Optical coupling device and method

Abstract

The invention provides an optical coupling device and method, and relates to the technical field of optical coupling, and the device comprises a light source plate regulator, a dichroscope regulator, a spectroscope, a near-field target surface, a far-field target surface, a monitoring module, and a to-be-adjusted multiband optical system. The spectroscope is arranged at a light outlet of the to-be-adjusted multi-band optical system and is used for dividing emergent light of the to-be-adjusted multi-band optical system into a first light beam transmitted in the X-axis direction and a second light beam transmitted in the Y-axis direction. The near-field target surface is arranged in front of the spectroscope along the X-axis direction, and the far-field target surface is arranged in front of the spectroscope along the Y-axis direction. The near-field target surface and the remote target surface are monitored in real time through the monitoring module, the first offset and the second offset are output, the center position of the main light spot can be observed continuously and rapidly, and the offset of the main light spot does not need to be measured manually. And the position of the optical device can be accurately adjusted through the dichroscope 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 field of optical coupling technology, and in particular, to an optical coupling device and method. Background Art

[0002] Multi-band light sources are increasingly used in the fields of biomedical fluorescence detection, industrial detection equipment, etc. Multi-band light sources have at least two light sources, which are coupled together through devices such as dichroic mirrors. Therefore, it is necessary to adjust each optical path to combine the light beams together, ensure that the light output direction and position of each wave are consistent, and the optical paths of each wave are coaxial.

[0003] At present, many optical path coaxiality mainly relies on structural limit to initially locate, and then cooperates with manual debugging to complete the optical path coaxiality correction. However, relying on the manual debugging method, different people may have different adjustment effects, and the efficiency is low.

[0004] Therefore, how to improve the coupling accuracy and efficiency of multi-band light sources is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

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

[0006] In order to achieve the above purpose, the technical solution adopted in this application is as follows:

[0007] On the one hand, an embodiment of the present application provides an optical coupling device, including: a light source board 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 calibrated; the multi-band optical system to be calibrated includes at least two light source boards and at least one dichroic mirror, and the at least two light source boards include 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;

[0008] 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;

[0009] 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 a reference point on the far-field target surface;

[0010] 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;

[0011] The dichroic mirror adjuster is used to adjust the position of the dichroic mirror corresponding to the second light source board until the auxiliary light spot formed by the second light source board coincides with the auxiliary light spot formed by the first light source board;

[0012] The light source board adjuster is further used 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.

[0013] Furthermore, the optical coupling device also includes a fixing platform, and the multi-band optical system to be adjusted, the light source board adjuster and the beam splitter are all installed on the fixing platform.

[0014] Furthermore, 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 from 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.

[0015] Further, the dichroic mirror adjuster comprises: a Z-axis adjustment platform, an X-axis fine-tuning platform, a Y-axis fine-tuning platform, a platform for rotating around the Z-axis, an angle offset platform and a clamp;

[0016] 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;

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

[0018] Further, the monitoring module includes a first camera, a second camera and a processor; the first camera is installed below the fixed platform close to the spectroscope 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 platform close to the spectroscope 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;

[0019] 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;

[0020] 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.

[0021] Further, the light source panel adjuster includes: a Z-axis fine-tuning component, a Y-axis fine-tuning component, a moving component and a fixing component;

[0022] The Z-axis fine-tuning component and the Y-axis fine-tuning component are both arranged on the moving part, the moving part is mounted on the light source board to be adjusted, the fixing part is mounted on the fixing table, and the moving part and the fixing part are vertically connected;

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

[0024] Furthermore, the first light source board includes first lamp beads and a first collimator group that are arranged opposite to each other, and the second light source board includes second lamp beads and a second collimator group that are arranged opposite to each other;

[0025] 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.

[0026] On the other hand, an embodiment of the present application further provides an optical coupling method, which is applied to the optical coupling device as described in any of the above embodiments, and the optical coupling method includes:

[0027] 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;

[0028] adjusting the position of the dichroic mirror corresponding to the second light source board by the dichroic mirror adjuster until the auxiliary light spot formed by the second light source board overlaps with the auxiliary light spot formed by the first light source board;

[0029] 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;

[0030] 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 the light source boards and dichroic mirrors in the multi-band optical system to be adjusted are adjusted.

[0031] Furthermore, the first light source board includes a first lamp bead and a first collimator lens group that are arranged opposite to each other; before the step of adjusting the position of the first light source board by the light source board adjuster, the optical coupling method further includes:

[0032] After lighting the first lamp bead, the first collimating lens group is adjusted to allow the first lamp bead to be imaged on the near-field target surface and the far-field target surface.

[0033] Furthermore, the second light source board includes second lamp beads and a second collimator group that are 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:

[0034] The first lamp bead and the second lamp bead are lighted at the same time, and the second collimating lens group is adjusted to image the second lamp bead on the near-field target surface and the far-field target surface.

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

[0036] The present application provides an optical coupling device and method, the device comprising: a light source board 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 calibrated. The beam splitter is arranged at the light outlet of the multi-band optical system to be calibrated, and the beam splitter is used to divide 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. Among them, 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 board. Among them, the first offset is the distance between the center point of the main light spot irradiated by the first light beam 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 irradiated by the second light beam on the far-field target surface and the reference point on the far-field target surface.

[0037] The present application monitors the near-field target surface and the remote target surface in real time through the monitoring module and outputs the first offset and the second offset, and can continuously and quickly observe the center position of the main light spot without manually changing the target surface distance and manually measuring the main light spot offset. The position of the optical device (i.e., the dichroic mirror and the light source board) can be accurately adjusted through the dichroic mirror adjuster and the light source board adjuster, which not only improves the optical coupling accuracy and quality, but also improves the coupling efficiency and coupling consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians of the art without making creative work are within the scope of protection of the present application.

[0039] Figure 1 One of the structural schematic diagrams of an optical coupling device provided in an embodiment of the present application;

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

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

[0042] Figure 4 One of the structural schematic diagrams of a dichroic mirror adjuster provided in an embodiment of the present application;

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

[0044] Figure 6 One of the structural schematic diagrams of a light source panel regulator provided in an embodiment of the present application;

[0045] Figure 7 A second structural schematic diagram of a light source panel regulator provided in an embodiment of the present application;

[0046] Figure 8 A schematic flow chart of an optical coupling method provided in an embodiment of the present application.

[0047] Icons: 10-optical coupling device; 100-light source board adjuster; 110-Z-axis fine-tuning component; 120-Y-axis fine-tuning component; 130-moving part; 140-fixed part; 200-dichroic mirror adjuster; 210-Z-axis adjustment platform; 220-X-axis fine-tuning platform; 230-Y-axis fine-tuning platform; 240-rotating platform around Z-axis; 250-angle offset platform; 260-clamp; 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 calibrated; 710-light source board; 711-first light source board; 712-second light source board; 713-third light source board; 714-fourth light source board; 715-fifth light source board; 716-sixth light source board; 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 and Y-axis coarse adjustment platform; 910-X-axis movable connector; 920-Y-axis movable connector. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the 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 making creative work belong to the scope of protection of the present application.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the description of this application, it should be noted that relational terms such as first and second, etc. 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 these entities or operations. The term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium.

[0051] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0052] As mentioned in the background technology, the current method for calibrating multi-band light sources mainly relies on structural limit to perform preliminary positioning, and then cooperates with manual debugging to complete the coaxiality correction of the optical path. However, this method has the problems of low coupling accuracy and low coupling efficiency.

[0053] In view of this, please refer to Figures 1 to 3 An embodiment of the present application provides an optical coupling device 10, including: a light source board 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 700 to be calibrated.

[0054] The multi-band optical system 700 to be calibrated includes: at least two light source boards 710 and at least one dichroic mirror 720. The at least two light source boards 710 include: a first light source board and at least one second light source board. The number of the second light source boards is equal to the number of the dichroic mirrors 720.

[0055] That is, the number of dichroic mirrors 720 in the multi-band optical system 700 to be calibrated is one less than the number of light source panels 710. Figure 3 As shown, the multi-band optical system 700 to be calibrated includes a first light source board 711, a second light source board 712, a third light source board 713, a fourth light source board 714, a fifth light source board 715, a sixth light source board 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 beam emitted by each light source panel 710 is reflected or transmitted by the dichroic mirror 720 as output light, and then emitted from the light outlet of the multi-band optical system 700 to be adjusted.

[0057] The beam splitter 300 is disposed at the light outlet of the multi-band optical system 700 to be adjusted, and is used to split the output light of the multi-band optical system 700 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.

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

[0059] Optionally, the distance between the far-field target surface 500 and the beam splitter 300 may be 200 cm, and the distance between the near-field target surface 400 and the beam splitter 300 may be 50 cm. In addition, reference points are pre-marked on both 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, thereby outputting the first offset and the second offset corresponding to each light source board 710. The first offset is the distance between the center point of the main light spot irradiated by the first light beam 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 light spot irradiated by the second light beam on the far-field target surface 500 and the reference point on the far-field target surface 500.

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

[0062] In an embodiment of the present application, when the first offset and the second offset corresponding to the first light source board 711 output by the monitoring module 600 are both zero, it means that the center points of the main light spots of the first light beam and the second light beam generated by the light beam emitted by the first light source board 711 after the action of 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, thereby completing the first optical correction.

[0063] The dichroic mirror adjuster 200 is used to adjust the position of the dichroic mirror 720 corresponding to the second light source board 712 until the auxiliary light spot formed by the second light source board 712 overlaps with the auxiliary light spot formed by the first light source board 711 .

[0064] It can be understood that the light spot formed by the light beam irradiating the target surface includes a main light spot and a subsidiary light spot surrounding the main light spot.

[0065] The light source panel adjuster 100 is further used to adjust the position of the second light source panel 712 until the first offset and the second offset corresponding to the second light source panel 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 board 712 output by the monitoring module 600 are both zero, it means that the main spot centers of the first light beam and the second light beam generated by the light beam emitted by the second light source board 712 after the beam splitter 300 are respectively aligned with the reference points on the near-field target surface 400 and the far-field target surface 500, thereby completing the second optical calibration. In this way, it can be ensured that the light beam emitted by the first light source board 711 and the light beam emitted by the second light source board 712 are coaxial and coupled together at the light outlet of the multi-band optical system 700 to be calibrated.

[0067] If the multi-band optical system 700 to be calibrated further includes a third light source board 713, a fourth light source board 714, etc., the position of the dichroic mirror 720 (i.e., the dichroic mirror to be calibrated) corresponding to the light source board 710 (i.e., the light source board to be calibrated) can be adjusted by the dichroic mirror adjuster 200 in the same manner, and then the position of the light source board 710 can be adjusted by the light source board adjuster 100 until the first offset and the second offset corresponding to the light source board 710 output by the monitoring module 600 are both zero. Repeat this step until all the light source boards 710 and the dichroic mirrors 720 in the multi-band optical system 700 to be calibrated have completed the coupling adjustment.

[0068] Based on the above design, the present application uses a machine vision solution to locate and adjust components to achieve automated optical coupling. Specifically, by real-time monitoring of the near-field target surface 400 and the far-field target surface 500 by the monitoring module 600 and outputting the first offset and the second offset, the center position of the main light spot can be observed continuously and quickly without the need to manually change the target surface distance or manually measure the main light spot offset. The position of the optical device can be accurately adjusted by the dichroic mirror adjuster 200 and the light source board adjuster 100, thereby improving the accuracy and quality of optical coupling, and optical coupling can be repeated to improve coupling efficiency and coupling consistency.

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

[0070] Furthermore, if Figure 2 and Figure 3 As shown, the monitoring module 600 includes: a first camera 610, a second camera 620 and a processor (not shown in the figure). Among them, the first camera 610 is installed below the fixed platform 800 close to the spectroscope 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 installed below the fixed platform 800 close to the spectroscope 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 both connected to the processor.

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

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

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

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

[0075] In an alternative implementation, please refer again to Figure 1 The optical coupling device 10 further includes an X-axis Y-axis coarse adjustment platform 900 . The fixing platform 800 is disposed inside the X-axis Y-axis coarse adjustment platform 900 , and the dichroic mirror adjuster 200 is suspended from the inner top of the X-axis Y-axis coarse adjustment platform 900 .

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

[0077] The X-axis and Y-axis 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 move to the top of any dichroic mirror 720, thereby clamping the dichroic mirror 720 and adjusting its position.

[0078] For further information, see Figure 4 and Figure 5 , the dichroic mirror adjuster 200 includes: 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 holder 260. The top of the Z-axis adjustment platform 210 is connected to the inner top of the X-axis and Y-axis 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 all connected to one end of the holder 260, and the other end of the holder 260 is connected to the dichroic mirror 720.

[0079] The dichroic mirror adjuster 200 is used to translate the dichroic mirror 720 along the Z-axis, X-axis, and Y-axis directions, rotate it around the Z-axis direction, and adjust the vertical angle.

[0080] For further information, see Figure 6 and Figure 7 The light source panel adjuster 100 includes: a Z-axis fine-tuning component 110, a Y-axis fine-tuning component 120, a moving component 130 and a fixing component 140. The Z-axis fine-tuning component 110 and the Y-axis fine-tuning component 120 are both arranged on the moving component 130. The moving component 130 is installed on the light source panel 710 to be adjusted, and the fixing component 140 is installed on the fixing platform 800, and the moving component 130 and the fixing component 140 are vertically connected.

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

[0082] It should be noted that the number of the light source panel adjusters 100 can be set according to actual needs, and the embodiment of the present application does not limit the number of the light source panel adjusters 100.

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

[0084] For another example, in order to improve the optical path coupling efficiency, the number of light source board adjusters 100 may be equal to the number of light source boards 710, that is, one light source board adjuster 100 is installed on each light source board 710, thereby avoiding the step of “removing and reinstalling”.

[0085] In addition, in the embodiment of the present application, the first light source board 711 includes first lamp beads and a first collimator group that are arranged opposite to each other, and the second light source board 712 includes second lamp beads and a second collimator group that are arranged opposite to each other.

[0086] The first collimating lens 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 lens 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 board 710 in the multi-band optical system 700 to be adjusted includes a lamp bead and a collimator group arranged relatively. The back of the lamp bead is fixed to the moving part 130 in the light source board adjuster 100, the fixing part 140 in the light source board adjuster 100 is fixed to the fixing platform 800, and the front of the lamp bead is integrated with the collimator group.

[0088] Optionally, see Figure 8 An embodiment of the present application also provides an optical coupling method, which is applied to the optical coupling device as described in any of the aforementioned implementations, and the method includes the following steps.

[0089] Step S10: 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.

[0090] Specifically, firstly, the pre-assembled multi-band optical system to be adjusted is placed on a fixing table, and the multi-band optical system to be adjusted is fastened to the fixing table with screws. Then, the light source board adjuster is placed behind the first light source board of the first light path, and the light source board adjuster is fastened to the fixing table with screws. Among them, the first light source board includes a first lamp bead (i.e., the light source of the first light path) and a first collimator lens group that are arranged oppositely.

[0091] After lighting the first lamp bead, fine-tune the first collimator lens group to image the first lamp bead on the near-field target surface and the far-field target surface. Then adjust the position of the first light source board through 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, indicating that the center of the lamp bead image of the first lamp bead (i.e., the center of the main light spot) has been aligned with the reference point on the near-field target surface and the reference point on the far-field target surface, completing the first optical path correction 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 means of 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, after the light source board regulator is sleeved on the second light source board of the second light path, the light source board regulator is fastened to the fixed platform with screws. After the dichroic mirror regulator is moved to the top of the dichroic mirror corresponding to the second light source board through the X-axis Y-axis coarse adjustment platform, 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 platform rotating around the Z-axis and the angle offset platform in the dichroic mirror regulator, it is ensured that the clamp is aligned and clamped to the bracket of the dichroic mirror. Wherein, 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 lamp bead and the second lamp bead at the same time, first fine-tune the second collimator group to image the second lamp bead on the near-field target surface and the far-field target surface. Then adjust the position of the dichroic mirror corresponding to the second light source board through the dichroic mirror adjuster until the secondary light spot formed by the second light source board coincides 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 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 board is adjusted 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, indicating that the center of the lamp bead image of the second lamp bead (i.e., the center of the main light spot) has been aligned with the reference point on the near-field target surface and the reference point on the far-field target surface, completing the second optical path correction.

[0097] Step S40: 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 the light source boards and dichroic mirrors in the multi-band optical system to be adjusted are adjusted.

[0098] If the number of light source boards in the multi-band optical system to be calibrated is greater than two, the remaining light source boards are calibrated in turn in the same manner as the second light source board until all light source boards and dichroic mirrors in the multi-band optical system to be calibrated complete the optical coupling calibration, thereby ensuring that the wave light paths in the multi-band optical system to be calibrated are coaxial.

[0099] In summary, the embodiments of the present application provide an optical coupling device and method, wherein the optical coupling device includes: a light source board adjuster, a dichroic mirror adjuster, a beam splitter, a near-field target surface, a far-field target surface, a monitoring module, and an optical system to be calibrated. The beam splitter is disposed at the light outlet of the multi-band optical system to be calibrated, and the beam splitter is used to divide 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 disposed in front of the beam splitter along the X-axis direction, and the far-field target surface is disposed in front of the beam splitter along the Y-axis direction. Among them, 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 monitors the near-field target surface and the remote target surface in real time and outputs the first offset and the second offset, which can continuously and quickly observe the center position of the main light spot without manually changing the target surface distance or manually measuring the main light spot offset. The position of the optical device can be accurately adjusted by the dichroic mirror adjuster and the light source board adjuster, thereby improving the optical coupling accuracy and quality, and optical coupling can be repeated to improve coupling efficiency and coupling consistency.

[0101] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle 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 present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

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 a 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 board until the auxiliary light spot formed by the second light source board coincides with the auxiliary light spot formed by the first light source board; The light source board adjuster is further used 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, characterized in that: The optical coupling device also includes a fixing platform, and the multi-band optical system to be adjusted, the light source board adjuster and the beam splitter are all installed on the fixing platform.

3. The optical coupling device according to claim 2, characterized in that: 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, characterized in that: The dichroic mirror adjuster comprises: 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 clamp; 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 directions, rotate it around the Z-axis direction, and adjust the vertical angle deflection.

5. The optical coupling device according to claim 2, characterized in that: The monitoring module includes a first camera, a second camera and a processor; The first camera is installed below the fixed platform 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 platform 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 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, characterized in that: The light source panel adjuster comprises: a Z-axis fine-tuning component, a Y-axis fine-tuning component, a moving component and a fixing component; The Z-axis fine-tuning component and the Y-axis fine-tuning component are both arranged on the moving part, the moving part is mounted on the light source board to be adjusted, the fixing part is mounted on the fixing table, and the moving part and the fixing part 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 directions.

7. The optical coupling device according to claim 1, characterized in that: The first light source board includes first lamp beads and a first collimator group that are arranged opposite to each other, and the second light source board includes second lamp beads and a second collimator 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 board by the dichroic mirror adjuster until the auxiliary light spot formed by the second light source board overlaps with the auxiliary light spot formed by the first light source board; 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 the 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 comprises a first lamp bead and a first collimating lens group which are arranged opposite to each other; Before the step of adjusting the position of the first light source board by the light source board adjuster, the optical coupling method further includes: After lighting the first lamp bead, the first collimating lens group is adjusted to allow the first lamp bead to be 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 collimator group that are 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 lighted at the same time, and the second collimating lens group is adjusted to image the second lamp bead on the near-field target surface and the far-field target surface.

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