CN102004390B - Lens module detection system and detection method thereof - Google Patents

Lens module detection system and detection method thereof Download PDF

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Publication number
CN102004390B
CN102004390B CN200910306235.2A CN200910306235A CN102004390B CN 102004390 B CN102004390 B CN 102004390B CN 200910306235 A CN200910306235 A CN 200910306235A CN 102004390 B CN102004390 B CN 102004390B
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China
Prior art keywords
lens module
camera lens
recording device
light source
detecting system
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Expired - Fee Related
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CN200910306235.2A
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Chinese (zh)
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CN102004390A (en
Inventor
庄信弘
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Original Assignee
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Priority to CN200910306235.2A priority Critical patent/CN102004390B/en
Publication of CN102004390A publication Critical patent/CN102004390A/en
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Publication of CN102004390B publication Critical patent/CN102004390B/en
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Abstract

The invention relates to a lens module detection system. The detection system is used to detect the dip angle between a lens barrel and the movable barrel of a voice coil motor in the lens module. The detection system comprises a light source device and an analysis device, wherein the light source device contains a light source and a position recording device; the light source is used to emit a laser beam into the gap between the lens barrel and the movable barrel of the voice coil motor; the emitted laser beam is reflected to the position recording device by the outer side wall of the lens barrel, and a light spot is formed on the recording device; the position recording device records the position of the light spot; the analysis device is used to analyze whether the relative offset of the light spot to the laser beam sending position of the light source is in the an allowed error range; and the lens module detection system is utilized to detect the dip angle between the lens barrel and the voice coil motor in the lens module. Therefore, the product quality of the lens module can be increased.

Description

Camera lens module detecting system and detection method thereof
Technical field
The present invention relates to a kind of camera lens module detecting system and detection method thereof.
Background technology
In recent years, along with the development of optical articles, the range of application of camera lens module continue to enlarge, as digital camera, have the electronic products such as mobile phone of camera function.For electronic product, consumption electronic products particularly, its development trend is lightweight and slimming, relative set camera lens module in the inner also becomes more and more less, requirement to precision is also more and more higher, so the packaging technology of camera lens module also needs higher degree of accuracy and stability, to guarantee production efficiency and yield.Yet, in the process of assembling, may be because contraposition is inaccurate, or product tolerance, after the camera lens module screws in the movable cylinder of voice coil motor, can have more or less certain inclination angle between camera lens module and movable cylinder, however the size at this inclination angle be difficult to measure with conventional angle measurement unit, and whether the inclination angle could judge after must be through measurement within the error range that can allow.Make the focusing of camera lens module inaccurate if conference is crossed at described inclination angle, affected product quality.How to realize simply and easily the inclination angle detection between camera lens module and voice coil motor thus, become this area problem demanding prompt solution.
Summary of the invention
In view of this, be necessary to provide a kind of detection system and detection method thereof that can the detector lens module.
A kind of camera lens module detecting system, this detection system is for detection of the inclination angle between the movable cylinder of the lens barrel in the camera lens module and voice coil motor, and this detection system comprises:
One light supply apparatus comprises a light source and a position recording device, light source is used for giving off laser beam, and be radiated at gap between the movable cylinder of lens barrel and voice coil motor, this laser beam of sending reflexes to position recording device through the lateral wall of lens barrel, and form the hot spot point on this pen recorder, position recording device records this hot spot point position, calculates simultaneously this hot spot point and sends the distance of the position of light beam with described light source;
One analytical equipment be used for to be analyzed this hot spot point and light source and is sent the distance of position relativity shift of light beam whether in the error allowed band.
With respect to prior art, in described camera lens module, lens barrel and voice coil motor utilize above-mentioned camera lens module detecting system to carry out inclination angle detection, therefore, can improve the product quality of camera lens module.
Description of drawings
Fig. 1 is the camera lens module detecting system perspective view that embodiment of the present invention provides;
Fig. 2 is the working state schematic representation of the camera lens module detecting system in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See also Fig. 1, be the camera lens module detecting system 100 of embodiment of the present invention, it is for detection of the inclination angle of camera lens module 40.This camera lens module 40 comprises a voice coil motor 42 and a lens barrel 44.Described lens barrel 44 is sheathed in the movable cylinder 420 of voice coil motor 42.This camera lens module detecting system 100 comprises a bogey 10, a light supply apparatus 20, an analytical equipment 30.
Described bogey 10 comprises that a load bearing seat 12 and is used for driving the actuator 14 of load bearing seat 12 rotations.Described load bearing seat 10 offers the accepting groove 120 of a tetragonal body, its for detection of the time accommodate described camera lens module 40 to be detected.The shape that is appreciated that accepting groove 120 is not limited to square, and it should be decided with the shape of camera lens module to be detected.In present embodiment, described actuator 14 is a rotation motor, and it is used for driving described load bearing seat 10 rotations.
Usually be provided with the eyeglass (not shown) in lens barrel 44, so the optical axis of the camera lens module 40 in present embodiment is the central shaft of lens barrel 44.Described light supply apparatus 20 comprises a light source 22, a position recording device 23 and a bracing or strutting arrangement 24.Described light source 22 is a laser.Described position recording device 23 is adjoined setting mutually with described light source 22.Described bracing or strutting arrangement 24 is used for supporting described light source 22 and position recording device 23, so that light source 22 be positioned at camera lens module 40 an end and with the optical axis deviation certain distance of described camera lens module 40, and make light ray parallel that light source 22 sends in the central shaft of lens barrel 44.This position recording device 23 is used for record and is penetrated and be incident upon the position of the hot spot of the light on pen recorder 23 by described light source 22 after camera lens module 40 reflection to be detected.In present embodiment, the light beam of described light source 22 emissions just is radiated in gap between lens barrel 44 and voice coil motor 42 movable 420.Described position recording device 23 can be a light sensor, as charge-coupled image sensor (Charge CoupledDevice, CCD) etc.
Described analytical equipment 30 is electrically connected by a cable 35 and position recording device 23.In present embodiment, described analytical equipment 30 is a computer.
During use, the corresponding location coordinate on position recording device 23 of described light source 22 is made as reference origin O is recorded in described position recording device 23.Described light source 22 gives off laser beam, and after being radiated at gap between the movable cylinder 420 of lens barrel 44 and voice coil motor 42, laser beam reflexes to position recording device 23 through the lateral wall of lens barrel 44, and forms a hot spot point O1 on this pen recorder 23.Described position recording device 23 records this hot spot point O1 position, and calculating simultaneously the position that this hot spot point O1 and described light source 22 send light beam is the distance of reference origin O.Be preset with an acceptable preset range in described analytical equipment 30, if between this hot spot point O1 and reference origin O, the distance of relativity shift is in the acceptable preset range, be also inclination angle between lens barrel 44 and voice coil motor 42 in an acceptable preset range time, analytical equipment 30 shows that these camera lens modules 40 to be detected are qualified.Offset distance between this hot spot point O1 and reference origin O is greater than predetermined value, is also inclination angle between lens barrel 44 and voice coil motor 42 when exceeding in the acceptable preset range, and analytical equipment 30 shows that these camera lens modules 40 to be detected are defective.Be understandable that, described error allowed band can arrange according to customer requirement.In present embodiment, described error allowed band is between the 0-0.2 millimeter.
In order more accurately this camera lens module 40 to be measured, the user can carry out multiple spot and detect.Particularly, actuator 14 drives load bearing seat 12, so that the rotation of the optical axis of lens barrel 44 surrounding lens modules 40, described light source 22 constantly gives off laser beam, and described position recording device 23 records the position of each reflected light spot.Described analytical equipment 30 analyze with distance reference initial point O farthest hot spot point position and the relativity shift between reference origin O apart from whether in the error allowed band, if error surpasses the scope that allows, analytical equipment 30 shows that this camera lens module 40 to be detected is defective.Otherwise it is qualified to show.
Those skilled in the art will be appreciated that; above embodiment is only that the present invention is described; and be not to be used as limitation of the invention; as long as within connotation scope of the present invention, the appropriate change that above embodiment is done and change all drop on the scope of protection of present invention within.

Claims (8)

1. camera lens module detecting system, this camera lens module detecting system is for detection of the inclination angle between the movable cylinder of the lens barrel in the camera lens module and voice coil motor, and this camera lens module detecting system comprises:
One light supply apparatus comprises a light source and a position recording device, the corresponding location coordinate on this position recording device of this light source is made as reference origin O and is recorded in this position recording device, this light source is used for giving off laser beam, and after being radiated at gap between the movable cylinder of lens barrel and voice coil motor, this laser beam of sending reflexes to this position recording device through the lateral wall of lens barrel, and form hot spot point O1 on this position recording device, this position recording device records this hot spot point O1 position, calculates simultaneously the distance between this hot spot point O1 and this reference origin O;
One analytical equipment be used for to be analyzed the distance of this hot spot point O1 and this this reference origin O relativity shift whether in the error allowed band.
2. camera lens module detecting system as claimed in claim 1, it is characterized in that: described light supply apparatus comprises that further a bracing or strutting arrangement is used for supporting described light source and position recording device, so that light source be positioned at the camera lens module an end and with the optical axis deviation certain distance of described camera lens module, and make light ray parallel that light source sends in the central shaft of lens barrel.
3. camera lens module detecting system as claimed in claim 1, it is characterized in that: described position recording device is a light sensor.
4. camera lens module detecting system as claimed in claim 1 is characterized in that: described analytical equipment is by a cable and the electric connection of described position recording device.
5. camera lens module detecting system as claimed in claim 1, it is characterized in that: also comprise a bogey, described bogey comprises a load bearing seat, and described load bearing seat offers an accepting groove, this accepting groove for detection of the time accommodate described camera lens module.
6. camera lens module detecting system as claimed in claim 5 is characterized in that: described bogey comprises that further one is used for driving the actuator of this load bearing seat rotation.
7. camera lens module detecting system as claimed in claim 1, it is characterized in that: be preset with a preset range in described analytical equipment, if this hot spot point and light source send the distance of relativity shift between the position of light beam in this preset range, the described camera lens module of described analytical equipment analysis is qualified, otherwise described camera lens module is defective.
8. camera lens module detecting system as claimed in claim 1, it is characterized in that: described light source and position recording device are adjoined setting mutually.
CN200910306235.2A 2009-08-28 2009-08-28 Lens module detection system and detection method thereof Expired - Fee Related CN102004390B (en)

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Application Number Priority Date Filing Date Title
CN200910306235.2A CN102004390B (en) 2009-08-28 2009-08-28 Lens module detection system and detection method thereof

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CN102004390B true CN102004390B (en) 2013-11-06

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Publication number Priority date Publication date Assignee Title
CN106597193B (en) * 2016-11-11 2019-01-04 歌尔股份有限公司 Detection method, detection device and the instrument of camera module
CN207366931U (en) * 2017-09-25 2018-05-15 深圳市大疆如影科技有限公司 Lens detecting device
CN111272394B (en) * 2020-02-25 2022-05-20 Oppo广东移动通信有限公司 Test method and test system

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JPH08233686A (en) * 1995-02-24 1996-09-13 Nikon Corp Eccentricity measuring method and measuring device of aspheric surface
CN2535180Y (en) * 2002-02-07 2003-02-12 武汉楚天激光(集团)股份有限公司 Optical zoom apparatus of coaxial display and location measurement for laser processing
CN2919188Y (en) * 2006-03-27 2007-07-04 西安北方光电有限公司 Laser non-contact online detecting device
CN102145328B (en) * 2011-04-22 2013-05-08 芜湖依维光电科技有限公司 Automatic glue dispensing device for imaging lens

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