WO2017030048A1 - レンズユニット、カメラおよび電子機器 - Google Patents
レンズユニット、カメラおよび電子機器 Download PDFInfo
- Publication number
- WO2017030048A1 WO2017030048A1 PCT/JP2016/073447 JP2016073447W WO2017030048A1 WO 2017030048 A1 WO2017030048 A1 WO 2017030048A1 JP 2016073447 W JP2016073447 W JP 2016073447W WO 2017030048 A1 WO2017030048 A1 WO 2017030048A1
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- WO
- WIPO (PCT)
- Prior art keywords
- blade
- lens
- lens barrel
- slit
- unit
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims description 39
- 238000003384 imaging method Methods 0.000 claims description 17
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- 238000012986 modification Methods 0.000 description 6
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- 230000005540 biological transmission Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- 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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/02—Diaphragms
-
- 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
- G02B13/003—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 two lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/005—Diaphragms
-
- 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
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- 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
-
- 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
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
-
- 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
-
- 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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/205—Neutral density filters
-
- 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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
- G03B9/12—Two relatively-adjustable aperture-defining members moving as a unit
-
- 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
- H04N23/51—Housings
Definitions
- the present invention relates to a lens unit, a camera, and an electronic device.
- Patent Document 1 discloses a camera (imaging device) mounted on a smartphone.
- This imaging device includes an imaging element and a lens (optical member), and includes a shutter that shields light transmitted to the subject side of the lens.
- the camera provided in the smartphone is designed so that the length in the optical axis direction is shorter than the thickness of the smartphone so as to be within the thickness of the smartphone.
- thinner smartphones are required because of the need for easy carrying. For this reason, a camera with a shorter length in the optical axis direction is required.
- the camera is also required to include a diaphragm blade that adjusts the amount of light transmitted through the lens and the depth of field.
- the lens unit constituting the camera can also move the blade between the lenses, and the length in the optical axis direction. There is a need for something short.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide a lens unit, a camera, and an electronic apparatus that include blades that move forward and backward between lenses and have a short length in the optical axis direction.
- a lens unit includes: A lens barrel holding a plurality of lenses and having a first slit extending in the circumferential direction; A pair of ground planes, each having an opening, stacked to form a vane chamber in between, a portion protruding from the first slit, and the opening positioned between the lenses; Blades disposed in the blade chamber; A blade driving unit fixed to the part of the pair of ground planes, driving the blade, and opening and closing the opening on the blade; Is provided.
- the lens unit can have a pair of ground plates that constitute a blade chamber in which the blades are disposed between the lenses, and can include blades that move forward and backward between the lenses. For this reason, even if the space
- a lens unit is provided with the autofocus function by having the lens barrel drive part which moves a lens barrel to an optical axis direction.
- an outer frame that holds the lens barrel slidable in the optical axis direction is provided.
- the electrode provided on the outer frame and the coil of the electromagnetic actuator provided on the blade driving unit may be electrically connected by a leaf spring.
- the lens barrel includes a second slit facing the first slit across the optical axis,
- the pair of ground planes may be disposed through the first slit and the second slit. By doing in this way, a pair of ground plane becomes difficult to shift from a predetermined position. In addition, the pair of ground planes can be prevented from contacting the lens.
- the blade driving unit is configured by a driving unit base on which an electromagnetic actuator is disposed, and a driving unit cover that covers the electromagnetic actuator,
- the drive unit base and the drive unit cover may sandwich the part of either one or both of the pair of ground planes.
- the blade may be constituted by a diaphragm blade, a light shielding blade, or a blade having an optical filter.
- the lens unit can have a diaphragm function, a shutter function, or a filter function such as an optical ND (Neutral Density) filter.
- a camera provides: The lens unit; An imaging unit that forms a subject image on an imaging surface by the lens provided in the lens barrel.
- a lens unit a camera, and an electronic device that are provided with blades that move forward and backward between the lenses and have a shorter length in the optical axis direction.
- FIG. 4B is a sectional view taken along line BB in FIG. 4B. It is an exploded view which shows the blade
- the camera 101 includes an imaging unit 102 (shown only in FIG. 2) and a lens unit 103, as shown in FIG. 1A, FIG. 1B, and FIG.
- the camera 101 is built in an electronic device such as a smartphone.
- the imaging unit 102 converts the subject image formed on the imaging surface by the lens 104 into an electric signal.
- the imaging unit 102 includes an imaging device such as a CCD (Charge-Coupled Device) type image sensor or a CMOS (Complementary Metal Oxide Semiconductor) type image sensor.
- CCD Charge-Coupled Device
- CMOS Complementary Metal Oxide Semiconductor
- the lens unit 103 includes a lens barrel 11 that holds the lens 104, a base plate 12 (12 ⁇ / b> A, 12 ⁇ / b> B), a diaphragm blade 13, a blade driving unit 14, and an outer frame 15.
- the lens barrel drive unit 16 and the leaf springs 18 (18A, 18B) are provided.
- the base plate 12, the aperture blade 13, and the blade drive unit 14 constitute an aperture unit 20.
- the lens barrel 11 is a barrel that holds a plurality of lenses 104 as shown in FIG.
- the lens barrel 11 includes a first slit 17A extending in the circumferential direction, a second slit 17B facing the first slit 17A across the optical axis, and a coupling portion 19A.
- the first slit 17 ⁇ / b> A is for inserting the base plate 12 from the lens barrel 11 to the outside of the lens barrel 11.
- the tips 21C and 21D of the main plate 12 are inserted through the second slit 17B.
- the coupling unit 19A couples the blade driving unit 14 to the lens barrel 11.
- the ground plane 12 (12 ⁇ / b> A, 12 ⁇ / b> B) is made of a light-impermeable resin member and includes circular openings 22 (22 ⁇ / b> A, 22 ⁇ / b> B).
- the base plates 12A and 12B are overlapped so that the openings 22A and 22B overlap.
- the blade chamber 23 is formed between the main plate 12A and the main plate 12B.
- the base plate 12 (12 ⁇ / b> A, 12 ⁇ / b> B) has a spacer 24 at the edge so that a space is created in the blade chamber 23.
- the base plate 12 is disposed in the lens barrel 11 so that the opening 22 (22 ⁇ / b> A, 22 ⁇ / b> B) is positioned between the lenses 104.
- Part 21A, 21B of the main plate 12 (12A, 12B) protrudes outside the lens barrel 11 from the first slit 17A. Further, the tips 21C and 21D of the base plate 12 are inserted through the second slits 17B, respectively.
- the diaphragm blade 13 is a blade that is disposed in the blade chamber 23, reciprocates, and advances and retreats to the opening 22, and is made of a light-impermeable sheet-like member.
- the diaphragm blade 13 includes a diaphragm opening 25, a hole 26 provided in the root part, and a hole 27 provided in the vicinity of the hole 26.
- a fulcrum pin 38 suspended from a drive unit base 31 described later is inserted into the hole 26.
- the diaphragm blade 13 is pivotally fixed so as to be able to reciprocate with the fulcrum pin 38 as a fulcrum.
- a drive pin 36 described later is inserted into the hole 27.
- the blade drive unit 14 is fixed to a part 21A, 21B of the main plate 12 (12A, 12B), drives the diaphragm blade 13, and opens and closes the opening 22 to the diaphragm blade 13.
- the coil 33, the yoke 34, and the rotor 35 constitute an electromagnetic actuator.
- a coil 33, a yoke 34, a rotor 35, and the like are arranged at predetermined positions.
- the drive unit base 31 includes a bobbin portion provided with a through hole.
- a coil 33 is wound around the bobbin portion.
- the yoke 34 has two legs.
- the tip of the leg portion constitutes a magnetic pole portion. Then, one leg portion of the yoke 34 is inserted into a through hole provided in the bobbin portion.
- the rotor 35 has a cylindrical shape and is composed of a magnet magnetized in two poles in the radial direction. The rotor 35 is disposed at a position sandwiched between the leg portions of the yoke 34, and is fixed to a rotation pin 37 that is suspended from the drive unit base 31. Thereby, the rotor 35 is rotated by the magnetic field generated by the yoke 34.
- the drive pin 36 is attached to the tip of an arm provided on the rotor 35 and is inserted into the hole 27 of the diaphragm blade 13 described above.
- the drive pin 36 transmits the rotational motion of the rotor 35 to the aperture blade 13.
- a fulcrum pin 38 that passes through the hole 26 of the diaphragm blade 13 is suspended from the drive unit base 31.
- the drive unit base 31 includes a coupling unit 19 ⁇ / b> B for coupling to the lens barrel 11.
- the drive unit base 31 and the drive unit cover 32 sandwich the portions 21A and 21B of the main plates 12A and 12B.
- the assembling of the aperture unit 20 is performed as follows. First, the ground plane 12A is disposed on the drive unit base 31 on which the coil 33, the yoke 34, and the rotor 35 are disposed.
- the diaphragm blades 13 are arranged so that the drive pin 36 is inserted through the hole 27 and the fulcrum pin 38 is inserted through the hole 26 thereon.
- a ground plane 12B is disposed thereon.
- the outer frame 15 is a member that holds the lens barrel 11 so that it can slide in the optical axis direction of the plurality of lenses 104.
- the outer frame 15 has a rectangular parallelepiped shape, a circular hole for guiding light is provided on the back surface (surface on the imaging unit 102 side), and the front surface is open. Further, the upper surface is a portion where the lens barrel drive unit 16 is disposed and is open. Further, the lens barrel 11 is provided with a sliding portion 61 and the outer frame 15 is provided with a sliding portion 62 so that the lens barrel 11 slides in the optical axis direction.
- a bearing 63 is disposed between the sliding portion 61 and the sliding portion 62. Further, a cover 64 and a case 65 for covering the opened surface are provided outside the outer frame 15.
- the lens barrel drive unit 16 moves the lens barrel 11 in the optical axis direction with respect to the outer frame 15.
- the lens barrel drive unit 16 includes a magnet 51, a drive coil 52, and a hall sensor 53.
- the magnet 51 is fixed to the lens barrel 11.
- a magnetic shielding member 54 which is a member that prevents leakage of the magnetic field, is disposed.
- the drive coil 52 generates a magnetic field for moving the magnet 51 and is fixed to the outer frame 15. When a current flows through the drive coil 52, a magnetic field is generated. When the magnetic field is generated, the magnet 51 is moved, and the lens barrel 11 is moved in the optical axis direction accordingly.
- the hall sensor 53 is a sensor that detects the distance that the lens barrel 11 has moved, and is disposed on the drive coil 52.
- the magnetic shielding member 55 is a member that prevents magnetic field leakage, and is disposed on the Hall sensor 53.
- the leaf springs 18A and 18B are conductive portions for feeding power from the electrodes provided on the outer frame 15 to the coil 33 of the blade driving portion 14, and have a meandering shape.
- the leaf springs 18A and 18B are disposed on the drive unit cover 32 as shown in FIG.
- the electrodes 41 ⁇ / b> A and 41 ⁇ / b> B are portions connected to electrodes provided on the outer frame 15.
- the plate spring 18A is fixed to the drive unit cover 32 at the electrode 42A and the fixed portion 45, and the electrode 41A and the fixed portion 45 are flexibly bent.
- the leaf spring 18B is fixed to the drive unit cover 32 at the electrode 42B, and is flexibly bent between the electrode 41B and the electrode 42B.
- the electrodes 42A and 42B are electrically connected to conductive lead portions 44A and 44B inserted through the holes 43A and 43B.
- the lead portions 44 ⁇ / b> A and 44 ⁇ / b> B are electrically connected to lead wires extending from the coil 33.
- the smartphone 105 includes an operation unit 106 and a control unit 107 in addition to the camera 101.
- the camera 101 When the operation unit 106 accepts an operation for selecting a shooting mode, the camera 101 enters a shooting standby state.
- the camera 101 captures a live view image of a subject image that has passed through the lens 104 and formed on the imaging unit 102, and the smartphone 105 displays the live view image on a display.
- the control unit 107 supplies current to the drive coil 52 of the lens barrel drive unit 16 based on the live view image being captured, and focuses the lens barrel 11 while moving the lens barrel 11 in the optical axis direction.
- control unit 107 opens and closes the aperture 22 on the aperture blade 13 based on whether or not the luminance of the live view image is equal to or higher than a preset luminance or in response to an operation received by the operation unit 106.
- the diaphragm blades 13 are retracted as shown in FIG.
- the control unit 107 supplies a forward current to the coil 33 when the diaphragm is in a narrowed state.
- a forward current is supplied to the coil 33
- the rotor 35 rotates clockwise as shown in FIG.
- the aperture blade 13 is rotated counterclockwise by the drive pin 36, and the aperture opening 25 moves to the position of the aperture 22.
- the control unit 107 supplies a current in the reverse direction to the coil 33.
- a reverse current is supplied to the coil 33, the rotor 35 rotates counterclockwise.
- the aperture blade 13 is rotated clockwise by the drive pin 36 and returns to the retracted position shown in FIG.
- control unit 107 adjusts the focus and operates the diaphragm blade 13 in a state where the live view image is displayed on the display.
- the control unit 107 sends a reset signal to the image sensor.
- the reset signal is sent, the accumulated charge is discharged, and the image pickup device starts imaging by starting accumulation of new charge.
- the charge accumulated in the image sensor is transferred to the storage device of the smartphone 105 as image information.
- the live view image is captured, and the control unit 107 displays the live view image on the display of the smartphone 105.
- the base plate 12 (12A, 12B) is disposed between the lenses 104, and the aperture blade 13 is provided in the blade chamber 23 between the base plates 12 (12A, 12B). It is done. With this configuration, it is possible to provide blades that move forward and backward between the lenses 104. Moreover, if the space
- the lens barrel 11 is provided on the outer frame 15 so as to be slidable in the optical axis direction, and includes a lens barrel drive unit 16 that moves the lens barrel 11 in the optical axis direction.
- the camera 101 can have an autofocus function.
- the electrode of the outer frame 15 and the coil 33 of the blade driving unit 14 are electrically connected by the leaf spring 18. For this reason, electric power can be supplied from the electrode of the outer frame 15 to the coil 33 of the blade driving unit 14, and the load when the lens barrel 11 slides in the optical axis direction can be reduced. As a result, the lens barrel 11 slides smoothly and can be focused quickly.
- the leaf spring 18 is flexibly bent, the optical axis of the lens barrel 11 can be prevented from being inclined. As a result, it is possible to prevent image quality deterioration due to the tilt of the optical axis of the lens 104.
- the member that electrically connects the lens barrel 11 and the outer frame 15 is not particularly limited as long as it can be electrically connected.
- a suspension wire 71 that is a linear (wire-like) metal spring may be used.
- a member that is electrically connected to a narrow space can be arranged.
- a coil spring 72 in which a wire is wound around a cylindrical spiral may be used. In this case, the spring constant can be further reduced.
- FIG. 10A a suspension wire 71 that is a linear (wire-like) metal spring may be used.
- a coil spring 72 in which a wire is wound around a cylindrical spiral may be used. In this case, the spring constant can be further reduced.
- FPC Flexible Printed Circuits
- FFC Flexible Flat Cable
- the insulation can be increased compared to the case where a spring is used.
- the lens-barrel drive part 16 can be designed small compared with the case where both the base plates 12A and 12B are pinched.
- the camera 101 may include a light-shielding blade (shutter blade) that blocks light transmission.
- the control unit 107 of the smartphone 105 retracts the shutter blade, captures a live view image of the subject image, and displays the live view image on the display of the smartphone 105.
- a reset signal is sent to the image sensor, the accumulated charge is discharged, and shooting is started by starting the accumulation of a new charge.
- the shutter blades are closed, and the electric charge accumulated in the image sensor is transferred to the storage device of the smartphone 105 as image information. Thereafter, the control unit 107 retracts the shutter blades and returns to the shooting standby state.
- the camera 101 can transfer the charge accumulated in the image sensor to the storage device with the shutter blade closed, so that noise in the image can be reduced.
- the aperture blade 13 may be replaced with an optical filter such as an ND filter, an IR (InfraRed) transmission filter, an IR cut filter, for example.
- an optical filter such as an ND filter, an IR (InfraRed) transmission filter, an IR cut filter, for example.
- the ND filter When used, the amount of light can be reduced when the subject is too bright.
- an IR transmission filter When an IR transmission filter is used, an infrared photograph can be taken.
- the IR cut filter is used, a photograph from which infrared rays are removed can be taken.
- the camera 101 is an electronic device other than the smartphone (for example, a portable terminal such as a tablet PC, a personal computer such as a notebook PC or a desktop PC). , A wearable terminal such as a wristwatch type terminal, or a portable game device).
- the camera 101 includes one diaphragm blade 13 has been described.
- the camera 101 may include two or more diaphragm blades 13.
- a shutter blade and an optical filter may be provided. By doing in this way, the quality of the image imaged with the camera 101 further improves.
- the lens barrel driving unit 16 performs the vertical line from the blade driving unit 14 to the optical axis and the vertical line from the lens barrel driving unit 16 to the optical axis when viewed from the optical axis direction.
- the angle is arranged to be 180 °
- the narrow angle formed by the perpendicular line from the blade drive unit 14 to the optical axis and the perpendicular line from the lens barrel drive unit 16 to the optical axis is 90 ° or more and 180 °. It may be less.
- the present invention can be suitably used as a lens unit provided in a camera of an electronic device (for example, a mobile terminal such as a smartphone or a tablet PC, or a personal computer such as a laptop computer or a desktop personal computer).
- a mobile terminal such as a smartphone or a tablet PC
- a personal computer such as a laptop computer or a desktop personal computer.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Devices (AREA)
- Lens Barrels (AREA)
- Diaphragms For Cameras (AREA)
- Shutters For Cameras (AREA)
- Blocking Light For Cameras (AREA)
Abstract
Description
複数のレンズを保持し、周方向に延びる第1のスリットを有するレンズ鏡筒と、
それぞれ開口部を有し、重ねられて間に羽根室を構成し、一部が前記第1のスリットから突出し、前記開口部が前記レンズの間に位置するように配置される一対の地板と、
前記羽根室に配置された羽根と、
前記一対の地板の前記一部に固定され、前記羽根を駆動し、該羽根に前記開口部を開閉させる羽根駆動部と、
を備える。
このようにすることで、レンズユニットは、レンズ鏡筒を光軸方向に移動させる鏡筒駆動部を有することにより、自動焦点機能を備える。
前記外枠に設けられた電極と前記羽根駆動部に設けられた電磁アクチュエータのコイルとが板バネで電気的に接続されてもよい。
このようにすることで、レンズ鏡筒が光軸方向に移動させられるときの負荷を小さくできる。このため、レンズ鏡筒がスムーズに移動させられ、焦点が迅速に合わせられる。また、電気的に接続される部分にかかる力を小さくできるため光軸が傾くことを防止できる。
前記一対の地板が、前記第1のスリットおよび前記第2のスリットを挿通して配置されもよい。
このようにすることで、一対の地板が、所定位置からずれにくくなる。また、一対の地板が、レンズに接触することを防止できる。
前記駆動部ベースと前記駆動部カバーとが、前記一対の地板のいずれか一方または両方の前記一部を挟持してもよい。
このようにすることで、一対の地板が羽根駆動部に安定して固定される。また、一対の地板と羽根駆動部とが容易に組み立てられる。
このようにすることで、レンズユニットが絞り機能、シャッタ機能、または光学ND(Neutral Density)フィルタなどのフィルタの機能を備えることができる。
前記レンズユニットと、
前記レンズ鏡筒に設けられた前記レンズにより撮像面に被写体像が結像される撮像部と、を備える。
前記カメラを備える。
上述の実施の形態のカメラ101では、レンズ鏡筒11と外枠15とが、板バネ18で電気的に結合される場合について説明した。本実施の形態のカメラ101では、レンズ鏡筒11と外枠15とを電気的に接続する部材は、電気的に接続できるものであれば特に限定されない。例えば、図10Aに示すように、線状(針金状)の金属のバネであるサスペンションワイヤ71でもよい。この場合、狭い空間に電気的に接続する部材を配置できる。また、図10Bに示すように、針金を円柱状の螺旋に巻いたコイルバネ72でもよい。この場合、ばね定数をより小さくできる。また、図10Cに示すように、平板状の導体を絶縁体で被覆したFFC(Flexible Flat Cable)などのFPC(Flexible Printed Circuits)73でもよい。この場合、バネを用いた場合に比べて絶縁を高めることができる。
12、12A、12B 地板
13 絞り羽根
14 羽根駆動部
15 外枠
16 鏡筒駆動部
17A 第1のスリット
17B 第2のスリット
18、18A、18B 板バネ
19A、19B 結合部
20 絞りユニット
21A、21B 一部
21C、21D 先
22、22A、22B 開口部
23 羽根室
24 スペーサー
25 絞り用開口部
26、27 孔
31 駆動部ベース
32 駆動部カバー
33 コイル
34 ヨーク
35 回転子
36 駆動ピン
37 回転ピン
38 支点ピン
39A 凸部
39B 穴
41A、41B、42A、42B 電極
43A、43B 孔
44A、44B リード部
45 固定部
51 マグネット
52 駆動コイル
53 ホールセンサ
54、55 防磁部材
61、62 摺動部
63 ベアリング
64 カバー
65 ケース
71 サスペンションワイヤ
72 コイルバネ
73 FPC
101 カメラ
102 撮像部
103 レンズユニット
104 レンズ
105 スマートフォン
106 操作部
107 制御部
Claims (8)
- 複数のレンズを保持し、周方向に延びる第1のスリットを有するレンズ鏡筒と、
それぞれ開口部を有し、重ねられて間に羽根室を構成し、一部が前記第1のスリットから突出し、前記開口部が前記レンズの間に位置するように配置される一対の地板と、
前記羽根室に配置された羽根と、
前記一対の地板の前記一部に固定され、前記羽根を駆動し、該羽根に前記開口部を開閉させる羽根駆動部と、
を備える、レンズユニット。 - 前記複数のレンズの光軸方向に前記レンズ鏡筒を移動する鏡筒駆動部を備える、
請求項1に記載のレンズユニット。 - 前記光軸方向にスライド可能に前記レンズ鏡筒を保持する外枠を備え、
前記外枠に設けられた電極と前記羽根駆動部に設けられた電磁アクチュエータのコイルとが板バネで電気的に接続される、
請求項2に記載のレンズユニット。 - 前記レンズ鏡筒が、前記第1のスリットに光軸を挟んで対向する第2のスリットを備え、
前記一対の地板が、前記第1のスリットおよび前記第2のスリットを挿通して配置される、
請求項1から3の何れか1項に記載のレンズユニット。 - 前記羽根駆動部が、電磁アクチュエータが配置された駆動部ベースと、前記電磁アクチュエータを覆う駆動部カバーと、から構成され、
前記駆動部ベースと前記駆動部カバーとが、前記一対の地板のいずれか一方または両方の前記一部を挟持する、
請求項1から4の何れか1項に記載のレンズユニット。 - 前記羽根は、絞り羽根、遮光羽根、または光学フィルタを有する羽根から構成される、
請求項1から5の何れか1項に記載のレンズユニット。 - 請求項1から6の何れか1項に記載のレンズユニットと、
前記レンズ鏡筒に設けられた前記レンズにより撮像面に被写体像が結像される撮像部と、を備えるカメラ。 - 請求項7に記載のカメラを備える電子機器。
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US20180341166A1 (en) | 2018-11-29 |
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