CN102053330A - Lens module and shooting unit - Google Patents
Lens module and shooting unit Download PDFInfo
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- CN102053330A CN102053330A CN2010105438546A CN201010543854A CN102053330A CN 102053330 A CN102053330 A CN 102053330A CN 2010105438546 A CN2010105438546 A CN 2010105438546A CN 201010543854 A CN201010543854 A CN 201010543854A CN 102053330 A CN102053330 A CN 102053330A
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- lens
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Abstract
The invention provides a lens module and a shooting unit, which is simple in structure.According to the invention, even when an expansion is generated during a backflow process, the resolving power is prevented from being reduced.The lens module comprises at least one lens for the transmission of visible light and a lens barrel (2) for accommodating the lens.An optical diaphragm (32) and a shading diaphragm (34) are arranged on any one of the lens.The lens barrel (20) is equipped with a trunk part (21) and an opening part (22a) for the injection of visible light for the lens. The lens is accommodated inside the trunk part (21).A gap is arranged between the outside of the lens and the inner side of the trunk part (21) of the lens barrel (20).The opening diameter (D) of the opening part (22a) is greater than the diameter of one of the optical diaphragm (32) and the shading diaphragm (34) closer to the light-incident-side of thoptical light.
Description
Technical field
The present invention relates to lens module and image unit.
Background technology
Always, in employed image units such as mobile phone and monitoring camera, the structure that is adopted is to make the camera small modular of making a video recording and directly engage with circuit substrate.Charge-coupled image sensor) and CMOS (Complementary Metal Oxide Semiconductor: the combined structure of lens module of image sensor and shooting usefulness such as complementary metal oxide semiconductor (CMOS)) this image unit generally is to make CCD (Charge Coupled Device:.Lens module is the structure that one or more lens are installed in the inside of lens barrel.
When making image unit, simplify in order to make technology, require under the state that is equipped with lens module on the circuit substrate, to use the reflow process of scolder etc. to be carried out.Reflow process is to expose the operation of several seconds to tens of seconds time under the environment of the high temperature of 200 ℃ (being generally 250 ℃～270 ℃) to the open air.High temperature when making it tolerate to such an extent that live reflow process, as patent documentation 1, need make the lens that constitute lens module and the material of lens barrel is the thermotolerance material.
[look-ahead technique document]
[patent documentation]
[patent documentation 1] spy opens the 2009-53528 communique
But,,, cause the difference that generation is caused by thermal expansion between the lens and lens barrel when following of reflux temperature exposes to the open air because the linear expansion coefficient of lens and lens barrel has nothing in common with each other even lens module is formed by the thermotolerance material that can tolerate reflux temperature.In the lens module, though be located at the stop position of lens barrel and the optical axis position of lens mates in position, because thermal expansion causes the position relation of lens and lens barrel to be offset.So even normal temperature is recovered in the heating back, the position relation of lens and lens barrel still is in the state of dislocation and can not restores, with regard to the problem that has resolution to reduce.
In patent documentation 1, between the external diameter of the internal diameter of lens barrel metastomium and lens, the gap is set, the influence of the thermal expansion when suppressing to reflux.In addition, between mirror trunk and lens, form the centering machine structure that constitutes by recess and protuberance, to guarantee the positional precision of lens barrel and lens.But, because recess and protuberance are set on lens barrel and lens, the complexity so its shape separately becomes.In addition, when forming the centering machine tool, need be with high-precision processing, and such processing is difficult.
Constituting of patent documentation 1 disposed adapter ring between first lens and second lens, this adapter ring plays a role as diaphragm, and when hypothesis made the function of adapter ring performance shading diaphragm, the diaphragm with optical diaphragm function just became the peristome of lens barrel.But, if lens barrel and lens generation thermal expansion when reflow process,, cause the existence of deceiving of resolution reductions then at the optical axis of lens be equivalent to occurrence positions skew between the optical diaphragm of peristome of lens barrel.
Summary of the invention
Also can prevent lens module and the image unit that resolution reduces even the invention provides a kind of its simple in structure when reflow process, produce expansion.
The present invention is a kind of lens module, has at least one lens and the lens barrel of accommodating described lens of transmission visible light, wherein,
Described lens module has:
Be located at the optical diaphragm on any of described lens;
Be located at the shading diaphragm on any of described lens,
Described lens barrel has: described lens is contained in inner lens barrel metastomium and is used for peristome to described lens incident visible light,
Between the medial surface of the described lens barrel metastomium of the lateral surface of described lens and described lens barrel, the gap is set,
The diaphragm of opening among described optical diaphragm of relative aperture and the described shading diaphragm with the approaching side of light incident side at least of described peristome is big.
According to the lens module of this example structure, utilize the gap between lens and lens barrel metastomium, even lens generation thermal expansion under hot environment during reflow process also can prevent the distortion of lens and lens barrel and the breakage of lens.At this moment, if lens to gap one side thermal expansion take place, then lens may be offset a little with respect to the position of lens barrel.But optical diaphragm and shading diaphragm all are not set up in the lens side in the lens barrel side, so lens and diaphragm can not misplace.Therefore, can prevent that resolution from reducing.
According to the present invention, a kind of lens module and image unit can be provided, it is simple in structure, even the reduction that thermal expansion also can prevent resolution takes place when reflow process.
Description of drawings
Fig. 1 is the sectional view of image unit.
Fig. 2 is the figure of the relation of expression effective diameter of lens and light face diameter.
Fig. 3 is another routine sectional view of image unit.
Symbol description
1 image unit
20 lens barrels
32 optical diaphragms
34 shading diaphragms
L1, L2, L lens
The LM lens module
Embodiment
Below, explain embodiments of the present invention based on accompanying drawing.
Fig. 1 is the sectional view of image unit.Image unit 1 has lens module LM and sensor base plate B.Lens module LM is engaged with on the sensor base plate B.Among Fig. 1, light is carried out incident with respect to lens module LM upside from figure.
Lens module LM has 2 lens L1, L2 of transmission visible light and the lens barrel 20 of accommodating these lens L1, L2.Lens barrel 20 is made of the material that visible light is had light-proofness.The optical axis of lens L1, L2 is represented by dot-and-dash line among the figure.
Lens L1, L2 are to be central circular with the optical axis under the state that optical axis direction is watched, and the diameter of lens L1, L2 is identical.Lens L1, L2 have thickness in the direction of optical axis, will with this thickness institute corresponding face as lateral surface.
With regard to sensor base plate B, be formed with solid-state imager S at the face of the light incident side of this sensor base plate B.Sensor base plate B for example with by the formed wafer of semiconductor materials such as silicon to cut and to form overlooking the essentially rectangular shape.Solid-state imager S is provided with in the substantial middle portion of sensor base plate B.
Solid-state imager S is for example ccd image sensor and mos image sensor.Sensor base plate B can be the structure that is pasted with by the solid-state imager of chipization.In addition, with regard to solid-state imager, add operation etc. and on this sensor base plate B, form electrode, dielectric film, wiring and wait to constitute and also can by sensor base plate B being repeated known film formation process, photo-mask process, etching procedure, impurity.
Among the lens L1, be formed with lens face 11a, 11b respectively with set shape at the face of light incident side and the face of sensor base plate side.The lens face 11a of the light incident side of lens L1 forms convex, is that the lens face 11b of opposite offside forms concavity with respect to the light incident side of lens L1.
Equally, lens L2 is formed with respectively at the face of the face of light incident side and sensor base plate side and has lens face 12a, the 12b that both had been shaped as.The lens face 12a of the light incident side of lens L2 forms concavity, is that the lens face 12b of opposite offside forms convex with respect to the light incident side of lens L2.
The face with the opposite offside of light incident side at lens L1 is provided with fitting portion 14.In addition, the face at the light incident side of lens L2 is provided with fitting portion 16.Fitting portion 14 by making lens L1 and the fitting portion 16 of lens L2 are directly chimeric, and lens L1 and lens L2 are located in the mode that separately optical axis is consistent.
In the inside of lens barrel 20, be provided with circular binding 24.In the binding 24, the medial surface 21a of its outer peripheral face and lens barrel metastomium 21 is chimeric.Binding 24 and the step portion butt of being located at the medial surface 21a of lens barrel metastomium 21, and will be in the stationkeeping with respect to the direction of optical axis of the inside of lens barrel metastomium 21.In addition, the face butt of binding 24 and the opposite offside of the light incident side of lens L2, will with the chimeric lens L1 of lens L2 by on the lens barrel end 22 that is pressed in lens barrel 20.So, lens L1, L2 are kept in the mode of its invariant position of direction of optical axis according to the inside at lens barrel metastomium 21.
In the inside of lens barrel 20, be provided with the gap between outside the outside of the medial surface 21a of lens barrel metastomium 21 and lens L1, lens L2.
Then, the material for lens describes.
As the material of lens, the preferred material that uses with heat resisting temperature higher than the heating-up temperature of reflow process.Material as lens can use resin.The process of resin excellence is fit to simple and easy and form lens face at an easy rate by mould etc.The resin that is used for lens material preferably has the heat resisting temperature higher than the heating-up temperature of reflow process, and uv-hardening resin, thermosetting resin all can use.If consider the reflow process of above-mentioned image unit, then preferred softening point for example is that the ratio more than 200 ℃ is higher, more preferably more than 250 ℃.
As the employed resin of the material of lens, can illustration epoxy resin, acryl resin, silica resin, polysulfone resin etc.
In addition, as the material of lens, also can use glass.
As the material of lens barrel, preferred use has light-proofness for visible light and has the material of the heat resisting temperature higher than the heating-up temperature of reflow process.As the material of lens barrel, can use silicon, metal, resin (uv-hardening resin, thermosetting resin).As resin, can the illustration liquid crystal polymer, epoxy resin, olefin(e) acid resin, silica resin, polysulfone resin etc.
Then, describe for optical diaphragm set on lens module LM and shading diaphragm.
Optical diaphragm is the diaphragm with function of restriction luminous flux of incident light and light quantity.The shading diaphragm is the diaphragm with the function that prevents parasitic light.
Face at the light incident side of lens L1 is provided with optical diaphragm 32.Lens L1, L2 are that the flange of lens face and the periphery that is formed at this lens face constitutes by the optical function face respectively.
Fig. 2 is the figure of the relation of expression effective diameter of lens and light face diameter.As shown in Figure 2, in order to ensure the surface accuracy in the excellence of effective diameter, lens have the light face diameter bigger than effective diameter.That is, when forming lens, form according to light face diameter than the bigger designed lens face of mode in footpath is effectively arranged, to guarantee the precision of effective diameter.Optical diaphragm is formed at the effective diameter part in addition of lens.With reference to Fig. 1, the optical diaphragm 32 of being located at lens 1 is formed on effective diameter part in addition, and the peristome of this optical diaphragm 32 is equivalent to effective diameter.
As the method that optical diaphragm 32 is set, for example can form the back and form by black printing at lens.Perhaps by when forming lens, will inserting moulding, become one with lens shaped and also can by the board member that the metal of black etc. constitutes.
As shown in Figure 1, between lens L1 and lens L2, be formed with shading diaphragm 34.Be formed with peristome at shading diaphragm 34, the center of the opening footpath d2 of the peristome of shading diaphragm 34 is identical with the center of the opening footpath d1 of the peristome of optical diaphragm 32.Also have, shading diaphragm 34 forms by the method identical with optical diaphragm 32 also can.
The opening footpath D of peristome 22a that is located at lens barrel end 22 is bigger than the opening footpath d1 of the peristome of the optical diaphragm 32 of lens L1.That is, the peristome 22a that is located at lens barrel end 22 does not have the function as diaphragm, and it is merely in order to make light formed to lens L1, L2 incident.
Lens module LM according to this structure of this example utilizes the gap between these lens L1, L2 and the lens barrel metastomium 21, even under hot environment thermal expansion takes place during reflow process, also can prevent the distortion of lens and lens barrel and the breakage of lens.At this moment, if lens to gap one side thermal expansion take place, then lens may be offset a little with respect to the position of lens barrel.But because optical diaphragm and shading diaphragm all be not set up in lens L1, L2 side in lens barrel 20 sides, so lens L1, L2 and diaphragm can not misplace.Therefore, resolution can not reduce.With regard to lens barrel 20, by estimating the amount of the offset of lens barrel 20 and lens L1, L2 under the effect of gap, design the opening footpath D of the peristome 22a of lens barrel end 22 greatly, just can guarantee the luminous flux of needs.
In last example, also shading diaphragm 34 can be set at the light incident side of lens L1, between lens L1 and lens L2, optical diaphragm 32 is set.Promptly, no matter optical diaphragm 32 and shading diaphragm 34 are located at the face of which side of which lens respectively, if constitute lens barrel end 22 peristome 22a opening footpath D than among optical diaphragm 32 and the shading diaphragm 34 at least with the diaphragm of the approaching side of light incident side greatly.
In last example, though lens module LM is the structure of accommodating 2 lens L1, L2 in lens barrel 20, the quantity of lens is not limited, and can be more than 3 yet.
In addition, lens module LM is example as described later, also can be that single lens are housed in structure in the lens barrel.
Fig. 3 is another routine sectional view of expression image unit.
The image unit 1 of Fig. 3 point different with the example of Fig. 1 is that lens module LM has single lens L.Also have, other structural elements in the image unit 1, the example with Fig. 1 is identical basically, therefore suits with reference to identical reference numbering simple or omission explanation.
In this embodiment, the face at the light incident side of lens L is provided with optical diaphragm 32.Face at the opposite offside of the light incident side of lens L is provided with shading diaphragm 34.Optical diaphragm 32 can form with the identical method of above-mentioned example with shading diaphragm 34.
In this image unit 1, with regard to the peristome 22a of lens barrel end 22, its opening footpath D is bigger than the opening footpath d1 of the peristome of the optical diaphragm 32 of the light incident side of being located at lens L.
In the structure of Fig. 3, also can be that the face at the light incident side of lens L is provided with shading diaphragm 34, the structure of optical diaphragm 32 is set at the opposite offside of light incident side.In such structure, as long as the opening footpath D that makes lens barrel 20 than the opening footpath d2 of the peristome of shading diaphragm 34 greatly.
According to this routine image unit 1, lens 1 and diaphragm can not misplace, and can prevent that therefore resolution from reducing.By the opening footpath D of the peristome 22a of lens barrel 20 is designed, can guarantee the luminous flux that needs under the suitable gap of considering lens L and lens barrel 20.
The open following item of this specification.
(1) a kind of lens module, at least one lens and the lens barrel of accommodating described lens with transmission visible light, wherein, described lens module has:
Be located at the optical diaphragm on any of described lens;
Be located at the shading diaphragm on any of described lens,
Described lens barrel has: described lens is contained in inner lens barrel metastomium and is used for peristome to described lens incident visible light,
Between the medial surface of the described lens barrel metastomium of the lateral surface of described lens and described mirror metastomium, be provided with the gap,
At least diaphragm with the approaching side of light incident side of opening among the described optical diaphragm of relative aperture and the described shading diaphragm of described peristome is big.
(2) according to (1) described lens module, wherein,
A plurality of described lens are housed in described lens barrel metastomium, a plurality of described lens optical axis separately is identical, among a plurality of described lens and the planes of incidence hithermost lens of described peristome, side among described optical diaphragm and the described shading diaphragm is set, and, the opposing party among described optical diaphragm and the described shading diaphragm is arranged at a plurality of described lens each other.
(3) according to above-mentioned (1) or (2) described lens module, wherein,
Described lens and described lens barrel consist of by the material with heat resisting temperature higher than the heating-up temperature of reflow process.
(4) according to each described lens module in above-mentioned (1)～(4), wherein,
Described lens and described lens barrel are made of resin material.
(5) a kind of image unit has each described lens module in above-mentioned (1)～(4), wherein,
This image unit has: engage the sensor base plate that described lens module is arranged.
Claims (5)
1. lens module has at least one lens of transmission visible light and accommodates the lens barrel of described lens, wherein,
Described lens module has:
Be located at the optical diaphragm on any of described lens; With
Be located at the shading diaphragm on any of described lens,
Described lens barrel has:
Described lens are contained in inner lens barrel metastomium; With
Be used for peristome to described lens incident visible light,
Between the medial surface of the described lens barrel metastomium of the lateral surface of described lens and described lens barrel, the gap is set,
The diaphragm of opening among described optical diaphragm of relative aperture and the described shading diaphragm with the approaching side of light incident side at least of described peristome is big.
2. lens module according to claim 1, wherein,
A plurality of described lens are housed in described lens barrel metastomium, a plurality of described lens optical axis separately is identical, among a plurality of described lens and the planes of incidence immediate lens of described peristome, side among described optical diaphragm and the described shading diaphragm is set, and, the opposing party among described optical diaphragm and the described shading diaphragm is arranged at a plurality of described lens each other.
3. lens module according to claim 1 and 2, wherein,
Described lens and described lens barrel constitute by the material with heat resisting temperature higher than the heating-up temperature of reflow process.
4. lens module according to claim 1 and 2, wherein,
Described lens and described lens barrel are made of resin material.
5. an image unit has each described lens module in the claim 1～4, wherein,
This image unit has: engage the sensor base plate that described lens module is arranged.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009256086A JP2011100056A (en) | 2009-11-09 | 2009-11-09 | Lens module and imaging unit |
| JP2009-256086 | 2009-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102053330A true CN102053330A (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105438546A Pending CN102053330A (en) | 2009-11-09 | 2010-11-09 | Lens module and shooting unit |
Country Status (2)
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|---|---|
| JP (1) | JP2011100056A (en) |
| CN (1) | CN102053330A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103376481A (en) * | 2012-04-25 | 2013-10-30 | 全球微型光学有限公司 | Optical lens and method for manufacturing optical lens |
| CN105549173A (en) * | 2016-01-28 | 2016-05-04 | 宁波舜宇光电信息有限公司 | Optical lens, camera module group and assembly method thereof |
| CN106199893A (en) * | 2015-04-27 | 2016-12-07 | 大立光电股份有限公司 | Optical lens and electronic installation |
| CN109839734A (en) * | 2017-11-27 | 2019-06-04 | 汉克沙斯伍夫公司 | Optical arrangement for endoscope and the endoscope with the optical arrangement |
| CN110086963A (en) * | 2018-01-25 | 2019-08-02 | 台湾东电化股份有限公司 | Camera system |
| CN110196478A (en) * | 2019-06-10 | 2019-09-03 | Oppo广东移动通信有限公司 | Camera lens, camera mould group and electronic device |
| CN110261981A (en) * | 2019-06-10 | 2019-09-20 | Oppo广东移动通信有限公司 | Camera lens, camera mould group and electronic device |
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| CN103842144B (en) * | 2011-09-30 | 2015-08-12 | 富士胶片株式会社 | The manufacturing process of lens and lens |
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Cited By (10)
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| CN103376481A (en) * | 2012-04-25 | 2013-10-30 | 全球微型光学有限公司 | Optical lens and method for manufacturing optical lens |
| CN106199893A (en) * | 2015-04-27 | 2016-12-07 | 大立光电股份有限公司 | Optical lens and electronic installation |
| CN105549173A (en) * | 2016-01-28 | 2016-05-04 | 宁波舜宇光电信息有限公司 | Optical lens, camera module group and assembly method thereof |
| US11378722B2 (en) | 2016-01-28 | 2022-07-05 | Ningbo Sunny Opotech Co., Ltd. | Optical lens head, camera module and assembling method therefor |
| CN109839734A (en) * | 2017-11-27 | 2019-06-04 | 汉克沙斯伍夫公司 | Optical arrangement for endoscope and the endoscope with the optical arrangement |
| CN110086963A (en) * | 2018-01-25 | 2019-08-02 | 台湾东电化股份有限公司 | Camera system |
| CN110196478A (en) * | 2019-06-10 | 2019-09-03 | Oppo广东移动通信有限公司 | Camera lens, camera mould group and electronic device |
| CN110261981A (en) * | 2019-06-10 | 2019-09-20 | Oppo广东移动通信有限公司 | Camera lens, camera mould group and electronic device |
| CN110261981B (en) * | 2019-06-10 | 2021-09-10 | Oppo广东移动通信有限公司 | Lens, camera module and electronic device |
| CN110196478B (en) * | 2019-06-10 | 2022-03-22 | Oppo广东移动通信有限公司 | Lens, camera module and electronic device |
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Application publication date: 20110511 |