JP2006246224A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus which enables photographing to be done without being mounted with a lens unit. <P>SOLUTION: In the lens unit 23, a photographing lens 24 and a CCD 25 are housed. A digital camera 10 includes a mount part 12 on the front surface of a camera main body 11 and the lens unit 23 is freely detachably mounted on the mount part 12. Also, on the upper surface of the camera main body 11, an imaging part 19 is arranged near the mount part 12. The imaging part 19 includes a photographing lens 31 and a CCD 32, and a part of the photographing lens 31 is exposed to the outside. Also, the CCD 32 images an object image image-formed by the photographing lens 31. Thus, photographing is performed even in such a state that the lens unit 23 is not mounted. Also, since the photographing lens 31 is not covered even in such a state that the lens unit 23 is mounted, one of the CCDs 25 and 32 is selected and photographing is performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image pickup apparatus including a mounting portion on which an interchangeable lens unit having a photographing lens and an image sensor is detachably mounted.

  In recent years, a digital camera (imaging device) that stores image data captured by an imaging element such as a CCD in a storage unit such as a memory card is generally used. There is also known a digital camera including a mounting portion (mount portion) on which an interchangeable lens is detachably mounted. However, in a digital camera with an interchangeable lens attached, an opening is formed in the mount, so that dust or the like enters the camera body, and dust adheres to the image sensor and its surrounding parts, resulting in a high quality image. There was a problem of deterioration.

In order to solve such a problem, a digital camera is known in which a lens unit that integrally houses an image pickup element is detachably mounted in an interchangeable lens (see, for example, Patent Document 1).
JP 2004-109970 A

  However, as described in Patent Document 1, in a digital camera in which a lens unit is detachably mounted, photographing cannot be performed in a state where the lens unit is not mounted on the camera body. For this reason, there is a problem that even if it is desired to take a picture unexpectedly, it is necessary to attach the lens unit, so that a photo opportunity is missed.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an imaging device capable of photographing even when a lens unit is not attached.

  In order to solve the above-described problem, an imaging apparatus according to the present invention is an imaging apparatus including a mounting portion on which an interchangeable lens unit having a first photographing lens and a first imaging element is detachably mounted. And a second imaging lens that is disposed near the imaging unit and exposed to the outside of the imaging apparatus main body, and a second imaging element that captures a subject image formed by the second imaging lens. To do.

  Further, it is preferable that the second photographic lens is disposed above or near the left and right of the mounting portion. Furthermore, it is preferable that an imaging unit having the second imaging lens and the second imaging element is provided so as to be movable in the vertical direction or the horizontal direction with respect to the imaging device main body.

  In addition, it is preferable that the second image sensor is an image sensor having a lower pixel than the first image sensor.

  Furthermore, when detecting that the lens unit is mounted on the mounting portion, and detecting the mounting of the lens unit by the detecting unit, before performing the photographing process by the first imaging element, Preferably, the image processing apparatus includes a control unit that controls the second image pickup element to pick up a subject image and executes a shooting preparation process based on image data acquired by the image pickup.

  Further, the photographing preparation process is a focus adjustment process, an exposure control process, a white balance adjustment process, and a through image display process for the first image sensor, and the control unit is configured to adjust the focus adjustment based on the image data. It is preferable to execute at least one of a process, the exposure control process, the white balance adjustment process, and the through image display process.

  Further, when the mounting of the lens unit is detected by the detection unit, the control unit displays a through image having a field angle substantially equal to the captured image of the first image sensor by combining an optical zoom and an electronic zoom. It is preferable to display on the means.

  In addition, when the lens unit is detected to be mounted by the detecting unit and moving image shooting is performed, it is preferable that the control unit controls the second imaging element to perform shooting processing.

  Further, the image pickup apparatus main body is provided with two or more loading sections into which the recording medium is detachably loaded, and the recording medium loaded in any one of these loading sections has a moving image. Preferably data is recorded.

  In addition, the mounting portion has a contact member that contacts the contact point of the lens mount when the lens unit is mounted, and a shielding member that is movable between a shielding position that covers the contact point and a retracted position that retreats from the contact point. It is preferable that the shielding member is moved from the shielding position to the retracted position at the same time as the lens unit is mounted.

  Furthermore, it is preferable that a plurality of the first imaging elements are arranged in the lens unit, and an optical member that splits the subject light flux and guides it to each of the first imaging elements is provided.

  According to the imaging apparatus of the present invention, the second imaging lens is disposed in the vicinity of the mounting portion to which the lens unit is mounted, and the second imaging element that captures the subject image formed by the second imaging lens is the camera body. Is provided inside. For this reason, since it is possible to perform photographing even when the lens unit is not attached, it is possible to prevent a photo opportunity from being missed. Further, even when the lens unit is attached, the second photographing lens is not covered, so that one of the first image sensor and the second image sensor can be selected for photographing.

    In addition, since the imaging unit having the second imaging lens and the second imaging element is provided so as to be movable in the vertical direction or the horizontal direction with respect to the imaging device body, the direction in which the imaging device body is gripped is changed. However, the imaging unit can be moved to a position that does not interfere with the shooting operation, and operability can be improved.

  Furthermore, the second image sensor is an image sensor having a pixel lower than that of the first image sensor, and when the lens unit is mounted on the mounting portion and shooting is performed, before the shooting process is performed by the first image sensor, the second image sensor is An imaging preparation process is performed based on the image data acquired by the imaging element. For this reason, when the imaging preparation process is performed, only the low-pixel image sensor is driven, so that power consumption can be reduced.

  In addition, when shooting with the lens unit mounted on the mounting portion, a through image having a field angle substantially equal to the captured image of the first image sensor is displayed by combining the optical zoom and the electronic zoom. Even if the image data acquired by the above is displayed as a through image, the photographer can shoot without a sense of incongruity.

  At the time of moving image shooting, even if the lens unit is attached, shooting is performed by the second image sensor, so that power consumption can be reduced.

  Further, when the lens unit is not mounted, the contact provided on the mounting portion is covered with the shielding member, so that it is possible to prevent contact failure due to dust or the like adhering to the contact.

  A digital camera 10 shown in FIG. 1 includes a mount unit 12, a release button 13, and a strobe light emitting unit 14 that emits strobe light toward a subject on the front surface of a camera body 11, and a power button on the top surface. 15, an operation unit 18 including a shutter button 16 and an operation dial 17, and an imaging unit 19 are provided. The power button 15 is pressed when the camera body 11 is turned on or off. The shutter button 16 is pressed when shooting. The operation dial 17 is operated when switching between the still image shooting mode, the moving image shooting mode, and the playback mode.

  The side surface of the camera body 11 is provided with memory card slots (loading portions) 21a and 21b in which a memory card 20 as a recording medium is detachably loaded. Further, as shown in FIG. 2, an LCD (Liquid Crystal Display) 22 that is a display means for displaying images and various setting screens and a zoom operation button 33 constituting the operation unit 18 are provided on the back of the camera body 11. It has been. The zoom operation button 33 is operated when changing the zoom magnification.

  The mount portion 12 is a mounting portion to which the interchangeable lens unit 23 is detachably mounted. As shown in FIG. 1, a concave portion 12a is provided in the center portion. In the lens unit 23, there are provided a photographing lens (first photographing lens) 24 and a CCD (first imaging element) 25 that is an image pickup element for picking up a subject image formed by the photographing lens 24. . At least a part of the photographing lens 24 is exposed on the front side of the lens unit 23.

  Further, a mount portion 26 is provided on the back side of the lens unit 23. When the lens unit 23 is attached to the camera body 11, the lens unit 23 is attached by inserting the mount portion 26 into the recess 12 a. As the lens unit 23, a plurality of types of lens units are available, such as those with different focal lengths of the taking lens, those with different numbers of CCD pixels, those capable of monochrome photography, and those capable of infrared photography. Is done. The photographer selects a desired lens unit from these lens units and attaches it to the digital camera 10.

  The recess 12a is provided with a mount contact 27, a barrier 28, and a lock pin 29. The mount contact 27 comes into contact with a mount contact 105 (see FIG. 7) formed on the back surface of the mount unit 26 when the lens unit 23 is attached to the mount unit 12. Thereby, the lens unit 23 is electrically connected to the digital camera 10.

  The barrier 28 is a shielding member that covers the mount contact 27 and prevents dirt and the like from adhering to it when the lens unit 23 is not attached to the camera body 11. When the lens unit 23 is mounted on the camera body 11, the lock pin 29 engages with an engagement hole (not shown) formed on the back surface of the mount portion 26, and the lens unit 23 is detached from the mount portion 12. To prevent that. If the release button 13 is pressed while the lens unit 23 is attached to the camera body 11, the engagement is released and the lens unit 23 can be removed.

  The imaging unit 19 includes a photographic lens (second photographic lens) 31 and a CCD (second imaging element) 32 that is an imaging element that images a subject image formed by the photographic lens 31. As the CCD 32, a CCD having a lower pixel than that of the CCD 25 is used, and the power consumption is lower than that of the CCD 25. Further, the photographing lens 31 is exposed on the front surface of the imaging unit 19.

  As shown in FIGS. 3A and 3B, the imaging unit 19 is provided to be movable up and down and left and right with respect to the camera body 11. For this reason, even when the direction in which the camera body 11 is gripped is changed, the imaging unit 19 can be moved to a position that does not interfere with the operation of the photographer, and operability can be improved.

  The mount 12 is provided with a detection pin 30 above the recess 12a. When the lens unit 23 is mounted on the camera body 11, the detection pin 30 is pressed by the back surface of the lens unit 23 and is pressed into the mount portion 12.

  As shown in FIG. 4, a detection switch 40 is provided in the mount portion 12. The detection switch 40 is detection means for detecting that the lens unit 23 is attached to the camera body 11. The detection switch 40 includes a switch body 41 and two contact pieces 42a and 42b having conductivity. One end of each of the contact pieces 42a and 42b is connected to the switch body 41 and is disposed in a state of not contacting each other. The switch body 41 outputs an ON signal that is a detection signal when the two contact pieces 42a and 42b come into contact with each other and become conductive.

  The detection pin 30 is arranged so that the front end side protrudes to the outside from the opening 44 formed in the mount portion 12, and the rear end side is connected to the pin 46 by a connecting plate 45. A spring 47 is inserted into the pin 46. The spring 47 is disposed between the connecting plate 45 and a pressing plate 48 formed on the inner wall of the mount portion 12. In addition, an opening 48a is formed in the pressing plate 48, and the tip of the pin 46 is inserted. The aforementioned detection switch 40 is arranged so that the tip of the contact piece 42 a is adjacent to the tip of the pin 46.

  In a state where the lens unit 23 is not attached to the camera body 11, the detection pin 30 is not pressed into the mount portion 12 because it is not pressed by the back surface of the lens unit 23. That is, the contact piece 42 a is not pressed by the tip end portion of the pin 46. For this reason, as shown in FIG. 3A, the contact pieces 42a and 42b do not come into contact with each other, and therefore no ON signal is output from the switch body 41.

  In addition, when the lens unit 23 is inserted into the recess 12 a in order to attach the lens unit 23 to the camera body 11, the detection pin 30 is pushed into the mount portion 12 against the urging force of the spring 47. For this reason, the contact piece 42a is pressed by the tip of the pin 46, and the contact piece 42a and the contact piece 42b come into contact with each other as shown in FIG. At this time, an ON signal is output from the switch body 41.

  As described above, the recess 12 a is provided with the barrier 28 that covers the mount contact 27. As shown in FIG. 5, the barrier 28 includes a shielding portion 28 a that covers the mount contact 27, a gear portion 28 b, and a connecting portion 28 c that connects them. A rotation shaft 28d is provided at the center of the gear portion 28b, and the barrier 28 is rotatably held by the mount portion 12.

  The gear portion 28 b meshes with a gear 51 that is rotationally driven by the motor 50, and the barrier 28 is rotated by the motor 50. The barrier 28 is rotated between a shielding position that shields the mount contact 27 (position shown in FIG. 5A) and a retreat position (FIG. 5B) that retreats from the recess 12a. The barrier 28 moves from the shielding position to the retracted position when the detection switch 40 detects the mounting of the lens unit 23.

  Next, the electrical configuration of the digital camera 10 will be described. As shown in FIG. 6, the digital camera 10 is provided with a control unit 60 that is a control unit that controls each unit in the camera body 11. The control unit 60 includes a ROM that stores a control program that controls each unit, and a RAM that temporarily stores work data. The control unit 60 controls each unit based on this control program.

  The control unit 60 is connected to the motor 62 via the motor driver 61 and is further connected to the motor 64 via the motor driver 63. The motor control unit 60 controls the motor driver 61 to drive the motor 62, and similarly controls the motor driver 63 to drive the motor 64. The photographing lens 31 includes a zoom lens 65 and a focus lens 66. The zoom lens 65 is moved back and forth in the optical axis direction by the motor 62 to change the zoom magnification. The focus lens 66 is moved back and forth in the optical axis direction by the motor 64 to perform focus adjustment.

  The CCD 32 is disposed behind these lenses 65 and 66 and is connected to the control unit 60 via a CCD driver 67. The control unit 60 drives the CCD 32 by controlling the CCD driver 67. The CCD 32 converts the subject image into an electrical signal by photoelectric conversion, and acquires image data that is an analog signal.

  The CCD 32 is connected to an analog signal processing unit 68, and image data captured by the CCD 32 is output to the analog signal processing unit 68. The analog signal processing unit 68 is connected to the control unit 60 via the data bus 69 and is controlled by the control unit 60.

  The analog signal processing unit 68 includes a correlated double sampling circuit (CDS), an amplifier (AMP), and the like. After the noise of the image data is removed by the CDS, the analog signal processing unit 68 is amplified by the AMP. The analog signal processing unit 68 outputs image data to the A / D converter 70. The A / D converter 70 converts the image data from an analog signal to a digital signal, and outputs the image data to the AF detection circuit 71, the AE / AWB detection circuit 72, and the digital signal processing unit 73.

  The AF detection circuit 71 is controlled by the control unit 60, detects the in-focus position where the amplitude value of the high frequency component of the image data is maximized, and outputs the AF detection value to the control unit 60. The AE / AWB detection circuit 72 detects an AE detection value that optimizes the exposure amount, that is, the shutter speed of the electronic shutter, and an AWB detection value that optimizes the white balance, and outputs the detected value to the control unit 60.

  Each detection circuit 72 and 73 sequentially transmits each detection value to the control unit 60 when the shutter button 16 is half-pressed. The control unit 60 controls the operations of the focus lens 66 and the CCD 32 based on the detection values acquired from the detection circuits 72 and 73.

  The digital signal processing unit 73 is connected to a memory 74 via a data bus 69 and stores image data in the memory 74. When the image data is stored in the memory 74, the digital signal processing unit 73 performs various image processing such as gradation conversion, white balance correction, and γ correction, and YC conversion processing on the image data.

  In the shooting mode, the digital signal processing unit 73 performs simple image processing and simple YC processing on the image data before the shooting process is executed, and outputs the image data to the LCD driver 75. The control unit 60 controls the LCD driver 75 to display the image data on the LCD 22 as a through image.

  When the photographing process is executed, the digital signal processing unit 73 performs image processing, YC conversion processing, compression processing, and the like on the image data. The compression processing is performed by the JPEG method for still image shooting, and is performed by the MPEG method for moving image shooting.

  The control unit 60 is connected to the media controllers 76a and 76b. The media controller 76a is connected to the memory card 20 loaded in the memory card slot 21a, and the media controller 76b is connected to the memory card 20 loaded in the memory card slot 21b.

  When recording still image data, the control unit 60 controls the media controller 76a to record the still image data on the memory card 20. When recording moving image data, the control unit 60 controls the media controller 76b to store the moving image data. It is recorded on the memory card 20.

  In the playback mode, the control unit 60 controls the media controller 76 to read out still image data or moving image data recorded on the memory card 20, and decompression processing is performed by the digital signal processing unit 73. Thereafter, still image data or moving image data is displayed on the LCD 22 as a reproduced image.

  The digital signal processing unit 73 also performs a through image display process and a photographing process when image data converted into a digital signal is acquired from the lens unit 23.

  Further, the operation unit 18, the detection switch 40, the motor driver 77, and the strobe control unit 78 are connected to the control unit 60. The control unit 60 acquires various operation signals from the operation unit 18 and executes processing corresponding to each operation signal.

  The control unit 60 determines that the lens unit 23 is attached to the camera body 11 when the ON signal is acquired from the detection switch 40. When acquiring the ON signal from the detection switch 40, the control unit 60 controls the motor driver 77 to move the barrier 28 from the shielding position (the position shown in FIG. 5A) to the retracted position (shown in FIG. 5B). Position). Further, in a state where the ON signal is not acquired, the barrier 28 is always in the shielding position (position shown in FIG. 5A).

  The strobe light emitting unit 14 is connected to the strobe control unit 78. The control unit 60 controls the strobe control unit 14 to cause the strobe light emitting unit 14 to emit light.

  Further, a serial driver 80 and a power supply control unit 81 are connected to the control unit 60 via a data bus 69. The control unit 60 controls the serial driver 80 to transmit / receive various operation signals and image data to / from the lens unit 23 via the mount contact 27.

  The power control unit 81 is connected to the battery 82. The power control unit 81 is controlled by the control unit 60, transforms the output voltage of the battery 82 to a predetermined voltage, and supplies power to each unit in the digital camera 10. The power control unit 81 is connected to the mount contact 27 and supplies power to the lens unit 23 via the mount contact 27.

  Next, the electrical configuration of the lens unit 23 will be described. As shown in FIG. 7, the lens unit 23 is provided with a unit control unit 90 that controls each unit in the unit. The unit control unit 90 includes a ROM that stores a control program that controls each unit, and a RAM that temporarily stores work data. The unit controller 90 controls each part based on this control program.

  Motor drivers 91 and 92 are connected to the unit controller 90. The motor driver 91 is connected to the motor 93, and the motor driver 92 is connected to the motor 94. The unit controller 90 controls the motor driver 91 to drive the motor 93, and further controls the motor driver 92 to drive the motor 94.

  The taking lens 24 includes a zoom lens 95 and a focus lens 96. The zoom lens 95 is driven by a motor 93 to move forward and backward along the optical axis, and the zoom magnification is changed. The focus lens 96 is driven by a motor 94 to move forward and backward along the optical axis, and focus adjustment is performed.

  The unit controller 90 is connected to the CCD 25 via a CCD driver 97. The unit controller 90 drives the CCD 25 by controlling the CCD driver 97. The CCD 25 converts the subject image into an electrical signal by photoelectric conversion, and acquires image data that is an analog signal. Further, the CCD 25 is connected to an analog signal processing unit 99, and image data captured by the CCD 25 is output to the analog signal processing unit 99. The analog signal processing unit 99 is connected to the unit control unit 90 via the data bus 100 and is controlled by the unit control unit 90.

  The analog signal processing unit 99 includes a correlated double sampling circuit (CDS), an amplifier (AMP), and the like. After the noise of the image data is removed by the CDS, the analog signal processing unit 99 is amplified by the AMP. The analog signal processing unit 99 outputs image data to the A / D converter 101. The A / D converter 101 converts image data from an analog signal to a digital signal.

  A serial driver 103 and a power supply control unit 104 are connected to the unit control unit 90 via the data bus 100. The unit control unit 90 controls the serial driver 103 and transmits / receives various operation signals and image data to / from the digital camera 10 via the mount contact 105 provided on the back surface of the mount unit 26. That is, the unit control unit 90 controls the serial driver 103 and outputs the image data converted into a digital signal by the A / D converter 101 to the digital camera 10.

  The power control unit 104 is connected to the mount contact 105. The power control unit 104 is supplied with power from the power control unit 81 via the mount contact 105 and the mount contact 27. The unit control unit 90 controls the power supply control unit 104 to supply power to each unit in the lens unit 23.

  The unit control unit 90 acquires a control signal from the control unit 60 via the mount contacts 27 and 105, and controls each unit in the unit based on the control signal.

  Next, photographing processing of the digital camera 10 having the above configuration will be described with reference to the flowchart of FIG. In the description of the shooting process, a case where the still image shooting mode is set will be described as an example. When the digital camera 10 is set to the still image shooting mode, the control unit 60 drives the CCD 32 by controlling the CCD driver 67.

  The control unit 32 determines whether an ON signal is output from the detection switch 40. First, a case where it is determined that an ON signal is output will be described. When the ON signal is output, that is, when the lens unit 23 is attached to the camera body 11, the control unit 60 controls the LCD driver 75 to display the image data captured by the CCD 32 on the LCD 22. Display as.

  Note that this through image is approximately equal to the angle of view of the image captured by the lens unit 23 by a combination of optical zoom and electronic zoom. That is, the control unit 60 acquires the position information of the zoom lens 95 from the lens unit 23, adjusts the position of the zoom lens based on this position information, changes the optical zoom magnification, and further, the digital signal processing unit 73. To change the electronic zoom magnification.

  Thereafter, the control unit 60 determines whether or not the shutter button 16 is half-pressed. If it is determined that the shutter button 16 has not been half-pressed, the standby state is maintained until it is half-pressed. When it is determined that the shutter button 16 is half-pressed, the control unit 60 controls the AF detection circuit 71 and the AE / AWB detection circuit 72 and detects the AF detection value based on the image data captured by the CCD 32. , AE detection value and AWB detection value are detected.

  The control unit 60 controls the lens unit 23 based on these detection values, and performs a focus adjustment process, an exposure control process, and the like. Thereafter, the control unit 60 determines whether or not the shutter button 16 has been fully pressed. When it is determined that the shutter button 16 is not fully pressed, the standby state is maintained until the shutter button 16 is fully pressed.

  When it is determined that the shutter button 16 has been fully pressed, the control unit 60 causes the CCD 25 to acquire image data and record the image data in the memory card 20. Thereby, the photographing process is completed.

  Next, the case where the ON signal is not output, that is, the case where the lens unit 23 is not attached to the camera body 11 will be described. The control unit 60 controls the LCD driver 75 to display the image data captured by the CCD 32 on the LCD 22 as a through image. At this time, the angle of view of the through image is not adjusted.

  Thereafter, the control unit 60 determines whether or not the shutter button 16 is half-pressed. If it is determined that the shutter button 16 has not been half-pressed, the standby state is maintained until it is half-pressed. When it is determined that the shutter button 16 is half-pressed, the control unit 60 controls the AF detection circuit 71 and the AE / AWB detection circuit 72 and detects the AF detection value based on the image data captured by the CCD 32. , AE detection value and AWB detection value are detected.

  The control unit 60 controls the imaging unit 19 based on these detection values, and performs a focus adjustment process, an exposure control process, and the like. Thereafter, the control unit 60 determines whether or not the shutter button 16 has been fully pressed. When it is determined that the shutter button 16 is not fully pressed, the standby state is maintained until the shutter button 16 is fully pressed.

  If it is determined that the shutter button 16 has been fully pressed, the control unit 60 causes the CCD 32 to acquire image data, and causes the memory card 20 to record this image data. Thereby, the photographing process is completed.

  The shooting process in the still image shooting mode has been described above. In the moving image shooting mode, the shooting process is performed using only the CCD 32 regardless of whether the lens unit 23 is mounted or not. Since other processes are the same as those in the still image shooting mode, detailed description thereof is omitted.

  Next, a modified example of the lens unit 23 will be described. A lens unit 110 shown in FIG. 9 includes a photographing lens 111, a half prism 112, a CCD 113, and a CCD 114. The photographing lens 111 includes first to fourth group lenses 111a to 111d. The second group lens 111b is a zooming lens, and is moved forward and backward along the optical axis L1. The fourth group lens 111d is a focusing lens, and is similarly moved forward and backward along the optical axis L1.

  The half prism 112 is an optical member that separates the subject luminous flux that has passed through the photographing lens 111 in two directions, and separates the subject luminous flux into transmitted light and reflected light that is reflected substantially at right angles. On the back side of the half prism 112, a CCD 113 is disposed on the optical path of transmitted light (on the optical axis L1), and on the lower surface side, the optical axis L2 is bent on the optical path of reflected light (bent at a substantially right angle). The CCD 114 is arranged on the top.

  The CCD 113 is used during shooting, and the CCD 114 is used during shooting preparation processing. That is, the CCD 114 is used to output image data for AF detection, AE detection, and AWB detection, and to output through image data. Image data picked up by the CCD 114 is converted into a digital signal and then output to the AF detection circuit 71 and the AE / AWB detection circuit 72 in the digital camera 10. Further, an AF detection circuit and an AE / AWB detection circuit may be provided in the lens unit 110, and image data may be output to them.

  In the lens unit 110, a lens for aligning an image with the CCD 113 may be provided between the half prism 112 and the CCD 114. Furthermore, although the case where a half prism is used as an optical member has been described as an example, the present invention is not limited to this, and for example, a half mirror may be used.

  In this way, two CCDs may be provided in the lens unit. The number of CCDs is not limited to two, and three or more may be provided. For example, a 3CCD system in which incident light is separated into three primary colors by a prism and each light is imaged by another CCD may be used.

  In the above embodiment, the case where the second photographic lens is disposed above the mounting portion has been described as an example. However, the present invention is not limited to this and may be disposed near the left and right of the mounting portion. Moreover, although the case where the image pickup unit is provided on the camera body is described as an example, the image pickup unit may be fixed to the camera body.

  Further, in the above-described embodiment, the case where two loading units on which the storage medium is detachably loaded is provided in the imaging apparatus has been described as an example. However, the present invention is not limited to this, and one loading unit is provided in the imaging apparatus. Alternatively, three or more may be provided. When only one loading unit is provided, both still image data and moving image data may be recorded on one storage medium.

  In the above-described embodiment, the tip of the detection pin is provided so as to protrude from the mounting portion, and when the detection pin is pushed into the mounting portion, the mounting of the lens unit is detected. However, the present invention is not limited to this. Instead, for example, when the mount contact on the imaging apparatus main body side and the mount contact on the lens unit side come into contact and conduct, it may be detected that the lens unit is attached to the imaging apparatus main body.

  Furthermore, although the case where a CCD is used as an image sensor has been described as an example in the above embodiment, the present invention is not limited to this, and a CMOS image sensor may be used, for example. In the above-described embodiment, a digital camera has been described as an example of the imaging apparatus. However, the present invention is not limited to this, and the present invention may be applied to, for example, a digital video camera.

It is a perspective view which shows the structure of the front side of a digital camera. It is a perspective view which shows the structure of the back side of a digital camera. It is explanatory drawing which shows the moving direction of an imaging part. It is explanatory drawing which shows the effect | action of a detection switch. It is explanatory drawing which shows the effect | action of a barrier. It is a block diagram which shows the electric constitution of a digital camera. It is a block diagram which shows the electric constitution of a lens unit. It is a flowchart explaining the imaging | photography process of a digital camera. It is a side schematic diagram showing the composition of the modification of a lens unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Digital camera 11 Camera main body 12 Mount part 19 Imaging part 20 Memory card 23,110 Lens unit 24,31,111 Shooting lens 28 Barrier 30 Detection pin 40 Detection switch 25,32,113,114 CCD
60 control unit 112 half prism

Claims (11)

In an imaging apparatus including a mounting portion on which an interchangeable lens unit having a first photographing lens and a first imaging element is detachably mounted.
A second photographing lens disposed near the mounting portion and exposed to the outside of the imaging device body;
An image pickup apparatus comprising: a second image pickup device that picks up a subject image formed by the second photographing lens.   The imaging apparatus according to claim 1, wherein the second photographing lens is disposed above or near the left and right of the mounting portion.   The imaging unit having the second imaging lens and the second imaging element is provided so as to be movable in a vertical direction or a horizontal direction with respect to the imaging apparatus main body. Imaging device.   The imaging apparatus according to claim 1, wherein the second imaging element is an imaging element having a lower pixel than the first imaging element. Detecting means for detecting that the lens unit is mounted on the mounting portion;
When the mounting of the lens unit is detected by the detection means, the subject image is captured by controlling the second imaging element before the imaging process is performed by the first imaging element. The imaging apparatus according to claim 1, further comprising a control unit that executes imaging preparation processing based on the data.   The shooting preparation process is a focus adjustment process, an exposure control process, a white balance adjustment process, and a through image display process for the first image sensor, and the control unit is configured to perform the focus adjustment process based on the image data, The imaging apparatus according to claim 5, wherein at least one of the exposure control process, the white balance adjustment process, and the through image display process is executed.   When the detection unit detects the mounting of the lens unit, the control unit combines the optical zoom and the electronic zoom to display a through image having a field angle substantially equal to the captured image of the first image sensor on the display unit. The imaging apparatus according to claim 5, wherein the imaging apparatus is displayed.   8. The control unit controls the second image sensor to perform a shooting process when the detection unit detects the mounting of the lens unit and executes moving image shooting. An imaging apparatus according to any one of the above.   The image pickup apparatus main body is provided with two or more loading sections into which a recording medium is detachably loaded, and moving image data is stored in the recording medium loaded in any one of these loading sections. The image pickup apparatus according to claim 1, wherein the image pickup apparatus is recorded.   The mounting portion includes a contact that contacts a contact of the lens mount when the lens unit is mounted, and a shielding member that is movable between a shielding position that covers the contact and a retracted position that retracts from the contact. The imaging apparatus according to claim 1, wherein the imaging apparatus is provided, and the shielding member is moved from the shielding position to the retracted position at the same time as the lens unit is mounted. 11. A plurality of the first image sensors are disposed in the lens unit, and an optical member that divides a subject light flux and guides it to each of the first image sensors is provided. An imaging apparatus according to any one of the above.

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