CN109444086A - For calibrating the standard component and method of light transmittance detection device - Google Patents
For calibrating the standard component and method of light transmittance detection device Download PDFInfo
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- CN109444086A CN109444086A CN201811103357.7A CN201811103357A CN109444086A CN 109444086 A CN109444086 A CN 109444086A CN 201811103357 A CN201811103357 A CN 201811103357A CN 109444086 A CN109444086 A CN 109444086A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
- G01N21/274—Calibration, base line adjustment, drift correction
- G01N21/278—Constitution of standards
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Abstract
The invention discloses a kind of for calibrating the standard component and method of light transmittance detection device.The standard component includes light-shielding substrate and light-transmitting plate, further includes at least one shading baffle；Hollowed-out translucent area is formed on the light-shielding substrate, the light-transmitting plate lid is located on the light-shielding substrate, and the light-transmitting plate closes the hollowed-out translucent area, and the light of light transmittance detection device penetrates the hollowed-out translucent area, to measure the area of transmission region；The shading baffle is configured to be placed on the light-transmitting plate at position corresponding with the hollowed-out translucent area, with hollowed-out translucent area described in partial occlusion.The standard component is configured to make the light of light transmittance detection device through the hollowed-out translucent area, to measure the area of transmission region.
Description
Technical field
The invention belongs to light transmittance detection technique fields, in particular it relates to a kind of for calibrating light transmittance detection
The standard component and method of equipment.
Background technique
The relevant technologies of consumer electronics product are quickly grown in recent years, the electronic equipments such as mobile phone, tablet computer by
It is widely applied in daily life, applied environment is more and more diversified.But it is interfered, foreign matter
A possibility that the problems such as invasion, also obviously rises.In this case it is necessary to have higher reliability, electronics can be met
Application demand of the product in various environment.
Microspeaker is the important electronic device in electronic product, is used to convert electrical signals to sound.In order to right
The internal structure of Microspeaker and electronic product is protected, and the outlet sound mouth of Microspeaker and/or is let out acoustic aperture and can be attached
There is acoustics screen cloth.The characteristics such as the air penetrability of acoustics screen cloth itself directly affect the acoustical behavior of Microspeaker.
In order to which the air penetrability to acoustics screen cloth is managed, guarantees processing, the consistency of performance of acoustics screen cloth, need to sound
Screen cloth is learned to be detected.In the prior art, using the form of light transmittance detection to the hole density degree of acoustics screen cloth, hole
Area is detected, and then is able to reflect the acoustical behavior of acoustics screen cloth.But there are notable defects for existing test mode.The
One, existing test generallys use actual product as testing standard part, but the hole error of actual product is larger and unstable, real
Border product is influenced by temperature, standing time, floating dust etc., is easy to appear the phenomenon of test inaccuracy.Second, each light transmittance inspection
Measurement equipment is since there are the influence of the factors such as machine error, focal length difference, examination criteria is had differences.Each light transmittance detection is set
The detection of the standby light transmittance to acoustics screen cloth is different, causes the limited reliability of testing result.
Summary of the invention
It is an object of the present invention to provide a kind of schemes of improved calibration light transmittance detection device.
According to an aspect of the invention, there is provided a kind of for calibrating the standard component of light transmittance detection device, comprising:
Light-shielding substrate and light-transmitting plate further include at least one shading baffle；Hollowed-out translucent area is formed on the light-shielding substrate, it is described
Tabula rasa lid is located on the light-shielding substrate, and the light-transmitting plate closes the hollowed-out translucent area, and the light of light transmittance detection device is saturating
The hollowed-out translucent area is crossed, to measure the area of transmission region；The shading baffle is configured to be placed on the light-transmitting plate
At upper position corresponding with the hollowed-out translucent area, with hollowed-out translucent area described in partial occlusion.
Optionally, the area of the shading baffle is equal to the one third or a quarter of the area in hollowed-out translucent area, institute
Stating standard component includes two to four pieces of shading baffles.
Optionally, the scale error of the hollowed-out translucent area and the shading baffle is less than 0.008mm.
Optionally, the scale error of the hollowed-out translucent area and shading baffle is less than or equal to 0.005mm.
Optionally, the hollowed-out translucent area is formed on the light-shielding substrate using Milling Process.
Optionally, shading baffle is formed with light-transmitting gap apart from the hollowed-out translucent area edge.
Optionally, it is formed with holding tank on the surface of the correspondence of the light-shielding substrate light-transmitting plate, the light-transmitting plate is embedding
In the holding tank, the surface of the upper surface of the light-transmitting plate light-transmitting plate corresponding with the light-shielding substrate is flushed, institute
Hollowed-out translucent area is stated to be formed in the holding tank.
Optionally, the light-transmitting plate is adhered on a side surface of the light-shielding substrate.
Optionally, light-transmitting plate is colourless acrylic light-transmitting plate.
The present invention also provides a kind of method for calibrating light transmission detection device, the method uses above-mentioned standard component, root
Intended pixel data are preset according to the area in the hollowed-out translucent area of the standard component, standard component is placed on light transmittance inspection
In measurement equipment, so that light transmittance detection device is obtained test pixel data, light transmittance detection device is adjusted, is made obtained
Test pixel data are consistent with intended pixel data.
Of the invention one has technical effect that, the standard component that light transmittance detection device can provide through the invention into
Row calibration effectively meets the reproducibility of standard component so that each light transmittance detection device be made to have unified examination criteria；
Meanwhile the setting of shading baffle, multi gear position confirmation when light transmittance equipment Alignment may be implemented, guarantee the accuracy of calibration.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
The attached drawing for constituting part of specification describes the embodiment of the present invention, and together with the description for solving
Release the principle of the present invention.
Fig. 1 is the overlooking structure diagram for the standard component that the specific embodiment of the invention provides；
Fig. 2 is the side cross sectional views for the standard component that the specific embodiment of the invention provides；
Fig. 3 is the step schematic diagram of calibration method provided by the invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology and equipment known to person of ordinary skill in the relevant may be not discussed in detail, but in appropriate situation
Under, the technology and equipment should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
The present invention provides a kind of standard component, which has reliable, on-deformable structure, light transmittance detection
Equipment can be calibrated by being detected to the standard component with the testing conditions to itself.
As shown in Figure 1, 2, the standard component for calibrating light transmittance detection device of the invention includes light-shielding substrate 1, thoroughly
Tabula rasa 2 and at least one shading baffle 3.Light-shielding substrate 1 is made of lighttight material, is formed on light-shielding substrate 1 a piece of
The region of hollow out, the region can be such that light passes through.Fig. 1 and 2 show position of the hollowed-out translucent area 11 on light-shielding substrate 1 and
Shape, in this embodiment, the hollowed-out translucent area 11 are located at the central area of the light-shielding substrate 1, and the hollow out is saturating
11 rectangular shaped of light area.The central area that light-shielding substrate is arranged in hollowed-out translucent area can be made to the structure of light-shielding substrate entirety
Reliability is higher, is less susceptible to the case where deforming, damaging.According to existing processing technology mode, hollowed-out translucent area is designed
It is rectangular to have higher accuracy to size, so that more accurate to the calibration of light transmittance detection device.The present invention is simultaneously
The position at the shape to hollowed-out translucent area and place is not limited strictly, can be adjusted according to the needs of actual conditions.
As shown in Fig. 2, the lid of light-transmitting plate 2 is located on the light-shielding substrate 1, the light-transmitting plate 2 will be on light-shielding substrate 1
The whole region in hollowed-out translucent area 11 covers, to close the hollowed-out translucent area 11.The light-transmitting plate, which uses, is capable of light transmission
Material is made, therefore light still can be from the hollowed-out translucent area through the light-transmitting plate transmissive.
When reality calibrates light transmittance detection device, the light of equipment can be made from the side of standard component through engraving
The other side of standard component is transmitted at empty transparent area and light-transmitting plate, other regions are then blocked by the light-shielding substrate, Wu Fatou
Cross light.In the other side of standard component, the hot spot of transmission can be shot by video camera or other capture apparatus, into
And the area of transmission region is calculated by pixel data.Different light transmittance detection devices is missed due to the Automatic manual transmission being individually present
The reasons such as difference, focus errors may cause taken pixel quantity difference, and then the face for the transmission region being calculated
Product is also different.Before carrying out calibration test, a mark can be designed previously according to the real area size in the hollowed-out translucent area
Quasi- intended pixel data.The real area for corresponding to the hollowed-out translucent area, should shoot how many a pixels.Later,
When actually carrying out calibration test, test pixel data, i.e. actual photographed can be actually photographed by light transmittance detection device
The pixel number arrived.Test pixel data are compared with intended pixel data, if the two is inconsistent or gap has exceeded
Error range is then adjusted tested light transmittance detection device, such as focuses, shoots between camera and plummer
Relative position etc..Finally, the test pixel data that light transmittance detection device is taken it is consistent with intended pixel data or
Difference is within the error range.
Above-mentioned calibration operation is carried out to each need light transmittance detection device to be used, each light transmittance detection can be made to set
Standby test performance is consistent, and improves the consistency of the detection to acoustics screen cloth.
The technical effects of the invention are that the structural reliability of the standard component is high, it is not susceptible to deformation, damage is asked
It inscribes and easy to use, is capable of the calibration of effective auxiliary light transmission rate detection device progress light transmittance detection.In existing technology
In, present inventor it is contemplated that the entrant sound screen cloth processed as standard component to light transmittance detection device into
Row calibration detection.But entrant sound screen cloth easily deforms, the planform of hole easily deforms to cause the mark of calibration
Standard changes.Moreover, entrant sound screen cloth once falls dust or foreign matter, it is difficult to be cleared up, foreign matter can seriously affect entrant sound net
The light transmittance of cloth, so that the standard of calibration be caused to change.Entrant sound net in the product is embedded by injection molding
Cloth suffers from the influence of the factors such as over-voltage joint force, and certain change has had occurred in the design feature of entrant sound screen cloth.Therefore, such as
Fruit completes the entrant sound screen cloth after processing as calibration standard component using this, be easy to cause the entrant sound screen cloth performance of subsequent production not
Unanimously, it is difficult to realize that performance is managed.Compared with the existing technology, standard component reliability provided by the invention is significantly improved,
It is more suitable for large batch of production and processing.Even if standard component Reusability is placed a period of time, it is unaffected,
Hollowed-out translucent area is unlikely to deform.If falling foreign matter on light-transmitting plate, foreign matter can also be removed by cleaning means, guarantee standard group
The glazed area of part does not change.
The shading baffle 3 is made of lighttight material.As shown in Figure 1, 2, the area of the shading baffle 3 is less than institute
The area in hollowed-out translucent area 11 is stated, the shading baffle 3 can be placed on the light-transmitting plate 2, so that a part of hollow out is saturating
Light area 11 covers.It the region covered by shading baffle 3 can not transmitted light.In practical applications, it is set to light transmittance detection
It, can be in region corresponding with hollowed-out translucent area 11 after being adjusted such that test pixel data are consistent with intended pixel data
Upper cover sets shading baffle 3, makes the area in the region of light transmission on standard component that controllable variation occur.And then make toning
The light transmittance test equipment of section obtains new test pixel data.By new test pixel data and the test pixel that obtains before
Data or intended pixel data are compared, and whether the difference both compared matches with the variable quantity of the area of transmission region.
If matched, there is no problem for description standard component, tested light transmittance detection device also calibrated to scheduled state.Phase
Instead, if mismatch, it is a kind of may be standard component light-transmitting plate corresponding with hollowed-out translucent area on may there is foreign matter to block
Or there is scratch；Alternatively possible is that tested light transmittance detection device has exception, needs further to check.By using standard
Shading baffle, the accuracy of calibration can be further increased.The area of the shading baffle can carry out according to the actual situation
Design, the present invention limit not to this.
Optionally, the area of the shading baffle is less than or equal to the one third of the area in hollowed-out translucent area.In this way, mark
Prospective component may include at least two pieces of shading baffles.When carrying out retest, on light-transmitting plate twice in succession on light-transmitting plate
It is additional to place shading baffle, gradually glazed area can be made to reduce.Additional shading baffle of placing obtains primary test picture every time
Prime number evidence, by the conversion process of test pixel data with gradually add process that shading baffle is gradually reduced glazed area into
Row compares, and also capable of further verifying light transmittance detection device, whether accurate alignment, standard component and equipment are with the presence or absence of failure
Or unusual condition.Optionally, the area in hollowed-out translucent area is the integral multiple of the area of shading baffle.For example, the shading baffle
Area be equal to hollowed-out translucent area area one third or a quarter.The present invention is not intended to limit in the standard component and wraps
Include several pieces of shading baffles.It optionally, may include two pieces to four pieces shading baffles in the standard component.It is being calibrated
When test, all or part of successively additional lid of two pieces to four pieces shading baffles can be located in hollowed-out translucent area.
The accuracy to size in the hollowed-out translucent area 11 has a major impact the calibration accuracy of light transmittance detection device, this
The scale error in the invention hollowed-out translucent area 11 should be less than 0.008mm.The ruler of the hollowed-out translucent area and shading baffle
Very little precision influences whether the accuracy of calibration, and the present invention provides optional scale error ranges, to reduce test pixel data
With the error between intended pixel data, to improve calibration accuracy.Optionally, the scale error of the shading baffle is less than
0.008mm.Preferably, in the case where processing conditions can reach, the scale error in the hollowed-out translucent area and shading baffle
Less than or equal to 0.005mm.
Preferably, the shading baffle being each placed on light-transmitting plate is integrally fully located in hollowed-out translucent area, rather than
Some covers the region other than hollowed-out translucent area.That is, being formed with light transmission between shading baffle and the edge in hollowed-out translucent area
Gap.Further, it is not also overlapped between every piece of shading baffle.In this way, one piece of shading baffle of every addition, hollowed-out translucent
The area that area is occluded and the area equal to shading baffle, the variation of glazed area and test pixel data should change linearly
Feature.Shading baffle area be less than or equal to hollowed-out translucent area area a quarter embodiment in, Neng Gougeng
The convenient upper mode of operation for realizing above-mentioned additional lid shading baffle.In the embodiment illustrated in fig. 2, the face of shading baffle 3
Product is equal to a quarter of the area in hollowed-out translucent area 11.
Optionally, as shown in Fig. 2, could be formed with receiving on a side surface of the correspondence light-transmitting plate of the light-shielding substrate 1
Slot 12, the light-transmitting plate 2 is then in the holding tank 12.It 2 upper surface of light-transmitting plate can be with pair of the light-shielding substrate 1
The surface of light-transmitting plate is answered to flush.Correspondingly, it as shown in Fig. 2, the hollowed-out translucent area 11 is then formed in the holding tank 12, engraves
The holding tank 12 is connected to by empty transparent area 11 with another side surface of light-shielding substrate 1.It, can using the design of the holding tank
Make the more compact structure of standard component, light-transmitting plate will not be outwardly protruded relative to light-shielding substrate.
Optionally, the light-transmitting plate is preferably colourless acrylic light-transmitting plate.Acrylic light-transmitting plate has good intensity
And hardness, it is not susceptible to deformation and is also not easy to be scratched.Also, colourless acrylic board has good light transmission.Using Asia
Gram force plate can be improved the accuracy of calibration, also can be improved the service life of standard component.The light-transmitting plate can be by viscous
The mode connect is fixed on a side surface of the light-shielding substrate；Alternatively, being formed with the embodiment party of holding tank on light-shielding substrate
In formula, the light-transmitting plate is fixed on the light-shielding substrate.
Preferably, the hollowed-out translucent area on the light-shielding substrate is formed by the way of Milling Process, and Milling Process can be with
Processing is executed by CNC numerically-controlled machine tool.Light-shielding substrate and shading baffle can be made of steel.The dimensional accuracy of Milling Process
It is higher, it can be improved the calibration accuracy of standard component.The shape of the hollowed-out translucent area and shading baffle can for rectangle or
Circle etc., the present invention limits not to this.
The present invention also provides a kind of methods for calibrating light transmittance detection device, and this method can be to light transmittance detection device
Detected status calibrated so that the obtained test structure of each equipment has consistent standard.This method is using this
The standard component provided is provided.As shown in figure 3, can be set first according to the area in the hollowed-out translucent area on standard component predetermined
Pixel data.For example, the hot spot through hollowed-out translucent area is shot, it is predetermined to take 25000 pixels.It
Afterwards, standard component is placed on light transmittance detection device to be calibrated.After the starting of light transmittance detection device, light can be from standard
The side of component is transmitted to the other side by hollowed-out translucent area and light-transmitting plate, and capture apparatus shoots hot spot, light transmittance from the other side
Detection device obtains test pixel data by calculating.For example, test pixel data may be 25700 pixels.Later, lead to
It crosses and light transmittance detection device is adjusted, so that the pixel data change that equipment is shot is 25000 pixels.
In this way, need to carry out unified calibration using light transmittance detection device to every, so that individual device
Examination criteria is consistent, improves the consistency of production line.The present invention is not intended to limit, and test pixel data must be with intended pixel data
Unanimously, as long as the two is within reasonable error range, it both may be considered that and be satisfactory or consistent.The error
Range can according to accuracy requirement, machining accuracy the case where artificially set, the present invention limits not to this.
Preferably, calibration steps of the invention further includes the steps that repeating to calibrate, and can further detect whether that calibration is quasi-
Really.Complete above-mentioned regulating step, after keeping test pixel data consistent with intended pixel data, on light-transmitting plate with hollowed-out translucent
Place shading baffle in corresponding region in area.Its total is preferably all covered on corresponding area, hollowed-out translucent area by shading baffle
On domain, in this way, the area of hollowed-out translucent Qu Shangneng light projector is reduced, reduced area is equal to the area of shading baffle.Later, it obtains
New test pixel data are taken, the test pixel data newly obtained are compared with intended pixel data, judge pixel quantity
Variable quantity it is whether suitable with the area of shading baffle.If the two is suitable, illustrate light transmittance detection device and standard component
There is no problem.If the two is not suitable, illustrating equipment, there may be the light-transmitting plate or hollow out of defect or standard component are saturating
There are foreign matter or scratch at light area.
The step of above-mentioned lid sets shading baffle and compares can repeat repeatedly, the shading gear that the additional lid of primary and secondary is set
Plate.And then whether the variation of statistical test pixel data is accuracy that is linear, being calibrated with determination.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that above example merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (10)
1. a kind of for calibrating the standard component of light transmittance detection device characterized by comprising light-shielding substrate and light-transmitting plate,
It further include at least one shading baffle；Hollowed-out translucent area is formed on the light-shielding substrate, the light-transmitting plate lid is located at the screening
On photopolymer substrate, the light-transmitting plate closes the hollowed-out translucent area, and the light of light transmittance detection device penetrates the hollowed-out translucent area,
To measure the area of transmission region；The shading baffle is configured to be placed on the light-transmitting plate and the hollowed-out translucent area
At corresponding position, with hollowed-out translucent area described in partial occlusion.
2. standard component according to claim 1, which is characterized in that the area of the shading baffle is equal to hollowed-out translucent area
Area one third or a quarter, the standard component include two to four pieces of shading baffles.
3. standard component according to claim 2, which is characterized in that the ruler in the hollowed-out translucent area and the shading baffle
Very little error is less than 0.008mm.
4. standard component according to claim 3, which is characterized in that the size of the hollowed-out translucent area and shading baffle is missed
Difference is less than or equal to 0.005mm.
5. standard component according to claim 1, which is characterized in that the hollowed-out translucent area is formed in using Milling Process
On the light-shielding substrate.
6. standard component according to claim 1, which is characterized in that shading baffle is apart from the hollowed-out translucent area edge shape
At there is light-transmitting gap.
7. standard component according to claim 1, which is characterized in that the table of the correspondence of the light-shielding substrate light-transmitting plate
Holding tank is formed on face, the light-transmitting plate is in the holding tank, the upper surface of the light-transmitting plate and the light-shielding substrate
The surface of the correspondence light-transmitting plate flush, the hollowed-out translucent area is formed in the holding tank.
8. standard component according to claim 1, which is characterized in that the light-transmitting plate is adhered to the one of the light-shielding substrate
On side surface.
9. standard component according to claim 1, which is characterized in that light-transmitting plate is colourless acrylic light-transmitting plate.
10. a kind of method for calibrating light transmittance detection device, the method using claim 1-9 it is one of any described in standard
Component, which is characterized in that intended pixel data are preset according to the area in the hollowed-out translucent area of the standard component, by standard
Component is placed in light transmittance detection device, so that light transmittance detection device is obtained test pixel data, to light transmittance detection device
It is adjusted, keeps test pixel data obtained consistent with intended pixel data.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811103357.7A CN109444086A (en) | 2018-09-20 | 2018-09-20 | For calibrating the standard component and method of light transmittance detection device |
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| CN201811103357.7A CN109444086A (en) | 2018-09-20 | 2018-09-20 | For calibrating the standard component and method of light transmittance detection device |
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