CN2706779Y - Vari-focal lens module - Google Patents

Vari-focal lens module Download PDF

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Publication number
CN2706779Y
CN2706779Y CN 200420044385 CN200420044385U CN2706779Y CN 2706779 Y CN2706779 Y CN 2706779Y CN 200420044385 CN200420044385 CN 200420044385 CN 200420044385 U CN200420044385 U CN 200420044385U CN 2706779 Y CN2706779 Y CN 2706779Y
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CN
China
Prior art keywords
lens
zoom
lens module
piezoelectric
module
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Expired - Lifetime
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CN 200420044385
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Chinese (zh)
Inventor
黄全德
黄文正
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to CN 200420044385 priority Critical patent/CN2706779Y/en
Application granted granted Critical
Publication of CN2706779Y publication Critical patent/CN2706779Y/en
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Abstract

The utility model provides a varifocal lens module, which can be positioned in the cell phone and the digital camera with a function for taking a picture. The varifocal lens module comprises a first lens and a plurality of piezoelectric elements and a lens barrel. The first lens is positioned in the lens barrel, and the piezoelectric elements are respectively positioned at the circumference of the first lens. The electric field controls the piezoelectric elements to generate deformation, and under the combined action of the lens barrel, the tension or the tension can be generated. Thus the first lens is deformed to change the curvature radius of the first lens in order to change the focal length of the lens. The focal length changing method does not need to change the position of the lens to economize the increased telescopic space, which is favorable for the cell phone and the digital camera to realize the light and small degree.

Description

The zoom lens module
[technical field]
The utility model refers to a kind of mobile phone of tool camera function and zoom lens module of digital camera of being applicable to especially about a kind of zoom lens module.
[background technology]
Along with Development of Multimedia Technology, digital camera is by people's widespread use, have the large market demand, and mobile phone develops to high-performance, multifunction direction fast also in recent years, digital camera becomes the key that develops the mobile multimedia technology with combining of mobile phone.The zoom mode of digital camera has two kinds, i.e. optical zoom and digital zoom: optical zoom is that the combination by eyeglass changes focal length to reach the purpose of zoom; And digital zoom is for being cut out image sensor institute picked image and being reduced into former figure size by interpolation algorithm.
The camera lens module is the mobile phone of tool camera function and the key part and component of digital camera, the camera lens module that utilizes optical zoom is in order to focus, need to change the distance between objective lens, aperture and the eyepiece group, so need a vertical extendable room, it takes up space bigger, increased the mobile phone of tool camera function or the thickness of digital camera, be unfavorable for that it develops towards light little direction.The consumer is more and more higher to the camera imaging quality requirements at present, and utilizes the camera lens module gained image quality of digital zoom relatively poor, can not adapt to market demands.
A kind of zoom lens, as be disclosed in No. the 02102560.6th, the Chinese patent on September 18th, 2002, thus it utilizes two groups of cam mechanisms to come the mobile lens group to reach the purpose of zoom.Wherein, first cam mechanism comprises rotor, cam pin, the first cam cylinder web joint, and the outside surface of rotor is provided with circumferential rib, has the spiral prominence race on the first cam cylinder; Second cam mechanism comprises the second cam cylinder, and the second cam cylinder comprises two spiral channels and two longitudinal channels again; Cam mechanism is used for realizing rotation is transformed into translation, thus rotating cam mechanism can the scioptics group with cooperating of spiral prominence race make lens combination on the cam cylinder along the optical axis direction translation, thereby the realization zoom.This Zoom structure that utilizes cam mechanism to come the mobile lens group, owing to need to change the distance between the lens combination, so lens module size certainly will be bigger, and this cam mechanism structure is comparatively complicated, spiral channel processing on each cylinder is difficulty comparatively, cause its manufacturing cost higher, simultaneously, machinery moves also the shortcoming unreliable, that precision is relatively poor.
Existing zoom lens, in disclosed zoom lens on Dec 11st, 2003, it utilizes the piezoelectric material deforms drive lens to move and realizes zoom as U.S. Patent application US20030227599 number.These zoom lens comprise a movable sleeve, a fixed muffle, piezoelectric and a series of other accessory structures, and element is more, and the structure of its piezoelectric and processing procedure are complicated, have increased manufacturing cost; This invention needs the zoom by changing lens position, so need a vertical extendable room, institute takes up space bigger, has increased the mobile phone of tool camera function and the size of digital camera, is unfavorable for that it develops towards light little direction.
In view of above shortcoming, be necessary to provide that a kind of overall dimensions is less, structure is comparatively simple and imaging effect lens module preferably.
[summary of the invention]
The purpose of this utility model is to provide a kind of digital camera zoom lens module, and it can reduce the size of the mobile phone or the digital camera of tool camera function, and can obtain the better image effect.
A kind of digital camera zoom lens module can place in the mobile phone, and it comprises first lens, a plurality of piezoelectric element and a lens barrel, and this piezoelectric element comprises first electrode, second electrode and piezoelectric again.These first lens are the deformable transparent lens, make by the plasticity plastic material, piezoelectric element places on the circumference of these first lens, it can be any amount more than 3, deformation takes place by piezoelectric effect in the piezoelectric part of piezoelectric element under electric field action, produce pulling force or tension force simultaneously under the acting in conjunction of lens barrel, makes this first lens distortion, change its radius-of-curvature, thereby change its focal length.
Compare prior art, the utility model zoom lens module only comprises a plurality of lens, a plurality of piezoelectric and a lens barrel, and simple in structure, subsidiary component is less, and processing procedure is also simpler, so production cost is lower; In addition, the variation of the utility model radius-of-curvature of scioptics when zoom own changes its focal length, therefore need not change the distance between object lens, aperture and the picture mirror, thus can save its extendable room, thus reduce the volume of electronic product; The utility model lens module adopts optical zoom, and its image effect is better.
[description of drawings]
Fig. 1 is the structural representation of embodiment of the invention zoom lens module;
Fig. 2 is the II-II cut-open view of embodiment of the invention zoom lens modular structure.
[embodiment]
See also Fig. 1 and Fig. 2, the utility model zoom lens module comprises first lens 1, four piezoelectric elements 2, lens combination and lens barrels 4.These four piezoelectric elements 2 are uniformly distributed on the circumference of first lens 1, between the lens barrel and first lens.Lens combination 3 is positioned at after first lens 1, and its main shaft overlaps with the main shaft of first lens 1.First lens 1 and lens combination 3 place in the lens barrel 4, and contact with lens barrel 4 inwalls.First lens 1 are the deformable elastic lens, are made by the plastic with plasticity material, and its side view can be any among concave-convex lens, plano-convex lens, biconvex lens, meniscus, plano-concave lens and the biconcave lens etc., preferred plano-convex lens and plano-concave lens.
Piezoelectric element 2 comprises first electrode 21, piezoelectric 22 and second electrode 23, in the present embodiment, piezoelectric element 2 is a right cylinder, first electrode 21, second electrode 23 place the two ends of piezoelectric 22 respectively, but it can directly connect the direct supply of sign change, change both positive and negative polarity or supply voltage and can realize changing, thereby under the acting in conjunction of piezoelectric 22 and lens barrel 4, produce pulling force or tension force by electric field controls piezoelectric 22.The material of piezoelectric 22 can be the material of any tool piezoelectric property, preferred lead zirconate titanate (PZT[Pb (Zr, Ti) O 3]).Piezoelectric element 2 is to be sintered to one by piezoelectric 22 and first electrode 21 and second electrode 23 to form, piezoelectric element 2 is pasted on these first lens 1, it also can be when this first lens, 1 moulding, directly be bumped on the circumference of first lens 1, and piezoelectric element 2 is uniformly distributed on the circumference of first lens 1.
Lens combination 3 is for to be formed by a plurality of combination of lensess, and it comprises anamorphote and non-anamorphote, and its material is glass or plastics.
When using the zoom lens module, thereby by changing supply voltage or its positive and negative can piezoelectric element 2 generation stretch or compression by the change of shape of electric field controls piezoelectric 22 of conversion on first electrode 21, second electrode 23.Stretching or compression and lens barrel 4 actings in conjunction that this piezoelectric element 2 produces make first lens produce deformation, change the purpose that first lens, 1 radius-of-curvature changes whole lens module focal length thus thereby reach.Wherein the radius-of-curvature of these first lens 1 variation principle is as follows:
The lens imaging formula, 1/f=1/u+1/v.
Wherein u is an object distance, and v is an image distance.
The focal length of lens, f=(n-1) (1/r '-1/r ").
Wherein " be the radius-of-curvature on the first lens two sides, n is a refractive index, and is insensitive to radius-of-curvature because of refractive index n, changes so can ignore it, so change the radius-of-curvature of first lens 1, can realize the variation of first lens, 1 focal distance f, focuses thus for r ' and r.
When first lens are that plano-convex lens is that example illustrates that its focal length variations principle is as follows:
During stretching, " constant, r ' change is big, and then focal distance f becomes big for r.
When loosening, " constant, r's r ' diminishes, and then focal distance f diminishes.
Wherein r ' is the radius-of-curvature of plano-convex lens convex surface, r " is the radius-of-curvature on plano-convex lens plane.
The quantity that is appreciated that first lens 1 in the utility model zoom lens module is extensible for a plurality of, can increase the quantity of first lens 1 as required, thereby realizes the requirement of zoom on a large scale of digital camera.In addition, the shape of piezoelectric element 2 is not limited to right cylinder, and it also can be other shape such as square etc., and its quantity also can be not limited to 4, and it also can be other any number more than 3.
The utility model zoom lens module can place in the mobile phone and digital camera of tool camera function.

Claims (9)

1. zoom lens module, it comprises first lens and a lens barrel, these first lens place in the lens barrel, it is characterized in that: this zoom lens module also comprises a plurality of piezoelectric elements, these first lens are anamorphote, these a plurality of piezoelectric elements place respectively on the circumference of these first lens, between the lens barrel and first lens.
2. zoom lens module as claimed in claim 1 is characterized in that: these first lens are the plasticity elastomeric lenses.
3. zoom lens module as claimed in claim 2 is characterized in that: the material of these first lens is a plastic material.
4. zoom lens module as claimed in claim 1 is characterized in that: this piezoelectric element comprises piezoelectric and places first electrode, second electrode at piezoelectric two ends.
5. zoom lens module as claimed in claim 4 is characterized in that: the material of this piezoelectric is lead zirconate titanate (PZT[Pb (Zr, Ti) O 3]).
6. zoom lens module as claimed in claim 4 is characterized in that: this first electrode, second electrode are connected with direct supply.
7. zoom lens module as claimed in claim 1 is characterized in that: this piezoelectric element is at least 3, and is uniformly distributed on the circumference of first lens.
8. zoom lens module as claimed in claim 1 is characterized in that: this zoom lens module further comprises a lens combination, and described lens combination is made up of a plurality of lens.
9. zoom lens module as claimed in claim 8 is characterized in that: this lens combination comprises anamorphote and non-anamorphote.
CN 200420044385 2004-03-30 2004-03-30 Vari-focal lens module Expired - Lifetime CN2706779Y (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100489564C (en) * 2005-10-13 2009-05-20 鸿富锦精密工业(深圳)有限公司 Deformable optical lens and its manufacture method and manufacture apparatus
CN101517452B (en) * 2006-09-21 2011-06-01 珀莱特公司 Polymer lens
US8045280B2 (en) 2006-10-11 2011-10-25 Polight As Compact adjustable lens
CN101587224B (en) * 2008-05-21 2012-08-29 鸿富锦精密工业(深圳)有限公司 Lens module
US8310772B2 (en) 2008-07-11 2012-11-13 Polight As Method and arrangement for reducing thermal effects in compact adjustable optical lenses
US8390939B2 (en) 2007-02-12 2013-03-05 Polight As Flexible lens assembly with variable focal length
CN101661147B (en) * 2008-08-29 2013-03-20 鸿富锦精密工业(深圳)有限公司 Lens die set and camera die set using same
CN104049340A (en) * 2014-06-03 2014-09-17 联想(北京)有限公司 Camera lens, electronic device and zooming method
WO2018112883A1 (en) * 2016-12-23 2018-06-28 深圳市柔宇科技有限公司 Optical lens, camera module and terminal
CN109327580A (en) * 2018-11-26 2019-02-12 Oppo广东移动通信有限公司 Imaging modules and electronic device
CN109413307A (en) * 2018-09-29 2019-03-01 努比亚技术有限公司 A kind of camera module and terminal
CN110221416A (en) * 2019-06-28 2019-09-10 Oppo广东移动通信有限公司 Zoom lens, Zooming method, terminal and computer readable storage medium
CN110764262A (en) * 2019-10-08 2020-02-07 芯盟科技有限公司 Novel AR/VR glasses and method for adjusting novel AR/VR glasses

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100489564C (en) * 2005-10-13 2009-05-20 鸿富锦精密工业(深圳)有限公司 Deformable optical lens and its manufacture method and manufacture apparatus
CN101517452B (en) * 2006-09-21 2011-06-01 珀莱特公司 Polymer lens
US8199410B2 (en) 2006-09-21 2012-06-12 Polight As Polymer lens
US8045280B2 (en) 2006-10-11 2011-10-25 Polight As Compact adjustable lens
US8390939B2 (en) 2007-02-12 2013-03-05 Polight As Flexible lens assembly with variable focal length
CN101587224B (en) * 2008-05-21 2012-08-29 鸿富锦精密工业(深圳)有限公司 Lens module
US8310772B2 (en) 2008-07-11 2012-11-13 Polight As Method and arrangement for reducing thermal effects in compact adjustable optical lenses
CN101661147B (en) * 2008-08-29 2013-03-20 鸿富锦精密工业(深圳)有限公司 Lens die set and camera die set using same
CN104049340A (en) * 2014-06-03 2014-09-17 联想(北京)有限公司 Camera lens, electronic device and zooming method
WO2018112883A1 (en) * 2016-12-23 2018-06-28 深圳市柔宇科技有限公司 Optical lens, camera module and terminal
CN109413307A (en) * 2018-09-29 2019-03-01 努比亚技术有限公司 A kind of camera module and terminal
CN109327580A (en) * 2018-11-26 2019-02-12 Oppo广东移动通信有限公司 Imaging modules and electronic device
CN110221416A (en) * 2019-06-28 2019-09-10 Oppo广东移动通信有限公司 Zoom lens, Zooming method, terminal and computer readable storage medium
CN110764262A (en) * 2019-10-08 2020-02-07 芯盟科技有限公司 Novel AR/VR glasses and method for adjusting novel AR/VR glasses

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C17 Cessation of patent right
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Expiration termination date: 20140330

Granted publication date: 20050629