CN106940319B - Optical fiber image transmission element defect detection method and device - Google Patents
Optical fiber image transmission element defect detection method and device Download PDFInfo
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- CN106940319B CN106940319B CN201710294371.9A CN201710294371A CN106940319B CN 106940319 B CN106940319 B CN 106940319B CN 201710294371 A CN201710294371 A CN 201710294371A CN 106940319 B CN106940319 B CN 106940319B
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- 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
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- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- 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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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Abstract
the invention relates to a method and a device for detecting defects of an optical fiber image-transmitting element, which relate to the field of detection of the optical fiber image-transmitting element and mainly aim to improve the detection efficiency and the detection accuracy of the defects of the optical fiber image-transmitting element. The main technical scheme adopted is as follows: an optical fiber image transfer member defect detecting apparatus comprising: an optical fiber image transmission element placing area to be detected; the light source assembly irradiates light towards the first end face of the optical fiber image transmitting element to be detected in the optical fiber image transmitting element placing area to be detected; the image acquisition component acquires image information of the second end face of the optical fiber image transmission element to be detected; and the image analysis module is electrically connected with the image acquisition assembly, acquires the image information acquired by the image acquisition assembly and analyzes and judges the shape and size of the defects in the acquired image information. Compared with the manual naked eye distinguishing mode in the prior art, the distinguishing precision and the detection efficiency can be improved.
Description
Technical Field
the invention relates to the field of optical fiber image transmission element detection, in particular to a method and a device for detecting defects of an optical fiber image transmission element.
background
The optical fiber image transmission element is formed by arranging a plurality of optical fiber filaments according to a certain rule, and can be widely applied to photoelectric devices such as an image intensifier, an image intensified CCD, a particle detector and the like. By utilizing the principle of total reflection of the interface, an image can be transmitted from the first end face of one end of the optical fiber image transmitting element to the second end face of the other end of the optical fiber image transmitting element.
in the production of optical fiber image-transmitting members, there are often some defective products in which optical imaging defects such as spots (dark spots), chicken-silk defects, etc. are present. The size, the number and the shape of the defects directly determine the imaging quality of the optical fiber image transmission element, further influence the detection and recognition capability of an imaging device, and are key performance indexes influencing the practical use of the optical fiber image transmission element. Therefore, the defects are the necessary inspection items when the defects are delivered from the factory, and whether the defects reach the qualified standard or not is detected.
in the factory detection of the defects, imaging of a microscope is observed by naked eyes, the sizes and the shapes of the defects are judged by experience, and whether the products are qualified or not is judged according to corresponding specifications. Because the optical fiber image transmission element belongs to a precise part, the shape and the size of the defects are small, whether the defects are in a qualified size range or not is difficult to accurately distinguish by naked eyes, the detection result is unreliable, and the detection efficiency is low.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for detecting defects of an optical fiber image sensor, and mainly aims to improve the detection efficiency and the detection accuracy of defects of an optical fiber image sensor.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
in one aspect, embodiments of the present invention provide an optical fiber image transfer member defect detecting apparatus, including:
an optical fiber image transmission element placing area to be detected;
The light source assembly irradiates light towards the first end face of the optical fiber image transmitting element to be detected in the optical fiber image transmitting element placing area to be detected;
The image acquisition component acquires image information of the second end face of the optical fiber image transmission element to be detected;
and the image analysis module is electrically connected with the image acquisition assembly, acquires the image information acquired by the image acquisition assembly and analyzes and judges the shape and size of the defects in the acquired image information.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
optionally, the apparatus for detecting defects of an optical fiber image-transmitting element further includes:
ionized air blows the subassembly, and ionized air blows the subassembly and can include air-purifying duct and air ionization device, and air ionization device sets up the air outlet at air-purifying duct, and air-purifying duct's air outlet point is to waiting to detect optical fiber image transmission component and is placed the district.
optionally, in the foregoing apparatus for detecting defects of an optical fiber image-transmitting element, the image capturing assembly includes: the zoom optical microscope lens for imaging, the focal length adjusting module, the path planning module and the driving assembly are arranged on the imaging device;
The focal length adjusting module is used for adjusting the focal length of the continuous variable magnification optical microscope lens for imaging of the image acquisition assembly to be a first focal length so that the continuous variable magnification optical microscope lens for imaging acquires all image information of the second end face of the optical fiber image transmission element to be detected, and is also used for adjusting the focal length of the continuous variable magnification optical microscope lens for imaging of the image acquisition assembly to be a second focal length so as to acquire the image information of the second end face of the optical fiber image transmission element to be detected by amplifying the image;
The image analysis module is also used for determining the circle center coordinate, the diameter or the radius size of the optical fiber image transmitting element to be detected according to all the image information of the second end surface of the optical fiber image transmitting element to be detected;
the path planning module is used for planning a frame-by-frame acquisition path according to the circle center coordinate, the diameter or the radius size of the optical fiber image transmission element to be detected and the multiple of the amplified image for acquiring the image information of the second end surface of the optical fiber image transmission element to be detected;
the driving component is used for driving the image acquisition component and the optical fiber image transmission element to be detected in the optical fiber image transmission element placing area to move relatively, so that the image acquisition component acquires image information of different areas of the second end face of the optical fiber image transmission element to be detected frame by frame.
Optionally, in the foregoing optical fiber image-transmitting element defect detecting apparatus, the light source assembly includes: the device comprises a white parallel light source, diffuse reflection transparent glass and an optical filter;
And the light irradiated by the white parallel light source sequentially passes through the diffuse reflection transparent glass and the optical filter and then irradiates towards the first end face of the optical fiber image transmission element to be detected in the placement area of the optical fiber image transmission element to be detected.
Optionally, in the foregoing optical fiber image-transmitting element defect detecting apparatus, the light source assembly includes: white point light source, diffuse reflection transparent glass and optical filter;
And the light rays irradiated by the white point light source sequentially pass through the diffuse reflection transparent glass and the optical filter and then irradiate towards the first end face of the optical fiber image transferring element to be detected in the optical fiber image transferring element placing area to be detected.
Optionally, the apparatus for detecting defects of an optical fiber image-transmitting element further includes:
and the image display component is electrically connected with the image analysis module and is used for displaying the result of analyzing and judging the shape and the size of the defects in the acquired image information by the image analysis module.
in another aspect, an embodiment of the present invention provides a method for detecting defects in an optical fiber image sensor, including:
irradiating light to the first end face of the optical fiber image transmission element to be detected;
and acquiring image information of the second end face of the optical fiber image transmission element to be detected by an image, and analyzing and judging the shape and size of the defects in the acquired image information.
the object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Optionally, in the method for detecting defects of an optical fiber image transfer element, purified ionized air is blown to the optical fiber image transfer element to be detected.
optionally, in the method for detecting defects of an optical fiber image transmission element, the image acquisition is performed on the image information of the second end face of the optical fiber image transmission element to be detected, and the method specifically includes:
adjusting the focal length of the continuous zoom optical microscope lens for imaging of the image acquisition assembly to be a first focal length, and acquiring all image information of the second end face of the optical fiber image transmission element to be detected by an image;
determining the circle center coordinate, the diameter or the radius size of the optical fiber image transmitting element to be detected according to all image information of the second end face of the optical fiber image transmitting element to be detected;
Adjusting the focal length of the continuous zoom optical microscope lens for imaging of the image acquisition assembly to be a second focal length so as to amplify the image to acquire the image information of the second end face of the optical fiber image transmission element to be detected;
Planning a frame-by-frame acquisition path according to the circle center coordinate, the diameter or the radius size of the optical fiber image transmission element to be detected and the magnification of image information of the second end surface of the optical fiber image transmission element to be detected acquired by amplifying an image;
And acquiring image information of different areas of the second end face of the optical fiber image transmission element to be detected frame by frame according to the frame-by-frame acquisition path.
Optionally, in the method for detecting defects of an optical fiber image-transmitting element, the analyzing and determining the shape and size of the defects in the acquired image information specifically includes:
and analyzing the shape and size of the defects and the coordinates of the defects in the image information acquired frame by frame, and sequentially and correlatively recording the shape and size of the defects and the coordinates of the defects in different areas.
Optionally, in the method for detecting defects of an optical fiber image-transmitting element, the analyzing and determining the shape and size of the defects in the acquired image information specifically includes:
comparing the actual shape and size of the defects with the set shape and size;
If the actual shape size is smaller than the set shape size, judging that the defects are qualified;
and if the actual shape size is larger than the set shape size, determining that the defects are unqualified.
Optionally, in the method for detecting defects of an optical fiber image transfer element, a plurality of optical fiber image transfer elements to be detected are provided;
and sequentially irradiating light rays to the first end face of each optical fiber image transmission element to be detected, acquiring image information of the second end face of each optical fiber image transmission element to be detected through images, and analyzing and judging the shape and size of the defects in the acquired image information.
by the technical scheme, the method and the device for detecting the defects of the optical fiber image transmission element, provided by the technical scheme of the invention, have the advantages that:
According to the method and the device for detecting the defects of the optical fiber image transmission element, provided by the embodiment of the invention, the image information of the second end face of the optical fiber image transmission element to be detected can be acquired through the image of the image acquisition component; the image analysis module acquires the image information acquired by the image acquisition assembly, analyzes and judges the shape and size of the defects in the acquired image information, and judges that the defects are qualified if the actual shape and size of the defects are smaller than the set shape and size; and if the actual shape size of the defects is larger than the set shape size, determining that the defects are unqualified. Compared with the manual naked eye distinguishing mode in the prior art, the distinguishing precision and the detection efficiency can be improved.
the foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic flow chart of a method for detecting defects in an optical fiber image sensor according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a defect detection method for an optical fiber image-transmitting member according to a second embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for detecting defects in an optical fiber image sensor according to three embodiments of the present invention;
FIG. 4 is a schematic flow chart of a method for detecting defects in an optical fiber image sensor according to a fourth embodiment of the present invention;
FIG. 5 is a schematic diagram of an electrical connection configuration of an optical fiber image sensor defect detecting apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a bonding structure of an optical fiber image sensor defect detecting apparatus according to an embodiment of the present invention;
Fig. 7 is a schematic view of a coupling structure of another optical fiber image sensor defect detecting apparatus according to an embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given of the detailed implementation, structure, features and effects of the method and apparatus for detecting defects of an optical fiber image-transmitting member according to the present invention with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Example one
as shown in fig. 1, an embodiment of the present invention provides a method for detecting defects in an optical fiber image sensor, including:
100. irradiating light to the first end face of the optical fiber image transmission element to be detected;
the optical fiber image transmitting element to be detected is provided with two end faces, namely a first end face and a second end face, and light can be transmitted to the second end face of the optical fiber image transmitting element to be detected from the first end face of the optical fiber image transmitting element to be detected;
101. and acquiring image information of the second end face of the optical fiber image transmission element to be detected by an image, and analyzing and judging the shape and size of the defects in the acquired image information.
after the clear image transmitted from the second end surface of the optical fiber image transmission element to be detected irradiates the target surface of the image acquisition assembly, the acquired optical information is converted into an analog electric signal, and the analog electric signal is converted into a digital signal through the A/D converter, so that the digital storage and transfer of the image can be realized. If the optical fiber image transmission element to be detected has defects such as spots, silks and the like, a shadow image is displayed on the second end face of the optical fiber image transmission element to be detected, the shape and the size of the defects can be judged according to the shadow image in the collected image information (the shadow can be confirmed by analyzing the digitally stored image), and further, whether the optical fiber image transmission element to be detected is qualified or not can be judged according to the size of the shape and the size of the defects.
The specific judgment process may include:
comparing the actual shape and size of the defects with the set shape and size;
The actual shape size, the set shape size may include at least one parameter of area, perimeter, length, width, etc.;
If the actual shape size is smaller than the set shape size, judging that the defects are qualified;
and if the actual shape size is larger than the set shape size, determining that the defects are unqualified.
In the comparison, all parameters can be set to be qualified when meeting the comparison condition, or at least 1 parameter can be set to be qualified when meeting the comparison condition, and the comparison can be determined according to the actual condition.
According to the method and the device for detecting the defects of the optical fiber image transmission element, provided by the embodiment of the invention, the image information of the second end face of the optical fiber image transmission element to be detected can be acquired through the image of the image acquisition component; the image analysis module acquires the image information acquired by the image acquisition assembly, analyzes and judges the shape and size of the defects in the acquired image information, and judges that the defects are qualified if the actual shape and size of the defects are smaller than the set shape and size; and if the actual shape size of the defects is larger than the set shape size, determining that the defects are unqualified. Compared with the artificial naked eye distinguishing mode in the prior art, the distinguishing accuracy and the detection efficiency can be improved.
example two
as shown in fig. 2, an embodiment of the present invention provides a method for detecting defects in an optical fiber image sensor, including:
200. Irradiating light to the first end face of the optical fiber image transmission element to be detected;
201. adjusting the focal length of the continuous zoom optical microscope lens for imaging of the image acquisition assembly to be a first focal length, and acquiring all image information of the second end face of the optical fiber image transmission element to be detected by an image;
The first focal length can be a set numerical value, and is determined according to the distance between the image acquisition assembly and the optical fiber image transmission element to be detected and the lens parameters of the image acquisition assembly, so that the requirement of carrying out one-time image acquisition on the whole second end surface of the optical fiber image transmission element to be detected in image acquisition is met.
202. determining the circle center coordinate, the diameter or the radius size of the optical fiber image transmitting element to be detected according to all image information of the second end face of the optical fiber image transmitting element to be detected;
According to the acquired image information of the second end face of the optical fiber image transmission element to be detected, the circle center coordinate, the diameter or the radius size of the second end face (the second end face is in a circular shape) of the optical fiber image transmission element to be detected can be calculated and generated through image processing software.
203. Adjusting the focal length of the continuous zoom optical microscope lens for imaging of the image acquisition assembly to be a second focal length so as to amplify the image to acquire the image information of the second end face of the optical fiber image transmission element to be detected;
The second focal length can be a set value, and is determined according to the distance between the image acquisition assembly and the optical fiber image transmission element to be detected and the lens parameters of the image acquisition assembly, so that the requirement of shooting an image with enough definition can be met, and defects in the image can be distinguished.
204. Planning a frame-by-frame acquisition path according to the circle center coordinate, the diameter or the radius size of the optical fiber image transmission element to be detected and the magnification of image information of the second end surface of the optical fiber image transmission element to be detected acquired by amplifying an image;
the specifically planned frame-by-frame acquisition path can be in various modes, only the images of all areas of the second end face of the optical fiber image transmission element to be detected can be completely acquired, and the edges of all the areas can be overlapped or not overlapped. For example, the planned frame-by-frame acquisition path may be a circular acquisition path from inside to outside, or a circular acquisition path from outside to inside, etc.
205. And acquiring image information of different areas of the second end face of the optical fiber image transmission element to be detected frame by frame according to the frame-by-frame acquisition path.
and in the process of acquiring the image information of different areas, simultaneously recording the coordinate position of the image information and the acquired image picture, and performing associated recording.
206. And analyzing and judging the shape and size of the defects in the acquired image information.
Specifically, the method comprises the following steps: analyzing the shape and size of the defects and the coordinates of the defects in the image information acquired frame by frame, and sequentially and correlatively recording the shape and size of the defects and the coordinates of the defects in different areas.
in actual detection, because the size of the defect in the optical fiber image transmission element to be detected is small, the lens of the image acquisition assembly needs to be amplified, the amplified image cannot contain the whole second end face of the optical fiber image transmission element to be detected at one time, and multiple times of image acquisition are needed respectively.
EXAMPLE III
The method for detecting the defects of the optical fiber image transmission element is suitable for the condition that a plurality of optical fiber image transmission elements to be detected are provided; the method comprises the following steps:
Sequentially irradiating light rays to the first end face of each optical fiber image transmission element to be detected; and acquiring image information of the second end face of each optical fiber image transmission element to be detected by an image, and analyzing and judging the shape and size of the defects in the acquired image information.
the specific process can be realized by moving the light source or moving the optical fiber image transmitting element to be detected. Similarly, the image acquisition assembly can be moved, or the optical fiber image transmission element to be detected can be moved.
In particular, the method for batch detection of the optical fiber image transmission elements provided by the embodiment of the invention can be suitable for batch defect detection. The method can be combined with the method in the second embodiment, and the specific flow process is as follows:
As shown in fig. 3, the following detection steps are sequentially performed on a plurality of optical fiber image transmitting elements to be detected:
irradiating light to the first end face of the optical fiber image transmission element to be detected, adjusting the focal length of the continuous zoom optical microscope lens for imaging of the image acquisition assembly to be a first focal length, and acquiring all image information of the second end face of the optical fiber image transmission element to be detected by an image to realize automatic capture focusing and automatic photographing of the optical fiber image transmission element to be detected;
determining the circle center coordinate, the diameter or the radius size of the optical fiber image transmitting element to be detected according to all image information of the second end face of the optical fiber image transmitting element to be detected; planning a frame-by-frame acquisition path according to the circle center coordinate, the diameter or the radius size of the optical fiber image transmission element to be detected and the magnification of image information of the second end surface of the optical fiber image transmission element to be detected in an amplified image acquisition mode, and realizing the planned frame-by-frame acquisition path of the optical fiber image transmission element to be detected;
Adjusting the focal length of the continuous zoom optical microscope lens for imaging of the image acquisition assembly to be a second focal length so as to amplify the image to acquire the image information of the second end face of the optical fiber image transmission element to be detected; acquiring image information of different areas of the second end face of the optical fiber image transmission element to be detected frame by frame according to the frame-by-frame acquisition path, analyzing the shape size and the coordinates of the defects in the image information acquired frame by frame, and sequentially and correlatively recording the shape size and the coordinates of the defects in the different areas, so that the defect position and the area identification of the optical fiber image transmission element to be detected, the defect area, the equivalent diameter and other parameters are calculated, and the defect parameters and the position coordinates are stored;
Comparing the actual shape and size of the defects with the set shape and size; if the actual shape size is smaller than the set shape size, judging that the defects are qualified; and if the actual shape size is larger than the set shape size, determining that the defects are unqualified.
specifically, after the detection step is completed, a detection report is printed out. The coordinates of the presence of each defect and whether each defect is acceptable may be listed in the inspection report.
example four
as shown in fig. 4, an embodiment of the present invention provides a method for detecting defects in an optical fiber image sensor, including:
400. blowing purified ionized air to an optical fiber image transfer element to be detected;
the ionized air is the ionized air with positive and negative ions, so that particles in the air are prevented from being attached to the surface of the optical fiber image transfer element to be detected due to static electricity, and misdetection can be avoided. In the specific operation, ionized air can be blown towards the second end face of the optical fiber image transmission element to be detected; preferably, the ionized air to be purified is continuously blown to the optical fiber image-transmitting member to be detected. The purified ionized air can be realized by filtering dust in the air and ionizing the filtered air.
401. irradiating light to the first end face of the optical fiber image transmission element to be detected;
402. and acquiring image information of the second end face of the optical fiber image transmission element to be detected by an image, and analyzing and judging the shape and size of the defects in the acquired image information.
And detecting the defects of the optical fiber image transmission element to be detected, wherein the defects refer to the defects of the optical fiber image transmission element to be detected, and if the external environment is not clean, granular impurities can be deposited on the second end face, so that the detection result is definitely misjudged. The ionized air in the embodiment of the invention can prevent particles in the air from being attached to the surface of the optical fiber image transmission element to be detected due to static electricity, thereby improving the accuracy of defect detection.
EXAMPLE five
As shown in fig. 5 and 6, an optical fiber image sensor defect detecting apparatus according to an embodiment of the present invention can detect an optical fiber image sensor defect to be detected by the optical fiber image sensor defect detecting method according to the first to fourth embodiments, and the optical fiber image sensor defect detecting apparatus includes:
the optical fiber image transmitting element placing area 1 is used for placing an optical fiber image transmitting element D10 to be detected;
the light source component 2 irradiates light towards the first end face of the optical fiber image transmitting element D10 to be detected in the optical fiber image transmitting element placing area 1 to be detected;
The image acquisition component 3 is used for acquiring the image information of the second end face of the optical fiber image transmitting element D10 to be detected;
and the image analysis module 4 is electrically connected with the image acquisition assembly 3, acquires the image information acquired by the image acquisition assembly 3, and analyzes and judges the shape and size of the defects in the acquired image information.
According to the method and the device for detecting the defects of the optical fiber image transmission element, provided by the embodiment of the invention, the image information of the second end face of the optical fiber image transmission element to be detected can be acquired through the image of the image acquisition component; the image analysis module acquires the image information acquired by the image acquisition assembly, analyzes and judges the shape and size of the defects in the acquired image information, and judges that the defects are qualified if the actual shape and size of the defects are smaller than the set shape and size; and if the actual shape size of the defects is larger than the set shape size, determining that the defects are unqualified. Compared with the artificial naked eye distinguishing mode in the prior art, the distinguishing accuracy and the detection efficiency can be improved.
the optical fiber image transmitting element placing area to be detected is used for placing the optical fiber image transmitting element to be detected, so that the first end face of the optical fiber image transmitting element to be detected faces the light source assembly, the second end face of the optical fiber image transmitting element to be detected faces the image acquisition assembly, and in the working process of the light source assembly, irradiated light passes through the optical fiber image transmitting element to be detected and then is acquired by the image acquisition assembly.
The placing area of the optical fiber image transmitting element to be detected can be a placing surface or a clamp used for clamping the optical fiber image transmitting element to be detected. Preferably, the clamp is used for suspending the optical fiber image transmission element to be detected above the image acquisition assembly, the clamp adopts an intermediate structure, and a supporting platform for supporting the optical fiber image transmission element to be detected above the image acquisition assembly is arranged in the hollow structure. In practice, the production of optical fiber image transmission elements is mass production, a large number of optical fiber image transmission elements need to be detected, in order to detect the mass optical fiber image transmission elements, a plurality of optical fiber image transmission element placing areas to be detected are arranged on a movable moving platform respectively, and the plurality of optical fiber image transmission element placing areas to be detected can be moved to the positions between the light source assembly and the image acquisition assembly respectively through the movement control of the moving platform. For example, the plurality of optical fiber image transferring element placing areas to be detected are arranged in a linear shape, and when the moving platform moves along the linear direction, the plurality of optical fiber image transferring element placing areas to be detected sequentially move to the position between the light source assembly and the image acquisition assembly. For another example, the plurality of optical fiber image transferring element placing areas to be detected are arranged in a circular ring shape, and when the moving platform rotates in one direction around the center of the circle of the circular ring shape, the plurality of optical fiber image transferring element placing areas to be detected sequentially move to the position between the light source assembly and the image collecting assembly. The movable moving platform can realize accurate movement of X, Y axes on a horizontal plane, and is a platform for batch detection of placed products or tool fixtures. Specifically, the mobile platform comprises a marble platform and a mobile platform. The mobile platform comprises a guide rail, a lead screw, a motor, a grating displacement sensor and the like. The material of the marble platform is granite with flatness of grade 00 or above, so that the detection accuracy and stability are improved. In actual use, marble platforms with different sizes can be selected according to the size of defect detection batches. In order to ensure high precision of test positioning and repeated positioning, the grating displacement sensor adopts a closed type, the measurement step pitch (resolution) is better than 0.5 mu m, and the measurement precision is +/-2 mu m; the lead screw is a ball lead screw, and the precision grade is selected to be above C5 grade; the guide rail selects a screw rod with precision above P level, and the parallelism of the guide rail is not more than 2 mu m when the guide rail travels 300 mm; the motor is a reaction type stepping motor, and the rated torque is selected to be larger than 0.45Nm because the load is not large.
the light source module may adopt an electric light source or a parallel light source, and in one embodiment of the present invention, as shown in fig. 7, the light source module includes: a white point light source 21a, a diffuse reflection transparent glass 22a, and a filter 23 a; the light irradiated by the white point light source 21a sequentially passes through the diffuse reflection transparent glass 22a and the optical filter 23a, and then is irradiated towards the first end face of the optical fiber image transferring element D10 to be detected in the placement area of the optical fiber image transferring element to be detected. Specifically, the point light source can be a halogen bulb, and the power is selected to be not lower than 150W. The filter can select filters of different colors according to the detection requirement, and the green filter is selected in the embodiment of the invention. In another embodiment of the present invention, as shown in fig. 6, the light source assembly 2 includes: a white collimated light source 21b, a diffuse reflection transparent glass 22b, and a filter 23 b; the light irradiated by the white parallel light source 21b sequentially passes through the diffuse reflection transparent glass 22b and the optical filter 23b, and then is irradiated towards the first end face of the optical fiber image transmitting element D10 to be detected in the optical fiber image transmitting element placing area to be detected. Specifically, the white parallel light source is a 3V LED parallel light source, and the LED light source and the diffuse reflection transparent glass are integrated into a whole. The filter can select filters of different colors according to the detection requirement, and the green filter is selected in the embodiment of the invention. Specifically, the white parallel light source is a coaxial lamp, and a piece of semitransparent and semi-reflective glass forming an included angle of 45 degrees with the white parallel light is installed in a shell of the coaxial lamp. The high-brightness and high-density LED array is arranged on the circuit board to form a surface light source, light emitted by the surface light source irradiates on the semi-transparent and semi-reflective glass, the light irradiates on the 45-degree semi-transparent and semi-reflective glass through the injection plate, reflected light irradiates on the first end face of the optical fiber image transmission element to be detected, and defect defects in the optical fiber image transmission element to be detected form images on the second end face and enter the image acquisition assembly. Thus, the reflection of light is eliminated, and the reflection of the image acquisition assembly in the image is avoided. The object presents a sharp image and is captured by the image acquisition assembly for further analysis and processing.
in some embodiments, the image acquisition assembly comprises: the continuous zooming optical microscope lens for imaging is used for adjusting the focal length of the image acquisition assembly to be a first focal length, acquiring all image information of the second end face of the optical fiber image transmission element to be detected by an image, adjusting the focal length of the image acquisition assembly to be a second focal length and acquiring the image information of the second end face of the optical fiber image transmission element to be detected by amplifying the image; specifically, the CCD prepared by the continuous zoom optical microscope lens for imaging is a black and white type 1/2 inch, and the total display magnification is not less than 150 times.
as shown in fig. 5, in order to realize automatic image acquisition and analysis of the optical fiber image-transmitting element to be detected, the image acquisition assembly 3 includes:
The imaging continuous zooming optical microscope lens 31, the focal length adjusting module 32, the path planning module 33 and the driving assembly 34;
The focal length adjusting module is used for adjusting the focal length of the continuous variable magnification optical microscope lens for imaging of the image acquisition assembly to be a first focal length so that the continuous variable magnification optical microscope lens for imaging acquires all image information of the second end face of the optical fiber image transmission element to be detected, and is also used for adjusting the focal length of the continuous variable magnification optical microscope lens for imaging of the image acquisition assembly to be a second focal length so as to acquire the image information of the second end face of the optical fiber image transmission element to be detected by amplifying the image;
The image analysis module 4 is further configured to determine a circle center coordinate, a diameter or a radius size of the optical fiber image transmitting element to be detected according to all image information of the second end face of the optical fiber image transmitting element to be detected;
The path planning module is used for planning a frame-by-frame acquisition path according to the circle center coordinate, the diameter or the radius size of the optical fiber image transmission element to be detected and the multiple of the amplified image for acquiring the image information of the second end surface of the optical fiber image transmission element to be detected;
the driving component is used for driving the image acquisition component and the optical fiber image transmission element to be detected in the optical fiber image transmission element placing area to move relatively, so that the image acquisition component acquires image information of different areas of the second end face of the optical fiber image transmission element to be detected frame by frame. The imaging continuous zoom optical microscope lens is connected with the image analysis module through a serial port communication lead, and each frame of image acquired by the imaging continuous zoom optical microscope lens can be subjected to real-time analog calculation and analysis through the image analysis module to obtain the position coordinates and the size of the defects in each frame of image. The qualification standard and the partition requirement of the defects are set through the running interface of the software, so that the defects can be discriminated, and whether the product defect indexes are qualified or not can be judged.
Specifically, the optical fiber image transfer element defect detection apparatus further includes: and the image display component 5 is electrically connected with the image analysis module and is used for displaying the result of analyzing and judging the shape and size of the defects in the acquired image information by the image analysis module.
EXAMPLE six
as shown in fig. 6, an optical fiber image sensor defect detecting apparatus according to an embodiment of the present invention can detect an optical fiber image sensor defect to be detected by the optical fiber image sensor defect detecting method according to the first to fourth embodiments, and the optical fiber image sensor defect detecting apparatus includes:
an optical fiber image transmission element placing area 1 to be detected;
The air blowing port of the ionized air blowing component 6 faces the optical fiber image transmission element placing area to be detected;
the light source component 2 irradiates light towards the first end face of the optical fiber image transmitting element to be detected in the optical fiber image transmitting element placing area to be detected;
the image acquisition component 3 is used for acquiring the image information of the second end face of the optical fiber image transmission element to be detected;
And the image analysis module 4 is electrically connected with the image acquisition assembly, acquires the image information acquired by the image acquisition assembly, and analyzes and judges the shape and size of the defects in the acquired image information.
In specific implementation, the ionized air blowing assembly can comprise an air purifying pipeline and an air ionizing device, the air ionizing device is arranged at an air outlet of the air purifying pipeline, and the air outlet of the air purifying pipeline points to the placement area of the optical fiber image transfer element to be detected. Preferably, the air outlet of the purified air duct may have a plurality of air outlets (not shown in the figures), which surround the image capturing assembly and are obliquely directed to the placement area of the optical fiber image sensor to be detected. Specifically, the number of the air outlets of the air purification pipeline can be 4. Specifically, the degree of purification of the purified air is required to be not less than 100. The air ionization device can ensure that the end face of the optical fiber image transfer element to be detected is always blown by ionized air in the detection process of the optical fiber image transfer element defect detection device, thereby eliminating the influence of external factors.
The embodiment of the invention has the following beneficial effects:
1) the embodiment of the invention can realize the automatic detection of the defects inside the optical fiber image transmission element, not only can avoid the influence of artificial subjective judgment and improve the reliability and accuracy of the detection result, but also can obviously improve the detection efficiency of the defects and reduce the cost of personnel.
2) the automatic defect detection method and the device for the optical fiber image transmission element are simple in operation of automatic defect detection of the optical fiber image transmission element, do not need more professional knowledge backgrounds, are easy to train, and are more suitable for defect detection of mass production.
3) The embodiment of the invention has good compatibility of the automatic detection instrument for the defects in the optical fiber image transmission element, can realize automatic detection of the defects and can also realize automatic measurement of physical appearance dimensions. And the calculation and analysis software for the instrument has good openness, and can be continuously upgraded to obtain better use effect.
in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It will be appreciated that the relevant features of the devices described above may be referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
in the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed apparatus should not be construed to reflect the intent as follows: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
those skilled in the art will appreciate that the components of the apparatus of the embodiments may be adapted and arranged in one or more arrangements different from the embodiments. The components of the embodiments may be combined into one component and, in addition, they may be divided into a plurality of sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the components of any apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination. The various component embodiments of the present invention may be implemented in hardware, or in a combination thereof.
it should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or components not listed in a claim. The word "a" or "an" preceding a component or element does not exclude the presence of a plurality of such components or elements. The invention may be implemented by means of an apparatus comprising several distinct elements. In the claims enumerating several means, several of these means may be embodied by one and the same item. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (4)
1. An optical fiber image transfer member defect detecting apparatus, comprising:
An optical fiber image transmission element placing area to be detected;
the light source assembly irradiates light towards the first end face of the optical fiber image transmitting element to be detected in the optical fiber image transmitting element placing area to be detected;
The image acquisition component acquires image information of the second end face of the optical fiber image transmission element to be detected;
the image analysis module is electrically connected with the image acquisition assembly, acquires the image information acquired by the image acquisition assembly, analyzes and judges the shape and size of the defects in the acquired image information, and specifically: comparing the actual shape and size of the defects with the set shape and size;
The actual shape size and the set shape size comprise at least one parameter of area, perimeter, length and width;
if the actual shape size is smaller than the set shape size, judging that the defects are qualified;
If the actual shape size is larger than the set shape size, determining that the defects are unqualified;
The image acquisition assembly comprises: the zoom optical microscope lens for imaging, the focal length adjusting module, the path planning module and the driving assembly are arranged on the imaging device;
The focal length adjusting module is used for adjusting the focal length of the continuous variable magnification optical microscope lens for imaging of the image acquisition assembly to be a first focal length so that the continuous variable magnification optical microscope lens for imaging acquires all image information of the second end face of the optical fiber image transmission element to be detected, and is also used for adjusting the focal length of the continuous variable magnification optical microscope lens for imaging of the image acquisition assembly to be a second focal length so as to acquire the image information of the second end face of the optical fiber image transmission element to be detected by amplifying the image;
the image analysis module is also used for determining the circle center coordinate, the diameter or the radius size of the optical fiber image transmitting element to be detected according to all the image information of the second end surface of the optical fiber image transmitting element to be detected;
the path planning module is used for planning a frame-by-frame acquisition path according to the circle center coordinate, the diameter or the radius size of the optical fiber image transmitting element to be detected and the magnification of image information of the second end surface of the optical fiber image transmitting element to be detected in an amplified image acquisition mode so as to completely acquire the image of each area of the second end surface of the optical fiber image transmitting element to be detected;
The driving component is used for driving the image acquisition component and the optical fiber image transmission element to be detected in the optical fiber image transmission element placing area to move relative to each other so that the image acquisition component acquires image information of different areas of the second end face of the optical fiber image transmission element to be detected frame by frame;
the light source assembly includes: the white parallel light source is a coaxial lamp, and a piece of semitransparent and semi-reflecting glass forming an included angle of 45 degrees with the white parallel light is installed in a shell of the coaxial lamp.
2. An optical fiber image transfer member defect detection apparatus according to claim 1, further comprising:
ionized air blows the subassembly, and ionized air blows the subassembly and can include air-purifying duct and air ionization device, and air ionization device sets up the air outlet at air-purifying duct, and air-purifying duct's air outlet point is to waiting to detect optical fiber image transmission component and is placed the district.
3. The optical fiber image transfer member defect detecting apparatus according to claim 1,
The light source assembly includes: diffuse reflection transparent glass and an optical filter;
And the light irradiated by the white parallel light source sequentially passes through the diffuse reflection transparent glass and the optical filter and then irradiates towards the first end face of the optical fiber image transmission element to be detected in the placement area of the optical fiber image transmission element to be detected.
4. an optical fiber image transfer member defect detection apparatus according to claim 1, further comprising:
And the image display component is electrically connected with the image analysis module and is used for displaying the result of analyzing and judging the shape and the size of the defects in the acquired image information by the image analysis module.
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| CN110376203A (en) * | 2019-06-26 | 2019-10-25 | 阳程科技股份有限公司 | Glass fiber detects board and its detection method |
| CN111739021B (en) * | 2020-08-05 | 2020-12-08 | 武汉精立电子技术有限公司 | Method and device for detecting foreign matters inside and outside display panel glass |
| CN114383810B (en) * | 2022-01-10 | 2023-09-12 | 中国建筑材料科学研究总院有限公司 | Device and method for pre-judging and discriminating leakage points of optical fiber image transmission element or material |
| CN115353283B (en) * | 2022-09-09 | 2023-08-15 | 中国建筑材料科学研究总院有限公司 | Optical fiber image transmission element, preparation method and application thereof |
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| CN102661722B (en) * | 2012-05-16 | 2014-06-04 | 浙江大学 | Image overlaying-based thin sheet part contour automatic detection head and method |
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