CN100405036C - Optical assembly testing and adjusting method - Google Patents
Optical assembly testing and adjusting method Download PDFInfo
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- CN100405036C CN100405036C CNB2005100650871A CN200510065087A CN100405036C CN 100405036 C CN100405036 C CN 100405036C CN B2005100650871 A CNB2005100650871 A CN B2005100650871A CN 200510065087 A CN200510065087 A CN 200510065087A CN 100405036 C CN100405036 C CN 100405036C
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Abstract
The present invention relates to an optical assembly testing and adjusting method. The present invention has the procedures: a. a central point position of the optical sensor and a central point position of the lens are detected; b. the optical sensor is in contraposition with the central point position of the lens, and the lens mount is fixed on the second circuit board; c. the optical assembly is positioned on a movable platform of a testing device; d. the movable platform is moved, and the optical assembly is in contraposition with a central point position of a testing pattern of the testing device; f. image test and analysis are carried out; g. a focusing tool of the testing device is held and is arranged on the lens in the lens mount and adjusts the focal length range of the lens according to image test result; h. the focal length of the lens is fixed to complete the test and the adjustment of the optical assembly. The present invention can improve the test accuracy of the optical assembly and image quality, can avoid the problem that test erroneous judgment is generated by the vibration of the optical assembly in movement, and can improve the efficiency of the test and the adjustment of the optical assembly.
Description
Technical field
The present invention refers to a kind of test and method of adjustment of optical module especially about a kind of test and method of adjustment.
Background technology
The principle of image capture unit is to utilize irradiate light on the object of desiring pick-up image, reflecting the back in light is received by the optical module in the image capture unit, and optical signalling is converted to simulating signal, the last digital signals format that can show, edit, store and export that is converted to again is to show by display device or the printing equipment printing.
Fig. 1 is the optical assembly structure exploded view of image capture unit.Optical module 1 consists predominantly of first circuit board 10, optical sensor 11, lens mount 12, lens 13 and second circuit board 14, and wherein the end face of first circuit board 10 is laid with various electronic component 101.Optical sensor 11 is charge coupled device (CCD), complementary metal oxide semiconductor transducer (CMOS sencor) or other photo-sensitive cells etc.The side of optical sensor 11 is provided with a plurality of contact terminals 111, but contact terminal 111 electrical ties are in the hole 102 of first circuit board 10.Lens mount 12 is by rectangular frame 121 and is constituted from framework 121 upwardly extending cylindrical shape ring stands 122 that this ring stand 122 can be arranged at its inside for lens 13.Framework 121 is formed with a space bar 123 with the place of being separated by of ring stand 122, is provided with a through hole 124 in the center of space bar 123.Be provided with an accommodation chamber 125 in framework 121 inside, this accommodation chamber 125 can hold receives electronic component 101 and the optical sensor 11 that is arranged on the first circuit board 10, and the floorage of framework 121 equates substantially with the area of first circuit board 10.Framework 121 is extended with a plurality of angles 126 in addition, second circuit board 14 then is provided with the pilot hole 141 of a plurality of correspondences, after the angle 126 of framework 121 is fixedly arranged on the pilot hole 141 of second circuit board 14, the lens mount 12 and the combination of lens 13 are fixed on the second circuit board 14, to form optical module 1.
Because optical module 1 is the important key of decision pick-up image quality in the image capture unit, therefore all can carry out multinomial test and adjustment for optical module 1, for example electric test, modulation transfer functions (ModulationTransfer Function, MTF) test and focal length adjustment, image quality test etc. are to guarantee the image quality of optical module 1.Fig. 2 is modulation transfer functions (ModulationTransfer Function, MTF) method flow diagram of test and focal length adjustment that carries out optical module in a conventional manner.As shown in Figure 2, as the modulation transfer functions that carry out optical module 1 (Modulation Transfer Function, when MTF) test was adjusted with focal length, the optical module 1 after at first will assembling was positioned in modulation transfer functions (MTF) testing tool, as step S11.Then, optical module 1 is moved to a test pattern (Test chart) below, as step S12.Then, with the image of optical module 1 acquisition test pattern, and carry out the MTF analysis of optical module 1.Afterwards, whether the image quality of judging optical module 1 according to data that obtain and chart is normal, as step S14.As the image quality of judging optical module 1 then according to step S15, disassembles optical module, adjusts focal length or replaces optical element when undesired, repeats previous test then.As the image quality of judging optical module 1 is normal, and then continue follow-up test and adjustment program are as step S16.
Yet, because optical sensor 11 now is to be arranged on the first circuit board 10 with surface mounting technology (SMT), therefore the central point of optical sensor 11 can make its central point with lens 13 produce because of the part profile relation of surface mounting technology and lens mount 12 to be offset or can't contraposition, and influences the accurate testing degree and the image quality of optical module 1.Moreover optical module 1 is with the pilot hole on the second circuit board 14 141 angle 126 location with lens mount 12, so the lens 13 on optical sensor 11 and the lens mount 12, and also on business poor easily factor influences the quality of accurate testing degree and image capture.In addition, when moving optical assembly 1 is tested, can tremble to this optical module 1 when mobile, influence product quality and produce the test erroneous judgement.Moreover traditional test mode and equipment can't directly be adjusted the focal range of camera lens 13 according to test result, cause test and the inconvenience of adjusting.
In view of the disappearance of above-mentioned known techniques, how to test efficiently and the adjustment optical module, and also can avoid other external factors to cause test to be judged by accident, be the problem of present relevant solution that the practitioner presses in fact.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of test and method of adjustment of optical module, can print and the part profile relation of lens mount produces the tolerance factor because of surface mounting technology because of the central point of optical sensor so as to improving existing method of testing, and influence the accurate testing degree and the image quality of optical module.
Another object of the present invention is to provide a kind of method of testing of optical module, so as to solving in the prior art when moving optical assembly is tested, can tremble to this optical module when mobile, and produce the problem of test erroneous judgement.
For reaching above-mentioned purpose, a kind of test and method of adjustment of optical module are provided according to an aspect of the present invention, wherein this optical module has a lens mount, lens, an optical sensor, a first circuit board and a second circuit board, this optical sensor is arranged on the first circuit board, this first circuit board is arranged on the second circuit board, and these lens are arranged in the lens mount.Method of the present invention comprises step: (a) detect the center position of optical sensor and the center position of lens; (b) make the center position contraposition of optical sensor and lens, and the fixed mirror headstock is on second circuit board; (c) optical module is placed the mobile platform of a proving installation; (d) move this mobile platform, make the center position contraposition of a test pattern of optical module and proving installation; (f) carry out image test and analysis; (g) be arranged at lens in the lens mount with a focusing apparatus clamping of proving installation, and adjust the focal range of lens according to the image test result; And (h) focal length of fixed lens, with test and the adjustment of finishing optical module.
According to conception of the present invention, wherein optical sensor is charge coupled device or complementary metal oxide semiconductor transducer.
According to conception of the present invention, wherein step (b) is in second circuit board by viscose fixed mirror headstock.
According to conception of the present invention, wherein step (c) comprises that also step (c1) utilizes anchor clamps of proving installation, and a side of optical module and mobile platform is close to.
According to conception of the present invention, wherein proving installation is the modulation transfer functions proving installation.
According to conception of the present invention, wherein step (f) is for carrying out the modulation transfer functions test.
According to conception of the present invention, wherein step (h) is in lens mount by the viscose fixed lens.
For reaching above-mentioned purpose, provide a kind of optical module to adjust the method for testing of focal length according to a further aspect of the invention, wherein this optical module has a lens mount, lens, an optical sensor, a first circuit board and a second circuit board, this optical sensor is arranged on the first circuit board, this first circuit board is arranged on the second circuit board, these lens are arranged in the lens mount, and this lens mount is arranged on the second circuit board.Method of the present invention comprises step: the mobile platform that (a) optical module is placed a proving installation; (b) move this mobile platform, make the center position contraposition of a test pattern of optical module and proving installation; (c) carry out image test and analysis; (d) be arranged at lens in the lens mount with a focusing apparatus clamping of proving installation, and adjust the focal range of lens according to the image test result; And (e) focal length of fixed lens, with test and the adjustment of finishing optical module.
Description of drawings
Fig. 1 is the optical assembly structure exploded view of image capture unit.
Fig. 2 is the method flow diagram that carries out modulation transfer functions test with the focal length adjustment of optical module in a conventional manner.
Fig. 3 is an exemplary optics modular construction exploded view of implementing optical module test of the present invention and method of adjustment.
Fig. 4 is the method flow diagram that carries out modulation transfer functions test with the focal length adjustment of optical module in mode of the present invention.
Fig. 5 (a) ~ (c) is the structural representation of process step shown in Figure 4.
Embodiment
Some exemplary embodiments that embody feature of the present invention and advantage will be described in detail in the explanation of back segment.Be understood that the present invention can have various variations on different aspects, its neither departing from the scope of the present invention, and explanation wherein and to be shown in be when the usefulness that explain in essence, but not in order to restriction the present invention.
See also Fig. 3, it is an exemplary optics modular construction exploded view of implementing optical module test of the present invention and method of adjustment.This exemplary optical module 2 consists predominantly of first circuit board 20, optical sensor 21, lens mount 22, lens 23 and second circuit board 24, and wherein the end face of first circuit board 20 is laid with various electronic component 201.Optical sensor 21 is charge coupled device (CCD), complementary metal oxide semiconductor transducer (CMOS sencor) or other photo-sensitive cells etc.The side of optical sensor 21 is provided with a plurality of contact terminals 211, but contact terminal 211 electrical ties are in the hole 202 of first circuit board 20.Lens mount 22 is by rectangular frame 221 and is constituted from framework 221 upwardly extending cylindrical shape ring stands 222 that this ring stand 222 can be arranged at its inside for lens 23.Framework 221 is formed with a space bar 223 with the place of being separated by of ring stand 222, is provided with a through hole 224 in the center of space bar 223.Be provided with an accommodation chamber 225 in framework 221 inside, this accommodation chamber 225 can hold receives electronic component 201 and the optical sensor 21 that is arranged on the first circuit board 20, and the floorage of framework 221 equates substantially with the area of first circuit board 20.After (not shown) is fixedly arranged on second circuit board 24 in framework 221 by viscose, the lens mount 22 and the combination of lens 23 are fixed on the second circuit board 24, to form optical module 2.
Similarly, because optical module 2 is the important key of decision pick-up image quality in the image capture unit, therefore all must carry out multinomial test and adjustment for optical module 2, for example electric test, modulation transfer functions (Modulation Transfer Function, MTF) test and focal length adjustment, image quality test etc. are to guarantee the image quality of optical module 2.Fig. 4 is modulation transfer functions (Modulation Transfer Function, MTF) method flow diagram of test and focal length adjustment that carries out optical module in mode of the present invention.As shown in Figure 4, as the modulation transfer functions that carry out optical module (Modulation TransferFunction, when MTF) test is adjusted with focal length, at first carry out step S21, detect the center position of optical sensor 21 and the center position that detection is fixedly arranged on the lens 23 in the lens mount 22.Then, shown in Fig. 5 (a), with optical sensor 21 and the center position contraposition that is fixedly arranged on the lens 23 in the lens mount 22, and lens mount 22 is positioned on the second circuit board 24, in order to do making optical sensor 21 and lens 23 accurate contrapositions with viscose 25.This step can avoid surface mounting technology that optical sensor 21 is set and lens mount 22 physical dimension cause tolerances, improves image quality.
Then, carry out step S22, the optical module 2 after the assembling is placed on the mobile platform of MTF proving installation, and, its side toward mobile platform is close to, to increase the stability of follow-up focal length set-up procedure by this optical module 2 of anchor clamps clamping, production line is operated easily, shown in Fig. 5 (b).Afterwards, carry out step S23, the mobile platform 31 of mobile MTF proving installation makes the central point of lens alignment test Figure 32 of optical module, analyzes to carry out MTF, shown in Fig. 5 (c).Then, carry out step S24, be arranged at lens 23 in the lens mount 22 with focusing apparatus 33 clampings, according to the MTF analysis result, rotate or move focusing apparatus 33, lens 23 in the lens mount 22 are moved up or down, to adjust the focal range of lens 23, until the MTF position of the best along the screw thread of both walls by the clamping of focusing apparatus 33.Afterwards, carry out step S25, lens 23 gluings of adjusting the optical module 2 of focal length are positioned lens mount 22, with test and the adjustment of finishing optical module 2.
In sum, optical module test of the present invention and method of adjustment, can improve existing method of testing and can print and the part profile relation of lens mount produces the tolerance factor because of surface mounting technology, and influence the accurate testing degree and the image quality of optical module because of the central point of optical sensor.In addition, can also solve and have now when moving optical assembly is tested, can tremble to this optical module when mobile, and produce the problem of test erroneous judgement.In addition, method of the present invention can increase the test and adjustment efficient of optical module, and can promote production capacity effectively.
Claims (7)
1. the test of an optical module and method of adjustment, wherein this optical module has a lens mount, lens, an optical sensor, a first circuit board and a second circuit board, this optical sensor is arranged on this first circuit board, this first circuit board is arranged on this second circuit board, these lens are arranged in this lens mount, and this method comprises:
Step a detects the center position of this optical sensor and the center position of these lens;
Step b makes the center position contraposition of this optical sensor and these lens, and fixes this lens mount on this second circuit board;
Step c places this optical module on the mobile platform of one proving installation;
Steps d moves this mobile platform, makes the center position contraposition of a test pattern of this optical module and this proving installation;
Step f carries out image test and analysis;
Step g is arranged at these lens in this lens mount with a focusing apparatus clamping of this proving installation, and adjusts the focal range of these lens according to the image test result; And
Step h fixes the focal length of these lens, with test and the adjustment of finishing this optical module.
2. the test of optical module as claimed in claim 1 and method of adjustment is characterized in that this optical sensor is charge coupled device or complementary metal oxide semiconductor transducer.
3. the test of optical module as claimed in claim 1 and method of adjustment is characterized in that this step b fixes this lens mount on this second circuit board by viscose.
4. the test of optical module as claimed in claim 1 and method of adjustment is characterized in that this step c also comprises step c1, utilize anchor clamps of this proving installation in this step c1, and a side of this optical module and this mobile platform is close to.
5. the test of optical module as claimed in claim 1 and method of adjustment is characterized in that this proving installation is the modulation transfer functions proving installation.
6. the test of optical module as claimed in claim 5 and method of adjustment is characterized in that this step f is for carrying out the modulation transfer functions test.
7. the test of optical module as claimed in claim 1 and method of adjustment is characterized in that this step h fixes these lens in this lens mount by viscose, thereby fix the focal length of these lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100650871A CN100405036C (en) | 2005-04-08 | 2005-04-08 | Optical assembly testing and adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100650871A CN100405036C (en) | 2005-04-08 | 2005-04-08 | Optical assembly testing and adjusting method |
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| Publication Number | Publication Date |
|---|---|
| CN1844874A CN1844874A (en) | 2006-10-11 |
| CN100405036C true CN100405036C (en) | 2008-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100650871A Expired - Fee Related CN100405036C (en) | 2005-04-08 | 2005-04-08 | Optical assembly testing and adjusting method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789111A (en) * | 2011-05-19 | 2012-11-21 | 华晶科技股份有限公司 | Lens calibration system and method thereof |
| CN102865998A (en) * | 2011-07-04 | 2013-01-09 | 奇景光电股份有限公司 | Lens quality detection method |
| CN102662293B (en) * | 2012-05-21 | 2015-06-24 | 信利光电股份有限公司 | Close-range focusing device and method |
| CN102902077B (en) * | 2012-10-12 | 2014-11-05 | 宁波舜宇光电信息有限公司 | Method for automatically adjusting back focal length (BFL) of unthreaded lens based on inverse projection mode |
| CN104977152B (en) * | 2014-04-11 | 2017-06-30 | 财团法人工业技术研究院 | Detection device |
| CN109597178B (en) * | 2017-09-30 | 2021-08-10 | 财团法人金属工业研究发展中心 | Optical alignment equipment and optical alignment method |
| CN111141494B (en) * | 2019-12-30 | 2022-03-22 | Oppo广东移动通信有限公司 | Test method and test system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961683A (en) * | 1995-08-24 | 1997-03-07 | Fuji Elelctrochem Co Ltd | Optical device assembling method and its device |
| CN1227347A (en) * | 1998-02-24 | 1999-09-01 | 明碁电脑股份有限公司 | Reflective detector for optical lens combination |
| CN1384345A (en) * | 2001-04-28 | 2002-12-11 | 慧生科技股份有限公司 | Automatic measurement system and method for optical characteristics of optical unit |
| CN1525201A (en) * | 2003-02-26 | 2004-09-01 | 矽峰光电科技股份有限公司 | Lens adjusting method and mechanism thereof |
| CN1534322A (en) * | 2003-03-28 | 2004-10-06 | ������������ʽ���� | Module for optical apparatus and its mfg. method |
| CN2687718Y (en) * | 2004-04-02 | 2005-03-23 | 东友科技股份有限公司 | Optical assembly |
-
2005
- 2005-04-08 CN CNB2005100650871A patent/CN100405036C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961683A (en) * | 1995-08-24 | 1997-03-07 | Fuji Elelctrochem Co Ltd | Optical device assembling method and its device |
| CN1227347A (en) * | 1998-02-24 | 1999-09-01 | 明碁电脑股份有限公司 | Reflective detector for optical lens combination |
| CN1384345A (en) * | 2001-04-28 | 2002-12-11 | 慧生科技股份有限公司 | Automatic measurement system and method for optical characteristics of optical unit |
| CN1525201A (en) * | 2003-02-26 | 2004-09-01 | 矽峰光电科技股份有限公司 | Lens adjusting method and mechanism thereof |
| CN1534322A (en) * | 2003-03-28 | 2004-10-06 | ������������ʽ���� | Module for optical apparatus and its mfg. method |
| CN2687718Y (en) * | 2004-04-02 | 2005-03-23 | 东友科技股份有限公司 | Optical assembly |
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| Publication number | Publication date |
|---|---|
| CN1844874A (en) | 2006-10-11 |
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Granted publication date: 20080723 Termination date: 20100408 |