WO2007052606A1 - カメラ - Google Patents
カメラ Download PDFInfo
- Publication number
- WO2007052606A1 WO2007052606A1 PCT/JP2006/321655 JP2006321655W WO2007052606A1 WO 2007052606 A1 WO2007052606 A1 WO 2007052606A1 JP 2006321655 W JP2006321655 W JP 2006321655W WO 2007052606 A1 WO2007052606 A1 WO 2007052606A1
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- WO
- WIPO (PCT)
- Prior art keywords
- axis direction
- lens
- optical axis
- group
- lens group
- Prior art date
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Classifications
-
- 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
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
- G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
- G02B15/1451—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being positive
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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
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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
- G03B19/00—Cameras
- G03B19/02—Still-picture cameras
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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
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2101/00—Still video cameras
Definitions
- the present invention relates to a camera, and more particularly to a camera including a bending optical system.
- CCD Charge Coupled Device
- CMOS Complementary Metal
- Digital cameras that use an image sensor such as a sensor to convert an optical image into an electrical signal and digitally record the electrical signal are widely used.
- an image sensor such as a sensor to convert an optical image into an electrical signal and digitally record the electrical signal
- high performance is also required for a lens barrel that forms an optical image on such an image sensor just by increasing the number of pixels of a CCD or CMOS sensor.
- a lens barrel equipped with a zoom lens system with higher magnification there is a need for a lens barrel equipped with a zoom lens system with higher magnification.
- Patent Document 1 discloses a bending optical system that bends an optical path using a reflecting mirror.
- the lens barrel disclosed in Patent Document 1 includes a first lens group and a second lens group in order from the subject side on the subject side of the reflecting mirror, and the reflecting mirror on the imaging element side of the reflecting mirror.
- a third lens group and a fourth lens group are provided in order of lateral force.
- the first lens group is fixed.
- the second lens group and the third lens group are movable in the optical axis direction, and constitute a zoom lens system in cooperation with each other.
- the fourth lens group is a lens for force adjustment.
- Patent Document 2 discloses a bending optical system that bends an optical path using a prism.
- the lens barrel disclosed in Patent Document 2 includes a lens group on the subject side of the prism.
- the lens group can move in the optical axis direction between the use position and the storage position It is.
- the prism is movable so as to secure the storage space.
- Patent Document 3 discloses a configuration of a lens group used in a bending optical system.
- Patent Document 1 Japanese Patent Laid-Open No. 11-258678
- Patent Document 2 Japanese Patent Laid-Open No. 2003-169236
- Patent Document 3 Japanese Patent Application Laid-Open No. 2004-102089
- an object of the present invention is to provide a camera that achieves both a high-magnification zoom lens system and a reduction in the size of the apparatus.
- a camera as a first invention includes a first lens group, a bending means, at least one lens frame, a second lens group, an imaging means, a lens barrel, and a casing.
- the first lens group takes in a light beam incident along the first optical axis.
- the bending means bends the light beam incident along the first optical axis in a direction along the second optical axis that intersects the first optical axis.
- the lens frame holds the first lens group and relatively moves the first lens group and the bending means in the direction along the first optical axis.
- the second lens group takes in the light beam bent by the bending means.
- the imaging means receives the light beam that has passed through the second lens group.
- the lens barrel movably supports the lens frame, and a bending means, a second lens group, and an imaging means are arranged.
- the casing holds the lens barrel.
- the phrase “along the second optical axis” means, for example, parallel to the second optical axis.
- the bending means includes, for example, a member having a reflecting surface, and more specifically, may include a prism, a mirror, and the like.
- the imaging means may be, for example, a CCD or CMOS that receives light electrically, but is not limited thereto, and may be a film or the like.
- the relative position between the first lens group and the bending means is changed by the lens frame.
- the relative position along the optical path between the first lens group and the imaging means is changed by the lens frame.
- the optical path length to the first lens group force imaging means can be increased by the lens frame, so that a high-magnification zoom lens system can be configured.
- the camera of the present invention employs a bending optical system. For this reason, an optical system having the same optical path length can be configured more compactly than a camera that does not employ a bending optical system.
- the camera of the present invention when imaging is performed so that the vertical direction of the subject is aligned with the vertical direction of the captured subject image (hereinafter, such imaging is referred to as a normal imaging state). ),
- the direction along the second optical axis coincides with the horizontal direction.
- the camera of the present invention in the normal imaging state, it is possible to perform imaging by making the longitudinal direction of the camera coincide with the horizontal direction. It is possible to provide a camera having a smaller vertical dimension in a normal imaging state than a camera that performs the above.
- a camera as a second invention includes a first lens group, a bending means, at least one lens frame, a second lens group, an imaging means, a lens barrel, and a casing.
- the first lens group takes in a light beam incident along the first optical axis.
- the bending means bends the light beam incident along the first optical axis in a direction along the second optical axis that intersects the first optical axis.
- the lens frame holds the first lens group and the first lens in the direction along the first optical axis.
- the needle group and the bending means are moved relative to each other.
- the second lens group takes in the light beam bent by the bending means.
- the imaging means receives the light beam that has passed through the second lens group.
- the lens barrel movably supports the lens frame, and a bending means, a second lens group, and an imaging means are arranged.
- the casing holds the lens barrel and is provided with visual recognition means for visually recognizing an image captured by the imaging means.
- the direction along the second optical axis and the long side direction of the visual recognition means are substantially parallel.
- the bending means includes, for example, a member having a reflecting surface, and more specifically, may include a prism, a mirror, and the like.
- the imaging means may be, for example, a CCD or CMOS that receives light electrically, but is not limited thereto, and may be a film or the like.
- the visual recognition means is, for example, an optical or electronic viewfinder.
- the relative position between the first lens group and the bending means is changed by the lens frame.
- the relative position along the optical path between the first lens group and the imaging means is changed by the lens frame.
- the optical path length to the first lens group force imaging means can be increased by the lens frame, so that a high-magnification zoom lens system can be configured.
- the camera of the present invention employs a bending optical system. For this reason, an optical system having the same optical path length can be configured more compactly than a camera that does not employ a bending optical system.
- the long side direction of the visual recognition means and the direction along the second optical axis are substantially parallel.
- the dimension in the direction perpendicular to the first optical axis and the second optical axis can be made smaller than the dimension in the direction along the second optical axis. For this reason, even in a casing that holds such a lens barrel, the direction along the second optical axis is often the longitudinal direction of the casing.
- the second optical axis is a visual recognition means. As compared with a camera substantially parallel to the short side direction, the size of the camera in the short side direction of the visual recognition means can be reduced.
- a camera according to a third invention is the first or second invention, and a plurality of lens frames are provided.
- the camera of the present invention includes a plurality of lens frames, for example, arranged in multiple stages. Therefore, the lens frame can increase the optical path length from the first lens group force to the image pickup means, so that a zoom lens system with a high magnification can be configured.
- a camera according to a fourth invention is any one of the first to third inventions, wherein a gripping means for gripping is provided on the imaging means side in the direction along the second optical axis of the casing. ing.
- the gripping means is provided on the imaging means side in the direction along the second optical axis. Therefore, it is possible to ensure the distance between the lens frame that holds the first lens group and the gripping means. As a result, it is possible to prevent force on the first lens group during photographing.
- a camera according to a fifth aspect of the present invention is any one of the first to fourth aspects, wherein the lens frame protrudes toward the subject side from the subject side surface of the casing when the subject is imaged.
- the lens frame protrudes toward the subject side from the subject side surface of the casing when imaging the subject. For this reason, it is possible to prevent the first lens group from being caught during photographing.
- a camera according to a sixth invention is any one of the first to fifth inventions, further comprising image blur correction means for holding the second lens group movably in a direction perpendicular to the second optical axis. I have.
- the camera of the present invention comprises image blur correction means while enabling the size of the camera in a direction orthogonal to the first optical axis and the second optical axis (for example, the short side direction of the visual recognition means) to be reduced. Therefore, higher quality imaging can be performed.
- a camera according to a seventh invention is any one of the first to sixth inventions, wherein the bending means reflects a light beam incident along the first optical axis in a direction along the second optical axis. Make the reflective surface And the relative position with respect to the imaging means is fixed.
- the relative position between the bending means and the imaging means is fixed, and it becomes possible to obtain more accurate optical performance.
- the camera according to an eighth invention is any one of the first to seventh inventions, wherein the lens barrel has dimensions in the direction along the first optical axis, the first optical axis and the second optical axis. It is smaller than the dimension in the direction perpendicular to the optical axis.
- the camera of the present invention it is possible to provide a camera in which the thickness in the direction along the first optical axis is thin.
- FIG. 3 is a perspective view schematically showing the configuration of the main body.
- FIG. 10 is an exploded perspective view of the first group frame unit.
- FIG. 12 is an exploded perspective view of the second group frame unit.
- FIG. 16 is a perspective view showing an assembled state of the third group frame unit and the base unit.
- FIG. 26 is an explanatory diagram for explaining the operation of the lens barrel.
- FIG. 27 is an explanatory diagram for explaining the positional relationship between the second group frame unit and the third group frame unit.
- FIG. 28 is an explanatory diagram for explaining the positional relationship between the second group frame unit and the third group frame unit.
- FIG. 29 is an explanatory diagram for explaining the positional relationship between the second group frame unit and the third group frame unit.
- FIG. 30 is a front view and a perspective view showing the appearance and configuration of a digital camera as a modification.
- the digital camera of the present invention employs a bending optical system in the optical system and
- the lens barrel is formed so as to be extended in multiple stages. This makes it possible to achieve both a high-power zoom lens system and a compact device.
- FIGS. 1-10 A digital camera according to a first embodiment of the present invention will be described with reference to FIGS.
- FIG. 1 is a perspective view showing an appearance of the digital camera 1 according to the first embodiment of the present invention.
- the digital camera 1 includes an imaging device 2 and a main body 3.
- the imaging device 2 has a bending optical system that guides the light beam incident along the first optical axis A1 to the imaging device by bending the light beam in the direction along the second optical axis A2 orthogonal to the first optical axis A1. I have.
- the main body 3 houses the imaging device 2 and controls the imaging device 2 and the like.
- the configuration of the main body 3 will be described.
- the six surfaces of the digital camera 1 are defined as follows.
- the side facing the subject is the front side, and the opposite side is the back side.
- Vertical direction of the subject and a rectangular image captured by the digital camera 1 (generally, the vertical direction of the aspect ratio (ratio of long side to short side) is 3: 2, 4: 3, 16: 9, etc.)
- the surface facing upward in the vertical direction is the top surface, and the opposite surface is the bottom surface.
- the surface on the left side of the subject side force is the left side
- the opposite side is the right side.
- FIG. 1 is a perspective view showing the front, top and left sides.
- each constituent member arranged in the digital camera 1 connecting only the six surfaces of the digital camera 1 are defined in the same manner. In other words, the above definition is applied to the six surfaces of each constituent member arranged in the digital camera 1.
- a three-dimensional orthogonal coordinate system (right-handed system) having a Y axis parallel to the first optical axis A1 and an X axis parallel to the second optical axis A2 is defined.
- the first optical axis A The direction toward the front side along 1 is the Y-axis positive direction, and the direction from the right side to the left side along the second optical axis A2 is the X-axis positive direction.
- the direction toward the bottom surface side force and the top surface side along the orthogonal axis orthogonal to the first optical axis A1 and the second optical axis A2 is the Z axis positive direction.
- FIG. 2 is a perspective view showing the external appearance of the back surface, top surface, and right side surface of the digital camera 1.
- FIGS. 3A to 3C are perspective views schematically showing the configuration of the main body 3.
- Fig. 3 (a) is a perspective view showing the configuration of the members arranged on the Y axis direction positive side (front side), and Fig. 3 (b) is arranged on the Z axis direction negative side (bottom side).
- FIG. 3 (c) is a perspective view showing a configuration of a member arranged on the Y axis direction negative side (back side).
- the main body 3 includes an exterior part 11 and a grip part 12 that form a casing for housing the imaging device 2, a strobe 15 disposed on the surface of the exterior part 11, and a release button 16. , Operation dial 17 and image display unit 18, main capacitor 20, sub-board 21, battery 22, main board 23, and memory card 24, which are arranged inside the casing composed of exterior part 11 and grip part 12 Consists mainly of.
- the exterior part 11 is a substantially rectangular parallelepiped housing that is long in the direction of the second optical axis A2, and on the positive side in the X-axis direction is a grip part for the photographer to hold during shooting.
- 12 is arranged so as to protrude from the exterior part 11 in the Y-axis direction.
- the exterior portion 11 and the grip portion 12 constitute a substantially L-shaped hollow casing.
- a fixed frame 52 (see FIG. 9) of the imaging device 2 described later projects a part of the cylindrical part 125 (see FIG. 10) to the Y axis direction positive side.
- a strobe 15 is disposed on the front surface of the exterior part 11.
- the flash unit 15 flashes as necessary to illuminate the subject and assists exposure when the subject is dark.
- a release button 16 and an operation dial 17 are arranged on the grip 12 side of the upper surface of the exterior part 11. Release button 16 is used when Z is Pressed toward the negative side in the axial direction.
- the operation dial 17 is used for various settings such as shooting operation settings.
- an image display unit 18 is provided on the back surface of the exterior unit 11 as a visual recognition means for allowing a photographer to visually recognize an image photographed by the imaging device 2.
- the image display unit 18 has, for example, a rectangular outer shape with aspect ratios (ratio of long side to short side) of 3: 2, 4: 3, 16: 9, and the long side direction is It is provided so as to be substantially parallel to the direction along the second optical axis A2 (X-axis direction).
- 1 and 2 show only main members arranged on the surface of the exterior portion 11, and members other than those described may be provided.
- the imaging device 2 that is long in the second optical axis A2 direction (positive side in the X-axis direction) It is arranged along the longitudinal direction of 11.
- the imaging device 2 is arranged in the main body 3 with the first group frame unit 41 holding the first lens group G1 facing the subject set to the X axis direction negative side. As a result, the X-axis direction distance from the first lens group G1 to the grip portion 12 is secured.
- a strobe 15, a main capacitor 20, and a sub board 21 are disposed on the positive side in the Z-axis direction of the imaging device 2.
- the main capacitor 20 gives flash energy to the strobe 15 by charging from a battery 22 described later.
- the sub board 21 transforms electric power from a battery 22 (to be described later) as necessary, and controls the strobe 15.
- a battery 22 is disposed as a power source for operating the digital camera 1.
- the main substrate 23 is disposed on the Y axis direction negative side of the imaging device 2.
- an image processing circuit for processing an image signal from the imaging device 2, a control circuit for controlling the imaging device 2, and the like are mounted on the main board 23 .
- a memory card 24 is arranged on the negative side of the battery 22 in the Y-axis direction. The memory card 24 records the image signal from the imaging device 2.
- the imaging device 2 is formed such that its Z-axis direction width (Wz) is larger than its Y-axis direction width (Wy). ⁇ 3: About the imaging device>
- the configuration of the imaging device 2 mounted on the digital camera 1 will be described with reference to FIG.
- FIG. 4 is an assembled perspective view of the imaging device 2.
- 4 (a) is a perspective view showing the front, top and left sides of the imaging device 2
- FIG. 4 (b) is a perspective view showing the front, top and right sides of the imaging device 2.
- FIG. 4 (a) is a perspective view showing the front, top and left sides of the imaging device 2
- FIG. 4 (b) is a perspective view showing the front, top and right sides of the imaging device 2.
- the imaging device 2 includes a lens barrel 31 having an optical system 35, a motor unit 32 having a zoom motor 36 for driving the lens barrel 31, and a CCD 37 as an imaging means for receiving a light beam that has passed through the lens barrel 31.
- the CCD unit 33 has power and is also configured.
- the lens barrel 31 is characterized in that it has a multistage retractable lens frame that can be extended and retracted in multiple stages in the direction of the first optical axis A1, and optically, It is characterized in that it has an optical system 35 constituting a bending optical system.
- the optical system 35 includes five groups of twelve optical elements (lenses and prisms) that realize high-power zoom (for example, optical zoom of about 6 to 12 times) exceeding optical 3 times zoom.
- the motor unit 32 includes, for example, a zoom motor 36 such as a DC motor, a flexible printed circuit board (FPC) (not shown) that electrically connects the zoom motor 36 to the main board 23 (see FIG. 3), a zoom motor It is mainly composed of a photosensor (not shown) provided to measure the position of the lens in the lens barrel 31 from the origin through measurement of the motor rotation number 36.
- the zoom motor 36 drives the lens barrel 31 and moves the optical system 35 between the wide-angle end and the telephoto end.
- the optical system 35 provided in the lens barrel 31 operates as a zoom lens system that changes the imaging magnification of the light beam in the CCD 37.
- the photosensor operates as follows.
- the photosensors are a pair of transmission type photosensors that are provided to enter from outside the motor box (gear bot).
- a photosensor has a U-shaped outer shape, and a pair of light-emitting elements and light-receiving elements are provided at opposite ends. Yes.
- a gear directly connected to the zoom motor 36 passes between the light emitting element and the light receiving element, and by measuring the number of times the gear blocks between the light emitting element and the light receiving element per unit time. The rotation speed of the zoom motor can be measured without contact.
- the CCD unit 33 receives the light beam that has passed through the lens barrel 31 and converts it into an electrical signal, the CCD sheet metal 38 for fixing the CCD 37 to the lens barrel 31, and the CCD 37 on the main substrate 23 ( It is mainly composed of FPC (not shown) that is electrically connected to (see Fig. 3).
- FIG. 5 to 8 show the configuration of the optical system 35 provided in the lens barrel 31.
- FIG. 5 to 6 show the arrangement of the optical system 35 when the optical system 35 is located at the wide angle end.
- 7 to 8 show the arrangement of the optical system 35 when the optical system 35 is located at the telephoto end.
- 5 and 7 show the arrangement of the optical system 35 viewed from the same viewpoint as FIG. 6 and 8 are cross-sectional views in a plane including the optical axis of the optical system 35 shown in FIGS.
- the optical system 35 includes, in order from the subject side, the first lens group Gl, the second lens group G2, the exposure adjustment member St (see FIG. 6 or FIG. 8), and the third lens group. Consists of G3, 4th lens group G4, 5th lens group G5 and IR filter F1 (see Fig. 6 or 8). Luminous power incident from 1st lens group G1 Each lens group G1 to G5 and IR It is configured to pass through the filter F1 and be guided to the CCD 37. Each lens group G1 to G5 constitutes a zoom lens system by changing the distance between the respective lens groups.
- the first lens group G1 is a lens group having a positive power as a whole.
- the first lens L1, the second lens L2, and the third lens are arranged in order from the subject side on the first optical axis A1. With lens L3.
- the first lens L1 is a concave meniscus lens having a convex surface facing the subject.
- the second lens L2 is a plano-convex lens having a convex surface facing the subject.
- the third lens L3 is convex on the subject side Is a convex meniscus lens.
- the second lens group G2 is a lens group having a negative power as a whole, and a fourth lens L4 disposed on the first optical axis A1 and a light beam incident along the first optical axis A1.
- the fourth lens L4 is a concave meniscus lens having a convex surface facing the subject.
- the prism L5 is a reflecting surface L5a that reflects the light beam incident along the first optical axis A1 in the direction along the second optical axis A2 substantially orthogonal to the first optical axis A1 (see FIG. 6 or FIG. 8). )have.
- the prism L5, particularly the internal reflection prism is used, but any of a surface reflection prism, an internal reflection mirror, and a surface reflection mirror having the same function may be adopted.
- the sixth lens L6 is a biconcave lens.
- the seventh lens L7 is a biconvex lens.
- the exposure adjustment member St (see FIG. 6 or FIG. 8) is disposed on the second optical axis A2, and is a member such as a diaphragm or a shutter that adjusts the amount of light incident on the CCD 37 along the second optical axis A2. It is.
- the third lens group G3 is a lens group having a positive power as a whole, and includes an eighth lens L8, a ninth lens L9, and a tenth lens L10.
- the eighth lens L8 is a plano-convex lens having a convex surface directed toward the prism L5.
- the ninth lens L9 is a biconvex lens.
- the tenth lens L10 is a biconcave lens.
- the fourth lens group G4 is a lens group for focus adjustment, and includes an eleventh lens L11 disposed on the second optical axis A2.
- the eleventh lens L11 is a convex meniscus lens having a convex surface directed toward the prism L5.
- the fifth lens group G5 includes a twelfth lens L12 disposed on the second optical axis A2.
- the twelfth lens L12 is a biconvex lens.
- the IR filter F1 (see FIG. 6 or FIG. 8) is a filter that cuts invisible light in the infrared region incident on the CCD 37.
- an optical low-pass filter may be disposed in the second optical axis A2 direction (X-axis direction positive side) of the IR filter F1.
- the optical low-pass filter is a filter for removing a false color by removing a high spatial frequency component of the light beam incident on the CCD 37.
- the configuration of the lenses constituting each of the lens groups G1 to G5 is not limited to that described above, and other lens configurations can be employed as long as they have the same optical effects.
- FIG. 6 shows the arrangement of the lens groups G1 to G5 when the optical system 35 is located at the wide-angle end
- FIG. 8 shows each lens group G1 when the optical system 35 is located at the telephoto end. Shows the arrangement of ⁇ G5.
- the first lens group G1 is movable in the direction of the first optical axis A1, and when the optical system 35 is located at the wide-angle end, it is located at the closest position to the second lens group G2 in the movable range (see FIG. 6), when the optical system 35 is located at the telephoto end, it is located at the most distant position with respect to the second lens group G2 within the movable range (see FIG. 8).
- the second lens group G2 is stationary relative to the CCD 37 during the zooming of the optical system 35 from the wide-angle end to the telephoto end.
- the third lens group G3 can move in the second optical axis A2 direction together with the exposure adjusting member St.
- the optical system 35 is located at the remote position (see FIG. 6) and located at the telephoto end, it is located at the closest position to the second lens group G2 within the movable range (see FIG. 8).
- the fourth lens group G4 is movable in the second optical axis A2 direction.
- the fourth lens group G4 performs a focus adjustment operation and corrects a shift in the focus adjustment state caused by a change in the imaging magnification due to the movement of the first lens group G1 and the third lens group G3.
- the fifth lens group G5 and the IR filter F1 are relatively stationary with respect to the CCD 37 during zooming from the wide-angle end to the telephoto end of the optical system 35, as shown in FIGS.
- Each lens group G1 to G5 operates as described above.
- the first lens group G1 and the third lens group G3 move in conjunction with each other to change the imaging magnification in the CCD 37.
- FIG. 9 is an exploded perspective view of the imaging device 2 viewed from the same viewpoint as FIG. 4 (a).
- the lens barrel 31 includes a first group frame unit 41 that holds the first lens group G1, a base unit 43 to which the second group frame unit 42 that holds the second lens group G2 is fixed, an exposure adjustment member St, and a first lens group G1.
- the third group frame unit 44 that holds the third lens group G3, the fourth group frame unit 45 that holds the fourth lens group G4, and the master flange unit 46 that holds the fifth lens group G5 are also configured.
- the first group frame unit 41 includes a first lens group G1 disposed on the first optical axis A1, a first group frame 50 holding the first lens group G1, and the first group frame 50 as the first optical axis A1.
- Drive frame 51 movably supported in the direction (Y-axis direction), fixed frame 52 movably supporting the drive frame 51 in the first optical axis A1 direction (Y-axis direction), the fixed frame 52 and the base unit It is mainly composed of a drive gear 53 that is disposed so as to be rotatable along the Y-axis direction between the motor 43 and the drive gear 53 for transmitting the drive force of the motor unit 32 to the drive frame 51.
- the fixed frame 52 is fixed to the second group frame unit 42 that holds the second lens group G2. In this fixing, positioning in the Z-axis direction and the X-axis direction is performed so that the optical axis of the first lens group G1 and the optical axis of the fourth lens L4 of the second lens group G2 match.
- the base unit 43 includes a base 55 that forms the housing of the lens barrel 31, a cover 56 that forms the housing together with the base 55, covers the front side of the base 55, and a second group frame fixed to the base 55.
- the third group moving mechanism 57 moves the third group frame unit 44 housed in the housing composed of the unit 42, the base 55 and the cover 56 along the second optical axis A2 direction (X axis direction).
- the photo sensor 58 that detects the position of the third group frame unit 44 in the X-axis direction and the force are also mainly configured.
- a motor unit 32 that rotationally drives the drive gear 53 is attached to the negative side of the base unit 43 in the X-axis direction.
- the driving force of the motor unit 32 is transmitted to the third group moving mechanism 57 via the driving gear 53.
- a master flange unit 46 that covers the X axis direction positive side of the base unit 43 is fixed to the X axis direction positive side of the base unit 43.
- the third group frame unit 44 is provided on the second optical axis A2, and includes a shutter unit 60 including an exposure adjustment member St that performs a shutter operation and a diaphragm operation, a third lens group G3, and a third lens group G3. It is mainly composed of an image blur correction mechanism 61 that is held movably in the Y-axis direction and the Z-axis direction, and a third group frame 62 that supports the shutter unit 60 and the image blur correction mechanism 61.
- the third group frame 62 is fixed to the third group moving mechanism 57 of the base unit 43 and driven in the X-axis direction.
- the optical axis when the third lens group G3 is positioned at the movable center of the movable range and the optical axes of the sixth lens L6 and the seventh lens L7 of the second lens group G2 are aligned. Positioning in the Y-axis direction and Z-axis direction is performed.
- the third group frame 62 is slidably fitted to third group guide poles 70 and 71 extending from the master flange unit 46 described later to the X axis direction negative side. As a result, the third group frame unit 44 can move only in the X-axis direction, that is, in the second optical axis A2 direction.
- the fourth group frame unit 45 mainly includes a fourth lens group G4, a fourth group frame 66 that holds the fourth lens group G4, and a sensor magnet 67 and a coil 68 that are fixed to the fourth group frame 66. .
- the fourth group frame 66 is slidably fitted to fourth group guide poles 72, 73 extending from the master flange unit 46 described later to the X axis direction negative side.
- the fourth group frame 66 moves in the Y axis direction and the Z axis direction so that the optical axis of the fourth lens group G4 and the optical axes of the sixth lens L6 and the seventh lens L7 of the second lens group G2 are aligned. And is movable only in the X-axis direction, that is, in the second optical axis A2 direction.
- the master flange knit 46 includes a fifth lens group G5, a master flange 75 that holds the fifth lens group G5, a third group guide pole 70, 71 that is fixed to the master flange 75 and extends to the negative side in the X-axis direction.
- And MR sensor 77 that senses the magnetism of sensor magnet 67 and senses the position of fourth group frame boot 45 in the X direction.
- the master flange 75 is fixed to the positive side of the base 55 in the X-axis direction.
- the optical axis of the fifth lens group G5 and the sixth lens L6 and the seventh lens L7 of the second lens group G2 Positioned in the Y-axis direction and z-axis direction so that it matches the optical axis.
- the CCD unit 33 is fixed to the positive side of the master flange unit 46 in the X-axis direction.
- the detailed configuration of the first group frame unit 41 will be described with reference to FIG.
- FIG. 10 is an exploded perspective view of the first group frame unit 41.
- the first group frame unit 41 is a unit that supports the first lens group G1 with a multistage collapsible frame.
- the first group frame unit 41 includes a first lens group G1, a first group frame 50 holding the first lens group, and a first group DR (design ring) attached to the first group frame 50.
- a drive frame 51 that movably supports the first group frame 50
- a fixed frame 52 that movably supports the drive frame 51
- a drive from the motor unit 32 to the drive frame 51.
- a driving gear 53 to be connected.
- the first lens group G1 is fixed to the inner peripheral surface 101 of the first group frame 50 by adhesion or heat caulking. Further, on the inner peripheral surface 101 of the first group frame 50, the first group DR54 is mounted on the Y axis direction positive side of the first lens group G1. This prevents unwanted light from entering the first lens group G1. Further, by attaching the first group DR54, the adhesion mark (adhesion mark) of the first lens group G1 to the first group frame 50 is covered, and the appearance quality is ensured.
- the first group frame 50 has a cylindrical portion 102, a flange portion 103, cam pins 104a to 104c, extension portions 105a and 105b, and engagement rods 106a and 106b.
- the cylindrical portion 102 has an annular inner peripheral surface 101 to which the first lens group G1 is attached.
- the flange portion 103 is formed at the edge on the Y axis direction negative side of the tubular portion 102 and has an outer peripheral surface having a diameter larger than that of the tubular portion 102.
- the cam pins 104a to 104c are arranged in the circumferential direction at a plurality of circumferential positions on the outer peripheral surface of the flange portion 103 (for example, three positions: for example, at 3 o'clock, 7 o'clock and 11 o'clock as viewed from the Y axis direction positive side). They are provided at a predetermined angle (for example, 120 degrees) and project in the radial direction of the first optical axis A1.
- the extension parts 105a and 105b are centered on two circumferential points on the Y axis direction negative edge of the flange part 103 (for example, the 1 o'clock position and the 5 o'clock position when viewing the Y axis direction positive side force). Formed with a predetermined circumferential width (eg 30 degrees), It is an arc-shaped member that extends by force toward the Y axis direction negative side.
- the engaging portions 106a and 106b are formed so as to extend in the radial direction of the first optical axis A1 at the respective distal ends of the extension portions 105a and 105b.
- the tip portion 107a, 107b is formed with a circumferential width narrower than other portions.
- the horse ward motion frame 51 includes a cylindrical rod, cam pins l l la to l l lc, and a ring gear 112! /.
- the cam pins 111 & 111 are arranged at a plurality of locations in the circumferential direction of the outer surface 115 of the cylindrical portion 110 (for example, 3 locations: for example, 1 o'clock, 5 o'clock, 9 o'clock as viewed from the Y axis direction positive side). It is provided at a predetermined angle (for example, 120 degrees) in the circumferential direction, and protrudes in the radial direction of the first optical axis A1.
- the ring gear 112 has a tooth tip outside at a part of the circumferential edge of the negative portion of the cylindrical portion 110 in the Y-axis direction (for example, a position from 1 o'clock to 5 o'clock when viewed from the positive side in the Y-axis direction). It is formed integrally with the cylindrical portion 110 so as to protrude from the surface 115 in the radial direction of the first optical axis A1.
- the radius of the virtual circle connecting the tips of the cam pins 11 la to l 11c is formed larger than the radius of the virtual circle connecting the tips of the ring gear 112.
- the annular inner surface 116 of the cylindrical portion 110 and the ring gear 112 has a radius larger than the radius of the flange portion 103 of the first group frame 50, and is an imaginary connecting the leading ends of the cam pins 104a to 104c of the first group frame 50. It has a radius smaller than the radius of the circle. Therefore, the first group frame 50 can be arranged inside the drive frame 51 by cam-engaging the cam pins 104a to 104c with the cam grooves 118a to 118c formed on the inner side surface 116.
- annular flange portion 122 extending inward in the radial direction of the first optical axis A1 is formed on the edge portion on the positive side in the Y-axis direction of the cylindrical portion 110.
- the radius of the inner side surface of the flange portion 122 is formed to be approximately the same as the radius of the outer peripheral surface of the cylindrical portion 102 of the first group frame 50. This prevents unwanted light from entering the lens barrel 31 from the radial gap of the first optical axis A1 between the first group frame 50 and the drive frame 51.
- the cam grooves 118a to 118c are formed to be separated from each other by a predetermined angle (for example, 120 degrees) in the circumferential direction of the inner side surface 116.
- Each of the cam grooves 118a to 118c opens at three positions on the negative side in the Y-axis direction of the inner side surface 116 (for example, at 3 o'clock, 7 o'clock and 11 o'clock), and the cam pins 104a to 104c are connected to the cam grooves 118a to 118c.
- l Has an introduction end for introduction into 18c.
- each cam groove 118a to 118c are continuous with the introduction grooves 119a to 119c extending from the respective introduction ends to the Y axis direction positive side, and the introduction grooves 119a to l 19c, and are clockwise and Y axis direction positive sides when viewed from the Y axis direction positive side.
- Inclined grooves 120a to 120c extending toward the bottom.
- the introduction groove 119a of the cam groove 118a that forms the introduction end on the ring gear 112 side of the inner surface 116 is Y larger than the other introduction grooves 119b and 119c by the width of the ring gear 112 in the Y-axis direction.
- the axial length is long.
- the fixed frame 52 has a cylindrical portion 125 and extensions 126a and 126b.
- Cam grooves 128a to 128c and rectilinear grooves 129a and 129b are formed on the inner surface 127 of the cylindrical portion 125 and the extended portions 126a and 126b.
- a protrusion 140 protruding in the radial direction of the first optical axis A1 is formed at a predetermined position in the circumferential direction of the outer surface 130 of the cylindrical portion 125 (for example, a position at 2 o'clock when viewed from the Y axis direction positive side).
- the protrusion 140 pivotally supports the Y axis direction positive end of the drive shaft of the drive gear 53.
- a drive gear 53 is disposed in the through groove 141 along the Y-axis direction. The tooth tip of the drive gear 53 has entered the inside of the cylindrical portion 125 and meshes with the ring gear 112 of the drive frame 51 disposed inside the fixed frame 52.
- annular flange portion 142 extending inward in the radial direction of the first optical axis A1 is formed at the edge on the positive side in the Y-axis direction of the cylindrical portion 125.
- the radius of the inner surface of the flange portion 142 is formed to be approximately the same as the radius of the outer surface 115 of the cylindrical portion 110 of the drive frame 51. This prevents unnecessary light from entering the lens barrel 31 from the radial gap of the first optical axis A1 between the drive frame 51 and the fixed frame 52.
- a flange 145 that extends outward in the radial direction of the first optical axis A1 is formed at a part in the circumferential direction on the edge of the cylindrical portion 125 on the Y axis direction negative side.
- fixing portions 145a and 145b are formed on the flange 145.
- the fixing portion 145a is positioned on a fixing portion 164c of the second group frame unit 42 described later, and is fixed by a screw or the like.
- the fixing portion 145b is positioned on an arm portion formed integrally with the motor unit 32, and is fixed by a screw or the like.
- Extension parts 126a and 126b are provided at two locations in the circumferential direction on the negative side of the Y-axis direction of the cylindrical part 125.
- This is an arc-shaped member formed with a circumferential width of and extending toward the Y axis direction negative side. More specifically, the extension portions 126a and 126b have end portions on the X axis direction positive side at the 12 o'clock position and the 6 o'clock position when viewed from the Y axis direction positive side, respectively, and have a predetermined circumferential direction. It is formed with a width.
- the predetermined width means that the inner grooves 127 of the extension portions 126a and 126b are formed with introduction grooves 13la and 13lb of force grooves 128a and 128b, which will be described later, and straight grooves 129a and 129b, respectively. It is a sufficient width.
- a fixed portion 145c extending outward in the radial direction of the first optical axis A1 is formed at the end on the Y axis direction negative side of the extension portion 126a.
- the fixing portion 145c is positioned on a fixing portion 168b of the second group frame unit 42 described later, and is fixed by a screw or the like.
- a fixing portion 145d that extends outward in the radial direction of the first optical axis A1 is formed adjacent to the extension 126a at the intermediate portion in the circumferential direction between the extension 126a and the extension 126b.
- the fixing portion 145d is positioned with respect to the front surface of the motor unit 32 and is fixed by a screw or the like.
- a fixing portion 145e extending outward in the radial direction of the first optical axis A1 is formed adjacent to the extension portion 126b in the circumferential direction.
- the fixing portion 145e is positioned with respect to a fixing portion 165d of the second group frame unit 42 described later, and is fixed by a screw or the like.
- the annular inner surface 127 of the cylindrical portion 125 and the extension portions 126a and 126b has a radius larger than the radius of a virtual circle connecting the tips of the ring gears 112 of the drive frame 51, and the cam pins 11 la to l of the drive frame 51. It has a radius smaller than the radius of the imaginary circle connecting the tips of 1 lc. For this reason, the drive frame 51 can be disposed inside the drive frame 51 by cam-engaging the cam pins ll la to ll lc with cam grooves 128 a to 128 c formed on the inner surface 127. .
- the cam grooves 128a to 128c are formed to be separated from each other by a predetermined angle (for example, 120 degrees) in the circumferential direction of the inner surface 127.
- Each cam groove 128a to 128c opens at three positions on the negative side of the inner surface 127 in the Y-axis direction (for example, 1 o'clock, 5 o'clock, 9 o'clock), and the cam pins ll la to ll lc are used as force. It has an introduction end for introduction into the grooves 128a-128c.
- the cam grooves 128a to 128c are continuous with the introduction grooves 13la to 131c extending from the respective introduction ends to the Y axis direction positive side and the introduction grooves 131a to 131c, and are opposite to each other when viewed from the Y axis direction positive side.
- Inclined grooves 132a to 132c extending in the clockwise direction and the positive direction in the Y-axis direction are provided.
- the introduction grooves 131a and 131b are longer in the Y-axis direction than the other introduction grooves 131c by the length of the extension parts 126a and 126b in the Y-axis direction.
- the rectilinear grooves 129a and 129b engage with the tip portions 107a and 107b of the first group frame 50 to guide the movement of the first group frame 50 in the direction of the first optical axis A1 and to fix the first group frame 50 to the fixed frame 52. Relative rotation with respect to is impossible.
- the first group frame 50 has the cam pins 104a to 104c that are in the Y axis direction positive side of the introduction grooves 119a to 119c of the drive frame 51. It is arranged inside the drive frame 51 in a state where the cam is engaged with the end of the drive frame 51. Further, the drive frame 51 is arranged on the inner side of the fixed frame 52 in a state where each of the cam pins 111 & ⁇ 111 is cam-engaged with an end of the introduction groove 131 & ⁇ 131 ( :) on the positive side in the axial direction. In addition, the front cams 107a and 107b of the first group frame 50 are engaged with force cams in the vicinity of the Y axis direction negative side ends of the straight grooves 129a and 129b of the fixed frame 52! .
- each configuration of the first group frame unit 41 is substantially the same as the arrangement state (collapsed state) of the first group frame unit 41 when the imaging device 2 is not used.
- the drive frame 51 is configured so that most of the cylindrical portion 110 is in a state where each of the cam pins ll la to ll lc is cam-engaged with the end on the Y axis direction positive side of the inclined grooves 132a to 132c of the fixed frame 52. It extends from the cylindrical portion 125 of the fixed frame 52 to the Y axis direction positive side. That is, when the optical system 35 is located at the telephoto end, the first lens group G1 is a cylindrical cam configured between the first group frame 50 and the drive frame 51 as compared with the case where the optical system 35 is located at the wide angle end.
- the front end portions 107a and 107b of the first group frame 50 are positioned in the vicinity of the end portions on the Y axis direction positive side of the rectilinear grooves 129a and 129b. That is, the first lens group G1 is moved in the direction of the first optical axis A1 by approximately the length of the rectilinear grooves 129a and 129b in the Y-axis direction as compared with the case where the optical system 35 is located at the wide-angle end. .
- the configuration of the base unit 43 will be described with reference to FIG.
- FIG. 11 is an exploded perspective view of the base unit 43.
- the base unit 43 holds a second lens group G2 that bends the light beam incident along the first optical axis A1 in the direction along the second optical axis perpendicular to the first optical axis A1.
- the base unit 43 is a mechanism for moving the third lens group G3 (see FIGS. 5 to 8) that forms the zoom lens system together with the first lens group G1 in the direction of the second optical axis A2. Is provided.
- FIG. 11 among the configurations of the base unit 43 described with reference to FIG. 9, the second group frame unit 42, the base 55 that fixedly supports the second group frame unit 42 from the Y axis direction negative side, and the second group frame Three-group movement that is located in the middle of the base 42 and the base 42 and attached to the base 55 Mechanism 57 is illustrated.
- FIG. 12 is an exploded perspective view of the second group frame unit 42.
- FIG. 13 is a cross-sectional view of the second group frame unit 42 by a plane including the first optical axis A1 and the second optical axis A2.
- the second group frame unit 42 supports the second lens group G2, the second group frame 150 that holds the second lens group G2, the second group frame 150, and the support that is attached to the base 55. Part 151.
- the second group frame 150 includes a fourth lens holding frame 155 that holds the fourth lens L4, a prism holding frame 156 that holds the prism L5, a sixth lens holding frame 157 that holds the sixth lens L6, and a seventh lens.
- the seventh lens holding frame 158 that holds the lens L7 and the force are also mainly configured.
- the fourth lens holding frame 155 has a radius that substantially matches the radius of the fourth lens L4, and has an annular inner peripheral surface 155a extending in the Y-axis direction.
- the fourth lens L4 is disposed by being fitted to the inner peripheral surface 155a, and is fixed by adhesion or the like.
- a support surface 155b that is orthogonal to the Y axis and supports the fourth lens L4 by force toward the Y axis direction positive side (Fig. 13). Reference) is formed.
- the fourth lens L4 is disposed so that the negative surface in the Y-axis direction is in contact with the support surface 155b, and is positioned in the Y-axis direction (the first optical axis A1 direction).
- the prism holding frame 156 is a frame that houses the prism L5 therein and opens in the first optical axis A1 direction and the second optical axis A2 direction.
- the Y axis direction negative side of the fourth lens holding frame 155 Are integrally formed.
- the prism holding frame 156 has an inclined surface 156a (see FIG. 13) that is disposed to face the reflecting surface L5a (see FIG. 13) of the prism L5 and tilts 45 degrees downward toward the positive side in the X axis direction.
- a prism L5 is accommodated in a space formed by the inclined surface 156a and the opposing surfaces 156b and 156c, and is fixed by bonding or the like.
- the sixth lens holding frame 157 is formed integrally with the prism holding frame 156 on the X axis direction positive side of the prism holding frame 156.
- the sixth lens holding frame 157 has a radius that substantially matches the radius of the sixth lens L6, and has an annular inner peripheral surface 157a extending in the X-axis direction.
- the sixth lens L6 is disposed by being fitted to the inner peripheral surface 157a, and is fixed by adhesion or the like.
- the exit surface L5d of the prism L5 is positioned on the negative side of the inner peripheral surface 157a in the X-axis direction (see FIG. 13).
- the sixth lens L6 has a negative surface in the X-axis direction on the output surface L5d. It is arranged so that it abuts and is positioned in the X-axis direction (second optical axis A2 direction).
- the seventh lens holding frame 158 is formed integrally with the sixth lens holding frame 157 on the X axis direction positive side of the sixth lens holding frame 157.
- the seventh lens holding frame 158 includes a slope 158a that forms part of each side surface of the virtual equilateral triangular prism with the seventh lens L7 as an inscribed circle, and each slope is smooth around the second optical axis A2. And an arcuate surface 158b connected to the.
- the seventh lens L7 is disposed with its outer peripheral surface in contact with each inclined surface 158a, and is fixed by adhesion.
- the X-axis direction positive surface of the sixth lens L6 is located (see FIG.
- the seventh lens L7 is positioned on the X-axis direction negative side.
- the surface is arranged so as to contact the positive surface of the sixth lens L6 on the X axis direction, and is positioned in the X axis direction (second optical axis A2 direction).
- An opening member 159 that is a plate-like member having an opening at the center is fixed to the end surface of the seventh lens holding frame 158 on the positive side in the X-axis direction with a screw or the like.
- the opening member 159 is a member for blocking unnecessary light in the unnecessary direction out of the light emitted from the second group frame unit 42 along the second optical axis A2.
- the opening member 159 has a circular opening substantially at the center, and is attached to the seventh lens holding frame 158 so that the center of the opening coincides with the second optical axis A2 (see FIG. 13). ). Furthermore, the opening member 159 supports the seventh lens L7 on the X axis direction negative side at the opening edge of the opening.
- the support portion 151 is formed from an intermediate position in the X-axis direction of the second group frame 150 toward the positive side in the Z-axis direction, and has a first member 163 having a surface facing the positive side in the X-axis direction, and a tip portion of the first member 163 smell
- a second member 164 extending on the X axis direction positive side
- a third member 165 formed on the Z axis direction negative side of the second group frame 150 and having a surface facing the X axis direction positive side
- the X axis direction negative side It is mainly formed from fixed portions 168a and 168b formed at the end portions of the two.
- the first member 163 has a hole 163a for fitting and fixing the fourth group guide pole 73 (see FIG. 9) on the surface facing the X axis direction positive side.
- the second member 164 has a hole 164a for fitting and fixing the third group guide pole 71 (see FIG. 9) at substantially the same Y-axis direction position as the hole 163a on the surface facing the positive side in the X-axis direction.
- the second member 164 forms a fixing portion 164b for fixing the second group frame unit 42 to the base 55 at the end on the positive side in the Z-axis direction, and the first group frame unit 41 is connected to the second group frame unit.
- -A fixing part 164c for fixing to the base 42 is formed.
- the fixing portion 164b is positioned with respect to the fixing portion 171a formed on the base 55, and is fixed by a screw or the like.
- the fixing portion 164c is positioned with respect to the fixing portion 145a formed on the fixing frame 52 of the first group frame unit 41, and is fixed by a screw or the like.
- the first member 163 is formed from the intermediate position of the second group frame 150 in the X-axis direction toward the Z-axis direction positive side, and the second member is the X-axis at the tip of the first member 163. It is formed toward the positive side. Therefore, the second group frame 150 is more negative in the X-axis direction than the end surface on the positive X-axis direction of the second group frame 150 between the second Z-axis direction positive surface of the second group frame 150 and the second member Z-axis direction negative side surface. On the side, a recessed space 166 is secured. A diaphragm actuator 202 that protrudes to the negative side in the X-axis direction of a shutter nut 60, which will be described later, can enter this recessed space 166. This will be described later with reference to FIGS.
- the third member 165 is formed so that the force in the vicinity of the end on the Y axis direction negative side of the second group frame 150 is also directed toward the Z axis direction negative side, and on the surface facing the X axis direction positive side, the Z axis direction positive side In this order, a hole 165a (see FIG. 11) for fitting and fixing the fourth group guide pole 72 and a hole 165b for fitting and fixing the third group guide pole 70 are provided. Further, the third member 165 forms a fixing portion 165c for fixing the second group frame unit 42 to the base 55 at the end on the negative side in the Z-axis direction, and the first group frame unit 41 is changed to the second group frame unit 42. A fixing portion 165d for fixing to is formed.
- the fixing portion 165c is positioned with respect to the fixing portion 171b formed on the base 55, and is fixed by a screw or the like.
- the fixed part 165d is formed on the fixed frame 52 of the first group frame unit 41. It is positioned with respect to the fixed part 145e formed and fixed by a screw or the like.
- the third member 165 is formed such that the force in the vicinity of the end on the Y axis direction negative side of the second group frame 150 is also directed toward the Z axis direction negative side. Therefore, a recessed space 167 adjacent to the Z-axis direction negative side of the second group frame 150 is secured on the positive side of the third member 165 in the Y-axis direction.
- a shutter actuator 203 that protrudes to the negative side in the X-axis direction of a shutter unit 60, which will be described later, can enter the recessed space 167. This will be described later with reference to FIGS.
- the fixing portion 168a is positioned and fixed with respect to the fixing portion provided on the back side of the motor unit 32.
- the fixing portion 168b is positioned with respect to the fixing portion 171c formed on the base 55, is fixed by a screw or the like, and fixes the fixing portion 145c of the fixing frame 52.
- the configuration of the base 55 will be described with reference to FIG.
- the base 55 is mainly composed of a back surface 170 constituting the back surface of the lens barrel 31, and a side surface 171 extending from the back surface 170 to the Y axis direction positive side.
- the bearing portion 172 is a cylindrical convex portion protruding to the Y axis direction positive side, and is inserted into a center hole 180a provided at the rotation center of the ring gear 180, and a guide pin that rotatably supports the ring gear 180.
- 173a and 173b are members projecting to the Y axis direction positive side formed so as to have predetermined intervals in the X axis direction and the Z axis direction, respectively, and are formed along the longitudinal direction of the rod unit 182. Inserted into the guide grooves 183a and 183b, respectively, to guide the movement of the rod unit 182 in the X-axis direction.
- the restricting portion 174 is a bottomed longitudinal groove extending in the X-axis direction.
- the end portion 174a, 174b of the groove bottom force of the control portion 174 rising on the Y axis direction positive side is formed, and the drive shaft bearing portion 175 is the Y axis direction negative side of the drive shaft of the drive gear 53 of the first group frame unit 41. The end of is supported.
- Fixing portions 171 a to 171 c for fixing the second group frame unit 42 to the base 55 are formed on the side surface 171.
- the fixing portions 171a, 171b, 171c are positioned with respect to the fixing portions 164b, 165c, 168b of the second group frame unit 42, respectively, and are fixed by screws or the like.
- the configuration of the third group moving mechanism 57 will be described with reference to FIG.
- the third group moving mechanism 57 is driven by the drive from the motor unit 32 (see FIG. 9), and is a mechanism for moving the third group frame unit 44 in the direction along the second optical axis A2.
- the third group moving mechanism 57 includes a ring gear 180 for converting the rotational drive transmitted from the motor unit 32 through the drive gear 53 into a drive in the direction along the second optical axis A2, and a third group frame.
- the ring gear 180 is a plate-like member having teeth formed in an arc shape on the outer periphery so as to mesh with the drive gear 53, and rotates in a predetermined rotation angle range.
- the ring gear 180 has a center hole 180 a at the center of rotation, and is attached to the base 55 by fitting the center hole 180 a to the bearing portion 172 of the base 55.
- the ring gear pin 181 is a columnar member having a predetermined length in the Y-axis direction, and the end on the negative side in the Y-axis direction is fixed to the ring gear 180 by caulking or the like.
- the rod unit 182 is functionally connected to the ring gear 180 by engaging with the ring gear pin 181, and constitutes a slider crank mechanism together with the ring gear 180.
- FIG. 14 is an exploded perspective view of the rod unit 182.
- the rod unit 182 includes a rod 183, a crimping node 186 fixed to the rod 183, a panel pin 187 for fixing the crimping panel 186 to the rod 183, and a crimping panel 1 It is mainly composed of a crimp panel control pin 185 that regulates 86 crimping operations.
- An elastic coupling mechanism that elastically couples the ring gear 180 and the rod unit 182 is constituted by the crimping panel 186, the panel pin 187, and the crimping panel regulation pin 185.
- the rod 183 is a plate-like member that is long in the X-axis direction.
- the rod 183 has two guide grooves 183a and 183b extending in the longitudinal direction, a through-hole 183c formed on the X axis direction positive side of the guide groove 183b, and on the X axis direction negative side of the guide grooves 183a and 183b.
- An engagement hole 183d is formed.
- guide pins 173a and 173b formed on the base 55 are inserted into the guide grooves 183a and 183b, respectively.
- the guide groove 183a and the guide groove 183b are formed apart from each other in the Z-axis direction by the same distance as the Z-axis direction distance between the guide pin 173a and the guide pin 173b. As a result, the movement of the rod 183 is restricted only to the translational movement in the X-axis direction.
- a projection 65 of a third group frame unit 44, which will be described later, is also inserted into the through-hole 183c in the Y axis direction positive side.
- the protrusion 65 is inserted until its tip protrudes to the Y axis direction negative side of the rod 183.
- the ring gear pin 181 is also inserted with a negative Y-axis direction force.
- the engagement hole 183d extends in the Z-axis direction and is continuous with the first engagement hole 183e having an X-axis direction width larger than the diameter of the ring gear pin 181 and the first engagement hole 183e on the positive side in the Z-axis direction.
- the second engagement hole 183f that is wider in the X-axis direction than the first engagement hole 183e formed in this manner.
- the crimping screw 186 is a coiled spring 186a and a torsion coil spring composed of two arms 186b and 186c extending from the force of the coining 186a.
- the pressure-bonding panel 186 is formed so that each arm 186b, 186c can support a load in the direction of the mutual force when elastically deformed so as to wind the coil 186a.
- the panel pin 187 is a member that is passed through the coil 186 a of the crimping panel 186, and one end of which is fitted into a hole formed in the rod 183 and fixed.
- the panel pin 186 is fixed to the rod 183.
- the panel pin 187 is disposed on the negative side in the Z-axis direction of the first engagement hole 183e.
- the crimping panel regulating pin 185 is a member for maintaining the crimping panel 186 in a predetermined elastic deformation state, and is disposed between the arm part 186b and the arm part 186c, and each arm part 186b, 186c. The force is also received by the other arm 186c, 186b in the direction of pressure.
- the crimp panel control pin 185 is disposed on the negative side in the Z-axis direction of the first engagement hole 183e. Further, the X-axis direction width of the contact surface of the crimp panel control pin 185 with the crimp panel 186 is wider than the X-axis direction width of the first engagement hole 183e.
- FIG. 15 is a perspective view mainly showing an assembled state of the rod unit 182.
- the crimping panel 186 is fixed to the mouth 183 by a pin 187.
- the crimping panel 186 is elastically deformed, and is fixed with a crimping panel regulating pin 185 interposed between the arm portions 186b and 186c.
- the arm portion 186b located on the positive side in the X-axis direction contacts the surface on the positive side in the X-axis direction of the crimp panel control pin 185 and faces the negative side in the X-axis with respect to the crimp panel control pin 185.
- a pressing force in the direction of force is applied.
- the arm portion 186c located on the negative side in the X-axis direction abuts on the surface on the negative side in the X-axis direction of the crimp panel control pin 185, and the crimping force in the direction toward the positive side of the X-axis with respect to the crimp panel control pin 185 To act.
- a ring gear pin 181 fixed to the ring gear 180 (see FIG. 11) is provided in the Y-axis direction in the middle of the arm part 186b and arm part 186c of the crimping panel 186. Negative force is also inserted.
- the rod 183 is driven in the X-axis direction while sliding the hole edge of the engagement hole 183d on the outer periphery of the ring gear pin 181.
- Guide pins 173a and 173b formed on the base 55 are respectively inserted into the guide grooves 183a and 183b extending in the X-axis direction of the rod 183 from the Y-axis direction negative side force. As a result, the driven rod 183 translates in the X-axis direction.
- the through hole 183c of the rod 183 is positioned so as to face the positive side in the Y-axis direction of the restricting portion 174 formed in the base 55.
- a protrusion 65 of a third group frame unit 44 described later is inserted into the through-hole 183c also in the Y-axis direction positive side force.
- the tip of the protrusion 65 protrudes to the negative side of the rod 183 in the Y-axis direction, and further enters the restricting portion 174.
- FIG. 16 shows the engagement state of the protrusion 65, the rod 183, and the restricting portion 174 of the third group frame unit 44.
- the projection is formed on the Y axis direction negative side formed on the third group frame 62 of the third group frame unit 44.
- the projecting portion 65 to be inserted is inserted into a through hole 183 c formed in the rod 183, and the tip thereof enters the restricting portion 174 of the base 55.
- the rod 183 can move to the position where the protrusion 65 contacts the end 174a on the positive side in the X-axis direction, and the protrusion 65 contacts the end 174b on the negative side in the X-axis direction. It can be moved to the touching position (see Fig. 11 or Fig. 15).
- FIG. 17 shows a state where the ring gear pin 181 is inserted into the engagement hole 183d.
- the X-axis direction width W1 of the first engagement hole 183e of the engagement hole 183d is larger than the diameter d of the ring gear pin 181. Further, the X-axis direction width W2 of the contact surface of the crimp panel control pin 185 with the crimp panel 186 is larger than the X-axis direction width W1 of the first engagement hole 183e. Therefore, in a state where the ring gear pin 181 force is inserted into the first engagement hole 183e, the arm portions 186b and 186c of the crimping panel 186 abut against the abutting surfaces at both ends in the X-axis direction of the crimping panel regulating pin 185. Therefore, when the ring gear pin 181 is positioned in the first engagement hole 183e, the crimping force of the crimp panel 186 does not act on the ring gear pin 181! /.
- the X axis direction positive side arm 186b is moved to the X axis direction positive side by the ring gear pin 181. Due to the elastic deformation, the arm portion 186b is separated from the contact surface force on the positive side in the X-axis direction of the crimp panel control pin 185. For this reason, the pressure-bonding force of the pressure-bonding panel 186 acts on the X-axis direction negative side contact surface of the pressure-bonding panel regulating pin 185 from the X-axis direction negative side arm 186c. As a result, the rod 183 Through the screw restricting pin 185, a pressing force in the direction of the direction of force is received on the positive side in the X axis direction.
- the ring gear pin 181 when the ring gear pin 181 is positioned on the X axis direction negative side of the second engagement hole 183f, the X axis direction negative side arm portion 186c is elastically deformed by the ring gear pin 181 to the X axis direction negative side, The arm portion 186c is also separated from the contact surface force on the negative side in the X-axis direction of the crimp panel control pin 185. For this reason, the crimping force of the crimping panel 186 acts on the X axis direction positive contact surface of the crimp panel control pin 185 from the X axis direction positive side arm 186b. As a result, the rod 183 receives a pressing force in the direction of the force on the negative side in the X-axis direction via the pressure-bonding panel restricting pin 185.
- FIG. 18 shows the rotation angle of the ring gear 180 when the optical system 35 is located at the wide-angle end, and the operation of the elastic coupling mechanism and the operation of the rod 183 in accordance therewith.
- FIGS. 19 to 21 show the rotation angle of the ring gear 180 and the operation of the elastic coupling mechanism and the operation of the rod 183 when the optical system 35 moves to the telephoto end also at the wide-angle end force.
- Fig. 20 shows the rotation angle of the ring gear 180 when the optical system 35 is located at the normal position, which is an intermediate position between the wide-angle end and the telephoto end, the operation of the elastic coupling mechanism and the operation of the rod 183. Is shown.
- FIG. 22 shows the rotation angle of the ring gear 180 when the optical system is located at the telephoto end, and the operation of the elastic coupling mechanism and the operation of the rod 183 in accordance therewith.
- the ring gear 180 is positioned at the end in the clockwise direction as viewed in the positive Y-axis direction force.
- the ring gear pin 181 fixed to the ring gear 180 is positioned at the positive end of the movable range in the X-axis direction, and the X-axis direction positive side of the second engagement hole 183f of the rod 183 Is engaged.
- the crimping panel 186 presses the rod 183 to the X axis direction positive side. Yes.
- the protrusion 65 of the third group frame unit 44 that is inserted into the rod 183 and engages with the restriction portion 174 of the base 55 is in contact with the end 174a on the positive side in the X-axis direction of the restriction portion 174. Movement to the positive side is restricted. Therefore, when the optical system 35 is located at the wide-angle end, the rod 183 is restricted from moving to the X axis direction positive side and is firmly fixed by being pressed to the X axis direction positive side. Has been.
- the state in which the optical system 35 is positioned at the wide-angle end is a malfunction of the imaging device 2. It is in the same state as the arrangement state (collapsed state) of the optical system 35 in use. For this reason, the rod 183 can be securely fixed when the imaging device 2 is not used.
- the ring gear 180 is rotationally driven in the counterclockwise direction with the end force in the clockwise direction as viewed from the positive side force in the Y-axis direction.
- FIG. 19 shows a case where the ring gear 180 is located near the end in the clockwise direction when viewed from the Y axis direction positive side.
- FIG. 20 shows a case where the ring gear 180 is located at an intermediate position in the movable range.
- FIG. 21 shows a case where the ring gear 180 is positioned near the end in the counterclockwise direction with reference to the Y axis direction positive side force.
- the ring gear pin 181 fixed to the ring gear 180 is moved to the X axis direction negative side while being engaged with the first engagement hole 183e of the rod 183.
- the crimping force of the crimp panel 186 does not act on the ring gear pin 181.
- the ring gear 180 rotates counterclockwise while engaging the ring gear pin 181 with the first engagement hole 183e of the mouth 183, thereby causing the rod 183 to move to the negative side in the X-axis direction. Drive with force.
- the rod 183 Since the rod 183 is driven while the guide grooves 183a and 183b are engaged with the guide pins 173a and 173b formed on the base 55, the rod 183 translates in a direction toward the negative side in the X-axis direction. A protrusion 65 of the third group frame unit 44 is fitted to the rod 183. For this reason, the third group frame unit 44 moves in the X-axis direction negative side as the rod 183 moves.
- the ring gear 180 is positioned at the end in the counterclockwise direction with reference to the positive force in the Y-axis direction.
- the ring gear pin 181 fixed to the ring gear 180 is located at the negative end of the movable range in the X-axis direction, and the X-axis direction negative side of the second engagement hole 183f of the rod 183 Is engaged.
- the crimping panel 186 presses the rod 183 to the X axis direction negative side. .
- the protrusion 65 of the third group frame unit 44 that is inserted into the rod 183 and engages the restriction portion 174 of the base 55 is in contact with the end portion 174b on the negative side in the X axis direction of the restriction portion 174. Movement to the negative side is restricted. Therefore, when the optical system 35 is located at the telephoto end, the movement of the rod 183 to the negative side in the X axis direction is restricted and the rod 183 is securely fixed by being pressed to the negative side in the X axis direction. Has been.
- FIG. 23 is an exploded perspective view of the third group frame unit 44.
- the third group frame unit 44 includes a shutter unit 60 that is provided on the second optical axis A2 and includes an exposure adjustment member St that performs a shutter operation and a diaphragm operation, a third lens group G3, and a third lens group G3. It is mainly configured by an image shake correction mechanism 61 that is held movably in the Y-axis direction and the Z-axis direction, and a third group frame 62 that supports the shutter unit 60 and the image shake correction mechanism 61.
- the shutter unit 60 is provided on the second optical axis A2 and includes an exposure adjustment member St that is an aperture and a shutter for controlling the exposure amount and exposure time of the CCD 37 (see FIG. 9).
- a diaphragm actuator 202 that protrudes toward the negative side in the X-axis direction on the positive side in the Z-axis direction of 201, and a protrusion that protrudes toward the negative side in the X-axis direction on the negative side in the Z-axis direction of the main body 201.
- the shutter actuator 203 is composed mainly of the following.
- the aperture activator 202 and the shutter activator 203 are spaced apart in the Z-axis direction with the second optical axis A2 in between.
- the shutter unit 60 is fixed to the third group frame 62 with an image blur correction mechanism 61 described later interposed therebetween.
- the image blur correction mechanism 61 holds the third lens group G3, and a pitching moving frame 205 that can move in the Z-axis direction (pitching direction) and the Y-axis direction (showing direction) with respect to the third group frame 62, and the pitching
- the electric board 206 attached to the X axis direction positive side of the moving frame 205, the cap 207 attached to the pitching moving frame 205 from the X axis direction positive side of the electric board 206, and the pitching moving frame 205 moved in the Z axis direction.
- It is configured mainly with a winging moving frame 208 that can be held in the Y-axis direction with respect to the third group frame 62 and is movable.
- the pitching moving frame 205 is formed with a cylindrical portion 205c that holds the third lens group G3 at the center, and has a bearing 205a on the Y axis direction positive side and a detent 205b on the Y axis direction negative side.
- a pitching shaft 205c parallel to the Z-axis direction is inserted into the bearing 205a. Both ends of the pitching shaft 205c are supported by fixed portions 208a of a winging moving frame 208 described later.
- the detent 205b engages with an engaging portion 208b of a wing moving frame 208, which will be described later, so as to be movable in the Z-axis direction.
- the electric board 206 includes a coil 206a for driving the third lens group G3 in the Y-axis direction, a coil 206b for driving in the Z-axis direction, and a hall element 206c for detecting the Y-axis direction position of the third lens group G3. And a hall element 206d for detecting the position in the Z-axis direction.
- the coils 206a and 206b are integrally formed on the electric substrate 206 as a laminated coil, for example.
- the FPC 206e is attached to the electric board 206 and transmits signals between the coinboards 206a and 206b, the Honore elements 206c and 206c, and the main board 23 (see FIG. 3).
- the cap 207 is attached to the X axis direction positive side of the third lens group G3, and suppresses the occurrence of flare, ghost, and the like.
- the cap 207 is attached so as to cover the cylindrical portion 205c of the pitching moving frame 205 with the electric board 206 interposed therebetween.
- the caming moving frame 208 is a member having a cylindrical portion 205c that holds the third lens group G3 at the center and an opening into which the cap 207 is inserted. Both ends of the pitching shaft 205c are connected to the Y axis direction positive side. On the negative side in the Y-axis direction of the supporting fixed portion 208a to be supported, an engaging portion 208b that engages with the detent 205b of the pitching moving frame 205 is formed. Accordingly, the coining moving frame 208 supports the pitching moving frame 205 so as to be slidable in the Z-axis direction.
- a bearing 208c is formed on the positive side in the Z-axis direction
- a rotation stop 208d is formed on the negative side in the Z-axis direction.
- the bearing shaft 208e parallel to the Y-axis direction is inserted into the bearing 208c. Both ends of the shafting shaft 208e are supported by fixing portions 62a of the third group frame 62 described later.
- the rotation stopper 208d engages with an engaging portion 62b of the third group frame 62 described later so as to be movable in the Y-axis direction.
- the winging moving frame 208 can slide in the direction along the winging shaft 208e with respect to the third group frame 62.
- the third group frame 62 is a member arranged on the positive side in the X-axis direction with respect to the caming movement frame 208.
- the third group frame 62 On the surface on the negative side in the X-axis direction, the third group frame 62 is formed on the positive side in the Z-axis direction.
- a fixing portion 62a that supports both ends is formed on the negative side in the Z-axis direction with an engaging portion 62b that engages with a detent 208d of the wing moving frame 208.
- the third group frame 62 supports the wing moving frame 208 so as to be movable in the Y-axis direction.
- a yoke 62d is press-fitted and fixed to the fitting portion 62g on the negative side in the Z-axis direction of the third group frame 62.
- the yoke 62d is a member with a U-shaped cross section perpendicular to the Y-axis, with two poles in the Z-axis direction on the inside. Fix the magnetized magnet 62c.
- the yoke 62d is fixed so that the coil 206a of the electric board 206 and the magnet 62c face each other in the X-axis direction.
- an electromagnetic actuator in the pitching direction is configured.
- a yoke 62f is press-fitted and fixed to the fitting portion 62h on the Y axis direction negative side of the third group frame 62.
- the yoke 62f is a member having a U-shaped cross section perpendicular to the Z-axis, and a magnet 62e magnetized in two poles in the Y-axis direction is fixed inside.
- the yoke 62f is fixed so that the coil 206b of the electric board 206 and the magnet 62e face each other in the X-axis direction. Thereby, an electromagnetic actuator in the winging direction is configured.
- the image blur correction mechanism 61 can drive the third lens group G3 in two directions (Y-axis direction and Z-axis direction) orthogonal to the second optical axis A2 to perform image blur correction. It becomes possible.
- a protruding portion 65 that protrudes to the Y axis direction negative side is formed on the Y axis direction negative side.
- the protrusion 65 engages with the through hole 183c of the rod 183 (see FIG. 14).
- the third group frame 62 is driven from the rod unit 182 in the X-axis direction.
- the third group frame 62 includes a bearing portion 62i and a bearing portion at the corners on the Y axis direction positive side and the Z axis direction positive side and the Y axis direction negative side and the Z axis direction negative side, respectively. 63 ⁇ 4 is formed.
- a third group guide pole 71 extending from the master flange unit 46 (see FIG. 9) along the X-axis direction is inserted into the bearing 62i.
- a third group guide pole 70 extending along the X-axis direction from the master flange unit 46 (see FIG. 9) is inserted into the bearing portion 62j.
- the third group frame 62 is movable in the X-axis direction along the third group guide poles 70 and 71.
- the image blur correction mechanism 61 is fixed to the third group frame 62 and the shutter unit 60 is attached from the negative side in the X-axis direction.
- the third group frame unit 44 is integrally driven in the X-axis direction from the rod unit 182 and is guided in the X-axis direction by the third group guide poles 70 and 71. Move in the direction along the optical axis A2. [4.5: 4 group frame unit]
- FIG. 24 is an exploded perspective view of the fourth group frame unit 45.
- 4 group frame unit 45 is the 4th lens group
- the fourth group frame unit 45 mainly includes a fourth lens group G4, a fourth group frame 66 that holds the fourth lens group G4, and a sensor magnet 67 and a coil 68 that are fixed to the fourth group frame 66. .
- the fourth group frame 66 has an opening 66a for holding the fourth lens group G4.
- the fourth lens group G4 is fixed to the opening 66a by adhesion or caulking.
- the fourth group frame 66 includes a bearing portion 66b, a bearing portion 66c, and a corner portion on the Y axis direction positive side and the Z axis direction positive side, and a corner portion on the Y axis direction negative side and the Z axis direction negative side, respectively. Is formed.
- the bearing portion 66b is a cylindrical bearing that is long in the X-axis direction, and a fourth group guide pole 73 extending from the master flange unit 46 (see FIG. 9) along the X-axis direction is inserted.
- a fourth group guide pole 72 extending from the master flange unit 46 (see FIG. 9) along the X-axis direction is inserted into the bearing portion 66c.
- the fourth group frame 66 can move in the X-axis direction along the fourth group guide poles 73 and 72.
- a sensor magnet 67 is fixed to the fourth group frame 66 so that its longitudinal direction is along the cylindrical bearing portion 66b.
- the sensor magnet 67 is multipolarly magnetized in the X-axis direction.
- Sensor One magnet 67 is arranged opposite to MR sensor 77 (see FIG. 9) of master flange unit 46 in the Y-axis direction.
- a coil 68 is bonded and fixed to the positive side of the fourth group frame 66 in the X-axis direction.
- An FPC 68a is connected to the coil 68.
- the FPC 68a electrically connects the coil 68 and the main board 23 (see FIG. 3).
- the coil 68 is penetrated by a part of a U-shaped main yoke 76a in a cross section perpendicular to the Z-axis fixed to a master flange unit 46 described later.
- a magnet 76b is fixed to the other part of the main yoke 76a.
- the open end on the negative side in the X-axis direction of the main yoke 76a is closed by the side yoke 76c while passing through the coil 68.
- the magnetic member 76 composed of the main yoke 76a, the magnet 76b and the side yoke 76c, and the coil 68 constitute a voice coil type linear motor.
- a driving force in the X-axis direction is generated in the coil 68, and the fourth group frame unit 45 that fixes the coil 68 and the coil 68 is driven in the X-axis direction.
- the fourth group frame unit 45 is driven in the X-axis direction by the voice coil type linear motor, and is guided in the X-axis direction by the fourth group guide poles 73 and 72. Move in the direction along the optical axis A2.
- the fourth group frame unit 45 may be driven using another motor, for example, a stepping motor.
- FIG. 25 is an exploded perspective view of the master flange unit 46.
- the master flange 46 is a member that, together with the base unit 43, constitutes the housing of the lens barrel 31, and is fixed in the X-axis direction of the base 55 by screws or the like.
- a magnetic member 76 constituting a magnetic circuit is fixed to the master flange unit 46 together with the coil 68 of the fourth group frame unit 45. Specifically, the magnetic member 76 is fixed by press-fitting and fixing a press-fitting protrusion 76d of the main yoke 76a constituting the magnetic member 76 into a fitting portion (not shown) of the master flange unit 46.
- a magnet 76b is fixed to the inner surface of the main yoke 76a on the Y axis direction negative side by bonding or the like.
- the coil 68 of the fourth group frame unit 45 is passed through the main yoke 76a, and the side yoke 76c is connected to the open end of the main yoke 76a on the negative side in the X-axis direction when the coil 68 is passed therethrough. It is fixed.
- an MR sensor 77 On the positive side of the master flange unit 46 in the Y-axis direction, an MR sensor 77 (see Fig. 9) A fitting portion 75f for attachment is formed. A part of the fitting portion 75f has a through portion 75g penetrating the inside of the master flange unit 46.
- the MR sensor 77 is fixed to the fitting portion 75f, and through the through portion 75g, the sensor magnet 67 (see Fig. 24) of the 4-group frame unit 45 located inside the master flange unit 46 and the Y axis Opposite the direction.
- An MRPC (not shown) is connected to the MR sensor 77, and is electrically connected to the main board 23 (see FIG. 3) via the FPC.
- cylindrical guide pole support portions 75b and 75c adjacent to the Z axis direction are formed.
- the guide pole support portion 75b located on the positive side in the Z-axis direction supports the end portion on the positive side in the X-axis direction of the third group guide pole 71.
- the guide pole support portion 75c located on the negative side in the Z-axis direction supports the end portion on the positive side in the X-axis direction of the fourth group guide pole 73.
- cylindrical guide pole support portions 75d and 75e adjacent to the Z-axis direction are formed at the corners of the master flange unit 46 on the Y-axis direction negative side and the Z-axis direction negative side.
- the guide pole support portion 75d located on the positive side in the Z-axis direction supports the end portion on the positive side in the X-axis direction of the fourth group guide pole 72.
- the guide pole support portion 75e located on the negative side in the Z-axis direction supports the end portion on the positive side in the X-axis direction of the third group guide pole 70.
- the end on the negative side in the X-axis direction of each guide pole 70 to 73 is fixed to the second group frame unit 42.
- FIG. 26 is a cross-sectional view of the lens barrel 31 on a plane including the first optical axis A1 and the second optical axis A2.
- members that are not located on a plane including the first optical axis A1 and the second optical axis A2 are also shown.
- a configuration necessary for the explanation is mainly shown.
- Fig. 26 (a) shows the case where the optical system 35 is located on the wide-angle side
- Fig. 26 (b) shows the case where the optical system 35 is located at the normal position which is an intermediate position between the wide-angle end and the telephoto end.
- c) shows the case where the optical system 35 is located at the telephoto end!
- Drive gear 53 is 1
- the drive frame 51 of the group frame unit 41 and the ring gear 180 of the base unit 43 are engaged with each other, and the rotational drive of the drive gear 53 causes the drive frame 51 and the ring gear 180 to rotate.
- the first group frame unit 41 configured as described above operates, and the first lens group G1 held thereby moves to the Y axis direction positive side.
- the drive is converted into a translational motion of the rod unit 182 in the X axis direction negative side.
- the protrusion 65 of the third group frame unit 44 is engaged with the rod unit 182. Therefore, together with the rod unit 182, the third group frame unit 44 translates in the negative direction in the X-axis direction.
- the third group frame unit 44 has a part of the first group frame unit 41 on the positive side in the X-axis direction and Y Arranged to face each other in the axial direction. Specifically, a part of the third group frame unit 44 is arranged so as to face a part on the X axis direction positive side of the fixed frame 52 in the Y axis direction.
- the third group frame unit 44 is closer to the second group frame unit 42 in the movable range in the X-axis direction. Move to touching position.
- FIG. 27 is a perspective view showing the positional relationship between the second group frame unit 4 2 and the shutter unit 60 of the third group frame unit 44 when the optical system 35 is located at the wide-angle end.
- FIG. 28 is a perspective view showing the positional relationship between the second group frame unit 42 and the shutter unit 60 of the third group frame unit 44 when the optical system is located at the telephoto end.
- FIG. 29 is a plan view showing the positional relationship between the second group frame unit 42 and the shutter unit 60 of the third group frame unit 44 when the optical system is positioned at the telephoto end, as viewed from the Y axis direction positive side.
- the second group frame unit 42 is formed with a recessed space 166 and a recessed space 167 toward the X axis direction positive side, that is, toward the third group frame unit 44 side.
- the recessed space 166 and the recessed space 167 are a diaphragm provided to project from the third group frame unit 44 to the negative side in the X-axis direction. It is formed at a position facing each of the actuator 202 for the shutter and the actuator 203 for the shutter in the X-axis direction. Therefore, as shown in FIG. 28, when the optical system 35 is moved to the telephoto side and the shutter unit 60 is moved to the position closest to the second group frame unit 42 side, the diaphragm actuator 202 is fitted in the recessed space 166. The shutter actuator 203 fits into the recess space 167.
- the diaphragm actuator 202 and the shutter actuator 203 are spaced apart in the Z-axis direction with the second optical axis A2 in between, and the distance between the two group frames It is larger than 150 Z-axis direction width. For this reason, when the shutter unit 60 moves to a position closest to the second group frame unit 42 side, the second group frame 150 fits in the Z-axis direction intermediate portion between the aperture activator 202 and the shutter activator 203.
- the movable range of the third lens group G3 in the X-axis direction can be increased. That is, the maximum distance in the X-axis direction between the third lens group G3 and the CCD 37 can be increased while the lens barrel 31 is compactly formed in the X-axis direction.
- the optical system 35 changes the imaging magnification on the CCD 37 (see FIG. 26).
- the fourth group frame unit 45 corrects the shift in the focus adjustment state caused by the change in the imaging magnification.
- the correction is performed by driving the fourth group frame unit 45 in the X-axis direction by a voice coil type linear motor composed of the coil 68 of the fourth group frame unit 45 and the magnetic member 76 of the master flange unit 46. Yes (see Figure 24).
- the motor unit 32 is arranged on the negative side in the X-axis direction of the second group frame unit 42 using a space 195 formed on the negative side in the Y axis direction of the first group frame unit 41. ing.
- the members constituting the optical system 35 are not arranged, and the members constituting the imaging device 2 can be arranged by effectively using the space that does not affect the optical system 35. It is possible to improve the utilization efficiency.
- the imaging device 2 can be extended in multiple stages in the direction of the first optical axis A1, and can be retracted. It has a barrel-type first group frame unit 41. Furthermore, a bending optical system is adopted as the optical system 35. Therefore, it is possible to increase the optical path length from the first lens group G1 to the CCD 37 while configuring the imaging device 2 in a compact manner, and it is possible to configure a zoom lens system with a high magnification.
- the first lens group G1 and the third lens group G3 change the relative positions on the optical path with respect to the CCD 37. Therefore, it is possible to construct a zoom lens system with higher optical performance.
- the drive frame 51 is rotationally driven around the first optical axis A1 by the zoom motor 36, thereby moving in the direction along the first optical axis A1 with respect to the second group frame unit including the prism L5. Further, the first group frame 50 moves in the direction along the first optical axis A1 with respect to the drive frame 51 by the drive of the drive frame 51.
- the driving force from the zoom motor 36 is transmitted to the first group frame 50 via the drive frame 51. For this reason, a special motor for driving the first group frame 50 is not necessary, and the imaging apparatus 2 can be configured more simply.
- the fixed frame 52 of the first group frame unit 41 is directly fixed to the second group frame unit 42 that fixes the prism L5.
- the fixed frame 52 supports the first group frame 50 and the drive frame 51 so as to be movable in the direction of the first optical axis A1. Therefore, positioning of the first lens group G1 with respect to the prism L5, particularly positioning in the direction orthogonal to the first optical axis A1, can be performed with high accuracy.
- the drive frame 51 is disposed on the inner peripheral side of the fixed frame 52, and the first group frame 50 is disposed on the inner peripheral side of the drive frame 51.
- the drive frame 51 is movable in the first optical axis A1 direction while engaging the cam pins ll la to ll lc with the cam grooves 128a to 128c of the fixed frame 52.
- the first group frame 50 engages the cam pins 104a to 104c with the cam grooves 128a to 128c of the drive frame 51, and further engages the front end portions 107a and 107b with the rectilinear grooves 129a and 129b in the first optical axis Al direction. It is movable.
- the imaging device 2 since the front end portions 107a and 107b are engaged with the rectilinear grooves 129a and 129b and go straight, the rotation of the first group frame 50 around the first optical axis A1 is prevented. For this reason, the imaging device 2 Therefore, it is possible to more easily configure the imaging device 2 that does not require a rectilinear frame for moving the first group frame 50 straight.
- the extension portions 126a and 126b are provided only on the X axis direction negative side of the cylindrical portion 125. Therefore, as described with reference to FIG. 26, the third group frame unit 44 can move in the X-axis direction without interfering with the fixed frame 52.
- the imaging device 2 includes a third group moving mechanism 57 that moves the third group frame unit 44 that holds the third lens group G3 in a direction along the second optical axis A2.
- the first group frame unit 41 and the third group moving mechanism 57 are functionally connected via a drive gear 53 driven by a zoom motor 36. This eliminates the need for a mechanism for driving the first group frame unit 41 and the third group moving mechanism 57, and allows the imaging apparatus 2 to be configured more simply. This also leads to noise reduction of the imaging device 2. Further, since both the ring gear 112 of the driving frame 51 of the first group frame unit 41 and the ring gear 180 of the third group moving mechanism 57 are driven in combination with the force driving gear 53, the first group frame unit 41 can be easily connected to the first group frame unit 41. The operation with the third group moving mechanism 57 can be linked.
- the third group moving mechanism 57 is engaged with the ring gear 180 and the ring gear pin 181 that convert the rotation drive from the zoom motor 36 into the drive along the second optical axis A2, and the ring gear pin 181. And a rod unit 182 that moves in a direction along the second optical axis A2. For this reason, the first lens group G1 is moved in the direction along the first optical axis A1, the first group frame unit 41, and the third lens group G3 is moved in the direction along the second optical axis A2.
- the moving mechanism 57 can be driven by the same driving means.
- an elastic coupling mechanism that inertialy couples the ring gear 180 and the rod 183 is configured by the crimp panel 186, the panel pin 187, and the crimp panel control pin 185.
- the elastic coupling mechanism presses the rod 183 toward the X axis direction positive side when the rod 183 is positioned at the end on the X axis direction positive side.
- the rod 183 is positioned at the end on the negative side in the X-axis direction.
- the rod 183 is pressed toward the negative side in the X-axis direction.
- rattling of the rod 183 and the third group frame unit 44 that moves together with the rod 183 can be prevented.
- One end of the third group guide poles 70 and 71 for guiding the movement of the third group frame unit 44 in the X-axis direction is fixed to the second group frame unit 42 including the second lens group G2. Therefore, the positioning of the third group frame unit 44 with respect to the second group frame unit 42, particularly the positioning in the direction orthogonal to the second optical axis A2, can be performed with high accuracy.
- a part of the motor unit 32 is disposed in a space opposite to the third group frame unit 44 with the reflection surface L5a of the prism L5 interposed therebetween. Therefore, the members constituting the optical system 35 are not arranged, and it is possible to arrange the members constituting the imaging device 2 by effectively using the space that does not affect the optical system 35. Usage efficiency can be improved.
- an aperture actuator 202 and a shutter actuator 203 are formed so as to protrude toward the second group frame unit 42 side.
- the second group frame 150 of the second group frame unit 42 is fitted in the intermediate portion in the Z-axis direction between the aperture actuator 202 and the shutter actuator 203 when the shutter unit 60 and the second group frame unit 42 are close to each other. . This makes it possible to reduce the size of the imaging device 2 in the direction along the second optical axis.
- the sixth lens L6 and the seventh lens L7 are supported on the X axis direction negative side by fixing the opening member 159 to the second group frame 150.
- the aperture member 159 blocks unnecessary light in the unnecessary direction out of the light emitted from the seventh lens L7, and supports the sixth lens L6 and the seventh lens L7 on the negative side in the X-axis direction. . For this reason, it is possible to reduce the number of constituent members of the imaging device 2 and achieve an effect of cost reduction.
- the digital camera 1 includes the imaging device 2, the effects of the imaging device 2 can be achieved.
- the direction along the second optical axis A2 is approximately the same as the horizontal direction. To do.
- the normal direction of the digital camera 1 coincides with the horizontal direction in the normal imaging state where the vertical direction of the subject is aligned with the vertical direction of the short side of the captured subject image.
- the vertical dimension in the normal imaging state can be reduced as compared with a digital camera that performs imaging by aligning the short direction of the digital camera with the horizontal direction. .
- the direction along the second optical axis A 2 is substantially parallel to the long side direction of the image display unit 18.
- the long side direction of the image display unit 18 is substantially parallel to the longitudinal direction of the exterior unit 11. For this reason, in a normal shooting state in which imaging is performed with the long side direction of the image display unit 18 aligned with the substantially horizontal direction, it is possible to perform imaging with the longitudinal direction of the exterior unit 11 aligned with the approximately horizontal direction. . In addition, it is possible to reduce the size of the image display unit 18 in the short side direction compared to a digital camera in which the direction along the second optical axis A2 is substantially parallel to the short side direction of the image display unit 18. Become.
- a grip portion 12 is formed on the positive side in the X-axis direction. Therefore, it is possible to secure a distance in the X-axis direction between the grip portion 12 and the first group frame unit 41 arranged on the X-axis direction negative side of the digital camera 1. This prevents the first lens group G1 from being caught during shooting.
- the first group frame unit 41 protrudes from the exterior portion 11 to the subject side (positive side in the Y-axis direction) during shooting. Fingers to the first lens group G1 can be prevented during shooting.
- the digital camera 1 includes an image shake correction mechanism 61. This makes it possible to take higher quality images.
- the Z-axis direction width (Wz) of the imaging device 2 is formed larger than the Y-axis direction width (Wy). For this reason, the thickness of the digital camera 1 in the direction along the first optical axis A1 can be reduced.
- the appearance and configuration of the digital camera 1 and the main body 3 described with reference to FIGS. 1 to 3 in the above embodiment are not limited to those described.
- the members constituting the digital camera 1 and the arrangement thereof are not limited to those described above.
- the appearance and configuration of the digital camera may be as shown in FIG. In FIG. 30, parts that are the same as the parts described in FIGS. 1 to 3 are given the same reference numerals, and descriptions thereof will be omitted.
- Fig. 30 (a) shows the external appearance of the digital camera 211 on the positive side in the Y-axis direction.
- the digital camera 211 includes the imaging device 2 described above, a main body part 213 having an exterior part 214 having a rectangular parallelepiped appearance, and an image display part 228 coupled to the exterior part 214 by a coupling mechanism 212.
- the image display unit 228 is attached by a coupling mechanism 212 so as to be rotatable about an axis extending in the X-axis direction, and can be folded to the Y-axis direction positive side and the Y-axis direction negative side of the exterior unit 214.
- the image display unit 228 includes a liquid crystal unit 228a for displaying an image on a surface facing the Y axis direction negative side in a state of being folded to the Y axis direction negative side of the exterior unit 214.
- the liquid crystal unit 228a is disposed on the surface facing the Y axis direction positive side in a state of being folded to the Y axis direction positive side.
- the image display unit 228 can be folded to the Y axis direction negative side of the exterior unit 214, and the liquid crystal unit 228a can be protected when the digital camera 211 is not used. It becomes.
- the image display unit 228 can be folded to the Y axis direction positive side of the exterior unit 214, and in this state, an image captured by the liquid crystal unit 228a facing the Y axis direction positive side can be visually recognized. It becomes possible to do.
- the Z-axis direction dimension Wzl of the image display unit 228 is substantially the same as the Z-axis direction dimension Wz2 of the exterior part 214, and the X-axis direction dimension Wxl is an imaging apparatus 2 that protrudes from the exterior part 214 to the positive side in the Y-axis direction.
- X-axis direction dimension Wx2 from the end on the X-axis direction positive side to the end of the exterior portion 214 on the X-axis direction positive side is substantially the same. Therefore, when the image display unit 228 is folded to the Y axis direction positive side of the exterior part 214, the image display part 228 does not protrude in the X axis direction or the Z axis direction of the exterior part 214.
- FIG. 30 (b) shows a state in which the image display unit 228 is folded to the Y axis direction positive side of the exterior part 214 and a perspective view showing members disposed on the X axis direction negative side inside the exterior part 214. It is.
- the Y-axis direction dimension Wyl of the image display unit 228 is substantially the same as the Y-axis direction dimension Wy2 of the fixed frame 52 of the imaging device 2 protruding from the exterior unit 214. Therefore, in a state where the image display unit 228 is folded to the Y axis direction positive side of the exterior unit 214, the end of the fixed frame 52 on the Y axis direction positive side and the surface of the image display unit 228 on the Y axis direction positive side The Y-axis position is almost the same.
- the imaging device 2, the main board 23, the battery 22, and the memory card 24 are arranged inside the exterior portion 214.
- FIG. 30 (c) is a perspective view showing members arranged on the Y axis direction positive side inside the exterior portion 214.
- each lens group G1 to G5 may be realized by a combination of other lenses.
- the configuration of the first group frame unit 41 is not limited to the configuration described.
- cam pins and cam grooves formed on the first group frame 50, the drive frame 51, and the fixed frame 52 may be realized by other configurations as long as they perform the same function.
- the configuration of the second group frame unit 42 is not limited to the configuration described.
- the second group frame 150 may have another structure as long as it can hold the second lens group G2. /. Industrial applicability
- the camera according to the present invention is useful in a field where both realization of a zoom lens system with a high magnification and realization of downsizing of the apparatus are required.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007542727A JPWO2007052606A1 (ja) | 2005-10-31 | 2006-10-30 | カメラ |
US12/092,193 US7782549B2 (en) | 2005-10-31 | 2006-10-30 | Camera |
CN2006800383784A CN101288026B (zh) | 2005-10-31 | 2006-10-30 | 照相机 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-316745 | 2005-10-31 | ||
JP2005316745 | 2005-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007052606A1 true WO2007052606A1 (ja) | 2007-05-10 |
Family
ID=38005759
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/321655 WO2007052606A1 (ja) | 2005-10-31 | 2006-10-30 | カメラ |
Country Status (4)
Country | Link |
---|---|
US (1) | US7782549B2 (ja) |
JP (1) | JPWO2007052606A1 (ja) |
CN (1) | CN101288026B (ja) |
WO (1) | WO2007052606A1 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7787193B2 (en) * | 2005-11-04 | 2010-08-31 | Panasonic Corporation | Imaging device and camera |
US7869702B2 (en) * | 2005-12-07 | 2011-01-11 | Panasonic Corporation | Image blur correcting device and camera |
JP2010266582A (ja) * | 2009-05-13 | 2010-11-25 | Canon Inc | 光学素子の位置決め装置 |
TW201126249A (en) * | 2010-01-18 | 2011-08-01 | Ability Entpr Co Ltd | Photographic and projection device |
US8620151B2 (en) | 2010-03-12 | 2013-12-31 | Ability Enterprise Co., Ltd. | Photographic and projection module and electronic system having the same |
KR101630307B1 (ko) * | 2010-05-12 | 2016-06-14 | 삼성전자주식회사 | 디지털 촬영 장치, 그 제어 방법, 및 컴퓨터 판독가능 저장매체 |
US9274311B2 (en) * | 2014-01-13 | 2016-03-01 | Genius Electronic Optical Co., Ltd. | Compact narrow field of view lenses for mobile devices |
JP6427944B2 (ja) * | 2014-05-08 | 2018-11-28 | ソニー株式会社 | 撮像装置 |
CN108037578B (zh) * | 2018-01-10 | 2019-10-18 | 浙江舜宇光学有限公司 | 摄像透镜系统 |
JP7381241B2 (ja) * | 2019-08-01 | 2023-11-15 | ニデックインスツルメンツ株式会社 | 光学ユニット |
CN112532818A (zh) * | 2019-09-18 | 2021-03-19 | Oppo广东移动通信有限公司 | 成像模组、成像方法和电子设备 |
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JPH0876165A (ja) * | 1994-06-28 | 1996-03-22 | Nikon Corp | 防振カメラ |
JPH11258678A (ja) * | 1998-03-11 | 1999-09-24 | Olympus Optical Co Ltd | レンズ鏡筒 |
JP2003169236A (ja) * | 2001-11-30 | 2003-06-13 | Olympus Optical Co Ltd | 電子カメラ |
JP2005121799A (ja) * | 2003-10-15 | 2005-05-12 | Olympus Corp | ズームレンズ及びそれを用いた電子撮像装置 |
JP2005300562A (ja) * | 2003-05-12 | 2005-10-27 | Konica Minolta Opto Inc | カメラ |
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US5831671A (en) * | 1992-09-10 | 1998-11-03 | Canon Kabushiki Kaisha | Image blur prevention apparatus utilizing a stepping motor |
US6295412B1 (en) | 1994-06-28 | 2001-09-25 | Nikon Corporation | Shake-proof camera |
US6037972A (en) * | 1994-10-21 | 2000-03-14 | Canon Kabushiki Kaisha | Camera |
JP2002072302A (ja) * | 2000-08-24 | 2002-03-12 | Minolta Co Ltd | カメラの調光制御装置 |
JP2002350951A (ja) * | 2001-05-29 | 2002-12-04 | Olympus Optical Co Ltd | 電子カメラ |
JP2004102089A (ja) | 2002-09-12 | 2004-04-02 | Minolta Co Ltd | 撮像装置 |
JP3731580B2 (ja) * | 2003-01-10 | 2006-01-05 | コニカミノルタフォトイメージング株式会社 | 屈曲光学系を備えたカメラ |
JP2004304827A (ja) * | 2004-05-19 | 2004-10-28 | Olympus Corp | 電子カメラ |
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2006
- 2006-10-30 JP JP2007542727A patent/JPWO2007052606A1/ja active Pending
- 2006-10-30 CN CN2006800383784A patent/CN101288026B/zh not_active Expired - Fee Related
- 2006-10-30 US US12/092,193 patent/US7782549B2/en not_active Expired - Fee Related
- 2006-10-30 WO PCT/JP2006/321655 patent/WO2007052606A1/ja active Application Filing
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JPH0876165A (ja) * | 1994-06-28 | 1996-03-22 | Nikon Corp | 防振カメラ |
JPH11258678A (ja) * | 1998-03-11 | 1999-09-24 | Olympus Optical Co Ltd | レンズ鏡筒 |
JP2003169236A (ja) * | 2001-11-30 | 2003-06-13 | Olympus Optical Co Ltd | 電子カメラ |
JP2005300562A (ja) * | 2003-05-12 | 2005-10-27 | Konica Minolta Opto Inc | カメラ |
JP2005121799A (ja) * | 2003-10-15 | 2005-05-12 | Olympus Corp | ズームレンズ及びそれを用いた電子撮像装置 |
Also Published As
Publication number | Publication date |
---|---|
US20090116123A1 (en) | 2009-05-07 |
CN101288026A (zh) | 2008-10-15 |
US7782549B2 (en) | 2010-08-24 |
CN101288026B (zh) | 2012-07-25 |
JPWO2007052606A1 (ja) | 2009-04-30 |
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