CN219777046U - Optical waveguide testing device - Google Patents
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- CN219777046U CN219777046U CN202320950624.4U CN202320950624U CN219777046U CN 219777046 U CN219777046 U CN 219777046U CN 202320950624 U CN202320950624 U CN 202320950624U CN 219777046 U CN219777046 U CN 219777046U
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Abstract
The utility model relates to an optical waveguide testing device which can comprehensively evaluate the optical performance of an optical waveguide without damaging the optical waveguide. The optical waveguide testing device comprises a testing platform, a projection component, an angle adjusting component, a first testing component and a second testing component, wherein the projection component is fixedly arranged on the testing platform to correspond to an incident testing position, the angle adjusting component is positioned in an optical path between the projection component and the incident testing position, the first testing component is arranged on the testing platform to correspond to the incident testing position, and the second testing component is arranged on the testing platform to correspond to an emergent testing position. The angle adjusting component is a wedge-shaped prism group which is rotatably arranged on the test platform. The first testing component and the angle adjusting component are respectively positioned at two opposite sides of the incident testing position and are used for collecting the incident light when the optical waveguide to be tested is not placed so as to measure the coupling-in luminous flux and the coupling-in chromaticity. The second testing component is used for collecting outgoing light coupled out through the optical waveguide to be tested when the optical waveguide to be tested is placed, so as to measure the coupling-out luminous flux and the coupling-out chromaticity.
Description
Technical Field
The utility model relates to the technical field of light efficiency testing, in particular to an optical waveguide testing device.
Background
Light transmission efficiency and chromaticity are important indicators for measuring the optical performance of an optical waveguide. With the increase of optical waveguides coupled in or out at different angles, accurate measurement of optical transmission efficiency and chromaticity of optical waveguides coupled in or out at different angles has become an important study subject.
However, the existing test system generally only can test the light efficiency of the optical waveguide at the normal incidence angle, and it is difficult to truly and accurately evaluate the optical performance of the optical waveguide. In order to test the light efficiency of the optical waveguide under the oblique incidence angle, the optical waveguide has to be rotated to adjust the angle, but the product is easily damaged in the process of adjusting the angle of the optical waveguide, and the test requirement of production cannot be met.
Disclosure of Invention
One advantage of the present utility model is to provide an optical waveguide testing device that can measure the luminous flux and chromaticity of an optical waveguide at different angles of incidence without rotating the optical waveguide, so as to facilitate comprehensive evaluation of the optical performance of the optical waveguide while not damaging the optical waveguide.
Another advantage of the present utility model is to provide an optical waveguide testing device, wherein in an embodiment of the present utility model, the optical waveguide testing device is compatible with light efficiency testing of monochromatic waveguides and folded waveguides, so as to expand the application range thereof.
Another advantage of the present utility model is to provide an optical waveguide testing apparatus, wherein in one embodiment of the present utility model, the optical waveguide testing apparatus is capable of simulating incident light of different angles in a larger angle range so as to meet the testing requirement of an optical waveguide with a large incident angle.
Another advantage of the present utility model is to provide an optical waveguide testing apparatus, wherein in an embodiment of the present utility model, the optical waveguide testing apparatus can provide a test light beam that is more matched to the wavelength of the optical waveguide design, so as to ensure a better test effect.
Another advantage of the present utility model is to provide an optical waveguide testing apparatus in which expensive materials or complex structures are not required in the present utility model in order to achieve the above objects. The present utility model thus successfully and efficiently provides a solution that not only provides a simple optical waveguide testing apparatus, but also increases the practicality and reliability of the optical waveguide testing apparatus.
To achieve at least one of the above or other advantages and objects of the utility model, there is provided an optical waveguide testing apparatus including:
the test platform is used for placing the optical waveguide to be tested and is provided with an incident test bit corresponding to the coupling-in area of the optical waveguide to be tested and an emergent test bit corresponding to the coupling-out area of the optical waveguide to be tested;
the projection component is fixedly arranged on the test platform to correspond to the incident test position and is used for projecting test light rays towards the incident test position;
the angle adjusting component is a wedge-shaped prism group positioned in the light path between the projection component and the incidence test position, and the wedge-shaped prism group is rotatably arranged on the test platform and is used for adjusting the propagation direction of the test light so as to form the incidence light which propagates to the incidence test position according to different incidence angles;
the first test assembly is arranged on the test platform to correspond to the incident test position, and the first test assembly and the angle adjusting assembly are respectively positioned on two opposite sides of the incident test position, and the first test assembly is used for collecting the incident light when the optical waveguide to be tested is not placed so as to measure the coupling-in luminous flux and the coupling-in chromaticity of the optical waveguide to be tested; and
the second testing component is arranged on the testing platform to correspond to the emergent testing position and is used for collecting emergent light coupled out through the optical waveguide to be tested when the optical waveguide to be tested is placed, so as to measure the coupling-out luminous flux and the coupling-out chromaticity of the optical waveguide to be tested.
According to one embodiment of the utility model, the first test assembly comprises a first integrating sphere rotatably arranged on the test platform and a first spectrometer connected with the first integrating sphere; the first integrating sphere is rotated to adjust a receiving angle and is used for vertically receiving the incident light to obtain the coupling-in luminous flux of the optical waveguide to be tested; the first spectrometer is used for analyzing the chromaticity of the incident light received by the first integrating sphere so as to obtain the coupling chromaticity of the optical waveguide to be measured.
According to one embodiment of the utility model, the second test assembly comprises a mirror rotatably arranged on the test platform, a second integrating sphere positioned on the reflecting side of the mirror, and a second spectrometer connected with the second integrating sphere; the reflecting mirror is rotated to adjust the propagation direction of the emergent light coupled out by the optical waveguide to be tested, so that the emergent light is vertically incident to the second integrating sphere; the second integrating sphere is used for receiving the emergent light reflected by the reflecting mirror so as to obtain the coupled light flux of the optical waveguide to be tested; the second spectrometer is used for analyzing the chromaticity of the emergent light received by the second integrating sphere so as to obtain the coupling chromaticity of the optical waveguide to be measured.
According to one embodiment of the present utility model, the second test assembly further includes a beam shrinking lens set, disposed in an optical path between the reflecting mirror and the second integrating sphere, for shrinking the outgoing light reflected by the reflecting mirror and then injecting the condensed outgoing light into the second integrating sphere.
According to an embodiment of the present utility model, the beam reduction lens group includes a positive focal lens and a negative focal lens, which are sequentially arranged on the same optical axis in an optical path between the reflecting mirror and the second integrating sphere, and the positive focal lens is located in the optical path between the reflecting mirror and the negative focal lens.
According to one embodiment of the utility model, the wedge prism group comprises a first wedge prism and a second wedge prism which are respectively rotatably arranged on the test platform, and the first wedge prism and the second wedge prism are sequentially positioned in the optical path between the projection assembly and the incidence test position.
According to one embodiment of the utility model, the projection assembly includes a light source assembly for emitting the test light and a pentagonal prism in an optical path between the light source assembly and the angle adjustment assembly for diverting the test light emitted via the light source assembly for propagation to the angle adjustment assembly.
According to one embodiment of the utility model, the light source assembly comprises a first laser for emitting red light, a second laser for emitting green light, a third laser for emitting blue light, a beam combiner for combining red, green and blue light into a bundle of test light, a first collimator located in an optical path between the first laser and the beam combiner, a second collimator located in an optical path between the second laser and the beam combiner, a third collimator located in an optical path between the third laser and the beam combiner, and a diaphragm located in an optical path between the beam combiner and the pentagonal prism.
According to one embodiment of the present utility model, the beam combiner is a color combining prism, and four sides of the color combining prism face the first collimator, the second collimator, the third collimator, and the diaphragm, respectively.
According to one embodiment of the utility model, the first collimator, the second collimator and the third collimator are all fiber collimators; the first collimator, the second collimator and the third collimator are respectively and correspondingly connected with the first laser, the second laser and the third laser through optical fibers.
Drawings
FIG. 1 is a schematic diagram of an optical waveguide testing apparatus according to an embodiment of the present utility model in a state in which an optical waveguide to be tested is not placed;
FIG. 2 is a schematic view showing a state of the optical waveguide testing apparatus according to the above embodiment of the present utility model when an optical waveguide to be tested is placed;
fig. 3 shows a modified example of the optical waveguide testing apparatus according to the above embodiment of the present utility model;
FIG. 4 shows a schematic view of the deflection angle of a first wedge prism in an optical waveguide testing apparatus according to the above embodiment of the present utility model;
fig. 5 shows a schematic view of the translation of the optical waveguide to be tested during testing by the optical waveguide testing apparatus according to the above embodiment of the present utility model.
Description of the reference numerals: 1. an optical waveguide testing device; 10. a test platform; 101. incidence test bit; 102. emitting out a test position; 20. a projection assembly; 21. a light source assembly; 211. a first laser; 212. a second laser; 213. a third laser; 214. a beam combiner; 215. a first collimator; 216. a second collimator; 217. a third collimator; 218. a diaphragm; 219. an optical fiber; 22. pentagonal prism; 30. an angle adjustment assembly; 300. wedge prism group; 31. a first wedge prism; 32. a second wedge prism; 40. a first test assembly; 41. a first integrating sphere; 42. a first spectrometer; 50. a second test assembly; 51. a reflecting mirror; 52. a second integrating sphere; 53. a second spectrometer; 54. a beam shrinking lens group; 541. a positive focal lens; 542. a negative focal lens; 9. an optical waveguide to be measured; 91. a coupling-in region; 92. and a coupling-out region.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It is noted that when an element is referred to as being "disposed" or "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.
Considering that in order to test the light efficiency of the optical waveguide under the oblique incidence angle in the prior art, the optical waveguide has to be rotated to adjust the angle, but products are easily damaged in the process of adjusting the angle of the optical waveguide, and the test requirement of production cannot be met. In order to solve the above problems, the present utility model provides an optical waveguide testing device, which can measure the luminous flux and chromaticity of an optical waveguide at different incident angles without rotating the optical waveguide, so as to comprehensively evaluate the optical performance of the optical waveguide without damaging the optical waveguide.
Referring to fig. 1 to 5, an embodiment of the present utility model provides an optical waveguide testing apparatus 1, which may include a testing platform 10 for placing an optical waveguide 9 to be tested, a projection assembly 20, an angle adjustment assembly 30, a first testing assembly 40, and a second testing assembly 50. It will be appreciated that the optical waveguide 9 to be tested according to the present utility model has an in-coupling region 91 for in-coupling light and an out-coupling region 92 for out-coupling light.
More specifically, as shown in fig. 1 and 2, the test bench 10 has an incident test bit 101 for corresponding to the coupling-in region 91 of the optical waveguide 9 to be tested and an outgoing test bit 102 for corresponding to the coupling-out region 92 of the optical waveguide 9 to be tested. The projecting component 20 is fixed on the test platform 10 to correspond to the incident test site 101, and is used for projecting test light towards the incident test site 101. The angle adjustment assembly 30 may be implemented as a wedge prism assembly 300 positioned in the optical path between the projection assembly 20 and the incident test site 101; the wedge prism set 300 is rotatably disposed on the test platform 10 for adjusting the propagation direction of the test light projected by the projection assembly 20 to form incident light propagating to the incident test site 101 at different incident angles, so that the incident light can be incident to the coupling region 91 of the optical waveguide 9 to be tested at different incident angles to be coupled in. The first testing component 40 is disposed on the testing platform 10 to correspond to the incident test site 101, and the first testing component 40 and the angle adjusting component 30 are respectively disposed on two opposite sides of the incident test site 101, where the first testing component 40 is configured to collect the incident light adjusted by the angle adjusting component 30 when the optical waveguide 9 to be tested is not disposed, so as to measure the coupling-in luminous flux and the coupling-in chromaticity of the optical waveguide 9 to be tested under different incident angles. The second testing component 50 is disposed on the testing platform 10 to correspond to the outgoing test site 102, and the second testing component 50 is used for collecting outgoing light coupled out through the optical waveguide 9 to be tested when the optical waveguide 9 to be tested is placed, so as to measure the coupling-out luminous flux and the coupling-out chromaticity of the optical waveguide 9 to be tested under different incident angles.
It should be noted that, when the optical waveguide 9 to be tested is not placed on the test platform 10, the light projected by the projection component 20 passes through the incident test site 101 and is directly received by the first test component 40 after the angle is adjusted by the angle adjustment component 30, so as to measure the coupling-in luminous flux and the coupling-in chromaticity; when the optical waveguide 9 to be tested is placed on the test platform 10, the light projected by the projection component 20 is coupled into the optical waveguide 9 to be tested through the coupling region 91 at the incident test position 101 after the angle is adjusted by the angle adjusting component 30, and then coupled out of the optical waveguide 9 to be tested through the coupling region 92 at the emergent test position 102, and received by the second test component 50 to measure the coupled-out luminous flux and the coupled-out chromaticity, so that the luminous flux variation and the chromaticity variation of the optical waveguide 9 to be tested under a certain incident angle can be obtained by comparing the coupled-out luminous flux and the coupled-in chromaticity with the coupled-in luminous flux and the coupled-in chromaticity respectively.
Meanwhile, the optical waveguide testing device 1 of the present utility model adjusts the propagation direction of the test light by rotating the wedge prism set 300 relative to the testing platform 10, so that the incident light is incident to the incident testing position 101 at different incident angles, so as to be coupled in at different incident angles when the optical waveguide 9 to be tested is placed, therefore, the optical waveguide testing device 1 of the present utility model can measure the coupling-in luminous flux, coupling-in chromaticity, coupling-out luminous flux and coupling-out chromaticity of the optical waveguide 9 to be tested at different incident angles without rotating the optical waveguide 9 to be tested, and can accurately obtain the luminous flux variation and the chromaticity variation of the optical waveguide 9 to be tested at different incident angles through classification comparison, so as to comprehensively and accurately evaluate the optical performance of the optical waveguide 9 to be tested.
Illustratively, as shown in fig. 1 and 2, the optical waveguide 9 to be measured may be implemented as, but is not limited to, a reflective optical waveguide, i.e. the coupling-in region 91 and the coupling-out region 92 in the optical waveguide 9 to be measured are oriented towards the same side. Meanwhile, the first test component 40 and the second test component 50 are respectively located at two opposite sides of the optical waveguide 9 to be tested; the angle adjusting assembly 30 and the second testing assembly 50 are located on the same side of the optical waveguide 9 under test.
It is noted that in a variant of the utility model, as shown in fig. 3, the optical waveguide 9 to be measured according to the utility model may also be implemented as a transmissive optical waveguide, i.e. the coupling-in region 91 and the coupling-out region 92 of the optical waveguide 9 to be measured are oriented towards different sides. Meanwhile, the first test component 40 and the second test component 50 are respectively located on the same side of the optical waveguide 9 to be tested; the angle adjustment assembly 30 and the second test assembly 50 are located on opposite sides of the optical waveguide 9 under test. That is, when the light efficiency test is required for the transmissive optical waveguide, only the position of the second testing component 50 needs to be moved integrally, so that the optical waveguide testing device 1 of the present utility model can be compatible with the light efficiency test for the reflective optical waveguide and the transmissive optical waveguide.
Alternatively, as shown in fig. 1 and 2, the first test assembly 40 may include a first integrating sphere 41 rotatably provided to the test platform 10 and a first spectrometer 42 connected to the first integrating sphere 41; the first integrating sphere 41 is rotated to adjust the receiving angle for receiving the incident light vertically to obtain the coupling-in luminous flux of the optical waveguide 9 to be measured; the first spectrometer 42 is used for analyzing the chromaticity of the incident light received through the first integrating sphere 41 to obtain the coupling chromaticity of the optical waveguide 9 to be measured. It can be understood that if the first integrating sphere 41 cannot be rotated to adjust the receiving angle, the incident light after being adjusted by the angle adjusting component 30 cannot be guaranteed to perpendicularly enter the first integrating sphere 41, which easily results in that the first integrating sphere 41 cannot accurately measure the light flux of the incident light, resulting in inaccurate measurement result of the coupled light flux, and difficulty in accurately evaluating the optical performance of the optical waveguide 9 to be measured.
Alternatively, as shown in fig. 1 and 2, the second testing assembly 50 may include a mirror 51 rotatably disposed on the testing platform 10, a second integrating sphere 52 located on a reflective side of the mirror 51, and a second spectrometer 53 connected to the second integrating sphere 52; the reflecting mirror 51 is rotated to adjust the propagation direction of the outgoing light coupled out through the optical waveguide 9 to be measured so that the outgoing light is vertically incident on the second integrating sphere 52; the second integrating sphere 52 is configured to receive the outgoing light reflected by the reflecting mirror 51, so as to obtain the coupled light flux of the optical waveguide 9 to be measured; the second spectrometer 53 is used for analyzing the chromaticity of the outgoing light received through the second integrating sphere 52 to obtain the coupling chromaticity of the optical waveguide 9 to be measured. It can be understood that, when the incident light is incident on the coupling-in region 91 of the optical waveguide 9 under test at different incident angles, the propagation directions of the outgoing light coupled out through the coupling-out region 92 of the optical waveguide 9 under test will also be different; the present utility model can ensure that the second integrating sphere 52 can vertically receive the outgoing light by rotating the reflecting mirror 51, so as to accurately measure the coupled light flux of the optical waveguide 9 to be measured under different incident angles.
Optionally, as shown in fig. 1 and 2, the second testing component 50 may further include a beam shrinking lens set 54, where the beam shrinking lens set 54 is disposed in the optical path between the reflecting mirror 51 and the second integrating sphere 52, and is used for shrinking the outgoing light reflected by the reflecting mirror 51 and then injecting the outgoing light into the second integrating sphere 52. It should be understood that, although the pupil expansion process is performed on the optical waveguide 9 to be measured when transmitting light, so that the outgoing light coupled out from the coupling-out region 92 tends to have a larger beam diameter, the beam shrinking lens set 54 of the present utility model can shrink the outgoing light having a larger beam diameter into the outgoing light having a smaller beam diameter, so that the second integrating sphere 52 receives the outgoing light entirely and accurately measures the coupling-out light flux of the optical waveguide 9 to be measured.
Preferably, as shown in fig. 1 and 2, the beam reduction lens group 54 may include a positive focal lens 541 and a negative focal lens 542, the positive focal lens 541 and the negative focal lens 542 being sequentially arranged with the optical axis in the optical path between the reflecting mirror 51 and the second integrating sphere 52, and the positive focal lens 541 being located in the optical path between the reflecting mirror 51 and the negative focal lens 542. Thus, the outgoing light reflected by the reflecting mirror 51 is converged by the positive focal lens 541 and diverged by the negative focal lens 542, so that the outgoing light can maintain the same divergence angle, such as parallel light, before and after beam shrinking.
It should be noted that, in other examples of the present utility model, the beam reduction lens set 54 may also be composed of two positive focal lenses, such as a first positive focal lens with a larger focal length and a second positive focal lens with a smaller focal length, so that the outgoing light can still maintain the same divergence angle after passing through the first positive focal lens and the second positive focal lens, which is not described in detail herein.
Furthermore, the wedge prism set 300 of the present utility model may include one or more wedge prisms. For example, in the above-described embodiment of the present utility model, as shown in fig. 1 and 2, the wedge prism assembly 300 may include a first wedge prism 31 and a second wedge prism 32 rotatably disposed on the test stage 10, respectively, the first wedge prism 31 and the second wedge prism 32 being sequentially positioned in the optical path between the projection assembly 20 and the incident test site 101. Thus, rotating the first wedge prism 31 and the second wedge prism 32, respectively, can deflect the light beam at various angles over a wide range of 4θ for simulating incident light at different incident angles. It is understood that the larger range of 4θ referred to by the present utility model refers to four times the deflection angle θ of a single wedge prism.
In addition, as shown in fig. 1 and 2, the projection module 20 of the present utility model may include a light source module 21 for emitting the test light and a pentagonal prism 22, the pentagonal prism 22 being located in an optical path between the light source module 21 and the angle adjustment module 30 for diverting the test light emitted through the light source module 21 to propagate to the angle adjustment module 30, avoiding the light source module 21 from interfering with the second test module 50. It will be appreciated that the pentagonal prism 22 according to the present utility model is one of the beam steering devices with a fixed angle (90 °), and is capable of steering the beam by 90 ° regardless of the incident angle on the incident surface, which helps to reduce the installation accuracy of the pentagonal prism 22.
Alternatively, as shown in fig. 1 and 2, the light source assembly 21 may include a first laser 211 for emitting red light, a second laser 212 for emitting green light, a third laser 213 for emitting blue light, a beam combiner 214 for combining red, green and blue light into one test light, a first collimator 215 located in an optical path between the first laser 211 and the beam combiner 214, a second collimator 216 located in an optical path between the second laser 212 and the beam combiner 214, a third collimator 217 located in an optical path between the third laser 213 and the beam combiner 214, and a stop 218 located in an optical path between the beam combiner 214 and the pentagonal prism 22. Thus, the red light, the green light and the blue light emitted by the first laser 211, the second laser 212 and the third laser 213 respectively pass through the first collimator 215, the second collimator 216 and the third collimator 217 respectively, and are collimated by the beam combiner 214 to be combined into white light, so as to propagate to the pentagonal prism 22 through the diaphragm 218. It can be understood that the light source assembly 21 of the present utility model adopts a trichromatic laser to make the optical waveguide testing device 1 have good monochromaticity, so that the design wavelength of the optical waveguide 9 to be tested is more matched, and a better testing effect is ensured.
It should be noted that the first laser 211, the second laser 212 and the third laser 213 in the light source module 21 of the present utility model can be controlled independently, so as to perform a light efficiency test on a single-color waveguide when one of the lasers is controlled to be individually lighted; when two or more lasers are controlled to be lightened simultaneously, the light efficiency test can be carried out on the overlapped waveguide; that is, the optical waveguide 9 to be tested according to the present utility model may be a monochromatic waveguide or a folded waveguide, that is, the optical waveguide testing device 1 according to the present utility model is compatible with the light efficiency test of the monochromatic waveguide and the folded waveguide.
Optionally, the beam combiner 214 may be implemented as, but is not limited to, a color combining prism (i.e., an X-cube prism), wherein four sides of the color combining prism face the first collimator 215, the second collimator 216, the third collimator 217, and the aperture 218, respectively, so as to combine red, green, and blue light collimated by the first collimator 215, the second collimator 216, and the third collimator 217, respectively, into a beam of white light to pass through the aperture 218 to adjust a beam size.
Preferably, as shown in fig. 1 and 2, the first collimator 215, the second collimator 216 and the third collimator 217 are all implemented as fiber collimators; and the first collimator 215, the second collimator 216 and the third collimator 217 are respectively and correspondingly connected to the first laser 211, the second laser 212 and the third laser 213 through optical fibers 219, so as to improve the collimation effect of the light, further improve the color combination effect, and facilitate more accurate measurement of the light efficiency of the superimposed waveguide.
Illustratively, the optical waveguide testing apparatus 1 of the present utility model performs the following steps of light efficiency testing for a monochromatic waveguide: 1) Opening one of the first laser, the second laser and the third laser, and enabling the light beam to enter a corresponding optical fiber collimator through optical fiber coupling to become a monochromatic parallel light beam; 2) The monochromatic parallel light beam propagates to the diaphragm through the X-Cube so as to adjust the size of the light spot through the diaphragm; 3) The single-color parallel light beam passes through the pentagonal prism, the propagation direction of the light beam is changed by 90 degrees, and the light beam is incident to the wedge-shaped prism group; 4) Adjusting the beam deflection angle of the wedge prism group to the product design angle (as shown in fig. 4, the beam deflection angle delta can be obtained by the refractive index n and the wedge angle alpha of the wedge prism; the formula: δ=sin-1 (n sin α) - α), changing the parallel beam propagation angle; 5) The method comprises the steps that a monochromatic waveguide is not placed, the angle of a first integrating sphere is adjusted, and the initial luminous flux and the initial chromaticity of a parallel beam are tested by using the first integrating sphere and a first spectrometer so as to obtain the coupling luminous flux and the coupling chromaticity of the monochromatic waveguide; 6) Placing and translating the monochromatic waveguide so that the incident beam is coupled in from the coupling center of the monochromatic waveguide at a design angle (as shown in fig. 5, the translation distance L is dependent on the distance D between the wedge prism group and the coupling-in region and the beam deflection angle δ; the formula: l=dtan delta); 7) The reflector is adjusted to a specific angle (the specific angle is adjusted according to the coupling-out angle of the product design), and the coupled parallel light beams vertically enter the second integrating sphere after being condensed by the beam condensing lens group; 8) Analyzing by test software to obtain the luminous flux and chromaticity of the coupled parallel light beam so as to obtain the coupled luminous flux and coupled chromaticity of the monochromatic waveguide; 9) Compared with the coupling-in luminous flux and the coupling-in chromaticity, the light transmission efficiency and chromaticity variation of the monochromatic waveguide coupling in the product design angle can be obtained; 10 Light transmission efficiency and chromaticity variation are judged by test software according to threshold values (according to product design and production conditions) whether the light transmission efficiency and chromaticity variation are compliant or not; 11 The angles and positions of the wedge prism group, the first integrating sphere and the reflecting mirror are continuously adjusted, so that the light transmission efficiency and chromaticity change of the monochromatic waveguide under different incidence angles can be obtained, and the light efficiency evaluation can be carried out.
In addition, the optical waveguide testing device 1 of the present utility model performs the steps of light efficiency testing on the folded waveguide as follows: 1) The first laser, the second laser and the third laser are turned on, and the light beams are coupled into corresponding optical fiber collimators through optical fibers to form three monochromatic parallel light beams; 2) Three monochromatic parallel beams are combined into a combined color parallel beam by an X-Cube, and the size of a combined color light spot is adjusted by using a diaphragm; 3) The color-combined parallel light beam passes through a pentagonal prism, the propagation direction of the light beam is changed by 90 degrees, and the light beam is incident to a wedge-shaped prism group; 4) The beam deflection angle of the wedge-shaped prism group is adjusted to the product design angle, and the parallel beam propagation angle is changed; 5) The method comprises the steps that a superimposed waveguide is not placed, the angle of a first integrating sphere is adjusted, and the first integrating sphere and a first spectrometer are used for testing initial luminous flux and initial chromaticity of parallel light beams so as to obtain coupling luminous flux and coupling chromaticity of the superimposed waveguide; 6) Placing and translating the superposition waveguide to couple the incident light beam from the coupling center of the superposition waveguide at a design angle; 7) The reflector is adjusted to a specific angle (the specific angle is adjusted according to the coupling-out angle of the product design), and the coupled parallel light beams vertically enter the second integrating sphere after being condensed by the beam condensing lens group; 8) Analyzing by test software to obtain the luminous flux and chromaticity of the coupled parallel light beams so as to obtain the coupled luminous flux and the coupled chromaticity of the overlapped waveguide; 9) Comparing the coupled light flux and the coupled chromaticity, the light transmission efficiency and chromaticity variation of the superimposed waveguide coupled in at the product design angle can be obtained; 10 Judging whether the light transmission efficiency and the chromaticity change are compliant or not by test software according to the threshold value; 11 The angles and positions of the wedge prism group, the first integrating sphere and the reflecting mirror are continuously adjusted, so that the light transmission efficiency and chromaticity change of the superimposed waveguide under different incidence angles can be obtained, and the light efficiency evaluation can be carried out.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. An optical waveguide testing apparatus, comprising:
the test platform is used for placing the optical waveguide to be tested and is provided with an incident test bit corresponding to the coupling-in area of the optical waveguide to be tested and an emergent test bit corresponding to the coupling-out area of the optical waveguide to be tested;
the projection component is fixedly arranged on the test platform to correspond to the incident test position and is used for projecting test light rays towards the incident test position;
the angle adjusting component is a wedge-shaped prism group positioned in the light path between the projection component and the incidence test position, and the wedge-shaped prism group is rotatably arranged on the test platform and is used for adjusting the propagation direction of the test light so as to form the incidence light which propagates to the incidence test position according to different incidence angles;
the first test assembly is arranged on the test platform to correspond to the incident test position, and the first test assembly and the angle adjusting assembly are respectively positioned on two opposite sides of the incident test position, and the first test assembly is used for collecting the incident light when the optical waveguide to be tested is not placed so as to measure the coupling-in luminous flux and the coupling-in chromaticity of the optical waveguide to be tested; and
the second testing component is arranged on the testing platform to correspond to the emergent testing position and is used for collecting emergent light coupled out through the optical waveguide to be tested when the optical waveguide to be tested is placed, so as to measure the coupling-out luminous flux and the coupling-out chromaticity of the optical waveguide to be tested.
2. The optical waveguide testing apparatus of claim 1, wherein the first testing assembly comprises a first integrating sphere rotatably disposed on the testing platform and a first spectrometer coupled to the first integrating sphere; the first integrating sphere is rotated to adjust a receiving angle and is used for vertically receiving the incident light to obtain the coupling-in luminous flux of the optical waveguide to be tested; the first spectrometer is used for analyzing the chromaticity of the incident light received by the first integrating sphere so as to obtain the coupling chromaticity of the optical waveguide to be measured.
3. The optical waveguide testing apparatus according to claim 1, wherein the second testing assembly comprises a mirror rotatably disposed on the testing stage, a second integrating sphere located on a reflective side of the mirror, and a second spectrometer connected to the second integrating sphere; the reflecting mirror is rotated to adjust the propagation direction of the emergent light coupled out by the optical waveguide to be tested, so that the emergent light is vertically incident to the second integrating sphere; the second integrating sphere is used for receiving the emergent light reflected by the reflecting mirror so as to obtain the coupled light flux of the optical waveguide to be tested; the second spectrometer is used for analyzing the chromaticity of the emergent light received by the second integrating sphere so as to obtain the coupling chromaticity of the optical waveguide to be measured.
4. The optical waveguide testing apparatus according to claim 3, wherein the second testing component further comprises a beam reduction lens group disposed in an optical path between the reflecting mirror and the second integrating sphere, for reducing the outgoing light reflected by the reflecting mirror and then entering the second integrating sphere.
5. The optical waveguide testing apparatus according to claim 4, wherein the beam reduction lens group includes a positive focal lens and a negative focal lens, the positive focal lens and the negative focal lens being sequentially arranged on the same optical axis in an optical path between the reflecting mirror and the second integrating sphere, and the positive focal lens being located in the optical path between the reflecting mirror and the negative focal lens.
6. The optical waveguide testing apparatus according to any one of claims 1 to 5, wherein the wedge prism group comprises a first wedge prism and a second wedge prism rotatably disposed to the test stage, respectively, the first wedge prism and the second wedge prism being positioned in sequence in an optical path between the projection assembly and the incident test site.
7. The optical waveguide testing apparatus according to any one of claims 1 to 5, wherein the projection assembly comprises a light source assembly for emitting the test light and a pentagonal prism located in an optical path between the light source assembly and the angle adjustment assembly for diverting the test light emitted via the light source assembly for propagation to the angle adjustment assembly.
8. The optical waveguide testing apparatus according to claim 7, wherein said light source assembly comprises a first laser for emitting red light, a second laser for emitting green light, a third laser for emitting blue light, a beam combiner for combining red, green and blue light into a single test light, a first collimator located in an optical path between said first laser and said beam combiner, a second collimator located in an optical path between said second laser and said beam combiner, a third collimator located in an optical path between said third laser and said beam combiner, and a diaphragm located in an optical path between said beam combiner and said pentagonal prism.
9. The optical waveguide testing apparatus according to claim 8, wherein the beam combiner is a color combining prism, four sides of the color combining prism facing the first collimator, the second collimator, the third collimator, and the diaphragm, respectively.
10. The optical waveguide testing apparatus according to claim 9, wherein the first collimator, the second collimator, and the third collimator are all fiber collimators; the first collimator, the second collimator and the third collimator are respectively and correspondingly connected with the first laser, the second laser and the third laser through optical fibers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320950624.4U CN219777046U (en) | 2023-04-24 | 2023-04-24 | Optical waveguide testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320950624.4U CN219777046U (en) | 2023-04-24 | 2023-04-24 | Optical waveguide testing device |
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| CN219777046U true CN219777046U (en) | 2023-09-29 |
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