WO2006080305A1 - 撮像装置及び電子機器 - Google Patents
撮像装置及び電子機器 Download PDFInfo
- Publication number
- WO2006080305A1 WO2006080305A1 PCT/JP2006/301045 JP2006301045W WO2006080305A1 WO 2006080305 A1 WO2006080305 A1 WO 2006080305A1 JP 2006301045 W JP2006301045 W JP 2006301045W WO 2006080305 A1 WO2006080305 A1 WO 2006080305A1
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- WIPO (PCT)
- Prior art keywords
- imaging
- lens
- optical axis
- area
- axis direction
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0035—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having three lenses
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B29/00—Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weapons; Cameras having the shape of other objects
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
- G03B3/02—Focusing arrangements of general interest for cameras, projectors or printers moving lens along baseboard
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
Definitions
- the present invention relates to an imaging device that can be mounted on an electronic device such as a mobile phone or a mobile computer, and an electronic device incorporating the imaging device.
- a small and high-performance imaging device that can be mounted on an electronic device such as a cellular phone is known.
- an imaging lens that forms an optical image of a subject and an imaging lens are known.
- Some are equipped with an image sensor such as a CMOS image sensor that converts the formed optical image into an electrical signal.
- an imaging device there is known an imaging device that can adjust the focus by moving the imaging lens in the optical axis direction (see, for example, Patent Document 1).
- the imaging lens has moved.
- An autofocus (AF) processing function that automatically adjusts the focus by automatically controlling the CPU under the control of the CPU has also been developed!
- a cam having a cam surface that supports an imaging lens from below and has a horizontal plane portion and an inclined surface portion (AF area) continuous with the horizontal plane portion.
- AF area inclined surface portion
- Some of them are configured so that the imaging lens can be moved in the optical axis direction by driving the cam member in a predetermined direction. More specifically, by driving the cam member so that a predetermined abutting portion of the imaging lens is brought into contact with the upper side of the inclined surface portion of the cam member, it is possible to adjust the focal point side force more closely.
- the focal point can be adjusted to the infinitely far side force by bringing the contact portion of the imaging lens into contact with the lower side of the inclined surface portion.
- Patent Document 1 JP-A-10-170809
- a preview image is generally displayed on a display screen when the power is turned on or in a normal imaging state.
- an image having an AF processing function is displayed.
- the imaging lens is positioned at a predetermined in-focus position such as a hyperfocal position between the close range side and the infinity range side based on driving of the cam member! / RU
- the hyperfocal position of the imaging lens between the close range side and the infinity range side, which is fluctuated due to individual variations of the imaging device.
- a predetermined calculation is performed based on the position of the hyperfocal point, or the hyperfocal position force is close to infinity or infinity. It is necessary to store the number of stepping motor pulse signals up to the upper limit in the memory.
- an object of the present invention is to provide an imaging device and an electronic device that can reduce power consumption and cost.
- An imaging lens that forms an optical image of a subject, an imaging element that converts the optical image formed by the imaging lens into an electrical signal, a holding member that holds the imaging lens, and a support that supports the holding member A member, a cam portion provided on any one of the holding member and the supporting member and displacing the imaging lens in the optical axis direction with respect to the imaging element, and any one of the holding member and the supporting member And a driving means for rotating the imaging lens, and when imaging the subject, the driving of the driving means is controlled to move the imaging lens in the direction of the optical axis to automatically adjust the in-focus position of the imaging lens.
- an imaging apparatus comprising autofocus processing means for performing autofocus processing
- the cam portion is a cam portion
- the cam portion is provided, and has a cam surface with which the abutting portion formed in the other portion abuts.
- the imaging lens is connected to the imaging element.
- the cam surface of the cam part that is displaced in the optical axis direction with respect to the AF area for displacing the imaging lens in the optical axis direction with respect to the image sensor by autofocus processing and the horizontal that can be imaged at a fixed focus Standard areas.
- the control related to the positioning of the imaging lens can be simplified, and power consumption Can be reduced.
- the imaging lens With the reference area provided on the cam surface as a reference, it is possible to position the imaging lens so that the imaging lens is properly focused at a distant position and a close position during autofocus processing. . Therefore, the optical image formed by the imaging lens during autofocus processing is properly focused on the imaging element, and the imaging lens is moved in the optical axis direction while the abutting portion is in contact with the AF area of the cam surface. It can be displaced to.
- the number of pulse signals of the drive motor from the predetermined position in the AF area and the predetermined position force of the inclined surface portion to the near area or the far area is stored. It is no longer necessary to provide a memory for this purpose.
- FIG. 1 is a plan view showing an imaging apparatus exemplified as an embodiment to which the present invention is applied.
- 2 is a partially omitted cross-sectional view of the imaging apparatus taken along the line AA in FIG.
- FIG. 3 is a block diagram showing a main part configuration of the imaging apparatus in FIG. 1.
- FIG. 4 is a perspective view showing a cam member provided in the imaging apparatus of FIG. 1.
- FIG. 5 is a diagram schematically showing a cam surface of the cam member in FIG.
- FIG. 6 is a partially omitted cross-sectional view of the imaging apparatus taken along line AA in FIG.
- FIG. 7 is a front view and a rear view showing an example of a mobile phone equipped with an imaging apparatus according to the present invention.
- FIG. 1 is a plan view showing an imaging apparatus 100 exemplified as an embodiment to which the present invention is applied, and FIG. 2 is a partially omitted cross-sectional view of the imaging apparatus 100 taken along line AA in FIG. is there.
- FIG. 3 is a block diagram showing the main configuration of the control system of the imaging apparatus 100.
- the imaging apparatus 100 is configured to be able to execute an autofocus process that automatically adjusts the in-focus position of the lens unit 4, and specifically, as shown in FIGS. , Device case 1, substrate 2 disposed on the lower side of device case 1, image sensor 3 attached to the light source side (upper) surface of substrate 2, and lens for focusing on image sensor 3 Part 4, an outer cylinder part (holding member) 5 that holds the lens part 4, and a cam that supports the outer cylinder part 5 and displaces the outer cylinder part 5 relative to the image sensor 3 in the optical axis direction.
- the substrate 2 also has, for example, a ceramic substrate and the like, and the device case 1 is attached with the lower end in contact with the surface on the light source side.
- a flexible substrate F is connected to a part of the substrate 2.
- the flexible substrate F is electrically connected to the image sensor 3 via predetermined wiring (not shown).
- the image sensor 3 is a photoelectric conversion unit 3a that converts an optical image of a subject formed by the lens unit 4 on the light source side at a predetermined position (for example, the left side in FIG. 2) of the substrate 2 into an electrical signal. It is attached to be arranged. Further, the image pickup device 3 has, for example, a CMOS type image sensor, a CCD type image sensor, or the like, and has an outer shape formed in a substantially rectangular thin plate shape.
- the light source side of the image sensor 3 has a function as a filter that cuts infrared rays or the like, for example, and covers the image sensor 3 so that dust or the like can be prevented from adhering to the image sensor 3.
- One member 31 is provided. Then, on the light source side of the cover member 31, the subject optical A lens unit 4 for forming an image on the photoelectric conversion unit 3a of the image sensor 3 is provided.
- the lens unit 4 includes a first lens 41, a second lens 42, and a third lens 43 (imaging lens) arranged in order from the light source side, and these first lens 41, second lens 42, and The third lens 43 is fixed to an inner peripheral portion of a lens fixing frame portion 44 whose outer shape is formed in a substantially cylindrical shape.
- a diaphragm plate 45 for adjusting the amount of light is disposed between the first lens 41 and the second lens 42, and between the second lens 42 and the third lens 43, An interval regulating member 46 for regulating the interval between the second lens 42 and the third lens 43 is disposed between them.
- the lens portion 4 is externally attached by screwing a male screw portion 44a formed on the outer peripheral portion of the lens fixing frame portion 44 with a female screw portion 5la formed on the inner peripheral portion of the outer cylindrical portion 5. It is arranged inside the cylinder part 5.
- the lens unit 4 can be moved in the optical axis direction by rotating the lens unit 4 around the axis in the optical axis direction with respect to the outer cylinder unit 5, and thereby the lens
- An in-focus state adjustment mechanism that adjusts the in-focus state of part 4 is configured. More specifically, in a state where the contact portion 53a of the outer cylinder portion 5 is in contact with the reference area of the cam member 6 and is positioned in the optical axis direction, the in-focus state of the lens portion 4 using a predetermined chart According to the evaluation situation, the lens unit 4 is screwed and moved in the optical axis direction to adjust the in-focus state of the lens unit 4. In this way, the focus state adjustment mechanism can easily and appropriately adjust the focus state of the lens unit 4 at the reference imaging position.
- the outer tube portion 5 is a member whose outer shape is formed in a substantially cylindrical shape, for example, and an upper annular portion 51 having an internal thread portion 5la formed on the inner peripheral portion, and the upper annular portion 51.
- the pressed portion 52 is pressed against the substrate 2 by the pressing member 11 such as a panel, and is formed continuously to the pressed portion 52, and is in contact with the cam surface 611 of the cam member 6 at the lower end.
- the contact portion 53a is formed so that three lower surface forces of the lower annular portion 53 protrude toward the image sensor 3 side with an interval of approximately 120 °. Further, the protruding length of the contact portion 53a is substantially equal to the height difference of the upper surface of the cam surface 611 of the cam member 6, or is longer than the height difference.
- the upper end of the pressing member 11 is in contact with the lower surface of the upper lid la of the device case 1, for example. Accordingly, the outer cylinder portion 5 is always urged toward the substrate 2 by the pressing member 11.
- a detection wing member 54 for detecting the position of the lens unit 4 in the optical axis direction by the photo interrupter 9 is disposed at a predetermined position of the outer cylinder unit 5.
- FIG. 5 is a perspective view showing the cam member 6, and FIG. 5 is a view schematically showing the cam surface 611 of the cam member 6.
- the cam member 6 is, for example, a substantially annular member. Specifically, the abutting portion 53a is abutted on the upper end so that the outer cylinder portion 5 is located on the lower side. Force An upper cam part (cam part) 61 having a cam surface 611 to be supported, and a lower force of the upper cam part 61 project outward, and a gear is formed on the outer peripheral part. And a lower disk part (pedestal) 62 that is a support member for supporting the outer cylinder part 5.
- the cam surface 611 of the upper cam portion 61 has a reference area 6 la having a horizontal plane extending in a direction substantially orthogonal to the optical axis direction, and a height higher than the reference area 61a.
- the AF area 61e having a wide inclined surface that continuously connects the far-infinite area 61b and the close-up area 61d and the large step area 61f that continuously connects the close-up area 61d and the reference area 61a are spaced approximately 120 ° apart. Is formed.
- the three contact portions 53a of the outer cylindrical portion 5 come into contact with the cam surface 611 of the cam member 6, and the cam member 6 supports the outer cylindrical portion 5 at three points.
- the horizontal plane means a plane perpendicular to the optical axis of the lens.
- the cam member 6 rotates around the axis in the optical axis direction, thereby sliding the abutting portion 53a of the outer cylinder portion 5 along the cam surface 611 of the upper cam portion 61.
- the surface 611 moves, so that the lens portion 4 together with the outer cylinder portion 5 is displaced in the optical axis direction.
- the difference in height of the large step region 61f is, for example, a height at which the level of the pulse signal output from the photo interrupter 9 can be switched by the detection wing member 54. That is, for example, the cam member 6 so that the cam surface 611 moves to the left in FIG. As a result of rotation, the contact portion 53a moves the large step area 61f downward as well. At this time, the pulse signal output from the photo interrupter 9 is switched from the low level (L level) to the high level (H level) based on the relative height difference between the detection blade member 54 and the photo interrupter 9. It ’s like that.
- the reference area 61a is an area for fixing the position of the lens unit 4 in the optical axis direction when power is turned on or when imaging is performed with a fixed focus which is a normal imaging state.
- the lens unit 4 is positioned in the optical axis direction so as to be focused at the normal focus including the overfocus. As a result, for example, it is possible to easily and appropriately adjust the in-focus state of the lens unit 4 without requiring a collimator or the like, and it is possible to more appropriately capture an object at a fixed focus. It becomes.
- the normal focus is a predetermined position set as the best focus within a range of 30 cm to 3 m where imaging frequency is high.
- the reference area 61a positions the lens unit 4 in the optical axis direction with respect to the image sensor 3 so that the lens unit 4 is brought into focus at the far infinity position and the closest position during autofocus processing. It is a reference position for positioning, and a horizontal far-infinite range 61b and a close range 61d are arranged before and after the AF range 61e. That is, the adjustment of the focusing state of the lens unit 4 so that an optical image is formed on the photoelectric conversion unit 3a of the image sensor 3 with the contact portion 53a of the outer cylinder unit 5 in contact with the reference region 61a. As a result, the optical image of the lens unit 4 is formed by the photoelectric conversion unit 3a of the image sensor 3 even when the lens unit 4 is moved to the far infinity position and the closest position during autofocus processing.
- the Rukoto is arranged by the photoelectric conversion unit 3a of the image sensor 3 even when the lens unit 4 is moved to the far infinity position and the closest position during autofocus processing.
- the AF area 61e is an area for displacing the lens unit 4 in the optical axis direction by autofocus processing (described later) under the control of CPUlOa (described later).
- the upper side is the close area 61d side. That is, when the contact portion 53a slides along the AF area 61e, the distance in the optical axis direction of the lens portion 4 with respect to the photoelectric conversion portion 3a of the imaging device 3 can be changed. .
- the cam member 6 is driven so that the abutting portion 53a abuts on the upper side of the AF area 61e so that the focal point can be focused from the closest area 6 Id side.
- the focal point can be adjusted to the far side by bringing the contact part 53a of the lens part 4 into contact with the side. It is like that.
- the lower area of the AF area 61e is an area for positioning the lens unit 4 in the optical axis direction so as to focus at the far imaging position.
- the far region is a region that also has a positional force for focusing on a subject far from the hyperfocal point, and is a region that includes an excessively infinite region.
- the infinitely far region 61b is a region for positioning the lens unit 4 in the optical axis direction so that the lens unit 4 is focused at the infinitely far position.
- the two horizontal parts before and after the AF region Specifically, it is an area where the photographing magnification is positive.
- the hyper-infinity position is on the side opposite to the close range 61d further than the infinity range, and the focal point of the lens unit 4 can be adjusted to the infinity side force more than the original infinity. It has become like this. That is, the refractive index of the predetermined grease constituting the first lens 41, the second lens 42, and the third lens 43 of the lens unit 4 may fluctuate depending on environmental conditions such as temperature and humidity. It becomes impossible to focus at infinity. Therefore, even if the refractive index of the resin fluctuates and it becomes impossible to focus on the infinity force in the normal state, the focusing position can be shifted to the side opposite to the closest region 61d by the excessive infinity region 61b. Thus, the focus can be properly adjusted to infinity.
- the lens can be reliably placed at the super-infinity position regardless of the shape of the tip of the cam follower.
- cam change at the end of the AF area at the end of the AF area becomes gradual, cam wear is prevented and durability is improved.
- the close-up area 61d is an area for positioning the lens unit 4 in the optical axis direction so as to focus at the close-up imaging position. Since the contact portion 53a of the outer cylinder portion 5 is in contact with the close region 61d, the lens portion 4 is extended to the most object side (see FIG. 6). At this time, the distance between the subject and the lens unit 4 is, for example, about 5 to 30 (cm), and an image of the document can be captured over the entire imaging region (photoelectric conversion unit 3a) of the image sensor 3, or the present invention
- the imaging apparatus 100 When the imaging apparatus 100 is mounted on such a cellular phone (described later), the imaging apparatus 100 can be used as a bar code reader.
- the lens is irrelevant to the tip shape of the cam follower. Can be surely placed in the closest position.
- the cam change at the end on the near side of the AF area becomes gradual, preventing cam wear and improving durability.
- the gear of the lower disk portion 62 is meshed with a spur gear portion (not shown) formed on the lower outer peripheral portion of the driving force transmission member 8.
- the driving force transmission member 8 is provided with teeth (not shown) concentrically with the spur gear portion and above the spur gear portion. Combined with a worm 71 fixed on the output shaft!
- the rotational direction of the driving force transmission member 8 is such that when the lens unit 4 is moved from the far imaging position to the closest imaging position, the driving force transmission member 8 is engaged with the worm 71 and the tooth.
- the direction is such that it is biased toward the substrate 2 side. That is, since the lens unit 4 is urged from the light source side to the substrate 2 side by the pressing member 11, when the lens unit 4 is moved in the optical axis direction in the AF area 61e, the driving force transmission member 8 In order to improve the positioning accuracy of the lens unit 4 in the optical axis direction, it is preferable to rotate the lens unit 4 so that the lens unit 4 is biased toward the substrate 2 side.
- the driving force transmission member 8 when an autofocus process (described later) is performed when the lens unit 4 is extended, the driving force transmission member 8 is biased toward the substrate 2 by extending the lens unit 4. On the other hand, when it is executed when the lens unit 4 is retracted, the driving force transmitting member 8 is biased toward the substrate 2 by retracting the lens unit 4. It is preferable to provide teeth.
- the drive motor 7 is, for example, a pulse motor such as a stepping motor, and is configured to step-drive the rotor by a predetermined angle based on the pulse output and input from the CPU10a force. As a result, the cam member 6 is rotated in the predetermined direction around the optical axis direction via the worm 71 and the driving force transmission member 8.
- the control unit 10 is for controlling the autofocus process, and specifically includes a CPU10a, a RAM10b, and a storage unit 10c as shown in FIG.
- the control unit 10, the image sensor 3, the drive motor 7, and the photo interrupter 9 are electrically connected via the bus B.
- the CPU (Central Processing Unit) 10a controls each part of the imaging device 100 in an integrated manner, and reads a predetermined program stored in the storage unit 10c. Expand to the RAMlOb work area and execute various processes according to the program.
- a RAM (Random Access Memory) 10b constitutes a storage area and a work area for programs and data read from the storage unit 10c under the control of the CPU 10a.
- the storage unit 10c includes, for example, a ROM (Read Only Memory), an EEPROM (Electronic Erasable Programmable ROM), and the like, and performs various programs executed under the control of the CPU10a and processes of the programs. This data is stored. Specifically, the storage unit 10c stores, for example, an autofocus processing program cl.
- the autofocus processing program cl causes the CPUlOa as an autofocus processing means to control the driving of the drive motor 7 and to move the outer cylinder portion 5 holding the lens unit 4 in the direction of the optical axis when imaging a subject.
- This program realizes the function of performing autofocus processing for automatically adjusting the in-focus position of the lens unit 4.
- the autofocus process is performed, for example, by rotating the cam member 6 in a predetermined direction and sliding the contact portion 53a of the outer cylinder portion 5 on the cam surface 611 under the control of the CPU10a.
- the image data is acquired by capturing the subject while moving the lens unit 4 between the distant imaging position and the close imaging position.
- CPUlOa sequentially stores the frequency analysis data acquired by performing specific frequency analysis of the acquired image data at a plurality of focus adjustment positions in RAMlOb. Further, CPUlOa evaluates the focus state of the optical image of the subject at the focus adjustment position of the image data based on the frequency analysis data stored in RAMlOb, and focuses the imaging position with the best evaluation value. The position is specified.
- the lens unit 4 is moved in one direction from the far imaging position to the closest imaging position.
- the lens section 4 is provided on the cam surface 611 of the cam member 6.
- the rotational speed of the drive motor 7 per predetermined time in the next AF area 61e may be changed to be slower than the one AF area 61e. That is, a guide for an imaging position with a good evaluation value in one AF area 61e is searched, and the number of pulses from the reference area 61a up to the imaging position that serves as a guide is stored, and based on the number of pulses. Therefore, it is possible to evaluate the in-focus state of the optical image by reducing the rotational speed of the drive motor 7 in the vicinity of the reference image pickup position in the next AF area 61e. You can do it more properly!
- the CPU 10a when “macro mode” is set, the CPU 10a does not execute the autofocus process, and drives the drive motor 7 so as to move the lens unit 4 to the closest region 6 Id. To control!
- the electronic device is, for example, a foldable mobile phone T, and includes an upper housing 12a as a case with a display screen D and a lower housing with an operation button P. 12b is linked via Hinge 12c.
- the imaging device 100 is built below the display screen D on the inner surface side (the side having the display screen D) of the upper housing 12a, and the imaging device 100 can capture the outer surface force light of the upper housing 12a. It is supposed to be.
- the mobile phone T incorporates the imaging device 100, an increase in the size of the mobile phone T can be suppressed, and the subject can be captured according to the distance to the subject, the imaging environment, and the like. Therefore, the mobile phone T with high added value can be obtained.
- the imaging apparatus 100 of the present embodiment when imaging a subject at a fixed focus, the cam member 6 is rotated and the lens portion is placed in the reference area 61a of the cam surface 611. By abutting the abutting portion 53a of the outer cylinder portion 5 that holds 4, the position of the lens portion 4 in the optical axis direction with respect to the imaging element 3 can be fixed. As a result, for example, when imaging a subject with a fixed focus, the lens unit 4 is positioned and positioned at a predetermined position between the near side 6 Id side and the far side of the AF area 6 le and the lens unit 4 is captured. The control related to the positioning of 4 can be simplified, and the power consumption can be reduced.
- the lens unit 4 can be appropriately positioned at the far position and the close position in the autofocus process with reference to the reference area 6la provided on the cam surface 611. That is, when the abutting portion 53a of the outer cylinder portion 5 is in contact with the reference area 61a, the lens portion 4 is moved in the optical axis direction with respect to the outer cylinder portion 5 to thereby bring the lens portion 4 into focus. This adjustment can be performed easily and appropriately.
- the cam member 6 has three points at approximately 120 ° intervals. Since the outer cylinder part 5 is supported, when the lens part 4 is pressed by the subject side force, it is pressed by the cam member 6 as if it is configured to support the outer cylinder part 5 within two points.
- the lens portion 4 is inclined with respect to the optical axis direction depending on the location. That is, the lens portion 4 can be properly supported without requiring a member such as a guide that suppresses the inclination of the lens portion 4.
- the center of gravity of the lens unit 4 can be held at approximately three points, the structure of the imaging device 100 can be made resistant to impact.
- the abutting portion 53a of the outer cylinder portion 5 is moved to the AF of the cam surface 611 while properly focusing the optical image formed by the lens portion 4 on the image sensor 3 during the autofocus process.
- the lens unit 4 can be displaced in the optical axis direction while being in contact with the region 61e.
- a reference position such as a hyperfocal position of the lens unit as in the past or a predetermined position of the AF area 6 le and a close range 6 are used. It is no longer necessary to provide a memory for storing the Id and the number of pulse signals of the drive motor 7 up to the far field. As a result, the imaging device 100 can be reduced in size and cost.
- the lens unit 4 is moved in one direction from the far imaging position to the closest imaging position under the control of the CPU10a, but the lens unit 4 is not limited to this. It may be moved in both directions. That is, the CPU 10a moves the lens unit 4 from the far-field imaging position to the predetermined position of the close-up imaging position, and then reverses the rotation direction of the drive motor 7 to reversely rotate the cam member 6 to rotate the lens unit. 4 may be moved from the closest imaging position to the far imaging position. In this case, for example, it is preferable that the backlash caused by the reverse rotation of the drive motor 7 is taken into account so that the amount of the knocklash is restored.
- the structure other than the components related to the AF process that is, the assembly of the lens unit 4 is performed.
- the lens structure 4 and the lens unit 4 can be assembled and shared by making the adjustment structure of the focusing state at the reference imaging position of the lens unit 4 and the imaging device 100 of the above embodiment common. Operations such as adjusting the in-focus state of the unit 4 can be easily performed in substantially the same manner as that related to the imaging apparatus 100.
- the lower annular portion 53 of the outer cylinder portion 5 is provided with three contact portions 53a, ..., and these contact portions 53a are brought into contact with the cam surface 611 of the cam member 6.
- the force by which the outer cylindrical portion 5 is supported at three points by the cam member 6 The supporting of the outer cylindrical portion 5 is not limited to this, and it is sufficient that the outer cylindrical portion 5 is supported at least at three points.
- the cam member 6 is provided with the contact portion 53 provided on the lower surface of the outer cylinder portion 5 and including the lower disk portion 62 as a pedestal and the upper cam portion 61 as a cam portion.
- the contact part is provided on the upper surface of the pedestal, and the cam part is provided on the lower surface of the outer cylinder part (holding member), and the outer cylinder part is rotated around the axis in the optical axis direction. It is also possible to adopt a configuration in which the lens unit 4 is moved in the optical axis direction.
- the one provided with the contact part may be rotated around the axis in the optical axis direction with respect to the cam part.
- the cam portion and the abutting portion may be configured so as to rotate relatively around the axis in the optical axis direction.
- the mobile phone T is exemplified as the electronic device.
- the present invention is not limited to this, and any electronic device capable of incorporating the imaging device 100 may be used.
- the imaging apparatus according to the present invention in the apparatus main body, as in the above-described embodiment, it is possible to reduce the power consumed when imaging the subject by the imaging lens and to move the imaging lens in the optical axis direction. It is no longer necessary to provide a memory for storing a predetermined position serving as a reference, such as the hyperfocal position of the imaging lens, and the number of pulse signals of a predetermined driving means, thereby reducing the size and cost of the imaging apparatus. Can do.
- the drive motor 7 is exemplified as the drive means.
- the drive motor 7 is not limited to this, and for example, a small actuator such as a piezoelectric element or a shape memory alloy may be used.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Studio Devices (AREA)
- Focusing (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007500517A JPWO2006080305A1 (ja) | 2005-01-31 | 2006-01-24 | 撮像装置及び電子機器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005023915 | 2005-01-31 | ||
JP2005-023915 | 2005-01-31 |
Publications (1)
Publication Number | Publication Date |
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WO2006080305A1 true WO2006080305A1 (ja) | 2006-08-03 |
Family
ID=36740335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/301045 WO2006080305A1 (ja) | 2005-01-31 | 2006-01-24 | 撮像装置及び電子機器 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPWO2006080305A1 (ja) |
KR (1) | KR20070110275A (ja) |
CN (1) | CN101111792A (ja) |
WO (1) | WO2006080305A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2063303A1 (de) * | 2007-11-24 | 2009-05-27 | Leuze electronic GmbH + Co. KG | Optischer Sensor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102833475B (zh) * | 2012-08-17 | 2015-05-20 | 青岛歌尔声学科技有限公司 | 终端设备用摄像头和终端设备用摄像头的实现方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07134236A (ja) * | 1993-11-12 | 1995-05-23 | Olympus Optical Co Ltd | レンズ駆動装置 |
JPH08292351A (ja) * | 1995-04-25 | 1996-11-05 | Minolta Co Ltd | レンズバリア付きカメラ |
JPH1054933A (ja) * | 1996-08-12 | 1998-02-24 | Olympus Optical Co Ltd | 撮影レンズ装置および撮影方法 |
JP2005077826A (ja) * | 2003-09-01 | 2005-03-24 | Minolta Co Ltd | カメラユニット |
JP2005128116A (ja) * | 2003-10-22 | 2005-05-19 | Seiko Precision Inc | 光学モジュール |
JP2006039480A (ja) * | 2004-07-30 | 2006-02-09 | Nidec Copal Corp | レンズ駆動装置 |
-
2006
- 2006-01-24 WO PCT/JP2006/301045 patent/WO2006080305A1/ja not_active Application Discontinuation
- 2006-01-24 CN CNA2006800033653A patent/CN101111792A/zh active Pending
- 2006-01-24 JP JP2007500517A patent/JPWO2006080305A1/ja active Pending
- 2006-01-24 KR KR1020077017108A patent/KR20070110275A/ko not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07134236A (ja) * | 1993-11-12 | 1995-05-23 | Olympus Optical Co Ltd | レンズ駆動装置 |
JPH08292351A (ja) * | 1995-04-25 | 1996-11-05 | Minolta Co Ltd | レンズバリア付きカメラ |
JPH1054933A (ja) * | 1996-08-12 | 1998-02-24 | Olympus Optical Co Ltd | 撮影レンズ装置および撮影方法 |
JP2005077826A (ja) * | 2003-09-01 | 2005-03-24 | Minolta Co Ltd | カメラユニット |
JP2005128116A (ja) * | 2003-10-22 | 2005-05-19 | Seiko Precision Inc | 光学モジュール |
JP2006039480A (ja) * | 2004-07-30 | 2006-02-09 | Nidec Copal Corp | レンズ駆動装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2063303A1 (de) * | 2007-11-24 | 2009-05-27 | Leuze electronic GmbH + Co. KG | Optischer Sensor |
Also Published As
Publication number | Publication date |
---|---|
CN101111792A (zh) | 2008-01-23 |
JPWO2006080305A1 (ja) | 2008-06-19 |
KR20070110275A (ko) | 2007-11-16 |
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