CN115839826B - Detection device and detection method for optical fiber transmittance and numerical aperture - Google Patents
Detection device and detection method for optical fiber transmittance and numerical aperture Download PDFInfo
- Publication number
- CN115839826B CN115839826B CN202211371833.XA CN202211371833A CN115839826B CN 115839826 B CN115839826 B CN 115839826B CN 202211371833 A CN202211371833 A CN 202211371833A CN 115839826 B CN115839826 B CN 115839826B
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- lens group
- fixing frame
- light source
- imaging camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 153
- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000002834 transmittance Methods 0.000 title claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 61
- 238000003384 imaging method Methods 0.000 claims abstract description 44
- 230000003287 optical effect Effects 0.000 claims abstract description 26
- 238000007493 shaping process Methods 0.000 claims abstract description 10
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000000835 fiber Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- -1 i.e. Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
Abstract
The invention discloses a detection device and a detection method for the transmittance and the numerical aperture of an optical fiber, wherein the detection device comprises a laser light source, a first optical fiber fixing frame, a first lens group, a second optical fiber fixing frame, a second lens group, an optical power meter and an imaging camera, wherein the laser light source outputs a test light beam through an emergent optical fiber; the first optical fiber fixing frame is used for fixing the output end of the emergent optical fiber; the distance between the first lens group and the first optical fiber fixing frame is adjustable, and the first lens group is used for shaping the test light beam output by the emergent optical fiber; the second optical fiber fixing frame is used for fixing the optical fiber to be tested; the second lens group is used for shaping the test light beam output by the optical fiber to be tested; the optical power meter is used for obtaining the transmittance of the test light beam passing through the optical fiber to be tested; the imaging camera is used for testing the appearance data of the light spots. The transmittance and the numerical aperture of the product can be tested simultaneously by adjusting the distance between the first lens group and the first optical fiber fixing frame.
Description
Technical Field
The invention relates to the technical field of performance detection of optical devices, in particular to a detection device and a detection method for optical fiber transmittance and numerical aperture.
Background
With the rapid development of optical communication technology, the use of optical fibers, i.e., optical fibers, has become very popular. In optics, the numerical aperture of an optical fiber describes the magnitude of the cone angle of light entering and exiting the fiber, indicating the ability of the fiber to receive incident light. In an optical fiber communication system, there is a certain requirement for the numerical aperture of an optical fiber, and in order to inject light into the optical fiber most effectively, a lens having the same numerical aperture as that of the optical fiber should be used for light collection. Transmittance is a direct indication of the amount of light transmitted by the optical device. Therefore, accurately measuring the numerical aperture and transmittance is significant for measuring the quality of optical fiber products. In the existing products, the test system cannot simultaneously complete the test of the numerical aperture and the transmittance of the optical fiber products, and the problems of low test repeatability, complex debugging, easy crashing of materials and the like exist.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present invention provides a detection device and a detection method for optical fiber transmittance and numerical aperture, and the adopted technical scheme is as follows:
the invention provides a detection device for the transmittance and the numerical aperture of an optical fiber, which comprises a laser light source, a first optical fiber fixing frame, a first lens group, a second optical fiber fixing frame, a second lens group, an optical power meter and an imaging camera, wherein the laser light source outputs a test light beam through an emergent optical fiber; the first optical fiber fixing frame is used for fixing the output end of the emergent optical fiber; the distance between the first lens group and the first optical fiber fixing frame is adjustable, and the first lens group is used for shaping the test light beam output by the emergent optical fiber; the second optical fiber fixing frame is used for fixing the optical fiber to be tested; the second lens group is used for shaping the test light beam output by the optical fiber to be tested; the optical power meter is used for obtaining the transmittance of the test light beam passing through the optical fiber to be tested; the imaging camera is used for testing the appearance data of the light spots.
In some embodiments of the present invention, the first lens group includes two convex lenses, the convex surfaces of the two convex lenses are disposed opposite to each other, and the distance between the output end of the outgoing optical fiber and the first lens group is adjusted to adjust the numerical aperture of the light source where the light source is incident to the optical fiber to be measured.
In some embodiments of the present invention, the second lens group includes an objective lens, a condenser lens group, and a beam splitter prism, where the objective lens is disposed behind the second optical fiber fixing frame, and the objective lens shapes the light beam output by the optical fiber to be tested into a parallel light beam; the condensing lens group is arranged behind the objective lens, and focuses and images the parallel light beams to the imaging camera; the beam splitting prism is arranged between the objective lens and the collecting lens group, the beam splitting prism divides the test beam into a first beam and a second beam, the first beam is output to the optical power meter, and the second beam is output to the imaging camera through the collecting lens group.
In some embodiments of the present invention, the testing device includes a first moving platform, a second moving platform, and a third moving platform, where the laser light source, the first optical fiber fixing frame, and the first lens group are installed on the first moving platform, the second optical fiber fixing frame is installed on the second moving platform, the second lens group, the optical power meter, and the imaging camera are installed on the third moving platform, and the first moving platform and the second moving platform are both five-axis adjustable platforms, and a distance between the third moving platform and the second moving platform is adjustable.
In some embodiments of the present invention, the detection device includes a fixed platform, where the first moving platform, the second moving platform, and the third moving platform are mounted on the fixed platform, and the fixed platform is mounted with a rubber damping vibration isolator and a horizontal bearing adjusting mechanism, where the horizontal bearing adjusting mechanism is used to adjust the level of the fixed platform to ensure the accuracy of the test result, and the rubber damping vibration isolator is used to enhance the shock resistance of the fixed platform.
In some embodiments of the present invention, the detection device includes a control system, where the control system includes an axis adjustment feedback unit, and the axis adjustment feedback unit is electrically connected to the first moving platform, the second moving platform, and the third moving platform, respectively.
In some embodiments of the present invention, the control system includes an image acquisition computing unit, the image acquisition computing unit is electrically connected to the imaging camera, and the axis adjustment feedback unit is electrically connected to the image acquisition computing unit.
In some embodiments of the present invention, the control system is electrically connected to the laser light source, which may be a narrow-band laser light source or a wide-band laser light source.
The invention also provides a detection method for the transmittance and the numerical aperture of the optical fiber, which is implemented based on the detection device, and comprises the following steps:
adjusting the position and angle of a laser light source according to the light spot of the imaging camera, so that the laser light source and the imaging camera are positioned on the same optical axis;
placing the optical fiber to be measured into a second optical fiber fixing frame, and adjusting the second optical fiber fixing frame to enable a laser light source, the optical fiber to be measured and an imaging camera to be positioned on the same optical axis;
and adjusting the distance between the first lens group and the first optical fiber fixing frame to enable the test light beam to enter the optical fiber to be tested in different numerical apertures, and calculating the numerical aperture of the optical fiber to be tested through the light spot obtained by the imaging camera.
In some embodiments of the present invention, when the second optical fiber fixing frame is adjusted, the front end face and the rear end face of the optical fiber to be tested are respectively imaged, the position coordinates of the centroid of the light spot are recorded, and when the position coordinates of the centroid of the light spot are consistent twice, the coaxial debugging of the laser light source, the optical fiber to be tested and the imaging camera is completed.
The embodiment of the invention has at least the following beneficial effects: the detection device is provided with the first lens group between the emergent optical fiber and the optical fiber to be detected, so that the occurrence of material collision is avoided, the distance between the first lens group and the emergent optical fiber is adjusted, the test light beam enters the optical fiber to be detected at different incident cone angles, and the numerical aperture of the optical fiber to be detected can be calculated by means of the light spot morphology data output by the optical fiber to be detected by the imaging camera while the transmittance is tested.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a detection device for the transmittance and numerical aperture of an optical fiber image transmission element.
Reference numerals: 110. a laser light source; 120. a first optical fiber fixing frame; 121. an exit optical fiber; 201. a first convex lens; 202. a second convex lens; 300. the second optical fiber fixing frame; 410. an objective lens; 420. a beam-splitting prism; 430. a condensing lens group; 510. an optical power meter; 520. an imaging camera; 610. a first mobile platform; 620. a second mobile platform; 630. a third mobile platform; 700. a control system; 800. and fixing the platform.
Detailed Description
Embodiments of the present invention are described in detail below in conjunction with fig. 1, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that, if the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used as directions or positional relationships based on the directions shown in the drawings, the directions are merely for convenience of description and for simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Features defining "first", "second" are used to distinguish feature names from special meanings, and furthermore, features defining "first", "second" may explicitly or implicitly include one or more such features. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
With the rapid development of optical communication technology, the use of optical fibers, i.e., optical fibers, has become very popular. In optics, the numerical aperture of an optical fiber describes the magnitude of the cone angle of light entering and exiting the fiber, indicating the ability of the fiber to receive incident light. In an optical fiber communication system, there is a certain requirement for the numerical aperture of an optical fiber, and in order to inject light into the optical fiber most effectively, a lens having the same numerical aperture as that of the optical fiber should be used for light collection. Transmittance is a direct indication of the amount of light transmitted by the optical device. Therefore, accurately measuring the numerical aperture and transmittance is significant for measuring the quality of optical fiber products. In the existing products, the test system cannot simultaneously complete the test of the numerical aperture and the transmittance of the optical fiber products, and the problems of low test repeatability, complex debugging, easy crashing of materials and the like exist.
The invention relates to a detection device for optical fiber transmittance and numerical aperture, which comprises a laser light source 110, a first optical fiber fixing frame 120, a first lens group, a second optical fiber fixing frame 300, a second lens group, an optical power meter 510 and an imaging camera 520, wherein the laser light source 110 outputs a test light beam through an emergent optical fiber 121; the first optical fiber fixing frame 120 is used for fixing the output end of the emergent optical fiber 121; the distance between the first lens group and the first optical fiber fixing frame 120 is adjustable, and the first lens group is used for shaping the test light beam output by the emergent optical fiber 121; the second optical fiber fixing frame 300 is used for fixing the optical fiber to be tested; the second lens group is used for shaping the test light beam output by the optical fiber to be tested; the optical power meter 510 is used for obtaining the transmittance of the test beam passing through the optical fiber to be tested; the imaging camera 520 is used to test the spot profile data. The detection device sets up the condition that the material is avoided bumping between exit optical fiber 121 and the optic fibre that awaits measuring and takes place for the first lens group, through adjusting the distance between first lens group and the exit optical fiber 121, makes the test beam get into the optic fibre that awaits measuring with different incident cone angles, can calculate the numerical aperture of optic fibre that awaits measuring with the help of the facula topography data of imaging camera 520 test output of optic fibre that awaits measuring when the test transmissivity.
It can be understood that by adjusting the distance between the first optical fiber fixing frame 120 and the first lens group, the test beam can be made to enter the first lens group at different cone angles, and then the cone angle of the beam exiting the first lens group is changed by twice refraction of the first lens group, so that the beam shaping is realized by changing the divergence degree of the beam, and the beam is made to enter the optical fiber to be tested at different numerical apertures.
Further, the second lens group includes an objective lens 410, a condenser lens group 430, and a beam splitter prism 420, where the objective lens 410 is disposed behind the second optical fiber holder 300, and the objective lens 410 shapes the light beam output by the optical fiber to be measured into a parallel light beam; the condenser lens group 430 is disposed behind the objective lens 410, and the condenser lens group 430 focuses and images the parallel light beams to the imaging camera 520; the beam splitter prism 420 is disposed between the objective lens 410 and the condenser lens group 430, and the beam splitter prism 420 splits the test beam into a first beam and a second beam, the first beam is output to the optical power meter 510, and the second beam is output to the imaging camera 520 via the condenser lens group 430. It can be understood that, in the second lens group, the objective lens 410 with different multiplying power can be selected according to the requirement of the light spot of the product, the collecting lens group 430 and the objective lens 410 with different multiplying power are combined to form an image with a specified multiplying power, and the light spot is output to the appearance data of the test light spot at the imaging camera 520, so as to be suitable for testing the optical fiber product with multiple specifications. In this embodiment, the first light beam and the second light beam are perpendicular to each other.
Further, the testing device includes a first moving platform 610, a second moving platform 620, and a third moving platform 630, the laser light source 110, the first optical fiber fixing frame 120, and the first lens group are installed on the first moving platform 610, the second optical fiber fixing frame 300 is installed on the second moving platform 620, the second lens group, the optical power meter 510, and the imaging camera 520 are installed on the third moving platform 630, and a distance between the third moving platform 630 and the second moving platform 620 is adjustable. It will be appreciated that the distance between the first moving platform 610 and the second moving platform 620 is adjusted so that the test beam enters the optical fiber under test with different numerical apertures, and the distance between the second moving platform 620 and the third moving platform 630 is adjusted so that the test beam exiting the optical fiber under test is adjusted to different positions for spot testing.
Specifically, in the embodiment, the first moving platform 610 and the second moving platform 620 are both five-axis adjustable platforms, so that the laser light source 110, the first lens group, the optical fiber to be tested, and other elements can adjust the angles while adjusting the positions, thereby completing coaxial debugging or other product testing and meeting the requirements of different application scenes.
It can be appreciated that the detection device includes a control system 700, and the control system 700 includes an axis adjustment feedback unit electrically connected to the first moving platform 610, the second moving platform 620, and the third moving platform 630, respectively. Specifically, the axis adjustment feedback unit includes a PLC and three servomotors corresponding to the first moving platform 610, the second moving platform 620, and the third moving platform 630, and the PLC sends corresponding instructions to the designated servomotors to drive the corresponding moving platforms to move, so as to complete the position adjustment.
Further, the control system 700 includes an image acquisition and calculation unit electrically connected to the imaging camera 520, and an axis adjustment feedback unit electrically connected to the image acquisition and calculation unit. It will be appreciated that the image acquisition computation unit is configured to analyze the spot profile data obtained from the imaging camera 520 test. Specifically, in this embodiment, the image acquisition and calculation unit processes the light spot picture through a visual algorithm to obtain a product coordinate, and according to the difference value of the centroid coordinates of the light spot formed by the front end face imaging and the rear end face of the optical fiber to be tested, the coordinate deviation is fed back to the PLC for processing, and then the PLC sends an instruction to drive the motor to move to the corresponding position to complete the test.
Further, the control system 700 is electrically connected to the laser light source 110, and the laser light source 110 can adjust the narrowband laser light source or the broadband laser light source. The present application may adjust the laser light source 110 by the control system 700 to meet various testing requirements relative to a single input light source as in the prior art.
Further, the first lens group includes two convex lenses, the convex surfaces of the two convex lenses are opposite, and the distance from the output end of the emergent optical fiber 121 to the first lens group is adjusted to adjust the numerical aperture of the light source incident to the optical fiber to be measured. In this embodiment, the first convex lens 201 and the second convex lens 202 are configured as single-sided convex lenses, and it can be understood that the distance between the emergent optical fiber 121 and the first lens group is adjusted, the test beam is incident on the first convex lens 201 at different incident angles, the test beam is shaped, the divergence angle of the test beam is changed, and then the test beam is incident on the second convex lens 202 for focusing, so as to finally achieve the purpose of adjusting the numerical aperture of the test beam incident on the optical fiber to be tested. In other embodiments, the first lens group may also add a cylindrical mirror or other lens to further shape the test beam exiting at the exit fiber, taking into account the different beam shaping requirements.
Further, the testing device includes a fixed platform 800, and the first mobile platform 610, the second mobile platform 620, and the third mobile platform 630 are mounted on the fixed platform 800. Specifically, the fixed platform 800 is mounted with a rubber damping vibration isolator for enhancing the shock resistance of the fixed platform 800.
Further, the stationary platform 800 is mounted with a horizontal bearing adjustment mechanism, it being understood that the horizontal bearing adjustment mechanism is used to adjust the level of the stationary platform 800 to ensure the accuracy of the test results. The fixed platform 800 with the horizontal bearing adjustment mechanism belongs to an optical platform device commonly known in the art, and is not described herein.
In some embodiments, the detection device comprises a black box, it being understood that the black box is used to avoid the influence of ambient light sources on the detection device. Specifically, the black box can be covered with a fixed platform 800 to protect the whole detection device from the influence of an ambient light source; the black box may also cover the portions of the laser light source 110 to the second optical fiber fixing frame 300, i.e., the portions of the first moving platform 610 and the second moving platform 620.
The invention also relates to a detection method for the transmittance and the numerical aperture of the optical fiber, which is implemented based on the detection device, and comprises the following steps:
the position and angle of the laser light source 110 are adjusted according to the light spot of the imaging camera 520, so that the laser light source 110 and the imaging camera 520 are positioned on the same optical axis;
placing the optical fiber to be measured into a second optical fiber fixing frame 300, and adjusting the second optical fiber fixing frame 300 to enable the laser light source 110, the optical fiber to be measured and the imaging camera 520 to be positioned on the same optical axis;
the distance between the first lens group and the first optical fiber fixing frame 120 is adjusted, so that the test light beams are incident on the optical fiber to be tested with different numerical apertures, and the numerical aperture of the optical fiber to be tested is calculated through the light spots obtained by the imaging camera 520.
Specifically, taking the light spot a and the light spot b obtained by the imaging camera 520 when the first lens group is at different positions as an example, the method for calculating the numerical aperture through the light spot formed by the optical fiber to be measured includes:
let the centroid abscissa of spot a be X a mm, diameter of spot a is D a mm, centroid abscissa of spot b is X b mm, diameter of spot b is D b In mm, the numerical aperture of the optical fiber to be measured was calculated as na=sin (atan ((D) b -D a )/2)/(X b -X a ))。
Further, when the second optical fiber fixing frame 300 is adjusted, the front end face and the rear end face of the optical fiber to be tested are respectively imaged, the position coordinates of the center of mass of the facula are recorded, and when the position coordinates of the center of mass of the facula are consistent, the coaxial debugging of the laser light source 110, the optical fiber to be tested and the imaging camera 520 is completed.
Specifically, taking a coaxial debugging process as an example, taking the centroid of a light spot imaged by the front end face of the optical fiber to be detected as the center of field of view, wherein the centroid of a light spot imaged by the rear end face of the optical fiber to be detected has X-axis direction deviation A 1 Y-axis direction deviation B 1 The axis adjustment feedback unit drives the second moving platform 620 to move the centroid of the light spot along the X-axis center direction by an amount a 2 Is A 1 And/2, repeatedly adjusting to the point that the center of mass of the light spot coincides with the center of the field of view, and driving the second moving platform 620 to move the center of mass of the light spot along the Y-axis center direction by an amount B 2 Is B 1 /2. And repeatedly adjusting until the centroid of the light spot coincides with the center of the visual field, and thus completing coaxial debugging.
In the description of the present specification, if a description appears that makes reference to the term "one embodiment," "some examples," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples," etc., it is intended that the particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (5)
1. A device for detecting the transmittance and numerical aperture of an optical fiber, comprising:
a laser light source (110), the laser light source (110) outputting a test beam through an exit optical fiber (121);
a first optical fiber fixing frame (120), wherein the first optical fiber fixing frame (120) is used for fixing the output end of the emergent optical fiber (121);
a first lens group, the distance between the first lens group and the first optical fiber fixing frame (120) is adjustable, and the first lens group is used for shaping the test light beam output by the emergent optical fiber (121);
the second optical fiber fixing frame (300), the said second optical fiber fixing frame (300) is used for fixing the optical fiber to be measured;
the second lens group is used for shaping the test light beam output by the optical fiber to be tested;
the optical power meter (510) is used for acquiring the transmittance of the test light beam passing through the optical fiber to be tested;
an imaging camera (520), the imaging camera (520) for testing spot profile data;
wherein the second lens group includes:
an objective lens (410), wherein the objective lens (410) is arranged behind the second optical fiber fixing frame (300), and the objective lens (410) shapes the light beam output by the optical fiber to be tested into a parallel light beam;
a condenser lens group (430), the condenser lens group (430) being disposed behind the objective lens (410), the condenser lens group (430) focusing and imaging a parallel light beam and outputting the parallel light beam to the imaging camera (520);
a beam splitting prism (420), the beam splitting prism (420) being disposed between the objective lens (410) and the condenser lens group (430), the beam splitting prism (420) splitting a test beam into a first beam and a second beam, the first beam being output to the optical power meter (510), the second beam being output to the imaging camera (520) via the condenser lens group (430); wherein the first beam and the second beam are perpendicular to each other;
the testing device comprises a first mobile platform (610), a second mobile platform (620) and a third mobile platform (630), wherein the laser light source (110), the first optical fiber fixing frame (120) and the first lens group are arranged on the first mobile platform (610), the second optical fiber fixing frame (300) is arranged on the second mobile platform (620), the second lens group, the optical power meter (510) and the imaging camera (520) are arranged on the third mobile platform (630), the first mobile platform (610) and the second mobile platform (620) are all five-axis adjustable platforms, and the distance between the third mobile platform (630) and the second mobile platform (620) is adjustable;
the detection device comprises a control system (700), wherein the control system (700) comprises an axis adjustment feedback unit, and the axis adjustment feedback unit is respectively and electrically connected with the first mobile platform (610), the second mobile platform (620) and the third mobile platform (630);
the control system (700) comprises an image acquisition and calculation unit, wherein the image acquisition and calculation unit is electrically connected with the imaging camera (520), and the shaft adjustment feedback unit is electrically connected with the image acquisition and calculation unit; the image acquisition and calculation unit is used for processing the light spot morphology data obtained by the imaging camera 520 through a visual algorithm to obtain a light spot centroid coordinate difference value between the light spot centroid coordinate imaged by the front end face of the optical fiber to be detected and the light spot centroid coordinate imaged by the rear end face of the optical fiber to be detected, and feeding back the light spot centroid coordinate difference value to the axis adjustment feedback unit so as to enable the axis adjustment feedback unit to perform position adjustment;
the control system (700) is electrically connected with the laser light source (110), and the laser light source (110) can adjust a narrow-band laser light source or a broadband laser light source.
2. The device for detecting the transmittance and numerical aperture of an optical fiber according to claim 1, wherein: the first lens group comprises two convex lenses, the convex surfaces of the two convex lenses are arranged in opposite directions, and the distance from the output end of the emergent optical fiber (121) to the first lens group is adjusted to adjust the numerical aperture of the light source incident to the optical fiber to be measured.
3. The device for detecting the transmittance and numerical aperture of an optical fiber according to claim 1, wherein: the detection device comprises a fixed platform (800), wherein the first mobile platform (610), the second mobile platform (620) and the third mobile platform (630) are installed on the fixed platform (800), the fixed platform (800) is provided with a rubber damping vibration isolator and a horizontal bearing adjusting mechanism, the horizontal bearing adjusting mechanism is used for adjusting the level of the fixed platform (800) so as to ensure the precision of a test result, and the rubber damping vibration isolator is used for enhancing the shock resistance of the fixed platform (800).
4. A method for detecting the transmittance and numerical aperture of an optical fiber, based on the detection device according to any one of claims 1 to 3, characterized in that:
adjusting the position and angle of a laser light source according to the light spot of the imaging camera, so that the laser light source and the imaging camera are positioned on the same optical axis;
placing the optical fiber to be measured into a second optical fiber fixing frame, and adjusting the second optical fiber fixing frame to enable a laser light source, the optical fiber to be measured and an imaging camera to be positioned on the same optical axis;
and adjusting the distance between the first lens group and the first optical fiber fixing frame to enable the test light beam to enter the optical fiber to be tested in different numerical apertures, and calculating the numerical aperture of the optical fiber to be tested through the light spot obtained by the imaging camera.
5. The method for detecting the transmittance and the numerical aperture of an optical fiber according to claim 4, wherein: when the second optical fiber fixing frame is adjusted, the front end face and the rear end face of the optical fiber to be detected are respectively imaged, the position coordinates of the centroid of the facula are recorded, and when the position coordinates of the centroid of the facula are consistent twice, the coaxial debugging of the laser light source, the optical fiber to be detected and the imaging camera is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211371833.XA CN115839826B (en) | 2022-11-03 | 2022-11-03 | Detection device and detection method for optical fiber transmittance and numerical aperture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211371833.XA CN115839826B (en) | 2022-11-03 | 2022-11-03 | Detection device and detection method for optical fiber transmittance and numerical aperture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115839826A CN115839826A (en) | 2023-03-24 |
| CN115839826B true CN115839826B (en) | 2024-02-13 |
Family
ID=85576827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211371833.XA Active CN115839826B (en) | 2022-11-03 | 2022-11-03 | Detection device and detection method for optical fiber transmittance and numerical aperture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115839826B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4220411A (en) * | 1978-08-14 | 1980-09-02 | The United States Of America As Represented By The Secretary Of The Navy | Fiber optic light launching assembly |
| TW503310B (en) * | 2000-05-26 | 2002-09-21 | Zyoptics Inc | Method and apparatus for wavefront sensing |
| JP2004309896A (en) * | 2003-04-09 | 2004-11-04 | Koshin Kogaku Kogyo Kk | Collimator lens for optical fiber, and optical coupler |
| CN1696764A (en) * | 2005-03-30 | 2005-11-16 | 中国科学院长春光学精密机械与物理研究所 | Light beam shaping device in use for semiconductor laser array in high power |
| CN101477317A (en) * | 2009-02-10 | 2009-07-08 | 上海微电子装备有限公司 | Illumination optical system used for micro-photoetching |
| CN203761396U (en) * | 2014-01-16 | 2014-08-06 | 中国科学院等离子体物理研究所 | Portable optical fiber transmittance test system |
| CN104391356A (en) * | 2014-11-15 | 2015-03-04 | 北京理工大学 | Grazing diffraction grating-based high-power optical isolation method |
| CN106053026A (en) * | 2016-07-06 | 2016-10-26 | 中国科学院西安光学精密机械研究所 | Optical efficiency testing device and optical efficiency testing method for infrared fiber image-transmitting bundle |
| CN112903249A (en) * | 2021-03-02 | 2021-06-04 | 武汉睿芯特种光纤有限责任公司 | Cladding numerical aperture measuring device of double-cladding optical fiber |
| CN113376857A (en) * | 2021-06-08 | 2021-09-10 | 福州市纳飞光电科技有限公司 | High-precision optical light path debugging device and debugging method thereof |
-
2022
- 2022-11-03 CN CN202211371833.XA patent/CN115839826B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4220411A (en) * | 1978-08-14 | 1980-09-02 | The United States Of America As Represented By The Secretary Of The Navy | Fiber optic light launching assembly |
| TW503310B (en) * | 2000-05-26 | 2002-09-21 | Zyoptics Inc | Method and apparatus for wavefront sensing |
| JP2004309896A (en) * | 2003-04-09 | 2004-11-04 | Koshin Kogaku Kogyo Kk | Collimator lens for optical fiber, and optical coupler |
| CN1696764A (en) * | 2005-03-30 | 2005-11-16 | 中国科学院长春光学精密机械与物理研究所 | Light beam shaping device in use for semiconductor laser array in high power |
| CN101477317A (en) * | 2009-02-10 | 2009-07-08 | 上海微电子装备有限公司 | Illumination optical system used for micro-photoetching |
| CN203761396U (en) * | 2014-01-16 | 2014-08-06 | 中国科学院等离子体物理研究所 | Portable optical fiber transmittance test system |
| CN104391356A (en) * | 2014-11-15 | 2015-03-04 | 北京理工大学 | Grazing diffraction grating-based high-power optical isolation method |
| CN106053026A (en) * | 2016-07-06 | 2016-10-26 | 中国科学院西安光学精密机械研究所 | Optical efficiency testing device and optical efficiency testing method for infrared fiber image-transmitting bundle |
| CN112903249A (en) * | 2021-03-02 | 2021-06-04 | 武汉睿芯特种光纤有限责任公司 | Cladding numerical aperture measuring device of double-cladding optical fiber |
| CN113376857A (en) * | 2021-06-08 | 2021-09-10 | 福州市纳飞光电科技有限公司 | High-precision optical light path debugging device and debugging method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 激光的光纤传输特性研究;顾绍庭 等;激光技术(06);376-379 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115839826A (en) | 2023-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10245683B2 (en) | Apparatus and method for beam diagnosis on laser processing optics | |
| US3877788A (en) | Method and apparatus for testing lenses | |
| CN104568389A (en) | Bilateral dislocation differential confocal element parameter measuring method | |
| CN109556531B (en) | Accurate calibration system and method for point diffraction interferometer light path based on image information | |
| JP2006133241A (en) | Absolute measuring method and implementing device of geometrical or optical structure of optical element | |
| KR20050052385A (en) | Eccentricity measuring method and eccentricity measuring apparatus | |
| CN102589428B (en) | Asymmetric-incidence-based sample axial position tracking and correcting method and device | |
| CN106767545A (en) | A kind of high accuracy high-space resolution angel measuring instrument and angle measurement method | |
| CN109187430B (en) | Refractive index measuring method and device for rear-mounted pupil laser differential confocal lens | |
| JPH0363009B2 (en) | ||
| CN112747904B (en) | Method for assembling and adjusting infrared transfer function measuring instrument | |
| US3528748A (en) | Alignment of adjustable parts of a structure | |
| CN109186479B (en) | Method and device for measuring axial clearance of rear-mounted pupil laser differential confocal lens group | |
| JP2002071513A (en) | Interferometer for immersion microscope objective and evaluation method of the immersion microscope objective | |
| CN111220088B (en) | Measurement system and method | |
| CN111006854A (en) | Device and method for testing diffraction efficiency of micro-nano structure lens | |
| JPH10311779A (en) | Equipment for measuring characteristics of lens | |
| CN115839826B (en) | Detection device and detection method for optical fiber transmittance and numerical aperture | |
| JP2005337978A (en) | Display method for eccentricity measured result | |
| CN107688022A (en) | A kind of optical element surface defect detecting device | |
| US6924897B2 (en) | Point source module and methods of aligning and using the same | |
| WO2023098349A1 (en) | Optical lens parameter measurement device and method | |
| CN206193312U (en) | Micron order photoelectricity centring means based on surface reflection like | |
| CN206990194U (en) | A kind of optical system wavefront aberration measurement apparatus based on Shack-Hartmann wavefront sensor | |
| US20140320672A1 (en) | Method and Apparatus for Measuring Flange Back Focus and Calibrating Track Length Scales of Photographic Objective Lenses |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |