CN101354306A - Device and method for measuring glasses lens eccentricity - Google Patents

Device and method for measuring glasses lens eccentricity Download PDF

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Publication number
CN101354306A
CN101354306A CNA2007102011829A CN200710201182A CN101354306A CN 101354306 A CN101354306 A CN 101354306A CN A2007102011829 A CNA2007102011829 A CN A2007102011829A CN 200710201182 A CN200710201182 A CN 200710201182A CN 101354306 A CN101354306 A CN 101354306A
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China
Prior art keywords
lens
measured
eccentricity
eyeglass
image
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CNA2007102011829A
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CN101354306B (en
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张仁淙
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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 CN2007102011829A priority Critical patent/CN101354306B/en
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Publication of CN101354306B publication Critical patent/CN101354306B/en
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Abstract

The invention relates to a lens eccentricity measurement device which comprises a base station, a fixture, a probe, an optical imaging module group, an image signal processor and a calculating device. The base station is provided with an accommodating space, the fixture clamps a lens to be measured to the opening of the receiving space of the base station and the probe is positioned at the opening of the receiving space of the base station and used for probing the center of the lens to be measured; the optical imaging module group is arranged in the receiving space of the base station and used for shooting digital image signals formed by the lens to be measured on an image sensor; the image signal processor is used for processing the digital image signals of the image sensor to obtain image information data; the calculating device is used for data processing according to the image information data in the image signal processor to obtain the eccentric magnitude of the lens to be measured. In addition, the invention also provides a method applying the lens eccentricity measurement device to measuring lens eccentricity.

Description

Eccentricity of glasses lens measures device and method for measurement thereof
Technical field
The present invention relates to a kind of eccentricity of glasses lens and measure device and method for measurement thereof.
Background technology
Along with development of multimedia technology, digital camera (sees also Capturing images with digitalstill cameras, Micro, IEEE Volume:18, issue:6, Nov.-Dec.1998 Page (s): 14-19), video camera and the mobile phone that has a camera favor by consumers in general more and more, when the quality of image of people's logarithmic code camera, video camera and mobile phone cam shot object proposed requirements at the higher level, logarithmic code camera, video camera and the product consumptions such as mobile phone that have a camera were also increasing.In the first-class camera of digital camera, video camera and cell-phone camera, camera lens is indispensable parts.
Eyeglass is as the vitals in the camera lens, and the image quality of whole camera lens is played critical effect.Eyeglass is after moulding, grinding and polishing, and its optical axis tends to depart from its geometrical central axis, and this phenomenon is called off-centre.The off-centre of eyeglass can be divided into two kinds in theory, and a kind of is the parallel translation with geometric center of optical axis, and another kind is that optical axis intersects with the eyeglass geometric center, and the in fact normally combination of these two kinds of off-centre of the off-centre of eyeglass.
Traditional eccentricity of glasses lens measurement method has multiple, wherein a kind of eccentricity of glasses lens measurement method is to use collimator and rotation platform to finish eccentric the measurement, eyeglass is fixed on the rotation platform, a collimator is set above described rotation platform, rotate rotation platform during measurement, utilize collimator to carry out off-centre then and measure.But rotation platform can produce the phenomenon depart from rotation center in rotary course, and the central shaft of rotation platform and eyeglass is often because of changing appears in rotation, thereby causes measurement result more inaccurate.
Summary of the invention
In view of this, be necessary to provide a kind of and can improve eccentricity of glasses lens measurement device and the method for measurement thereof that eccentricity of glasses lens measures accuracy.
A kind of eccentricity of glasses lens measures device, and this eccentricity of glasses lens measures device and comprises: base station, and this base station offers receiving space; Anchor clamps, these anchor clamps are retained on the base station surface of described receiving space opening part, are used for eyeglass to be measured is held on the opening part of described base station receiving space; Probe, this probe is arranged on the opening part of described base station receiving space, is used to survey the center of eyeglass to be measured; The optical imagery module, this optical imagery module comprises lens combination and image sensor, this optical imagery module is arranged in the receiving space of base station, and this lens combination is near the opening of this receiving space, and this optical imagery module is used for taking eyeglass to be measured and forms data image signal in this image sensor; Image-signal processor is used to handle the data image signal of image sensor, obtains image information data; Calculation element is used for carrying out data processing according to the image information data in the image-signal processor, obtains the offset of eyeglass to be measured.
A kind of eccentricity of glasses lens measurement method, it may further comprise the steps:
(1) provides as mentioned above an eccentricity of glasses lens to measure device, eyeglass to be measured is fixed on the opening part that this eccentricity of glasses lens measures the base station receiving space of device;
(2) probe that uses this eccentricity of glasses lens to measure device is surveyed this lens surface to be measured center, and makes this probe rest on this center;
(3) the optical imagery module that utilizes eccentricity of glasses lens to measure device is taken the image of the center of lens to be measured that comprises this probe, handles the data image signal of this center of lens with image-signal processor, obtains the image information data of this center of lens;
(4) adjust the focal length of optical imagery module, take the image that comprises lens edge to be measured, handle the data image signal of this lens edge, obtain the image information data of this lens edge with image-signal processor;
(5) two images in superimposed center of lens to be measured and edge utilize calculation element to calculate the departure at lens surface to be measured center and eyeglass external diameter to be measured center;
(6) with eyeglass upset to be measured, repeat above-mentioned steps (2), try to achieve the departure at another centre of surface of eyeglass to be measured and eyeglass external diameter to be measured center to (5);
(7) utilize calculation element to calculate the offset on two surfaces of eyeglass to be measured according to above-mentioned two departures.
With respect to prior art, use described eccentricity of glasses lens to measure device and eyeglass is carried out off-centre measure, because the accuracy limitations of platform without spin, so can improve the accuracy of eccentricity of glasses lens measurement.
In addition, utilize said method that eyeglass is carried out off-centre and measure, can improve the accuracy that eccentricity of glasses lens measures, and the offset of eyeglass two non-spherical surfaces that record with this method is a benchmark with the eyeglass external diameter.
Description of drawings
Fig. 1 is the part decomposing schematic representation that embodiment of the invention eccentricity of glasses lens measures device.
Fig. 2 is the perspective view that embodiment of the invention eccentricity of glasses lens measures device.
Fig. 3 is that embodiment of the invention eccentricity of glasses lens measures the cross-sectional view of device along III-III line among Fig. 2.
Fig. 4 is the one-piece construction synoptic diagram that embodiment of the invention eccentricity of glasses lens measures device.
Fig. 5 is the process flow diagram of embodiment of the invention eccentricity of glasses lens measurement method.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See also Fig. 1 to Fig. 3, eccentricity of glasses lens measures device 10 and comprises base station 11, anchor clamps 12, probe 13, optical imagery module 14, image-signal processor 15 and calculation element 16.
Base station 11 offers receiving space 110, and this receiving space 110 has first receiving space 111, second receiving space 112 and the 3rd receiving space 114 that is interconnected.This first receiving space 111 is the right cylinder of hollow, and upper opening is bigger, and bottom opening is slightly little, forms a circular platform 1110 in its bottom.Described second receiving space 112 is that upper opening is bigger, bottom opening is less than the bucket shape structure of upper opening, the compartment of terrain offers four grooves 115 on the inwall 116 of its inclination, the internal face of this groove 115 is coated with reflectance coating (figure does not show), be provided with light emitting diode 116 in this groove 115, the light beam that this light emitting diode 116 sends illuminates this receiving space 110 through the reflectance coating reflection of groove 115 internal faces.The 3rd receiving space 114 is a hollow cylindrical structures, is formed with internal thread on the inwall of the 3rd receiving space 114.
Anchor clamps 12 comprise support component that is positioned at first receiving space, 111 opening parts and the flexure strip that matches with this support component.In the present embodiment, this support component for the be complementary transparent support ring 120 of shape of receiving space opening shape, this transparent support ring 120 sticks on the inwall of first receiving space 111, and the bottom circular platform 1110 by this first receiving space 111 supports, in order to eyeglass to be measured is supported on the top of described base station 11 first receiving spaces 111.Three flexure strips 113 are fastened on by screw 123 on the upper surface 118 of described base station 11, are used for eyeglass to be measured is fixed on transparent support ring 120.
Probe 13 is arranged on the opening part of described base station 11 first receiving spaces 111, is used to survey the center of eyeglass to be measured.
Optical imagery module 14 comprises lens combination 141 and image sensor 142, this lens combination 141 is arranged in the lens barrel 140, has external thread on the outer wall of this lens barrel 140, match with the internal thread of base station 10 the 3rd receiving space 114 inwalls, lens barrel 140 is retained in the 3rd receiving space 114 of base station 10.This image sensor 142 is arranged on the circuit board 143, is oppositely arranged with lens combination 141, is housed in the 3rd receiving space 114 of base station 10.This optical imagery module 14 is relative with eyeglass to be measured to be disposed, and this optical imagery module 14 is used for taking eyeglass to be measured and forms data image signal in image sensor 142, and this optical imagery module 14 has automatic focusing function.
Image-signal processor 15 is arranged on the circuit board 143, is electrically connected with the image sensor 142 of described optical imagery module 14, and the data image signal of image sensor 142 is handled, and obtains image information data.
Calculation element 16 is by being connected with connector 161 on the circuit board 143, realizes and being electrically connected of described image-signal processor 15, and is used for carrying out data processing according to image-signal processor 15 interior image information datas.
In addition, anchor clamps 12 quantity that this eccentricity of glasses lens measures device 10 are not limited to three, two and all can more than two.First receiving space 111 also can be cube or polyhedral hollow structure, and second receiving space 112 also can be for falling the hollow structure of bucking ladder etc.Support component also can be a plurality of support chip monomers, paste fixing with the inwall of first receiving space 111, perhaps this support component is by pasting or the mode of mechanical connection is arranged on the upper surface 118 of base station 11, and this mechanical connection manner is mode such as screw retention for example.The light source that is arranged in second receiving space 112 is not limited to light emitting diode 116, also can be other light-emitting component, for example cold-cathode fluorescence lamp or Halogen lamp LED etc.
See also Fig. 4, measure the one-piece construction synoptic diagram of device 10 for embodiment of the invention eccentricity of glasses lens.In the present embodiment, probe 13 uses 3 D stereo measuring instrument 20, and for example the probe of UA3P (Ultrahigh Accurate 3-D Profilometer) is not limited thereto, as long as this probe can detect the center of eyeglass to be measured.
See also Fig. 5, be the process flow diagram of eccentricity of glasses lens measurement method.This eccentricity of glasses lens measurement method may further comprise the steps:
(1) provide eccentricity of glasses lens as described in Figure 4 to measure device 10, see also Fig. 3, the eyeglass to be measured 30 that at first with eyeglass two surfaces all is aspheric surface is positioned on the transparent support ring 120 of eccentricity of glasses lens measurement device 10, make the edge of eyeglass 30 to be measured be supported on the opening part of transparent support ring 120, the screw 123 of three flexure strips 121 is fixed in adjustment, make flexure strip 121 clamp the edge of eyeglass 30 to be measured, make eyeglass 30 to be measured relative with optical imagery module 14.
(2) utilize the algorithm of 3 D stereo measuring instrument 20 to obtain the center of eyeglass 30 non-spherical surfaces 31 to be measured, make the probe 13 of this 3 D stereo measuring instrument 20 rest on the center of this eyeglass 30 to be measured.
(3) open the light emitting diode 116 that is arranged in base station 11 second receiving spaces 112, illuminate the receiving space 110 of base station 11, take the image of the eyeglass to be measured 30 that comprises 3 D stereo measuring instrument 20 probes 13 by optical imagery module 14, form the center of lens data image signal in image sensor 142.Handle by 15 pairs of data image signals that are stored in this center of lens of image sensor 142 of image-signal processor again, obtain the image information data of this center of lens.
(4) utilize calculation element 16 to adjust the focal length of optical imagery module 14, make the edge imaging of eyeglass 30 to be measured more clear, at this moment, shooting comprises the image of lens edge to be measured, this lens edge data image signal that is stored in image sensor 142 by 15 pairs of image-signal processors is handled again, obtains the image information data of this lens edge.
(5) superimposed described two images utilize calculation element 16 to calculate the departure at eyeglass to be measured 30 non-spherical surfaces, 31 centers and eyeglass to be measured 30 external diameter centers.
(6) with eyeglass 30 upsets to be measured, repeat above-mentioned steps (2) ~ (5), when taking the image of eyeglass 30 another surperficial center and peripherals, the focal length of the focal length that keep optical imagery module 14 during respectively with the central point of taking 30 1 surfaces of eyeglass as mentioned above and edge equates.Try to achieve the departure at eyeglass to be measured 30 another non-spherical surface 32 centers and eyeglass to be measured 30 external diameter centers.
Utilize calculation element to calculate the offset of 30 two non-spherical surfaces of eyeglass to be measured 31,32 according to above-mentioned two departures.
This eccentricity of glasses lens measures apparatus and method and is not only applicable to the eyeglass that two surfaces all are aspheric surfaces, is applicable to that also the surface is the off-centre measurement of the eyeglass of other shapes.
With respect to prior art, the eccentricity of glasses lens of present embodiment measures 10 pairs of eyeglasses of device 30 to carry out off-centre and measures, because the accuracy limitations of platform without spin, so can improve the accuracy of eccentricity of glasses lens measurement.And the offset of the 30 liang of non-spherical surfaces of eyeglass 31,32 that record with this method is a benchmark with eyeglass 30 external diameters.
In addition, those skilled in the art also can do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.

Claims (8)

1. an eccentricity of glasses lens measures device, and it comprises:
Base station, this base station offers receiving space;
Anchor clamps, these anchor clamps are retained on the base station surface of described receiving space opening part, are used for eyeglass to be measured is held on the opening part of described base station receiving space;
Probe, this probe is arranged on the opening part of described base station receiving space, is used to survey the center of eyeglass to be measured;
The optical imagery module, this optical imagery module comprises lens combination and image sensor, this optical imagery module is arranged in the receiving space of base station, and this lens combination is near the opening of this receiving space, and this optical imagery module is used for taking eyeglass to be measured and forms data image signal in this image sensor;
Image-signal processor is used to handle the data image signal of image sensor, obtains image information data;
Calculation element is used for carrying out data processing according to the image information data in the image-signal processor, obtains the offset of eyeglass to be measured.
2. eccentricity of glasses lens as claimed in claim 1 measures device, it is characterized in that the inwall of this receiving space is provided with light source, the usefulness of throwing light on when being used for the imaging of optical imagery module.
3. eccentricity of glasses lens as claimed in claim 2 measures device, it is characterized in that this light source is line source or pointolite.
4. eccentricity of glasses lens as claimed in claim 1 measures device, it is characterized in that these anchor clamps comprise support component that is positioned at the receiving space opening part and the flexure strip that matches with this support component.
5. eccentricity of glasses lens as claimed in claim 4 measures device, it is characterized in that, this support component be one with the be complementary transparent support ring of shape of receiving space opening shape.
6. eccentricity of glasses lens as claimed in claim 4 measures device, it is characterized in that this support component is a plurality of support chip monomers.
7. eccentricity of glasses lens as claimed in claim 1 measures device, it is characterized in that this optical imagery module is the optical imagery module with automatic focus function.
8. eccentricity of glasses lens measurement method, it may further comprise the steps:
(1) provides just like any described eccentricity of glasses lens measurement device in the claim 1 to 7, eyeglass to be measured is fixed on the opening part that this eccentricity of glasses lens measures the base station receiving space of device;
(2) probe that uses this eccentricity of glasses lens to measure device is surveyed this lens surface to be measured center, and makes this probe rest on this center;
(3) the optical imagery module that utilizes eccentricity of glasses lens to measure device is taken the image of the center of lens to be measured that comprises this probe, handles the data image signal of this center of lens with image-signal processor, obtains the image information data of this center of lens;
(4) adjust the focal length of optical imagery module, take the image that comprises lens edge to be measured, handle the data image signal of this lens edge, obtain the image information data of this lens edge with image-signal processor;
(5) two images in superimposed center of lens to be measured and edge utilize calculation element to calculate the departure at lens surface to be measured center and eyeglass external diameter to be measured center;
(6) with eyeglass upset to be measured, repeat above-mentioned steps (2), try to achieve the departure at another centre of surface of eyeglass to be measured and eyeglass external diameter to be measured center to (5);
(7) utilize calculation element to calculate the offset on two surfaces of eyeglass to be measured according to above-mentioned two departures.
CN2007102011829A 2007-07-26 2007-07-26 Device and method for measuring glasses lens eccentricity Expired - Fee Related CN101354306B (en)

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Application Number Priority Date Filing Date Title
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CN101354306B CN101354306B (en) 2010-11-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103926053A (en) * 2013-01-11 2014-07-16 上海嫦娥光学仪器科技有限公司 Automatic lensmeter
CN104833320A (en) * 2015-05-22 2015-08-12 丹阳丹耀光学有限公司 Reflection-transmission eccentric instrument test platform and reflection-transmission eccentric instrument
CN109186953A (en) * 2018-07-27 2019-01-11 东莞市凯融光学科技有限公司 A kind of measurement method of image-type optical mirror slip mechanical eccentric
CN110095100A (en) * 2018-01-31 2019-08-06 扬明光学股份有限公司 Coordinate measure system and its jig

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5844670A (en) * 1995-07-28 1998-12-01 Ricoh Co., Ltd. Method of and systems for measuring eccentricity of an aspherical lens surface
JP3725817B2 (en) * 2001-11-20 2005-12-14 オリンパス株式会社 Aspheric lens decentration measuring method and decentration measuring apparatus
JP4764040B2 (en) * 2005-03-18 2011-08-31 キヤノン株式会社 A method for measuring the eccentricity of the aspherical axis of a lens
CN1987348B (en) * 2005-12-23 2010-04-14 鸿富锦精密工业（深圳）有限公司 Accentric detector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103926053A (en) * 2013-01-11 2014-07-16 上海嫦娥光学仪器科技有限公司 Automatic lensmeter
CN103926053B (en) * 2013-01-11 2018-08-24 上海嫦娥光学仪器科技有限公司 Automatic lensometer
CN104833320A (en) * 2015-05-22 2015-08-12 丹阳丹耀光学有限公司 Reflection-transmission eccentric instrument test platform and reflection-transmission eccentric instrument
CN104833320B (en) * 2015-05-22 2016-05-25 丹阳丹耀光学有限公司 Anti-transmission Eccentric Instrument test platform and anti-transmission Eccentric Instrument
CN110095100A (en) * 2018-01-31 2019-08-06 扬明光学股份有限公司 Coordinate measure system and its jig
CN109186953A (en) * 2018-07-27 2019-01-11 东莞市凯融光学科技有限公司 A kind of measurement method of image-type optical mirror slip mechanical eccentric

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