WO2013132708A1 - 複合成形レンズ及びその製造方法、金型並びに撮像モジュール - Google Patents
複合成形レンズ及びその製造方法、金型並びに撮像モジュール Download PDFInfo
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- WO2013132708A1 WO2013132708A1 PCT/JP2012/080597 JP2012080597W WO2013132708A1 WO 2013132708 A1 WO2013132708 A1 WO 2013132708A1 JP 2012080597 W JP2012080597 W JP 2012080597W WO 2013132708 A1 WO2013132708 A1 WO 2013132708A1
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- lens
- mold
- flange portion
- molded
- outer peripheral
- Prior art date
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. 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
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
-
- 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
- B29C45/14311—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 using means for bonding the coating to the articles
-
- 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
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
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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
- B29D11/00432—Auxiliary operations, e.g. machines for filling the moulds
-
- 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
- B29D11/0048—Moulds for lenses
- B29D11/00538—Feeding arrangements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound 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
- G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
-
- 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
-
- 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
- B29L2012/00—Frames
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/764—Photographic equipment or accessories
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/05—Press-mould die materials
- C03B2215/06—Metals or alloys
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/40—Product characteristics
- C03B2215/46—Lenses, e.g. bi-convex
- C03B2215/49—Complex forms not covered by groups C03B2215/47 or C03B2215/48
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/72—Barrel presses or equivalent, e.g. of the ring mould type
- C03B2215/73—Barrel presses or equivalent, e.g. of the ring mould type with means to allow glass overflow in a direction perpendicular to the press axis
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/79—Uniting product and product holder during pressing, e.g. lens and lens holder
Definitions
- the present invention relates to a composite molded lens formed by press molding and injection molding, a manufacturing method thereof, a mold, and an imaging module.
- the subject image is formed on the image sensor by the taking lens.
- the image displayed on the liquid crystal display is projected onto the screen by the projection lens.
- molded lenses obtained by press molding (press molding) while heating a preform (lens material) are often used.
- Molded lenses have the advantages of high optical performance and no need for post-processing such as polishing, but it is difficult to form a positioning surface perpendicular to the optical axis and an outer peripheral end surface to which the lens frame fits. Alternatively, it is difficult to increase the accuracy of alignment within the lens barrel and the centering of the lens. In recent years, molded lenses have become smaller and larger in diameter, and tend to be thinner than the outer diameter. As the molded lens is made thinner, especially in the case of a convex lens, its outer peripheral portion becomes extremely thin and it becomes difficult to attach a lens frame or the like, so that the mounting accuracy is further lowered.
- an optical element (lens main body) is molded by applying pressure with a first mold and a second mold while heating a lens material (preform). At this time, the outer peripheral portion of the optical element protrudes from the side surfaces of the first mold and the second mold. Cavities are formed in the side surfaces of the first mold and the second mold, and molten resin is injected into the cavities, and an optical element frame (lens frame) is injection-molded. Thereby, the optical element frame is coupled to the outer peripheral portion of the optical element, and an optical element (composite molded lens) integrated with the optical element frame is molded.
- the first mold and the second mold are used to form an optical lens (lens main body) by press molding while heating the glass, and then the resin is injection molded.
- an optical element device composite molded lens
- a frame laminated frame
- flange portion is formed on the outer periphery of the optical lens in order to prevent the resin from entering the surface of the optical lens during injection molding of the optical frame.
- a frame body is tightly coupled to the outer peripheral end face of the flat portion.
- a lens frame is formed by injection molding on the outer periphery of a press-molded lens body, there arises a problem that the bonding property (tightness bonding) between the outer periphery of the lens body and the lens frame is not sufficient. If the bonding property is poor, the bonding surface may be peeled off due to a difference in expansion due to a change in environmental temperature, a twist during assembly to the lens barrel, or the like.
- the composite molded lens of the present invention is provided with a plurality of protrusions and / or grooves extending radially toward the outer periphery on at least one surface of the flange portion.
- the composite molded lens includes a press-molded lens body and an injection-molded lens frame.
- the lens body has a lens part and a flange part surrounding the lens part, and the lens frame is integrated with the lens body so as to surround the flange part.
- the protrusions are formed higher on the outer peripheral side, and the grooves are formed deeper on the outer peripheral side, thereby forming a concave or convex portion on the outer peripheral end surface of the flange portion, which is located on the extended line of the protrusion or groove. It is preferable to do.
- a plurality of protrusions are formed on both surfaces of the flange portion and arranged so as to overlap in the vertical direction.
- Plural ridges are formed at a constant pitch on one side of the flange part, and grooves are formed at a constant pitch on another side of the flange part, so that these ridges and grooves do not overlap vertically. It is preferable to shift only by.
- the lens body can be freely selected from glass and resin as long as it can be press-molded.
- the lens frame is preferably made of resin in order to be molded by injection molding.
- the method of manufacturing a composite molded lens according to the present invention includes a preform placing step, a press molding step, a protrusion or groove forming step, and a lens frame molding step, and a lens portion and a flange portion surrounding the lens portion. Then, the lens body is pressed and molded, and then the lens frame is injection-molded so as to surround the flange portion, thereby manufacturing a composite molded lens in which the lens body and the lens frame are integrated.
- the preform placing step the preform of the lens material is placed between a pair of molding dies composed of a first die and a second die.
- the lens body is molded by pressing the preform by narrowing the distance between the first mold and the second mold until the outer periphery of the preform protrudes into the molding space of the lens frame.
- a plurality of ridges and / or grooves extending radially toward the outer periphery are formed on at least one surface of the flange portion during the press molding of the lens body.
- the lens frame molding step the lens frame is molded by injecting molten resin into the molding space of the lens frame while the first mold and the second mold are completely closed.
- At least one of the first mold and the second mold has a transfer surface for transferring the optical surface shape to one surface of the lens portion, and a space for forming a flange portion. And at least one surface of the flange portion is formed with concave or convex portions for forming a plurality of protrusions and / or grooves extending radially toward the outer periphery, and a lens frame forming space for forming the lens frame.
- a lens body having a lens portion and a flange portion surrounding the lens portion is pressed from a preform of the lens material.
- molten resin is injected, and a lens frame surrounding the flange portion is formed integrally with the lens body.
- the lens frame forming space and the concave portion or the convex portion are formed in both the first mold and the second mold.
- the imaging module of the present invention has at least one composite molded lens provided with a plurality of protrusions and / or grooves extending radially toward the outer periphery on at least one surface of the flange portion.
- the connection between the lens body and the lens frame is strengthened, and good bonding properties are achieved. Is obtained.
- FIG. 2 is a sectional view taken along line II-II in FIG. It is a top view of the lens main body manufactured by press molding. It is a side view of a lens body. It is sectional drawing of a metal mold
- FIG. 16 is a cross-sectional view taken along line XVI-XVI in FIG. 15. It is a side view of the lens body concerning a 4th embodiment.
- the composite molded lens 10 includes a lens body 14 formed by press molding (press molding) a transparent preform and a lens frame (frame body) 15 formed by injection molding.
- the lens body 14 includes a lens portion 12 and a flange portion 13 surrounding the lens portion 12.
- the lens frame 15 is injection-molded with a resin such as PMMA or PC, and is tightly bonded to the outer peripheral portion of the flange portion 13. Usually, an opaque resin is used.
- the gate part 19 is formed at the time of injection molding, it is cut out later as needed.
- the lens body 14 has eight protrusions 16 radially arranged on one side of the flange portion 13 at intervals of 45 °.
- the ridge 16 has a semi-elliptical shape with a flat planar shape, and has a circular arc or a semi-elliptical shape whose cross section is convex upward.
- the protrusion 16 becomes higher as it goes from the center side of the flange part 13 to an outer peripheral side.
- the flange portion 13 is crushed until the outer peripheral portion 17 protrudes into the lens frame forming space 25 (see FIG. 5).
- the outer peripheral portion 17 protruding into the lens frame molding space 25 becomes a joint surface between the flange portion 13 and the lens frame 15.
- the outline of the outer peripheral portion 17 is substantially circular when viewed from the top, but a recess 18 is formed on the extended line of the protrusion 16.
- the end surface of the outer peripheral portion 17 has a free curved surface that is pushed out and swelled when viewed from the side. Since the pressing force is weaker at the position on the extended line of the ridge 16 than at other positions, the recess 18 is formed. The shape of the recess 18 varies depending on the material (hardness) of the preform 11 and the amount of protrusion.
- the composite molded lens mold 20 is composed of a pair of molds of a first mold 21 and a second mold 24.
- the first mold 21 and the second mold 24 incorporate a heater (not shown) for heating and softening the preform 11.
- a transfer surface 22 that forms an optical surface on one surface of the lens portion 12, a flange portion forming surface 23 that forms a flange portion 13, and a lens frame forming space 25 are formed concentrically.
- a gate port 29 through which an optical resin for forming the lens frame 15 is injected is provided on the outer peripheral side of the lens frame molding space 25.
- the cross-sectional shape of the recess 26 is a curved surface shape that approximates a part of an ellipse.
- the second mold 24 is provided with a transfer surface 27 that forms an optical surface on the other surface of the lens portion 12.
- a convex part is provided instead of the recessed part 26.
- the preform 11 is placed on the second mold 24.
- die 24 is narrowed, and the preform 11 is pressed between the 1st metal mold
- the preform 11 is softened while the first mold 21 and the second mold 24 are heated by the built-in heater.
- the preform 11 is pressed and the lens body 14 is press-molded until the outer peripheral portion of the preform 11 protrudes into the lens frame molding space 25.
- the flange portion 13 of the lens body 14 is formed with a plurality of ridges 16 that radially increase toward the outer peripheral side, and is recessed in the radial direction corresponding to the position of the ridge 16 on the outer peripheral end surface of the outer peripheral portion 17.
- a recess 18 is formed.
- the lens body 14 is formed from the preform 11 and the press molding is completed.
- the outer peripheral portion 17 of the flange portion 13 becomes a joint surface where the lens body 14 and the lens frame 15 are joined.
- the outer peripheral end surface of the outer peripheral portion 17 is not a simple free-form surface, but is recessed by the amount of pressing force escaped by the groove 26 of the first mold 21, thereby forming recesses 18 at eight locations on the free-form surface.
- the concave portion 18 increases the torsional strength of the joint surface, and the joint force (tight joint force) of the lens frame 15 to the lens body 11 is comprehensively increased. Further, the strength of the flange portion 13 is also improved by the plurality of protrusions 16.
- the mold 30 includes a first mold 31 and a second mold 34, and the gate port 39 is formed in the second mold 34.
- the first mold 31 is the same as the first mold 21 of the first embodiment except that the lower end side is cut off by the thickness of the gate port 39, and the transfer surface 22 and the flange portion forming surface 23 are the same.
- the lens frame forming space 25 and eight grooves 26 are formed. As shown in FIG.
- the second mold 34 has the same shape as the first mold 24 of the first embodiment, and includes a transfer surface 27, a flange portion forming surface 33, and a lens frame forming space. 35 and 8 grooves 36 are formed.
- the composite molded lens 40 includes a lens body 44 and a lens frame 45.
- the lens body 44 has a lens portion 12 and a flange portion 43.
- Eight ridges 16 are formed radially at equal intervals on the upper surface of the flange portion 43, and eight ridges 46 are formed on the lower surface of the flange portion 43 so as to overlap these ridges 16.
- a plurality of recesses 48 are formed at a constant pitch on the end surface of the outer peripheral portion 47 of the flange portion 43.
- the plurality of recesses 48 prevent peeling due to the rotational force around the optical axis 49, and the outer peripheral portion 47 enters the lens frame 45, resulting in an acting force in the direction of the optical axis 49. Peeling is prevented, and the bondability of the lens frame 45 to the lens body 44 is improved.
- the upper surface side protrusion 16 and the lower surface side protrusion 46 are shifted from the flange portion 53 of the lens body 51 by 1/2 pitch (by 22.5 ° rotation). Are formed). If it does in this way, the recessed part 58a, 58b shifted
- the deformation range that becomes the concave portion 68 and the convex portion 69 may not reach the outer peripheral end surface of the outer peripheral portion 67.
- the planar shape of the outer peripheral end surface of the flange portion is a circle because there is no unevenness.
- the number of the protrusions 16 and the grooves 66 is not limited to four, and may be any number. Further, the ridges 16 and the grooves 66 may be formed on both surfaces of the flange portion 63. In this case, the positions of the ridges 16 and the grooves 66 may be different on the front and back sides or may be slightly shifted. Also good. In this way, the concave portion or free-form surface formed on the end face of the outer peripheral portion 67 becomes more complicated, so that the coupling force between the lens body and the lens frame is further increased.
- a plurality of grooves may be formed on one side of the flange portion. Further, a plurality of protrusions may be formed on one surface of the flange portion, and a plurality of grooves may be formed on the opposite surface.
- the cross-sectional shape of these protrusions or grooves may be a triangle, a quadrangle, or the like in addition to a curved surface such as an arc or a semi-elliptical shape, as long as it is a shape suitable for press molding.
- the lens body has a biconvex shape, but the shape of the lens surface is not limited to this, and may be, for example, a meniscus lens.
- the material of the lens body can be appropriately selected from glass and transparent plastic according to the purpose and application of the lens.
- the composite molded lens of the present invention can be used not only for an imaging module of a digital camera but also for an imaging module of a portable terminal device such as a mobile phone, a smartphone, a portable game machine, or a PDA (Personal / Digital / Assistant). .
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- Organic Chemistry (AREA)
- Ophthalmology & Optometry (AREA)
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- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
図1及び図2において、複合成形レンズ10は、透明なプリフォ―ムを押圧成形(プレス成形)したレンズ本体14と、射出成形したレンズ枠(枠体)15とを備えている。レンズ本体14は、レンズ部12と、これをとり囲むフランジ部13とを有する。レンズ枠15は、PMMAやPC等の樹脂で射出成形したものであり、フランジ部13の外周部分にしっかりと密着結合する。なお、通常は不透明な樹脂が用いられる。また、射出成形するときにゲート部19が形成されるが、後で必要に応じて切り取られる。
図8ないし図12に示す第2実施形態は、フランジ部の両面に突条を重なるように形成したものである。なお、各図において、第1実施形態と同じものには同じ符号が付してある。図8及び図9において、金型30は第1の金型31と第2の金型34とからなり、ゲート口39は第2の金型34に形成されている。第1の金型31はゲート口39の厚さ分だけ、下端側が削り取られている以外は、第1実施形態の第1の金型21と同じであり、転写面22、フランジ部形成面23、レンズ枠成形空間25、8本の溝26が形成されている。また、図9に示すように、第2の金型34は、第1実施形態の第1の金型24と同じ形状をしており、転写面27、フランジ部形成面33、レンズ枠成形空間35、8本の溝36が形成されている。この金型30によって、図10に示す複合成形レンズ40が成形される。
図13及び図14に示す第3実施形態では、レンズ本体51のフランジ部53に、上面側の突条16と下面側の突条46とが1/2ピッチずらして(22.5°回転させた位置に)形成されている。このようにすると、フランジ部53の外周部分57には、その外周端面に上下にずれた凹部58a,58bが交互に発する。これらの凹部58a,58bによって、外周端面の自由曲面がより複雑になるので、レンズ本体51に対するレンズ枠の接合力が更にアップする。なお、レンズ枠は、図1及び図2から明らかであるので、レンズ本体51についてのみ図示している。
図15~図17に示す第4実施形態では、レンズ本体61は、フランジ部63の上面に、4本の突条16と溝66が45°間隔で交互に形成されている。このようにすると、金型からはみ出る外周部分67には、突条16の延長線上には凹部68が形成される。また、溝66の延長線上には凸部69が形成される。これらの凹部68及び凸部69は、プリフォーム11の粘性度やレンズ枠成形空間にはみ出る量によって大きさや形状が異なる。そのために、凹部68や凸部69となる変形範囲が、外周部分67の外周端面に届かない場合もある。この場合には、フランジ部の外周端面の平面形状は、凹凸がないために円になる。
11 プリフォーム
12 レンズ部
13,43,53,63 フランジ部
14,44,51,61 レンズ本体
15 レンズ枠
16,46 突条
17,47,57,67 外周部分
18,48,58a,58b,68 凹部
20,30 複合成形レンズ用金型
21,31 第1の金型
22,27 転写面
23,33 フランジ部形成面
24,34 第2の金型
25,35 レンズ枠成形空間
26,36 金型の凹部
66 溝
69 凸部
Claims (10)
- レンズ部とこれを取り囲むフランジ部とを有し、押圧成形されたレンズ本体と、前記フランジ部を取り囲むように射出成形され、前記レンズ本体と一体化されたレンズ枠とを備える複合成形レンズであって、
前記フランジ部の少なくとも片面に、外周に向かって放射状に伸びた複数の突条及び溝の少なくとも一方を有する複合成形レンズ。 - 前記突条は外周側ほど高く形成され、そして前記溝は外周側ほど深く形成することにより、前記フランジ部の外周端面であって、前記突条又は溝の延長線上に位置している部分に凹又は凸が形成される請求項1記載の複合成形レンズ。
- 前記複数の突条は、フランジ部の両面に形成されるとともに、上下方向で重なるように所定ピッチで配置されている請求項2記載の複合成形レンズ。
- 前記フランジ部の片面に前記複数の突条が一定ピッチで形成され、前記フランジ部の別の片面に前記溝が一定ピッチで形成されるとともに、前記突条と前記溝とは上下で重ならないように、1/2ピッチずらされている請求項2記載の複合成形レンズ。
- レンズ部とこれを取り囲むフランジ部とを有し、押圧成形されたレンズ本体と、前記フランジ部を取り囲むように射出成形され、前記レンズ本体と一体化されたレンズ枠とを備える複合成形レンズのための製造方法であって、
レンズ素材のプリフォームを第1の金型と第2の金型の間に載置する工程と、
前記プリフォームの外周部分が前記レンズ枠の成形空間内にはみ出るまで、前記第1の金型と第2の金型との間で前記プリフォームを押圧して前記レンズ本体を押圧成形する工程と、
前記レンズ本体の押圧成形中に、前記フランジ部の少なくとも片面に、外周に向かって放射状に伸びた複数の突条及び溝の少なくとも一方を形成する工程と、
前記第1の金型及び第2の金型を開くことなく、前記レンズ枠の成形空間内に溶融した樹脂を射出して前記レンズ枠を成形する工程と、
を有する複合成形レンズの製造方法。 - 前記突条は外周側ほど高く形成され、そして前記溝は外周側ほど深く形成することにより、前記フランジ部の外周端面であって、前記突条又は溝の延長線上に位置している部分に凹又は凸が形成されている請求項5記載の複合成形レンズの製造方法。
- レンズ素材のプリフォームを第1の金型と第2の金型の間で押圧して、レンズ部とこれを取り囲むフランジ部とを有するレンズ本体を成形してから、溶融した樹脂を射出して前記フランジ部を取り囲むレンズ枠をレンズ本体と一体に形成するための複合成形レンズ用金型であって、前記第1の金型及び第2の金型の少なくとも一方は、
前記レンズ部の片面に光学面形状を転写するための転写面と、
前記フランジ部を形成するための空間と、
前記フランジ部の少なくとも片面に、外周に向かって放射状に伸びた複数の突条及び溝の少なくとも一方を形成するための凹部又は凸部と、
前記レンズ枠を成形するレンズ枠成形空間と、
が形成されている複合成形レンズ用金型。 - 前記レンズ枠成形空間は、前記第1の金型及び第2の金型の両方に形成されている請求項7記載の複合成形レンズ用金型。
- 前記凹部又は凸部は、前記第1の金型及び第2の金型の両方に形成されている請求項8記載の複合成形レンズ用金型。
- 請求項1から請求項4のいずれか1項記載の複合成形レンズを少なくとも1枚有する撮像モジュール。
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EP2824486A1 (en) | 2015-01-14 |
US9164253B2 (en) | 2015-10-20 |
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US20140347752A1 (en) | 2014-11-27 |
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