CN103105285B - Shadow-rejection based test method and test instrument for optical fiber panel limiting resolution - Google Patents
Shadow-rejection based test method and test instrument for optical fiber panel limiting resolution Download PDFInfo
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- CN103105285B CN103105285B CN201310023618.5A CN201310023618A CN103105285B CN 103105285 B CN103105285 B CN 103105285B CN 201310023618 A CN201310023618 A CN 201310023618A CN 103105285 B CN103105285 B CN 103105285B
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- integrating sphere
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Abstract
The invention discloses a shadow-rejection based test instrument for optical fiber panel limiting resolution. The shadow-rejection based test instrument for the optical fiber panel limiting resolution comprises a standard light source (1), a steady current source (2) of the standard light source (1), a collection lens (3), an integrating sphere (4), a moving mechanism of the integrating sphere (4), a resolution target (5) and a charge coupled device (DDC) data acquisition and microcomputer processing system (8). The resolution target (5) is arranged on a uniform diffusion export of the integrating sphere (4). The invention further discloses shadow-rejection based test method for the optical fiber panel limiting resolution. The shadow-rejection based test method and test instrument for optical fiber panel limiting resolution supplement blank of a test technology for the existing optical fiber panel limiting resolution, use a resolution target rejection shadow point for measuring limiting resolution of each part of an optical fiber panel accurately and systemically, can give resolution distribution of all parts of different optical fiber panels, and can further locate a shadow coordinate existing on the optical fiber panel exists.
Description
Technical field
The present invention relates to the optical instrument of limiting resolution of a kind of measuring optical fiber panel, optical lens, be specifically related to a kind of proving installation of the resolution based on shadow compensation principle, belong to optical field.
background technology
It is high that fibre faceplate has optical transmission efficiency, and interstage coupling loss is little, passes as clear, true, has the features such as zero thickness.Be widely used in various cathode-ray tube (CRT), pick-up tube, CCD is coupled and other need to transmit in the instrument and equipment of image.Fibre faceplate is the user terminal product realizing fiber to the desk solution, and internal space design is reasonable.Thus some families and workspace is moved towards gradually.Good and the bad resolution with this panel of fibre faceplate is undivided, and therefore it is also proposed test needs to the parameter of its limiting resolution.Due to the impact (as infrared response, temperature etc.) of fibre faceplate various uncontrollable factor in actual manufacture process, fibre faceplate can produce the flaw point of some, be referred to as shadow, therefore must find out these shadow points when the resolution of measuring optical fiber panel.The domestic research also not carrying out fibre faceplate shadow detection method in a deep going way at present, and the technology of the limiting resolution of system testing fibre faceplate various piece is almost nil.And the detection of shadow in detection fiber panel is had a kind ofly cry the detection utilizing optimum operator Canny operator to realize shadow.But there is following problem in the program:
1) Canny operator goes close to practical problems by the method for mathematical simulation, and its positioning precision and width cannot describe intuitively.
2) to contain Gaussian filter parameter and standard poor for the call statement of Canny operator, and the ratio of Low threshold and high threshold, high threshold accounts for the ratio of total number of image pixels, and several parameter not only cannot uniquely be determined, but also there is certain human factor.
3) not only there is additive noise in resolution image, also there is multiplicative noise, Canny operator cannot solve multiplicative noise.
Summary of the invention
In order to solve the above-mentioned technical matters existed in prior art, the invention provides a kind of fibre faceplate limiting resolution testing tool of rejecting based on shadow, comprise: standard sources and constant-current source thereof, condenser, integrating sphere and travel mechanism thereof, resolution target, and ccd data collection and microprocessor system, described resolution target is arranged in the even diffusion outlet of described integrating sphere.
Further, described standard sources is bromine tungsten filament lamp, and constant-current source is the very high direct supply of precision.
Further, described condenser is quartz condensing-lens.
Further, described standard sources is less than the focal length of condenser apart from the distance of described condenser.
Further, described integrating sphere is the hollow ball that inside scribbles without the wavelength optionally whitewash of diffuse.
Further, described travel mechanism is the metal slide unit connected together with described integrating sphere, and its periphery indicates scale.
Further, testing fiber panel is arranged between described resolution target and the even diffusion outlet of described integrating sphere.
Further, also comprise microscopic observation system, this microscopic observation system is with CCD interface, and described testing fiber panel aimed at by its object lens.
Further, also comprise Z axis travel mechanism, be used for adjusting micro objective Z axis position.
Present invention also offers a kind of fibre faceplate limiting resolution method of testing rejected based on shadow, comprise the steps:
Testing fiber panel is arranged between resolution target and the even diffusion outlet of integrating sphere;
Standard sources sends monochromatic light through condenser, then injects a compensating port of described integrating sphere;
Afterwards, there is diffuse reflection and penetrate from another compensating port of integrating sphere in incident light in described integrating sphere;
Again transmitted through described testing fiber panel and resolution target to microcobjective.
At any time, the current potential of any point in described resolution target
determined by two-dimentional Laplace's equation and corresponding boundary condition:
；
；
；
Wherein
for the thickness of resolution target,
for the distribution of resolution target surface potential,
for target pressure;
Due to
have
meet a two-dimentional Laplce side linear superposition with homogeneous boundary condition respectively can derive its final expression formula and be:
，
Wherein
be respectively
derivation coefficient,
hyperbolic sine function, in addition
, C is the contrast of target, and I is current photocurrent,
for the reference current of target;
When somewhere exists shadow point, this place's electromotive force is zero, uniquely can determine the coordinate of x, y.
Fibre faceplate limiting resolution method of testing based on shadow rejecting of the present invention and instrument supplement the current blank to fibre faceplate limiting resolution measuring technology, a kind of resolution target is utilized to reject the limiting resolution of the next accurate systematic survey fibre faceplate various piece of shadow point, the resolution distribution of different fiber panel various piece can be provided, the shadow coordinate that fibre faceplate exists can also be oriented.
Compared with prior art, beneficial effect of the present invention is as follows:
1) ultimate resolution of fibre faceplate zones of different is directly judged by micro-Visualization system, more more directly perceived than traditional method, operate also relatively simple;
2) resolution target rejects shadow, solves the indeterminable problem of fibre faceplate resolution;
3) give the measurement of the limiting resolution of fibre faceplate different piece, the shadow position of panel can be provided accurately.
Accompanying drawing explanation
Fig. 1 is the structural representation of the fibre faceplate limiting resolution testing tool based on shadow rejecting of the present invention;
Fig. 2 is the sectional view of resolution target.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, fibre faceplate limiting resolution testing tool of rejecting based on shadow of the present invention comprises standard sources 1 and constant-current source 2 thereof, condenser 3, integrating sphere 4 and travel mechanism thereof, resolution target 5, microscopic observation system 6 and Z axis travel mechanism 7, ccd data collection and microprocessor system 8 form.
Described standard sources 1 and constant-current source 2 part thereof are the light-source system of the very high direct supply of a kind of bromine tungsten filament lamp and precision, and the intensity of light source output light and colour temperature are stablized.This standard sources 1 must completely cut off with external light source, therefore must carry out in camera bellows at a certain temperature.
Described condenser 3 is quartz condensing-lens, and its quartzy purity is higher, not easily affects the refraction angle of light.Its from standard sources 1 one fixed range arrange, this distance is less than the focal length of condenser 3, and light source along optical axis direction projection just in condenser 3 in the heart.
Described integrating sphere 4 is hollow balls that inside scribbles without the wavelength optionally whitewash of (evenly) diffuse, and integrating sphere has two compensating ports, and one of them exports light entrance for condenser 3, and another is even diffusion outlet.Integrating sphere 4 is arranged in travel mechanism, and travel mechanism is the metal slide unit tightly connected together with integrating sphere, and its periphery all indicates scale, and integrating sphere 4 can all around be moved smoothly in X-Y plane.
Testing fiber panel 9 and resolution target 5 are close together, and wherein resolution target 5 is standard resolution targets, and its resolution strip width is even, and light and shade contrast is more than 90%.
Described microscopic observation system 6 is a kind of optical microscope, with CCD interface in this microscope, can pass through MICROCOMPUTER PROCESSING.Testing fiber panel 9 aimed at by microscopical object lens.Described Z axis travel mechanism 7 is a kind of peripheral servicing unit adjusting microscope focus.
Described ccd data collection and microprocessor system 8 comprise ccd image capture card and microcomputer platform, and ccd image capture card is positioned at microscopical interface connection, can transfer the analog quantity of viewed picture to digital quantity.Microcomputer can carry out overall treatment, as operations such as shadow location, optimum configurations, drawing image, printing reports to the data transmitted.
Light path of the present invention is that standard sources 1 sends monochromatic light through condenser 3, then a compensating port of integrating sphere 4 is injected, there is diffuse reflection and penetrate from another compensating port of integrating sphere in incident light afterwards in integrating sphere, again transmitted through testing fiber panel 9, again from resolution target 5 to microcobjective, be transmitted into eyepiece by microcobjective, finally enter the eyeball of people again.
Standard sources 1 and constant-current source 2 provide 2856K light to have intensity and the stable standard light of colour temperature, through condenser 3, due to the optically focused effect of condenser 3, now light source is converged, regulate the XY coordinate of the metal decking of integrating sphere 4 times travel mechanisms again, make the light of convergence through a compensating port of integrating sphere, enter integrating sphere inside, integrating sphere is by the resolution target 5 in even for homogenizer diffusion back lighting diffusion exit.
As shown in Figure 2, at any time, the electromotive force of resolution target 5 and Z axis have nothing to do, and can turn to two-dimensional problems to calculate, therefore the current potential of any point in target
must be determined by two-dimentional Laplace's equation and corresponding boundary condition:
；
；
；
Wherein
for the thickness of resolution target 5,
for the distribution of target surface potential,
for target pressure.Due to
can have
meet a two-dimentional Laplce side linear superposition with homogeneous boundary condition respectively can derive its final expression formula and be:
，
Wherein
be respectively
derivation coefficient,
hyperbolic sine function, in addition
, C is the contrast of target, and I is current photocurrent,
for the reference current of target, in order to maintain higher precision, the resolution target adopting contrast to be greater than 90%, now can ignore the impact that its charge leakage causes.When this place exists shadow point, this place's electromotive force is zero, and therefore the method uniquely can determine the coordinate of x, y.With the Z coordinate adjusting microcobjective manually or automatically, amplified by local panel pattern as, microcobjective clearly until can be observed by microscope ocular, micro-eyepiece is directly observed for human eye.Meanwhile, with CCD interface in microscopic observation system, be equipped with the simulated data that CCD capture card gathers image, calculate the result needed for exporting through MICROCOMPUTER PROCESSING.
Actual conditions according to the parameter request of light panel resolution, can have two kinds of ways:
1) change micro-enlargement factor eyepiece (10X, 16X etc.) and achromatic eyepiece (5X, 10X, 40X etc.), observed by micro-eyepiece, directly judge the resolving power of fibre faceplate zones of different;
2) as wanted the data image of quantitative, CCD interface can be connected with peripheral computer equipment.The form of aggregation of data parameter is exported by ccd data collection, computing.
Claims (6)
1. a fibre faceplate limiting resolution testing tool of rejecting based on shadow, comprise: standard sources (1) and constant-current source (2) thereof, condenser (3), integrating sphere (4) and travel mechanism thereof, resolution target (5), with ccd data collection and microprocessor system (8), it is characterized in that: described resolution target (5) is arranged in the even diffusion outlet of described integrating sphere (4); Testing fiber panel (9) arranges between described resolution target (5) and the even diffusion outlet of described integrating sphere (4); Described condenser (3) is quartz condensing-lens.
2., as claimed in claim 1 based on the fibre faceplate limiting resolution testing tool that shadow is rejected, it is characterized in that: described standard sources (1) is less than the focal length of condenser (3) apart from the distance of described condenser (3).
3. as claimed in claim 1 based on the fibre faceplate limiting resolution testing tool that shadow is rejected, it is characterized in that: described integrating sphere (4) is the hollow ball that inside scribbles without the wavelength optionally whitewash of diffuse.
4., as claimed in claim 1 based on the fibre faceplate limiting resolution testing tool that shadow is rejected, it is characterized in that: described travel mechanism is the metal slide unit connected together with described integrating sphere (4), and its periphery indicates scale.
5. as claimed in claim 4 based on the fibre faceplate limiting resolution testing tool that shadow is rejected, it is characterized in that: also comprise microscopic observation system (6), this microscopic observation system (6) is with CCD interface, and described testing fiber panel (9) aimed at by its object lens.
6., based on the fibre faceplate limiting resolution method of testing that shadow is rejected, comprise the steps:
Testing fiber panel (9) is arranged between resolution target (5) and the even diffusion outlet of integrating sphere (4);
Standard sources (1) sends monochromatic light through condenser (3), then injects a compensating port of described integrating sphere (4);
Afterwards, there is diffuse reflection and penetrate from another compensating port of integrating sphere (4) in incident light in described integrating sphere (4);
Again transmitted through described testing fiber panel (9) and resolution target (5) to microcobjective,
At any time, the current potential of described resolution target (5) interior any point
determined by two-dimentional Laplace's equation and corresponding boundary condition:
；
；
；
Wherein
for the thickness of resolution target (5),
for the distribution of resolution target (5) surface potential,
for target pressure;
Due to
have
meet a two-dimentional Laplce side linear superposition with homogeneous boundary condition respectively can derive its final expression formula and be:
，
Wherein
be respectively
derivation coefficient,
it is hyperbolic sine function;
When somewhere exists shadow point, this place's electromotive force is zero, uniquely can determine the coordinate of x, y.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310023618.5A CN103105285B (en) | 2013-01-22 | 2013-01-22 | Shadow-rejection based test method and test instrument for optical fiber panel limiting resolution |
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| CN201310023618.5A CN103105285B (en) | 2013-01-22 | 2013-01-22 | Shadow-rejection based test method and test instrument for optical fiber panel limiting resolution |
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| CN103105285A CN103105285A (en) | 2013-05-15 |
| CN103105285B true CN103105285B (en) | 2015-03-18 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104065957B (en) * | 2014-06-13 | 2016-08-24 | 中国科学院西安光学精密机械研究所 | Camera resolving power testing device and method |
| CN109297986B (en) * | 2018-11-05 | 2023-02-24 | 西安工业大学 | Laser gyroscope high reflector surface defect parameter characterization device and detection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051248A (en) * | 1989-10-24 | 1991-05-08 | 华东工学院 | Tester for amount of information on optical fibre panel |
| CN102538706A (en) * | 2010-11-19 | 2012-07-04 | 株式会社高永科技 | Method and apparatus of profiling surface |
| CN202533381U (en) * | 2012-05-19 | 2012-11-14 | 东北石油大学 | Automatic detection system for defects of fiber faceplate |
| CN202548063U (en) * | 2012-05-21 | 2012-11-21 | 东北石油大学 | System for automatically acquiring light-transmitting image of optic fiber plate |
| CN203069356U (en) * | 2013-01-22 | 2013-07-17 | 中国计量学院 | Fibre faceplate limiting resolution test instrument based on shade elimination |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4861663B2 (en) * | 2005-09-07 | 2012-01-25 | 株式会社アドバンテスト | Measuring apparatus, method, program, and recording medium |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051248A (en) * | 1989-10-24 | 1991-05-08 | 华东工学院 | Tester for amount of information on optical fibre panel |
| CN102538706A (en) * | 2010-11-19 | 2012-07-04 | 株式会社高永科技 | Method and apparatus of profiling surface |
| CN202533381U (en) * | 2012-05-19 | 2012-11-14 | 东北石油大学 | Automatic detection system for defects of fiber faceplate |
| CN202548063U (en) * | 2012-05-21 | 2012-11-21 | 东北石油大学 | System for automatically acquiring light-transmitting image of optic fiber plate |
| CN203069356U (en) * | 2013-01-22 | 2013-07-17 | 中国计量学院 | Fibre faceplate limiting resolution test instrument based on shade elimination |
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