TWI409519B - Inclination angle measurement method for lens module - Google Patents

Inclination angle measurement method for lens module Download PDF

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Publication number
TWI409519B
TWI409519B TW97121117A TW97121117A TWI409519B TW I409519 B TWI409519 B TW I409519B TW 97121117 A TW97121117 A TW 97121117A TW 97121117 A TW97121117 A TW 97121117A TW I409519 B TWI409519 B TW I409519B
Authority
TW
Taiwan
Prior art keywords
lens module
laser
lens
mirror
measuring
Prior art date
Application number
TW97121117A
Other languages
Chinese (zh)
Other versions
TW200951526A (en
Inventor
Han Bang Chen
Original Assignee
Hon Hai Prec Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hon Hai Prec Ind Co Ltd filed Critical Hon Hai Prec Ind Co Ltd
Priority to TW97121117A priority Critical patent/TWI409519B/en
Publication of TW200951526A publication Critical patent/TW200951526A/en
Application granted granted Critical
Publication of TWI409519B publication Critical patent/TWI409519B/en

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Abstract

The invention relates to an inclination angle measurement method for a lens module. The method includes following steps: providing a measuring device; providing a standard device, the standard device includes a cylinder having a reflective surface that can reflect laser; aligning the measuring device to the reflective surface and launching a beam of laser to the reflective surface, and adjusting the relative position between the standard device and the measuring device until the reflection angle of the laser is equal to zero degree; fixing the lens module to the standard device and placing the reflective surface on a pre-assembly plane of an image sensor; supplying a reflector and putting the reflector to an end face far away from the standard device of a lens barrel; launching the laser to the reflector and measuring the reflection angle of the laser; computing an inclination angle between the lens module and the pre-assembly plane of the image sensor. The method can measure the inclination angle between the lens module and the pre-assembly plane of the image sensor by geometric method.

Description

Measuring method of tilt angle of lens module

The invention relates to a method for measuring the tilt angle of a lens module.

Since the first day of the digital camera, the digital camera has been popular because of its direct digitization. The digital camera is used to directly convert the optical signal into a digital signal and store it digitally through an image sensor. (See "Digital Camera ABC" China Electro-education Education, 2002, 12. 80-82)

However, during the manufacture and maintenance of the camera module, it is susceptible to the manufacturing and assembly errors of the components, resulting in an phenomenon that the optical axes of the image sensor and the lens module are not perpendicular. This situation may result in uneven illumination of the incident light received by the image sensor, resulting in out of focus of the imaging module imaging corner, so that the image will be uneven. Therefore, it is necessary to measure the tilt angle of the lens module relative to the image sensor in order to feedback the manufacturing parameters of the camera module.

However, when measuring the tilt angle of the lens module relative to the image sensor, the lens module and the image sensor in the camera module are usually assembled, and a standard pattern image is taken. The image is analyzed to obtain the tilt angle of the lens module relative to the image sensor. The measurement method is complicated and the measurement period is long.

In view of this, it is necessary to provide a tilt angle measurement method for a lens module that is simple in measuring means.

A method for measuring the tilt angle of a lens module. The lens module to be tested Includes a lens mount and a lens barrel. The lens holder has a receiving cavity, and the lens barrel is received in the receiving cavity. The method comprises the steps of: providing a measuring device capable of calculating a reflection angle of a reflected laser by emitting a laser and receiving a reflected laser; providing a standard fixture comprising a cylinder a side surface of the cylinder is a reflecting surface capable of reflecting a laser; the measuring device is aligned with a reflecting surface of the standard fixture, and a laser is emitted to the reflecting surface to adjust the standard fixture and the measuring device The relative position is until the reflection angle of the laser reflected by the reflective surface is zero degrees; the lens module is fixed on the standard fixture, and the reflective surface is located in a plane of the lens module to be mounted on the image sensor, The plane is attached to the receiving cavity of the lens holder away from one end of the lens barrel; a horizontal mirror is provided and placed in the lens module, the lens barrel is away from the end surface of the standard jig; and the mirror is emitted The laser measures the angle of reflection of the laser after passing through the mirror; and calculates the tilt angle of the lens module relative to the plane of the predetermined image sensor.

Compared with the prior art, the tilt angle measuring method of the lens module provided by the present invention can pass the geometric optical method by providing a standard jig having a reflecting surface and a mirror placed on one end surface of the lens barrel. The tilt angle of the lens module relative to the plane of the image sensor to be mounted is measured. The measuring method is simple and the measuring cycle is short.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 , the tilt of the lens module provided by the embodiment of the present invention. The angular measurement method mainly applies the optical reflection principle, and the inclination angle between the two planes is obtained by separately measuring the reflection angles of the laser passing through two planes. It can be understood that if the reflection angle of one of the planes is zero degrees and the reflection angle of the other plane is θ, the inclination angle of the two planes is also θ.

Referring to FIG. 2, FIG. 3 and FIG. 4, the lens module to be tested 10 includes a lens holder 11 and a lens barrel 12. The lens holder 11 has a receiving cavity 111, and the lens barrel 12 is received in the receiving cavity. 111. The tilt angle measurement method of the lens module includes the following steps: Step S202, providing a measuring device 20 capable of calculating a reflection angle of the reflected laser by emitting a laser and receiving the reflected laser.

In step S204, a standard jig 30 is provided. The standard jig 30 includes a cylinder 31 and a carrying platform 32. One end surface of the cylindrical body 31 is a reflecting surface 311, and the carrying platform 32 extends from one end of the cylindrical body 31 away from the reflecting surface 311. The reflecting surface 311 is capable of reflecting a laser. The reflecting surface 311 can be a mirror-finished plane. It is also possible to fix a mirror at one end of the cylinder 31, and the reflecting surface 311 of the standard jig 30 is the mirror surface of the mirror.

In step S206, the measuring device 20 is aligned with the reflecting surface 311 of the standard jig 30. A laser is emitted to the reflecting surface 311, and the relative position of the standard jig 30 and the measuring device 20 is adjusted until the reflection angle of the laser reflected by the reflecting surface 311 is zero. It can be understood that if the tilt angle of the lens module 10 is required to be measured in batches, the position of the adjusted measuring device 20 and the standard jig 30 can be fixed, and the reflecting surface 311 can be regarded as a standard surface.

In step S208, the lens module 10 is fixed on the standard fixture 30, and the reflective surface 311 is located in a plane of the lens module 10 on which the image sensor is mounted. The plane is attached to the lens mount 11. The accommodating cavity 111 is away from one end of the lens barrel 12.

In step S210, a horizontal mirror 40 is provided and placed on the end surface of the lens barrel 12 in the lens module 10 away from the end of the standard jig 30.

In step S212, a laser is emitted to the mirror 40 to measure a reflection angle θ of the laser after passing through the mirror 40.

In step S214, the tilt angle β of the lens module 10 relative to the plane of the predetermined image sensor is calculated. In the present embodiment, the reflection angle θ is equal to the inclination angle β.

In the tilt angle measurement method of the lens module, the step S204 may be before the step S202.

Compared with the prior art, the tilt angle measuring method of the lens module provided by the present invention can pass the geometric optical method by providing a standard jig having a reflecting surface and a mirror placed on one end surface of the lens barrel. The tilt angle of the lens module relative to the plane of the image sensor to be mounted is measured. The measuring method is simple and the measuring cycle is short.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

Lens module ‧‧10

Lens mount ‧‧11

Housing cavity ‧‧11

Mirror ‧‧12

Measuring device ‧‧20

Standard fixture ‧ ‧ 30

Cylinder ‧‧31

Reflective surface ‧‧‧311

Carrying platform ‧‧32

Mirror ‧ ‧ 40

FIG. 1 is a schematic diagram of a method for measuring a tilt angle of a lens module according to an embodiment of the present invention.

2 is a schematic structural view of a tilt angle measurement method of a lens module according to an embodiment of the present invention when measuring a tilt angle of a standard fixture.

FIG. 3 is a schematic structural view of a method for measuring a tilt angle of a lens module according to an embodiment of the present invention when measuring a tilt angle of a lens barrel.

4 is a flow chart of a method for measuring a tilt angle of a lens module according to an embodiment of the present invention.

Claims (4)

  1. A method for measuring a tilt angle of a lens module, the lens module to be tested includes a lens holder and a lens barrel, the lens holder has a receiving cavity, and the lens barrel is received in the receiving cavity, and the improvement is that The method comprises the steps of: providing a measuring device capable of calculating a reflection angle of a reflected laser by emitting a laser and receiving a reflected laser; providing a standard fixture comprising a cylinder a side surface of the cylinder is a reflecting surface capable of reflecting a laser; the measuring device is aligned with a reflecting surface of the standard fixture, and a laser is emitted to the reflecting surface to adjust the standard fixture and the measuring device The relative position is until the reflection angle of the laser reflected by the reflective surface is zero degrees; the lens module is fixed on the standard fixture, and the reflective surface is located in a plane of the lens module to be mounted on the image sensor, The plane is attached to the receiving cavity of the lens holder away from one end of the lens barrel; a horizontal mirror is provided and placed in the lens module, the lens barrel is away from the end surface of the standard jig; Laser emission is measured after the reflection angle of the laser by the mirror; calculated and predetermined tilt angle lens module relative the plane of the image sensor is mounted.
  2. The method for measuring a tilt angle of a lens module according to claim 1, wherein the reflective surface is a mirror-finished plane.
  3. The method for measuring a tilt angle of a lens module according to claim 1, wherein the standard fixture has a mirror fixed at one end thereof, and the standard treatment The reflecting surface of the mirror is the mirror surface of the mirror.
  4. The tilting angle measuring method of the lens module according to the first aspect of the invention, wherein the standard jig further comprises a carrying platform extending from the one end of the cylinder away from the reflecting surface.
TW97121117A 2008-06-06 2008-06-06 Inclination angle measurement method for lens module TWI409519B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW97121117A TWI409519B (en) 2008-06-06 2008-06-06 Inclination angle measurement method for lens module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW97121117A TWI409519B (en) 2008-06-06 2008-06-06 Inclination angle measurement method for lens module

Publications (2)

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TW200951526A TW200951526A (en) 2009-12-16
TWI409519B true TWI409519B (en) 2013-09-21

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103309066B (en) * 2013-06-17 2015-12-23 深圳市华星光电技术有限公司 The method of measuring the inclination angle of the signal line means and
CN106643571B (en) * 2016-12-30 2019-08-20 杭州罗松贸易有限公司 A kind of angle calibration system device and calibration method based on isoperibol
CN107702695A (en) * 2017-09-26 2018-02-16 歌尔股份有限公司 Camera module group lens and the method for testing of imaging sensor relative position

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5392112A (en) * 1992-03-11 1995-02-21 Nikon Corporation Inclination angle metering apparatus
US20030164880A1 (en) * 2000-04-25 2003-09-04 Rainer Mockler Digital camera or digital video camera and method for acquiring images
TW200535484A (en) * 2004-04-30 2005-11-01 Axon Technologies Corp Optical lens, design method of optical lens, and lens system
CN1823523A (en) * 2003-07-15 2006-08-23 卡西欧计算机株式会社 Projector apparatus, inclination angle obtaining method, and projection image correction method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5392112A (en) * 1992-03-11 1995-02-21 Nikon Corporation Inclination angle metering apparatus
US20030164880A1 (en) * 2000-04-25 2003-09-04 Rainer Mockler Digital camera or digital video camera and method for acquiring images
CN1823523A (en) * 2003-07-15 2006-08-23 卡西欧计算机株式会社 Projector apparatus, inclination angle obtaining method, and projection image correction method
TW200535484A (en) * 2004-04-30 2005-11-01 Axon Technologies Corp Optical lens, design method of optical lens, and lens system

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