WO2011158462A1 - レンズ鏡筒、撮像装置および携帯端末装置 - Google Patents
レンズ鏡筒、撮像装置および携帯端末装置 Download PDFInfo
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- WO2011158462A1 WO2011158462A1 PCT/JP2011/003166 JP2011003166W WO2011158462A1 WO 2011158462 A1 WO2011158462 A1 WO 2011158462A1 JP 2011003166 W JP2011003166 W JP 2011003166W WO 2011158462 A1 WO2011158462 A1 WO 2011158462A1
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- WIPO (PCT)
- Prior art keywords
- lens
- adhesive
- holder
- imaging
- lenses
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/004—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having four lenses
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B33/00—Colour photography, other than mere exposure or projection of a colour film
Definitions
- the present invention relates to configurations of a lens barrel, an imaging device, a portable terminal device, and the like.
- the lens barrel mounted on a mobile terminal device such as a camera-equipped mobile phone or an information mobile terminal is required to be downsized.
- an imaging lens with high resolution is required due to the increase in size of the imaging element and the increase in thickness of pixels.
- the conventional lens barrel is provided with a plurality of lenses inserted in the lens holder, spacers disposed between the respective lenses, and the lens holder, and presses the lens on one end side in the optical axis direction to the other end
- the lens unit includes a pressing portion, and a lens pressing member pressing the lens on the other end side in the optical axis direction to one end side in the optical axis direction to fix each lens and the spacer to the lens barrel.
- the lens unit includes the rattle preventing member disposed between the pressing portion and the lens, or between the lens pressing member and the lens.
- the lens holder and the spacer are formed of aluminum or brass (e.g., Patent Document 1). This suppresses the decrease in optical performance due to environmental changes.
- the lens barrel according to the present invention includes a lens holder and an imaging lens composed of a plurality of three or more lenses inserted in the lens holder, and an optical axis between the lenses that affect curvature of field.
- a resin spacer having elasticity in the direction is provided, and the space between the lenses affecting the curvature of field is pressed to deform the resin spacer for positioning and fixing.
- the space between the lenses can be adjusted by elastically deforming the resin spacer in the optical axis direction by pressing the space between the lenses which easily affects the curvature of field. As a result, it is possible to correct the curvature of field and prevent a decrease in resolution.
- FIG. 1 is a side sectional view showing a lens barrel and an imaging device according to an embodiment of the present invention.
- FIG. 2 is a partially enlarged cross-sectional view for explaining the configuration in the vicinity of the resin spacer of the lens barrel in the embodiment of the present invention.
- FIG. 3 is a partially enlarged cross-sectional view for explaining the lens holding portion of the lens holder of the lens barrel in the embodiment of the present invention.
- FIG. 4 is a plan sectional view showing the positions of the second adhesive and the third adhesive of the imaging device in the embodiment of the present invention.
- FIG. 5A is a partially enlarged cross-sectional view showing an example of the state of adhesion by the third adhesive according to the embodiment of the present invention.
- FIG. 5B is a partially enlarged cross-sectional view showing another example of the state of adhesion with the third adhesive.
- FIG. 5C is a partially enlarged cross-sectional view showing still another example of the state of adhesion with the third adhesive.
- FIG. 6A is a plan view showing a portable terminal device according to an embodiment of the present invention.
- 6B is a plan view of the portable terminal device of FIG. 6A viewed from the back side.
- FIG. 1 is a side cross-sectional view showing a lens barrel 1 and an imaging device 7 according to an embodiment of the present invention.
- the lens barrel 1 is constituted by at least an imaging lens 2, a lens holder 3 and a resin spacer 6c.
- the imaging lens 2 is composed of three or more lenses. In the present embodiment, an example in which four lenses 2a to 2d are used will be described.
- the imaging lens 2 is inserted into the lens holder 3 to accommodate the imaging lens 2.
- the resin spacer 6c has elasticity in the optical axis direction, and is provided between the lenses of the imaging lens 2 that easily affect the curvature of field (in the present embodiment, between the lenses 2c and 2d).
- the lens barrel 1 is configured to be positioned and fixed by, for example, an adhesive agent in a state where the resin spacer 6c is deformed by pressing between the lenses which easily affects the curvature of field.
- the curvature of field means an aberration in which the surface in focus is curved. Further, the relationship between the amount of image collapse [ ⁇ m] / lens interval [ ⁇ m] is, for example, not less than the value of 0.6 [ ⁇ m] / lens interval [ ⁇ m], and preferably between the lenses that easily affect the curvature of field. It means between lenses which is equal to or greater than 1 [ ⁇ m] / lens interval [ ⁇ m].
- the imaging lens 2 of the lens barrel 1 is disposed in order from the subject side toward the imaging device 10, and an edge portion (for example, a plane orthogonal to the optical axis direction) It is composed of four lenses 2a to 2d having a planar portion).
- the lens 2 a side corresponds to the subject side
- the lens 2 d side corresponds to the imaging device 10 side.
- light shielding spacers 6a and 6b which are light shielding plates
- a resin spacer 6c which is a light shielding plate and has elasticity in the optical axis direction are provided.
- the lens barrel 1 has a cylindrical lens holder 3 for holding the imaging lens 2, the light shielding spacers 6a and 6b, and the resin spacer 6c on the inner wall.
- the resin spacer 6c is formed of, for example, a material such as polycarbonate (PC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyamide (PA) or polyacetal (POM).
- PC polycarbonate
- PET polyethylene terephthalate
- PBT polybutylene terephthalate
- PA polyamide
- POM polyacetal
- the bending elastic modulus of the resin spacer 6c has 2000 MPa to 3000 MPa. Due to this bending elastic modulus, for example, the distance between the lenses 2c and 2d is kept constant, and an imaging lens having high resolution can be obtained. The reason is that if the flexural modulus is too small at less than 2000 MPa, the lens may tilt, or the distance between the lenses may fluctuate due to vibration or impact.
- FIG. 2 is a partially enlarged cross-sectional view for explaining the configuration in the vicinity of the resin spacer of the lens barrel in the embodiment of the present invention.
- the resin spacer 6c is formed in a ring shape having a tapered portion whose inner wall diameter is larger on the image pickup device side than on the object side.
- the inclination angle of the tapered portion is set to 25 degrees to 50 degrees with respect to the optical axis. Thereby, the reflection of incident light on the tapered surface of the tapered portion can be suppressed, and the generation of ghost can be prevented. Further, by providing the resin spacer 6c with a tapered portion, it is possible to easily adjust the distance between the lenses 2c and 2d, for example, easily affecting the curvature of field. When the inclination angle of the tapered portion is too small, less than 25 degrees, the resin spacer 6c may be broken at the time of pressing.
- the inclination angle exceeds 50 degrees and is too large, it is difficult to make the thickness of the resin spacer 6c equal to or more than the specified thickness, so the design margin for the thickness of the resin spacer 6c decreases. Therefore, by setting the inclination angle of the tapered portion to 25 degrees to 50 degrees with respect to the optical axis, it is possible to obtain the resin spacer 6c which is excellent in reliability and easy in design.
- the outer peripheral end 6 d of the resin spacer 6 c on the imaging element side abuts on the flat portion 4 a of the outer peripheral end 4 of the lens 2 d and a gap between it and the inner wall 3 a of the lens holder 3 ⁇ is formed.
- the gap ⁇ is preferably 50 ⁇ m or more, and more preferably in the range of 100 ⁇ m to 500 ⁇ m. That is, if the gap ⁇ is less than 50 ⁇ m and too small, the outer peripheral end 6 d of the resin spacer 6 c easily contacts the inner wall 3 a of the lens holder 3, making it difficult to adjust the distance between the lenses.
- the mechanical strength of the resin spacer 6c can be maintained by setting the gap ⁇ to a predetermined value or more, and the enlargement of the lens barrel and the like can be prevented by setting it within the range of the predetermined value.
- the minimum diameter D of the resin spacer 6c in the portion in contact with the lens 2d on the image sensor 10 side shown in FIG. 1 is the maximum diameter d1 of the portion in contact with the lens 2c on the object side It is formed to be larger than the maximum diameter d2 of the portion in contact with the inner wall 3a of 3.
- the example in which the surfaces of the lenses 2a to 2d sandwiching the light shielding spacers 6a and 6b or the resin spacer 6c having elasticity is described as a plane is described. Absent.
- it may be formed of a convex surface or a curved surface.
- the resin spacer 6 c is easily elastically deformed in the radial direction along the curved surface, so adjustment of the distance between the lenses becomes even easier.
- a polyamide (PA) material having a small coefficient of friction is preferable as a material of the resin spacer 6c for adjusting the distance between the lenses.
- the imaging lens 2 of the present embodiment is composed of a plurality of, for example, four concave lenses and a convex lens, and the external dimensions (diameters) and the shapes of the respective lenses are different. Specifically, as shown in FIG. 1, the size (outer dimension) becomes larger as the lens 2d is located closer to the imaging surface (the imaging device 10). Therefore, the size of the lens 2a (hereinafter referred to as the front lens 21) located the farthest on the imaging surface is the smallest, and the size of the lens 2d (hereinafter referred to as the rear lens 22) located the closest to the imaging surface. Is the largest.
- the outer peripheral end 4 of the rear lens 22 is provided with a barrel insertion portion 41 and a lens pressing portion 42, and the outer peripheral end 4 of the rear lens 22 is The outer diameter is smaller than the outer diameter of the lens holding portion 32.
- the barrel insertion portion 41 is formed smaller than the inner diameter of the lens holding portion 32 of the lens holder 3 described later.
- the lens pressing portion 42 is formed continuously to the barrel insertion portion 41 and larger than the inner diameter of the lens holding portion 32.
- the lens pressing portion 42 has an opposing surface 42 a at a position facing away from the end surface 32 a of the lens holding portion 32 of the lens holder 3 (the end surface on the image sensor 10 side of the lens holder 3). .
- a part of the outer peripheral end of the imaging lens 2 (excluding the rear lens 22) is, for example, cut (D cut or notched) for reasons of processing and molding of the lens, etc. .
- the lens holder 3 includes an imaging lens 2 including a plurality of (four in the present embodiment) lenses 2a to 2d, and light shielding spacers 6a and 6b provided between the lenses 2a to 2d. And the resin spacer 6c having elasticity is accommodated.
- the lens supporting portion 31 supporting the outer peripheral end on one surface side (subject side) of the front lens 21 of the imaging lens 2 entirely or partially in the optical axis direction Formed at the side end).
- the lens holding portion 32 which entirely or partially opposes the outer peripheral end on the other surface side (image forming surface side) of the rear lens 22 of the imaging lens 2 is the other end of the lens holder 3 (image formation It is formed at the end on the surface side).
- the lens holding portion 32 of the lens holder 3 described above will be described below with reference to FIG.
- FIG. 3 is a partially enlarged cross-sectional view for explaining the lens holding portion of the lens holder of the lens barrel in the embodiment of the present invention.
- the outer peripheral surface of the tip end portion of the lens holding portion 32 of the lens holder 3 is formed in a tapered shape so as to decrease in diameter toward the tip end side.
- the inner peripheral surface of the tip end portion of the lens holding portion 32 of the lens holder 3 is formed in, for example, an R shape so as to have a larger diameter toward the tip end side.
- a plurality of slits, holes, irregularities, or the like are formed on the entire outer surface of the distal end portion of the tapered lens holding portion 32 discretely or at predetermined intervals.
- an opening 33 serving as a stop of the imaging lens 2 is provided in the upper portion (subject side) of the lens holder 3.
- a male screw 34 is formed for screwing with a holder 8 described later.
- the lens barrel 1 can Configured At this time, as shown in the right half of FIG. 1, a cut portion formed at the outer peripheral end (edge portion) of the imaging lens 2 (except for the rear lens 22), of the imaging lens 2 (except for the rear lens 22). A gap (space portion) is formed in part between the outer peripheral end and the inner peripheral surface of the lens holder 3.
- the light shielding spacers 6a and 6b and the resin spacer 6c are interposed between the outer peripheral end portions of the respective lenses 2a to 2d, but are cut according to the cuts (D cuts or notches) of the lenses 2a to 2d.
- the upper surface of the outer peripheral end of the front lens 21 (lens 2 a) positioned closest to the opening 33 of the lens holder 3 is the lens of the lens holder 3
- the outer surface of the central portion except for the outer peripheral end of the front lens 21 is in contact with the lower surface of the support portion 31 and stored from the lower surface of the lens holder 3 with a predetermined distance of more than 0 ⁇ m and 50 ⁇ m or less.
- the barrel insertion portion 41 of the rear lens 22 (lens 2 d) located closest to the image forming surface is inserted into the lens holding portion 32 of the lens holder 3 and the rear lens 22 is attached to the lens holder 3 .
- the opposing surface 42 a of the lens pressing portion 42 of the rear lens 22 larger than the inner diameter of the lens holding portion 32 continuing from the barrel insertion portion 41 It is in a spaced position facing the end face 32a. Therefore, a recess is formed by the tip of the lens holder 3 and the outer peripheral end of the rear lens 22 which are separated.
- the depressed portion is formed in a concave and annular shape by the lens holding portion 32 of the lens holder 3, the barrel insertion portion 41 of the rear lens 22, and the lens pressing portion 42.
- a predetermined adhesive hereinafter referred to as a first adhesive
- the corner E formed by the barrel insertion portion 41 of the rear lens 22 and the opposing surface 42a of the lens pressing portion 42 is an imaging ray. It is provided at a position not in contact with the lens optical path of (maximum image height). Thereby, since the light beam of the imaging light beam (maximum image height) does not pass through the corner portion E, for example, the imaging of the light beam due to scattering or the like at the corner portion E is not inhibited.
- the front lens 21, the light shielding spacer 6a, the lens 2b, the light shielding spacer 6b, the resin spacer 6c having elasticity, and the rear lens Insert 22 each.
- the inner wall diameter of the lens holder 3 and the outer peripheral diameters of the lenses 2a to 2d of the imaging lens 2 and the outer peripheral end diameter of the resin spacer 6c on the object side are fitted by clearance fitting.
- the upper surface of the outer peripheral end of the front lens 21 located closest to the opening of the lens holder 3 abuts on the lower surface of the lens support 31 of the lens holder 3, and the central portion of the front lens 21 excluding the outer peripheral end
- the outer surface is housed in the lens holder 3 while maintaining a distance of, for example, about 20 ⁇ m from the lower surface of the lens holder 3.
- the lens pressing portion 42 of the rear lens 22 located closest to the image forming surface is pressed in the optical axis direction from the rear lens 22 side, and the barrel insertion portion 41 of the rear lens 22 is inserted into the lens holding portion 32 .
- the rear lens 22 is pressed and inserted to elastically deform the resin spacer 6c having elasticity so that the lens holder 3 and the rear lens 22 are at a position where the curvature of field is suppressed by the first adhesive. Adhesively fix.
- the light shielding spacer or the light shielding spacer is set such that the distance between the end surface 32a of the lens holding portion 32 and the opposing surface 42a of the lens pressing portion 42 is, for example, 30 ⁇ m or more and 1 mm or less, more preferably 50 ⁇ m or more and 500 ⁇ m or less.
- the lens pressing portion 42 of the rear lens 22 is mechanically pressed by a jig or the like. Then, the first adhesive 5 is inserted into a portion where the end face 32 a of the lens holding portion 32 and the lens pressing portion 42 are separated.
- the side surface of the portion of the end 32a of the lens holding portion 32, the opposing surface 42a of the lens pressing portion 42, and the barrel insertion portion 41 not inserted into the lens holding portion 32 is adhesively fixed by the first adhesive 5.
- the first adhesive 5 when the amount of the first adhesive 5 is large, the first adhesive 5 reaches the outside of the outer peripheral surface of the tip end portion of the lens holding portion 32, and the bonding area is increased. Further, when the amount of the first adhesive 5 is small, the shape of the first adhesive 5 at both ends of the separated portion is formed into a fillet shape. Thereby, even when the first adhesive 5 is large or small, at least the end face 32 a of the lens holding portion 32 and the opposing surface 42 a of the lens pressing portion 42 are adhered and fixed by the first adhesive 5.
- the first adhesive 5 is made to intervene in the recessed portion between the end surface 32 a of the lens holding portion 32 and the opposing surface 42 a of the lens pressing portion 42 to adhere and fix. Therefore, it is possible to prevent the first adhesive 5 from invading the inside of the lens holder 3 into which the rear lens 22 is fitted (the side where the lenses other than the rear lens 22 are stored). As a result, it is possible to prevent the first adhesive 5 from adhering to the surface of the rear lens 22 (the surface through which incident light passes).
- the imaging device 7 includes at least the lens barrel 1 (the imaging lens 2 and the lens holder 3), the housing 9, the imaging device 10, and the imaging device 10 according to the present embodiment. It comprises a substrate 11, a glass plate 12 covering the imaging device 10, and an infrared cut filter 13.
- the housing 9 is provided with a cylindrical holder 8 that accommodates the imaging lens 2 via the lens holder 3.
- the imaging element 10 is disposed at a predetermined distance from the rear lens 22 and has a light receiving unit at the center.
- the housing 9 has a holder 8 for holding the lens holder 3 and a support portion 14 for supporting the holder 8 provided on the holder 8 side.
- the holder 8 has a tubular shape with a female screw 81 formed on the inner surface, and is fixed to the lens holder 3 by screwing the female screw 81 with the male screw 34 of the lens holder 3.
- a positioning portion 14 a and a protrusion 14 b are formed in the lower portion of the support portion 14.
- the positioning portion 14 a of the support portion 14 mainly positions the lens holder 3 and the imaging lens 2 held by the holder 8 in the vertical direction.
- the protrusion 14 b of the support 14 is provided to project (downward) toward the imaging device 10 (or the substrate 11).
- the positioning portion 14a of the support portion 14 is a planar shape having a predetermined area, and has a rectangular outer periphery in a plan view.
- the positioning unit 14 a of the support unit 14 positions the imaging lens 2 with respect to the imaging device 10 near the outer peripheral end of the light receiving unit of the imaging device 10.
- the positioning portion 14a of the support portion 14 is brought into contact with the surface (upper surface) of the glass plate 12 positioned on the upper side of the imaging device 10, and a predetermined adhesive (hereinafter referred to as a second adhesive)
- the positioning portion 14 a of the support portion 14 and the glass plate 12 are bonded and fixed via the reference numeral 15.
- the second adhesive 15 for example, a thermosetting or ultraviolet curing adhesive of which the main component is an acrylic resin or an epoxy resin, preferably, a thermosetting epoxy adhesive can be used.
- FIG. 4 is a plan sectional view showing the positions of the second adhesive and the third adhesive of the imaging device in the embodiment of the present invention.
- the second adhesive 15 is applied to the lower surface of the support portion 14, for example, at positions near four corners, and the support portion 14 and the substrate 11 provided on the holder 8 side shown in FIG. It adheres and adheres to the glass plate 12 mounted in.
- the protrusion 14 b of the support 14 is provided at a position outside the outer peripheral edge of the imaging device 10 so as to project toward the substrate 11 so as to cover the outer periphery of the imaging device 10.
- the lower surface of the protrusion 14 b of the support portion 14 is formed in a square shape (square cylinder shape), and is provided so as to protrude toward the substrate 11 at a position outside the outer peripheral edge of the glass plate 12.
- the protrusion 14 b of the support 14 is fixed to the surface (upper surface) of the substrate 11 through a predetermined adhesive (hereinafter referred to as a third adhesive) 16.
- a predetermined adhesive hereinafter referred to as a third adhesive 16.
- an adhesive such as silicone resin, allyl ester, acrylic resin, epoxy resin, polyimide, urethane resin or the like, preferably a silicone modified polymer elastic adhesive or the like. It can be used.
- FIG. 5A is a partially enlarged cross-sectional view showing an example of the state of adhesion by the third adhesive according to the embodiment of the present invention.
- the protrusions 14 b of the support 14 are spaced apart from the surface of the substrate 11 by a predetermined distance S, and are not in direct contact with the surface of the substrate 11.
- the distance S between the tip of the protrusion 14 b and the surface of the substrate 11 is set, for example, in the range of 0.1 mm to 0.5 mm, preferably in the range of 0.2 mm to 0.3 mm.
- the protrusion 14 b and the substrate 11 are adhered and fixed by the third adhesive 16 interposed between the protrusion 14 b of the support 14 and the substrate 11.
- the 3rd adhesive agent 16 spreads to the outer peripheral surface side of the board
- the third adhesive 16 is cured to cure the substrate 11 and the substrate.
- the protrusion 14 b is fixed.
- the thickness of the third adhesive 16 before bonding which is applied to a predetermined thickness, corresponds to the protrusion 14 b and the substrate when the positioning portion 14 a is brought into contact with the glass plate 12 provided with the imaging device 10. It is applied thicker than the separation distance S with the surface 11. Therefore, when the positioning portion 14 a of the support portion 14 is brought into contact with the glass plate 12 provided with the imaging device 10, the protrusion 14 b of the support portion 14 bites into the third adhesive 16.
- the fact that the protruding portion 14 b “digs into” the third adhesive 16 means that, as shown in FIG. 5A, the tip of the protruding portion 14 b is closer than the top of the third adhesive 16 of a predetermined thickness applied to the substrate 11. It says to enter into the lower side (substrate 11 side).
- FIG. 5A illustrates an example in which a part of the tip of the protrusion 14 b of the support 14 bites into the third adhesive 16
- the present invention is not limited to this.
- the entire end or the other part of the tip of the protrusion 14b may be adhered and fixed in a state of being bitten into the third adhesive 16.
- FIG. 5B is a partially enlarged cross-sectional view showing another example of the state of adhesion with the third adhesive.
- FIG. 5C is a partially enlarged cross-sectional view showing still another example of the state of adhesion with the third adhesive.
- a portion of the protrusion 14b of the support 14 on the side of the glass plate 12 where the imaging device 10 is provided may bite into the third adhesive 16.
- the state which the part of the outer peripheral side (opposite side with the glass plate 12 side in which the image pick-up element 10 was provided) of the projection part 14b of the support part 14 bites into the 3rd adhesive agent 16 may be sufficient.
- the viscosity of the third adhesive 16 is set higher than that of the second adhesive 15, and the thickness of the third adhesive 16 is set larger than that of the second adhesive 15.
- the thickness of the third adhesive 16 is at least 0.3 mm, which exceeds 0.2 mm.
- the thickness of the second adhesive 15 is set to 0.01 mm, which is smaller than the thickness 0.2 mm of the third adhesive 16.
- the thickness (height) of the third adhesive 16 is such that the third adhesive 16 does not scatter and adhere to the imaging region of the imaging device 10 in a state in which the projection 14 b of the support 14 and the substrate 11 are fixed.
- the height is set lower than the upper surface of the glass plate 12.
- the third adhesive 16 is applied on the substrate 11 so as to cover (enclose) the outer peripheral surface of the imaging device 10. That is, the imaging device 10 and the glass plate 12 are configured in a square shape in plan view, and the third adhesive 16 is formed in a square shape so as to continuously connect the sides of the square glass plate 12 on which the imaging device 10 is provided. Is applied to the substrate 11 so as to surround it. At this time, the third adhesive 16 is applied to the substrate 11 so as not to completely surround the glass plate 12 provided with the imaging device 10 but to leave a gap in a part thereof.
- a communication portion 18 is formed to communicate with each other.
- the communication portion 18 can discharge the heat generated in the vicinity of the imaging element 10 inside the third adhesive 16 and the air that expands due to the heat to the outside.
- a part of the third adhesive 16 having a high viscosity is interposed in a state of being sandwiched between the projection 14 b of the support 14 provided on the holder 8 side and the glass plate 12.
- the positional deviation of the holder 8 can be effectively prevented.
- the imaging element 10 is adhesively fixed to the lower surface side of the glass plate 12, and the lower surface of the glass plate 12 is fixed to the substrate 11 via the connection portion 17.
- the infrared cut filter 13 is fixed to a support portion 14 provided on the holder 8 side at a position between the rear lens 22 and the glass plate 12. At this time, the infrared cut filter 13 is fixed to the support 14 at a position inside the lower portion 14 c of the support 14.
- a mobile terminal device 19 including the imaging device 7 described above will be described with reference to FIGS. 6A and 6B.
- a mobile phone with a camera will be described as an example of the mobile terminal device 19.
- FIG. 6A is a plan view showing a portable terminal device according to an embodiment of the present invention.
- 6B is a plan view of the portable terminal device of FIG. 6A viewed from the back side.
- the mobile terminal device 19 includes at least a main body case 20, a display 23 mounted on the main body case 20, an operation unit 24, and an imaging device 7. There is.
- the main body case 20 includes, for example, two foldable rectangular plate-like members 20a and 20b, and short sides of the plate-like members 20a and 20b are connected by, for example, a hinge-like connecting portion. And it is comprised so that it can be bend
- the main body case 20 is folded so that the surface on which the display 23 is disposed and the surface on which the operation unit 24 is disposed are in close proximity to each other.
- the display 23 is, for example, a rectangular liquid crystal screen, and displays information related to the operation of the mobile phone.
- the operation unit 24 includes circular and elliptical buttons, and the cellular phone is operated by pressing the button.
- the imaging device 7 has the configuration described in the above embodiment, and as shown in FIG. 6B, the opening of the lens holder 3 is provided on the surface opposite to the surface on which the operation portion 24 of the main body case 20 is disposed.
- the 33 side (the front lens 21) is disposed in the main body case 20.
- the lens barrel 1 is the outer peripheral end of the rear lens 22 located closest to the imaging surface.
- the portion 4 is provided with a barrel insertion portion 41 having an outer diameter equal to or smaller than the inner diameter of the lens holding portion 32. Therefore, the barrel insertion portion 41 of the rear lens 22 can be inserted (fitted) into the lens holding portion 32 coaxially with the lens holder 3. As a result, the lens holder 3 only needs to conform to the size (size) of the barrel insertion portion 41 instead of the maximum outer size of the rear lens 22, so the entire outer size can be reduced.
- the external dimensions of the lens holder 3 can be made smaller (smaller in diameter) as the external dimensions of the barrel insertion portion 41 are smaller than the maximum external dimensions of the rear lens 22.
- the imaging device 7 that houses the lens barrel 1 or the portable terminal device 19 that houses the imaging device 7 can be miniaturized.
- the lens barrel 1 is continued to the barrel insertion portion 41, is larger than the inner diameter of the lens holding portion 32, and is at the position separated from the end surface 32a of the lens holding portion 32. It has the lens pressing part 42 which it has. Therefore, when the barrel holder 41 of the rear lens 22 is inserted into the lens holder 32 when the lens holder 3 and the rear lens 22 are bonded and fixed, the end 32a of the lens holder 32 and the end 32a of the lens holder 32 A recessed portion with the lens pressing portion 42 at the facing position separated is formed.
- the imaging lens 2 (lens other than the rear lens 22) housed inside the lens holder 3 or the outer side of the rear lens 22 located closest to the imaging surface It is difficult for the first adhesive 5 to adhere to the surface.
- the first adhesive 5 for bonding the lens holder 3 and the rear lens 22 is prevented from adhering to the surface of the imaging lens 2 (in which incident light passes), and ghosting due to the lens surface or It is possible to suppress the reduction in resolution due to the optical axis deviation of the lens.
- the upper surface of the outer peripheral end of the front lens 21 located closest to the opening 33 of the lens holder 3 is the lens support of the lens holder 3 31 is in contact with the lower surface.
- the lens outer surface of the central portion excluding the outer peripheral end of the front lens 21 is accommodated in the lens holder 3 in a state where a predetermined distance of more than 0 ⁇ m and 50 ⁇ m or less from the lower surface of the lens holder 3 is maintained. Therefore, unnecessary light from the opening passing through the outside of the effective diameter of the front lens 21 can be prevented from entering the imaging element 10, and the generation of ghost can be suppressed.
- the lens can be cured in several seconds while being fixed at a predetermined position by a jig or the like.
- the time for assembling the lens barrel 1 and the like can be shortened, and the assembling accuracy of the lens can be improved.
- a soft adhesive having a low hardness for example, an acrylic adhesive
- the hardness of the adhesive is too low, the adhesive may break due to impact or the like, so it is preferable to appropriately select an adhesive with an optimum hardness.
- the lens pressing portion 42 is adhesively fixed after being pressed in the optical axis direction on the lens holder 3 side from the rear lens 22 side, the positional accuracy in the optical axis direction of the imaging lens 2 is improved. Further, since the lens pressing portion 42 of the rear lens 22 is pressed toward the lens holder 3 by a mechanical method such as a jig, it is possible to prevent damage to the surface of the rear lens 22 in advance.
- the distance between the end face 32a of the lens holding portion 32 and the opposing surface 42a of the lens pressing portion 42 is 30 ⁇ m to 1 mm, preferably 50 ⁇ m to 500 ⁇ m. It is set to. Therefore, for example, when the amount of the first adhesive 5 is large, the first adhesive 5 reaches the outside of the tip of the outer surface of the lens holding portion 32, and the adhesion area is increased. On the other hand, when the amount of the first adhesive 5 is small, the shape of the first adhesive 5 at both ends of the separated portion becomes a fillet shape. Thus, the bonding strength between the lens holder 3 and the imaging lens 2 can be improved and stabilized, and the height of the lens barrel can be reduced.
- the surface such as the end face 32a of the lens holding portion 32 to which the first adhesive 5 adheres or the opposing surface 42a of the lens pressing portion 42 may be roughened. Thereby, the bonding area can be increased, and the bonding strength can be further enhanced.
- the imaging lens 2 can contribute to downsizing and wide angle of an imaging device by sequentially increasing the diameter of each of the lenses 2a to 2d in the direction of the imaging surface.
- the outer peripheral surface of the tip end portion of the lens holding portion 32 of the lens holder 3 is formed in a tapered shape.
- the rise of the first adhesive 5 in the outer diameter direction of the lens holder 3 can be suppressed.
- the first adhesive 5 can be easily inserted into a portion where the end face 32 a of the lens holding portion 32 and the opposing surface 42 a of the lens pressing portion 42 are separated.
- the bonding area can be increased by the tapered shape as compared with the straight shape, the bonding strength can be increased.
- the inner peripheral surface of the tip end portion of the lens holding portion 32 of the lens holder 3 is formed in an R shape. Therefore, the first adhesive 5 intervened in the portion separated from the end face 32a of the lens holding portion 32 and the opposing surface 42a of the lens pressing portion 42 is the R shape of the lens holding portion 32 of the lens holder 3 and the barrel insertion portion 41. Inserted between As a result, the bonding area can be increased to increase the bonding strength.
- the distal end portion of the lens holding portion 32 of the lens holder 3 is provided with a plurality of slits, holes, irregularities and the like.
- the bonding area with the rear lens 22 can be increased, and the bonding strength can be increased.
- the imaging device 7 houses the lens barrel 1 of the above embodiment, all the effects obtained by the lens barrel 1 can be obtained. Furthermore, other than that, for example, the first adhesive 5 is inserted in a portion where the end face 32a of the lens holding portion 32 and the opposing surface 42a of the lens pressing portion 42 are separated, and the first adhesive in the outer diameter direction of the lens holder 3 Since the buildup of 5 can be suppressed, the contact between the outer surface of the first adhesive 5 and the mechanical component facing it can be prevented. In addition, for example, the external dimensions of the lens holder 3 of the lens barrel 1 can be reduced, so that the size of the housing 9 of the imaging device 7 can be reduced (miniaturized).
- the mobile terminal device 19 since the mobile terminal device 19 includes the imaging device 7 of the above-described embodiment, all effects obtained by the lens barrel 1 and the imaging device 7 can be obtained. Furthermore, in addition to that, miniaturization and weight reduction of the entire portable terminal device 19 can be realized.
- the lens barrel, the imaging device, and the portable terminal device in the present invention are not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.
- the configuration in which the imaging lens 2 includes four lenses is described as an example, but the present invention is not limited to this. For example, it may be configured by two lenses.
- the lens holder 3 has been described as an example having the male screw 34 screwed with the female screw 81 on the imaging device 7 side in order to be stored in the imaging device 7.
- the present invention is not limited thereto.
- the lens holder 3 may not have the male screw 34.
- a tapered shape, or a configuration in which a plurality of slits, holes or irregularities are not provided or an R shape is not provided on the inner peripheral surface of the tip end of the lens holding portion 32 It is good also as composition.
- the rear lens 22 when the lens holder 3 and the rear lens 22 are bonded, the rear lens 22 is pressed against the lens holder 3 so that the barrel insertion portion 41 of the rear lens 22 is the lens holding portion 32 of the lens holder 3.
- the invention is not limited thereto.
- the rear lens 22 and the lens holder 3 may be bonded and fixed together with suction of the rear lens 22.
- the rear lens 22 is sucked. Can be adhesively fixed.
- the ultraviolet curing adhesive was described as an example of the first adhesive 5 in the present embodiment, the present invention is not limited to this.
- an adhesive obtained by adding a component that is cured by heat, visible light, moisture, anaerobic, or the like to an ultraviolet-curable adhesive may be used.
- the uncured portion can be complementarily cured by applying heat or the like, and the first adhesive can be completely cured.
- the present invention can be applied to technical fields such as a lens barrel, an imaging device, a portable terminal device, and the like for which it is required to suppress the occurrence of curvature of field and the decrease in resolution.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Studio Devices (AREA)
Abstract
Description
図1は、本発明の実施の形態におけるレンズ鏡筒1および撮像装置7を示す側面断面図である。
2 撮像レンズ
2a,2b,2c,2d レンズ
3 レンズホルダ
3a 内壁
4,6d 外周端部
4a 平面部
5 第1接着剤
6a,6b 遮光スペーサ
6c 樹脂スペーサ
7 撮像装置
8 ホルダ
9 筐体
10 撮像素子
11 基板
12 ガラス板
13 赤外線カットフィルタ
14 支持部
14a 位置決め部
14b 突起部
14c 下部
15 第2接着剤
16 第3接着剤
17 接続部
18 連通部
19 携帯端末装置
20 本体ケース
20a,20b 板状体
21 前方レンズ
22 後方レンズ
23 ディスプレイ
24 操作部
31 レンズ支持部
32 レンズ保持部
32a 端面
33 開口部
34 雄ねじ
41 バレル挿入部
42 レンズ押圧部
42a 対向面
81 雌ねじ
Claims (7)
- レンズホルダと、前記レンズホルダに挿嵌された3枚以上の複数のレンズで構成された撮像レンズと、を備え、像面湾曲に影響を与える前記レンズ間に、光軸方向に弾性を有する樹脂スペーサを設け、前記像面湾曲に影響を与える前記レンズ間を押圧して、前記樹脂スペーサを変形させて位置決め固定されていることを特徴とするレンズ鏡筒。
- 前記樹脂スペーサの曲げ弾性率が、2000MPa~3000MPaであることを特徴とする請求項1に記載のレンズ鏡筒。
- 前記樹脂スペーサは、被写体側の内壁径より撮像素子側の前記内壁径が大きいテーパ形状部を有するリング形状であることを特徴とする請求項1に記載のレンズ鏡筒。
- 前記樹脂スペーサの前記撮像素子側の外周端部と、前記レンズホルダの内壁との間に隙間を有することを特徴とする請求項3に記載のレンズ鏡筒。
- 前記樹脂スペーサは、前記撮像素子側の前記レンズ面に当接する部分の最小径が前記被写体側の前記レンズ面に当接する部分の最大径より大きいことを特徴とする請求項3に記載のレンズ鏡筒。
- 請求項1から請求項5のいずれか1項に記載のレンズ鏡筒と、前記レンズ鏡筒を保持するホルダと、前記ホルダに保持された前記レンズ鏡筒の光軸に撮像中心を対応させて配置される撮像素子と、を備えることを特徴とする撮像装置。
- 請求項6に記載の撮像装置を備えることを特徴とする携帯端末装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/391,869 US20120162795A1 (en) | 2010-06-16 | 2011-06-06 | Lens barrel, imaging device and mobile terminal device |
KR1020127006073A KR20130085936A (ko) | 2010-06-16 | 2011-06-06 | 렌즈 경통, 촬상 장치 및 휴대 단말 장치 |
CN2011800037829A CN102483504A (zh) | 2010-06-16 | 2011-06-06 | 透镜镜筒、摄像装置和移动终端装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010136971A JP2012002979A (ja) | 2010-06-16 | 2010-06-16 | レンズ鏡筒、撮像装置および携帯端末装置 |
JP2010-136971 | 2010-06-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011158462A1 true WO2011158462A1 (ja) | 2011-12-22 |
Family
ID=45347878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/003166 WO2011158462A1 (ja) | 2010-06-16 | 2011-06-06 | レンズ鏡筒、撮像装置および携帯端末装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120162795A1 (ja) |
JP (1) | JP2012002979A (ja) |
KR (1) | KR20130085936A (ja) |
CN (1) | CN102483504A (ja) |
WO (1) | WO2011158462A1 (ja) |
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CN104603660A (zh) * | 2012-08-31 | 2015-05-06 | 夏普株式会社 | 透镜驱动装置和摄像机组件 |
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KR101988602B1 (ko) * | 2017-09-14 | 2019-06-13 | 주식회사 나오텍 | Tof용 렌즈조립체 |
CN208026940U (zh) * | 2018-02-09 | 2018-10-30 | 瑞声科技(新加坡)有限公司 | 一种镜头模组 |
WO2019206255A1 (zh) * | 2018-04-28 | 2019-10-31 | 宁波舜宇光电信息有限公司 | 光学镜头、摄像模组及其组装方法 |
JP2019211682A (ja) * | 2018-06-07 | 2019-12-12 | 日本電産コパル株式会社 | レンズ組立体、撮像装置、及び電子機器 |
CN111198424A (zh) * | 2018-11-16 | 2020-05-26 | 三营超精密光电(晋城)有限公司 | 垫圈及采用该垫圈的镜头 |
CN111221200B (zh) * | 2018-11-27 | 2022-01-07 | 三营超精密光电(晋城)有限公司 | 固定环、镜头模组及电子装置 |
JP7172553B2 (ja) * | 2018-12-18 | 2022-11-16 | 株式会社デンソー | レンズモジュール及び車両用撮像装置 |
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CN210270326U (zh) * | 2019-08-15 | 2020-04-07 | 瑞声通讯科技(常州)有限公司 | 镜头模组 |
CN210270327U (zh) * | 2019-08-15 | 2020-04-07 | 瑞声通讯科技(常州)有限公司 | 镜头模组 |
JP2021162730A (ja) * | 2020-03-31 | 2021-10-11 | パナソニックIpマネジメント株式会社 | 撮像装置および車両用視認装置 |
WO2022038651A1 (ja) * | 2020-08-17 | 2022-02-24 | シャープNecディスプレイソリューションズ株式会社 | 光源装置およびプロジェクタ |
KR102596254B1 (ko) * | 2021-01-08 | 2023-11-01 | 삼성전기주식회사 | 렌즈 조립체 |
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- 2011-06-06 KR KR1020127006073A patent/KR20130085936A/ko not_active Application Discontinuation
- 2011-06-06 CN CN2011800037829A patent/CN102483504A/zh active Pending
- 2011-06-06 WO PCT/JP2011/003166 patent/WO2011158462A1/ja active Application Filing
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US10634866B2 (en) | 2018-05-11 | 2020-04-28 | Rays Optics Inc. | Lens and manufacturing method thereof |
Also Published As
Publication number | Publication date |
---|---|
US20120162795A1 (en) | 2012-06-28 |
CN102483504A (zh) | 2012-05-30 |
KR20130085936A (ko) | 2013-07-30 |
JP2012002979A (ja) | 2012-01-05 |
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