driven by a driver 152.

  The guide plates 43a and 43b are provided with slits as shown in the figure, and guide both ends of the cleaning member 32 by the slits. When both ends of the cleaning member 32 move up and down while rotating the slit, the adhesive roller of the cleaning member 32 can move while rotating and contacting the surface of the optical element 11.

  The drive lever 42 is attached to the rotating shaft of the motor 41 and swings as the motor 41 rotates. The drive lever 42 is provided with a long hole, and one end of the cleaning member 32 is fitted therein. Accordingly, since the one end of the cleaning member 32 is fitted into both the elongated hole and the slit of the guide plate 43a, when the drive lever 42 swings, the intersection of the elongated hole and the slit moves, Along with this, the cleaning member 32 moves up and down.

  Next, the operation of each part in the cleaning mode will be described. FIG. 7 is a flowchart for explaining the operation of each unit in the cleaning mode. In FIG. 7, the operation starts when the main switch 119 of the camera body 100 is turned on.

  In step S100, the camera system control circuit 135 determines whether or not the user has operated the mode switch 123 of the camera body 100 to instruct the cleaning mode. If the camera system control circuit 135 detects that the cleaning mode has been instructed (“Yes” in step S100), the process proceeds to step S101. If not ("No" in step S100), the cleaning mode instruction standby state is entered.

  In step S101, the camera system control circuit 135 stores the imaging conditions such as the shutter speed and the aperture value set in the camera body 100 before shifting to the cleaning mode in a memory (not shown) and proceeds to step S102.

  In step S <b> 102, the camera system control circuit 135 moves the optical element 11 in the direction of the imaging unit 13 by controlling the distance adjustment mechanism of the optical element 11, specifically, the driver 150.

  In step S103, the camera system control circuit 135 determines whether or not the optical element 11 has moved to a predetermined position by a detection unit (not shown). When it is determined that the movement of the optical element 11 to the predetermined position is completed (“Yes” in step S103), the process proceeds to step S104. If not (“No” in step S103), the process of step S103 is repeated.

  Next, in step S <b> 104, the camera system control circuit 135 drives the cleaning member 32 by controlling the driving mechanism of the cleaning member 32, specifically, the driver 152, and rotationally contacts the surface of the optical element 11. Move while. By this step, the foreign matter adhering to the surface of the optical element 11 is removed.

  In step S105, the camera system control circuit 135 determines whether the cleaning member 32 has been reciprocated up and down on the surface of the optical element 11 to return to the original position, that is, whether a series of movement operations has been completed. If it is determined that the moving operation is completed (“Yes” in step S105), the process proceeds to step S106. If it is determined that the moving operation has not been completed (“No” in step S105), the process of step S105 is repeated.

  In step S <b> 106, the camera system control circuit 135 moves the optical element 11 in the direction of the focal plane shutter 20 by controlling the distance adjustment mechanism of the optical element 11.

  In step S107, the camera system control circuit 135 determines whether or not the detection unit (not shown) detects the completion of movement of the optical element 11 to the original position (position before starting movement in step S102). To do. When completion of movement to the original position is detected (“Yes” in step S107), the process proceeds to step S108. If not (“No” in step S107), the process of step S107 is repeated until this is detected.

  In step S108, the camera system control circuit 135 causes the display unit 107 to display end message information indicating that a series of cleaning mode operations have been completed.

  In step S109, the camera system control circuit 135 reads the imaging conditions and the like stored in the memory in step S101, sets them again in the camera body 100, and ends the series of cleaning mode processes.

  As described above, according to the first embodiment, the distance between the focal plane shutter and the optical element is increased only in the cleaning mode. Thereby, while securing the movement space of the cleaning member, it is possible to obtain an effect that the shadow is blurred on the image sensor even if foreign matter is adhered on the optical element at the time of photographing.

Further, since the cleaning operation can be performed in a state where the front curtain of the focal plane shutter is unfolded, it is possible to prevent further foreign matter from entering from the outside.
(Modification of the first embodiment)
In the first embodiment, the distance adjusting mechanism is provided so as to move the optical element 11 and the holding member 12 integrally. However, the focal plane shutter 20 is moved so as to perform the same function. An interval adjusting mechanism may be provided.

For example, if a cylindrical portion in which a female screw is formed in a hole for inserting a lead screw is provided on the base plate of the focal plane shutter 20, and the guide shaft is also arranged so as to guide the focal plane shutter, the focal plane is driven by the motor with the same configuration. It becomes possible to move the shutter 20 in the direction of the optical axis L1. In such a configuration, the focal plane shutter 20 may be moved away from the optical element 11 in order to secure a space for the cleaning member 32 to travel. In this case, in the block diagram showing the electrical configuration of the camera described with reference to FIG. 2, the actuator 44 and the driver 150 for driving the actuator 44 are connected to the focal plane shutter 20 instead of the optical element 11. become.
(Second Embodiment)
8 and 9 are side cross-sectional views for explaining the main configuration and operation around the imaging unit of the camera according to the preferred second embodiment of the present invention. 8 and 9, the description of elements having the same reference numerals as those in FIGS. 3 and 4 is omitted.

  In the second embodiment, an abrasion-resistant fiber is used as the cleaning member 56. The anti-abrasion fiber can be entangled with foreign matter on the surface thereof by moving in contact with the surface of the optical element 11. The cleaning member 56, which is an abrasion-resistant fiber, is attached to the blade of the rear curtain 22 closest to the optical element.

  The optical element 11 and the holding member 12 are configured to be integrally movable in the direction of the optical axis L1 by a mechanism similar to the interval adjusting mechanism shown in the first embodiment.

  Reference numeral 51 denotes a stopper for restricting the amount of movement of the holding member 12. When the holding member 12 is moved integrally with the optical element 11 toward the focal plane shutter side, the position of the cleaning member 56 is adjusted so that the cleaning member 56 contacts the surface of the optical element 11 at a position where the holding member 12 contacts the stopper 51. Has been.

  In FIG. 8, the focal plane shutter 20 is in a so-called charged state, with the front curtain 21 in the unfolded state and the rear curtain 22 in the retracted state.

  FIG. 9 shows a case where the cleaning member 56 attached to the rear curtain 22 is operating in the cleaning mode state. As can be seen from comparison with FIG. 8, the optical element 11 and the holding member 12 are integrally moved along the optical axis L <b> 1 along the optical axis L <b> 1 by the interval adjusting mechanism, And the cleaning member 56 come into contact with each other.

  The cleaning member 56 moves while contacting the surface of the optical element 11 in the direction of the arrow by using the traveling operation of the rear curtain 22 to remove foreign matter. When the running operation of the rear curtain 22 is completed and the cleaning member 56 reaches the upper end of the optical element 11, this operation returns to the original rear curtain charge state by performing the rear curtain 22 charging operation.

  When the cleaning member 56 returns to the original position in accordance with the charging operation of the rear curtain 22, the optical element 11 and the holding member 12 are integrated and moved parallel to the image pickup unit 13 side, and the image pickup unit 13 and the predetermined part are moved. Return to the original position keeping the distance.

  In the first embodiment, in order for the cleaning member 32 to move on the surface of the optical element 11, an independent motor 44 and a driver 150 for driving the motor 44 are required. However, in the second embodiment, the cleaning member 56 is bonded to the rear curtain 22 and the foreign matter is removed by using the operation of the focal plane shutter 20, so that such an independent motor and driver are not required. . Therefore, even in the block diagram showing the electrical configuration of the camera described with reference to FIG. 2, the second embodiment does not have these elements. In other words, it can be said that the actuator 41 and the driver 152 for driving the cleaning member are shared by the actuator 40 for driving the focal plane shutter and the shutter control circuit 145 for driving the actuator.

  In the first embodiment, the operation of each part in the cleaning mode described with reference to FIG. 7 is approximately the same in the second embodiment. The difference is that the moving direction of the optical element 11 is reversed and that the traveling / charging of the focal plane shutter 20 is controlled in moving the cleaning member.

As described above, according to the second embodiment, the distance between the focal plane shutter and the optical element is shortened only in the cleaning mode. As a result, during normal photographing, the travel of the shutter curtain due to the contact of the cleaning member is not hindered, so the travel speed is not reduced. Further, since the foreign matter is removed by using the traveling of the rear curtain of the focal plane shutter, no special actuator or driver is required, which is effective in avoiding the large size of the image pickup apparatus.
(Modification of the second embodiment)
In the second embodiment described above, the anti-wearing fiber that can entangle the foreign matter on the surface of the optical element 11 by being moved in contact with the surface of the optical element 11 is used as the cleaning member. In obtaining the same effect as the embodiment, the present invention is not limited to this.

  For example, it is possible to use an electrostatic chucking brush that can be charged and discharged as the cleaning member. If the electrostatic adsorption brush travels in a charged state and does not touch the surface of the optical element 11 slightly, the foreign matter on the surface is attracted to the electrostatic adsorption brush side. It is possible to make it. In this case, a circuit for controlling charging / discharging in conjunction with the running of the rear curtain 22 is further required.

It is the schematic which shows the structure of the camera common to embodiment of this invention. It is a block diagram which shows the electric constitution of the camera common to embodiment of this invention. It is a side sectional view for explaining the principal part composition and operation around the image pick-up part of the camera concerning a 1st embodiment of the present invention. It is a side sectional view for explaining the principal part composition and operation around the image pick-up part of the camera concerning a 1st embodiment of the present invention. FIG. 3 is a top view of a distance adjusting mechanism of the optical element 11 and a driving mechanism of a cleaning member 32 according to the first embodiment of the present invention. 2 is a side view of a distance adjusting mechanism of the optical element 11 and a driving mechanism of a cleaning member 32 according to the first embodiment of the present invention. FIG. 6 is a flowchart for explaining the operation of each unit in the cleaning mode according to the first embodiment of the present invention. It is a sectional side view for demonstrating the principal part structure and operation | movement of an imaging part periphery of the camera which concerns on the 2nd Embodiment of this invention. It is a sectional side view for demonstrating the principal part structure and operation | movement of an imaging part periphery of the camera which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

11 Optical element 13 Imaging unit 20 Focal plane shutter

Claims (6)

An image sensor that photoelectrically converts a subject image formed by the imaging optical system;
Shutter means for blocking a subject luminous flux from the imaging optical system;
An optical element disposed between the imaging element and the shutter means;
A cleaning member for removing foreign matter adhering to the optical element;
Drive means for driving the cleaning member in a direction perpendicular to the optical axis of the imaging optical system;
An imaging apparatus comprising: an interval adjusting unit that adjusts an interval between the optical element and the shutter unit when the cleaning unit is driven by the driving unit.   The imaging apparatus according to claim 1, wherein the interval adjusting unit moves the optical element in a direction away from the shutter unit when the cleaning unit is driven by the driving unit.   The imaging apparatus according to claim 1, wherein the interval adjusting unit moves the shutter unit in a direction away from the optical element when the cleaning unit is driven by the driving unit. The distance adjusting means widens the distance between the optical element and the shutter means when driving the cleaning member by the driving means,
The imaging apparatus according to claim 1, wherein the driving unit inserts the cleaning member between the optical element and the shutter unit. The shutter means has at least one shutter blade;
The cleaning means is disposed on the shutter blade;
The imaging apparatus according to claim 1, wherein the driving unit is a driving unit that drives the shutter blade.   The imaging apparatus according to claim 5, wherein the interval adjusting unit moves the optical element in a direction approaching the shutter unit when the shutter unit is driven by the driving unit.

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