Optical device alignment system and method

Abstract

The application discloses an optical device adjusting system and method. The adjusting system comprises a light splitting module and a plurality of detection modules. The light splitting module is used for splitting light emitted by the optical device into a plurality of light paths. The plurality of detection modules are arranged on the plurality of light paths and detect light of the corresponding light paths. The optical paths of light of each light path from the optical device to the corresponding detection module are different. The adjusting system provided by the application can simultaneously detect a plurality of focusing distances of the optical device, and the plurality of focusing distances do not need to be repeatedly adjusted, so that the adjusting efficiency and the adjusting precision are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical technology, in particular to an optical device assembling and adjusting system and method. BACKGROUND

[0002] For an optical transceiver device, the assembling and adjusting of the transmitter device and the receiver device is a difficulty and bottleneck in the production process. In the assembling and adjusting process of the transmitter device and the receiver device, due to the consideration of the optical path design characteristics of the optical device, multiple focusing distances of the optical device need to be adjusted, for example, the first focusing distance of the optical device is adjusted first, and then the second focusing distance, the third focusing distance and other focusing distances are adjusted in turn. However, there is a coupling relationship between different focusing distances of the optical device, and multiple iterations are required for adjusting different focusing distances, which will lead to a complex assembling and adjusting process of the optical device, and low precision and poor consistency of the assembling and adjusting. SUMMARY

[0003] Embodiments of the present application provide an optical device assembling and adjusting system and method which can at least partially solve at least one of the above-mentioned or other shortcomings in the prior art.

[0004] The first aspect of the present application provides an optical device assembling and adjusting system, which comprises a light splitting module and a plurality of detection modules, the light splitting module is used for splitting the light emitted by the optical device into a plurality of light paths; the plurality of detection modules are arranged on the plurality of light paths and detect the light of the corresponding light path, wherein the light of each light path propagates to the corresponding detection module with different optical paths.

[0005] According to an example embodiment of the present application, the light splitting module comprises n light splitting elements arranged along the optical axis and forms n+1 light paths, n≥1.

[0006] According to an example embodiment of the present application, the plurality of light paths comprises a first light path and a second light path parallel to the optical axis, and the plurality of detection modules comprises a first detection module corresponding to the first light path and a second detection module corresponding to the second light path.

[0007] According to an example embodiment of the present application, the assembling and adjusting system further comprises a focusing lens, the focusing lens is located on the second light path and is arranged between the light splitting element corresponding to the second light path and the second detection module.

[0008] According to an example embodiment of the present application, the effective aperture of the light splitting element satisfies: 1≤ wherein L1 is the distance of the light splitting element from the optical device in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, and d maxD is a maximum decentration value of the optical device.

[0009] According to an example embodiment of the present application, an effective aperture Φ1 of the first detection module satisfies: 1≤Φ1 / (l1×tanθ max +d max +D)≤5, where l1 is an optical path of the first light path, θ max is a maximum tilt angle of the optical device, d max is a maximum decentration value of the optical device, and D is a spot size of the optical device.

[0010] According to an example embodiment of the present application, an effective aperture Φ2 of the second detection module satisfies: 1≤Φ2 / (l2×tanθ max +d max +D)≤5, where l2 is an optical path of the second light path, θ max is a maximum tilt angle of the optical device, d max is a maximum decentration value of the optical device, and D is a spot size of the optical device.

[0011] According to an example embodiment of the present application, an effective aperture Φ2 of the second detection module satisfies: 1≤Φ2 / (F×tanθ max )≤5, where F is a focal length of the focusing lens, and θ max is a maximum tilt angle of the optical device.

[0012] According to an example embodiment of the present application, an effective aperture of the focusing lens satisfies: where L2 is a distance between the focusing lens and the optical device in a direction parallel to the optical axis, θ max is a maximum tilt angle of the optical device, d max is a maximum decentration value of the optical device, and D is a spot size of the optical device.

[0013] According to an example embodiment of the present application, a decentration value d1 of the optical device satisfies: d1=△h1-l1×tanθ, where θ is a tilt angle of the optical device, △h1 is a position offset of light of the first light path at the first detection module, and l1 is an optical path of the first light path.

[0014] According to an example embodiment of the present application, a decentration value d2 of the optical device satisfies: d2=△h2-l2×tanθ, where θ is a tilt angle of the optical device, △h2 is a position offset of light of the second light path at the second detection module, and l2 is an optical path of the second light path.

[0015] According to an example embodiment of the present application, the eccentricity d2 of the optical device satisfies: d2=L2*tanθ, where θ=arctan(△h2 / F), and where θ is the tilt angle of the optical device, △h2 is the position offset of the light of the second light path at the second detection module, F is the focal length of the focusing lens, and L2 is the distance from the focusing lens to the optical device in a direction parallel to the optical axis.

[0016] According to an example embodiment of the present application, the alignment system satisfies: 0.2≤L1 / l1≤0.8, where L1 is the distance from the light splitting element to the optical device in a direction parallel to the optical axis, and l1 is the optical path length of the first light path.

[0017] According to an example embodiment of the present application, the alignment system satisfies: L2>L 12 +(L 12 ×tanθ max +d max +D) / 2, where L2 is the distance from the focusing lens to the optical device in a direction parallel to the optical axis, L 12 is the distance from the light splitting element corresponding to the second light path to the optical device in a direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

[0018] According to an example embodiment of the present application, the optical device includes a transmitting device, and the alignment system satisfies: F*tanθ Tx / A≥2, where F is the focal length of the focusing lens, θ Tx is the preset alignment accuracy of the transmitting device, and A is the preset resolution of the second detection module.

[0019] According to an example embodiment of the present application, the optical device includes an analog device configured as a device designed based on a receiving device and similar to a transmitting device, and the alignment system satisfies: ((F / f)*F*tanθ Rx ) / A≥2, where F is the focal length of the focusing lens, f is the focal length of the receiving device, θ Rx is the preset alignment accuracy of the receiving device, and A is the preset resolution of the second detection module.

[0020] According to an example embodiment of the present application, the optical device includes a transmitting device and an analog device configured as a device designed based on a receiving device and similar to the transmitting device, and the alignment system satisfies: F*tanθ Tx / A≥2, and ((F / f)*F*tanθ Rx) / A≥2, where F is the focal length of the focusing lens, f is the focal length of the receiving device, θ Tx is the preset installation accuracy of the transmitting device, θ Rx is the preset installation accuracy of the receiving device, and A is the preset resolution of the second detection module.

[0021] According to an example embodiment of the present application, the number of the light splitting modules is multiple, the multiple light splitting modules are arranged on multiple beam field angle light rays of the optical device, and each light splitting module splits the corresponding beam field angle light ray into multiple light paths.

[0022] According to an example embodiment of the present application, the light is near-infrared light, and the detection module comprises a near-infrared response element, a diffuse film and a visible light camera element, the near-infrared response element is used to convert the near-infrared light into visible light, the diffuse film is arranged on the side of the near-infrared response element away from the light splitting module and diffusely reflects the visible light, and the visible light camera element is arranged on the side of the diffuse film away from the near-infrared response element.

[0023] According to an example embodiment of the present application, the thickness K of the diffuse film satisfies: K / λ=10-500, where λ is the wavelength of the light.

[0024] The second aspect of the present application provides an installation method of an optical device, which comprises: arranging a light splitting module on the light emitting path of the optical device, the light splitting module splits the light emitted by the optical device into multiple light paths; and arranging a detection module on each light path, the detection module detects the light of the corresponding light path, wherein the optical path of the light of each light path from the optical device to the corresponding detection module is different.

[0025] According to an example embodiment of the present application, arranging the light splitting module on the light emitting path of the optical device comprises: arranging n light splitting elements on the light emitting path of the optical device along the optical axis, so that the light forms n+1 light paths after passing through the light splitting module, n≥1.

[0026] According to an example embodiment of the present application, arranging the light splitting module on the light emitting path of the optical device comprises: arranging multiple light splitting modules on the light emitting path of the optical device, the multiple light splitting modules are arranged on multiple beam field angle light rays of the optical device, and each light splitting module splits the corresponding beam field angle light ray into multiple light paths.

[0027] According to an example embodiment of the present application, the multiple light paths comprise a first light path and a second light path parallel to the optical axis, and the multiple detection modules comprise a first detection module corresponding to the first light path and a second detection module corresponding to the second light path.

[0028] According to an example embodiment of the present application, the alignment method further comprises: disposing a focusing lens on the second light path, wherein the focusing lens is located between the light splitting element corresponding to the second light path and the second detection module.

[0029] According to an example embodiment of the present application, the alignment method further comprises: determining the tilt angle of the optical device according to the position offset of the light of the second light path at the second detection module, the tilt angle θ of the optical device satisfying: θ = arctan(△h2 / F), wherein △h2 is the position offset of the light of the second light path at the second detection module, and F is the focal length of the focusing lens; determining the first eccentricity value of the optical device according to the tilt angle of the optical device and the position offset of the light of the first light path at the first detection module, the first eccentricity value d1 of the optical device satisfying: d1 = △h1-l1×tanθ, wherein △h1 is the position offset of the light of the first light path at the first detection module, and l1 is the optical path length of the first light path; and aligning the optical device based on the tilt angle and the first eccentricity value of the optical device.

[0030] According to an example embodiment of the present application, the aligning the optical device based on the tilt angle and the first eccentricity value of the optical device comprises: aligning the optical device based on the tilt angle of the optical device; aligning the optical device based on the first eccentricity value of the optical device; and obtaining the second eccentricity value of the optical device after the secondary alignment, and determining whether the second eccentricity value of the optical device after the secondary alignment is within a preset range, wherein the second eccentricity value d2’ of the optical device after the secondary alignment satisfies: d2’ = L2×tanθ’, wherein θ’ = arctan(△h2’ / F), θ’ is the tilt angle of the optical device after the secondary alignment, △h2’ is the position offset of the light of the second light path at the second detection module in the optical device after the secondary alignment, F is the focal length of the focusing lens, and L2 is the distance between the focusing lens and the optical device in a direction parallel to the optical axis.

[0031] According to an example embodiment of the present application, the aligning the optical device based on the tilt angle of the optical device comprises: dividing the detection target surface of the second detection module into a plurality of regions according to the aberration of the focusing lens, different regions having different angle compensation amounts; determining the angle compensation amount of the optical device according to the imaging point coordinates of the light of the second light path at the second detection module; and aligning the optical device based on the angle compensation amount and the tilt angle of the optical device.

[0032] According to an example embodiment of the present application, the alignment method further comprises: determining the eccentricity value and the tilt angle of the optical device according to the position offset of the light of the first light path at the first detection module and the position offset of the light of the second light path at the second detection module; and aligning the optical device based on the tilt angle and the eccentricity value of the optical device.

[0033] According to an exemplary embodiment of the present application, the effective aperture of the light splitting element is satisfy: Where L1 is the distance between the beam splitter and the optical device in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

[0034] According to an exemplary embodiment of the present application, the effective aperture Φ1 of the first detection module satisfies: 1≤Φ1 / (l1×tanθ max +d max +D)≤5, where l1 is the optical path of the first optical path, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

[0035] According to an exemplary embodiment of the present application, the effective aperture Φ2 of the second detection module satisfies: 1≤Φ2 / (l2×tanθ max +d max +D)≤5, where l2 is the optical path of the second optical path, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

[0036] According to an exemplary embodiment of the present application, the effective aperture Φ2 of the second detection module satisfies: 1≤Φ2 / (F×tanθ max )≤5, where F is the focal length of the focusing lens, θ max is the maximum tilt angle of the optical device.

[0037] According to an exemplary embodiment of the present application, the effective aperture of the focusing lens is satisfy: Where L2 is the distance between the focusing lens and the optical device in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

[0038] According to an exemplary embodiment of the present application, the installation method also includes: adjusting the position of the spectrometer element, and making the spectrometer element satisfy: 0.2≤L1 / l1≤0.8, wherein L1 is the distance between the spectrometer element and the optical device in a direction parallel to the optical axis, and l1 is the optical path of the first optical path.

[0039] According to an example embodiment of the present application, the adjusting method further comprises adjusting the position of the focusing lens, and making the focusing lens satisfy: L2>L 12 +(L 12 ×tanθ max +d max +D) / 2, wherein L2 is the distance between the focusing lens and the optical device in the direction parallel to the optical axis, L 12 is the distance between the light splitting element corresponding to the second light path and the optical device in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

[0040] According to an example embodiment of the present application, the optical device comprises a transmitting device, and the focal length F of the focusing lens satisfies: F×tanθ Tx / A≥2, wherein θ Tx is the preset adjustment accuracy of the transmitting device, and A is the preset resolution of the second detection module.

[0041] According to an example embodiment of the present application, the optical device comprises an analog device, the analog device is configured to be designed based on a receiving device and similar to the transmitting device, and the focal length F of the focusing lens satisfies: ((F / f)×F×tanθ Rx ) / A≥2, wherein f is the focal length of the receiving device, θ Rx is the preset adjustment accuracy of the receiving device, and A is the preset resolution of the second detection module.

[0042] According to an example embodiment of the present application, the optical device comprises a transmitting device and an analog device, the analog device is configured to be designed based on a receiving device and similar to the transmitting device, and the focal length F of the focusing lens satisfies: F×tanθ Tx / A≥2, and ((F / f)×F×tanθ Rx ) / A≥2, wherein f is the focal length of the receiving device, θ Tx is the preset adjustment accuracy of the transmitting device, θ Rx is the preset adjustment accuracy of the receiving device, and A is the preset resolution of the second detection module.

[0043] According to an example embodiment of the present application, the light is near-infrared light, and the detection module arranged on each light path comprises: a near-infrared responsive element, a diffuse film and a visible light camera element arranged in sequence on each light path, wherein the near-infrared responsive element converts the near-infrared light into visible light, and the diffuse film diffusely reflects the visible light.

[0044] According to an example embodiment of the present application, the thickness K of the diffusive permeable membrane satisfies: K / λ=10-500, wherein λ is the wavelength of the light.

[0045] The alignment system of the optical device provided by the present application comprises a light splitting module and a plurality of detection modules. The light splitting module can split the light emitted by the optical device into a plurality of light paths. Each light path corresponds to a detection module. The light paths have different optical paths from the optical device to the corresponding detection modules. The alignment system can simultaneously detect a plurality of focus distances of the optical device without repeatedly aligning the plurality of focus distances, thereby improving the alignment efficiency and alignment accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0046] Other features, objects and advantages of the embodiments of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings. In the drawings:

[0047] Figure 1 FIG. 1 is a structural schematic diagram of an alignment system of an optical device according to an embodiment of the present application;

[0048] Figure 2 FIG. 2 is a structural schematic diagram of an alignment system of an optical device according to an embodiment of the present application;

[0049] Figure 3 FIG. 3 is a light path schematic diagram of a finite distance detection of an optical device according to an embodiment of the present application;

[0050] Figure 4 FIG. 4 is a light path schematic diagram of an infinite distance detection of an optical device according to an embodiment of the present application;

[0051] Figure 5 FIG. 5 is a normalized light path coordinate system according to an embodiment of the present application;

[0052] Figure 6 FIG. 6 is an imaging point schematic diagram of light at a finite distance according to an embodiment of the present application;

[0053] Figure 7 FIG. 7 is an imaging point schematic diagram of light at an infinite distance according to an embodiment of the present application;

[0054] Figure 8 FIG. 8 is a detection target surface schematic diagram of a second detection module according to an embodiment of the present application;

[0055] Figure 9 FIG. 9 is a structural schematic diagram of a detection module according to an embodiment of the present application;

[0056] Figure 10 FIG. 10 is a structural schematic diagram of an alignment system of an optical device according to an embodiment of the present application;

[0057] Figure 11 A structural schematic diagram of an alignment system of an optical device according to an embodiment of the present application;

[0058] Figure 12 A schematic diagram of an optical path for aligning a simulation device by using an alignment system according to an embodiment of the present application;

[0059] Figure 13 A corresponding schematic diagram of a light source element and a receiving end detector according to an embodiment of the present application;

[0060] Figure 14 A corresponding schematic diagram of a light source element and a receiving end detector according to an embodiment of the present application;

[0061] Figure 15 A corresponding schematic diagram of a light source element and a receiving end detector according to an embodiment of the present application; and

[0062] Figure 16 A flow schematic diagram of an alignment method of an optical device according to an embodiment of the present application. DETAILED DESCRIPTION

[0063] For a better understanding of the present application, various aspects of the present application will be described in greater detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely exemplary of the application and is not intended to limit the scope of the application in any way. Throughout the specification, like reference numerals refer to like elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0064] It should be noted that the terms first, second, etc. are used herein only to distinguish one element from another, and do not imply any limitation on the elements. Thus, a first optical path discussed below can be termed a second optical path without departing from the teachings of the present application.

[0065] In the drawings, the thicknesses of the components, the sizes, and the shapes can have been exaggerated slightly for the sake of convenience in explanation. The drawings are merely schematic and are not strictly to scale.

[0066] It should also be understood that the terms "comprise", "comprising", "have", "having", "include", "including", "contain", "containing", "provide", "provided", "provide for", "provided for", and / or "configure" when used in this specification, refer to presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. In addition, the term "exemplary" is intended to mean an example or illustration.

[0067] Unless otherwise defined, all terms (including technical and scientific terms) used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined in the present application.

[0068] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0069] When assembling optical devices such as transmitting devices and receiving devices, considering the optical path design characteristics of the optical devices, multiple focusing distances and / or multiple field angles of the optical devices need to be assembled. Through the conventional assembly system, only a single focusing distance and / or a single field angle can be assembled, and after the assembly of the focusing distance and / or the field angle is completed, other focusing distances and / or other field angles can be sequentially assembled.

[0070] However, there is a coupling relationship between different focusing distances or different field angles of the optical devices, and after the assembly of a certain focusing distance or a certain field angle is completed, the assembly of other focusing distances or other field angles needs to be confirmed. If the assembly of other focusing distances or other field angles does not meet the requirements, the focusing distance or the field angle that does not meet the requirements needs to be reassembled, which will lead to a relatively complex entire assembly process of the optical devices, and repeated assembly of different focusing distances or different field angles will affect the assembly efficiency of the optical devices. In addition, the assembly precision of the optical devices is also low when using the above assembly system.

[0071] In order to at least partially solve one or more of the above problems and other potential problems, the first aspect of the present application proposes an assembly system of an optical device, specifically, proposes an assembly system of an optical device which can simultaneously detect multiple focusing distances of the optical device, or proposes an assembly system of an optical device which can simultaneously detect multiple focusing distances and multiple field angles of the optical device.

[0072] Figure 1 And Figure 2Structural diagrams of an alignment system 100 of an optical device according to an example embodiment of the present application are shown respectively. The optical device 130 can be, for example, a transmitter device and / or an analog device designed based on a receiver device and similar to the transmitter device, which can be, for example, a transmitting end of a laser radar system, and the receiver device can be, for example, a receiving end of the laser radar system. It should be understood that the optical device 130 can also be other devices, which are not specifically limited in the present application.

[0073] Reference is made to Figure 1 and Figure 2 The alignment system 100 includes a light splitting module 110 and a plurality of detection modules 120. The light splitting module 110 is configured to split the light emitted by the optical device 130 into a plurality of light paths. The plurality of detection modules 120 are arranged on the plurality of light paths respectively and configured to detect the light of the corresponding light path, in other words, one detection module 120 is arranged on each light path. The optical path of each light path is different. The optical device 130 can include at least one of a transmitter device and an analog device designed based on a receiver device and similar to the transmitter device.

[0074] The light emitted by the optical device 130 can be split into a plurality of light paths by the light splitting module 110, one detection module 120 is arranged on each light path, and the optical path of each light path is different. Based on this, the alignment system 100 provided by the present application can simultaneously detect a plurality of focusing distances of the optical device 130, and does not need to repeatedly align the plurality of focusing distances, thereby improving the alignment efficiency and the alignment accuracy. The focusing distance referred to herein is essentially the optical path of the corresponding light path, and the optical path of each light path refers to the product of the distance of the light of each light path propagating from the optical device 130 to the corresponding detection module 120 and the refractive index of the medium through which the light passes.

[0075] The light splitting module 110 can include n light splitting elements arranged along the optical axis of the optical device 130 and form n+1 light paths, n≥1. The light splitting element can be, for example, a cubic light splitting mirror, a flat plate light splitting mirror or other forms of light splitting devices. As an example, as shown in Figure 1 and Figure 2 The light splitting module 110 can include a first light splitting element 111 and a second light splitting element 112, and the light emitted by the optical device 130 will form three light paths after passing through the light splitting module 110, in which case n=2. It should be understood that the number of light splitting elements included in the light splitting module 110 is only exemplary, which is not specifically limited in the present application.

[0076] The plurality of light paths can include a first light path and a second light path. For light in the first light path, the light changes a propagation path of the light after passing through the corresponding light splitting element, for example, the propagation path of the light after passing through the corresponding light splitting element can be perpendicular to the optical axis of the optical device 130. For light in the second light path, the light does not change the propagation path of the light after passing through the corresponding light splitting element, that is, the light in the second light path always propagates in a direction parallel to the optical axis, that is, the second light path is parallel to the optical axis. As an example, as shown in Figure 1 and Figure 2 , the light rays emitted by the optical device 130 form two first light paths and one second light path after passing through the light splitting module 110. It should be understood that the number of light paths is only exemplary, which depends on the number of light splitting elements included in the light splitting module 110, which is not specifically limited in the present application.

[0077] The plurality of detection modules 120 can include a first detection module 121 and a second detection module 122. The first detection module 121 corresponds to the first light path. The second detection module 122 corresponds to the second light path. As an example, as shown in Figure 1 and Figure 2 , the plurality of detection modules 120 includes two first detection modules 121 and one second detection module 122. It should be understood that the number of detection modules 120 is only exemplary, which depends on the number of light paths, which is not specifically limited in the present application.

[0078] With reference to Figure 1 , the alignment system 100 can further include a focusing lens 140. The focusing lens 140 can be located on the second light path and disposed between the light splitting element corresponding to the second light path and the second detection module 122. By disposing the focusing lens 140 on the second light path, the detection of the optical device 130 at infinity can be realized. As an example, the focusing lens 140 can be disposed between the second light splitting element 112 and the second detection module 122.

[0079] For the alignment system 100 shown in Figure 1 , the light rays emitted by the optical device 130 can be split into the first light path for detecting the finite distance and the second light path for detecting the infinite distance by the light splitting module 110 and the focusing lens 140, thereby simultaneously realizing the near-field detection and the far-field detection of the optical device 130. Moreover, when detecting different finite distances of the optical device 130, different finite distances of the optical device 130 can be simultaneously aligned without moving, thereby improving the alignment efficiency and the alignment accuracy.

[0080] With reference to Figure 2 , the alignment system 100 does not include the focusing lens 140, which means Figure 2The first optical path and the second optical path in the shown assembling system 100 are both for realizing the limited distance detection of the optical device 130, i.e. both for realizing the near field detection of the optical device 130. The limited distance detection of the optical device 130 is realized by using Figure 2 The shown assembling system 100 can realize the assembling of different limited distances of the optical device 130 at the same time, which improves the assembling efficiency and the assembling precision.

[0081] Figure 3 The optical path schematic diagram of the limited distance detection of the optical device 130 according to the example embodiment of the present application is shown. Figure 4 The optical path schematic diagram of the infinite distance detection of the optical device 130 according to the example embodiment of the present application is shown.

[0082] Referring to Figure 3 , the solid line area represents the ideal position of the optical device 130, the dashed line area represents the actual position of the optical device 130, d represents the eccentricity value of the optical device 130, θ represents the tilt angle of the optical device 130, l represents the optical path of the optical path, and △h represents the position offset of the light of the optical path at the detection module 120. For the optical path for the limited distance detection, the calculation formula of the eccentricity value d of the optical device 130 is:

[0083] d = △h - l x tanθ Formula (1)

[0084] When △h and l are known, θ and d can be solved respectively by simultaneously solving any two equations. In other words, θ and d can be solved respectively by formula (1) under any two limited distances. After obtaining θ and d, the tilt angle θ and the eccentricity value d of the optical device 130 are adjusted, and the assembling of the optical device 130 is realized.

[0085] It should be understood that the tilt angle θ of the optical device 130 refers to any one tilt angle or various combinations of the three in the X direction, the Y direction and the Z direction of the optical device 130, and the eccentricity value d of the optical device 130 refers to any one eccentricity value or various combinations of the three in the X direction, the Y direction and the Z direction of the optical device 130. When adjusting the tilt angle θ and the eccentricity value d of the optical device 130, they can be decoupled into three components in the X direction, the Y direction and the Z direction and adjusted respectively.

[0086] Referring to Figure 4, the solid area represents the ideal position of the optical device 130, the dashed area represents the actual position of the optical device 130, d represents the eccentricity value of the optical device 130, θ represents the tilt angle of the optical device 130, L represents the distance between the focusing lens 140 and the optical device 130 in the direction parallel to the optical axis, F represents the focal length of the focusing lens 140, and △h represents the position offset of the light of the optical path at the detection module 120. For the optical path used for detecting an infinite distance, the calculation formula of the position offset △h of the light of the optical path at the detection module 120 is:

[0087] △h = F x tanθ Formula (2)

[0088] When △h and F are known, θ can be obtained based on Formula (2), where θ = arctan(△h / F). For the optical path used for detecting an infinite distance, the calculation formula of the eccentricity value d of the optical device 130 is:

[0089] d = L x tanθ Formula (3)

[0090] After θ is obtained, d can be directly obtained based on Formula (3).

[0091] Therefore, the eccentricity value of the optical device 130 can be obtained by both Formula (1) and Formula (3), where the application scenarios of Formula (1) and Formula (3) are different, Formula (1) is used to obtain the eccentricity value under a finite distance, and Formula (3) is used to obtain the eccentricity value under an infinite distance.

[0092] Reference Figure 1 When the first optical path is used for detecting the finite distance of the optical device 130, the eccentricity value d1 of the optical device 130 can be obtained by using Formula (1), where d1 is the eccentricity value corresponding to the first optical path; when the second optical path is used for detecting the infinite distance of the optical device 130, the eccentricity value d2 of the optical device 130 can be obtained by using Formula (3), where d2 is the eccentricity value corresponding to the second optical path.

[0093] As an example, the eccentricity value d1 of the optical device 130 can satisfy: d1 = △h1 - l1 x tanθ, where θ is the tilt angle of the optical device 130, △h1 is the position offset of the light of the first optical path at the first detection module 121, and l1 is the optical path of the first optical path.

[0094] As an example, the eccentricity d2 of the optical device 130 can satisfy: d2 = L2 x tan θ, where θ = arctan (△h2 / F), and θ is the tilt angle of the optical device 130, △h2 is the position offset of the light of the second light path at the second detection module 122, F is the focal length of the focusing lens 140, and L2 is the distance from the focusing lens 140 to the optical device 130 in the direction parallel to the optical axis.

[0095] Reference is made to Figure 2 When the first light path and the second light path are both used for finite distance detection of the optical device 130, the eccentricity d1 corresponding to the first light path and the eccentricity d2 corresponding to the second light path of the optical device 130 can be obtained by using formula (1).

[0096] As an example, the eccentricity d1 of the optical device 130 can satisfy: d1 = △h1 - l1 x tan θ, where θ is the tilt angle of the optical device 130, △h1 is the position offset of the light of the first light path at the first detection module 121, and l1 is the optical path of the first light path.

[0097] As an example, the eccentricity d2 of the optical device 130 can satisfy: d2 = △h2 - l2 x tan θ, where θ is the tilt angle of the optical device 130, △h2 is the position offset of the light of the second light path at the second detection module 122, and l2 is the optical path of the second light path.

[0098] When calculating the eccentricity and / or the tilt angle of the optical device 130, the coordinate system in which the plurality of light paths are located is normalized to obtain a light path coordinate system as shown in Figure 5 Reference is made to Figure 6 , the reference coordinate of the light of the finite distance light path at the detection module is O point, and the imaging point coordinate of the light of the finite distance light path at the detection module is (X1, Z1). Figure 7 Reference is made to

[0099] For the light of the infinite distance light path, the deviation of the imaging point coordinate is only related to the tilt angle of the optical device, and is irrelevant to the eccentricity of the optical device (or has little effect, which can be basically ignored in actual engineering calculation). Figure 5, the tilt angle of the optical device can be decomposed into three components, which are rotations around the X-axis, Y-axis and Z-axis, denoted as Tilt_X, Tilt_Y and Tilt_Z, wherein Tilt_X causes deviation of the imaging point coordinate in the Z direction, Tilt_Z causes deviation of the imaging point coordinate in the X direction, and Tilt_Y does not cause any deviation of the imaging point coordinate. Specifically, Tilt_X = arctan(Z2 / F), and Tilt_Z = arctan(X2 / F). After rotating by -arctan(Z2 / F) degrees in Tilt_X and rotating by -arctan(X2 / F) degrees in Tilt_Z, the imaging point coordinate of the light of the infinite distance light path can be adjusted to the reference coordinate O' point. It should be noted that the quadrant position of the imaging point coordinate of the light determines the positive and negative of the angle. Tilt_X is + in the pitch-up direction and - in the pitch-down direction; Tilt_Z is + in the right direction and - in the left direction.

[0100] For the light of the finite distance light path, the deviation of the imaging point coordinate is related not only to the tilt angle of the optical device, but also to the eccentricity of the optical device. The eccentricity of the optical device can be decomposed into three components, which are movements of the X-axis, Y-axis and Z-axis, denoted as ΔX, ΔY and ΔZ, wherein ΔX causes deviation of the imaging point coordinate in the X direction, ΔZ causes deviation of the imaging point coordinate in the Z direction, and ΔY causes a small change in the optical path of the finite distance light path, but is relatively small in magnitude and does not have a significant impact on the imaging point coordinate, which is generally not considered.

[0101] Assuming that the optical path of the finite distance light path is l1, then X1 = ΔX + l1 × X2 / F, Z1 = ΔZ + l1 × Z2 / F, and ΔX and ΔZ are the eccentricity of the finite distance light path. By moving -(X1-l1×X2 / F) in the X direction and -(Z1-l1×Z2 / F) in the Z direction, the imaging point coordinate of the light of the finite distance light path can be adjusted to the reference coordinate O point.

[0102] When adjusting the optical device, the above adjustment method for both the infinite distance and the finite distance can be used, or the tilt angle of the infinite distance can be adjusted first and then the eccentricity of the finite distance can be adjusted. By decoupling the adjustment steps of the finite distance and the infinite distance, and combining the internal decoupling of the finite distance and the infinite distance, a unique adjustment solution can be obtained, so that the optical device can be quickly and accurately adjusted, and the adjustment accuracy and efficiency are improved.

[0103] The focusing lens 140 generally has aberration, for example, the central region has small aberration and the edge region has large aberration, which causes the imaging of the non-central region of the focusing lens 140 to deviate from the result calculated according to the ideal lens model, that is, the tilt angle according to the theoretical calculation deviates from the tilt angle actually required to be adjusted, and multiple iterations are required to gradually reduce it to the standard range, which is low in adjustment efficiency.

[0104] The method for correcting the above-mentioned aberration is generally to shoot a calibration chart (generally a chessboard) at different angles, to obtain the ideal value and the actual value of the calibration point pixel, to generate a coordinate mapping table, to use the coordinate mapping table for the correction program of the image with aberration, and finally to obtain the image without aberration. However, since the focusing lens 140 is generally a single lens, the imaging quality is limited, the clarity of the calibration chart picture is low, the accuracy of capturing the calibration chart corner points is low, and the final correction effect is poor, which cannot meet the requirements.

[0105] Suppose that the angle adjustment accuracy requirement of the infinite light path is θ adj , and the light emitted by the optical device 130 is perpendicular to the focusing lens 140. When the optical device 130 is adjusted at an infinite distance, step adjustment is performed in the Tilt_X and Tilt_Z directions according to θ adj , that is, the imaging point position of the light of the infinite light path is moved in the Z coordinate direction and the X coordinate direction, and the actual imaging point coordinates of the light of the infinite light path after each adjustment are recorded until the imaging point of the light of the infinite light path exceeds the detection target surface of the second detection module 122. The actual imaging point coordinates of the light of the infinite light path are compared with the theoretical imaging point coordinates, which are obtained by an ideal lens, and the detection target surface is divided into multiple regions according to the difference level. Each region corresponds to a difference level, and the difference between adjacent levels is one difference. For example, one difference can be θ adj / 5 or θ adj / 2. It should be understood that the specific value of one difference can be adjusted according to actual needs, but one difference cannot exceed θ adj / 2. The number of regions of the detection target surface can be determined according to the specific value of the difference, and different regions have different angle compensation amounts Δθ.

[0106] Reference Figure 8The detection target surface of the second detection module 122 may include a first region I, a second region II, and a third region III, and the first region I, the second region II, and the third region III are arranged in sequence from the center to the edge of the detection target surface. The angle compensation amount of the first region I is △θ1, the angle compensation amount of the second region II is △θ2, and the angle compensation amount of the third region III is △θ3, and △θ1<△θ2<△θ3. △θ1 can be 0. The angle compensation amount of the optical device 130 can be determined based on the coordinates of the imaging point of the light of the second optical path in the second detection module 122. For example, when the imaging point of the light of the second optical path is located in the first region I, the angle compensation amount of the optical device 130 is △θ1; when the imaging point of the light of the second optical path is located in the second region II, the angle compensation amount of the optical device 130 is △θ2; when the imaging point of the light of the second optical path is located in the third region III, the angle compensation amount of the optical device 130 is △θ3. Finally, the optical device 130 is adjusted according to the angle compensation amount and the tilt angle of the optical device 130 , so that infinite distance adjustment of the optical device 130 can be achieved.

[0107] The parameter settings of the spectrometer element, the detection module 120 and the focusing lens 140 are described in detail below.

[0108] As an example, Figure 1 and Figure 2 As shown, the effective aperture of each spectrometer is Can satisfy: Wherein, L1 is the distance between each beam splitting element and the optical device 130 in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device 130, d max is the maximum eccentricity of the optical device 130, and D is the spot size of the optical device 130. In one example, The spectroscopic elements may include, but are not limited to, a first spectroscopic element 111 and a second spectroscopic element 112. By ensuring that the effective aperture of each spectroscopic element satisfies the above-mentioned conditional formula, it is ensured that each spectroscopic element can fully receive the light emitted by the optical device 130, thereby preventing the spectroscopic element from receiving incomplete information or receiving no information at all. This facilitates the subsequent determination of the system's adjustment direction and avoids the need to traverse various directions until the light spot is within the detection range of the detection module 120 during subsequent adjustment. This improves adjustment efficiency while reducing the risk of interference.

[0109] As an example, Figure 1 and Figure 2 As shown, the effective aperture Φ1 of each first detection module 121 can satisfy: 1≤Φ1 / (l1×tanθ max +d max+D)≤5, where l1 is the optical path of each first optical path, θ max is the maximum tilt angle of the optical device 130, d max is the maximum eccentricity of the optical device 130, and D is the spot size of the optical device 130. In one example, 1.2≤Φ1 / (l1×tanθ max +d max +D)≤2. By ensuring that the effective aperture of each first detection module 121 satisfies the above conditional expression, it is possible to ensure that each first detection module 121 can fully receive the light corresponding to the first optical path, thereby preventing the first detection module 121 from receiving incomplete information or receiving no information at all. This facilitates determining the system's adjustment direction and also avoids traversing various directions until the light spot is within the detection range of the first detection module 121 during adjustment. This improves adjustment efficiency while reducing the risk of interference.

[0110] As an example, Figure 1 As shown, the effective aperture Φ2 of the second detection module 122 can satisfy: 1≤Φ2 / (F×tanθ max )≤5, where F is the focal length of the focusing lens 140, θ max is the maximum tilt angle of the optical device 130. In one example, 1.2≤Φ2 / (F×tanθ max )≤2. By ensuring that the effective aperture of the second detection module 122 satisfies the above conditional expression, it is ensured that the second detection module 122 can fully receive the light corresponding to the second optical path, thereby preventing the second detection module 122 from receiving incomplete information or receiving no information at all. This facilitates the determination of the system's adjustment direction and avoids traversing various directions until the light spot is within the detection range of the second detection module 122 during adjustment. This improves adjustment efficiency while reducing the risk of interference.

[0111] As an example, Figure 1 As shown, the effective aperture of the focusing lens 140 Can satisfy: Wherein, L2 is the distance between the focusing lens 140 and the optical device 130 in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device 130, d max is the maximum eccentricity of the optical device 130, and D is the spot size of the optical device 130. In one example, By making the effective aperture of the focusing lens 140 satisfy the above condition formula, it can be ensured that the focusing lens 140 can sufficiently receive the light emitted by the optical device 130, avoid that the focusing lens 140 receives incomplete information or receives no information, facilitate subsequent judgment of the adjustment direction of the system, and also avoid that each direction is traversed until the spot is within the detection range of the second detection module 122 during subsequent adjustment, improve the adjustment efficiency, and reduce the risk of interference.

[0112] As an example, as shown in Figure 2 , the effective aperture Φ2 of the second detection module 122 can satisfy: 1≤Φ2 / (l2×tanθ max +d max +D)≤5, where l2 is the optical path of the second light path, θ max is the maximum tilt angle of the optical device 130, d max is the maximum eccentricity of the optical device 130, and D is the spot size of the optical device 130. In an example, 1.2≤Φ2 / (l2×tanθ max +d max +D)≤2. By making the effective aperture of the second detection module 122 satisfy the above condition formula, it can be ensured that the second detection module 122 can sufficiently receive the light corresponding to the second light path, avoid that the second detection module 122 receives incomplete information or receives no information, facilitate judgment of the adjustment direction of the system, and also avoid that each direction is traversed until the spot is within the detection range of the second detection module 122 during adjustment, improve the adjustment efficiency, and reduce the risk of interference.

[0113] As an example, as shown in Figure 1 and Figure 2 , the adjustment system 100 can satisfy: 0.2≤L1 / l1≤0.8, where L1 is the distance of the light splitting element from the optical device 130 in the direction parallel to the optical axis, and l1 is the optical path of the first light path. In an example, 0.33≤L1 / l1≤0.67. The effective aperture required by the light splitting element is linearly and positively correlated with the distance of the light splitting element from the optical device 130 in the direction parallel to the optical axis, i.e., the farther the distance of the light splitting element from the optical device 130 in the direction parallel to the optical axis, the larger the effective aperture required by the light splitting element. By controlling the above condition formula, the light splitting element can be in a suitable position, thereby facilitating selection of a light splitting element with a suitable effective aperture to ensure that the light splitting element sufficiently receives the light emitted by the optical device 130 while reducing costs.

[0114] As an example, as shown in Figure 1 , the adjustment system 100 can satisfy: L2>L 12 +(L 12 ×tanθ max +dmax + D) / 2, where L2 is a distance from the optical device 130 to the focusing lens 140 in a direction parallel to the optical axis, L 12 is a distance from the optical device 130 to the light splitting element corresponding to the second light path in a direction parallel to the optical axis, θ max is a maximum tilt angle of the optical device 130, d max is a maximum decentration of the optical device 130, and D is a spot size of the optical device 130. The effective aperture required for the focusing lens 140 is linearly and positively related to the distance from the optical device 130 to the focusing lens 140 in a direction parallel to the optical axis, i.e., the farther the distance from the optical device 130 to the focusing lens 140 in a direction parallel to the optical axis, the larger the effective aperture required for the focusing lens 140. By controlling the above condition formula, the focusing lens 140 can be placed in a proper position, thereby facilitating selection of a focusing lens 140 with a proper effective aperture to ensure that the optical device 130 emits light rays are sufficiently received by the focusing lens 140 while reducing costs.

[0115] As an example, the optical device 130 can include an emitting device. The alignment system 100 can satisfy F x tan θ Tx / A ≥ 2, where F is a focal length of the focusing lens 140, θ Tx is a preset alignment accuracy of the emitting device, and A is a preset resolution of the second detection module 122. In an example, 5 ≤ F x tan θ Tx / A ≤ 10. The preset alignment accuracy of the emitting device can be converted into a displacement by the focusing lens 140, and an amplification of the accuracy requirement is achieved, which facilitates rapid alignment of the emitting device and improves the alignment efficiency of the emitting device.

[0116] As an example, the optical device 130 can include a simulation device configured as a device designed based on a receiving device and similar to the emitting device. The alignment system 100 can satisfy ((F / f) x F x tan θ Rx ) / A ≥ 2, where F is a focal length of the focusing lens 140, f is a focal length of the receiving device, θ Rx is a preset alignment accuracy of the receiving device, and A is a preset resolution of the second detection module 122. In an example, 5 ≤ ((F / f) x F x tan θ Rx ) / A ≤ 10. The simulation device and the focusing lens 140 form a new optical system, which can convert the preset alignment accuracy of the receiving device into a displacement and achieve an amplification of the accuracy requirement, for example, with a magnification of F / f, which facilitates rapid alignment of the receiving device and improves the alignment efficiency of the receiving device.

[0117] As an example, the optical device 130 can include a transmitting device and an analog device configured to be designed based on a receiving device and similar to the transmitting device. The alignment system 100 can satisfy: F x tan θ Tx / A ≥ 2, and ((F / f) x F x tan θ Rx ) / A ≥ 2, where F is a focal length of the focusing lens 140, f is a focal length of the receiving device, θ Tx is a preset alignment accuracy of the transmitting device, θ Rx is a preset alignment accuracy of the receiving device, and A is a preset resolution of the second detection module 122. In an example, 5 ≤ F x tan θ Tx / A ≤ 10, 5 ≤ ((F / f) x F x tan θ Rx ) / A ≤ 10. When the transmitting device and the receiving device are aligned simultaneously by using the alignment system 100, the alignment efficiency and the alignment accuracy of the transmitting device and the receiving device can be improved by controlling the above conditions.

[0118] Figure 9 A structural diagram of the detection module 120 according to an example embodiment of the present application is shown. The detection module 120 can include a first detection module 121 and a second detection module 122.

[0119] The light emitted by the optical device 130 can be near-infrared light. The detection module 120 can include a near-infrared response element 1201, a diffuse film 1202, and a visible light camera element 1203. The near-infrared response element 1201 is located on the receiving side of the detection module 120 and converts the near-infrared light into visible light. The diffuse film 1202 is disposed on the side of the near-infrared response element 1201 away from the light splitting module 110 and diffusely reflects the visible light. The visible light camera element 1203 is disposed on the side of the diffuse film 1202 away from the near-infrared response element 1201 and detects the diffusely reflected visible light. The visible light camera element 1203 can be composed of a visible light lens and a visible light camera.

[0120] The visible light emitted by the near-infrared response element 1201 has a certain directivity, which is related to the incident direction of the near-infrared light. This can cause part of the visible light to exceed the light receiving range of the visible light camera element 1203, so that the visible light camera element 1203 cannot capture the part of the light that exceeds the light receiving range, the edge light spot is dark in brightness on the visible light camera element 1203, and the intensity of the light spot cannot be truly reflected.

[0121] By disposing the diffuse film 1202 on the light-out side of the near-infrared response element 1202, the diffuse film 1202 can be used to change the light with a certain directivity into diffuse reflection light, so that the visible light is more easily received by the visible light camera element 1203, and the spot position, size and intensity of the visible light on the diffuse film 1202 are consistent with the spot position, size and intensity of the visible light emitted by the near-infrared response element 1202, so as to ensure that the visible light camera element 1203 can truly reflect the position, size and intensity of the spot, so as to facilitate the analysis of the parameters of the spot under different focusing distances.

[0122] Compared with the conventional near-infrared detector, the detection target surface of the detection module 120 provided in the present application has a larger adjustment space. Only different sizes of the near-infrared response element 1201, the diffuse film 1202 and the visible light camera element 1203 need to be selected or cut according to the actual needs, and the cost is basically unchanged. However, the cost of the conventional near-infrared detector increases geometrically with the size of the detection target surface. The cost of the detection module 120 provided in the present application is about 1% to 10% of the cost of the conventional near-infrared detector.

[0123] In addition, the diffuse film 1202 can be attached to the side of the near-infrared response element 1202 away from the light splitting module 110. The thickness K of the diffuse film 1202 can satisfy: 10≤K / λ≤500, where λ is the wavelength of the light emitted by the optical device 130. As an example, 100≤K / λ≤200. By making the thickness of the diffuse film 1202 satisfy the above condition, the problem of too low spot intensity of the visible light after passing through the diffuse film 1202 or the problem of unsatisfactory diffuse reflection effect of the visible light after passing through the diffuse film 1202 can be avoided.

[0124] It should be understood that when the light emitted by the optical device 130 is visible light, the detection module 120 can be composed of the diffuse film 1202 and the visible light camera element 1203, or composed of the visible light camera element 1203.

[0125] Figure 10 And Figure 11 respectively show the structure schematic diagram of the optical device assembly system 100 according to other exemplary embodiments of the present application.

[0126] Reference Figure 10 And Figure 11 The number of the light splitting modules 110 included in the assembly system 100 can be multiple, and the multiple light splitting modules 110 can be arranged on the multiple beam field angle light of the optical device 130, and each light splitting module 110 can split the corresponding beam field angle light into multiple light paths.

[0127] As an example, the alignment system 100 can include m light splitting modules 110, each of which can include n light splitting elements arranged along an optical axis of the optical device 130, where m≥2 and n≥1. After passing through the m light splitting modules 110, the light rays emitted by the optical device 130 can form m×(n+1) light paths. Accordingly, the number of the detection modules 120 can be m×(n+1).

[0128] By arranging the light splitting modules 110 on the light rays of different field angles of the optical device 130, each light splitting module 110 can split the light rays of the corresponding field angle into multiple light paths, and each light path can be provided with a detection module 120, so that the alignment system 100 can simultaneously detect multiple focus distances and multiple field angles of the optical device 130 without repeatedly adjusting the multiple focus distances and the multiple field angles, thereby improving the alignment efficiency and the alignment accuracy.

[0129] It should be understood that, Figure 10 The alignment process of the alignment system 100 for each field angle is the same as that of the alignment system 100 shown in Figure 1 The alignment process of the alignment system 100 for each field angle is the same as that of the alignment system 100 shown in Figure 11 The alignment process of the alignment system 100 for each field angle is the same as that of the alignment system 100 shown in Figure 2 When the adjustment ranges of the multiple field angles are different, the requirements of the multiple field angles need to be considered comprehensively, and the intersection of the adjustment ranges of the multiple field angles is taken as the final adjustment range.

[0130] The alignment system 100 shown in Figure 1 The alignment system 100 shown in Figure 1 The alignment system 100 shown in Figure 1 It should be understood that the alignment system 100 shown in Figure 1 The alignment system 100 shown in

[0131] The alignment system 100 shown in Figure 2 The alignment system 100 shown in Figure 2 The alignment system 100 shown in

[0132] The alignment system 100 shown inFigure 1 or Figure 2 When aligning a transmitter using the illustrated alignment system 100, the optical device 130 serves as the transmitter, which can be the transmitter of a LiDAR system. The optimal position of the transmitter can be determined based on the positional offset of light emitted by the transmitter on the first detection module 121 and the second detection module 122. By adjusting the transmitter to this optimal position, high-precision alignment of the transmitter can be achieved.

[0133] use Figure 1 When aligning a receiving device with the illustrated alignment system 100, the optical device 130 is configured as a simulated device similar to the transmitting device, designed based on the receiving device. After aligning the simulated device, the pose of the simulated device is recorded, and the receiving detector within the receiving device is then adjusted to that pose. The receiving device can be the receiving end of a LiDAR system and can include a receiving end lens and a receiving end detector.

[0134] Figure 12 A schematic diagram of an optical path for aligning an analog device using an alignment system 100 according to an exemplary embodiment of the present application is shown. When aligning the analog device, only the second optical path for infinite distance detection is used.

[0135] refer to Figure 12 , the optical device 130 is an analog device. The analog device may include a receiving end lens 131 and a light source element 132, wherein the light source element 132 is used to simulate the receiving channel of the receiving end detector. The light source element 132 may include at least one sub-light source. When the light source element 132 includes multiple sub-light sources, the multiple sub-light sources are distributed linearly or in an array. The sub-light sources correspond one-to-one or partially to the receiving channels of the receiving end detector. Accordingly, the number of sub-light sources is the same as the number of receiving channels of the receiving end detector, or the number of sub-light sources is less than the number of receiving channels of the receiving end detector. As an example, the light source element 132 includes three sub-light sources, which can simulate the three receiving channels of the receiving end detector. In this case, the light source element 132 can simulate the entire image plane of the receiving element. The light source element 132 may include, but is not limited to, a vertical cavity surface emitting laser (VCSEL) or an optical fiber array element.

[0136] Figure 13 、 Figure 14 and Figure 15 1 and 2 show the corresponding schematic diagrams of the light source element 132 and the receiving end detector 1301. Figure 13 As shown, the receiving end detector 1301 is a point-type receiving end detector, which only includes one receiving channel 1302. Correspondingly, the light source element 132 includes one sub-light source. Figure 14As shown, the receiving end detector 1301 is a linear receiving end detector, which includes a plurality of receiving channels 1302 arranged linearly, and the plurality of light source elements 132 can include a plurality of sub-light sources (a, b or c) arranged linearly. Figure 14 As shown, the receiving end detector 1301 is a linear receiving end detector, which includes a plurality of receiving channels 1302 arranged linearly, and the plurality of light source elements 132 can include a plurality of sub-light sources (a, b or c) arranged linearly. Figure 15 As shown, the receiving end detector 1301 is an array receiving end detector, which includes a plurality of receiving channels 1302 arranged in an array, and the light source element 132 includes a plurality of sub-light sources (a or b) arranged in an array. Figure 15 The structure of the light source element 132 can be determined in advance according to the type of the receiving end detector 1301 of the receiving device.

[0137] When assembling the above-mentioned simulation device, the optimal pose of the light source element 132, i.e., the pose of the receiving end detector to be assembled, can be determined according to the position of the light spot on the detection module 120, i.e., the second detection module 122. Finally, the receiving end detector is adjusted to the optimal pose of the light source element 132 by a multi-axis and is replaced, so as to finally realize high-precision assembly of the receiving device.

[0138] The specific embodiments of the assembly system 100 of the optical device applicable to the above-mentioned embodiments are further described below.

[0139] Example 1

[0140] Figure 1 The structural schematic diagram of the assembly system 100 of the optical device of embodiment 1 is shown. Figure 3 The optical path schematic diagram of the limited distance detection of the optical device 130 of embodiment 1 is shown. Figure 4 The optical path schematic diagram of the infinite distance detection of the optical device 130 of embodiment 1 is shown.

[0141] Referring to Figure 1 The assembly system 100 can include a light splitting module 110, three detection modules 120 and a focusing lens 140, wherein the light splitting module 110 includes a first light splitting element 111 and a second light splitting element 112. The light emitted by the optical device 130 will form three light paths after passing through the light splitting module 110, specifically including a first light path A, a first light path B and a second light path. The optical paths of the three light paths are different, for example, the optical path of the first light path A is l 1A The optical path of the first light path B is l 1B, and the optical path of the second light path is l2. Correspondingly, the three detection modules 120 include two first detection modules 121 and one second detection module 122. The focusing lens 140 can be arranged between the second light splitting element 112 and the second detection module 122. The alignment system 100 can be applied to the transmitting end or the receiving end of a laser radar system which has a position requirement at a short distance and a ranging requirement at a long distance (for example, greater than or equal to 200 m).

[0142] The light emitted from the optical device 130 is split into two parts after passing through the first light splitting element 111. One part of the light is reflected by the first light splitting element 111 and transmitted to a first detection module 121, and this part of the light forms a first light path A, and the optical path of the first light path A is l 1A ; the other part of the light transmits through the first light splitting element 111 and reaches the second light splitting element 112, and the second light splitting element 112 reflects and transmits a part of the received light to another first detection module 121, and this part of the light forms a first light path B, and the optical path of the first light path B is l 1B ; the other part of the light transmits through the first light splitting element 111 and reaches the second light splitting element 112, and the second light splitting element 112 reflects and transmits a part of the received light to another first detection module 121, and this part of the light forms a first light path B, and the optical path of the first light path B is l

[0143] It should be understood that the number of light splitting elements, light paths, and detection modules 120 is only exemplary, and can be increased or decreased according to actual needs, which is not specifically limited in the present application.

[0144] The basic parameters of the alignment system 100 of the present embodiment are as follows:

[0145] The distance L 11 of the first light splitting element 111 from the optical device 130 in the direction parallel to the optical axis is 100 mm;

[0146] The distance L 12 of the second light splitting element 112 from the optical device 130 in the direction parallel to the optical axis is 200 mm;

[0147] The distance L2 of the focusing lens 140 from the optical device 130 in the direction parallel to the optical axis is 300 mm;

[0148] The optical path l 1A of the first light path A is 150 mm;

[0149] The optical path l 1B of the first light path B is 250 mm;

[0150] The maximum tilt angle θ max of the optical device 130 is 4°;

[0151] The maximum decentration value d of the optical device 130 max = 2 mm;

[0152] The spot size D of the optical device 130 = 1.5 mm; and

[0153] The focal length F of the focusing lens 140 = 100 mm.

[0154] Correspondingly, the effective aperture of the first light splitting element 111 Can satisfy: Preferably,

[0155] The effective aperture of the second light splitting element 112 Can satisfy: Preferably,

[0156] The effective aperture of the focusing lens 140 Can satisfy: Preferably,

[0157] The effective aperture Φ of the first detection module 121 corresponding to the first light path A 1A Can satisfy: 14 mm < Φ < 70 mm, preferably, 16.8 mm < Φ < 28 mm. 1A 1A

[0158] The effective aperture Φ of the first detection module 121 corresponding to the first light path B 1B Can satisfy: 21 mm < Φ < 105 mm, preferably, 25.2 mm < Φ < 42 mm. 1B 1B

[0159] The effective aperture Φ2 of the second detection module 122 can satisfy: 7 mm < Φ2 < 35 mm, preferably, 8.4 mm < Φ2 < 14 mm.

[0160] The distance L of the first light splitting element 111 from the optical device 130 in the direction parallel to the optical axis 11 The optical path length l of the first light path A 1A Satisfies: L < l < 0.67l. 11 1A

[0161] The distance L of the second light splitting element 112 from the optical device 130 in the direction parallel to the optical axis 12 The optical path length l of the first light path B 1B Satisfies: L < l < 0.8l. 12 1B ​​​​​​​​

[0162] Example 2

[0163] Figure 2 A structure diagram of the alignment system 100 of the optical device of Embodiment 2 is shown. Figure 3 A light path diagram of the finite distance detection of the optical device 130 of Embodiment 2 is shown.

[0164] Reference Figure 2 The alignment system 100 can include a light splitting module 110 and three detection modules 120, wherein the light splitting module 110 includes a first light splitting element 111 and a second light splitting element 112. After the light emitted by the optical device 130 passes through the light splitting module 110, three light paths are formed, specifically including a first light path A, a first light path B and a second light path. The optical paths of the three light paths are different, for example, the optical path of the first light path A is l 1A , the optical path of the first light path B is l 1B , and the optical path of the second light path is l2. Correspondingly, the three detection modules 120 include two first detection modules 121 and one second detection module 122. The alignment system 100 can be applied to the transmitting end or receiving end of a laser radar system which has a position requirement at a near distance and a distance measurement requirement close (for example, greater than or equal to 30 m).

[0165] After the light emitted by the optical device 130 passes through the first light splitting element 111, the light is divided into two parts. One part of the light is reflected by the first light splitting element 111 and transmitted to one first detection module 121, and this part of the light forms the first light path A, and the optical path of the first light path A is l 1A ; the other part of the light transmits through the first light splitting element 111 and reaches the second light splitting element 112, and the second light splitting element 112 reflects and transmits the received part of the light to the other first detection module 121, and this part of the light forms the first light path B, and the optical path of the first light path B is l 1B ; the other part of the light received by the second light splitting element 112 transmits through the second light splitting element 112 and is transmitted to the second detection module 122, and this part of the light forms the second light path, and the optical path of the second light path is l2.

[0166] It should be understood that the number of light splitting elements, light paths and detection modules 120 is only exemplary, which can be increased or decreased according to the number of focusing distances, and the present application does not make specific limitation thereto.

[0167] The basic parameters of the alignment system 100 of the present embodiment are as follows:

[0168] The distance L 11 of the first light splitting element 111 from the optical device 130 in the direction parallel to the optical axis is 100 mm.

[0169] The distance L of the second light splitting element 112 from the optical device 130 in the direction parallel to the optical axis 12 = 200 mm;

[0170] The optical path length l of the first light path A 1A = 150 mm;

[0171] The optical path length l of the first light path B 1B = 250 mm;

[0172] The optical path length l2 of the second light path = 350 mm;

[0173] The maximum tilt angle θ of the optical device 130 max = 4°;

[0174] The maximum decentration value d of the optical device 130 max = 2 mm; and

[0175] The spot size D of the optical device 130 = 1.5 mm.

[0176] Correspondingly, the effective aperture Φ1 of the first light splitting element 111 Can satisfy: Preferably,

[0177] The effective aperture Φ2 of the second light splitting element 112 Can satisfy: Preferably,

[0178] The effective aperture Φ of the first detection module 121 corresponding to the first light path A 1A Can satisfy: 14 mm < Φ < 70 mm, preferably, 16.8 mm < Φ < 28 mm. 1A 1A

[0179] The effective aperture Φ of the first detection module 121 corresponding to the first light path B 1B Can satisfy: 21 mm < Φ < 105 mm, preferably, 25.2 mm < Φ < 42 mm. 1B 1B

[0180] The effective aperture Φ2 of the second detection module 122 can satisfy: 28 mm < Φ2 < 140 mm, preferably, 33.6 mm < Φ2 < 56 mm.

[0181] The distance L of the first light splitting element 111 from the optical device 130 in the direction parallel to the optical axis 11 The optical path length l of the first light path A 1A Satisfies: L​​​​11 / l 1A = 0.67.

[0182] The distance L between the second light splitting element 112 and the optical device 130 in the direction parallel to the optical axis 12 The optical path length l of the first light path B 1B L satisfies: L 12 / l 1B = 0.8.

[0183] Example 3

[0184] Figure 10 A structural schematic diagram of the alignment system 100 of the optical device of embodiment 3 is shown. Embodiment 3 is different from embodiment 1 in that the number of the light splitting modules 110 is multiple, the multiple light splitting modules 110 are arranged on multiple beams of field angle light, and each light splitting module 110 splits the corresponding field angle light into multiple light paths. The alignment process and basic parameters of each field angle in embodiment 3 are the same as those of embodiment 1, and will not be repeated here. When the adjustment ranges under multiple field angles are different, the requirements of multiple field angles need to be considered comprehensively, and the intersection of the adjustment ranges under multiple field angles is taken as the final adjustment range. It should be noted that, Figure 10 The number of the light splitting elements contained in each light splitting module 110 shown is only exemplary, and the number of the light splitting elements contained in each light splitting module 110 can also be two or more, which is not specifically limited herein.

[0185] Example 4

[0186] Figure 11 A structural schematic diagram of the alignment system 100 of the optical device of embodiment 4 is shown. Embodiment 4 is different from embodiment 2 in that the number of the light splitting modules 110 is multiple, the multiple light splitting modules 110 are arranged on multiple beams of field angle light, and each light splitting module 110 splits the corresponding field angle light into multiple light paths. The alignment process and basic parameters of each field angle in embodiment 4 are the same as those of embodiment 2, and will not be repeated here. When the adjustment ranges under multiple field angles are different, the requirements of multiple field angles need to be considered comprehensively, and the intersection of the adjustment ranges under multiple field angles is taken as the final adjustment range. It should be noted that, Figure 11 The number of the light splitting elements contained in each light splitting module 110 shown is only exemplary, and the number of the light splitting elements contained in each light splitting module 110 can also be two or more, which is not specifically limited herein.

[0187] The second aspect of the present application provides an optical device alignment method 1000, which uses the alignment system 100 provided in the first aspect to align an optical device. The optical device may, for example, be a transmitter device and / or an analog device designed based on a receiver device, which is similar to the transmitter device. The transmitter device may, for example, be a transmitting end of a laser radar system, and the receiver device may, for example, be a receiving end of a laser radar system. It should be understood that the optical device can also be other devices, which are not specifically limited in the present application.

[0188] Figure 16 A flowchart of the optical device alignment method 1000 according to the exemplary embodiment of the present application is shown, which can include the following steps:

[0189] S10, disposing a light splitting module on a light emitting path of the optical device, the light splitting module splitting light emitted by the optical device into multiple light paths.

[0190] S20, disposing a detection module on each light path, the detection module detecting light of the corresponding light path, wherein the optical path of light of each light path is different.

[0191] The light emitted by the optical device can be split into multiple light paths by the light splitting module, and a detection module is correspondingly disposed on each light path. The optical path of light of each light path is different, so as to simultaneously realize detection of multiple focusing distances of the optical device, and repeated alignment of multiple focusing distances is not required, thereby improving the alignment efficiency and alignment accuracy. The focusing distance referred to herein is essentially the optical path of the corresponding light path, and the optical path of each light path refers to the product of the distance of light of each light path propagating from the optical device to the corresponding detection module and the refractive index of the medium through which the light passes.

[0192] The steps S10 to S20 of the exemplary embodiment of the present application are exemplarily described below.

[0193] In this step S10, a light splitting module is disposed on a light emitting path of the optical device, which splits light emitted by the optical device into multiple light paths. For example, n light splitting elements are disposed on the light emitting path of the optical device along the optical axis, so that n+1 light paths are formed after the light passes through the light splitting module, and n≥1. The light splitting module can include a first light splitting element and a second light splitting element. The light splitting element can be a cubic light splitting mirror, a flat plate light splitting mirror, or other forms of light splitting devices.

[0194] The plurality of light paths can include a first light path and a second light path. For light in the first light path, the light changes a propagation path of the light after passing through the corresponding light splitting element, for example, the propagation path of the light after passing through the corresponding light splitting element can be perpendicular to an optical axis of the optical device. For light in the second light path, the light does not change the propagation path of the light after passing through the corresponding light splitting element, that is, the light in the second light path always propagates in a direction parallel to the optical axis, that is, the second light path is parallel to the optical axis.

[0195] As an example, at least one light splitting module is arranged on the light emitting path of the optical device. When the number of light splitting modules is multiple, the multiple light splitting modules are arranged on the multiple beam field angle light rays of the optical device, and each light splitting module splits the corresponding beam field angle light ray into multiple light paths. By arranging the light splitting modules on different beam field angle light rays of the optical device, each light splitting module can split the corresponding beam field angle light ray into multiple light paths, and a detection module is arranged on each light path to ensure that multiple focusing distances and multiple beam field angles of the optical device can be detected at the same time without repeated adjustment, thereby improving the adjustment efficiency and the adjustment accuracy.

[0196] As an example, the position of the light splitting element is adjusted so that the light splitting element satisfies 0.2≤L1 / l1≤0.8, where L1 is the distance of the light splitting element from the optical device in the direction parallel to the optical axis, and l1 is the optical path of the first light path. In an example, 0.33≤L1 / l1≤0.67. The effective aperture required by the light splitting element is linearly and positively correlated with the distance of the light splitting element from the optical device in the direction parallel to the optical axis, that is, the farther the distance of the light splitting element from the optical device in the direction parallel to the optical axis, the larger the effective aperture required by the light splitting element. By controlling the above condition, the light splitting element can be in a suitable position, thereby facilitating the selection of a light splitting element with a suitable effective aperture to ensure that the light splitting element sufficiently receives the light emitted by the optical device while reducing costs.

[0197] After the plurality of light paths are formed, a detection module is arranged on each light path in this step S20 to detect the light of the corresponding light path, where the optical path of the light of each light path from the optical device to the corresponding detection module is different. For example, the multiple detection modules can include a first detection module and a second detection module. The first detection module corresponds to the first light path. The second detection module corresponds to the second light path.

[0198] As an example, the light is near-infrared light, and the detection module arranged on each light path comprises: a near-infrared responsive element, a diffuse film and a visible light camera element arranged in sequence on each light path, wherein the near-infrared responsive element is located at the receiving side of the detection module and converts the near-infrared light into visible light; the diffuse film is arranged on the side of the near-infrared responsive element away from the light splitting module and diffusely reflects the visible light; and the visible light camera element is arranged on the side of the diffuse film away from the near-infrared responsive element and detects the diffusely reflected visible light. The visible light camera element can be composed of a visible light lens and a visible light camera.

[0199] As an example, the diffuse film can be attached to the side of the near-infrared responsive element away from the light splitting module. The thickness K of the diffuse film can satisfy: 10≤K / λ≤500, wherein λ is the wavelength of the light emitted by the optical device. As an example, 100≤K / λ≤200. By making the thickness of the diffuse film satisfy the above condition, problems such as too low spot intensity of the visible light after passing through the diffuse film or unsatisfactory diffuse reflection effect of the visible light after passing through the diffuse film can be avoided.

[0200] After the detection module is arranged, the assembling method 1000 can further comprise: arranging a focusing lens on the second light path, wherein the focusing lens is located between the light splitting element corresponding to the second light path and the second detection module. By arranging the focusing lens on the second light path, the detection of the optical device at an infinite distance can be realized.

[0201] As an example, the position of the focusing lens is adjusted so that the focusing lens can satisfy: L2>L 12 +(L 12 ×tanθ max +d max +D) / 2, wherein L2 is the distance of the focusing lens from the optical device in the direction parallel to the optical axis, L 12 is the distance of the light splitting element corresponding to the second light path from the optical device in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device. The effective aperture required by the focusing lens is linearly and positively related to the distance of the focusing lens from the optical device in the direction parallel to the optical axis, that is, the farther the distance of the focusing lens from the optical device in the direction parallel to the optical axis, the larger the effective aperture required by the focusing lens. By controlling the above condition, the focusing lens can be placed in a suitable position, thereby facilitating the selection of a focusing lens with a suitable effective aperture to ensure that the light emitted by the optical device is sufficiently received by the focusing lens while reducing costs.

[0202] After the first probe module, the second probe module and / or the focusing lens are set, the alignment method 1000 can further comprise: aligning the optical device according to the position offset of the light of the second light path at the second probe module and the position offset of the light of the first light path at the first probe module.

[0203] As an example, the tilt angle of the optical device is determined according to the position offset of the light of the second light path at the second probe module, and the tilt angle θ of the optical device can satisfy: θ = arctan(△h2 / F), where △h2 represents the position offset of the light of the second light path at the second probe module, and F represents the focal length of the focusing lens; the first eccentricity value of the optical device is determined according to the tilt angle of the optical device and the position offset of the light of the first light path at the first probe module, and the first eccentricity value d1 of the optical device can satisfy: d1 = △h1-l1×tanθ, where △h1 represents the position offset of the light of the first light path at the first probe module, and l1 represents the optical path of the first light path; finally, the optical device is aligned based on the tilt angle and the first eccentricity value of the optical device.

[0204] It should be noted that when the optical device is a transmitting device, the optical device is aligned based on the tilt angle and the first eccentricity value of the optical device; when the optical device is an analog device designed based on a receiving device and similar to a transmitting device, the optical device is aligned based on the tilt angle of the optical device.

[0205] In addition, when the optical device is aligned based on the tilt angle and the first eccentricity value of the optical device, a method of first aligning the optical device at an infinite distance according to the tilt angle of the optical device and then aligning the optical device at a finite distance according to the first eccentricity value of the optical device can be used, or a method of simultaneously aligning the optical device at an infinite distance and a finite distance according to the tilt angle and the first eccentricity value of the optical device can be used.

[0206] When the method of first adjusting the optical device according to the tilt angle of the optical device at the infinite distance of the optical device and then adjusting the optical device according to the first eccentricity of the optical device at the finite distance of the optical device is adopted, first, the optical device is adjusted based on the tilt angle of the optical device; then, the optical device is adjusted based on the first eccentricity of the optical device; finally, the second eccentricity of the optical device after the second adjustment is obtained, and it is determined whether the second eccentricity of the optical device after the second adjustment is within a preset range. The second eccentricity of the optical device after the second adjustment is d2'=L2*tanθ', wherein θ'=arctan(△h2' / F), θ' is the tilt angle of the optical device after the second adjustment, △h2' is the position offset of the light of the second light path in the optical device at the second detection module, F is the focal length of the focusing lens, and L2 is the distance between the focusing lens and the optical device in the direction parallel to the optical axis. When the second eccentricity of the optical device after the second adjustment meets the requirement, that is, the second eccentricity of the optical device after the second adjustment is 0mm-1mm, it means that the adjustment of the optical device is successful.

[0207] Since the aberration of the focusing lens has a certain influence on the imaging position of the light at the second detection module, when the optical device is adjusted at the infinite distance, not only the influence of the tilt angle of the optical device needs to be considered, but also the influence of the aberration of the focusing lens needs to be considered. It needs to be understood that the optical device can be at least one of an emitter device and an analog device designed based on a receiver device and similar to the emitter device.

[0208] The step of adjusting the optical device at the infinite distance according to the tilt angle of the optical device can include: dividing the detection target surface of the second detection module into multiple regions according to the aberration of the focusing lens, different regions having different angle compensation amounts; determining the angle compensation amount of the optical device according to the imaging point coordinates of the light of the second light path at the second detection module; and adjusting the optical device based on the angle compensation amount and the tilt angle of the optical device, so as to realize the adjustment of the optical device at the infinite distance.

[0209] As an example, the eccentricity and the tilt angle of the optical device are determined according to the position offset of the light of the first light path at the first detection module and the position offset of the light of the second light path at the second detection module; and the optical device is adjusted based on the tilt angle and the eccentricity of the optical device.

[0210] Specifically, when the first light path and the second light path are both used for finite distance detection, the eccentricity of the optical device corresponding to the first light path and the second light path both satisfies formula (1), the position offset of the light of the first light path at the first detection module is △h1, the optical path of the first light path is l1, the position offset of the light of the second light path at the second detection module is △h2, and the optical path of the second light path is l2. 1 By substituting into formula (1), equation one can be obtained: d=△h1-l 1× tan θ, the position offset △h2 of the light of the second light path at the second detection module and the optical path l2 of the second light path can obtain Equation Two: d = △h2 - l2 2 × tan θ. Solving Equation One and Equation Two can calculate the eccentricity value and the tilt angle of the optical device. Finally, based on the tilt angle and the eccentricity value of the optical device, the optical device can be assembled and adjusted, that is, the limited distance assembly and adjustment of the optical device can be realized.

[0211] The parameter settings of the light splitting elements, the detection modules and the focusing lenses will be described in detail below.

[0212] As an example, the effective aperture Φ1 of each first detection module can satisfy: 1 ≤ Φ1 / (l1 x tan θ The above conditions can be satisfied: Wherein, L1 is the distance between each light splitting element and the optical device in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device. In an example, The light splitting elements can include but are not limited to the first light splitting elements and the second light splitting elements. By making the effective aperture of each light splitting element satisfy the above condition, it can be ensured that each light splitting element can fully receive the light emitted by the optical device, avoiding that the light splitting element receives incomplete information or receives no information, facilitating subsequent judgment of the adjustment direction, and also avoiding subsequent adjustment of each direction until the spot is within the detection range of the detection module, improving the adjustment efficiency and reducing the risk of interference.

[0213] As an example, the effective aperture Φ1 of each first detection module can satisfy: 1 ≤ Φ1 / (l1 x tan θ max +d max +D) ≤ 5, wherein l1 is the optical path of each first light path, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device. In an example, 1.2 ≤ Φ1 / (l1 x tan θ max +d max +D) ≤ 2. By making the effective aperture of each first detection module satisfy the above condition, it can be ensured that each first detection module can fully receive the light of the corresponding first light path, avoiding that the first detection module receives incomplete information or receives no information, facilitating judgment of the adjustment direction, and also avoiding adjustment of each direction until the spot is within the detection range of the first detection module, improving the adjustment efficiency and reducing the risk of interference.

[0214] As an example, the effective aperture Φ2 of the second detection module can satisfy: 1 ≤ Φ2 / (l2 x tan θmax +d max +D)≤5, wherein l2 is an optical path of the second light path, θ max is a maximum tilt angle of the optical device, d max is a maximum decentration of the optical device, and D is a spot size of the optical device. In an example, 1.2≤Φ2 / (l2×tanθ max +d max +D)≤2. By causing the effective aperture of the second detection module to satisfy the above conditional expression, it can be ensured that the second detection module can sufficiently receive light corresponding to the second light path, avoid that the second detection module receives incomplete information or receives no information, facilitate the judgment of the adjustment direction, and also avoid traversing each direction until the spot is within the detection range of the second detection module during adjustment, thereby improving the adjustment efficiency and reducing the risk of interference.

[0215] As an example, the effective aperture Φ2 of the second detection module can satisfy: 1≤Φ2 / (F×tanθ max )≤5, wherein F is a focal length of the focusing lens, θ max is a maximum tilt angle of the optical device. In an example, 1.2≤Φ2 / (F×tanθ max )≤2. By causing the effective aperture of the second detection module to satisfy the above conditional expression, it can be ensured that the second detection module can sufficiently receive light corresponding to the second light path, avoid that the second detection module receives incomplete information or receives no information, facilitate the judgment of the adjustment direction, and also avoid traversing each direction until the spot is within the detection range of the second detection module during adjustment, thereby improving the adjustment efficiency and reducing the risk of interference.

[0216] As an example, the effective aperture of the focusing lens may satisfy: wherein L2 is a distance of the focusing lens from the optical device in a direction parallel to the optical axis, θ max is a maximum tilt angle of the optical device, d max is a maximum decentration of the optical device, and D is a spot size of the optical device. In an example, By causing the effective aperture of the focusing lens to satisfy the above conditional expression, it can be ensured that the focusing lens can sufficiently receive light emitted by the optical device, avoid that the focusing lens receives incomplete information or receives no information, facilitate the subsequent judgment of the adjustment direction, and also avoid traversing each direction until the spot is within the detection range of the second detection module during subsequent adjustment, thereby improving the adjustment efficiency and reducing the risk of interference.

[0217] As an example, the optical device can include an emitter device. The focal length F of the focusing lens can satisfy: F×tanθ Tx / A≥2, wherein θTx A is a preset resolution of the second detection module. In an example, 5≤F×tanθ Tx / A≤10. The preset installation accuracy of the transmitting device can be converted into displacement by using the focusing lens, and the accuracy requirement can be amplified, which is beneficial to the fast installation of the transmitting device and improves the installation efficiency of the transmitting device.

[0218] As an example, the optical device can include an analog device configured as a device designed based on the receiving device and similar to the transmitting device. The focal length F of the focusing lens can satisfy: ((F / f)×F×tanθ Rx ) / A≥2, where f is the focal length of the receiving device, and θ Rx is a preset installation accuracy of the receiving device, and A is a preset resolution of the second detection module. In an example, 5≤((F / f)×F×tanθ Rx ) / A≤10. The analog device and the focusing lens form a new optical system, which can convert the preset installation accuracy of the receiving device into displacement and amplify the accuracy requirement, for example, with a magnification of F / f, which is beneficial to the fast installation of the receiving device and improves the installation efficiency of the receiving device.

[0219] As an example, the optical device can include an analog device configured as a device designed based on the receiving device and similar to the transmitting device. The focal length F of the focusing lens can satisfy: ((F / f)×F×tanθ Tx / A≥2, and ((F / f)×F×tanθ Rx ) / A≥2, where f is the focal length of the receiving device, and θ Tx is a preset installation accuracy of the transmitting device, and θ Rx is a preset installation accuracy of the receiving device, and A is a preset resolution of the second detection module. In an example, 5≤F×tanθ Tx / A≤10, 5≤((F / f)×F×tanθ Rx ) / A≤10. When the transmitting device and the receiving device are installed at the same time, the installation efficiency and the installation accuracy of the transmitting device and the receiving device can be improved by controlling the above conditions.

[0220] The above description is only an example of the present application, and it should be noted that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should be considered as the protection scope of the present application.

Claims

1. An optical device assembly and adjustment system, characterized in that: include: A light splitting module, used for splitting the light emitted by the optical device into multiple light paths; as well as A plurality of detection modules are arranged on the plurality of optical paths and detect the light of the corresponding optical paths, wherein the light of each optical path has a different optical path from the optical device to the corresponding detection module. The optical splitting module includes n optical splitting elements arranged along the optical axis and forming n+1 optical paths, where n≥1. The multiple optical paths include a first optical path and a second optical path parallel to the optical axis. The multiple detection modules include a first detection module corresponding to the first optical path and a second detection module corresponding to the second optical path. The eccentricity value d1 of the optical device satisfies: d1=△h1- l 1 ×tanθ, θ is the tilt angle of the optical device, △h1 is the position offset of the light of the first optical path in the first detection module, l 1 is the optical path of the first optical path, The eccentricity value d2 of the optical device satisfies: d2=△h2- l 2 ×tanθ, △h2 is the position offset of the light of the second optical path in the second detection module, l 2 is the optical path of the second optical path; or, a focusing lens is provided on the second optical path, and the focusing lens is located between the spectroscopic element closest to the second detection module in the second optical path and the second detection module, and the inclination angle θ of the optical device satisfies: θ=arctan(△h2 / F), where F is the focal length of the focusing lens.

2. The adjustment system according to claim 1, characterized in that: The effective aperture of the light splitting element 1 satisfies: 1≤ 1 / (L1×tanθ max +d max +D)≤5, Wherein, L1 is the distance between the light splitting element and the optical device in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

3. The adjustment system according to claim 1, characterized in that: The effective aperture Φ1 of the first detection module satisfies: 1≤Φ1 / ( l 1 ×tanθ max +d max +D)≤5, in, l 1 is the optical path of the first optical path, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

4. The adjustment system according to claim 1, characterized in that: When no focusing lens is provided on the second optical path, the effective aperture Φ2 of the second detection module satisfies: 1≤Φ2 / ( l 2 ×tanθ max +d max +D)≤5, in, l 2 is the optical path of the second optical path, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

5. The adjustment system according to claim 1, characterized in that: When a focusing lens is provided on the second optical path, the effective aperture Φ2 of the second detection module satisfies: 1≤Φ2 / (F×tanθ max )≤5, Wherein, F is the focal length of the focusing lens, θ max is the maximum tilt angle of the optical device.

6. The adjustment system according to claim 1, characterized in that: The effective aperture of the focusing lens 2 satisfies: 1≤ 2 / (L2×tanθ max +d max +D)≤5, Wherein, L2 is the distance between the focusing lens and the optical device in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

7. The adjustment system according to claim 1, characterized in that: The adjustment system meets the following requirements: 0.2≤L1 / l 1 ≤0.8， Wherein, L1 is the distance between the light splitting element and the optical device in a direction parallel to the optical axis, l 1 is the optical path of the first optical path.

8. The adjustment system according to claim 1, characterized in that: The adjustment system meets the following requirements: L2>L 12 +( L 12 ×tanθ max +d max +D) / 2, Wherein, L2 is the distance between the focusing lens and the optical device in the direction parallel to the optical axis, L 12 is the distance between the light splitting element corresponding to the second light path and the optical device in a direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

9. The adjustment system according to claim 1, characterized in that: The optical device includes a transmitting device, and the assembly and adjustment system meets the following requirements: F×tanθ Tx / A≥2, Wherein, F is the focal length of the focusing lens, θ Tx is the preset adjustment accuracy of the emitting device, and A is the preset resolution of the second detection module.

10. The adjustment system according to claim 1, characterized in that: The optical device includes an analog device, which is configured as a device designed based on a receiving device and similar to a transmitting device, and the adjustment system meets the following requirements: ((F / f)×F×tanθ Rx ) / A≥2, Wherein, F is the focal length of the focusing lens, f is the focal length of the receiving device, θ Rx is the preset adjustment accuracy of the receiving device, and A is the preset resolution of the second detection module.

11. The adjustment system according to claim 1, characterized in that: The optical device includes a transmitting device and an analog device, wherein the analog device is configured as a device designed based on a receiving device and is similar to the transmitting device, and the adjustment system meets the following requirements: F×tanθ Tx / A≥2, and ((F / f)×F×tanθ Rx ) / A≥2, Wherein, F is the focal length of the focusing lens, f is the focal length of the receiving device, θ Tx is the preset adjustment accuracy of the transmitting device, θ Rx is the preset adjustment accuracy of the receiving device, and A is the preset resolution of the second detection module.

12. The adjustment system according to claim 1, characterized in that: There are multiple light splitting modules, and the multiple light splitting modules are respectively arranged on the multiple field angle light beams of the optical device, and each of the light splitting modules splits the corresponding field angle light beam into multiple light paths.

13. The adjustment system according to claim 1, characterized in that: The light is near-infrared light, and the detection module includes: A near-infrared response element, configured to convert the near-infrared light into visible light; a diffuse film, disposed on a side of the near-infrared response element away from the spectroscopic module, and diffusely reflecting the visible light; and The visible light imaging element is arranged on a side of the diffuse film away from the near infrared response element.

14. The adjustment system according to claim 13, characterized in that: The thickness K of the diffuse film satisfies: K / λ=10-500, where λ is the wavelength of the light.

15. A method for assembling an optical device, characterized in that: include: A light splitting module is provided on the light emitting path of the optical device, wherein the light splitting module splits the light emitted by the optical device into multiple light paths; as well as A detection module is provided on each of the optical paths, and the detection module detects the light of the corresponding optical path, wherein the optical path of the light of each optical path from the optical device to the corresponding detection module is different. Wherein, a light splitting module is provided on the light emitting path of the optical device, including: n light splitting elements are arranged along the optical axis on the light emitting path of the optical device, so that the light forms n+1 light paths after passing through the light splitting module, where n≥1; The multiple optical paths include a first optical path and a second optical path parallel to the optical axis, and the number of the detection modules is multiple, and the multiple detection modules include a first detection module corresponding to the first optical path and a second detection module corresponding to the second optical path; Wherein, the adjustment method further comprises: determining an eccentricity value and a tilt angle of the optical device according to a position offset of the light of the first optical path in the first detection module and a position offset of the light of the second optical path in the second detection module; and The optical device is adjusted based on the tilt angle and the decentering value of the optical device.

16. The adjustment method according to claim 15, characterized in that: A light splitting module is provided on the light emitting path of the optical device, comprising: A plurality of the light splitting modules are arranged on the light emitting path of the optical device. The plurality of light splitting modules are arranged on the multiple beams of viewing angle light of the optical device, and each light splitting module splits the corresponding viewing angle light into a plurality of light paths.

17. The adjustment method according to claim 15, characterized in that: The adjustment method further comprises: A focusing lens is provided on the second optical path, wherein the focusing lens is located between the beam splitting element closest to the second detection module and the second detection module in the second optical path.

18. The adjustment method according to claim 17, characterized in that: The decentering value of the optical device includes a first decentering value of the optical device; The method of determining the eccentricity and tilt angle of the optical device according to the position offset of the light of the first optical path in the first detection module and the position offset of the light of the second optical path in the second detection module includes: determining a tilt angle of the optical device according to a position offset of the light of the second optical path in the second detection module, wherein the tilt angle θ of the optical device satisfies: θ=arctan(Δh2 / F), wherein Δh2 is a position offset of the light of the second optical path in the second detection module, and F is a focal length of the focusing lens; and The first eccentricity of the optical device is determined according to the tilt angle of the optical device and the position offset of the light of the first optical path in the first detection module. The first eccentricity d1 of the optical device satisfies: d1=△h1- l 1 ×tanθ, where △h1 is the position offset of the light of the first optical path in the first detection module, l 1 is the optical path of the first optical path; The step of adjusting the optical device based on the tilt angle and eccentricity of the optical device includes: The optical device is adjusted based on the tilt angle of the optical device and the first eccentricity value.

19. The adjustment method according to claim 18, characterized in that: Adjusting the optical device based on the tilt angle and the first eccentricity value of the optical device includes: Adjusting the optical device based on the tilt angle of the optical device; Adjusting the optical device based on a first eccentricity value of the optical device; and Obtaining a second eccentricity value of the optical device after the second adjustment, and determining whether the second eccentricity value of the optical device after the second adjustment is within a preset range, The second eccentricity value d2' of the optical device after the secondary adjustment satisfies d2'=L2×tanθ', wherein θ'=arctan(△h2' / F), θ' is the inclination angle of the optical device after the secondary adjustment, △h2' is the position offset of the light in the second optical path in the optical device after the secondary adjustment in the second detection module, F is the focal length of the focusing lens, and L2 is the distance between the focusing lens and the optical device in a direction parallel to the optical axis.

20. The adjustment method according to claim 18, characterized in that: Adjusting the optical device based on the tilt angle of the optical device includes: Dividing the detection target surface of the second detection module into a plurality of areas according to the aberration of the focusing lens, wherein different areas have different angle compensation amounts; determining an angle compensation amount of the optical device according to the coordinates of an imaging point of the light of the second optical path on the second detection module; and The optical device is adjusted based on the angle compensation amount and the tilt angle of the optical device.

21. The adjustment method according to claim 15, characterized in that: Determining the eccentricity and the tilt angle of the optical device according to the position offset of the light of the first optical path in the first detection module and the position offset of the light of the second optical path in the second detection module includes: According to the position offset of the light of the first optical path in the first detection module and the optical path of the first optical path, the equation d=△h1- l 1 ×tanθ, where △h1 is the position offset of the light of the first optical path in the first detection module, l 1 is the optical path of the first optical path, d is the eccentricity value of the optical device, and θ is the tilt angle of the optical device; According to the position offset of the light of the second optical path in the second detection module and the optical path of the second optical path, the equation 2 is obtained: d=△h2- l 2 ×tanθ, where △h2 is the position offset of the light of the second optical path in the second detection module, l 2 is the optical length of the second optical path; and The decentering value and the tilt angle of the optical device are calculated by combining the equation 1 and the equation 2.

22. The adjustment method according to claim 15 or 17, characterized in that: The effective aperture of the light splitting element 1 satisfies: 1≤ 1 / (L1×tanθ max +d max +D)≤5, Wherein, L1 is the distance between the light splitting element and the optical device in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

23. The adjustment method according to claim 15 or 17, characterized in that: The effective aperture Φ1 of the first detection module satisfies: 1≤Φ1 / ( l 1 ×tanθ max +d max +D)≤5, in, l 1 is the optical path of the first optical path, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

24. The adjustment method according to claim 15, characterized in that: The effective aperture Φ2 of the second detection module satisfies: 1≤Φ2 / ( l 2 ×tanθ max +d max +D)≤5, in, l 2 is the optical path of the second optical path, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

25. The adjustment method according to claim 17, characterized in that: The effective aperture Φ2 of the second detection module satisfies: 1≤Φ2 / (F×tanθ max )≤5, Wherein, F is the focal length of the focusing lens, θ max is the maximum tilt angle of the optical device.

26. The adjustment method according to claim 17, characterized in that: The effective aperture of the focusing lens 2 satisfies: 1≤ 2 / (L2×tanθ max +d max +D)≤5, Wherein, L2 is the distance between the focusing lens and the optical device in the direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

27. The adjustment method according to claim 15 or 17, characterized in that: The adjustment method further comprises: Adjust the position of the light splitting element so that the light splitting element satisfies: 0.2≤L1 / l 1 ≤0.8， Wherein, L1 is the distance between the light splitting element and the optical device in a direction parallel to the optical axis, l 1 is the optical path of the first optical path.

28. The adjustment method according to claim 17, characterized in that: The adjustment method further comprises: Adjust the position of the focusing lens so that the focusing lens satisfies: L2>L 12 +( L 12 ×tanθ max +d max +D) / 2, Wherein, L2 is the distance between the focusing lens and the optical device in the direction parallel to the optical axis, L 12 is the distance between the light splitting element corresponding to the second light path and the optical device in a direction parallel to the optical axis, θ max is the maximum tilt angle of the optical device, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device.

29. The adjustment method according to claim 17, characterized in that: The optical device includes a transmitting device, and the focal length F of the focusing lens satisfies: F×tanθ Tx / A≥2, Among them, θ Tx is the preset adjustment accuracy of the emitting device, and A is the preset resolution of the second detection module.

30. The adjustment method according to claim 17, characterized in that: The optical device includes an analog device, which is configured as a device designed based on a receiving device and similar to a transmitting device, and the focal length F of the focusing lens satisfies: ((F / f)×F×tanθ Rx ) / A≥2, Where, f is the focal length of the receiving device, θ Rx is the preset adjustment accuracy of the receiving device, and A is the preset resolution of the second detection module.

31. The adjustment method according to claim 17, characterized in that: The optical device includes a transmitting device and an analog device, wherein the analog device is configured as a device designed based on a receiving device and similar to the transmitting device, and the focal length F of the focusing lens satisfies: F×tanθ Tx / A≥2, and ((F / f)×F×tanθ Rx ) / A≥2, Where, f is the focal length of the receiving device, θ Tx is the preset adjustment accuracy of the transmitting device, θ Rx is the preset adjustment accuracy of the receiving device, and A is the preset resolution of the second detection module.

32. The adjustment method according to any one of claims 15 to 17, characterized in that: The light is near-infrared light, and a detection module is provided on each of the light paths, including: A near-infrared response element, a diffuse film and a visible light imaging element are sequentially arranged on each of the optical paths, wherein the near-infrared response element converts the near-infrared light into visible light, and the diffuse film diffusely reflects the visible light.

33. The adjustment method according to claim 32, characterized in that: The thickness K of the diffuse film satisfies: K / λ=10-500, where λ is the wavelength of the light.

Images