CN106052600A - Method for measuring flatness of protective screen of window - Google Patents
Method for measuring flatness of protective screen of window Download PDFInfo
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- CN106052600A CN106052600A CN201610512454.6A CN201610512454A CN106052600A CN 106052600 A CN106052600 A CN 106052600A CN 201610512454 A CN201610512454 A CN 201610512454A CN 106052600 A CN106052600 A CN 106052600A
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- light
- module
- lens
- measuring
- measuring method
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/303—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces using photoelectric detection means
Abstract
The embodiment of the invention provides a method for measuring flatness of a protective screen of a window. The method comprises: S1, a light source emits a measuring beam; S2, a fiber coupler decomposes the measuring beam into a first path of light and a second path of light; S3, the first path of light passes through a first optical path module and then returns; and the second path of light passes through a second optical path module and returns; S4, the first path of light and the second path of light return and pass through the fiber coupler and then a measuring optical signal is outputted; S5, the measuring optical signal enters a photoelectric detection module and a measuring electrical signal is outputted; and S6, the measuring electrical signal passes through a circuit processing module and then enters a computer for calculation and displaying. According to the measuring method, non-contact measurement on a protective screen of a window can be carried out with high precision and high efficiency; and thus a detection requirement of a protective screen of a window in industrial production can be met.
Description
Technical field
The present invention relates to fields of measurement, a kind of measuring method measuring form protective shield surface smoothness.
Background technology
Form protective shield (Cover Lens) is in addition outer in display screen, for the touch module of touch screen, display screen
With the transparent glasses lens that the display screen of non-touch screen is protected.Owing to the touch module of touch screen belongs to precision machined sensitive
Components and parts, outside if exposed easily scratch because of abrasion, sharppointed article and affect its using effect and life-span, the display of non-touch screen
Screen (particularly LCDs) is easily squeezed and causes hot spot, black patch, water ripples etc. to affect it and use, it is therefore desirable to
Increase by one piece of protective shield outside the display screen of mobile phone, panel computer, notebook, flat panel TV etc., be used for protecting touch module and showing
Display screen etc. are from damage.
At present, form protective shield is mainly used in carrying out the flat faced display of the products such as mobile phone, panel computer, MP3/MP4
Decoration and protection, have the function such as surface scratch resistance, ultra-thin shockproof, screen protection, and therefore, form protective shield mainly uses chemistry
Strengthening glass, one piece of good form protective shield has the features such as thin, good transmittance, mechanical strength high, hardness is big.
The course of processing of form protective shield needs through multiple working procedure, it is possible to the deformation of protective shield can be caused, this
A little deformation are often random, uncertain, the most how to improve technique, and the substandard products produced due to deformation go out the most randomly
Existing, irregular form protective shield can affect the use sensation of user, the most visually feels there is the existence of singular point, hands touch-control
Feel unsmooth etc., it is also possible to affecting performance, form protective shield is the outermost layer screen that user contacts, in sense of touch control,
Touch-control order is passed to following tactile layer, if form protective shield out-of-flatness, then the transmission of touch-control order may make mistakes, and leads
Cause touch-control performance the best.
Therefore, in the production of form protective shield, often the form protective shield of batch is carried out roughness measurement, two
In existing factorial praluction, have by using the methods such as ocular estimate, machine vision or contact type measurement to judge that form protects
The flatness of screen, ocular estimate wastes time and energy, and accuracy rate is low, and efficiency is low, and machine vision is to take a picture screen, then utilizes meter
Image is identified and analyzes by calculation machine, and this method is applicable to the measurement to profile, due to the restriction of precision, for surface
Flatness is the most helpless.Touch measurement is means conventional in current batch production, also can compare accurately, but touch
Measurement is the measuring method of a kind of contact, it is easy to form protective shield can be caused secondary damage, therefore be not preferable
Measuring method.
Therefore, urgent wishing to is a kind of contactless, and efficiency is high, precision satisfactory protective shield measuring method
The form protective shield meeting batch production with device produces the needs detected.
Summary of the invention
The embodiment of the present invention proposes a kind of measuring method measuring form protective shield flatness, including:
S1, light source sends measuring beam.
S2, measuring beam is decomposed into first via light and the second road light by fiber coupler.
S3, first via light is by returning after the first light path module；Second road light is returned by the second light path module.
After S4, first via light and the second road light return through fiber coupler, optical signal is measured in output.
S5, measures optical signal and enters photoelectric detection module, and the signal of telecommunication is measured in output.
S6, the measurement signal of telecommunication enters computer after processing of circuit module and is calculated and be shown.
Further, described measuring beam is coherent light, and coherence length is 60nm.
Further, described first light path module include lens a, lens b, loophole, lens c, lens d, reflecting mirror with
And control the mobile module that described reflecting mirror moves, described first via light sequentially pass through lens a, lens b, loophole, lens c,
Return along road through reflection after lens d, reflecting mirror.Described reflecting mirror is fixed on described mobile module, and utilizes described mobile mould
Block carries out at the uniform velocity back and forth movement.
Further, described mobile module is the horizontal reciprocating device that linear electric motors control.
Further, the diameter r≤0.5mm of described loophole 5.
Further, described horizontal reciprocating distance L=5-30cm.
Further, described second light path module includes array of photoswitch collimating module, form protective shield to be measured and demarcation
Plate, described second road light sequentially passes through array of photoswitch collimating module, returns after form protective shield to be measured and scaling board.
Further, described array of photoswitch collimating module has the light output of N*M road, N >=1, M >=1.
Further, array of photoswitch collimating module has N road light and exports the most respectively.
Further, described scaling board reflects the surface smoothness≤1um of described second road light.
The measuring method that the embodiment of the present invention provides, it is possible to achieve in high precision, expeditiously form protective shield is carried out non-
The measurement of contact, can meet the testing requirement to form protective shield in industrialized production.
Accompanying drawing explanation
Fig. 1 shows measurement apparatus system construction drawing；
Fig. 2 shows measuring method flow chart；
Fig. 3 is to measure form protective shield certain point signal results figure；
Fig. 4 is computer matching form protective shield plane graph.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describing, present example is shown in the drawings wholely, although invention will be described in conjunction with the embodiments, it should be appreciated that it is also
These embodiments have to be limited the invention to.On the contrary, this invention is intended to cover and may be included in what claims were limited
Replacement, amendment and equivalents in spirit and scope.It addition, in described below to the embodiment of the present invention, it is proposed that very
Many details are so that the present invention is thoroughly understood.But, it will be appreciated by those of ordinary skill in the art that and do not have these concrete
Details also can implement the present invention.In other example, in order to unnecessarily obscure the aspect of the present invention, do not describe in detail known
Method, process, parts and circuit.
Some parts following detailed description of is according to process, step, logical block, process and to can be at computer storage
Other symbol of the operation of the data bit of upper execution represents to propose.These descriptions and expression are the technology of data processing field
That personnel are used, in order to the essence of its work being conveyed to most effectively the means of other technical staff of this field.Here, mistake
What step that journey, computer perform, logical block, process etc. were usually contemplated as causing the step of expected result or instruction is in harmony sequence certainly
Row.Described step is the step needing the physical manipulation to physical quantity.Generally, although unnecessary, this tittle uses can be at meter
The form of the electrical or magnetic signal storing, transmit, combine, compare or additionally handling in calculation machine system.It has been proved that primarily to
These signals referred to as position, value, element, symbol, character, project, numeral etc. are convenient by the reason of public use sometimes.
But, should keep firmly in mind, all these with similar term should be associated with suitable physical quantity and be only
Be applicable to this tittle facilitates labelling.Unless specifically stated otherwise, the most as described below in apparent to, it should be understood that whole
In the present invention, the term used by discussion, such as " association " or " identification " or " reproduction " or " needs " or " determination " or " repetition " or " hold
OK " or " detection " or " guiding " etc., referring to electronic system or the action of similar electronic computing device and process, electronics is set by it
Being expressed as data manipulation that physics (electronics) measures and be transformed into electronic device memory or post in standby RS
Storage or other such information storage, transmission or display device in other data being similarly represented as physical quantity.
Fig. 1 explanation is according to the measurement system structure schematic diagram of the various exemplary embodiments of the present invention.
Measurement system of the present invention includes computer 15, processing of circuit module 14, photodetector and measurement dress
Putting, described measurement apparatus couples with described photodetector, the measurement light that described measurement apparatus is exported by described photodetector
Signal is converted into the measurement signal of telecommunication, and enters into computer 15 after described processing of circuit module 14 and calculate, and draws survey
Amount result also shows.
Measurement apparatus of the present invention, including light source 1, fiber coupler 2, the first light path module 16 and the second light path mould
Block 17, it is identical that described light source 1 sends frequency, and the light that direction of vibration is identical, i.e. coherent light.
Preferably, the coherent light that light source 1 is sent coherence length within coherence time is comparatively short, and preferred coherence length is
Between 40-80nm, a length of 55-65nm of preferred coherent light, the most relevant square degree is 60nm.
The coherent light that described light source 1 sends, through fiber coupler 2, is divided into two-way light, respectively first via light and second
Lu Guang, after first via light enters into the first light path module 16, and the second road light enters the second light path module 17, again returns to light
Fine bonder 2, and export measurement optical signal.
Described first light path module 16 includes lens a, lens b, loophole 5, lens c, lens d, reflecting mirror 8 and controls
The mobile module 9 that described reflecting mirror 8 moves.
Described first via light sequentially passes through after lens a, lens b, loophole 5, lens c, lens d, reflecting mirror 8 through reflection edge
Road returns.Described reflecting mirror 8 is fixed on described mobile module 9, and utilizes described mobile module 9 to carry out at the uniform velocity back and forth movement.
Preferably, described mobile module 9 is the horizontal reciprocating device that linear electric motors control.
Preferably, described horizontal reciprocating distance L=5-30cm.
Preferably, described is at the uniform velocity 0.5cm/s.
Preferably, the diameter r≤0.5mm of described loophole 5, it is preferred that r=0.2mm.
Described second light path module 17 includes array of photoswitch collimating module 10, form protective shield 11 to be measured and scaling board
12。
Described second road light sequentially passes through array of photoswitch collimating module 10, after form protective shield 11 to be measured and scaling board 12
Return.
Described array of photoswitch collimating module 10 has the light output of N*M road, N >=1, M >=1.
Preferably, array of photoswitch collimating module 10 is uniformly distributed N road in the horizontal direction, is vertically uniformly distributed M
Road, and N=8, M=8.
Wherein in an embodiment, array of photoswitch collimating module 10 has N road light and exports the most respectively.
Preferably, the N road light of array of photoswitch collimating module 10 exports simultaneously and measures.
Described scaling board 12 reflects the surface smoothness≤1um of described second road light.
Fig. 2 explanation is according to the measuring method flow chart of the various exemplary embodiments of the present invention.
Fig. 2 exemplarily illustrates the method step flow process implementing to measure form protective shield, including:
S1, light source sends measuring beam, and it is identical that light source 1 sends frequency, and the light that direction of vibration is identical, i.e. coherent light.
Preferably, the coherent light that light source 1 is sent coherence length within coherence time is comparatively short, between 40-80nm, more excellent
The a length of 55-65nm of coherent light of choosing, most preferred coherence length is 60nm.
S2, measuring beam is decomposed into first via light and the second road light by fiber coupler.
S3, first via light is by returning after the first light path module；Second road light is returned by the second light path module.
Described first light path module 16 includes lens a, lens b, loophole 5, lens c, lens d, reflecting mirror 8 and controls
The mobile module 9 that described reflecting mirror 8 moves.
Described first via light sequentially passes through after lens a, lens b, loophole 5, lens c, lens d, reflecting mirror 8 through reflection edge
Road returns.Described reflecting mirror 8 is fixed on described mobile module 9, and utilizes described mobile module 9 to carry out at the uniform velocity back and forth movement.
Preferably, described mobile module 9 is the horizontal reciprocating device that linear electric motors control.
Preferably, described horizontal reciprocating distance L=5-30cm.
Preferably, described is at the uniform velocity 0.5cm/s.
Preferably, the diameter r≤0.5mm of described loophole 5, it is preferred that r=0.2mm.
Described second light path module 17 includes array of photoswitch collimating module 10, form protective shield 11 to be measured and scaling board
12。
Described second road light sequentially passes through array of photoswitch collimating module 10, after form protective shield 11 to be measured and scaling board 12
Return.
Described array of photoswitch collimating module 10 has the light output of N*M road, N >=1, M >=1.
Preferably, array of photoswitch collimating module 10 is uniformly distributed N road in the horizontal direction, is vertically uniformly distributed M
Road, and N=8, M=8.
Wherein in an embodiment, array of photoswitch collimating module 10 has N road light and exports the most respectively.
Preferably, the N road light of array of photoswitch collimating module 10 exports simultaneously and measures.
Described scaling board 12 reflects the surface smoothness≤1um of described second road light.
After S4, first via light and the second road light return through fiber coupler, optical signal is measured in output.
S5, measures optical signal and enters photoelectric detection module, and the signal of telecommunication is measured in output.
S6, the measurement signal of telecommunication enters computer after processing of circuit module and is calculated and be shown.
Preferably, described computer calculates form protective shield certain point measured value according to the described measurement signal of telecommunication, described
Measured value includes form protective shield front surface signal, form protective shield rear surface signal, and scaling board signal.
Therefore, utilize the present invention front surface and rear surface to form protective shield to measure simultaneously, obtain high-precision
The measured value of degree, can be effectively improved measurement efficiency.
Preferably, described computer calculates form protective shield certain point measured value according to the described measurement signal of telecommunication, described
Measured value includes the thickness of form protective shield.
Therefore, utilize the present invention can measure the thickness of form protective shield, form protective shield can be reflected according to thickness
Relative homogeneity, is conducive to the assurance to production batch quality.
Preferably, described computer calculates form protective shield certain point measured value according to the described measurement signal of telecommunication, described
Measured value includes that the some distance to scaling board measured by form protective shield.
Therefore, even if the position that form protective shield is put not is to be perpendicular to array of photoswitch collimator apparatus, scaling board is at electricity
Brain process can interpolate that out as datum level the placement location of form protective shield, thus ensure the measurement in factorial praluction
Efficiency.
Fig. 3 explanation measures form protective shield certain point signal results according to the displaying of the various exemplary embodiments of the present invention
Figure.
In figure, 3 Gaussian peaks are respectively form protective shield front surface signal, form protective shield rear surface signal, scaling board letter
Number, the distance conversion of 3 Gaussian peaks can draw the thickness of this point of form protective shield and this point of form protective shield and scaling board away from
From.
Fig. 4 explanation is according to the displaying computer matching form protective shield plane graph of the various exemplary embodiments of the present invention.
Processed by computer and obtain the thickness of form protective shield difference and form protective shield difference and scaling board
Distance, utilizes computer can simulate the plane graph of form protective shield and the datum level of scaling board.Three planes are divided from top to bottom
It not form protective shield front surface, form protective shield rear surface, scaling board.Plane graph according to the form protective shield simulated can
Calculate the flatness of form protective shield.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. the measuring method measuring form protective shield flatness, it is characterised in that including:
S1, light source sends measuring beam；
S2, measuring beam is decomposed into first via light and the second road light by fiber coupler；
S3, first via light is by returning after the first light path module；Second road light is returned by the second light path module；
After S4, first via light and the second road light return through fiber coupler, optical signal is measured in output；
S5, measures optical signal and enters photoelectric detection module, and the signal of telecommunication is measured in output；
S6, the measurement signal of telecommunication enters computer after processing of circuit module and is calculated and be shown.
2. measuring method as claimed in claim 1, it is characterised in that described measuring beam is coherent light, and coherence length is
60nm。
3. measuring method as claimed in claim 1, it is characterised in that described first light path module includes lens a, lens b, thoroughly
Unthreaded hole, lens c, lens d, reflecting mirror and control the mobile module that described reflecting mirror moves, described first via light sequentially passes through
Return along road through reflection after lens a, lens b, loophole, lens c, lens d, reflecting mirror.Described reflecting mirror is fixed on described shifting
On dynamic model block, and described mobile module is utilized to carry out at the uniform velocity back and forth movement.
4. measuring method as claimed in claim 3, it is characterised in that described mobile module is the level that linear electric motors control
Reciprocating apparatus.
5. measuring method as claimed in claim 3, it is characterised in that the diameter r≤0.5mm of described loophole 5.
6. measuring method as claimed in claim 4, it is characterised in that described horizontal reciprocating distance L=5-30cm.
7. measuring method as claimed in claim 1, it is characterised in that described second light path module includes that array of photoswitch collimates
Module, form protective shield to be measured and scaling board, described second road light sequentially passes through array of photoswitch collimating module, and form to be measured is prevented
Return after protecting screen and scaling board.
8. measuring method as claimed in claim 7, it is characterised in that described array of photoswitch collimating module has N*M road light
Output, N >=1, M >=1.
9. measuring method as claimed in claim 8, it is characterised in that array of photoswitch collimating module has N road light and divides successively
Do not export.
10. measuring method as claimed in claim 7, it is characterised in that described scaling board reflects the surface of described second road light
Flatness≤1um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610512454.6A CN106052600A (en) | 2016-06-30 | 2016-06-30 | Method for measuring flatness of protective screen of window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610512454.6A CN106052600A (en) | 2016-06-30 | 2016-06-30 | Method for measuring flatness of protective screen of window |
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| Publication Number | Publication Date |
|---|---|
| CN106052600A true CN106052600A (en) | 2016-10-26 |
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ID=57201700
Family Applications (1)
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|---|---|---|---|
| CN201610512454.6A Pending CN106052600A (en) | 2016-06-30 | 2016-06-30 | Method for measuring flatness of protective screen of window |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247954A (en) * | 2016-09-23 | 2016-12-21 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of femtosecond laser measuring motion based on frequency conversion principle of interference and method |
| CN109870132A (en) * | 2017-12-04 | 2019-06-11 | 深圳市盛世智能装备有限公司 | It is a kind of for the measurement of planeness when altimetric compensation method |
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| CN104296698A (en) * | 2014-10-27 | 2015-01-21 | 广州飞拓优视光电科技有限公司 | Method for measuring evenness of optical surface with ultrahigh precision |
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| CN1387058A (en) * | 2002-05-16 | 2002-12-25 | 上海交通大学 | NxM-array light switch |
| CN101054772A (en) * | 2007-05-21 | 2007-10-17 | 江苏俊峰纺织机械有限公司 | Detection device for woollen knitted fabric post-finishing processing evenness |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106247954A (en) * | 2016-09-23 | 2016-12-21 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of femtosecond laser measuring motion based on frequency conversion principle of interference and method |
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