Assembly and adjustment system and assembly and adjustment method of optical device

Abstract

The invention discloses an installation and adjustment system and method for an optical device, and the system comprises a light splitting module and a plurality of detection modules, and the light splitting module is used for dividing the light emitted by the optical device into a plurality of light paths; the plurality of detection modules are respectively arranged on the plurality of light paths and are used for detecting the light of the corresponding light paths, and the light of each light path is transmitted to the corresponding detection module by different optical paths from the optical device. By using the adjustment system provided by the invention, the detection of a plurality of focusing distances of the optical device can be realized at the same time, the repeated adjustment of the plurality of focusing distances is not needed, and the adjustment efficiency and the adjustment precision are improved.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to an assembly and adjustment system and an assembly and adjustment method for an optical device. Background Art

[0002] For optical transceiver devices, the adjustment of transmitting devices and receiving devices is a difficult point and bottleneck in the production process. During the adjustment of transmitting devices and receiving devices, considering the optical path design characteristics of optical devices, it is necessary to adjust multiple focal distances of optical devices. For example, the first focal distance of the optical device is adjusted first, and after the adjustment of the first focal distance is completed, the second focal distance, the third focal distance and other focal distances are adjusted in turn. However, there is a coupling relationship between the different focal distances of the optical device, and the different focal distances need to be adjusted repeatedly, which will make the adjustment process of the optical device more complicated, and the adjustment accuracy and consistency are poor. Summary of the invention

[0003] The embodiments of the present application provide an optical device assembly and adjustment system and an optical device assembly and adjustment method that can at least partially solve at least one of the above-mentioned shortcomings or other shortcomings in the prior art.

[0004] A first aspect of the present application provides an assembly and adjustment system for an optical device, which includes a spectrometer module and multiple detection modules. The spectrometer module is used to split the light emitted by the optical device into multiple optical paths; the multiple detection modules are arranged on the multiple optical paths and detect the light of the corresponding optical paths, wherein the optical path of the light of each optical path from the optical device to the corresponding detection module is different.

[0005] According to an exemplary embodiment of the present application, the light splitting module includes n light splitting elements arranged along the optical axis and forming n+1 light paths, where n≥1.

[0006] According to an exemplary embodiment of the present application, the multiple optical paths include a first optical path and a second optical path parallel to the optical axis, 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.

[0007] According to an exemplary embodiment of the present application, the adjustment system further includes a focusing lens, which is located on the second optical path and is arranged between the beam splitting element corresponding to the second optical path and the second detection module.

[0008] According to an exemplary embodiment of the present application, the effective aperture of the light splitting element Satisfy: 1≤ 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 maxis the maximum eccentricity of the optical device, and D is the spot size of the optical device.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] According to an exemplary embodiment of the present application, the effective aperture of the focusing lens 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.

[0013] According to an exemplary embodiment of the present application, the eccentricity value d1 of the optical device satisfies: d1=△h1-l1×tanθ, wherein θ is the inclination angle of the optical device, △h1 is the position offset of the light of the first optical path in the first detection module, and l1 is the optical path of the first optical path.

[0014] According to an exemplary embodiment of the present application, the eccentricity value d2 of the optical device satisfies: d2=△h2-l2×tanθ, wherein θ is the inclination angle of the optical device, △h2 is the position offset of the light of the second optical path in the second detection module, and l2 is the optical path of the second optical path.

[0015] According to an exemplary embodiment of the present application, the eccentricity value d2 of the optical device satisfies: d2=L2×tanθ, where θ=arctan(△h2 / F), where θ is the inclination angle of the optical device, △h2 is the position offset of the light in the second optical path 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.

[0016] According to an exemplary embodiment of the present application, the adjustment system satisfies: 0.2≤L1 / l1≤0.8, wherein L1 is the distance between the beam splitter element and the optical device in a direction parallel to the optical axis, and l1 is the optical path of the first optical path.

[0017] According to an exemplary embodiment of the present application, the adjustment system satisfies: L2>L 12 +(L 12 ×tanθ max +d max +D) / 2, where 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 beam splitter element corresponding to the second optical 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.

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

[0019] According to an exemplary embodiment of the present application, 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 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 adjustment accuracy of the receiving device, and A is the preset resolution of the second detection module.

[0020] According to an exemplary embodiment of the present application, the optical device includes a transmitting device and an analog device, wherein the analog device is configured as a device designed based on the receiving device and similar to the transmitting device, and the adjustment 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 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.

[0021] According to an exemplary embodiment of the present application, there are multiple light splitting modules, which are disposed on multiple field angle light beams of the optical device, and each light splitting module splits the corresponding field angle light beam into multiple light paths.

[0022] According to an exemplary embodiment of the present application, the light is near-infrared light, and the detection module includes 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 a side of the near-infrared response element away from the spectroscopic module, and diffusely reflects the visible light; the visible light camera element is arranged on a side of the diffuse film away from the near-infrared response element.

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

[0024] The second aspect of the present application provides a method for assembling an optical device, which includes: setting a spectrometer module on the light emitting path of the optical device, the spectrometer module splits the light emitted by the optical device into multiple light paths; and setting 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 exemplary embodiment of the present application, setting a spectroscopic module on the light emitting path of the optical device includes: setting n spectroscopic 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 spectroscopic module, n≥1.

[0026] According to an exemplary embodiment of the present application, setting a spectrometer module on the light emitting path of an optical device includes: setting a plurality of spectrometer modules on the light emitting path of the optical device, the plurality of spectrometer modules are separately set on a plurality of field of view angle light beams of the optical device, and each spectrometer module splits the corresponding field of view angle light beams into a plurality of light paths.

[0027] According to an exemplary embodiment of the present application, the multiple optical paths include a first optical path and a second optical path parallel to the optical axis, 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.

[0028] According to an exemplary embodiment of the present application, the adjustment method further includes: providing a focusing lens on the second optical path, wherein the focusing lens is located between the beam splitting element corresponding to the second optical path and the second detection module.

[0029] According to an exemplary embodiment of the present application, the adjustment method also includes: determining the inclination angle of the optical device according to the position offset of the light of the second optical path in the second detection module, the inclination angle θ of the optical device satisfies: θ = arctan (△h2 / F), wherein △h2 is the position offset of the light of the second optical path in 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 inclination 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 value d1 of the optical device satisfies: d1 = △h1-l1×tanθ, wherein △h1 is the position offset of the light of the first optical path in the first detection module, and l1 is the optical path of the first optical path; and adjusting the optical device based on the inclination angle of the optical device and the first eccentricity value.

[0030] According to an exemplary embodiment of the present application, adjusting the optical device based on the inclination angle and the first eccentricity value of the optical device includes: adjusting the optical device based on the inclination angle of the optical device; adjusting 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 second adjustment, and determining whether the second eccentricity value of the optical device after the second adjustment is within a preset range, wherein the second eccentricity value d2' of the optical device after the second adjustment satisfies d2'=L2×tanθ', wherein θ'=arctan(△h2' / F), θ' is the inclination angle of the optical device after the second adjustment, △h2' is the position offset of the light of the second optical path in the optical device after the second 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.

[0031] According to an exemplary embodiment of the present application, 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 multiple areas according to the aberration of the focusing lens, and different areas have different angle compensation amounts; determining the angle compensation amount of the optical device according to the coordinates of the imaging point of the light of the second optical path in the second detection module; and adjusting the optical device based on the angle compensation amount and the tilt angle of the optical device.

[0032] According to an exemplary embodiment of the present application, the adjustment method also includes: determining the eccentricity value and the tilt angle of the optical device based on 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; and adjusting 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 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 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 spectroscopic element, and making the spectroscopic element satisfy: 0.2≤L1 / l1≤0.8, wherein L1 is the distance between the spectroscopic 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 exemplary embodiment of the present application, the adjustment method further includes: adjusting the position of the focusing lens so that the focusing lens satisfies: L2>L 12 +(L 12 ×tanθ max +d max +D) / 2, where 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 beam splitter element corresponding to the second optical 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 exemplary embodiment of the present application, the optical device includes a transmitting device, and the focal length F of the focusing lens satisfies: F×tanθ Tx / A≥2, where 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 exemplary embodiment of the present application, 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.

[0042] According to an exemplary embodiment of the present application, the optical device includes a transmitting device and an analog device, the analog device is configured as a device designed based on the 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.

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

[0044] According to an exemplary embodiment of the present application, the thickness K of the diffuse film satisfies: K / λ=10-500, wherein λ is the wavelength of light.

[0045] The optical device assembly and adjustment system provided in the present application includes a spectroscopic module and multiple detection modules. The spectroscopic module can divide the light emitted by the optical device into multiple light paths, each light path is correspondingly provided with a detection module, and the light of each light path propagates from the optical device to the corresponding detection module at different optical paths. The above-mentioned assembly and adjustment system can simultaneously realize the detection of multiple focus distances of the optical device, and there is no need to repeatedly assemble and adjust multiple focus distances, thereby improving the assembly and adjustment efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Other features, purposes and advantages of the embodiments of the present application will become more apparent by reading the detailed description of the non-limiting embodiments made with reference to the following drawings, in which:

[0047] Figure 1 is a schematic structural diagram of an optical device assembly and adjustment system according to an embodiment of the present application;

[0048] Figure 2 is a schematic structural diagram of an optical device assembly and adjustment system according to an embodiment of the present application;

[0049] Figure 3 A schematic diagram of an optical path for limited long-distance detection of an optical device according to an embodiment of the present application;

[0050] Figure 4 A schematic diagram of an optical path for infinite distance detection of an optical device according to an embodiment of the present application;

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

[0052] Figure 6 A schematic diagram of imaging points of light at a limited distance according to an embodiment of the present application;

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

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

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

[0056] Fig.10 is a schematic structural diagram of an optical device assembly and adjustment system according to an embodiment of the present application;

[0057] Fig.11 is a schematic structural diagram of an optical device assembly and adjustment system according to an embodiment of the present application;

[0058] Fig.12 A schematic diagram of an optical path for adjusting an analog device using an adjustment system according to an embodiment of the present application;

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

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

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

[0062] Fig.16 It is a schematic flow chart of an optical device assembly method according to an embodiment of the present application. DETAILED DESCRIPTION

[0063] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same 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 in this specification, the expressions of first, second, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Therefore, without departing from the teaching of the present application, the first optical path discussed below can be referred to as the second optical path.

[0065] In the drawings, the thickness, size and shape of each component may be slightly exaggerated for convenience of explanation. The drawings are only examples and are not drawn strictly to scale.

[0066] It should also be understood that the terms "comprising", "including", "having" and / or "configured with", when used in this specification, indicate the presence of stated features, elements and / or components, but do not exclude the presence of one or more other features, elements, components and / or combinations thereof. In addition, the term "exemplarily" is intended to refer to an example or illustration.

[0067] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this application have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be understood to have the same meaning as their meaning in the context of the relevant technology, and should not be interpreted in an idealized or overly formal sense, unless explicitly defined in this application.

[0068] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0069] When adjusting optical devices such as transmitting devices and receiving devices, it is necessary to adjust multiple focal distances and / or multiple field of view angles of the optical devices in consideration of the optical path design characteristics of the optical devices. Through the traditional adjustment system, only a single focal distance and / or a single field of view angle can be adjusted. After the adjustment of the focal distance and / or the field of view angle is completed, other focal distances and / or other field of view angles can be adjusted in sequence.

[0070] However, there is a coupling relationship between different focal distances or different field of view angles of the optical device. After a certain focal distance or field of view angle is adjusted, it is necessary to confirm other focal distances or other field of view angles. If it is confirmed that the adjustment of other focal distances or other field of view angles does not meet the requirements, it is necessary to adjust the focal distances or field of view angles that do not meet the requirements again, which will make the entire adjustment process of the optical device more complicated, and different focal distances or different field of view angles need to be adjusted repeatedly, affecting the adjustment efficiency of the optical device. In addition, when the optical device is adjusted using the above adjustment system, the adjustment accuracy is also low.

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

[0072] Figure 1 and Figure 2The schematic diagrams of the structure of the optical device assembly system 100 according to the exemplary embodiment of the present application are respectively shown. The optical device 130 may be, for example, a transmitting device and / or an analog device similar to the transmitting device designed based on the receiving device. The transmitting device may be, for example, a transmitting end of a laser radar system, and the receiving device may be, for example, a receiving end of a laser radar system. It should be understood that the optical device 130 may also be other devices, and the present application does not specifically limit this.

[0073] refer to Figure 1 and Figure 2 The assembly and adjustment system 100 includes a spectroscopic module 110 and a plurality of detection modules 120. The spectroscopic module 110 is used to split the light emitted by the optical device 130 into a plurality of optical paths. The plurality of detection modules 120 are arranged on a plurality of optical paths, and detect the light of the corresponding optical paths. In other words, a detection module 120 is arranged on each optical path. The optical path of the light from the optical device 130 to the corresponding detection module 120 is different. The optical device 130 may include at least one of a transmitting device and an analog device, wherein the analog device is configured as a device designed according to a receiving device and similar to a transmitting device.

[0074] The light emitted by the optical device 130 can be divided into multiple light paths by using the light splitting module 110, each light path is correspondingly provided with a detection module 120, and the optical path of each light path is different. Based on this, the adjustment system 100 provided by the present application can simultaneously detect multiple focus distances of the optical device 130, and there is no need to repeatedly adjust the multiple focus distances, thereby improving the adjustment efficiency and adjustment accuracy. The focus distance mentioned herein is actually the optical path of the corresponding light path, and the optical path of each light path refers to the product of the distance that the light of each light path propagates 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 may include n light splitting elements arranged along the optical axis of the optical device 130, and form n+1 optical paths, where n≥1. The light splitting element may be, for example, a cubic light splitter, a flat light splitter, or other forms of light splitting devices. Figure 1 and Figure 2 As shown, the light splitting module 110 may include a first light splitting element 111 and a second light splitting element 112. The light emitted by the optical device 130 forms three light paths after passing through the light splitting module 110. At this time, n = 2. It should be understood that the number of light splitting elements included in the light splitting module 110 is only exemplary, and the present application does not impose any specific limitation on this.

[0076] The plurality of optical paths may include a first optical path and a second optical path. For light in the first optical path, the propagation path of the light will be changed after the light passes through the corresponding beam splitter element. For example, the propagation path of the light after passing through the corresponding beam splitter element may be perpendicular to the optical axis of the optical device 130. For light in the second optical path, the propagation path of the light will not be changed after the light passes through the corresponding beam splitter element. That is, the light in the second optical path always propagates in a direction parallel to the optical axis, that is, the second optical path is parallel to the optical axis. As an example, Figure 1 and Figure 2 As shown, the light emitted by the optical device 130 forms 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 and depends on the number of light splitting elements included in the light splitting module 110, and the present application does not impose any specific limitation on this.

[0077] The plurality of detection modules 120 may include a first detection module 121 and a second detection module 122. The first detection module 121 corresponds to the first optical path. The second detection module 122 corresponds to the second optical path. Figure 1 and Figure 2 As shown, the plurality of detection modules 120 include 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 and depends on the number of optical paths, and the present application does not impose any specific limitation on this.

[0078] Continue to refer Figure 1 The adjustment system 100 may further include a focusing lens 140. The focusing lens 140 may be located on the second optical path and disposed between the beam splitter element corresponding to the second optical path and the second detection module 122. By arranging the focusing lens 140 on the second optical path, it is possible to detect the infinite distance of the optical device 130. As an example, the focusing lens 140 may be disposed between the second beam splitter element 112 and the second detection module 122.

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

[0080] Continue to refer Figure 2 , the adjustment system 100 does not include the focusing lens 140, which means Figure 2The first optical path and the second optical path in the illustrated adjustment system 100 are both used to detect the optical device 130 at a limited distance, that is, both are used to detect the optical device 130 in the near field. Figure 2 The illustrated alignment system 100 can simultaneously implement alignment of the optical device 130 at different limited distances, thereby improving alignment efficiency and alignment accuracy.

[0081] Figure 3 FIG. 1 is a schematic diagram showing an optical path for limited long-distance detection of an optical device 130 according to an exemplary embodiment of the present application. Figure 4 FIG. 1 is a schematic diagram showing an optical path for infinite distance detection of an optical device 130 according to an exemplary embodiment of the present application.

[0082] refer to Figure 3 , the solid line area represents the ideal position of the optical device 130, the dotted line area represents the actual position of the optical device 130, d represents the eccentricity of the optical device 130, θ represents the tilt angle of the optical device 130, l represents the optical path length, and △h represents the position offset of the light of the optical path in the detection module 120. For the optical path used for finite distance detection, the calculation formula of the eccentricity d of the optical device 130 is:

[0083] d = △hl × tanθ Formula (1)

[0084] When Δh and l are known, θ and d can be obtained by combining any two equations. In other words, θ and d can be obtained by using formula (1) at any two finite distances. After obtaining θ and d, the optical device 130 can be adjusted by adjusting the tilt angle θ and the eccentricity d of the optical device 130.

[0085] It should be understood that the tilt angle θ of the optical device 130 refers to any tilt angle of the optical device 130 in the X direction, the Y direction, and the Z direction, or various combinations thereof, and the eccentricity value d of the optical device 130 refers to any eccentricity value of the optical device 130 in the X direction, the Y direction, and the Z direction, or various combinations thereof. 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 separately.

[0086] refer to Figure 4, the solid line area represents the ideal position of the optical device 130, the dotted 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 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 in the detection module 120. For the optical path used for infinite distance detection, the calculation formula of the position offset △h of the light of the optical path in the detection module 120 is:

[0087] △h=F×tanθ Formula (2)

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

[0089] d=L×tanθ Formula (3)

[0090] After obtaining θ, d can be directly calculated based on formula (3).

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

[0092] refer to Figure 1 When the first optical path is used for finite distance detection of the optical device 130, the eccentricity value d1 of the optical device 130 can be obtained using formula (1), where d1 is the eccentricity value corresponding to the first optical path; when the second optical path is used for infinite distance detection of the optical device 130, the eccentricity value d2 of the optical device 130 can be obtained 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 may satisfy: d1=△h1-l1×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 in the first detection module 121, and l1 is the optical path of the first optical path.

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

[0095] refer to Figure 2 When both the first optical path and the second optical path are used for limited long-distance detection of the optical device 130, the eccentricity value d1 and the eccentricity value d2 of the optical device 130 can be obtained using formula (1), where d1 is the eccentricity value corresponding to the first optical path, and d2 is the eccentricity value corresponding to the second optical path.

[0096] As an example, the eccentricity value d1 of the optical device 130 may satisfy: d1=△h1-l1×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 in the first detection module 121, and l1 is the optical path of the first optical path.

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

[0098] When calculating the eccentricity value and / or tilt angle of the optical device 130, the coordinate system where the multiple light paths are located is normalized to obtain the following: Figure 5 The optical path coordinate system shown. Figure 6 , the reference coordinate of the light of the finite light path on the detection module is point O, and the coordinate of the imaging point of the light of the finite light path on the detection module is (X1, Z1). Figure 7 The reference coordinate of the light of the infinite optical path on the detection module is point O', and the coordinate of the imaging point of the light of the infinite optical path on the detection module is (X2, Z2).

[0099] For light with an infinite optical path, the deviation of the image point coordinates is only related to the tilt angle of the optical device, and has nothing to do with the eccentricity of the optical device (or the effect is very small and can be basically ignored in actual engineering calculations). Figure 5, the tilt angle of the optical device can be decomposed into three components, which are the rotations around the X-axis, Y-axis, and Z-axis, respectively, denoted as Tilt_X, Tilt_Y, and Tilt_Z, where Tilt_X will cause the deviation of the imaging point coordinates in the Z direction, Tilt_Z will cause the deviation of the imaging point coordinates in the X direction, and Tilt_Y will not cause any deviation of the imaging point coordinates. Specifically, Tilt_X = arctan(Z2 / F), Tilt_Z = arctan(X2 / F). After Tilt_X rotates by -arctan(Z2 / F) angle and Tilt_Z rotates by -arctan(X2 / F) angle, the imaging point coordinates of the light in the infinite optical path can be adjusted to the reference coordinate point O'. It should be noted that the quadrant position of the imaging point coordinates of the light determines the positive and negative angles. Tilt_X is + for pitch upward and - for pitch downward; Tilt_Z is + to the right and - to the left.

[0100] For light in a finite optical path, the deviation of the image point coordinates is not only related 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, namely the movement of the X-axis, Y-axis, and Z-axis, recorded as △X, △Y, and △Z. Among them, △X will cause the deviation of the image point coordinates in the X direction, △Z will cause the deviation of the image point coordinates in the Z direction, and △Y will cause a slight change in the optical path of the finite optical path, but the magnitude is relatively small and will not have a significant impact on the image point coordinates, so it is generally not considered specially.

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

[0102] When assembling and adjusting the optical device, the above-mentioned method of adjusting the infinite distance and the finite distance at the same time can be adopted, or the method of first adjusting the tilt angle of the infinite distance and then adjusting the eccentricity of the finite distance can be adopted. By decoupling the finite distance and infinite distance adjustment steps, and then combining the method of internal decoupling of the finite distance and infinite distance, a unique assembly adjustment can be obtained, thereby realizing fast and accurate assembly and adjustment of the optical device, and improving the assembly and adjustment accuracy and efficiency.

[0103] The focusing lens 140 usually has aberrations, for example, the central area has small aberrations, and the edge area has large aberrations. This will cause the imaging conditions in the non-central area of ​​the focusing lens 140 to deviate from the results calculated according to the ideal lens model, that is, the inclination angle calculated according to the theory deviates from the inclination angle that actually needs to be adjusted. Multiple iterations are required to gradually narrow it down to within the standard range, and the adjustment efficiency is low.

[0104] The above-mentioned aberration correction method is usually to obtain the ideal value and actual value of the calibration point pixel by shooting the calibration plate image (usually a chessboard) at different viewing angles, and generate a coordinate mapping table at the same time, and then use the coordinate mapping table for the correction program of the image with aberration, and finally obtain an aberration-free image. However, since the focusing lens 140 is generally a single lens, its own imaging quality is limited, and the clarity of the captured standard plate image is low, resulting in low accuracy in capturing the standard plate corners, and the final correction effect is poor and cannot meet the requirements.

[0105] Assume that the angle adjustment accuracy requirement of the infinite optical path is θ adj , and the light emitted by the optical device 130 is vertically incident on the focusing lens 140. When the infinite distance adjustment of the optical device 130 is performed, the Tilt_X and Tilt_Z directions are adjusted according to θ adj Perform step adjustment (i.e., make the imaging point position of the light of the infinite optical path move in the Z coordinate direction and the X coordinate direction), and record the actual imaging point coordinates of the light of the infinite optical path after each adjustment, until the imaging point of the light of the infinite optical path exceeds the detection target surface of the second detection module 122. Compare the actual imaging point coordinates of the light of the infinite optical path with the theoretical imaging point coordinates, and divide the detection target surface into multiple areas according to the difference level, wherein the theoretical imaging point coordinates are obtained by the ideal lens. Each area corresponds to a difference level, and the difference between adjacent levels is a difference, and a difference can be, for example, θ adj / 5 or θ adj / 2, it should be understood that the specific value of a difference can be adjusted according to actual needs, but a difference must not exceed θ adj / 2. The number of regions of the detection target surface can be determined according to the specific value of the difference amount, and different regions have different angle compensation amounts △θ.

[0106] refer to Figure 8, the detection target surface of the second detection module 122 may include a first area I, a second area II and a third area III, and the first area I, the second area II and the third area III are arranged in sequence from the center to the edge of the detection target surface. The angle compensation amount of the first area I is △θ1, the angle compensation amount of the second area II is △θ2, and the angle compensation amount of the third area III is △θ3, and △θ1<△θ2<△θ3. △θ1 can be 0. The angle compensation amount of the optical device 130 can be determined according to 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 area 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 area 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 area 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 the infinite distance adjustment of the optical device 130 can be achieved.

[0107] The parameter settings of the light splitting 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 beam splitter element 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 light splitting elements may include but are not limited to the first light splitting element 111 and the second light splitting element 112. By making the effective aperture of each light splitting element satisfy the above conditional formula, it can be ensured that each light splitting element can fully receive the light emitted by the optical device 130, avoiding the light splitting element receiving incomplete information or receiving no information, facilitating the subsequent determination of the system's adjustment direction, and avoiding traversing various directions until the light spot is within the detection range of the detection module 120 during subsequent adjustment, thereby improving the adjustment efficiency and 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 making the effective aperture of each first detection module 121 satisfy the above conditional formula, it can be ensured that each first detection module 121 can fully receive the light corresponding to the first optical path, avoiding the first detection module 121 receiving incomplete information or receiving no information, facilitating the determination of the system adjustment direction, and avoiding traversing various directions until the light spot is within the detection range of the first detection module 121 during adjustment, thereby improving the adjustment efficiency and 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 making the effective aperture of the second detection module 122 satisfy the above conditional expression, it can be ensured that the second detection module 122 can fully receive the light corresponding to the second optical path, so as to avoid the second detection module 122 receiving incomplete information or receiving no information, which is convenient for judging the adjustment direction of the system, and can also avoid traversing various directions until the light spot is within the detection range of the second detection module 122 during adjustment, thereby improving the adjustment efficiency and 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-mentioned conditional expression, it can be ensured that the focusing lens 140 can fully receive the light emitted by the optical device 130, thereby preventing the focusing lens 140 from receiving incomplete information or receiving no information, thereby facilitating the subsequent judgment of the system's adjustment direction, and also avoiding traversing various directions during subsequent adjustment until the light spot is within the detection range of the second detection module 122, thereby improving the adjustment efficiency and reducing the risk of interference.

[0112] As an example, Figure 2 As shown, 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 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≤Φ2 / (l2×tanθ max +d max +D)≤2. By making the effective aperture of the second detection module 122 satisfy the above conditional formula, it can be ensured that the second detection module 122 can fully receive the light corresponding to the second optical path, so as to avoid the second detection module 122 receiving incomplete information or receiving no information, which is convenient for judging the adjustment direction of the system, and can also avoid traversing various directions until the light spot is within the detection range of the second detection module 122 during adjustment, thereby improving the adjustment efficiency and reducing the risk of interference.

[0113] As an example, Figure 1 and Figure 2 As shown, the adjustment system 100 can satisfy: 0.2≤L1 / l1≤0.8, wherein L1 is the distance between the beam splitter and the optical device 130 in a direction parallel to the optical axis, and l1 is the optical path of the first optical path. In one example, 0.33≤L1 / l1≤0.67. The effective aperture required by the beam splitter is linearly positively correlated with the distance between the beam splitter and the optical device 130 in a direction parallel to the optical axis, that is, the farther the beam splitter is from the optical device 130 in a direction parallel to the optical axis, the larger the effective aperture required by the beam splitter. By controlling the above conditional expression, the beam splitter can be placed in a suitable position, which is conducive to selecting a beam splitter with a suitable effective aperture to ensure that the beam splitter fully receives the light emitted by the optical device 130 while reducing costs.

[0114] As an example, Figure 1 As shown, the adjustment system 100 can satisfy: L2>L 12 +(L 12 ×tanθ max +dmax + D) / 2, where L2 is the distance between the focusing lens 140 and the optical device 130 in a direction parallel to the optical axis, and L 12 is the distance between the light splitting element corresponding to the second light path 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 value of the optical device 130, and D is the spot size of the optical device 130. The effective aperture required by the focusing lens 140 is linearly positively correlated with the distance of the focusing lens 140 from the optical device 130 in the direction parallel to the optical axis, that is, the farther the focusing lens 140 is from the optical device 130 in the direction parallel to the optical axis, the larger the effective aperture required by the focusing lens 140. By controlling the above conditional expression, the focusing lens 140 can be placed in a suitable position, which is conducive to selecting a focusing lens 140 with a suitable effective aperture, so as to ensure that the focusing lens 140 fully receives the light emitted by the optical device 130 while reducing the cost.

[0115] As an example, the optical device 130 may include a transmitting device. The alignment system 100 may satisfy: F×tanθ Tx / A≥2, where F is the focal length of the focusing lens 140, θ Tx is the preset adjustment accuracy of the transmitting device, and A is the preset resolution of the second detection module 122. In one example, 5≤F×tanθ Tx / A≤10. The focusing lens 140 can be used to convert the preset adjustment accuracy of the transmitting device into displacement, and realize the amplification processing of the accuracy requirement, which is conducive to realizing the rapid adjustment of the transmitting device and improving the adjustment efficiency of the transmitting device.

[0116] As an example, the optical device 130 may include an analog device, which is configured as a device designed based on a receiving device and similar to a transmitting device. The alignment system 100 may satisfy: ((F / f)×F×tanθ Rx ) / A≥2, where F is the focal length of the focusing lens 140, 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 122. In one example, 5≤((F / f)×F×tanθ Rx ) / A≤10. The analog device and the focusing lens 140 are combined to form a new optical system, which can convert the preset adjustment accuracy of the receiving device into displacement and realize the amplification processing of the accuracy requirement. The amplification ratio can be, for example, F / f, which is conducive to realizing the rapid adjustment of the receiving device and improving the adjustment efficiency of the receiving device.

[0117] As an example, the optical device 130 may include a transmitting device and an analog device, wherein the analog device is configured as a device designed based on the receiving device and similar to the transmitting device. The alignment system 100 may satisfy: F×tanθ Tx / A≥2, and ((F / f)×F×tanθ Rx ) / A≥2, where F is the focal length of the focusing lens 140, 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 122. In one example, 5≤F×tanθ Tx / A≤10,5≤((F / f)×F×tanθ Rx ) / A≤10. When the above-mentioned adjustment system 100 is used to adjust the transmitting device and the receiving device at the same time, the adjustment efficiency and adjustment accuracy of the transmitting device and the receiving device can be improved by controlling the above-mentioned conditional expression.

[0118] Fig. 9 FIG. 1 is a schematic diagram showing a structure of a detection module 120 according to an exemplary embodiment of the present application. The detection module 120 may include a first detection module 121 and a second detection module 122 .

[0119] The light emitted by the optical device 130 may be near-infrared light. The detection module 120 may 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 at the receiving side of the detection module 120, and converts the near-infrared light into visible light. The diffuse film 1202 is disposed on a side of the near-infrared response element 1201 away from the spectroscopic module 110, and diffusely reflects the visible light. The visible light camera element 1203 is disposed on a side of the diffuse film 1202 away from the near-infrared response element 1201, and detects the visible light after diffuse reflection. The visible light camera element 1203 may 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 directionality, and its directionality is related to the incident direction of the near-infrared light. This will cause part of the visible light to exceed the light receiving range of the visible light imaging element 1203, resulting in the visible light imaging element 1203 being unable to capture the part of the light that exceeds the light receiving range. The brightness of the edge light spot on the visible light imaging element 1203 is dim and cannot truly reflect the intensity of the light spot.

[0121] By setting a diffuse film 1202 on the light-emitting side of the near-infrared response element 1202, the diffuse film 1202 can be used to convert light with a certain directionality into diffusely reflected light, so that the visible light can be more easily received by the visible light imaging element 1203. At the same time, 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, ensuring that the visible light imaging element 1203 can truly reflect the position, size, and intensity of the light spot, so as to facilitate the analysis of the parameters of the light spot at different focusing distances.

[0122] Compared with conventional near-infrared detectors, the detection target surface of the detection module 120 provided in the present application has a larger adjustment space. It only needs to cut or select near-infrared response elements 1201, diffuse films 1202 and visible light imaging elements 1203 of different sizes according to actual needs, and the cost remains basically unchanged. However, the cost of conventional near-infrared detectors will increase 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 conventional near-infrared detectors.

[0123] Furthermore, the diffuse film 1202 may be attached to a side of the near-infrared response element 1202 away from the spectroscopic module 110. The thickness K of the diffuse film 1202 may 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 conditional formula, it is possible to avoid problems such as too low intensity of the light spot after the visible light passes through the diffuse film 1202 or unsatisfactory diffuse reflection effect of the visible light after passing through the diffuse film 1202.

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

[0125] Fig.10 and Fig.11 Schematic diagrams of structures of optical device assembly and adjustment systems 100 according to other exemplary embodiments of the present application are respectively shown.

[0126] refer to Fig.10 and Fig.11 The number of the spectroscopic modules 110 included in the adjustment system 100 can be multiple, and the multiple spectroscopic modules 110 can be separately arranged on multiple field angle light beams of the optical device 130, and each spectroscopic module 110 can split the corresponding field angle light beam into multiple optical paths.

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

[0128] By setting a spectroscopic module 110 on light rays of different field of view angles of the optical device 130, each spectroscopic module 110 can be used to evenly divide the light rays of the corresponding field of view angles into multiple optical paths, and a detection module 120 is correspondingly set on each optical path to ensure that the adjustment system 100 can simultaneously realize the detection of multiple focusing distances and multiple field of view angles of the optical device 130, and there is no need to repeatedly adjust the multiple focusing distances and multiple field of view angles, thereby improving the adjustment efficiency and adjustment accuracy.

[0129] It should be understood that Fig.10 The adjustment process of the adjustment system 100 for each field of view angle is shown in FIG. Figure 1 The adjustment process of the adjustment system 100 shown is the same. Fig.11 The adjustment process of the adjustment system 100 for each field of view angle is shown in FIG. Figure 2 The adjustment process of the adjustment system 100 shown is the same. When the adjustment ranges under multiple viewing angles are different, it is necessary to comprehensively consider the requirements of the multiple viewing angles, and use the intersection of the adjustment ranges under the multiple viewing angles as the final adjustment range.

[0130] use Figure 1 The adjustment system 100 shown in the figure can realize the adjustment of the transmitting device and the receiving device. First, the transmitting device is moved to a predetermined position and Figure 1 The adjustment system 100 shown in the figure adjusts the infinite distance and the limited distance of the transmitting device; then, the transmitting device is moved out from the predetermined position, and the analog device similar to the transmitting device designed based on the receiving device is moved to the predetermined position, using Figure 1 The adjustment system 100 shown in the figure can adjust the analog device at an infinite distance. Figure 1 The adjustment system 100 shown may also only implement the adjustment of the transmitting device, or only implement the adjustment of the analog device similar to the transmitting device designed based on the receiving device.

[0131] use Figure 2 The adjustment system 100 shown can realize the adjustment of the transmitting device. For example, the transmitting device is moved to a predetermined position and Figure 2 The adjustment system 100 shown is used for infinite distance and finite distance adjustment of the transmitting device.

[0132] use Figure 1 or Figure 2 When the illustrated adjustment system 100 adjusts the transmitting device, the optical device 130 is the transmitting device, and the transmitting device can be the transmitting end of the laser radar system. The optimal posture of the transmitting device can be determined according to the position offset of the light emitted by the transmitting device on the first detection module 121 and the second detection module 122, and the transmitting device can be adjusted to the above optimal posture to achieve high-precision adjustment of the transmitting device.

[0133] use Figure 1 When the adjustment system 100 shown adjusts the receiving device, the optical device 130 is configured as an analog device similar to the transmitting device designed based on the receiving device. After the adjustment of the above analog device is completed, the position of the analog device is recorded, and finally the receiving end detector in the receiving device is adjusted to the position accordingly. The receiving device can be the receiving end of the laser radar system. The receiving device can include a receiving end lens and a receiving end detector.

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

[0135] refer to Fig.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, and 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 a fiber array element.

[0136] Fig.13 , Fig.14 and Fig.15 1 and 13 show the corresponding schematic diagrams of the light source element 132 and the receiving end detector 1301 respectively. Fig.13 As shown, the receiving end detector 1301 is a point-type receiving end detector, which only includes one receiving channel 1302. Accordingly, the light source element 132 includes one sub-light source. Fig.14As shown, the receiving end detector 1301 is a linear receiving end detector, which includes a plurality of linearly arranged receiving channels 1302, and the plurality of light source elements 132 may include a plurality of linearly distributed sub-light sources ( Fig.14 a, b or c). Fig.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 ( Fig.15 a or b). The structure of the light source element 132 can be predetermined according to the type of the receiving end detector 1301 of the receiving device.

[0137] When adjusting the above-mentioned analog device, the best posture of the light source element 132 can be determined according to the light spot position on the detection module 120 (i.e., the second detection module 122), and the best posture of the light source element 132 is the posture of the receiving end detector to be adjusted. Finally, the receiving end detector is adjusted to the best posture of the light source element 132 through multiple axes and replaced, and finally the high-precision adjustment of the receiving device is achieved.

[0138] A specific embodiment of the optical device alignment system 100 applicable to the above-mentioned embodiment is further described below.

[0139] Example 1

[0140] Figure 1 A schematic structural diagram of an optical device assembly and adjustment system 100 according to Embodiment 1 is shown. Figure 3 FIG. 1 is a schematic diagram of an optical path for limited long-distance detection of the optical device 130 according to Embodiment 1. FIG. Figure 4 A schematic diagram of the optical path for infinite distance detection of the optical device 130 according to Embodiment 1 is shown.

[0141] refer to Figure 1 The adjustment system 100 may include a spectroscopic module 110, three detection modules 120 and a focusing lens 140, wherein the spectroscopic module 110 includes a first spectroscopic element 111 and a second spectroscopic element 112. The light emitted by the optical device 130 forms three optical paths after passing through the spectroscopic module 110, specifically including a first optical path A, a first optical path B and a second optical path. The optical paths of the three optical paths are different. For example, the optical path of the first optical path A is l 1A , the optical path of the first optical path B is l 1B, the optical path of the second optical path is l2. Accordingly, 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 adjustment system 100 can be applied to the transmitting end or the receiving end of the laser radar system that has a position requirement at a close distance and a long distance measurement requirement (for example, greater than or equal to 200m).

[0142] The light emitted from the optical device 130 is divided into two parts after passing through the first beam splitter 111. One part of the light is reflected by the first beam splitter 111 and then transmitted to a first detection module 121. This part of the light forms a first optical path A, and the optical path of the first optical path A is l 1A Another part of the light passes through the first beam splitter element 111 and reaches the second beam splitter element 112. The second beam splitter element 112 reflects and transmits a part of the received light to another first detection module 121. This part of the light forms a first optical path B, and the optical path of the first optical path B is l 1B Another part of the light received by the second beam splitter element 112 passes through the second beam splitter element 112 and is transmitted to the second detection module 122 after passing through the focusing lens 140. This part of the light forms a second optical path, and the optical path of the second optical path is l2.

[0143] It should be understood that the number of spectroscopic elements, optical paths, and detection modules 120 is only exemplary and can be increased or decreased according to actual needs, and the present application does not impose any specific restrictions on this.

[0144] The basic parameters of the adjustment system 100 of this embodiment are as follows:

[0145] The distance L between the first beam splitter 111 and the optical device 130 in the direction parallel to the optical axis is 11 =100mm;

[0146] The distance L between the second beam splitter 112 and the optical device 130 in the direction parallel to the optical axis is 12 =200mm;

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

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

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

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

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

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

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

[0154] Accordingly, the effective aperture of the first light splitting element 111 is 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 optical path A 1A Can meet: 14mm<Φ 1A <70mm, preferably, 16.8mm<Φ 1A <28mm.

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

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

[0160] The distance L between the first beam splitter 111 and the optical device 130 in the direction parallel to the optical axis is 11 The optical path l of the first optical path A 1A Satisfaction: L 11 / l 1A =0.67.

[0161] The distance L between the second beam splitter 112 and the optical device 130 in the direction parallel to the optical axis is 12 The optical path l of the first optical path B 1B Satisfaction: L 12 / l 1B =0.8.

[0162] Example 2

[0163] Figure 2 A schematic structural diagram of an optical device assembly and adjustment system 100 according to Embodiment 2 is shown. Figure 3 FIG. 1 is a schematic diagram of an optical path for limited long-distance detection of the optical device 130 according to Embodiment 2. FIG.

[0164] refer to Figure 2 The adjustment system 100 may include a spectroscopic module 110 and three detection modules 120, wherein the spectroscopic module 110 includes a first spectroscopic element 111 and a second spectroscopic element 112. The light emitted by the optical device 130 forms three optical paths after passing through the spectroscopic module 110, specifically including a first optical path A, a first optical path B and a second optical path. The optical paths of the three optical paths are different. For example, the optical path of the first optical path A is l 1A , the optical path of the first optical path B is l 1B , the optical path of the second optical path is l2. Accordingly, the three detection modules 120 include two first detection modules 121 and one second detection module 122. The adjustment system 100 can be applied to the transmitting end or receiving end of the laser radar system that has position accuracy requirements at close distances and has a relatively short distance measurement requirement (for example, greater than or equal to 30m).

[0165] The light emitted from the optical device 130 is divided into two parts after passing through the first beam splitter 111. One part of the light is reflected by the first beam splitter 111 and then transmitted to a first detection module 121. This part of the light forms a first optical path A, and the optical path of the first optical path A is l 1A Another part of the light passes through the first beam splitter element 111 and reaches the second beam splitter element 112. The second beam splitter element 112 reflects and transmits a part of the received light to another first detection module 121. This part of the light forms a first optical path B, and the optical path of the first optical path B is l 1B Another part of the light received by the second beam splitter element 112 passes through the second beam splitter element 112 and is transmitted to the second detection module 122. This part of the light forms a second optical path, and the optical path of the second optical path is l2.

[0166] It should be understood that the number of spectroscopic elements, optical paths, and detection modules 120 is only exemplary, and they may be increased or decreased according to the number of focusing distances, and the present application does not impose any specific limitation on this.

[0167] The basic parameters of the adjustment system 100 of this embodiment are as follows:

[0168] The distance L between the first beam splitter 111 and the optical device 130 in the direction parallel to the optical axis is 11 =100mm;

[0169] The distance L between the second beam splitter 112 and the optical device 130 in the direction parallel to the optical axis is 12 =200mm;

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

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

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

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

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

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

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

[0177] The effective aperture 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 optical path A 1A Can meet: 14mm<Φ 1A <70mm, preferably, 16.8mm<Φ 1A <28mm.

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

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

[0181] The distance L between the first beam splitter 111 and the optical device 130 in the direction parallel to the optical axis is 11 The optical path l of the first optical path A 1A Satisfaction: L11 / l 1A =0.67.

[0182] The distance L between the second beam splitter 112 and the optical device 130 in the direction parallel to the optical axis is 12 The optical path l of the first optical path B 1B Satisfaction: L 12 / l 1B =0.8.

[0183] Example 3

[0184] Fig.10 A structural schematic diagram of an optical device adjustment system 100 of Example 3 is shown. The difference between Example 3 and Example 1 is that there are multiple spectrometer modules 110, and the multiple spectrometer modules 110 are arranged on multiple field of view angle light beams, and each spectrometer module 110 divides the corresponding field of view angle light beams into multiple optical paths. The adjustment process and basic parameters of each field of view angle in Example 3 are the same as those in Example 1, and the present application will not repeat them one by one. When there are differences in the adjustment ranges under multiple field of view angles, it is necessary to comprehensively consider the requirements of multiple field of view angles, and take the intersection of the adjustment ranges under multiple field of view angles as the final adjustment range. It should be noted that Fig.10 The number of the light splitting elements included in each light splitting module 110 shown as one is only exemplary. The number of the light splitting elements included in each light splitting module 110 may also be two or more, and the present application does not impose any specific limitation on this.

[0185] Example 4

[0186] Fig.11 A structural schematic diagram of an optical device adjustment system 100 of Example 4 is shown. The difference between Example 4 and Example 2 is that there are multiple spectrometer modules 110, and the multiple spectrometer modules 110 are arranged on multiple field of view angle light beams, and each spectrometer module 110 divides the corresponding field of view angle light beams into multiple optical paths. The adjustment process and basic parameters of each field of view angle in Example 4 are the same as those in Example 2, and the present application will not repeat them one by one. When there are differences in the adjustment ranges under multiple field of view angles, it is necessary to comprehensively consider the requirements of multiple field of view angles, and take the intersection of the adjustment ranges under multiple field of view angles as the final adjustment range. It should be noted that Fig.11 The number of the light splitting elements included in each light splitting module 110 shown as one is only exemplary. The number of the light splitting elements included in each light splitting module 110 may also be two or more, and the present application does not impose any specific limitation on this.

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

[0188] Fig.16 A schematic flow chart of an optical device assembly method 1000 according to an exemplary embodiment of the present application is shown. The assembly method 1000 may include the following steps:

[0189] S10, setting 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.

[0190] S20, setting a detection module on each optical path, the detection module detecting 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.

[0191] The light emitted by the optical device can be divided into multiple optical paths through the light splitting module, and a detection module is correspondingly arranged on each optical path. The optical path of each optical path is different, so as to realize the detection of multiple focusing distances of the optical device at the same time, and there is no need to repeatedly adjust the multiple focusing distances, thereby improving the adjustment efficiency and adjustment accuracy. The focusing distance mentioned in this article is actually the optical path of the corresponding optical path. The optical path of each optical path refers to the product of the distance that the light of each optical path propagates from the optical device to the corresponding detection module and the refractive index of the medium through which the light passes.

[0192] The following is an exemplary description of steps S10 to S20 of an exemplary embodiment of the present application.

[0193] In step S10, a spectroscopic module is arranged on the light emitting path of the optical device, and the spectroscopic module divides the light emitted by the optical device into multiple light paths. For example, n spectroscopic elements are arranged 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 spectroscopic module, where n≥1. The spectroscopic module may include a first spectroscopic element and a second spectroscopic element. The spectroscopic element may be a cubic spectroscope, a flat spectroscope or other forms of spectroscopic elements.

[0194] The multiple optical paths may include a first optical path and a second optical path. For the light in the first optical path, the propagation path of the light will be changed after the light passes through the corresponding beam splitter element. For example, the propagation path of the light after passing through the corresponding beam splitter element may be perpendicular to the optical axis of the optical device. For the light in the second optical path, the propagation path of the light will not be changed after the light passes through the corresponding beam splitter element. In other words, the light in the second optical path always propagates in a direction parallel to the optical axis, that is, the second optical path is parallel to the optical axis.

[0195] As an example, at least one spectroscopic module is arranged on the light emitting path of the optical device. When there are multiple spectroscopic modules, the multiple spectroscopic modules are arranged on multiple field angle light beams of the optical device, and each spectroscopic module divides the corresponding field angle light beams into multiple light paths. By arranging the spectroscopic modules on the light beams of different field angles of the optical device, each spectroscopic module can be used to divide the corresponding field angle light beams into multiple light paths, and a detection module is correspondingly arranged on each light path to ensure that multiple focus distances and multiple field angles of the optical device can be detected at the same time, and there is no need to repeatedly adjust the multiple focus distances and multiple field angles, thereby improving the adjustment efficiency and adjustment accuracy.

[0196] As an example, adjust the position of the spectrometer element and make the spectrometer element satisfy: 0.2≤L1 / l1≤0.8, where 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. In one example, 0.33≤L1 / l1≤0.67. The effective aperture required by the spectrometer element is linearly positively correlated with the distance between the spectrometer element and the optical device in a direction parallel to the optical axis, that is, the farther the spectrometer element is from the optical device in a direction parallel to the optical axis, the larger the effective aperture required by the spectrometer element. By controlling the above conditional formula, the spectrometer element can be placed in a suitable position, which is conducive to selecting a spectrometer element with a suitable effective aperture to ensure that the spectrometer element fully receives the light emitted by the optical device while reducing costs.

[0197] After forming a plurality of optical paths, a detection module is provided on each optical path in step S20, and the detection module detects light of the corresponding optical path, wherein the optical path of light of each optical path from the optical device to the corresponding detection module is different. For example, the plurality of detection modules may include a first detection module and a second detection module. The first detection module corresponds to the first optical path. The second detection module corresponds to the second optical path.

[0198] As an example, the light is near-infrared light, and the detection module is arranged on each light path, including: a near-infrared response element, a diffuse film and a visible light camera element are arranged in sequence on each light path, wherein the near-infrared response 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 response element away from the spectroscopic module, and diffusely reflects the visible light; the visible light camera element is arranged on the side of the diffuse film away from the near-infrared response element, and detects the visible light after diffuse reflection. 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 response element away from the spectroscopic module. The thickness K of the diffuse film can satisfy: 10≤K / λ≤500, where 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 conditional formula, it is possible to avoid problems such as too low spot intensity of visible light after passing through the diffuse film or unsatisfactory diffuse reflection effect of visible light after passing through the diffuse film.

[0200] After the detection module is set, the adjustment method 1000 may further include: setting a focusing lens on the second optical path, wherein the focusing lens is located between the light splitting element corresponding to the second optical path and the second detection module. By setting the focusing lens on the second optical path, infinite distance detection of the optical device can be achieved.

[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, where 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 beam splitter element corresponding to the second optical 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. The effective aperture required by the focusing lens is linearly positively correlated with the distance of the focusing lens from the optical device in the direction parallel to the optical axis, that is, the farther the focusing lens is 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 conditional formula, the focusing lens can be placed in a suitable position, which is conducive to selecting a focusing lens with a suitable effective aperture, so as to ensure that the focusing lens fully receives the light emitted by the optical device while reducing the cost.

[0202] After setting the first detection module, the second detection module and / or the focusing lens, the adjustment method 1000 may further include: adjusting the optical device according to the position offset of the light of the second optical path in the second detection module and the position offset of the light of the first optical path in the first detection module.

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

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

[0205] In addition, when adjusting the optical device based on the inclination angle and the first eccentricity value of the optical device, a method can be adopted in which the infinite distance of the optical device is first adjusted according to the inclination angle of the optical device and then the finite distance of the optical device is adjusted according to the first eccentricity value of the optical device. A method can also be adopted in which the infinite distance and the finite distance of the optical device are synchronously adjusted according to the inclination angle and the first eccentricity value of the optical device.

[0206] When the method of first adjusting the infinite distance of the optical device according to the inclination angle of the optical device and then adjusting the finite distance of the optical device according to the first eccentricity value of the optical device is adopted, first, the optical device is adjusted based on the inclination angle of the optical device; then, the optical device is adjusted based on the first eccentricity value of the optical device; finally, the second eccentricity value of the optical device after the secondary adjustment is obtained, and it is determined whether the second eccentricity value of the optical device after the secondary adjustment is within the preset range. The second eccentricity value of the optical device after the secondary adjustment is d2'=L2×tanθ', where 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 of 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 the direction parallel to the optical axis. When the second eccentricity value of the optical device after the secondary adjustment meets the requirements, that is, the second eccentricity value of the optical device after the secondary adjustment is 0mm~1mm, it means that the adjustment of the optical device is successful.

[0207] Since the aberration of the focusing lens will have a certain influence on the imaging position of the light in the second detection module, when the infinite distance adjustment of the optical device is performed, it is necessary to consider not only the influence of the tilt angle of the optical device, but also the influence of the aberration of the focusing lens. It should be understood that the optical device can be at least one of a transmitting device and an analog device designed based on a receiving device and similar to the transmitting device.

[0208] The step of infinitely long-distance adjustment of the optical device according to the inclination angle of the optical device may include: dividing the detection target surface of the second detection module into multiple areas according to the aberration of the focusing lens, and different areas have different angle compensation amounts; determining the angle compensation amount of the optical device according to the coordinates of the imaging point of the light of the second optical path in the second detection module; and adjusting the optical device based on the angle compensation amount and the inclination angle of the optical device to achieve infinite long-distance adjustment of the optical device.

[0209] As an example, the eccentricity and tilt angle of the optical device are determined 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; the optical device is adjusted based on the tilt angle and eccentricity of the optical device.

[0210] Specifically, when the first optical path and the second optical path are both used for finite distance detection, the eccentricity values ​​of the optical devices corresponding to the first optical path and the second optical path satisfy formula (1), and the position offset △h1 of the light of the first optical path in the first detection module and the optical path l of the first optical path are 1 Substituting into formula (1) we can get equation 1: d = △h1-l 1× tanθ, the position offset of the light of the second optical path in the second detection module △h2, the optical path l2 of the second optical path can be obtained by equation 2: d = △h2-l 2 ×tanθ. By combining equation 1 and equation 2, the eccentricity and tilt angle of the optical device can be calculated. Finally, the optical device can be adjusted based on the tilt angle and eccentricity of the optical device, thereby realizing limited long-distance adjustment of the optical device.

[0211] The following is a detailed introduction to the parameter settings of the spectrometer element, detection module and focusing lens.

[0212] As an example, the effective aperture of each beam splitter element is Can satisfy: Where, L1 is the distance between each 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. In one example, The spectroscopic elements may include but are not limited to the first spectroscopic element and the second spectroscopic element. By making the effective aperture of each spectroscopic element satisfy the above conditional formula, it can be ensured that each spectroscopic element can fully receive the light emitted by the optical device, avoiding the spectroscopic element receiving incomplete information or receiving no information, facilitating the subsequent judgment of the adjustment direction, and avoiding traversing various directions until the light spot is within the detection range of the detection module during the subsequent adjustment, thereby improving the adjustment efficiency and reducing the risk of interference.

[0213] As an example, the effective aperture Φ1 of each first detection module may 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, d max is the maximum eccentricity of the optical device, and D is the spot size of the optical device. In one example, 1.2≤Φ1 / (l1×tanθ max +d max +D)≤2. By making the effective aperture of each first detection module satisfy the above conditional formula, it can be ensured that each first detection module can fully receive the light corresponding to the first optical path, avoiding the first detection module from receiving incomplete information or receiving no information, facilitating the determination of the adjustment direction, and avoiding traversing various directions until the light spot is within the detection range of the first detection module during adjustment, thereby improving the adjustment efficiency and reducing the risk of interference.

[0214] As an example, the effective aperture Φ2 of the second detection module may satisfy: 1≤Φ2 / (l2×tanθmax +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. In one example, 1.2≤Φ2 / (l2×tanθ max +d max +D)≤2. By making the effective aperture of the second detection module satisfy the above conditional formula, it can be ensured that the second detection module can fully receive the light corresponding to the second optical path, avoiding the second detection module from receiving incomplete information or receiving no information, facilitating the determination of the adjustment direction, and avoiding traversing various directions until the light 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 may satisfy: 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. In one example, 1.2≤Φ2 / (F×tanθ max )≤2. By making the effective aperture of the second detection module satisfy the above conditional formula, it can be ensured that the second detection module can fully receive the light corresponding to the second optical path, so as to avoid the second detection module receiving incomplete information or receiving no information, which is convenient for judging the adjustment direction, and can also avoid traversing various directions until the light 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 Can meet: 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. In one example, By making the effective aperture of the focusing lens satisfy the above-mentioned conditional formula, it can be ensured that the focusing lens can fully receive the light emitted by the optical device, avoiding the focusing lens receiving incomplete information or receiving no information, facilitating the subsequent judgment of the adjustment direction, and also avoiding traversing various directions until the light 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 may include a transmitting device. The focal length F of the focusing lens may satisfy: F×tanθ Tx / A≥2, where θTx is the preset adjustment accuracy of the transmitting device, and A is the preset resolution of the second detection module. In one example, 5≤F×tanθ Tx / A≤10. The focusing lens can be used to convert the preset adjustment accuracy of the transmitting device into displacement, and realize the amplification processing of the accuracy requirement, which is conducive to realizing the rapid adjustment of the transmitting device and improving the adjustment efficiency of the transmitting device.

[0218] As an example, the optical device may include an analog device, which is configured as a device designed based on the receiving device and similar to the transmitting device. The focal length F of the focusing lens may satisfy: ((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. In one example, 5≤((F / f)×F×tanθ Rx ) / A≤10. The analog device and the focusing lens are combined to form a new optical system, which can convert the preset adjustment accuracy of the receiving device into displacement and realize the amplification processing of the accuracy requirement. The amplification ratio can be, for example, F / f, which is conducive to realizing the rapid adjustment of the receiving device and improving the adjustment efficiency of the receiving device.

[0219] As an example, the optical device may include a transmitting device and an analog device, wherein the analog device is configured as a device designed based on the receiving device and similar to the transmitting device. The focal length F of the focusing lens may satisfy: 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. In one example, 5≤F×tanθ Tx / A≤10,5≤((F / f)×F×tanθ Rx ) / A≤10. When the transmitting device and the receiving device are assembled and adjusted at the same time, the assembly and adjustment efficiency and the assembly and adjustment accuracy of the transmitting device and the receiving device can be improved by controlling the above conditional expression.

[0220] The above is only an exemplary embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection 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 disposed on the plurality of optical paths and detect the light on the corresponding optical paths, wherein the light on each optical path has a different optical path from the optical device to the corresponding detection module.

2. The adjustment system according to claim 1, characterized in that: The light splitting module includes n light splitting elements arranged along the optical axis and forms n+1 light paths, where n≥1.

3. The adjustment system according to claim 2, characterized in that: The multiple optical paths include a first optical path and a second optical path parallel to the optical axis, 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.

4. The adjustment system according to claim 3, characterized in that: Also includes: A focusing lens is located on the second optical path and is arranged between the beam splitting element corresponding to the second optical path and the second detection module.

5. The adjustment system according to claim 3 or 4, characterized in that: The eccentricity value d1 of the optical device satisfies: d1 = △h1-l1×tanθ, Wherein, θ is the tilt angle of the optical device, Δh1 is the position offset of the light of the first optical path in the first detection module, and l1 is the optical path of the first optical path.

6. The adjustment system according to claim 3, characterized in that: The eccentricity value d2 of the optical device satisfies: d2 = △h2-l2×tanθ, Wherein, θ is the tilt angle of the optical device, Δh2 is the position offset of the light of the second optical path in the second detection module, and l2 is the optical path of the second optical path.

7. The adjustment system according to claim 4, characterized in that: The eccentricity value d2 of the optical device satisfies: d2=L2×tanθ, where θ=arctan(△h2 / F), Wherein, θ is the tilt angle of the optical device, △h2 is the position offset of the light of the second optical path 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.

8. A method for assembling an optical device, characterized in that: include: A light splitting module is arranged on the light emitting path of the optical device, and the light splitting module splits the light emitted by the optical device into multiple light paths; as well as A detection module is arranged on each of the optical paths, and the detection module detects the light of the corresponding optical path, wherein the light of each optical path has a different optical path from the optical device to the corresponding detection module.

9. The adjustment method according to claim 8, characterized in that: The light splitting module is arranged on the light emitting path of the optical device, comprising: N light splitting elements are arranged 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, where n≥1.

10. The adjustment method according to claim 9, characterized in that: 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, and the adjustment method further includes: A focusing lens is provided on the second optical path, wherein the focusing lens is located between the beam splitting element corresponding to the second optical path and the second detection module.

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