WO2016098225A1 - 光学ユニット及び内視鏡 - Google Patents
光学ユニット及び内視鏡 Download PDFInfo
- Publication number
- WO2016098225A1 WO2016098225A1 PCT/JP2014/083559 JP2014083559W WO2016098225A1 WO 2016098225 A1 WO2016098225 A1 WO 2016098225A1 JP 2014083559 W JP2014083559 W JP 2014083559W WO 2016098225 A1 WO2016098225 A1 WO 2016098225A1
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- WIPO (PCT)
- Prior art keywords
- fixed
- movable
- lens group
- optical unit
- coil
- Prior art date
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00188—Optical arrangements with focusing or zooming features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00112—Connection or coupling means
- A61B1/00114—Electrical cables in or with an endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00112—Connection or coupling means
- A61B1/00117—Optical cables in or with an endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0057—Constructional details of force transmission elements, e.g. control wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2407—Optical details
- G02B23/2423—Optical details of the distal end
- G02B23/243—Objectives for endoscopes
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
-
- G—PHYSICS
- 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
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
- H02K41/0352—Unipolar motors
- H02K41/0354—Lorentz force motors, e.g. voice coil motors
- H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
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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
-
- 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
- H04N23/555—Constructional details for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes
Definitions
- the present invention relates to an optical unit and an endoscope that drive a moving part forward and backward using a voice coil motor.
- an optical unit having an autofocus function and an electric zoom function uses a drive device for moving a movable part holding a movable lens for focusing or zooming in the optical axis direction.
- a drive device for example, a technique using an electromagnetic drive actuator using a coil and a magnet, that is, a voice coil motor has been disclosed (see Patent Document 1).
- An embodiment according to the present invention is to provide an optical unit and an endoscope that are reduced in size and weight to drive a movable part forward and backward with respect to a fixed part using a voice coil motor.
- An optical unit includes: A cylindrical fixed portion holding at least one of the object side fixed lens group and the image side fixed lens group, and at least a part of which is centered on a predetermined axis;
- a movable lens group is held between the object-side fixed lens group and the image-side fixed lens group, and is disposed on the radially inner side of the fixed part, and has a cylindrical movable part centered on the axis;
- the movable part is moved relative to the fixed part in the axial direction by a coil arranged in the fixed part and a magnet which is arranged in the movable part and magnetically polarized in a direction perpendicular to the axis.
- the movable part has a movable sliding surface that can slide on the inner periphery of the fixed part, In the axial direction of the movable part, the distance from the most object side position to the most image side position of the movable side sliding surface is from the exit surface of the object side fixed lens group held by the fixed part to the fixed part. Is longer than the distance to the incident surface of the image side fixed lens group held by the lens.
- an optical unit and an endoscope that are reduced in size and weight to drive the movable part forward and backward using a voice coil motor.
- FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
- FIG. 3 is a sectional view taken along line III-III in FIG. 1. It is a figure which shows the fixing
- FIG. 3 is a sectional view taken along the line VIII-VIII in FIG. 2 showing only a voice coil motor.
- FIG. 22 is a sectional view taken along line XXII-XXII in FIG. 21. It is a figure which shows an example of the endoscope provided with the imaging device of this embodiment.
- FIG. 1 is a cross-sectional view showing the optical unit of the first embodiment.
- 2 is a cross-sectional view taken along the line II-II in FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
- FIG. 1 is also a cross-sectional view taken along the line II of FIG.
- the optical unit 1 of the present embodiment has a fixed portion 2, a movable portion 3 that is movable with respect to the fixed portion 2 and holds the movable lens group Gv, and a fixed portion 2. And a voice coil motor 10 that generates a driving force for moving the movable portion 3.
- the fixed unit 2 holds the fixed unit main body 20 and the object side fixed lens group Gf on the object side of the movable lens group Gv and is attached to the object side of the fixed unit main body 20. It includes a front frame portion 4 and a rear frame portion 5 that holds the image side fixed lens group Gb on the image side of the movable lens group Gv and is attached to the image side of the fixed portion main body 20.
- FIG. 4 is a diagram illustrating a fixing unit main body of the optical unit according to the first embodiment.
- the fixing portion main body 20 is formed of a cylindrical member centered on a predetermined axis C.
- the fixed portion main body 20 of the first embodiment includes a cylindrical portion 21 centering on the axis C, an object-side thick portion 22 and an image-side thick portion 23 formed on the object side in the axial direction of the cylindrical portion 21, Have
- the hollow portion 21a is formed in the cylindrical portion 21 in part.
- four thinned portions 21a are formed every 90 ° with the axis C of the cylindrical portion 21 as the center.
- the inner surface in the radial direction of the cylindrical portion 21 excluding the lightening portion 21 a is a cylindrical cylindrical surface, which is a fixed-side sliding surface 24 that guides and supports the movable portion 3. Therefore, the fixed-side sliding surface 24 has a shape divided in the circumferential direction by the thinned portion 21a.
- the object-side thick portion 22 is formed so as to protrude from the cylindrical portion 21 radially outward and radially inward.
- the image-side thick portion 23 is formed to protrude outward in the radial direction from the cylindrical portion 21.
- a groove 23 c is formed in the fixed-side sliding surface 24 on the radially inner side of the image-side thick portion 23.
- FIG. 5 is a diagram illustrating a front frame portion of the optical unit according to the first embodiment.
- the front frame part 4 is a cylindrical member having an outer peripheral part 41 and an inner peripheral part 42.
- the outer peripheral part 41 has the 1st outer peripheral part 41a, the 2nd outer peripheral part 41b, and the outer peripheral side convex part 41c.
- the inner peripheral portion 42 includes a first inner peripheral portion 42a, a second inner peripheral portion 42b, and an inner peripheral convex portion 42c.
- the first outer peripheral portion 41a has a larger diameter than the second outer peripheral portion 41b. Between the 1st outer peripheral part 41a and the 2nd outer peripheral part 41b, it has the largest outer peripheral side convex part 41c which protruded to radial direction outer side.
- the first inner peripheral portion 42a has a larger diameter than the second inner peripheral portion 42b. Between the 1st inner peripheral part 42a and the 2nd inner peripheral part 42b, it has the inner peripheral side convex part 42c of the smallest diameter which protruded to radial inside.
- the object side fixed lens group Gf is held on the front frame portion 4.
- the front frame portion 4 holds the front first lens Lf1 on the first inner peripheral portion 42a and the front second lens Lf2 on the second inner peripheral portion 42b. Further, it is preferable that the image side of the front first lens Lf1 and the object side of the front second lens Lf2 are held in contact with the convex portion 42c.
- the front frame portion 4 has a second outer peripheral portion 41b in contact with the inner peripheral surface 22a of the object-side thick portion 22 of the fixed portion main body 20, while the object-side end surface 22b of the fixed portion main body 20 is in contact with the second outer peripheral portion 41b. It is inserted until it comes into contact with the step portion 41d with the outer peripheral convex portion 41c.
- FIG. 6 is a diagram illustrating a rear frame portion of the optical unit according to the first embodiment.
- the rear frame part 5 is a cylindrical member having an outer peripheral part 51 and an inner peripheral part 52.
- the outer peripheral part 51 has the 1st outer peripheral part 51a, the 2nd outer peripheral part 51b, and the 3rd outer peripheral part 51c.
- the inner peripheral portion 52 includes a first inner peripheral portion 52a, a second inner peripheral portion 52b, and an inner peripheral convex portion 52c.
- the first outer peripheral portion 51a has a smaller diameter than the second outer peripheral portion 51b, and the second outer peripheral portion 51b has a smaller diameter than the third outer peripheral portion 51c.
- the first inner peripheral portion 52a has a smaller diameter than the second inner peripheral portion 52b.
- the end on the most object side of the first inner peripheral portion 52a has the innermost convex portion 52c having the smallest diameter projecting radially inward.
- the image side fixed lens group Gb is held in the rear frame portion 5.
- the rear frame portion 5 holds the rear first lens Lb1 and the rear second lens Lb2 on the first inner peripheral portion 52a.
- the object side of the front first lens Lf1 is held in contact with the inner peripheral convex portion 52c.
- the rear frame portion 5 has the second outer peripheral portion 51b in contact with the fixed-side sliding surface 24 of the image-side thick portion 23 of the fixed-portion main body 20, while the image-side end surface 23a of the fixed-portion main-body 20 is the second outer peripheral portion. It is inserted until it comes into contact with the step 51d between 51b and the third outer peripheral portion 51c.
- FIG. 7 is a diagram illustrating a movable part of the optical unit according to the first embodiment.
- the movable portion 3 of the first embodiment is formed of a cylindrical member having a predetermined axis C as a center and having an outer peripheral portion 31 and an inner peripheral portion 32.
- the outer peripheral part 31 of the movable part 3 is formed on the cylindrical part 31a, both ends of the cylindrical part 31a in the axis C direction, the protruding edge part 31b having a larger outer diameter than the cylindrical part 31a, and the outer periphery of the protruding edge part 31b.
- a movable sliding surface 31c composed of a surface, a flat surface portion 31d formed on a part on the radially outer side of the protruding edge portion 31b, and a radial direction between the flat surface portions 31d at both ends in the axis C direction rather than the cylindrical portion 31a.
- the cylindrical part 31a and the protruding edge part 31b of the movable part 3 may be configured to assemble separate members.
- the inner peripheral part 32 of the movable part 3 has a first inner peripheral part 32a, a second inner peripheral part 32b, a third inner peripheral part 32c, and a convex part 32d.
- the second inner peripheral portion 32b has a smaller diameter than the first inner peripheral portion 32a and the third inner peripheral portion 32c.
- the movable part 3 holds the movable lens group Gv.
- the movable portion 3 holds the movable lens Lv on the second inner peripheral portion 32b.
- the image side of the movable lens Lv is preferably held in contact with the inner peripheral convex portion 32d.
- the movable portion 3 forms a movable side sliding surface 31c in which the outer peripheral surface of the protruding portion 31b slides with the fixed side sliding surface 24 of the fixed portion main body 20, and the movable side sliding surface 31c is the fixed side sliding surface.
- 24 is inserted into the fixing portion main body 20 while being in contact with 24.
- it inserts so that the 1st outer peripheral part 51a of the rear frame part 5 may oppose the radial inside of the 3rd inner peripheral part 32c of the movable part 3.
- FIG.2 and FIG.3 it inserts so that the 1st outer peripheral part 51a of the rear frame part 5 may oppose the radial inside of the 3rd inner peripheral part 32c of the movable part 3.
- At least a part of the image side fixed lens group Gb exists on the radially inner side of the third inner peripheral portion 32 c of the movable portion 3. Further, when the movable part 3 moves to the most object side, at least a part of the object-side fixed lens group Gf exists on the radially inner side of the first inner peripheral part 32 a of the movable part 3.
- the distance L1 from the most object side position to the most image side position of the movable side sliding surface 31c of the movable unit 3 is It is longer than the distance L2 from the exit surface of the object side fixed lens group Gf held by the front frame portion 4 of the fixed portion 2 to the incident surface of the image side fixed lens group Gb held by the rear frame portion 5 of the fixed portion 2.
- the chamfered portion is not included in the distance from the most object side position to the most image side position of the movable side sliding surface 31c of the movable unit 3.
- Such a configuration makes it possible to reduce the size in the direction of the axis C. Moreover, the inclination of the movable part 3 can be suppressed and it can be reduced in size in the radial direction.
- the voice coil motor 10 includes a coil 11 disposed in the fixed portion main body 20 of the fixed portion 2 and a magnet 12 disposed in the movable portion 3 so as to face the coil 11.
- the coil 11 includes a first coil 11 a wound around the outer periphery of the cylindrical portion 21 of the fixed portion main body 20, and the fixed portion main body 20 side by side in the axis C direction of the first coil 11 a. And a second coil 11b wound around the outer periphery of the cylindrical portion 21.
- the coil 11 may be disposed later after being wound in advance.
- the first coil 11a and the second coil 11b adjacent in the direction of the axis C are preferably connected in series, but may be connected in parallel.
- the 1st coil 11a and the 2nd coil 11b have the planes 11ap and 11bp corresponding to the thinning part 21a of the fixing
- the magnet 12 is the movable part 3 every 90 degrees with respect to the axial center so that it may oppose the inner side of the plane parts 11ap and 11bp of the 1st coil 11a and the 2nd coil 11b.
- the first magnet 12a and the second magnet 12b are arranged side by side in the axial direction on the step portion 31e. Therefore, the first magnet 12 a and the second magnet 12 b can be stably installed, a stable magnetic field is formed, and it is possible to suppress blurring of the movable part 3 that moves relative to the fixed part 2.
- the total width of the first coil 11a and the second coil 11b in the direction of the axis C is longer than the width of the first magnet 12a and the second magnet 12b in the direction of the axis C. It is preferable to set the first magnet 12a and the second magnet 12b so that they always exist within the width of the first coil 11a and the second coil 11b in the axis C direction.
- the magnets 12 are installed every 90 ° with the axis C as the center.
- the magnets 12 are not limited to 90 °, and a plurality of magnets 12 may be installed at other angles.
- FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 1, showing only the voice coil motor.
- FIG. 9 is a sectional view showing only the voice coil motor of FIG.
- the set of the first magnet 12a and the set of the second magnet 12b are arranged in parallel with each other in the axis C direction.
- the set of the first magnet 12a and the set of the second magnet 12b are preferably magnetized in the radial direction, and the magnetic poles are opposite to each other.
- the first magnet 12a has an N pole on the first coil 11a side and an S pole on the opposite side
- the second magnet 12b has an S pole on the second coil 11b side and an N pole on the opposite side. That is, as shown in FIGS. 8 and 9, it is preferable to set the magnetic polarization direction of each magnet 12 in a direction orthogonal to the axis C as indicated by each white arrow A.
- the winding direction of the coil 11 is reversed between the set of the first magnet 12a and the set of the second magnet 12b.
- the second coil 11b may be wound in the opposite direction.
- the winding direction of the first coil 11a and the second coil 11b may be the same, and the first coil 11a and the second coil 11b may be connected so that the current direction is reversed.
- FIG. 8 when a current is passed through the first coil 11 a in the direction of arrow B, it is only necessary that the current flows through the second coil 11 b in the direction opposite to arrow B.
- the movable part 3 which has installed the 1st magnet 12a facing the 1st coil 11a, respectively is arrange
- the flat portion 11ap of the first coil 11a exists in a magnetic field in a direction orthogonal to the radially outer surface 121a of the first magnet 12a.
- the second magnet 12b is configured similarly. Therefore, driving efficiency is improved and the movable part 3 can be moved quickly. Moreover, it becomes possible to assemble easily by forming the outer surfaces 121a, 121b in the radial direction of the first magnet 12a and the second magnet 12b as flat surfaces.
- the outer peripheral surface of the protruding portion 31 b of the movable portion 3 constitutes a movable sliding surface 31 c that contacts the fixed sliding surface 24 of the fixed portion main body 20.
- the optical unit 1 is preferably formed symmetrically with respect to the axis C.
- the entire optical unit 1 is formed symmetrically with respect to the axis C, thereby C can be disposed on C, and the inclination of the movable portion 3 with respect to the fixed portion 2 can be further suppressed.
- the optical unit 1 of the present embodiment can be formed in a small size and light weight, the driving efficiency is improved, and the movable portion 3 can be operated quickly. Further, even during operation, the fixed side sliding surface 24 of the fixed unit main body 20 and the movable side sliding surface 31c of the movable unit 3 are in contact with each other, so that the inclination of the movable unit 3 with respect to the fixed unit 2 can be suppressed. It becomes possible to move the part 3 accurately.
- FIG. 10 is a diagram illustrating an optical unit according to the second embodiment.
- FIG. 11 is a diagram illustrating a fixing unit main body of the optical unit according to the second embodiment.
- the optical unit 1 of the second embodiment has a structure in which the front frame portion 4 of the first embodiment is formed integrally with the fixed portion main body 20.
- the object-side thick portion 22 of the fixed portion main body 20 is extended to the object side, and the first inner peripheral portion 22c and the second inner peripheral portion 22d are arranged radially inward of the object-side thick portion 22.
- the convex part 22e is formed.
- the first inner peripheral portion 22c has a larger diameter than the second inner peripheral portion 22d. Between the 1st inner peripheral part 22c and the 2nd inner peripheral part 22d, it has the convex part 22e of the smallest diameter which protruded to radial inside.
- the object-side thick portion 22 holds the object-side fixed lens group Gf.
- the object-side thick portion 22 holds the front first lens Lf1 on the first inner peripheral portion 22c and the front second lens Lf2 on the second inner peripheral portion 22d.
- the image side of the front first lens Lf1 and the object side of the front second lens Lf2 are preferably held in contact with the convex portion 22e.
- the movable portion 3 forms a movable side sliding surface 31c in which the outer peripheral surface of the protruding portion 31b slides with the fixed side sliding surface 24 of the fixed portion main body 20, and the movable side sliding surface 31c is the fixed side sliding surface.
- 24 is inserted into the fixing portion main body 20 while being in contact with 24.
- it inserts so that the 1st outer peripheral part 51a of the rear frame part 5 may oppose the radial inside of the 3rd inner peripheral part 32c of the movable part 3.
- at least a part of the object-side fixed lens group Gf exists on the radially inner side of the first inner peripheral part 32 a of the movable part 3.
- the distance L1 from the most object side position to the most image side position of the movable side sliding surface 31c of the movable part 3 is More than the distance L2 from the exit surface of the object-side fixed lens group Gf held by the object-side thick portion 22 of the fixed portion 2 to the entrance surface of the image-side fixed lens group Gb held by the rear frame portion 5 of the fixed portion 2. long. Note that the chamfered portion is not included in the distance from the most object side position to the most image side position of the movable side sliding surface 31c of the movable unit 3.
- Such a configuration makes it possible to reduce the size in the direction of the axis C. Moreover, the inclination of the movable part 3 can be suppressed and it can be reduced in size in the radial direction. Furthermore, since the front frame portion 4 is not provided, the number of parts and the assembly process can be reduced, and the cost can be reduced.
- FIG. 12 is a diagram showing an optical unit according to the third embodiment.
- FIG. 13 is a diagram illustrating a fixing unit main body of the optical unit according to the third embodiment.
- the optical unit 1 of the third embodiment has a structure in which the rear frame portion 5 of the first embodiment is formed integrally with the fixed portion main body 20.
- the image side thick portion 23 of the fixed portion main body 20 is extended to the image side, and the first inner peripheral portion 23d, the inner cylindrical portion 23e, And the axial direction recessed part 23f is formed.
- the first inner peripheral portion 23d is formed to protrude inward in the radial direction of the image-side thick portion 23.
- the inner cylindrical portion 23e is a cylindrical portion extending from the first inner peripheral portion 23d to the object side in the axial direction.
- the image side fixed lens group Gb is held in the inner cylindrical portion 23e of the image side thick portion 23.
- the image-side thick portion 23 holds the rear first lens Lb1 and the rear second lens Lb2 on the inner cylindrical portion 23e.
- the axial recessed portion 23f is formed between the radially outer side of the inner cylindrical portion 23e and the fixed-side sliding surface 24, and a part of the movable portion 3 is inserted therein.
- a second inner peripheral portion 23g having a larger diameter than the first inner peripheral portion 23d is formed on the image side of the first inner peripheral portion 23d.
- a sensor or the like can be attached to the second inner peripheral portion 23g.
- a groove 22f is formed in the stationary-side sliding surface 24 on the radially inner side of the object-side thick portion 22.
- the movable portion 3 forms a movable side sliding surface 31c in which the outer peripheral surface of the protruding portion 31b slides with the fixed side sliding surface 24 of the fixed portion main body 20, and the movable side sliding surface 31c is the fixed side sliding surface.
- 24 is inserted into the fixing portion main body 20 while being in contact with 24.
- it inserts so that the inner side cylindrical part 23e of the fixing
- the distance L1 from the most object side position to the most image side position of the movable side sliding surface 31c of the movable part 3 is From the exit surface of the object-side fixed lens group Gf held by the front frame portion 4 of the fixed portion 2, the incident surface of the image-side fixed lens group Gb held by the inner cylindrical portion 23e of the image-side thick portion 23 of the fixed portion 2 It is longer than the distance L2. Note that the chamfered portion is not included in the distance from the most object side position to the most image side position of the movable side sliding surface 31c of the movable unit 3.
- Such a configuration makes it possible to reduce the size in the direction of the axis C. Moreover, the inclination of the movable part 3 can be suppressed and it can be reduced in size in the radial direction. Furthermore, since the rear frame portion 5 is not provided, the number of parts and the assembly process can be reduced, and the cost can be reduced.
- FIG. 14 is a diagram showing an optical unit of the fourth embodiment.
- FIG. 15 is a diagram illustrating a fixing unit main body of the optical unit according to the fourth embodiment.
- the optical unit 1 of the fourth embodiment has a structure in which the front frame portion 4 and the rear frame portion 5 of the first embodiment are formed integrally with the fixed portion main body 20.
- the object-side thick portion 22 of the fixed portion main body 20 is extended to the object side, and the first inner peripheral portion 22 c and the stepped portion 22 g are formed on the radially inner side of the object-side thick portion 22. .
- the first inner peripheral portion 22 c has a larger diameter than the fixed side sliding portion 24.
- the step portion 22 g is formed between the first inner peripheral portion 22 c and the fixed side sliding portion 24.
- the object-side thick portion 22 holds the object-side fixed lens group Gf.
- the object-side thick portion 22 holds the cemented lens of the front first lens Lf1 and the front second lens Lf2 on the first inner peripheral portion 22c.
- the image side of the front first lens Lf1 is preferably held in contact with the stepped portion 22g.
- the image-side thick portion 23 of the fixed portion main body 20 is extended to the image side, and the first inner peripheral portion 23d and the inner cylindrical portion are disposed radially inside the image-side thick portion 23. 23e and an axial recess 23f are formed.
- the first inner peripheral portion 23d is formed to protrude inward in the radial direction of the image-side thick portion 23.
- the inner cylindrical portion 23e is a cylindrical portion extending from the first inner peripheral portion 23d to the object side in the axial direction.
- the image side fixed lens group Gb is held in the inner cylindrical portion 23e of the image side thick portion 23.
- the image-side thick portion 23 holds the rear first lens Lb1 and the rear second lens Lb2 on the inner cylindrical portion 23e.
- the axial recessed portion 23f is formed between the radially outer side of the inner cylindrical portion 23e and the fixed-side sliding surface 24, and a part of the movable portion 3 is inserted therein.
- a second inner peripheral portion 23g having a larger diameter than the first inner peripheral portion 23d is formed on the image side of the first inner peripheral portion 23d.
- a sensor or the like can be attached to the second inner peripheral portion 23g.
- the movable portion 3 forms a movable side sliding surface 31c in which the outer peripheral surface of the protruding portion 31b slides with the fixed side sliding surface 24 of the fixed portion main body 20, and the movable side sliding surface 31c is the fixed side sliding surface.
- 24 is inserted into the fixing portion main body 20 while being in contact with 24.
- it inserts so that the inner side cylindrical part 23e of the fixing
- the distance L1 from the most object side position to the most image side position of the movable side sliding surface 31c of the movable unit 3 in the axis C direction is From the exit surface of the object side fixed lens group Gf held by the first inner peripheral part 22c of the fixed part 2, the image side fixed lens group Gb held by the inner cylindrical part 23e of the image side thick part 23 of the fixed part 2 It is longer than the distance L2 to the incident surface. Note that the chamfered portion is not included in the distance from the most object side position to the most image side position of the movable side sliding surface 31c of the movable unit 3.
- Such a configuration makes it possible to reduce the size in the direction of the axis C. Moreover, the inclination of the movable part 3 can be suppressed and it can be reduced in size in the radial direction. Furthermore, since the front frame part 4 and the rear frame part 5 are not provided, the number of parts and the assembly process can be reduced, and the cost can be reduced.
- FIG. 16 is a diagram showing an optical unit according to the fifth embodiment, in which the movable part 3 is located closest to the object side.
- FIG. 17 is a diagram illustrating the optical unit after movement according to the fifth embodiment, in which the movable portion 3 is located closest to the image side.
- FIG. 18 is a diagram illustrating a movable part of the optical unit according to the fifth embodiment.
- FIG. 19 is a diagram illustrating a rear frame portion of the optical unit according to the fifth embodiment.
- the optical unit 1 of the fifth embodiment is movable with respect to the fixed unit 2, the movable unit 3 that is movable with respect to the fixed unit 2 and holds the movable lens group Gv, and the movable unit 3. And a voice coil motor 10 that generates a driving force for moving the unit 3.
- the fixed unit 2 holds the fixed unit main body 20 and the object side fixed lens group Gf on the object side of the movable lens group Gv and is attached to the object side of the fixed unit main body 20.
- the front frame part 4 and the rear frame part 5 attached to the image side of the fixed part main body 20 are included.
- the optical unit 1 of the fifth embodiment does not hold the lens group in the rear frame portion 5.
- the outer peripheral part 31 of the movable part 3 is formed on the cylindrical part 31a, both ends of the cylindrical part 31a in the axis C direction, the protruding edge part 31b having a larger outer diameter than the cylindrical part 31a, and the outer periphery of the protruding edge part 31b.
- a movable sliding surface 31c composed of a surface, a flat surface portion 31d formed on a part on the radially outer side of the protruding edge portion 31b, and a radial direction between the flat surface portions 31d at both ends in the axis C direction rather than the cylindrical portion 31a.
- the cylindrical part 31a and the protruding edge part 31b of the movable part 3 may be configured to assemble separate members.
- the inner peripheral part 32 of the movable part 3 has a first inner peripheral part 32a, a second inner peripheral part 32b, and a convex part 32d.
- the second inner peripheral portion 32b has a smaller diameter than the first inner peripheral portion 32a.
- the movable part 3 holds the movable lens group Gv.
- the movable portion 3 holds the movable lens Lv on the second inner peripheral portion 32b.
- the image side of the movable lens Lv is preferably held in contact with the convex portion 32d.
- the movable portion 3 forms a movable side sliding surface 31c in which the outer peripheral surface of the protruding portion 31b slides with the fixed side sliding surface 24 of the fixed portion main body 20, and the movable side sliding surface 31c is the fixed side sliding surface.
- 24 is inserted into the fixing portion main body 20 while being in contact with 24.
- the front second lens Lf ⁇ b> 2 is inserted so as to face the radially inner side of the first inner peripheral portion 32 a of the movable portion 3. That is, at least a part of the object-side fixed lens group Gf exists on the radially inner side of the first inner peripheral portion 32a of the movable portion 3.
- the distance from the most object side position to the most image side position of the movable side sliding surface 31 c of the movable part 3 in the direction of the axis C. L1 is longer than the distance L3 from the exit surface of the object side fixed lens group Gf held by the front frame portion 4 of the fixed portion 2 to the incident surface of the movable lens group Gv held by the movable portion 3.
- the chamfered portion is not included in the distance from the most object side position to the most image side position of the movable side sliding surface 31c of the movable unit 3.
- Such a configuration makes it possible to reduce the size in the direction of the axis C. Moreover, the inclination of the movable part 3 can be suppressed and it can be reduced in size in the radial direction.
- the movable range can be set as large as possible. Further, at the end of the movable range, it comes into contact with the front frame portion 4 and the rear frame portion 5, so that it can be easily positioned.
- the rear frame portion 5 shown in FIG. 19 can hold a sensor or the like, and can effectively use the space.
- FIG. 20 is a diagram showing an optical unit according to the sixth embodiment.
- the optical unit 1 of the sixth embodiment has a structure in which the front frame portion 4 of the fifth embodiment is formed integrally with the fixed portion main body 20.
- the object-side thick portion 22 of the fixed portion main body 20 is extended to the object side, and the first inner peripheral portion 22c and the second inner peripheral portion 22d are arranged radially inward of the object-side thick portion 22.
- the convex part 22e is formed.
- the first inner peripheral portion 22c has a larger diameter than the second inner peripheral portion 22d. Between the 1st inner peripheral part 22c and the 2nd inner peripheral part 22d, it has the convex part 22e of the smallest diameter which protruded to radial inside.
- the fixing portion main body 20 of the fixing portion 2 of the optical unit 1 of the sixth embodiment has the same structure as the fixing portion main body 20 of the second embodiment shown in FIG. This is the same structure as the rear frame portion 5 of the fifth embodiment shown in FIG.
- the movable part 3 is the same structure as the movable part 3 of 5th Embodiment shown in FIG.
- the object-side thick portion 22 holds the object-side fixed lens group Gf.
- the object-side thick portion 22 holds the front first lens Lf1 on the first inner peripheral portion 22c and the front second lens Lf2 on the second inner peripheral portion 22d.
- the image side of the front first lens Lf1 and the object side of the front second lens Lf2 are preferably held in contact with the convex portion 22e.
- the movable portion 3 forms a movable side sliding surface 31c in which the outer peripheral surface of the protruding portion 31b slides with the fixed side sliding surface 24 of the fixed portion main body 20, and the movable side sliding surface 31c is the fixed side sliding surface.
- 24 is inserted into the fixing portion main body 20 while being in contact with 24.
- the front second lens Lf2 is inserted so as to face the inner side in the radial direction of the first inner peripheral portion 32a of the movable portion 3. That is, at least a part of the object-side fixed lens group Gf exists on the radially inner side of the first inner peripheral portion 32a of the movable portion 3.
- the distance L1 from the most object side position to the most image side position of the movable side sliding surface 31c of the movable part 3 is It is longer than the distance L3 from the exit surface of the object-side fixed lens group Gf held by the object-side thick portion 22 of the fixed portion 2 to the entrance surface of the movable lens group Gv held by the movable portion 3.
- the chamfered portion is not included in the distance from the most object side position to the most image side position of the movable side sliding surface 31c of the movable unit 3.
- Such a configuration makes it possible to reduce the size in the direction of the axis C. Moreover, the inclination of the movable part 3 can be suppressed and it can be reduced in size in the radial direction. Furthermore, since the front frame portion 4 is not provided, the number of parts and the assembly process can be reduced, and the cost can be reduced.
- FIG. 21 is a diagram showing an optical unit according to the seventh embodiment. 22 is a cross-sectional view taken along the line XXII-XXII in FIG. FIG. 21 is also a cross-sectional view taken along the line XXI-XXI in FIG.
- the optical unit 1 of the seventh embodiment includes a magnetic detector 13 for detecting magnetism and a magnetism detected by the magnetic detector 13 as shown in FIG. And a drive control unit 16 for controlling the drive current accordingly.
- the magnetic detector 13 includes, for example, a Hall element, a magnetoresistive effect element (MR element), and the like, and can detect magnetism. At least one magnetic detector 13 is installed on the outer side in the radial direction of the coil 11 by the support member 14. Note that an adhesive 15 or the like may be filled and supported between the coil 11 and the magnetic detector 13.
- the magnetic detector 13 is connected to the drive control unit 16 via a cable.
- the magnetic detector 13 may be connected to the drive control unit 16 wirelessly.
- the magnet 12 is disposed on the step portion 31 e of the movable portion 3.
- the magnetic detector 13 detects the change of the magnetic field which arises when the magnet 12 moves to the direction of the axis
- the drive control unit 16 calculates the position of the magnet 12, that is, the position of the movable unit 3 based on the change in the magnetic field detected by the magnetic detection unit 13. Thereafter, the drive control unit 16 causes a current to flow through the coil 11 according to the difference between the target position and the calculated magnet position.
- FIG. 23 is a diagram illustrating an example of an endoscope 90 including the imaging device 80 of the present embodiment.
- the endoscope 90 of the present embodiment can be introduced into a subject such as a human body and optically images a predetermined observation site in the subject.
- the subject into which the endoscope 90 is introduced is not limited to a human body, but may be another living body or an artificial object such as a machine or a building.
- the endoscope 90 includes an insertion portion 91 introduced into the subject, an operation portion 92 located at the proximal end of the insertion portion 91, and a universal cable 93 as a composite cable extending from the operation portion 92. Prepare.
- the insertion portion 91 is disposed at the distal end portion 91a disposed at the distal end, the bendable bending portion 91b disposed at the proximal end side of the distal end portion 91a, and the operation portion 92 disposed at the proximal end side of the bending portion 91b. And a flexible tube portion 91c having flexibility.
- An imaging device 80 is built in the distal end portion 91a.
- the endoscope 90 may be a rigid endoscope in which the insertion portion 91 does not have the flexible tube portion 91c.
- the operation unit 92 includes an angle operation unit 92a that operates the bending state of the bending unit 91b, and a zoom operation unit 92b that instructs the operation of the voice coil motor 10 and performs the zoom operation of the imaging device 80.
- the angle operation unit 92a is formed in a knob shape and the zoom operation unit 92b is formed in a lever shape, other types such as a volume switch and a push switch may be used.
- the universal cord 93 is a member that connects the operation unit 92 and the external device 94.
- the external device 94 is connected via a connector 93a.
- the external device 94 includes a drive control unit 94a that controls the bending state of the bending unit 91b, an image control unit 94b that controls the imaging device 80, a light source unit that is not shown, and a light source control unit 94c that controls the light source unit.
- a cable 95 such as a wire, an electric wire, or an optical fiber is inserted through the insertion portion 91, the operation portion 92, and the universal cord 93.
- the wire connects the drive control unit 94a disposed in the external device 94 to the operation unit 92 and the bending unit 91b.
- the electric line electrically connects the imaging device 80, the operation unit 92, and the image control unit 94b.
- the optical fiber optically connects the light source to the operation unit 92 and the light source control unit 94c.
- the drive control unit 94a is composed of an actuator or the like, and controls the bending state of the bending portion 91b by moving the wire forward and backward.
- the image control unit 94b performs drive control of the voice coil motor 10 built in the imaging device 80 and processing of an image captured by the imaging element.
- the image processed by the image control unit 94b is displayed on the image display unit 96.
- the light source controller 94c controls the brightness and the like of the light source emitted from the distal end portion 91a.
- the operation unit 92 and the external device 94 may be formed separately from the insertion unit 91 and may be operated and controlled by remote operation.
- the endoscope 90 configured as described above is small and can be zoomed quickly by adopting the imaging device 80 of the present embodiment, and can be suitable for moving image imaging.
- the optical unit 1 of the present embodiment at least one of the object-side fixed lens group Gf and the image-side fixed lens group Gb is held, and at least a part is a cylindrical shape centered on the predetermined axis C.
- the movable lens group Gv is held between the fixed part 2 and the object-side fixed lens group Gf and the image-side fixed lens group Gb.
- the movable lens group Gv is disposed radially inward of the fixed part 2 and has a cylindrical shape centering on the axis C.
- the movable part 3 is fixed to the fixed part 2 by the movable part 3, the coil 11 arranged in the fixed part 2, and the magnet 12 arranged in the movable part 3 and magnetically polarized in a direction perpendicular to the axis C. And the voice coil motor 10 that can be relatively moved in the direction of the axis C.
- the movable part 3 has a movable sliding surface 31c that can slide on the inner periphery of the fixed part 2, and the movable part 3 In the direction of the axis C, the position of the movable side sliding surface 31c closest to the object side Since the distance L1 to the position closest to the image side is longer than the distance from the exit surface of the object-side fixed lens group Gf held by the fixing unit 2 to the incident surface of the image-side fixed lens group Gb held by the fixing unit 2, It is possible to provide the optical unit 1 that is reduced in size and weight and that drives the movable portion 3 forward and backward with respect to the fixed portion 2 using the voice coil motor 10.
- the fixed portion 2 holds the image side fixed lens group Gb, has the fixed side sliding surface 24, and the fixed portion main body 20 on which the coil 11 is disposed.
- the front frame portion 4 that holds the object side fixed lens group Gf and is attached to the object side of the fixed portion main body 20 around the axis C is included, so that the number of parts and the assembly process can be reduced, and the cost can be reduced. It becomes possible to do.
- the fixed portion 2 holds the object side fixed lens group Gf, has the fixed side sliding surface 24, and the fixed portion main body 20 on which the coil 11 is disposed.
- a rear frame portion 5 that holds the image side fixed lens group Gb and is attached to the image side of the fixed portion main body 20 with the axis C as the center. It becomes possible to do.
- the fixed portion 2 has the fixed-side sliding surface 24, holds the fixed-portion main body 20 on which the coil 11 is disposed, and the object-side fixed lens group Gf.
- the rear frame portion 5 that holds the image side fixed lens group Gb around the axis C and is attached to the image side of the fixed portion main body 20 while holding the image side fixed lens group Gb. Therefore, the degree of freedom in design can be increased.
- the fixed unit 2 holds the object-side fixed lens group Gf and the image-side fixed lens group Gb, has the fixed-side sliding surface 24, and the coil 11 is disposed. Therefore, the number of parts and the assembly process can be reduced, and the cost can be further reduced.
- the object-side fixed lens group Gf is held, and at least a part of the cylindrical fixed portion 2 centered on the predetermined axis C and the object-side fixed lens group Gf
- the movable lens group Gv on the image side is held, and is disposed on the radially inner side of the fixed portion 2.
- the cylindrical movable portion 3 with the axis C as the center, the coil 11 disposed on the fixed portion 2, and the movable portion A voice coil motor 10 capable of moving the movable part 3 relative to the fixed part 2 in the axial direction by a magnet 12 arranged in the part 3 and magnetically polarized in a direction perpendicular to the axis C;
- the movable portion 3 has a movable sliding surface 31c that can slide on the inner periphery of the fixed portion 2, and in the direction of the axis C of the movable portion 3, from the position closest to the object side of the movable sliding surface 31c.
- the distance L1 to the position closest to the image side is the object side fixed lens held by the fixing unit 2.
- the voice coil motor 10 is used to drive the movable portion 3 forward and backward with respect to the fixed portion 2. And it becomes possible to provide the optical unit 1 reduced in weight.
- the fixed portion 2 has the fixed-side sliding surface 24, holds the fixed-portion main body 20 on which the coil 11 is disposed, and the object-side fixed lens group Gf. Since the front frame portion 4 attached to the object side of the fixed portion main body 20 around the axis C is included, the number of parts and the assembly process can be reduced, and the cost can be reduced.
- the fixed portion 2 includes the fixed portion main body 20 that holds the object-side fixed lens group Gf, has the fixed-side sliding surface 24, and in which the coil 11 is disposed. Therefore, the number of parts and the assembly process can be reduced, and the cost can be further reduced.
- the sliding axis of the movable part and the action axis of the propulsive force generated by the voice coil motor are the same. And can be driven stably.
- the fixed-side sliding surface 24 of the fixed portion 2 is formed by being divided in the circumferential direction, so that the optical unit 1 can be miniaturized with a simple structure. It becomes.
- the optical unit 1 of the present embodiment since a plurality of magnets 12 are arranged symmetrically with respect to the axis C, it is possible to stably increase the driving force.
- the magnet 12 has a set of the first magnet 12a and a set of the second magnet 12b adjacent in the axial direction, and the set of the first magnet 12a is the same.
- the pair of second magnets 12b has the same magnetic polarization direction, and the magnetic polarization direction of the adjacent first magnet 12a and the magnetic polarization direction of the second magnet 12b are opposite to each other.
- the coil 11 includes a first coil 11a facing the set of the first magnets 12a and a second coil 11b facing the set of the second magnets 12b.
- the first coil 11a and the second coil 11b are Since the current direction is reversed when a current is passed, the driving force can be increased.
- the first coil 11a and the second coil 11b are in contact with each other in the direction of the axis C, so that it is possible to further reduce the size.
- the optical unit 1 of this embodiment since the 1st magnet 12a and the 2nd magnet 12b are spaced apart in the axis C direction, a stable driving force is formed regardless of the position of the movable part 3. It becomes possible.
- the magnetic detection part 13 which detects the magnetism of the 1st magnet 12a and the 2nd magnet 12b on the radial direction outer side from the outer peripheral surface of the 1st coil 11a and the 2nd coil 11b.
- a control unit 16 that controls the drive current flowing through the coil 11 according to the detection value detected by the magnetic detection unit 13, it is possible to accurately control the drive speed and stop position of the movable unit 3. Become.
- the magnetic detection unit 13 is supported by the fixed unit 2 and detects a change in magnetism due to the movable unit 3 moving relative to the fixed unit 2 in the axis C direction. As a result, the drive speed and stop position of the movable part 3 can be detected more accurately.
- the zoom can be quickly changed in a small size.
- An endoscope suitable for moving image capturing can be obtained.
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Abstract
Description
少なくとも物体側固定レンズ群及び像側固定レンズ群のいずれか1つを保持し、少なくとも一部が所定の軸を中心とした筒形状の固定部と、
前記物体側固定レンズ群と前記像側固定レンズ群の間で可動レンズ群を保持し、前記固定部の径方向内側に配置され、前記軸を中心とした筒形状の可動部と、
前記固定部に配置されたコイル、及び、前記可動部に配置され前記軸に直交する方向に磁気分極された磁石、によって、前記可動部を前記固定部に対して、前記軸方向に相対移動させることが可能なボイスコイルモータと、
を備え、
前記可動部は、前記固定部の内周に摺動可能な可動側摺動面を有し、
前記可動部の前記軸方向において、前記可動側摺動面の最も物体側の位置から最も像側の位置までの距離が、前記固定部が保持する物体側固定レンズ群の射出面から前記固定部が保持する像側固定レンズ群の入射面までの距離よりも長い
ことを特徴とする。
2…固定部
3…可動部
4…前枠部(固定部)
5…後枠部(固定部)
10…ボイスコイルモータ
11…コイル
12…磁石
80…撮像素子
90…内視鏡
91…挿入部
Gf…物体側固定レンズ群
Gb…像側固定レンズ群
Gv…可動レンズ群
Claims (17)
- 少なくとも物体側固定レンズ群及び像側固定レンズ群のいずれか1つを保持し、少なくとも一部が所定の軸を中心とした筒形状の固定部と、
前記物体側固定レンズ群と前記像側固定レンズ群の間で可動レンズ群を保持し、前記固定部の径方向内側に配置され、前記軸を中心とした筒形状の可動部と、
前記固定部に配置されたコイル、及び、前記可動部に配置され前記軸に直交する方向に磁気分極された磁石、によって、前記可動部を前記固定部に対して、前記軸方向に相対移動させることが可能なボイスコイルモータと、
を備え、
前記可動部は、前記固定部の内周に摺動可能な可動側摺動面を有し、
前記可動部の前記軸方向において、前記可動側摺動面の最も物体側の位置から最も像側の位置までの距離が、前記固定部が保持する物体側固定レンズ群の射出面から前記固定部が保持する像側固定レンズ群の入射面までの距離よりも長い
ことを特徴とする光学ユニット。 - 前記固定部は、
前記像側固定レンズ群を保持し、固定側摺動面を有し、前記コイルが配置される固定部本体と、
前記物体側固定レンズ群を保持し、前記軸を中心として前記固定部本体の物体側に取り付けられる前枠部と、
を含む
請求項1に記載の光学ユニット。 - 前記固定部は、
前記物体側固定レンズ群を保持し、固定側摺動面を有し、前記コイルが配置される固定部本体と、
前記像側固定レンズ群を保持し、前記軸を中心として前記固定部本体の像側に取り付けられる後枠部と、
を含む
請求項1に記載の光学ユニット。 - 前記固定部は、
固定側摺動面を有し、前記コイルが配置される固定部本体と、
前記物体側固定レンズ群を保持し、前記軸を中心として前記固定部本体の物体側に取り付けられる前枠部と、
前記像側固定レンズ群を保持し、前記軸を中心として前記固定部本体の像側に取り付けられる後枠部と、
を含む
請求項1に記載の光学ユニット。 - 前記固定部は、前記物体側固定レンズ群及び前記像側固定レンズ群を保持し、固定側摺動面を有し、前記コイルが配置される固定部本体を含む
請求項1に記載の光学ユニット。 - 物体側固定レンズ群を保持し、少なくとも一部が所定の軸を中心とした筒形状の固定部と、
前記物体側固定レンズ群の像側にある可動レンズ群を保持し、前記固定部の径方向内側に配置され、前記軸を中心とした筒形状の可動部と、
前記固定部に配置されたコイル、及び、前記可動部に配置され前記軸に直交する方向に磁気分極されたた磁石、によって、前記可動部を前記固定部に対して、前記軸方向に相対移動させることが可能なボイスコイルモータと、
を備え、
前記可動部は、前記固定部の内周に摺動可能な可動側摺動面を有し、
前記可動部の前記軸方向において、前記可動側摺動面の最も物体側の位置から最も像側の位置までの距離が、前記固定部が保持する物体側固定レンズ群の射出面から前記可動部が保持する可動レンズ群の入射面までの距離よりも長い
ことを特徴とする光学ユニット。 - 前記固定部は、
固定側摺動面を有し、前記コイルが配置される固定部本体と、
前記物体側固定レンズ群を保持し、前記軸を中心として前記固定部本体の物体側に取り付けられる前枠部と、
を含む
請求項6に記載の光学ユニット。 - 前記固定部は、前記物体側固定レンズ群を保持し、前記固定側摺動面を有し、前記コイルが配置される固定部本体を含む
請求項6に記載の光学ユニット。 - 前記コイルは、前記軸を中心に巻かれている
請求項1乃至8のいずれか1つに記載の光学ユニット。 - 前記固定部の前記固定側摺動面は、周方向に分割して形成される
請求項1乃至9のいずれか1つに記載の光学ユニット。 - 前記磁石は、前記軸に対して対称に複数配置される
請求項1乃至10のいずれか1つに記載の光学ユニット。 - 前記磁石は、前記軸方向に隣り合う第1磁石の組と第2磁石の組とを有し、
前記第1磁石の組は、同一の磁気分極方向を有し、
前記第2磁石の組は、同一の磁気分極方向を有し、
隣り合う前記第1磁石の磁気分極方向と前記第2磁石の磁気分極方向は、互いに反対方向であって、
前記コイルは、前記第1磁石の組に対向する第1コイルと、前記第2磁石の組に対向する第2コイルと、を有し、
前記第1コイルと前記第2コイルは、電流を流した際に電流方向が反転するように接続されている
請求項1乃至11のいずれか1つに記載の光学ユニット。 - 前記第1コイルと前記第2コイルは、前記軸方向に当接している
請求項12に記載の光学ユニット。 - 前記第1磁石と前記第2磁石は、前記軸方向に離間している
請求項12又は13に記載の光学ユニット。 - 前記第1コイルと前記第2コイルの外周面よりも径方向外側に、前記第1磁石と前記第2磁石の磁気を検出する磁気検出部と、
前記磁気検出部が検出した検出値に応じて前記コイルに流れる駆動電流を制御する制御部と、
を備える
請求項12乃至14のいずれか1つに記載の光学ユニット。 - 前記磁気検出部は、前記固定部に支持され、前記可動部が前記固定部に対して前記軸方向に相対移動することによる磁気の変化を検出する
請求項15に記載の光学ユニット。 - 請求項1乃至16のいずれか1つに記載の光学ユニットと、
前記光学ユニットを通過した光が入射する撮像素子と、
を備えることを特徴とする内視鏡。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2014/083559 WO2016098225A1 (ja) | 2014-12-18 | 2014-12-18 | 光学ユニット及び内視鏡 |
JP2016564529A JP6532481B2 (ja) | 2014-12-18 | 2014-12-18 | 光学ユニット及び内視鏡 |
CN201480084050.0A CN107003494B (zh) | 2014-12-18 | 2014-12-18 | 光学单元和内窥镜 |
DE112014006987.6T DE112014006987B4 (de) | 2014-12-18 | 2014-12-18 | Optische Einheit und Endoskop |
US15/606,444 US10149606B2 (en) | 2014-12-18 | 2017-05-26 | Optical unit and endoscope |
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PCT/JP2014/083559 WO2016098225A1 (ja) | 2014-12-18 | 2014-12-18 | 光学ユニット及び内視鏡 |
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US15/606,444 Continuation US10149606B2 (en) | 2014-12-18 | 2017-05-26 | Optical unit and endoscope |
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WO2016098225A1 true WO2016098225A1 (ja) | 2016-06-23 |
Family
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Country | Link |
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US (1) | US10149606B2 (ja) |
JP (1) | JP6532481B2 (ja) |
CN (1) | CN107003494B (ja) |
DE (1) | DE112014006987B4 (ja) |
WO (1) | WO2016098225A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019211935A1 (ja) * | 2018-05-01 | 2019-11-07 | オリンパス株式会社 | 光学ユニット |
WO2022003799A1 (ja) * | 2020-06-29 | 2022-01-06 | オリンパス株式会社 | 光学ユニット、撮像ユニット、及び内視鏡 |
US11567288B2 (en) | 2017-07-07 | 2023-01-31 | Olympus Corporation | Endoscope apparatus |
JP7364435B2 (ja) | 2018-11-14 | 2023-10-18 | 旭化成エレクトロニクス株式会社 | カメラモジュール |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020136802A1 (ja) * | 2018-12-27 | 2020-07-02 | オリンパス株式会社 | 光学装置および内視鏡 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02301023A (ja) * | 1989-05-15 | 1990-12-13 | Seiko Epson Corp | レンズフォーカシングアクチュエータ |
JPH05196850A (ja) * | 1992-01-17 | 1993-08-06 | Canon Inc | レンズ駆動装置 |
WO2012137739A1 (ja) * | 2011-04-05 | 2012-10-11 | オリンパスメディカルシステムズ株式会社 | 撮像装置 |
JP2014002349A (ja) * | 2012-05-21 | 2014-01-09 | Sharp Corp | カメラモジュールおよびカメラモジュールを搭載した電子機器 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5031666B1 (ja) | 1969-10-06 | 1975-10-14 | ||
JPH05196805A (ja) * | 1992-01-20 | 1993-08-06 | Nippon Telegr & Teleph Corp <Ntt> | アレイ型レンズの製造方法 |
JP2006075289A (ja) * | 2004-09-08 | 2006-03-23 | Olympus Corp | 内視鏡 |
JP5031666B2 (ja) | 2008-05-28 | 2012-09-19 | キヤノン株式会社 | レンズ鏡筒及びそれを有する撮像装置 |
CN103384109A (zh) * | 2012-05-03 | 2013-11-06 | 鸿富锦精密工业(深圳)有限公司 | 音圈马达及使用该音圈马达的相机模组 |
-
2014
- 2014-12-18 CN CN201480084050.0A patent/CN107003494B/zh active Active
- 2014-12-18 DE DE112014006987.6T patent/DE112014006987B4/de not_active Expired - Fee Related
- 2014-12-18 JP JP2016564529A patent/JP6532481B2/ja active Active
- 2014-12-18 WO PCT/JP2014/083559 patent/WO2016098225A1/ja active Application Filing
-
2017
- 2017-05-26 US US15/606,444 patent/US10149606B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02301023A (ja) * | 1989-05-15 | 1990-12-13 | Seiko Epson Corp | レンズフォーカシングアクチュエータ |
JPH05196850A (ja) * | 1992-01-17 | 1993-08-06 | Canon Inc | レンズ駆動装置 |
WO2012137739A1 (ja) * | 2011-04-05 | 2012-10-11 | オリンパスメディカルシステムズ株式会社 | 撮像装置 |
JP2014002349A (ja) * | 2012-05-21 | 2014-01-09 | Sharp Corp | カメラモジュールおよびカメラモジュールを搭載した電子機器 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11567288B2 (en) | 2017-07-07 | 2023-01-31 | Olympus Corporation | Endoscope apparatus |
WO2019211935A1 (ja) * | 2018-05-01 | 2019-11-07 | オリンパス株式会社 | 光学ユニット |
US11953672B2 (en) | 2018-05-01 | 2024-04-09 | Olympus Corporation | Optical unit |
JP7364435B2 (ja) | 2018-11-14 | 2023-10-18 | 旭化成エレクトロニクス株式会社 | カメラモジュール |
US11984835B2 (en) | 2018-11-14 | 2024-05-14 | Asahi Kasei Microdevices Corporation | Camera module |
WO2022003799A1 (ja) * | 2020-06-29 | 2022-01-06 | オリンパス株式会社 | 光学ユニット、撮像ユニット、及び内視鏡 |
Also Published As
Publication number | Publication date |
---|---|
CN107003494B (zh) | 2020-06-12 |
JP6532481B2 (ja) | 2019-06-19 |
US10149606B2 (en) | 2018-12-11 |
CN107003494A (zh) | 2017-08-01 |
DE112014006987B4 (de) | 2018-12-20 |
US20170258303A1 (en) | 2017-09-14 |
JPWO2016098225A1 (ja) | 2017-09-28 |
DE112014006987T5 (de) | 2017-06-14 |
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