An optical coupling device and method

Abstract

The application provides an optical coupling device and method, relates to the technical field of optical coupling, and the device comprises a light source plate adjuster, a dichroic mirror adjuster, a beam splitter, a near-field target surface, a far-field target surface, a monitoring module and a multi-band optical system to be adjusted. The beam splitter is arranged at an outlight port of the multi-band optical system to be adjusted, and is used for dividing the outgoing light of the multi-band optical system to be adjusted into a first light beam transmitted along an X-axis direction and a second light beam transmitted along a Y-axis direction. The near-field target surface is arranged in front of the beam splitter along the X-axis direction, and the far-field target surface is arranged in front of the beam splitter along the Y-axis direction. The monitoring module is used for monitoring the near-field target surface and the far-field target surface in real time and outputting a first offset and a second offset, so that the center position of a main light spot can be continuously and quickly observed, and the offset of the main light spot does not need to be manually measured. The positions of optical devices can be accurately adjusted through the dichroic mirror adjuster and the light source plate adjuster, so that the optical coupling precision and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical coupling, in particular to an optical coupling device and method. BACKGROUND

[0002] Multi-band light sources are increasingly applied in the fields of biological medical fluorescence detection, industrial detection equipment, etc. A multi-band light source has at least two light sources coupled together through a dichroic mirror or the like. Therefore, each light path needs to be adjusted so that the light beams are combined together, ensuring that the directions and positions of the light beams of each wave are consistent, and the light paths of each wave are coaxial.

[0003] At present, the coaxiality of many light paths is mainly preliminarily positioned by structure limiting, and then manually adjusted to complete the coaxiality correction of the light paths. However, the effect of adjustment by different people may be different, and the efficiency is low.

[0004] Therefore, how to improve the coupling precision and efficiency of the multi-band light source is a technical problem to be solved by those skilled in the art. SUMMARY

[0005] The present application aims to provide an optical coupling device and method to improve the coupling precision and efficiency of the multi-band light source.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0007] On the one hand, the present application provides an optical coupling device, comprising: a light source plate adjuster, a dichroic mirror adjuster, a beam splitter, a near-field target surface, a far-field target surface, a monitoring module and a multi-band optical system to be adjusted; the multi-band optical system to be adjusted comprises at least two light source plates and at least one dichroic mirror, and the at least two light source plates comprise a first light source plate and at least one second light source plate; wherein the number of the second light source plates is equal to the number of the dichroic mirrors;

[0008] The beam splitter is arranged at the light outlet of the multi-band optical system to be adjusted, and the beam splitter is used to divide the outgoing light of the multi-band optical system to be adjusted into a first light beam transmitted along the X-axis direction and a second light beam transmitted along the Y-axis direction; the near-field target surface is arranged in front of the beam splitter along the X-axis direction, and the far-field target surface is arranged in front of the beam splitter along the Y-axis direction; wherein the distance between the far-field target surface and the beam splitter is greater than the distance between the near-field target surface and the beam splitter;

[0009] The monitoring module is configured to monitor the near-field target surface and the far-field target surface to output a first offset and a second offset corresponding to each light source plate; the first offset is a distance between a center point of a main light spot of the first light beam irradiated on the near-field target surface and a reference point on the near-field target surface, and the second offset is a distance between a center point of a main light spot of the second light beam irradiated on the far-field target surface and a reference point on the far-field target surface;

[0010] The light source plate adjuster is configured to adjust the position of the first light source plate until the first offset and the second offset corresponding to the first light source plate output by the monitoring module are both zero.

[0011] The dichroic mirror adjuster is configured to adjust the position of the dichroic mirror corresponding to the second light source plate until the secondary light spot formed by the second light source plate coincides with the secondary light spot formed by the first light source plate.

[0012] The light source plate adjuster is further configured to adjust the position of the second light source plate until the first offset and the second offset corresponding to the second light source plate output by the monitoring module are both zero.

[0013] Further, the optical coupling device further comprises a fixed table, and the multi-band optical system to be adjusted, the light source plate adjuster and the beam splitter are all mounted on the fixed table.

[0014] Further, the optical coupling device further comprises an X-axis and Y-axis coarse adjustment platform; the fixed table is arranged inside the X-axis and Y-axis coarse adjustment platform, the dichroic mirror adjuster is suspended on the inner top of the X-axis and Y-axis coarse adjustment platform, and the X-axis and Y-axis coarse adjustment platform is configured to drive the dichroic mirror adjuster to move along the X-axis direction or the Y-axis direction.

[0015] Further, the dichroic mirror adjuster comprises a Z-axis adjustment platform, an X-axis fine adjustment platform, a Y-axis fine adjustment platform, a Z-axis rotation platform, an angle offset platform and a holder.

[0016] The top of the Z-axis adjustment platform is connected with the inner top of the X-axis and Y-axis coarse adjustment platform, the Z-axis adjustment platform, the X-axis fine adjustment platform, the Y-axis fine adjustment platform, the Z-axis rotation platform and the angle offset platform are all connected with one end of the holder, and the other end of the holder is connected with the dichroic mirror.

[0017] The dichroic mirror adjuster is configured to adjust the dichroic mirror to translate along the Z-axis, the X-axis and the Y-axis, to rotate around the Z-axis, and to adjust the vertical direction angle offset.

[0018] Further, the monitoring module comprises a first camera, a second camera and a processor; the first camera is installed below the fixed table close to the beam splitter along the X-axis direction, and the first camera is arranged opposite to the near-field target surface; the second camera is installed below the fixed table close to the beam splitter along the Y-axis direction, and the second camera is arranged opposite to the far-field target surface; the first camera and the second camera are connected with the processor;

[0019] The first camera is used for collecting a first image formed by the first light beam irradiating on the near-field target surface, and the second camera is used for collecting a second image formed by the second light beam irradiating on the far-field target surface.

[0020] The processor is used for outputting the first offset according to the first image, and the processor is also used for outputting the second offset according to the second image.

[0021] Further, the light source plate adjuster comprises a Z-axis fine adjustment component, a Y-axis fine adjustment component, a moving part and a fixed part;

[0022] The Z-axis fine adjustment component and the Y-axis fine adjustment component are arranged on the moving part, the moving part is installed on the light source plate to be adjusted, the fixed part is installed on the fixed table, and the moving part and the fixed part are connected vertically;

[0023] The light source plate adjuster is used for translating the light source plate to be adjusted along the Z-axis and the Y-axis directions.

[0024] Further, the first light source plate comprises a first lamp bead and a first collimating mirror group arranged oppositely, and the second light source plate comprises a second lamp bead and a second collimating mirror group arranged oppositely;

[0025] The first collimating mirror group is used for imaging the first lamp bead on the near-field target surface and the far-field target surface, and the second collimating mirror group is used for imaging the second lamp bead on the near-field target surface and the far-field target surface.

[0026] On the other hand, the embodiment of the present application also provides an optical coupling method applied to the optical coupling device as described in any one of the preceding embodiments, and the optical coupling method comprises:

[0027] The position of the first light source plate is adjusted by the light source plate adjuster until the first offset and the second offset corresponding to the first light source plate output by the monitoring module are both zero;

[0028] The position of the dichroic mirror corresponding to the second light source plate is adjusted by the dichroic mirror adjuster until the secondary light spot formed by the second light source plate coincides with the secondary light spot formed by the first light source plate;

[0029] adjusting the position of the second light source plate by the light source plate adjuster until the first offset and the second offset corresponding to the second light source plate output by the monitoring module are both zero;

[0030] returning to the step of adjusting the position of the dichroic mirror corresponding to the second light source plate by the dichroic mirror adjuster until all the light source plates and dichroic mirrors in the multi-band optical system to be adjusted are adjusted.

[0031] Further, the first light source plate comprises a first lamp bead and a first collimating mirror group arranged oppositely; before the step of adjusting the position of the first light source plate by the light source plate adjuster, the optical coupling method further comprises:

[0032] adjusting the first collimating mirror group after the first lamp bead is lighted to make the first lamp bead image on the near-field target surface and the far-field target surface.

[0033] Further, the second light source plate comprises a second lamp bead and a second collimating mirror group arranged oppositely; before the step of adjusting the position of the dichroic mirror corresponding to the second light source plate by the dichroic mirror adjuster, the optical coupling method further comprises:

[0034] lighting the first lamp bead and the second lamp bead at the same time and adjusting the second collimating mirror group to make the second lamp bead image on the near-field target surface and the far-field target surface.

[0035] Compared with the prior art, the present application has the following beneficial effects:

[0036] The present application provides an optical coupling device and method, which comprises a light source plate adjuster, a dichroic mirror adjuster, a beam splitter, a near-field target surface, a far-field target surface, a monitoring module and a multi-band optical system to be adjusted. The beam splitter is arranged at the light outlet of the multi-band optical system to be adjusted, and is used to divide the outgoing light of the multi-band optical system to be adjusted into a first light beam transmitted along the X-axis direction and a second light beam transmitted along the Y-axis direction. The near-field target surface is arranged in front of the beam splitter along the X-axis direction, and the far-field target surface is arranged in front of the beam splitter along the Y-axis direction. The distance between the far-field target surface and the beam splitter is greater than the distance between the near-field target surface and the beam splitter. The monitoring module is used to monitor the near-field target surface and the far-field target surface to output the first offset and the second offset corresponding to each light source plate. The first offset is the distance between the center point of the main light spot on the near-field target surface and the reference point on the near-field target surface, and the second offset is the distance between the center point of the main light spot on the far-field target surface and the reference point on the far-field target surface.

[0037] The application can continuously and quickly observe the center position of the main light spot by monitoring the near-field target surface and the remote target surface through the monitoring module and outputting the first offset and the second offset, without manual conversion of the target surface distance and manual measurement of the main light spot offset. The positions of the optical device (i.e., the dichroic mirror and the light source plate) can be accurately adjusted through the dichroic mirror adjuster and the light source plate adjuster, which not only improves the optical coupling precision and quality, but also improves the coupling efficiency and coupling consistency. BRIEF DESCRIPTION OF DRAWINGS

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some but not all of the embodiments of the application. The components of the embodiments of the application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the application.

[0039] Figure 1 A structural schematic diagram of an optical coupling device provided by an embodiment of the application;

[0040] Figure 2 A structural schematic diagram of an optical coupling device provided by an embodiment of the application;

[0041] Figure 3 A structural schematic diagram of an optical coupling device provided by an embodiment of the application;

[0042] Figure 4 A structural schematic diagram of a dichroic mirror adjuster provided by an embodiment of the application;

[0043] Figure 5 A structural schematic diagram of a dichroic mirror adjuster provided by an embodiment of the application;

[0044] Figure 6 A structural schematic diagram of a light source plate adjuster provided by an embodiment of the application;

[0045] Figure 7 A structural schematic diagram of a light source plate adjuster provided by an embodiment of the application;

[0046] Figure 8 A flow schematic diagram of an optical coupling method provided by an embodiment of the application.

[0047] Figure: 10 - optical coupling device; 100 - light source plate adjuster; 110 - Z-axis fine adjustment component; 120 - Y-axis fine adjustment component; 130 - moving part; 140 - fixed part; 200 - dichroic mirror adjuster; 210 - Z-axis adjustment platform; 220 - X-axis fine adjustment platform; 230 - Y-axis fine adjustment platform; 240 - rotation platform around Z-axis; 250 - angle offset platform; 260 - holder; 300 - beam splitter; 400 - near field target surface; 500 - far field target surface; 600 - monitoring module; 610 - first camera; 620 - second camera; 700 - multi-band optical system to be adjusted; 710 - light source plate; 711 - first light source plate; 712 - second light source plate; 713 - third light source plate; 714 - fourth light source plate; 715 - fifth light source plate; 716 - sixth light source plate; 720 - dichroic mirror; 721 - first dichroic mirror; 722 - second dichroic mirror; 723 - third dichroic mirror; 724 - fourth dichroic mirror; 725 - fifth dichroic mirror; 800 - fixed table; 900 - X-axis Y-axis coarse adjustment platform; 910 - X-axis moving connector; 920 - Y-axis moving connector. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0049] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0050] In the description of the present application, it should be noted that the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. The term "connection" should be interpreted broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium.

[0051] Some embodiments of the present application will be described in detail with reference to the drawings. The following embodiments and features can be combined with each other in the case of no conflict.

[0052] As mentioned in the background, the current method for calibrating a multi-band light source mainly relies on structural limit to preliminarily position, and then cooperates with manual debugging to complete the coaxiality correction of the light path. However, this method has the problems of low coupling precision and low coupling efficiency.

[0053] Therefore, referring to Figures 1 to 3 , the embodiments of the present application provide an optical coupling device 10, which comprises a light source plate adjuster 100, a dichroic mirror adjuster 200, a beam splitter 300, a near-field target surface 400, a far-field target surface 500, a monitoring module 600 and a multi-band optical system to be calibrated 700.

[0054] The multi-band optical system to be calibrated 700 comprises at least two light source plates 710 and at least one dichroic mirror 720. The at least two light source plates 710 comprise a first light source plate and at least one second light source plate. The number of the second light source plates is equal to the number of the dichroic mirrors 720.

[0055] That is, the number of the dichroic mirrors 720 in the multi-band optical system to be calibrated 700 is less than the number of the light source plates 710 by one. For example, as shown in Figure 3 , the multi-band optical system to be calibrated 700 comprises a first light source plate 711, a second light source plate 712, a third light source plate 713, a fourth light source plate 714, a fifth light source plate 715, a sixth light source plate 716, a first dichroic mirror 721, a second dichroic mirror 722, a third dichroic mirror 723, a fourth dichroic mirror 724 and a fifth dichroic mirror 725.

[0056] The light beams emitted by each light source plate 710 are reflected or transmitted by the dichroic mirror 720 and then exit from the light outlet of the multi-band optical system to be calibrated 700 as outgoing light.

[0057] The beam splitter 300 is arranged at the light outlet of the multi-band optical system to be calibrated 700, and the beam splitter 300 is used to divide the outgoing light of the multi-band optical system to be calibrated 700 into a first light beam transmitted along the X-axis direction and a second light beam transmitted along the Y-axis direction.

[0058] The near-field target surface 400 is arranged in front of the beam splitter 300 along the X-axis direction, and the far-field target surface 500 is arranged in front of the beam splitter 300 along the Y-axis direction. The distance between the far-field target surface 500 and the beam splitter 300 is greater than the distance between the near-field target surface 400 and the beam splitter 300.

[0059] Optionally, the distance between the far-field target surface 500 and the beam splitter 300 can be 200 cm, and the distance between the near-field target surface 400 and the beam splitter 300 can be 50 cm. In addition, a reference point is marked on each of the near-field target surface 400 and the far-field target surface 500.

[0060] The monitoring module 600 can monitor the image of the near-field target surface 400 and the image of the far-field target surface 500, and output the first offset and the second offset corresponding to each light source plate 710. The first offset is the distance between the center point of the main spot of the first light beam irradiated on the near-field target surface 400 and the reference point on the near-field target surface 400. The second offset is the distance between the center point of the main spot of the second light beam irradiated on the far-field target surface 500 and the reference point on the far-field target surface 500.

[0061] The light source plate adjuster 100 is configured to adjust the position of the first light source plate 711 until the first offset and the second offset corresponding to the first light source plate 711 output by the monitoring module 600 are both zero.

[0062] In the embodiment of the present application, when the first offset and the second offset corresponding to the first light source plate 711 output by the monitoring module 600 are both zero, it indicates that the center points of the main spots of the first light beam and the second light beam generated after the light beam emitted by the first light source plate 711 is affected by the beam splitter 300 are aligned with the reference points on the near-field target surface 400 and the far-field target surface 500 respectively, and thus the first optical alignment is completed.

[0063] The dichroic mirror adjuster 200 is configured to adjust the position of the dichroic mirror 720 corresponding to the second light source plate 712 until the secondary spot formed by the second light source plate 712 coincides with the secondary spot formed by the first light source plate 711.

[0064] It can be understood that the light spot formed by the light beam irradiated on the target surface includes a main spot and a secondary spot surrounding the periphery of the main spot.

[0065] The light source plate adjuster 100 is further configured to adjust the position of the second light source plate 712 until the first offset and the second offset corresponding to the second light source plate 712 output by the monitoring module 600 are both zero.

[0066] In the embodiment of the present application, when the first offset and the second offset corresponding to the second light source plate 712 output by the monitoring module 600 are both zero, it indicates that the center points of the main spots of the first light beam and the second light beam generated after the light beam emitted by the second light source plate 712 is affected by the beam splitter 300 are aligned with the reference points on the near-field target surface 400 and the far-field target surface 500 respectively, and thus the second optical alignment is completed. In this way, it can be ensured that the light beam emitted by the first light source plate 711 and the light beam emitted by the second light source plate 712 are coaxial and coupled together at the light outlet of the multi-band optical system 700 to be adjusted.

[0067] If the multi-band optical system 700 to be adjusted further includes a third light source plate 713, a fourth light source plate 714, etc., the position of the light source plate 710 (i.e., the light source plate to be adjusted) corresponding to the dichroic mirror 720 (i.e., the dichroic mirror to be adjusted) can be adjusted by the dichroic mirror adjuster 200 first, and then the position of the light source plate 710 can be adjusted by the light source plate adjuster 100, until the first offset and the second offset corresponding to the light source plate 710 output by the monitoring module 600 are both zero. Repeat the steps until all the light source plates 710 and the dichroic mirrors 720 in the multi-band optical system 700 to be adjusted are coupled and adjusted.

[0068] Based on the above design, the present application positions and adjusts components through a machine vision scheme to realize automatic optical coupling. Specifically, the first offset and the second offset are output by the monitoring module 600 by monitoring the near-field target surface 400 and the far-field target surface 500 in real time, so that the center position of the main light spot can be observed continuously and quickly without manual conversion of the target surface distance and manual measurement of the main light spot offset. The positions of the optical devices can be accurately adjusted by the dichroic mirror adjuster 200 and the light source plate adjuster 100, thereby improving the optical coupling precision and quality, and the optical coupling can be repeated to improve the coupling efficiency and consistency.

[0069] In the embodiment of the present application, the optical coupling device 10 further includes a fixed table 800. The multi-band optical system 700 to be adjusted, the light source plate adjuster 100, and the beam splitter 300 are all mounted on the fixed table 800.

[0070] Further, as shown in Figure 2 and Figure 3 The monitoring module 600 includes a first camera 610, a second camera 620, and a processor (not shown in the figure). The first camera 610 is mounted below the fixed table 800 near the beam splitter 300 along the X-axis direction, and the first camera 610 is arranged opposite to the near-field target surface 400. The second camera 620 is mounted below the fixed table 800 near the beam splitter 300 along the Y-axis direction, and the second camera 620 is arranged opposite to the far-field target surface 500. In addition, the first camera 610 and the second camera 620 are connected to the processor.

[0071] The first camera 610 is used to collect a first image formed by the first light beam irradiating on the near-field target surface 400, and the second camera 620 is used to collect a second image formed by the second light beam irradiating on the far-field target surface 500.

[0072] The processor is used to output the first offset according to the first image, and the processor is also used to output the second offset according to the second image.

[0073] It can be understood that the first camera 610 can monitor the position of the main spot center point on the near-field target surface 400 in real time. The processor processes and calculates the picture (i.e., the first image) monitored by the first camera 610, thereby outputting the distance (i.e., the first offset) between the main spot center point on which the first light beam is irradiated on the near-field target surface 400 and the reference point on the near-field target surface 400.

[0074] Similarly, the second camera 620 can monitor the position of the main spot center point on the far-field target surface 500 in real time. The processor processes and calculates the picture (i.e., the second image) monitored by the second camera 620, thereby outputting the distance (i.e., the second offset) between the main spot center point on which the second light beam is irradiated on the far-field target surface 500 and the reference point on the far-field target surface 500.

[0075] In an alternative embodiment, referring again to Figure 1 , the optical coupling device 10 further comprises an X-Y coarse adjustment platform 900. The fixed table 800 is arranged inside the X-Y coarse adjustment platform 900, and the dichroic mirror adjuster 200 is suspended on the inner top of the X-Y coarse adjustment platform 900.

[0076] Specifically, the X-Y coarse adjustment platform 900 comprises an X-axis moving connector 910 and two Y-axis moving connectors 920. The two ends of the X-axis moving connector 910 are slidably connected with the two Y-axis moving connectors 920, and the top end of the dichroic mirror adjuster 200 is slidably connected with the X-axis moving connector 910.

[0077] The X-Y coarse adjustment platform 900 is used to drive the dichroic mirror adjuster 200 to move along the X-axis direction or the Y-axis direction, so that the dichroic mirror adjuster 200 can be moved to the top of any one of the dichroic mirrors 720, thereby clamping and adjusting the position of the dichroic mirror 720.

[0078] Further, referring to Figure 4 and Figure 5 , the dichroic mirror adjuster 200 comprises a Z-axis adjustment platform 210, an X-axis fine adjustment platform 220, a Y-axis fine adjustment platform 230, a Z-axis rotation platform 240, an angle offset platform 250, and a clamp 260. The top of the Z-axis adjustment platform 210 is connected with the inner top of the X-Y coarse adjustment platform 900. The Z-axis adjustment platform 210, the X-axis fine adjustment platform 220, the Y-axis fine adjustment platform 230, the Z-axis rotation platform 240, and the angle offset platform 250 are connected with one end of the clamp 260, and the other end of the clamp 260 is connected with the dichroic mirror 720.

[0079] The dichroic mirror adjuster 200 is used to adjust the translation of the dichroic mirror 720 along the Z-axis, the X-axis, and the Y-axis, the rotation of the dichroic mirror 720 around the Z-axis, and the vertical angle offset of the dichroic mirror 720.

[0080] Further, referring to Figure 6 and Figure 7 , the light source plate adjuster 100 comprises a Z-axis fine adjustment component 110, a Y-axis fine adjustment component 120, a moving component 130 and a fixed component 140. The Z-axis fine adjustment component 110 and the Y-axis fine adjustment component 120 are both arranged on the moving component 130. The moving component 130 is installed on the light source plate 710 to be adjusted, the fixed component 140 is installed on the fixed table 800, and the moving component 130 and the fixed component 140 are connected vertically.

[0081] The light source plate adjuster 100 is used to translate the light source plate 710 to be adjusted along the Z-axis and the Y-axis directions.

[0082] It should be noted that the number of the light source plate adjuster 100 can be set according to actual needs, and the number of the light source plate adjuster 100 is not limited in the embodiments of the present application.

[0083] For example, in order to save costs, the number of the light source plate adjuster 100 can be one. When the position of a certain light source plate 710 needs to be adjusted, the light source plate adjuster 100 can be installed on the light source plate 710, and then the light source plate adjuster 100 can be removed after adjustment, and then installed on the next light source plate 710 to be adjusted.

[0084] For example, in order to improve the optical coupling efficiency, the number of the light source plate adjuster 100 can be equal to the number of the light source plate 710, that is, one light source plate adjuster 100 is installed on each light source plate 710, so as to avoid the step of “removing and then installing”.

[0085] In addition, in the embodiments of the present application, the first light source plate 711 comprises a first lamp bead and a first collimating mirror group arranged oppositely, and the second light source plate 712 comprises a second lamp bead and a second collimating mirror group arranged oppositely.

[0086] The first collimating mirror group is used to image the first lamp bead on the near-field target surface 400 and the far-field target surface 500, and the second collimating mirror group is used to image the second lamp bead on the near-field target surface 400 and the far-field target surface 500.

[0087] It can be understood that each light source plate 710 in the multi-band optical system 700 to be adjusted comprises a lamp bead and a collimating mirror group arranged oppositely. The back of the lamp bead is fixed with the moving component 130 in the light source plate adjuster 100, the fixed component 140 in the light source plate adjuster 100 is fixed with the fixed table 800, and the front of the lamp bead is integrated with the collimating mirror group.

[0088] Optionally, referring to Figure 8 The embodiments of the present application also provide an optical coupling method, which is applied to the optical coupling device as described in any one of the preceding embodiments, and the method comprises the following steps.

[0089] Step S10: adjusting the position of the first light source board by using the light source board adjuster until the first offset and the second offset corresponding to the first light source board output by the monitoring module are both zero.

[0090] Specifically, first place the preassembled multi-band optical system to be calibrated on a mounting platform and secure it to the mounting platform with screws. Next, place the light source board adjuster onto the first light source board of the first optical path and secure it to the mounting platform with screws. The first light source board includes a first lamp bead (i.e., the light source of the first optical path) and a first collimator lens assembly positioned opposite each other.

[0091] After lighting the first lamp bead, fine-tune the first collimator lens assembly to position the first lamp bead on both the near-field and far-field target surfaces. Then, adjust the position of the first light source board using the light source board adjuster until the first and second offset values ​​corresponding to the first light source board output by the monitoring module are both zero. This indicates that the center of the first lamp bead image (i.e., the center of the main light spot) is aligned with the reference points on the near-field and far-field target surfaces, completing the first optical path calibration and fixing the position of the first light source board.

[0092] Step S20: adjusting the position of the dichroic mirror corresponding to the second light source panel by using the dichroic mirror adjuster until the auxiliary light spot formed by the second light source panel overlaps with the auxiliary light spot formed by the first light source panel.

[0093] Specifically, the light source board adjuster is placed on the second light source board of the second light path, and the light source board adjuster is fastened to the fixed platform with screws. After the dichroic mirror adjuster is moved to the top of the dichroic mirror corresponding to the second light source board through the X-axis and Y-axis coarse adjustment platforms, the X-axis movable connector and the Y-axis movable connector are locked. By adjusting the Z-axis adjustment platform, the X-axis fine adjustment platform, the Y-axis fine adjustment platform, the Z-axis rotation platform and the angle offset platform in the dichroic mirror adjuster, it is ensured that the clamp is aligned and clamped to the bracket of the dichroic mirror. The second light source board includes a second lamp bead (i.e., the light source of the second light path) and a second collimator group that are relatively arranged.

[0094] Light up the first and second lamps simultaneously. First, fine-tune the second collimator assembly so that the second lamp is imaged on both the near-field and far-field targets. Then, use the dichroic mirror adjuster to adjust the position of the dichroic mirror corresponding to the second light source board until the secondary light spot formed by the second light source board overlaps with the secondary light spot formed by the first light source board.

[0095] Step S30: adjusting the position of the second light source board by using the light source board adjuster until the first offset and the second offset corresponding to the second light source board output by the monitoring module are both zero.

[0096] Specifically, the position of the second light source plate is adjusted by the light source plate adjuster until the first offset and the second offset corresponding to the second light source plate output by the monitoring module are both zero, indicating that the light bead image center (i.e., the main light spot center) of the second light bead has been aligned with the reference points on the near-field target surface and the far-field target surface, and the second optical path correction is completed.

[0097] Step S40: return to execute the step of adjusting the position of the dichroic mirror corresponding to the second light source plate by the dichroic mirror adjuster until all the light source plates and dichroic mirrors in the multi-band optical system to be adjusted are completed.

[0098] If the number of light source plates in the multi-band optical system to be adjusted is greater than two, the remaining light source plates are sequentially adjusted in the manner of adjusting the second light source plate until all the light source plates and dichroic mirrors in the multi-band optical system to be adjusted are completed optical coupling adjustment, thereby ensuring that each wave optical path in the multi-band optical system to be adjusted is coaxial.

[0099] In summary, the embodiment of the present application provides an optical coupling device and method, which comprises a light source plate adjuster, a dichroic mirror adjuster, a beam splitter, a near-field target surface, a far-field target surface, a monitoring module and a multi-band optical system to be adjusted. The beam splitter is arranged at the light outlet of the multi-band optical system to be adjusted, and is used to divide the outgoing light of the multi-band optical system to be adjusted into a first light beam transmitted along the X-axis direction and a second light beam transmitted along the Y-axis direction. The near-field target surface is arranged in front of the beam splitter along the X-axis direction, and the far-field target surface is arranged in front of the beam splitter along the Y-axis direction. The distance between the far-field target surface and the beam splitter is greater than the distance between the near-field target surface and the beam splitter.

[0100] The monitoring module can monitor the near-field target surface and the far-field target surface in real time and output the first offset and the second offset, so that the position of the main light spot center can be continuously and quickly observed without manual conversion of the target surface distance or manual measurement of the main light spot offset. The positions of the optical devices can be accurately adjusted by the dichroic mirror adjuster and the light source plate adjuster, thereby improving the optical coupling precision and quality, and the optical coupling can be repeatedly performed to improve the coupling efficiency and consistency.

[0101] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0102] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics thereof. The embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference herein to any prior art is to be taken as an admission that the application is not entitled to antedate such prior art by virtue of prior application. Any reference to the use of a term in the singular herein shall be understood in the context to describe a particular example or embodiment of the application and should not be construed as limiting the scope of the application to that particular example or embodiment. Any reference to use of terms in the plural herein shall be understood as describing a particular example or embodiment of the application and should not be construed as limiting the scope of the application to that particular example or embodiment.

Claims

1. An optical coupling device, characterized in that: include: Light source board adjuster, dichroic mirror adjuster, beam splitter, near-field target surface, far-field target surface, monitoring module and multi-band optical system to be adjusted; The multi-band optical system to be calibrated comprises at least two light source boards and at least one dichroic mirror, wherein the at least two light source boards comprise a first light source board and at least one second light source board; wherein the number of the second light source boards is equal to the number of the dichroic mirrors; The beam splitter is arranged at the light outlet of the multi-band optical system to be calibrated, and is used to split the output light of the multi-band optical system to be calibrated into a first light beam transmitted along the X-axis direction and a second light beam transmitted along the Y-axis direction; the near-field target surface is arranged in front of the beam splitter along the X-axis direction, and the far-field target surface is arranged in front of the beam splitter along the Y-axis direction; wherein the distance between the far-field target surface and the beam splitter is greater than the distance between the near-field target surface and the beam splitter; The monitoring module is used to monitor the near-field target surface and the far-field target surface to output a first offset and a second offset corresponding to each light source panel; wherein the first offset is the distance between the center point of the main spot of the first light beam irradiated on the near-field target surface and a reference point on the near-field target surface, and the second offset is the distance between the center point of the main spot of the second light beam irradiated on the far-field target surface and the reference point on the far-field target surface; The light source board adjuster is used to adjust the position of the first light source board until the first offset and the second offset corresponding to the first light source board output by the monitoring module are both zero; The dichroic mirror adjuster is used to adjust the position of the dichroic mirror corresponding to the second light source panel until the auxiliary light spot formed by the second light source panel coincides with the auxiliary light spot formed by the first light source panel; The light source board adjuster is further configured to adjust the position of the second light source board until the first offset and the second offset corresponding to the second light source board output by the monitoring module are both zero.

2. The optical coupling device according to claim 1, wherein: The optical coupling device further comprises a fixing platform, and the multi-band optical system to be adjusted, the light source board adjuster and the beam splitter are all mounted on the fixing platform.

3. The optical coupling device according to claim 2, wherein: The optical coupling device also includes an X-axis and Y-axis coarse adjustment platform; The fixed platform is arranged inside the X-axis and Y-axis coarse adjustment platform, the dichroic mirror adjuster is suspended on the inner top of the X-axis and Y-axis coarse adjustment platform, and the X-axis and Y-axis coarse adjustment platform is used to drive the dichroic mirror adjuster to move along the X-axis direction or the Y-axis direction.

4. The optical coupling device according to claim 3, wherein: The dichroic mirror adjuster includes: a Z-axis adjustment platform, an X-axis fine-tuning platform, a Y-axis fine-tuning platform, a Z-axis rotation platform, an angle offset platform and a clamper; The top of the Z-axis adjustment platform is connected to the inner top of the X-axis and Y-axis coarse adjustment platform, the Z-axis adjustment platform, the X-axis fine adjustment platform, the Y-axis fine adjustment platform, the Z-axis rotation platform and the angle offset platform are all connected to one end of the holder, and the other end of the holder is connected to the dichroic mirror; The dichroic mirror adjuster is used to translate the dichroic mirror along the Z-axis, X-axis, and Y-axis, rotate it around the Z-axis, and adjust the vertical angle deflection.

5. The optical coupling device according to claim 2, wherein: The monitoring module includes a first camera, a second camera and a processor; The first camera is mounted below the fixed platform near the beam splitter along the X-axis direction, and the first camera is arranged opposite to the near-field target surface; the second camera is mounted below the fixed platform near the beam splitter along the Y-axis direction, and the second camera is arranged opposite to the far-field target surface; the first camera and the second camera are both connected to the processor; The first camera is used to capture a first image formed by the first light beam irradiating the near-field target surface, and the second camera is used to capture a second image formed by the second light beam irradiating the far-field target surface; The processor is configured to output the first offset according to the first image, and the processor is further configured to output the second offset according to the second image.

6. The optical coupling device according to claim 2, wherein: The light source panel adjuster includes: a Z-axis fine-tuning component, a Y-axis fine-tuning component, a moving component and a fixed component; The Z-axis fine-tuning component and the Y-axis fine-tuning component are both arranged on the movable member, the movable member is mounted on the light source board to be adjusted, the fixed member is mounted on the fixed platform, and the movable member and the fixed member are vertically connected; The light source board adjuster is used to translate the light source board to be adjusted along the Z-axis and the Y-axis.

7. The optical coupling device according to claim 1, wherein: The first light source board includes a first lamp bead and a first collimating lens group that are arranged opposite to each other, and the second light source board includes a second lamp bead and a second collimating lens group that are arranged opposite to each other; The first collimating lens group is used to image the first lamp bead on the near-field target surface and the far-field target surface, and the second collimating lens group is used to image the second lamp bead on the near-field target surface and the far-field target surface.

8. An optical coupling method, characterized in that: Applied to the optical coupling device according to any one of claims 1 to 7, the optical coupling method comprises: Adjusting the position of the first light source board by the light source board adjuster until the first offset and the second offset corresponding to the first light source board output by the monitoring module are both zero; adjusting the position of the dichroic mirror corresponding to the second light source panel by the dichroic mirror adjuster until the auxiliary light spot formed by the second light source panel coincides with the auxiliary light spot formed by the first light source panel; Adjusting the position of the second light source board by the light source board adjuster until the first offset and the second offset corresponding to the second light source board output by the monitoring module are both zero; Return to the step of adjusting the position of the dichroic mirror corresponding to the second light source board by the dichroic mirror adjuster until all light source boards and dichroic mirrors in the multi-band optical system to be adjusted are adjusted.

9. The optical coupling method according to claim 8, characterized in that: The first light source panel includes a first lamp bead and a first collimating lens group that are arranged opposite to each other; Before the step of adjusting the position of the first light source panel by the light source panel adjuster, the optical coupling method further includes: After the first lamp bead is lit, the first collimating lens group is adjusted so that the first lamp bead is imaged on the near-field target surface and the far-field target surface.

10. The optical coupling method according to claim 9, characterized in that: The second light source board includes a second lamp bead and a second collimating lens group arranged opposite to each other; before the step of adjusting the position of the dichroic mirror corresponding to the second light source board by the dichroic mirror adjuster, the optical coupling method further includes: The first lamp bead and the second lamp bead are lit at the same time, and the second collimating lens group is adjusted so that the second lamp bead is imaged on the near-field target surface and the far-field target surface.

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