WO2013047653A1 - 撮像レンズユニット及び撮像レンズユニットの製造方法 - Google Patents
撮像レンズユニット及び撮像レンズユニットの製造方法 Download PDFInfo
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- WO2013047653A1 WO2013047653A1 PCT/JP2012/074878 JP2012074878W WO2013047653A1 WO 2013047653 A1 WO2013047653 A1 WO 2013047653A1 JP 2012074878 W JP2012074878 W JP 2012074878W WO 2013047653 A1 WO2013047653 A1 WO 2013047653A1
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- WIPO (PCT)
- Prior art keywords
- lens
- mold
- alignment
- imaging lens
- optical
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/003—Alignment of optical elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
-
- 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
- G02B13/0025—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 one lens only
-
- 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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14131—Positioning or centering articles in the mould using positioning or centering means forming part of the insert
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14139—Positioning or centering articles in the mould positioning inserts having a part extending into a positioning cavity outside the mould cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00038—Production of contact lenses
- B29D11/00125—Auxiliary operations, e.g. removing oxygen from the mould, conveying moulds from a storage to the production line in an inert atmosphere
- B29D11/00192—Demoulding, e.g. separating lenses from mould halves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
-
- 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
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
Definitions
- the present invention relates to an imaging lens unit in which a lens is incorporated in a holder, and a manufacturing method of the imaging lens unit.
- An imaging lens unit incorporated in a cellular phone or the like has a structure in which a periphery of an optical lens for image formation is held by a holder.
- the assembly of the optical lens to the holder is very precise in positioning accuracy, and is usually performed by an automatic assembly system incorporating an image recognition technique.
- an automatic assembly system incorporating an image recognition technique is very expensive and requires a very large site because the production line is divided into the process of inserting the lens into the holder and the process of bonding the lens to the holder.
- the change of equipment performed every time the type is changed becomes very large, and a lot of man-hours are required.
- a lens and a diaphragm are positioned and set in advance on the basis of the outer edge of the lens, and then a holder is formed around the lens by injection molding.
- a technique for collectively assembling an imaging lens unit is known (see Patent Document 1).
- An object of the present invention is to provide an imaging lens unit in which a holder member and a lens are positioned with high accuracy regardless of the outer edge shape of the lens.
- an imaging lens unit includes a lens having a first optical surface and a second optical surface formed on the opposite side of the first optical surface, and first and second optics.
- An imaging lens unit including a holder member integrally molded so as to hold the lens inside with the surface exposed, wherein the lens is placed in a mold having a molding space for molding the holder member.
- the lens has an alignment portion that positions the lens with respect to the mold, and the alignment portion is provided outside one of the first and second optical surfaces. At least a part of the inside of the mating portion is exposed from the holder member.
- each positioning portion provided in the mold may be a positioning portion that also serves as a support portion
- the holder member is molded in a state where the lens is aligned by contact with the portion.
- the clearance of the positioning portion between the lens and the mold that is, the gap is substantially zero, all the positioning portions are exposed.
- the clearance is large and the lens and the mold are loose, only the part in contact is exposed. As described above, the positioning accuracy between the lens and the holder member can be easily confirmed based on the exposed portion.
- the inside of the alignment unit means that on the optical surface side when a line perpendicular to the line passing through the center of the alignment unit and connecting the center of the optical surface and the center of the alignment unit is drawn in the alignment unit. It is a region (see FIG. 3C).
- the lens since the lens has an alignment portion, the lens is positioned with high accuracy with respect to the mold when the holder member is molded, and the holder member and the lens are positioned with high accuracy. Become.
- the lens can be positioned with respect to the mold using an alignment portion provided outside the optical surface, heat and pressure generated by the mold and resin during molding of the holder member are applied to the optical surface. The effect of this can be mitigated. Therefore, it is possible to prevent deterioration such as distortion on the optical surface of the lens when the holder member is molded. Since the lens is positioned with respect to the mold inside the alignment portion, the opening of the imaging lens unit can be made smaller than when the lens is positioned outside the alignment portion.
- the alignment portion is formed integrally with a part of either the first or second optical surface of the lens. In this case, the alignment portion can be easily formed together with the lens.
- the alignment portion has at least one of a convex shape and a concave shape with respect to the surface other than the first or second optical surface of the lens.
- the alignment in the direction perpendicular to the lens optical axis can be facilitated by the concave shape or the convex shape.
- the alignment portion has a step with respect to the flat surface of the outer peripheral portion extending from the outer edge of the first or second optical surface. In this case, alignment in the direction perpendicular to the lens optical axis can be ensured by the step between the flat surface of the outer peripheral portion extending from the outer edge of the first or second optical surface and the alignment portion.
- At least two alignment portions are arranged around at least one of the first and second optical surfaces, and the alignment portions are separated.
- the alignment portion can be formed only at a necessary portion. For example, when the alignment portion has a convex shape, the material of the alignment portion can be reduced.
- the shape of the alignment portion is any one of a cylindrical shape, a quadrangular prism shape, and a shape having a slope with respect to the lens optical axis.
- the slope includes not only a flat surface but also a curved surface.
- At least one alignment unit is arranged around at least one of the first and second optical surfaces so as to surround the optical surface. In this case, the contact area between the alignment portion and the mold is increased, and the lens can be stably positioned with respect to the mold.
- the shape of the alignment portion is any one of a shape having a surface parallel to the lens optical axis and a shape having a slope with respect to the lens optical axis.
- the optical surface can be prevented from being damaged by making the alignment portion higher than the optical surface.
- the lens is made of resin.
- the alignment portion can be easily formed as the lens body is molded.
- the lens includes a glass substrate and a resin portion formed on at least one surface of the glass substrate, and the alignment portion is formed in the resin portion.
- the alignment portion can be formed with the molding of the resin portion.
- the lens has a diaphragm on at least one of the surface and the inside of the lens. In this case, it is possible to prevent light from entering the outer peripheral portion of the lens including the alignment portion and the like. Thereby, it is possible to prevent stray light from being generated by light incident on the outer peripheral portion of the lens.
- the lens is obtained by dicing a wafer lens into individual pieces. In this case, even if the outer edge shape of the separated lens and the first and second optical surfaces are displaced, the lens can be accurately positioned on the holder member.
- a method of manufacturing an imaging lens unit includes a lens having a first optical surface and a second optical surface formed on the opposite side of the first optical surface, and first and first lenses. And a holder member integrally molded so as to hold the lens inside with the optical surface exposed.
- a molding die for forming the holder member is a first mold.
- the lens includes a mold and a second mold, and the lens includes an alignment portion that is provided outside one of the first and second optical surfaces and positions the lens with respect to the first or second mold.
- One of the first and second molds has a positioning portion that faces the positioning portion and positions the lens, and at least a part of the positioning portion contacts an inner surface of the positioning portion of the lens.
- the lens since the lens has the alignment portion, the lens can be positioned with high accuracy with respect to the mold when the holder member is molded.
- the lens since the lens can be positioned with respect to the mold using the alignment portion provided outside the optical surface, the heat and pressure generated during the molding of the holder member are alleviated by the positioning portion, and the holder member is molded. It is possible to prevent deterioration such as distortion on the optical surface of the lens. Since the lens is positioned with respect to the mold inside the alignment portion, the opening of the imaging lens unit can be made smaller than when the lens is positioned outside the alignment portion.
- At least two alignment portions are arranged around at least one of the first and second optical surfaces, and each alignment portion is provided. Are separated.
- the positioning portion has a support surface that protrudes outward from the inscribed circle of the positioning portion around the first or second optical surface and prevents rotation of the alignment portion around the lens optical axis. .
- the lens misalignment and the height direction (direction parallel to the lens optical axis) but also the rotation of the lens can be restricted.
- At least one alignment unit is arranged around at least one of the first and second optical surfaces so as to surround the optical surface.
- the lens positioning portion has a mechanism for sucking the lens.
- the lens can be positioned stably.
- 1A, 1B, and 1C are a plan view, a side view, and a back view illustrating the imaging lens unit according to the first embodiment.
- 2A, 2B, and 2C are a plan view, an AA arrow sectional view, and a BB arrow sectional view illustrating the imaging lens unit of FIG. 3A, 3B, and 3C are an AA arrow cross-sectional view, a BB arrow cross-sectional view, and a rear view illustrating the lenses that constitute the imaging lens unit of FIG.
- It is a flowchart explaining the manufacture procedure of the imaging lens unit shown in FIG. 5A and 5B are cross-sectional views illustrating the setting of the lens on the mold by the transport device.
- FIG. 6A and 6B are conceptual diagrams illustrating a lens alignment unit and a mold positioning unit.
- FIG. 7A is a cross-sectional view illustrating the formation of the cavity in the manufacturing apparatus
- FIG. 7B is a cross-sectional view illustrating the formation of the holder member.
- FIG. 8A is a cross-sectional view illustrating mold opening in the manufacturing apparatus
- FIG. 8B is a cross-sectional view illustrating removal of the imaging lens unit.
- 9A to 9D are diagrams for explaining the imaging lens unit and the like according to the second embodiment.
- 10A and 10B are diagrams illustrating a method for manufacturing the imaging lens unit of FIG. 11A to 11D are views for explaining an imaging lens unit and the like according to the third embodiment.
- 12A and 12B are diagrams illustrating a method for manufacturing the imaging lens unit of FIG. 13A to 13D are views for explaining the imaging lens unit of the fourth embodiment.
- 14A and 14B are diagrams illustrating a method for manufacturing the imaging lens unit of FIG. 15A to 15D are views for explaining the imaging lens unit of the fifth embodiment.
- 16A and 16B are diagrams illustrating a method for manufacturing the imaging lens unit of FIG. It is sectional drawing explaining the imaging lens unit of 6th Embodiment. It is a conceptual diagram explaining the manufacturing method etc. of the imaging lens unit of 7th Embodiment.
- 19A to 19C are views for explaining lenses constituting the imaging lens unit of the eighth embodiment.
- 20A to 20D are views for explaining an imaging lens unit according to the eighth embodiment.
- FIG. 22A and 22B are cross-sectional views illustrating modifications of the lenses that constitute the imaging lens units of the fourth and fifth embodiments, respectively.
- FIG. 19 is a conceptual diagram illustrating a modified example of a method for manufacturing the imaging lens unit illustrated in FIG.
- the imaging lens unit 100 includes a compound type or hybrid type lens 10 and a rectangular frame-shaped holder member 40 that supports the lens 10.
- the lens 10 is, for example, an individualized lens cut out by dicing from a lens wafer or a wafer lens (wafer-like base material) in which a large number of lenses are two-dimensionally arranged. As shown in FIGS. 2A to 2C, FIGS. 3A to 3C, and the like, the lens 10 has a square plate-like contour.
- the lens 10 is a compound lens having a structure in which a plate-like glass substrate 11 is sandwiched between a first lens layer 12 and a second lens layer 13 made of resin.
- the glass substrate 11 is a flat plate having optical transparency.
- the glass substrate 11 is not limited to glass but can be replaced with a substrate formed of a resin material or the like. Further, the glass substrate 11 can be provided with a function such as an IR cut filter.
- the first lens layer 12 includes a lens body portion 12a having a circular outline provided at a central portion around the lens optical axis OA and a frame portion 12b having a square outline extending around the lens body portion 12a.
- the lens body portion 12a is, for example, an aspheric lens portion, and has a first optical surface 12d on the exposed surface side.
- the optical surface here means a portion having an optical function, that is, a surface having an effective diameter.
- the frame portion 12b is a flat layer and has a first frame surface 10d on the surface side.
- the first frame surface 10d is a flat surface extending perpendicular to the lens optical axis OA.
- the inner first optical surface 12 d and the outer first frame surface 10 d are the first surface of the lens 10.
- the first lens layer 12 is made of a curable resin having reflow heat resistance, for example. Examples of the curable resin include a thermosetting resin, a photocurable resin, and a radiation curable resin.
- the second lens layer 13 also has a lens body portion 13a having a circular contour provided in the center portion around the lens optical axis OA and a frame portion 13b having a rectangular contour extending around the lens body portion 13a.
- the lens body 13a is an aspherical lens, for example, and has a second optical surface 13e on the exposed surface side.
- the frame portion 13b is a flat layer and has a second frame surface 10e on the surface side.
- the second frame surface 10e is a flat surface extending perpendicular to the lens optical axis OA.
- the inner second optical surface 13e and the outer second frame surface 10e form a second surface of the lens 10.
- the second lens layer 13 is formed of, for example, a curable resin having reflow heat resistance.
- the upper lens body portion 12a, the lower lens body portion 13a, and the central portion of the glass substrate 11 sandwiched therebetween constitute a central optical portion 10a that functions as a lens.
- the upper frame portion 12 b, the lower frame portion 13 b, and the peripheral side portion of the glass substrate 11 sandwiched between them spread around the central optical portion 10 a and have an inner circular shape and an outer square shape.
- the flange part 10b (outer peripheral part) is configured.
- first lens layer 12 and the second lens layer 13 may be formed of a thermoplastic resin instead of the curable resin.
- the lens 10 has an alignment portion 14 integrated with the frame portion 13 b on the frame portion 13 b of the second lens layer 13.
- the alignment unit 14 is provided at four positions on the diagonal line of the lens 10 outside the second optical surface 13e, that is, outside the effective diameter, and is equally spaced at four positions along the circumference. Is arranged in. That is, the alignment unit 14 is a combination of the plurality of divided alignment units 14.
- Each alignment part 14 is a protrusion having a columnar convex shape, for example, which is erected on the surface (second frame surface 10e) outside the second optical surface 13e.
- the alignment part 14 has a level
- alignment in a direction perpendicular to the lens optical axis OA can be easily and reliably performed using a plurality of sets of alignment portions 14.
- These alignment portions 14 are integrated with a part of the outside of the second optical surface 13 e and are formed of the same resin material as that of the second lens layer 13.
- the holder member 40 that supports the lens 10 is made of at least heat-resistant resin that can withstand heat treatment described later, and preferably has reflow heat resistance, for example. It is made of a thermoplastic resin (for example, LCP (Liquid Crystal Polymer), PPA (Polyphthalamide), etc.). At this time, the holder member may be colored black. In such a case, the holder member has an effect of blocking extra light on the outer peripheral portion.
- the holder member 40 includes an upper portion 41 having a square plate-like outline and a side wall portion 43 having a square cylindrical outline. Inside the holder member 40, the lens 10 is held and fixed so as to be fitted.
- the holder member 40 is formed by resin injection molding and is formed as an integral single member.
- the lens 10 and the holder member 40 are formed of a material having reflow heat resistance, the imaging lens unit 100 having heat resistance can be processed in the reflow process.
- the holder member 40 holds the flange portion 10b of the lens 10 so as to wrap from the periphery. That is, the upper portion 41 of the holder member 40 faces the first frame surface 10d on the upper side of the lens 10 and restricts the upward movement of the lens 10 along the lens optical axis OA.
- the side wall portion 43 faces the four side surfaces 10f of the lens 10 to restrict movement in the lateral direction perpendicular to the lens optical axis OA of the lens 10 and faces the second frame surface 10e on the lower side of the lens 10. The downward movement of the lens 10 along the lens optical axis OA is limited.
- the holder member 40 which is a single member is in close contact with the periphery of the flange portion 10b of the lens 10, the movement of the lens 10 with respect to the holder member 40 can be reliably prevented. Further, since the holder member 40 is in close contact with the lens surface without a gap, it is possible to suppress a ghost generated by light incident from the gap.
- the lower inner surface 41 g of the upper portion 41 is in close contact with the peripheral region of the first frame surface 10 d of the lens 10.
- a circular opening OP1 is formed at the center of the upper portion 41, and an annular edge 40i surrounding the opening OP1 is arranged so as to shield the periphery of the first optical surface 12d of the lens 10. Therefore, it functions as a kind of aperture.
- the side wall portion 43 includes a square cylindrical wall body portion 43a and a square fixing portion 43b provided inside the wall body portion 43a.
- the former wall body portion 43a is integrally connected to the upper portion 41 at the upper end.
- An inner surface 43f of the upper portion of the wall portion 43a is in close contact with the side surface 10f of the lens 10.
- the latter fixing portion 43b is provided so as to extend inward from the upper and lower central portions along the lens optical axis OA of the wall portion 43a, and is a plate-like body having an inner circular shape and an outer rectangular shape.
- the upper inner surface 43g is in close contact with the peripheral region of the second frame surface 10e of the lens 10.
- An annular edge 40j surrounding the opening OP2 formed in the center of the fixed portion 43b functions as a kind of stop by being arranged so as to shield the periphery of the optical surface 13e of the lens 10.
- the first and second optical surfaces 12d and 13e that are finally exposed out of the first surface on the upper side of the lens 10 are in contact with the first and second molds 51 and 61 when the holder member 40 is molded.
- the surface portion excluding the regions near the second optical surfaces 12d and 13e comes into contact with the liquid resin before solidification when the holder member 40 is injection molded.
- the resin is solidified, for example, the inner surface 41g of the upper portion 41 of the holder member 40 adheres to the first frame surface 10d of the lens 10, and the inner surface 43g of the fixing portion 43b adheres to the second frame surface 10e of the lens 10. It has become a state.
- the surface of the lens 10 is made of resin.
- the first frame surface 10 d of the lens 10 and the inner surface 41 g of the upper portion 41 of the holder member 40 are affected by the heat generated during the injection molding of the holder member 40.
- the surface of the frame surface 10d is softened and firmly joined to each other by welding. That is, the first frame surface 10d and the inner surface 41g are in a state of being directly joined without using an adhesive.
- the side surface 10f of the lens 10 and the inner surface 43f of the side wall 43 of the holder member 40 are directly joined without using an adhesive
- the second frame surface 10e of the lens 10 and the holder member 40 are The inner surface 43g of the fixing portion 43b is in a state of being directly joined without using an adhesive.
- the fixing portion 43b of the holder member 40 has a side surface 14b excluding a part of the side surface 14b (exposed portion 14a) of the alignment portion 14 of the lens 10 shown in FIGS. 3B and 3C, and a bottom surface 14c as an adhesive. It is in the state joined directly without using. In addition, the part joined to the bottom face 14c of the alignment part 14 among the fixing
- the imaging lens unit 100 having such a configuration, since the holder member 40 is in close contact with the periphery of the lens 10 without any gap, it is possible to prevent the occurrence of ghost and flare due to the incidence of light from the side surface 10f of the lens 10. can do. In addition, since there is no unnecessary gap on the side surface 10f of the lens 10, the imaging lens unit 100 is reduced in size, and it is easy to satisfy the appearance specifications required when it is assumed to be mounted on a final product such as an imaging device. Deterioration of dimensional accuracy due to deformation at the time of mold release as in a conventional holder and contraction of the holder member is also suppressed.
- the lens 10 is a compound lens, but the entire lens 10 may be formed of a single resin material.
- the resin lens layers 12 and 13 may be disposed on the center side, and the outermost edge of the lens 10 may be the glass substrate 11 exposed.
- a mold apparatus 90 including a molding die 91 having a fixed first mold (fixed mold) 51 and a movable second mold (movable mold) 61 is provided.
- a mold apparatus 90 including a molding die 91 having a fixed first mold (fixed mold) 51 and a movable second mold (movable mold) 61 is provided.
- both molds 51 and 61 are opened (step S11 in FIG. 4).
- die) 51 is provided with the 1st shaping
- the first molding portion 59 is formed on the tip portion 54 of the mold portion 53 and the mold plate 52 fixed so as to be embedded in the hole 52 c of the mold plate 52 of the first mold 51.
- the tip portion 54 of the mold portion 53 is a support portion for the lens 10 and has a resin blocking portion 55 on the outer peripheral side.
- the second mold (movable mold) 61 is provided with a second molding part 69 so as to face the first molding part 59 and to be recessed from the parting surface 61a.
- the second molding part 69 is formed in the tip part 64 of the mold part 63 and the mold plate 62 fixed so as to be embedded in the hole 62 c of the mold plate 62 of the second mold 61.
- the tip portion 64 of the mold portion 63 is a support portion for the lens 10 and has a positioning portion 65 on the outer peripheral side.
- the positioning unit 65 contacts the inner side of the positioning unit 14 of the lens 10, more specifically, the exposed portion 14 a on the inner side of the side surface 14 b to position the lens 10 with respect to the second mold 61.
- the inside of the alignment unit 14 passes through the center of the alignment unit 14 in the alignment unit 14 and the center of the second optical surface 13e and the center of the alignment unit 14.
- An exhaust hole 81 is formed in the second mold 61 so as to communicate with the mold portion 63.
- the exhaust hole 81 passes through the axis of the mold part 63 and communicates with a decompression device (not shown) attached to the mold device 90.
- the tip portion (support portion) 64 of the mold portion 63 functions as an adsorption portion of the lens 10 by providing an opening portion at the tip of the exhaust hole 81.
- the exhaust hole 81 can be exhausted to the outside at an appropriate timing by the decompression device, and the tip portion (support portion) 64 of the mold portion 63 is decompressed by decompressing the space S2 adjacent to the second optical surface 13e.
- the lens 10 placed thereon can be sucked and fixed on the positioning portion 65 with a desired suction force. For example, when removing the lens 10 from the second mold 61, if it is desired to release the fixation of the lens 10 to the tip 64, the decompression of the space S2 may be stopped.
- a groove-shaped resin injection path (not shown) is provided on the parting surfaces 51a and 61a side of both molds 51 and 61.
- a heating mechanism for heating the first and second molds 51 and 61 and a platen for pressing the first and second molds 51 and 61 from behind are also provided. Therefore, illustration is omitted.
- the conveyance device 70 has an arm 71 that detachably holds the lens 10.
- the arm 71 is remotely driven by a control drive device (not shown) and conveys the lens 10 to a position facing the second molding unit 69.
- the arm 71 may be one that mechanically sandwiches the lens 10, but may be one that sucks the lens 10 with a negative pressure, for example.
- the arm 71 of the transfer device 70 is brought close to the lens 10 until the lens 10 comes close to the second molding part 69.
- the lens 10 held by the arm 71 is brought into contact with the inside of the positioning portion 14 of the lens 10 and the outside of the positioning portion 65 provided at the tip portion (support portion) 64 of the mold portion 63 of the second mold 61. Fit into.
- the end surface of the template 62 (second It does not contact the molding portion 69).
- the alignment portion 14 and the positioning portion 65 are in a line contact state. Specifically, of the side surface 14b of the alignment portion 14 of the lens 10, the exposed portion 14a and the support side surface 65b of the positioning portion 65 of the second mold 61 are in linear contact. As described above, centering is performed by the positioning portion 65 with respect to the lens 10 fitted on the second molding portion 69.
- the lens optical axis OA of the lens 10 and the axis AX of the mold part 63 or the second molding part 69 substantially coincide.
- a decompression device (not shown) is operated, and the lens 10 is sucked into the second mold 61.
- the arm 71 is switched to the released state, and the lens 10 released from being held by the arm 71 is placed on the second molding part 69 and supported in an aligned state on the second molding part 69. (Installation process; Step S13 in FIG. 4).
- the lens 10 placed on the tip portion (support portion) 64 is prevented from being tilted after centering, and the lens optical axis OA is kept parallel to the axis AX. It is. Thereafter, as shown in FIG. 5B, the transfer device 70 is retracted from between both molds 51 and 61.
- the mold for the holder member 40 is placed between the first mold 51 and the second mold 61 by moving the second mold 61 and closing and clamping the mold.
- a cavity CA that is a space is formed (mold space forming step; step S14 in FIG. 4).
- the first molding part 59 provided in the first mold 51 and the second molding part 69 provided in the second mold 61 are aligned and engaged.
- the first molding part 59 is formed with transfer surfaces 59s, 59t and the like for molding the outer surface 41s and the inner surface 41t of the holder member 40 shown in FIGS. 1A to 1C.
- transfer surfaces 69p, 69r and the like for forming the outer surface 43p and the inner surface 43r of the holder member 40 are formed in the second molding portion 69 on the second mold 61 side.
- an annular resin blocking part 55 is formed at the tip part (support part) 54 of the mold part 53.
- the resin blocking portion 55 is in close contact with the innermost peripheral portion of the flange portion 10b of the lens 10 and blocks the flowing resin MP from flowing into the space S1 adjacent to the optical surface 12d during the molding process described later (see FIG. 7B).
- the resin blocking portion 55 holds the lens 10 toward the second molding portion 69 after the mold clamping, and also has a role of stabilizing the lens 10 in the cavity CA and preventing backlash.
- an annular positioning portion 65 is formed at the tip portion (support portion) 64 of the mold portion 63 on the second molding portion 69 side provided in the second mold 61 (see FIG. 6B).
- the positioning part 65 positions the lens 10 with respect to the second mold 61 and is in close contact with the flange part 10b of the lens 10 to prevent the flowing resin MP from flowing into the space S2 adjacent to the optical surface 13e.
- the positioning portion 65 gently presses the lens 10 toward the first mold 51 in contact with the innermost peripheral portion of the flange portion 10b of the lens 10 when the cavity CA is formed as a molding space by clamping. Thus, the lens 10 is stabilized in the cavity CA to prevent backlash.
- a fluid resin MP to be a material of the holder member 40 is filled into a cavity CA that is a molding space via a runner (not shown).
- the 1st frame surface 10d, the side surface 10f, and the 2nd frame surface 10e are each covered with resin among the flange parts 10b of the lens 10.
- the holder member 40 is shape
- the imaging lens unit 100 fixed in a state where the lens 10 is supported between the openings OP1 and OP2 of the holder member 40 as shown in FIGS. 1A to 1C and the like is completed.
- the resin blocking portion 55 and the positioning portion 65 provided in the first and second molding portions 59 and 69 prevent the flowing resin MP from flowing into the spaces S1 and S2, and as a result, the holder member 40. It has a role of forming the openings OP1 and OP2.
- the second mold 61 is retracted by opening the mold away from the first mold 51 (step S16 in FIG. 4). Thereafter, the space S ⁇ b> 2 is decompressed, and the imaging lens unit 100 remaining in the second mold 61 is projected and released using an unillustrated ejector pin or the like provided in the second mold 61. Thereby, the imaging lens unit 100 as a completed product can be taken out from the second mold 61 (step S17 in FIG. 4). At this time, a runner portion (not shown) is separated from the holder member 40 of the imaging lens unit 100 in accordance with the operation of pushing the imaging lens unit 100 out of the second molding portion 69. The imaging lens unit 100 released from the second mold 61 is carried out of the mold apparatus 90 by the transfer apparatus 70 as shown in FIG. 8B.
- the lens 10 since the lens 10 has the alignment portion 14, the lens 10 is positioned with high accuracy with respect to the second mold 61 when the holder member 40 is molded, and the holder The member 40 and the lens 10 are positioned with high accuracy.
- the lens 10 can be positioned with respect to the second mold 61 using the alignment portion 14 provided outside the second optical surface 13e, the second mold 61 and the resin are formed when the holder member 40 is molded. It is possible to mitigate the influence of heat and pressure generated due to the above on the second optical surface 13e of the lens 10. Therefore, it is possible to prevent deterioration such as distortion on the second optical surface 13e of the lens 10 when the holder member 40 is molded.
- opening OP2 of the imaging lens unit 100 should be made smaller than positioning the lens 10 outside the alignment part 14. Can do.
- the alignment portion 214 of the lens 10 has a convex shape and a shape having a slope with respect to the lens optical axis OA.
- the alignment unit 214 is hemispherical, and the slope is a curved surface 214b.
- the positioning portion 265 of the second mold 61 is annular, and the tip portion 65c is tapered.
- the inner exposed portion 14a and the outer support side surface 65b of the positioning portion 265 of the curved surface 214b of the alignment portion 214 are defined. Point contact.
- positioning portion 265) is not high compared to other embodiments or the like (the angle is somewhat steep or gentle). Positioning).
- the alignment portion 314 of the lens 10 has a convex shape and a shape having an inclined surface with respect to the lens optical axis OA.
- the alignment unit 314 is a truncated cone, and the inclined surface is a flat surface (surface having no curvature in a specific direction) 314b.
- the positioning portion 365 of the second mold 61 is annular, and the tip end portion 65c is tapered. As shown in FIG.
- the lens 10 when positioning the lens 10 with respect to the second mold 61, the inner exposed portion 14a of the flat surface 314b of the alignment portion 314 and the outer support side surface 65b of the positioning portion 365, Makes line contact.
- the flat surface 314b of the alignment portion 314 serves as an invitation to the support side surface 65b of the positioning portion 365 of the second mold 61, the lens 10 is placed in the second mold 61 more than in the first embodiment. Can be easily inserted into.
- the alignment portion 414 of the lens 10 is provided to surround the second optical surface 13e outside the second optical surface 13e of the lens 10. ing.
- the alignment portion 414 has an annular convex shape and has a shape having an inclined surface with respect to the lens optical axis OA.
- the alignment unit 414 has a triangular cross section parallel to the lens optical axis OA.
- the positioning portion 465 of the second mold 61 is annular, and the tip portion 65c is tapered. As shown in FIG.
- the exposed portion 14a inside the alignment portion 414 and the support side surface 65b outside the positioning portion 465 are in surface contact.
- the lens 10 can be positioned more stably with respect to the second mold 61 than in the first embodiment or the like.
- the alignment portion 514 of the lens 10 is provided to surround the second optical surface 13e outside the second optical surface 13e of the lens 10. ing.
- the alignment portion 514 has an annular concave shape and has a shape having an inclined surface with respect to the lens optical axis OA.
- the alignment unit 514 is a groove, and a cross section parallel to the lens optical axis OA is a triangle.
- the positioning portion 565 of the second mold 61 is annular, and the tip portion 65c has a sharp tapered shape. As shown in FIG.
- the exposed portion 14a inside the alignment portion 514 and the support side surface 65b outside the positioning portion 565 are in surface contact.
- the lens 10 is more stable with respect to the second mold 61 than in the first embodiment. Can be positioned.
- the lens 10 includes a diaphragm 15 between the glass substrate 11 and the first lens layer 12, that is, inside the lens 10.
- the diaphragm 15 may be provided on the surface of the first lens layer 12. Further, the diaphragm 15 may be provided on the second lens layer 13 side.
- the positioning portion 765 has a support surface 65d provided with a portion protruding outward (in a direction away from the axis AX) from the inscribed circle M of the positioning portion 765.
- the support surface 65d is included in the support side surface 65b.
- the support surface 65d provided in the positioning portion 765 serves as a stopper, and the movement of the alignment portion 14 in the rotational direction is limited. Thereby, not only the misalignment and the height direction of the lens 10 (the direction parallel to the lens optical axis OA) but also the rotation of the lens 10 can be restricted.
- the alignment portions 814 are arranged at three equal intervals along the circumference. Thereby, it can be set as the resin amount smaller than the case of 1st Embodiment.
- the holder member 40 of the imaging lens unit 100 shown in FIG. 20A and the like has a cylindrical outer shape.
- the outer shape of the holder member 40 is appropriately changed depending on the specification, and may be a rectangular cylinder like the holder member 40 of the first embodiment. In the first to seventh embodiments, the outer shape of the holder member 40 may be cylindrical as in the eighth embodiment.
- the lens 10 may be a single lens made of glass or resin.
- the shape and structure of the lens 10 are merely examples, and can be changed as appropriate.
- the lens 10 is not limited to a square in plan view but can be circular in plan view.
- the horizontal mold apparatus 90 moves the second mold 61 in the left-right direction.
- the vertical mold apparatus 90 moves the second mold 61 in the vertical direction. can do.
- a suction mechanism such as the exhaust hole 81 may not be provided.
- thermoplastic resin was used as a resin material which comprises the holder member 40, it is not restricted to this, It is also possible to use curable resins, such as a thermosetting resin and a photocurable resin. is there.
- a plurality of molding portions may be provided on the mold, and holder molding may be performed simultaneously on a plurality of lenses.
- the members for alignment of the two molds in each molding part are provided with taper pins and fitting holes to be fitted to the molds at two locations in the entire mold. Then, a common alignment member may be used for the plurality of molding parts.
- the alignment portions 314 and 414 of the lens 10 have a shape having a slope with respect to the lens optical axis OA.
- the lens optical axis It is good also as a shape which has a surface parallel to OA.
- the number of alignment portions 14 of the lens 10 may be two instead of four as shown in FIG. Further, four or more alignment portions 14 may be provided.
- the exposed portion 14 a where the alignment portion 14 contacts the positioning portion 65 is exposed without the holder member 40 being formed, but a slight gap is formed between the alignment portion 14 and the positioning portion 65.
- a thin resin may be formed on the exposed portion 14a. This is basically because there are many cases where alignment is performed without a gap.
- a gap may be formed due to partial deviation due to the processing accuracy of the second mold 61. is there.
- the gap is very small, and the other part is molded with no gap, so that no major problem occurs.
- the positioning portion 65 may be provided not on the movable second mold 61 but on the fixed first mold 51.
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Abstract
Description
以下、図面を参照して、本発明の第1実施形態に係る撮像レンズユニットの製造方法やこれによって得られる撮像レンズユニットについて説明する。
以下、第2実施形態に係る撮像レンズユニットの製造方法等を説明する。なお、第2実施形態に係る撮像レンズユニットの製造方法等は、第1実施形態の撮像レンズユニット100の製造方法等を一部変更したものであり、特に説明しない部分は、第1実施形態と同様であるものとする。
以下、第3実施形態に係る撮像レンズユニットの製造方法等を説明する。なお、第3実施形態に係る撮像レンズユニットの製造方法等は、第1実施形態の撮像レンズユニット100の製造方法等を一部変更したものであり、特に説明しない部分は、第1実施形態と同様であるものとする。
以下、第4実施形態に係る撮像レンズユニットの製造方法等を説明する。なお、第4実施形態に係る撮像レンズユニットの製造方法等は、第1実施形態の撮像レンズユニット100の製造方法等を一部変更したものであり、特に説明しない部分は、第1実施形態と同様であるものとする。
以下、第5実施形態に係る撮像レンズユニットの製造方法等を説明する。なお、第5実施形態に係る撮像レンズユニットの製造方法等は、第4実施形態の撮像レンズユニット100の製造方法等を一部変更したものであり、特に説明しない部分は、第4実施形態と同様であるものとする。
以下、第6実施形態に係る撮像レンズユニットの製造方法等を説明する。なお、第6実施形態に係る撮像レンズユニットの製造方法等は、第1実施形態の撮像レンズユニット100の製造方法等を一部変更したものであり、特に説明しない部分は、第1実施形態等と同様であるものとする。
以下、第7実施形態に係る撮像レンズユニットの製造方法等を説明する。なお、第7実施形態に係る撮像レンズユニットの製造方法等は、第1実施形態の撮像レンズユニット100の製造方法等を一部変更したものであり、特に説明しない部分は、第1実施形態と同様であるものとする。
以下、第8実施形態に係る撮像レンズユニットの製造方法等を説明する。なお、第8実施形態に係る撮像レンズユニットの製造方法等は、第1実施形態の撮像レンズユニット100の製造方法等を一部変更したものであり、特に説明しない部分は、第1実施形態と同様であるものとする。
Claims (18)
- 第1光学面と前記第1光学面とは反対側に形成された第2光学面とを有するレンズと、前記第1及び第2光学面を露出させた状態で前記レンズを内部に保持するように一体成形されたホルダー部材と、を備える撮像レンズユニットであって、
前記レンズは、前記ホルダー部材を成形するための成形空間を有する金型内に前記レンズを配置する際に、前記レンズを前記金型に対して位置決めする位置合わせ部を有し、
前記位置合わせ部は、前記第1及び第2光学面のいずれか一方の外に設けられており、前記位置合わせ部の内側の少なくとも一部が前記ホルダー部材から露出している、撮像レンズユニット。 - 前記位置合わせ部は、前記レンズのうち前記第1又は第2光学面のいずれか一方の外の一部に一体化して形成されている、請求項1に記載の撮像レンズユニット。
- 前記位置合わせ部は、前記レンズの前記第1又は第2光学面以外の表面に対して凸形状及び凹形状の少なくとも一方を有する、請求項1及び2のいずれか一項に記載の撮像レンズユニット。
- 前記位置合わせ部は、前記第1又は第2光学面の外縁から延在する外周部の平坦面に対して段差を有する、請求項1及び2のいずれか一項に記載の撮像レンズユニット。
- 前記位置合わせ部は、前記第1及び第2光学面の少なくともいずれか一方の周囲に少なくとも2つ配置されており、
各位置合わせ部が分離している、請求項1から4までのいずれか一項に記載の撮像レンズユニット。 - 前記位置合わせ部の形状は、円柱形、四角柱形、及びレンズ光軸に対して斜面を有する形状のいずれか1つである、請求項5に記載の撮像レンズユニット。
- 前記位置合わせ部は、前記第1及び第2光学面の少なくともいずれか一方の周囲に前記光学面を囲むような形状であって、少なくとも1つ配置されている、請求項1から4までのいずれか一項に記載の撮像レンズユニット。
- 前記位置合わせ部の形状は、レンズ光軸に平行な面を有する形状及び前記レンズ光軸に対して斜面を有する形状のいずれか1つである、請求項7に記載の撮像レンズユニット。
- 前記レンズは、樹脂で形成されている、請求項1から8までのいずれか一項に記載の撮像レンズユニット。
- 前記レンズは、ガラス基板と前記ガラス基板の少なくとも一方の表面に形成された樹脂部とを有し、
前記位置合わせ部は、前記樹脂部に形成されている、請求項1から8までのいずれか一項に記載の撮像レンズユニット。 - 前記レンズは、前記レンズの表面及び内部の少なくとも一方に絞りを有する、請求項1から10までのいずれか一項に記載の撮像レンズユニット。
- 前記レンズは、ウェハーレンズをダイシングして個片化したものである、請求項1から11までのいずれか一項に記載の撮像レンズユニット。
- 第1光学面と前記第1光学面とは反対側に形成された第2光学面とを有するレンズと、前記第1及び第2光学面を露出させた状態で前記レンズを内部に保持するように一体成形されたホルダー部材と、を備える撮像レンズユニットの製造方法であって、
ホルダー部材を形成する成形金型は、第1金型と第2金型とを有し、
前記レンズは前記第1及び第2光学面のいずれか一方の外に設けられ前記第1又は第2金型に対して前記レンズを位置決めする位置合わせ部を有し、
前記第1及び前記第2金型のいずれか一方は、前記位置合わせ部に対向し、前記レンズを位置決めする位置決め部を有し、
前記位置決め部の少なくとも一部が前記レンズの前記位置合わせ部の内側の面に接触するように前記レンズを前記第1又は第2金型に挿入する工程と、
前記レンズが前記第1又は第2金型に対して位置決めされた状態で型締を行う工程と、
前記第1及び第2金型に前記レンズを内包させた状態で樹脂を流入させて前記ホルダー部材を成形する工程と、
前記第1及び第2金型を相対的に開いて前記撮像レンズユニットを取り出す工程と、
を備える、撮像レンズユニットの製造方法。 - 前記位置合わせ部は、前記第1及び第2光学面の少なくともいずれか一方の周囲に少なくとも2つ配置されており、
各位置合わせ部が分離している、請求項13に記載の撮像レンズユニットの製造方法。 - 前記位置決め部は、前記第1又は第2光学面の周辺に前記位置決め部の内接円よりも突出し、前記位置合わせ部のレンズ光軸まわりの回転を防ぐ支持面を有する、請求項14に記載の撮像レンズユニットの製造方法。
- 前記位置合わせ部は、前記第1及び第2光学面の少なくともいずれか一方の周囲に前記光学面を囲むような形状であって、少なくとも1つ配置されている、請求項13に記載の撮像レンズユニットの製造方法。
- 前記レンズの位置決め部は、前記レンズを吸引する機構を有する、請求項13から16までのいずれか一項に記載の撮像レンズユニットの製造方法。
- 前記レンズは、ウェハーレンズをダイシングして個片化したものである、請求項13から17までのいずれか一項に記載の撮像レンズユニットの製造方法。
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US20180315894A1 (en) * | 2017-04-26 | 2018-11-01 | Advanced Semiconductor Engineering, Inc. | Semiconductor device package and a method of manufacturing the same |
JP2019012111A (ja) * | 2017-06-29 | 2019-01-24 | 日本電産サンキョー株式会社 | レンズユニット |
TWI647480B (zh) | 2018-01-30 | 2019-01-11 | 大立光電股份有限公司 | 具有雙色模造光學元件的成像鏡頭與電子裝置 |
TWI689750B (zh) | 2019-03-20 | 2020-04-01 | 大立光電股份有限公司 | 光學鏡頭及電子裝置 |
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JPS60196317A (ja) * | 1984-03-19 | 1985-10-04 | Olympus Optical Co Ltd | 枠付レンズの成形方法とその装置 |
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JPWO2013047653A1 (ja) | 2015-03-26 |
US9151925B2 (en) | 2015-10-06 |
US20140233115A1 (en) | 2014-08-21 |
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