CN102375203A - Optical lens unit, plastic lens forming mold and plastic lens manufacturing method therefor - Google Patents
Optical lens unit, plastic lens forming mold and plastic lens manufacturing method therefor Download PDFInfo
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- CN102375203A CN102375203A CN2011103056715A CN201110305671A CN102375203A CN 102375203 A CN102375203 A CN 102375203A CN 2011103056715 A CN2011103056715 A CN 2011103056715A CN 201110305671 A CN201110305671 A CN 201110305671A CN 102375203 A CN102375203 A CN 102375203A
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Abstract
Disclosed is an invention that aims to accurately position a lens barrel and an optical lens and form a plastic lens easily with a high-precision forming mold. A plastic lens is formed by filling resin into a cavity surrounded by a fixed mold, a movable mold, and inserts, which are removably incorporated into respective molds. A lens portion and conical surfaces of the plastic lens are formed with the inserts. This provides enhanced forming accuracy by making the conical surfaces and lens portion concentric with each other. When the plastic lens is to be incorporated into the lens barrel, the conical surface of the plastic lens is allowed to be in line contact with the vertical inner circumferential surface of the lens barrel to make the plastic lens concentric with the lens barrel for the purpose of accurate positioning.
Description
The application be that March 16, application number in 2011 are 201110074773.0 the applying date, denomination of invention divides an application for the application for a patent for invention of " manufacturing approach of optical lens module and this plastic lens molding mould and plastic lens ".
Technical field
The present invention relates at portable phone and the palm terminal is that use or common zoom lens; And in digital camera etc., use as optical lens, particularly can locate the manufacturing approach of optical lens module with this plastic lens molding mould and the plastic lens of optical lens and lens barrel accurately.
Background technology
In recent years, be accompanied by the expansion in the portable terminal device market that is equipped with camera head, in camera head, carry the small-sized solid-state imager of high pixel and become trend.Corresponding with the miniaturization of this imaging apparatus, high pixelation, for example,, progressively popularize by the imaging lens system that a plurality of lens constitute like patent documentation 1, shown in 2.
Imaging lens system shown in the patent documentation 1; Have following formation: have 1 plastic lens and 1 sheet glass lens, and the lens barrel of these lens of having packed into, the lens periphery zone that plastic lens is contacted with glass lens is same curvature or same tapering face; When each lens is packed picture frame into; At the contact site of the plastic lens that makes the picture frame of packing at first and the continuing surface butt of lens barrel, under the state that lens barrel and plastic lens are positioned, when making the inner peripheral surface of glass lens and lens barrel chimeric; Through plastic lens is pressurizeed to optical axis direction; Continuing surface and glass lens with lens barrel are clamped plastic lens, and the tapering face through the same curvature that forms in the neighboring area of each lens or same tilt chimeric makes the optical axis coincidence of each lens.
In addition, in patent documentation 2, a kind of scheme has been proposed; This scheme is that the lens that are encased in the lens barrel all are the pick-up lenss that is made up of plastic lens, is used for the pick-up lens of common portable phone etc., and the lens of packing in the lens barrel all are that the plastic lens by easy processing and forming constitutes; In addition, in digital camera etc., zoom lens is as main flow; The lens of packing in the lens barrel only are made up of glass lens, perhaps normally like the above-mentioned glass lens of patent documentation 1 and the combination of plastic lens.At the pick-up lens shown in patent documentation 1 and the patent documentation 2; Like Fig. 3, shown in Figure 4; The external diameter that forms plastic lens is slightly less than the state of the internal diameter of lens barrel, keep and lens barrel between gap radially and insert lens barrel, to push the state of the lens that insert lens barrel along optical axis direction; The final stage lens with adhesive, are perhaps fixed with the lens flanging that is pressed into lens barrel.
Technical literature in the past
Patent documentation 1: the spy opens flat 9-113783 communique
Patent documentation 2: the spy opens the 2005-338869 communique
Imaging lens system shown in patent documentation 2 (patent documentation 1 is too), for example, as shown in Figure 3; Make the continuing surface U of the 1st plastic lens R1 that inserts lens barrel K at first and be formed on the bearing surface K1 butt on the lens barrel K; Because this continuing surface U and bearing surface K1 locate with respect to lens barrel K the 1st plastic lens R1, with this state perpendicular to optical axis at optical axis direction; In order with the 2nd plastic lens R2 (being glass lens in patent documentation 1) of next section ... insert; Through making at each lens R1 the edge part R1a of R2, the circular conical surface T that forms on the coincidence face of R2a chimeric each other (perhaps engaging); Making its modularization under the consistent state of each lens R1, R2 both sides' optical axis, the latter end lens that finally insert are fixed on the inner peripheral surface of lens barrel K with bonding agent etc.
Yet, the said lens crowd R1 of the said modulesization that in lens barrel K, disposes, R2......; Form each lens R1, the external diameter of R2...... is less than the state of lens barrel K internal diameter because and lens barrel K between form trickle gap; Through the continuing surface U of the plastic lens R1 that will insert at first and the bearing surface K1 butt of lens barrel K, with the whole plastic lens R1 of Componentized, R2...... positions with respect to lens barrel K; And, owing to the continuing surface U of above-mentioned plastic lens R1 and the bearing surface K1 of lens barrel K constitute with respect to optical axis is vertical, because each plastic lens R1; R2...... and the radial play between lens barrel K, each plastic lens R1, R2...... can radially move; Has each plastic lens R1, the problem that the bearing accuracy of R2...... reduces with respect to lens barrel K.
As preventing above-mentioned this each plastic lens R1, the method for the reduction of the bearing accuracy that cause in the gap radially of R2...... and lens barrel K, consideration will be inserted plastic lens R1 and the lens barrel K of lens barrel K at first in radial location.For example, plastic lens R1 and the lens barrel K that inserts at first adopted and each plastic lens R1 the concentric structure that R2 is identical.That is, as shown in Figure 4, at the continuing surface U of plastic lens R1; Form cone shape circular conical surface T1 and circular cone continuing surface T2 on the bearing surface K1 of lens barrel K respectively; If make these circular conical surfaces T1 and circular cone continuing surface T2 chimeric respectively (or engaging), with each plastic lens R1, the concentric structure of R2 is identical; Can be with lens barrel K and plastic lens R1 in radial location, lens barrel K and plastic lens R1 form concentric shape.As above above-mentioned; If with the plastic lens R1 that carries out concentric shape location with respect to lens barrel K as benchmark; In order that next section the 2nd plastic lens R2...... is overlapping, make each lens R1, the circular conical surface T of the last formation of R2...... is chimeric each other; Then can be with a plurality of plastic lens R1 among the lens barrel K, R2...... positions accurately.
Yet the plastic lens R that this optical lens adopts is through mould moulding with the mode of injection mo(u)lding.Ordinary construction about this plastic lens molding mould describes with reference to Fig. 5; The plastic lens molding mould is to be formed by fixed mould 100 and moveable die 101, and most important lens section R ' is with the mould abaculus 100A that can freely install in each mould 100,101 with loading and unloading in optical lens; 101A and moulding; Containing the edge part Ra of plastic lens R of the circular conical surface Ta of the excircle that is positioned at lens section R ', is with fixed mould 100 and moveable die 101 moulding.That is, fixed mould 100 and moveable die 101 two moulds 100,101 when matched moulds collide; Therefore the material with high rigidity forms, on the other hand, and mould abaculus 100A; 101A, the lens face forming mould abaculus 100A of lens section R ', cut is carried out after coating processing with plating Ni layer in the surface of 101A; From textural fixed mould 100, moveable die 101 and mould abaculus 100A, 101A forms with various parts; Then will be with mould abaculus 100A, 101A is with respect to fixed mould 100, and moveable die 101 is assembled.In order to assemble fixed mould 100, moveable die 101 and mould abaculus 100A; Need certain clearance between the 101A, because this gap, with fixed mould 100; The circular conical surface Ta that moveable die 101 forms and with mould abaculus 100A; Between the lens section R ' that 101A forms, may produce because of putting into mould abaculus 100A the gap during 101A and the skew radially that causes.That is, upwards can produce the forming errors that is called as skew in the footpath of circular conical surface Ta and lens section R '.The result causes the bearing accuracy with the chimeric lens section R ' of the circular cone continuing surface T2 of lens barrel K to reduce.
Summary of the invention
Present invention is directed at the problems referred to above; Its objective is provide a kind of can be with lens barrel and optical lens optical axis with hi-Fix; And, can be with optical lens module and the mould of plastic lens and the manufacturing approach of plastic lens of optical lens with the high precision moulding.
For reaching above-mentioned purpose, the technical scheme that the present invention takes is following:
A kind of optical lens module has the lens barrel of tubular, and it has the peristome of both end sides; Plastic lens, it is taken in and is configured in this lens barrel; Above-mentioned plastic lens has the edge part and the lens section that are positioned on the excircle, with the outer circumference surface of the above-mentioned edge part circular conical surface as circular cone (taper) shape, makes inner peripheral surface and the above-mentioned circular conical surface of the above-mentioned lens barrel vertical plane with line contact condition butt.
When packing into plastic lens in the lens barrel, the circular conical surface of the edge part excircle of plastic lens is connected to the vertical inner peripheral surface of lens barrel with the line contact condition, and lens barrel and plastic lens are accurately located with concentric mode.
In above-mentioned lens barrel, take in a plurality of plastic lenss of configuration, the face that overlaps separately at these plastic lenss forms the circular conical surface that can engage mutually respectively.
Make the circular conical surface that on the excircle of the edge part of the plastic lens that inserts lens barrel at first, forms be connected to the vertical inner peripheral surface of lens barrel with the line contact condition; Lens barrel and plastic lens are at the state with concentric shape location; Insert the plastic lens of next section successively; Each circular conical surface engaging through forming on the coincidence face that makes each plastic lens as benchmark, can make the optical axis of all plastic lenss that are accommodated in the lens barrel become unanimity with the plastic lens after locating with respect to lens barrel.
Above-mentioned plastic lens molding mould has fixed mould; Moveable die, but it is set to respect to this fixed mould folding; And the mould abaculus, it is releasably installed on said fixing mould and moveable die, utilizes above-mentioned mould abaculus to form said lens portion and above-mentioned circular conical surface.
Because the lens section and the circular conical surface of plastic lens are one-body molded with the mould abaculus; Can be owing to generation skew between lens section and the circular conical surface is caused in the gap between mould abaculus and moveable die and the fixed mould; Can be all the time the dimensional accuracy of lens section and circular conical surface be remained high precision; Consequently, can the optical axis of lens barrel and the optical axis of plastic lens be consistent with high precision.
A kind of manufacturing approach of plastic lens is used above-mentioned plastic lens molding mould, and potting resin in the cavity that is surrounded by said fixing mould and moveable die and mould abaculus is with above-mentioned plastic lens injection mo(u)lding.
According to the manufacturing approach of above-mentioned plastic lens, can make the plastic lens that keeps the dimensional accuracy of lens section and circular conical surface all the time accurately low-cost and in large quantities, can reduce the manufacturing cost of plastic lens.
Owing to adopted above-mentioned technology; Compared with prior art, according to the present invention, through with the mould abaculus moulding of the lens section of plastic lens and circular conical surface with mould; The dimensional accuracy that can keep lens section and circular conical surface all the time accurately; When lens barrel is packed plastic lens into, the circular conical surface through making plastic lens and the circular cone continuing surface of lens barrel are chimeric, can accurately locate with concentric mode with lens barrel and plastic lens.
In addition; Make the circular cone continuing surface of circular conical surface and lens barrel of the plastic lens that inserts lens barrel at first chimeric, the plastic lens that inserts is at first positioned with respect to lens barrel, with this state; With this plastic lens as benchmark; Insert the plastic lens of next section successively, engage respectively, can make the optical axis of all plastic lenss that are accommodated in the lens barrel become unanimity through making the circular conical surface that forms on these plastic lenss coincidence face separately.
Further specify the present invention below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 is the sectional view of the optical lens of embodiment;
Fig. 2 is the sectional view of the plastic lens of embodiment with mould;
Fig. 3 is the sectional view of existing optical lens;
Fig. 4 is the structurally improved sectional view of the locating structure of lens barrel and plastic lens;
Fig. 5 is the sectional view of existing plastic lens with mould.
Label declaration
1 plastic lens
2 lens sections
3 edge parts
5,15 circular conical surfaces
20 moulds
21 fixed moulds
22 moveable dies
23,24 mould abaculus
The K lens barrel
T2 circular cone continuing surface
Embodiment
Further specify the embodiment of invention below in conjunction with accompanying drawing 1:
Fig. 1 shows the sectional view of the optical lens of embodiment of the present invention, and the embodiment shown in Fig. 1 has omitted the part that repeats with example in the past shown in Fig. 3, Fig. 5, only different piece has been carried out label declaration.
Among Fig. 1, plastic lens 1 by lens section 2, and is formed from the edge part 3 that the outside circumferencial direction of the peripheral part of this lens section 2 extends.The outer circumference surface of portion 3 and a top side have formed cone shape circular conical surface 15 and 5 respectively on the edge of.The circular conical surface 15 that forms on the outer circumference surface of this edge part 3, along a top side towards a following side, to tilt near the direction of optical axis S coniform on form.In addition; Take in the lens barrel K of plastic lens 1; Vertical inner peripheral surface is formed; When in lens barrel K, packing plastic lens 1 into, the upper end of the circular conical surface 15 that forms on the outer circumference surface of the edge part 3 of plastic lens 1 is fastened on the inner peripheral surface of vertical lens barrel K with the line contact condition, makes lens barrel K concentric with plastic lens 1.In addition; Identical with improvement project shown in Figure 4; When in lens barrel K, packing plastic lens 1, plastic lens R2...... into; Be embedded on the circular conical surface T of the 2nd plastic lens R2 through making, can make the optical axis of lens barrel consistent with the optical axis high precision of each lens R1, R2...... at the circular conical surface 5 that forms above the plastic lens 1.
Among Fig. 2, the mould 20 of above-mentioned plastic lens 1 is by fixed mould 21, moveable die 22 and be installed in this fixed mould 21 and form with a pair of mould abaculus 23,24 up and down of moveable die 22.Fixed mould 21 and moveable die 22; Optical axis direction along plastic lens 1 moves up and down; Carry out folding operation, this fixed mould 21 carries out matched moulds with moveable die 22, to by this fixed mould 21 and moveable die 22; And fill molten resin in the cavity that surrounded of the mould abaculus 23,24 that is installed in each mould 21,22, with plastic lens 1 injection mo(u)lding.In addition, the lens face of the top of the lens section 2 of plastic lens 1 and circular conical surface 5 is one-body molded through above-mentioned mould abaculus 23, and it is one-body molded that the lens face of the below of the lens section 2 of plastic lens 1 and circular conical surface 15 pass through mould abaculus 24.
Promptly; In the mould 20 of the plastic lens 1 that the present invention relates to; The lens face of the top of the lens section 2 of the optical property of decision plastic lens 1 and the circular conical surface 5 of plastic lens 1 are one-body molded through the mould abaculus 23 that is installed in the moveable die 22, and the lens face of the below of the lens section 2 of plastic lens 1 and the circular conical surface 15 of plastic lens 1 are one-body molded through the mould abaculus 24 that is installed in the fixed mould 21.In example (Fig. 5) in the past, exist because fixed mould 21, moveable die 22 and the gap of 23,24 generations of mould abaculus separately, and cause lens section 2 and circular conical surface 5,15 to produce the worry of the forming errors that is called skew diametrically.But through mold structure of the present invention, because of the lens face of a movable side and the lens face and the circular conical surface 15 thereof of a circular conical surface 5 and a fixing side thereof are integrally formed, so can improve the positional precision of lens section 2 and circular conical surface.In addition; Mould abaculus 23,24 can freely load and unload on fixed mould 21 and moveable die 22; After the moulding, even do not meet under the situation of design load, because the change ratio of the shape of mould abaculus 23,24 is easier in the shrinkage factor of the lens section 2 through 23,24 moulding of mould abaculus; Therefore the face shape of the lens section after the moulding 2 is made amendment, processed or the diameter of circular conical surface is made amendment, processes also than is easier to, thereby make it near design load.
For this embodiment of above-mentioned formation, lens section 2 passes through 23,24 moulding of mould abaculus with the circular conical surface that is connected with this lens section 2 15,5, thereby can make lens section 2 and circular conical surface 15,5 become concentric and consistent accurately.As above-mentioned; Through guaranteeing the formed precision of circular conical surface 15,5; When packing plastic lens 1 in the lens barrel K into; Through the circular conical surface 15 that is formed at plastic lens 1 exterior side is engaged on the vertical inner peripheral surface of lens barrel K with the line contact condition, thereby lens barrel K and plastic lens 1 can accurately be located with concentric.In addition; With the plastic lens 1 that is arranged on lens barrel K as benchmark; Through being fitted to the circular conical surface of the plastic lens of next section the circular conical surface 5 of this plastic lens 1 successively, when packing a plurality of plastic lens 1...... in the lens barrel K into, can be under the state of the optical axis between unified each lens; Carry out modularization, take in and be configured among the lens barrel K.
In addition, form the lens section 2 of plastic lens 1 and the mould abaculus 23,24 of circular conical surface 15,5, can on fixed mould 21 and moveable die 22, freely load and unload; When the aspherical shape of change mould abaculus 23,24, can study for a second time courses one has flunked processing easily, and then; In this embodiment; Through the inner peripheral surface of lens barrel K is made vertical plane, simplify the shape of lens barrel K, it is easy that the processing and forming of lens barrel K also becomes.
More than embodiment of the present invention is specified, but the invention is not restricted to above-mentioned embodiment, the embodiment of various distortion can be arranged in purport scope of the present invention.For example, the shape of the shape of each lens or the circular conical surface that overlaps with each lens axis, perhaps, the sheet number of the lens in the lens barrel of packing into can be 1, also can tackle in the instrument of the different optical lenses of packing into, the sheet number of the lens in the lens barrel of suitably selecting to pack into.In addition, the mold structure of the mould of forming optical lens also is not limited to above-mentioned embodiment, can suitably select.
Claims (4)
1. optical lens module, it is characterized in that: have the lens barrel of tubular, it has the peristome of both end sides; Plastic lens, it is taken in and is configured in this lens barrel; Above-mentioned plastic lens has the edge part and the lens section that are positioned on the excircle, as cone shape circular conical surface, makes inner peripheral surface and the above-mentioned circular conical surface of the above-mentioned lens barrel vertical plane with line contact condition butt with the outer circumference surface of above-mentioned edge part.
2. the optical lens module above-mentioned like claim 1 is characterized in that: in above-mentioned lens barrel, take in a plurality of plastic lenss of configuration, on the coincidence face of this each plastic lens, form the circular conical surface that can engage each other respectively.
3. a plastic lens molding mould is used to form the plastic lens above-mentioned like claim 1, it is characterized in that: have fixed mould; Moveable die, but its be set to respect to this fixed mould folding, and mould abaculus, it is releasably installed on said fixing mould and moveable die, utilizes above-mentioned mould abaculus to form said lens portion and above-mentioned circular conical surface.
4. the manufacturing approach of a plastic lens adopts the plastic lens molding mould above-mentioned like claim 3, it is characterized in that: potting resin in the cavity that is surrounded by said fixing mould and moveable die and mould abaculus, and with above-mentioned plastic lens injection mo(u)lding.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-158587 | 2010-07-13 | ||
| JP2010158587A JP2012022074A (en) | 2010-07-13 | 2010-07-13 | Optical lens unit, molding die for plastic lens of the unit, and method for manufacturing plastic lens |
| JP2011011007 | 2011-01-21 | ||
| JP2011-011007 | 2011-01-21 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110074773.0 Division | 2011-03-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102375203A true CN102375203A (en) | 2012-03-14 |
Family
ID=45794064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103056715A Pending CN102375203A (en) | 2010-07-13 | 2011-03-16 | Optical lens unit, plastic lens forming mold and plastic lens manufacturing method therefor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102375203A (en) |
| TW (1) | TWI437304B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104516081A (en) * | 2013-09-30 | 2015-04-15 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN105093361A (en) * | 2014-05-12 | 2015-11-25 | 三星电机株式会社 | Lens and lens module comprising lens |
| CN106997083A (en) * | 2017-06-12 | 2017-08-01 | 浙江舜宇光学有限公司 | Camera lens and the camera module comprising the camera lens |
| CN110837165A (en) * | 2018-08-16 | 2020-02-25 | 宁波舜宇车载光学技术有限公司 | Optical lens and assembling method thereof |
| CN115128758A (en) * | 2021-03-12 | 2022-09-30 | 株式会社理光 | Lens assembly, stereo camera, and moving object |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI463205B (en) * | 2013-09-30 | 2014-12-01 | 玉晶光電股份有限公司 | Optical imaging lens |
| CN104678463A (en) | 2013-11-28 | 2015-06-03 | 玉晶光电(厦门)有限公司 | Optical lens, mold for manufacturing lens and manufacturing method |
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| CN1508587A (en) * | 2002-12-18 | 2004-06-30 | �����ɷ� | Mosaic lens in optical system |
| JP2004302157A (en) * | 2003-03-31 | 2004-10-28 | Hitachi Maxell Ltd | Doublet |
| CN1796317A (en) * | 2004-12-21 | 2006-07-05 | 亚洲光学股份有限公司 | Jetting out forming die of making rough convex not influence on assembly of finished product |
| CN101111791A (en) * | 2005-01-28 | 2008-01-23 | 伊斯曼柯达公司 | Passively aligned optical elements |
| US20090015945A1 (en) * | 2007-07-13 | 2009-01-15 | Yi-Jen Chen | Lens unit provided with an engaging structure and a lens module incorporating the same |
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- 2011-03-16 CN CN2011103056715A patent/CN102375203A/en active Pending
- 2011-04-08 TW TW100112136A patent/TWI437304B/en active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508587A (en) * | 2002-12-18 | 2004-06-30 | �����ɷ� | Mosaic lens in optical system |
| JP2004302157A (en) * | 2003-03-31 | 2004-10-28 | Hitachi Maxell Ltd | Doublet |
| CN1796317A (en) * | 2004-12-21 | 2006-07-05 | 亚洲光学股份有限公司 | Jetting out forming die of making rough convex not influence on assembly of finished product |
| CN101111791A (en) * | 2005-01-28 | 2008-01-23 | 伊斯曼柯达公司 | Passively aligned optical elements |
| US20090015945A1 (en) * | 2007-07-13 | 2009-01-15 | Yi-Jen Chen | Lens unit provided with an engaging structure and a lens module incorporating the same |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104516081A (en) * | 2013-09-30 | 2015-04-15 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN105093361A (en) * | 2014-05-12 | 2015-11-25 | 三星电机株式会社 | Lens and lens module comprising lens |
| CN106997083A (en) * | 2017-06-12 | 2017-08-01 | 浙江舜宇光学有限公司 | Camera lens and the camera module comprising the camera lens |
| CN110837165A (en) * | 2018-08-16 | 2020-02-25 | 宁波舜宇车载光学技术有限公司 | Optical lens and assembling method thereof |
| CN115128758A (en) * | 2021-03-12 | 2022-09-30 | 株式会社理光 | Lens assembly, stereo camera, and moving object |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI437304B (en) | 2014-05-11 |
| TW201202779A (en) | 2012-01-16 |
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Application publication date: 20120314 |