Method for determining minimum area of ​​optical element glue coating area and optical element

Abstract

The present invention relates to the field of optical technology and discloses a method for determining the minimum area of ​​a glue-coated region of an optical element, an optical element, a laser emitting device, a computing device, and a computer-readable storage medium. The method comprises: obtaining an area S1 of a water vapor-permeated region in the glue-coated region of the optical element; determining an acceleration factor AF(T&H); and determining an area S2 of a water vapor-permeated region in the glue-coated region of the optical element under a target working scenario based on the area S1 of the water vapor-permeated region in the glue-coated region of the optical element and the acceleration factor AF(T&H); Based on the fact that the glue bonding force F in the non-water vapor-penetrated area of ​​the optical component glue-coated area satisfies the requirement that the glue layer does not fall off after mechanical impact, determine F ≥ sτ = ma; based on s = S0-S2 and m = S0Dρ, determine (S0-S2)τ = S0Dρa; based on (S0-S2)τ = S0Dρa, determine S0 = (S2τ) / (τ-Dρa) = [S1·AF(T&H)·(T / T0)·τ] / (τ-Dρa); and determine the minimum area S ≥ S0 of the optical component glue-coated area in the target working scenario. Through the above methods, the embodiments of the present application solve the problems of high glue costs and waste of resources.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical technology, and specifically to a method for determining the minimum area of ​​a glue-coated region of an optical element, an optical element, a laser emitting device, a computing device, and a computer-readable storage medium. Background Art

[0002] Gluing can not only be used to assemble multiple optical components, but also to perform matte treatment on optical components. Since optical components are often exposed to high temperature and high humidity during operation, large-scale gluing is usually performed to ensure the stability of the assembly between multiple optical components or the reliability of the gluing on the optical components, which can easily lead to a waste of glue costs. Summary of the Invention

[0003] In view of the above problems, the embodiments of the present application provide a method for determining the minimum area of ​​the glue coating area of ​​an optical element, an optical element, a laser emitting device, a computing device and a computer-readable storage medium, which are used to solve the problems of high glue cost and waste of resources.

[0004] According to one aspect of an embodiment of the present application, a method for determining the minimum area of ​​a glue-coated area of ​​an optical element is provided, the method comprising: obtaining the area S1 of a water vapor-permeated area in the glue-coated area of ​​the optical element after a predetermined time T0 under conditions of a predetermined temperature Tu and a predetermined humidity RHu; determining an acceleration factor AF(T&H) according to a Halberg-Peck model; determining the area S2 of a water vapor-permeated area in the glue-coated area of ​​the optical element under a target working scenario according to the area S1 of the water vapor-permeated area in the glue-coated area of ​​the optical element and the acceleration factor AF(T&H), specifically as follows: S2=S1·AF(T&H)·(T / T0), wherein T is the working time of the optical element under the target working scenario; based on the glue bonding force F of the non-water vapor-permeated area in the glue-coated area of ​​the optical element, the glue layer does not fall off after a mechanical impact. Fall, determine F≥sτ=ma, where s is the area of ​​the optical element glue-coated area not penetrated by water vapor in the target working scenario, τ is the shear strength of the glue layer, m is the mass of the glue layer, and a is the mechanical impact acceleration; based on sτ=ma, according to s=S0-S2, m=S0Dρ, determine (S0-S2)τ=S0Dρa, where S0 is the required area of ​​the optical element glue-coated area in the target working scenario, D is the glue layer thickness of the optical element glue-coated area in the target working scenario, and ρ is the glue layer density of the optical element glue-coated area; based on (S0-S2)τ=S0Dρa, determine S0=(S2τ) / (τ-Dρa)=[S1·AF(T&H)·(T / T0)·τ] / (τ-Dρa); determine the minimum area S≥S0 of the optical element glue-coated area in the target working scenario.

[0005] In an optional manner, the acceleration factor AF(T&H) is determined according to the Halberg-Peck model, including: AF(T&H) = (RHs / RHu) n exp{(Ea / K)[(1 / Tu)-(1 / Ts)]}, where RHs is the ambient humidity of the optical component gluing area under the target working scenario, n is the humidity acceleration constant, Ea is the activation energy, K is the Boltzmann constant, and Ts is the ambient temperature of the optical component gluing area under the target working scenario. The area S2 of the optical component gluing area permeated by water vapor under the target working scenario is determined based on the area S1 of the optical component gluing area permeated by water vapor and the acceleration factor AF(T&H), including: S2=S1·AF(T&H)·(T / T0)=S1·(RHs / RHu) n ·exp{(Ea / K)·[(1 / Tu)-(1 / Ts)]}·(T / T0).

[0006] In an optional manner, obtaining the area S1 of the water vapor penetrated region in the glue-coated area of ​​the optical element after a predetermined time T0 under conditions of a predetermined temperature Tu and a predetermined humidity RHu includes: obtaining an image to be detected, wherein the image to be detected is an image of the glue-coated area of ​​the optical element after a water vapor penetration test and removal of the glue layer under conditions of a predetermined temperature Tu and a predetermined humidity RHu after a predetermined time T0; calculating the ratio of the area of ​​the water vapor penetrated region in the glue-coated area of ​​the optical element in the image to be detected to the area of ​​the glue-coated area of ​​the optical element; calculating the product of the ratio and the actual area of ​​the glue-coated area of ​​the optical element to obtain the area S1 of the water vapor penetrated region in the glue-coated area of ​​the optical element.

[0007] In an optional manner, before calculating the ratio of the area of ​​the water vapor penetrated area in the optical element glue-coated area in the image to be detected to the area of ​​the optical element glue-coated area, the method further includes: fitting the edge of the area not penetrated by water vapor in the optical element glue-coated area in the image to be detected; and determining the area between the fitted edge in the image to be detected and the edge of the optical element glue-coated area as the water vapor penetrated area in the optical element glue-coated area.

[0008] In an optional manner, the glue-coated area of ​​the optical element is used for matting; the method also includes: when the transmittance X% of the glue-coated area of ​​the optical element in the target working scene is required to be a positive value, determining that the glue layer thickness D = exp[(22.24-X) / (4.5)] of the glue-coated area of ​​the optical element in the target working scene; when the transmittance X% of the glue-coated area of ​​the optical element in the target working scene is required to be 0, determining that the glue layer thickness D of the glue-coated area of ​​the optical element in the target working scene is greater than 140 μm.

[0009] According to another aspect of an embodiment of the present application, an optical element is provided, wherein a glue-coated area is provided on the optical element, and the minimum area of ​​the glue-coated area is obtained by any of the above methods for determining the minimum area of ​​the glue-coated area of ​​the optical element.

[0010] In an optional manner, at least a portion of the surface of the optical element is a coating surface, and the glue-coated area is arranged on the coating surface.

[0011] According to another aspect of an embodiment of the present application, a laser emitting device is provided, comprising a light source and an optical element as described in any one of the above items, wherein the optical element is used to process a light beam emitted by the light source.

[0012] According to another aspect of an embodiment of the present application, a computing device is provided, including: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; the memory is used to store executable instructions, and the executable instructions enable the processor to execute the operation of the method for determining the minimum area of ​​the glue-coated area of ​​an optical element as described in any one of the above items.

[0013] According to another aspect of an embodiment of the present application, a computer-readable storage medium is provided, which stores executable instructions. When the executable instructions are executed on a computing device, the computing device executes the operation of the method for determining the minimum area of ​​the optical element coating area as described in any one of the above items.

[0014] In the method for determining the minimum area of ​​the optical element glue coating area provided in the embodiment of the present application, the area S1 of the water vapor permeated area in the optical element glue coating area and the shear strength τ of the glue layer are obtained through experimental detection, and according to the Halberg-Peck model and the glue bonding force F of the water vapor non-permeated area in the optical element glue coating area to meet the requirement that the glue layer does not fall off after mechanical impact, the required area S0 of the optical element glue coating area in the target working scenario is derived, where S0 is the minimum limit value of the glue coating area area on the basis of ensuring that the glue layer in the optical element glue coating area can adapt to the actual working environment and meet various requirements in actual work. Based on this minimum limit value, the minimum area S of the optical element glue coating area in the target working scenario is determined to be greater than or equal to S0, so that the glue layer in the actual glue coating area of ​​the optical element meets its working requirements while achieving precise control of cost.

[0015] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to more clearly understand the technical means of the embodiments of the present application, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the drawings. In the drawings:

[0017] Figure 1 A schematic flow chart of a method for determining the minimum area of ​​a glue-coated region of an optical element provided in an embodiment of the present application;

[0018] Figure 2 This is a flowchart of sub-steps of step 120 and step 130 in the method for determining the minimum area of ​​the adhesive coating region of an optical element provided in an embodiment of the present application;

[0019] Figure 3 This is a schematic flow chart of the sub-steps of step 110 in the method for determining the minimum area of ​​the adhesive coating region of an optical element provided in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of an image to be detected in the method for determining the minimum area of ​​a glue-coated area of ​​an optical element provided in an embodiment of the present application;

[0021] Figure 5 This is a schematic flow chart of the steps before step 113 in the method for determining the minimum area of ​​the adhesive coating region of an optical element provided in an embodiment of the present application;

[0022] Figure 6a A schematic diagram of an original image to be inspected in the method for determining the minimum area of ​​a glue-coated region of an optical element provided in an embodiment of the present application;

[0023] Figure 6b A schematic diagram of an image to be detected after edge fitting in the method for determining the minimum area of ​​a glue-coated area of ​​an optical element provided in an embodiment of the present application;

[0024] Figure 7 A further flowchart of the method for determining the minimum area of ​​the adhesive coating region of an optical element provided in an embodiment of the present application;

[0025] Figure 8 A schematic side view of the adhesive coating area of ​​an optical element provided in an embodiment of the present application;

[0026] Figure 9 A schematic diagram of the three-dimensional structure of an optical element provided in an embodiment of the present application;

[0027] Figure 10 A schematic diagram of the modular structure of a computing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0029] Gluing the surface of optical components can be used for assembly between multiple optical components and for matting optical components. During operation, optical components are often exposed to high temperature and high humidity due to the heat generated by the light beam. This high temperature and high humidity environment can easily cause moisture to penetrate the adhesive layer, reducing the bonding strength, thereby affecting the stability of the assembly between multiple optical components and the reliability of the adhesive layer matting.

[0030] To this end, a large area of ​​glue is usually applied to the surface of the optical component. Although this can ensure reliable bonding, it will result in a waste of glue costs.

[0031] Based on this, the present application proposes a method for determining the minimum area of ​​the glue coating area of ​​an optical element. By determining the minimum area of ​​the glue coating area on the surface of the optical element, the subsequent glue coating can be carried out according to the minimum area, thereby ensuring that the bonding strength of the glue layer meets the performance requirements while reducing the required cost and solving the problem of glue waste.

[0032] According to one aspect of the embodiment of the present application, a method for determining the minimum area of ​​the adhesive coating area of ​​an optical element is provided. The method can be executed by a computing device, which can be, for example, a mobile terminal, a computer, a server, etc. Figure 1 , the figure shows the process of the method, as shown in the figure, the method includes the following steps:

[0033] Step 110: Obtaining the area S1 of the water vapor-permeated region in the glue-coated region of the optical element after a predetermined time period T0 under the conditions of a predetermined temperature Tu and a predetermined humidity RHu.

[0034] In this step, the adhesive-coated optical element can be placed in an environment with a predetermined temperature Tu and a predetermined humidity RHu. After a predetermined time T0, the adhesive layer is removed. The area S1 of the water vapor permeable region can then be obtained through observation and measurement and input into a computing device to obtain the area S1 of the water vapor permeable region of the optical element's adhesive-coated area. Alternatively, S1 can be obtained by photographing an image of the adhesive-coated area, performing semantic analysis on the image, and calculating the area to obtain the area S1 of the water vapor permeable region. The predetermined temperature can be 85°C, the predetermined humidity can be expressed in relative humidity, which can be 85% RH, and the predetermined time can be 1000 hours.

[0035] Step 120: Determine the acceleration factor AF(T&H) according to the Hallberg-Peck Model.

[0036] Step 130: Determine the area S2 of the optical element's glue-coated area that is penetrated by water vapor based on the area S1 of the optical element's glue-coated area and the acceleration factor AF(T&H). The specific calculation method for S2 is as follows:

[0037]

[0038] Wherein, T is the working time of the optical element in the target working scenario.

[0039] Specifically, technicians can determine the maximum duration that the optical element may be in a high temperature and high humidity environment during the actual working process based on the application scenarios, fields, roles played in corresponding products and actual working conditions of the coated optical element, and combine relevant experience, and determine it as the working time T of the optical element in the target working scenario.

[0040] Step 140: Based on the fact that the glue bonding force F of the non-water vapor penetrating area in the glue-coated area of ​​the optical element satisfies the requirement that the glue layer does not fall off after mechanical impact, determine F≥sτ=ma, where s is the area of ​​the non-water vapor penetrating area in the glue-coated area of ​​the optical element under the target working scenario, τ is the shear strength of the glue layer, m is the mass of the glue layer, and a is the mechanical impact acceleration.

[0041] In this step, s is used as an intermediate parameter only to represent the area of ​​the optical element's glue-coated area that is not penetrated by water vapor in the target working scenario, and its specific value does not need to be obtained.

[0042] The adhesive layer shear strength τ can be determined experimentally and input into a computing device to obtain the specific value. Specifically, the optical element can be bonded to the substrate using a predetermined area of ​​glue. Once the bond is secure, a thrust parallel to the plane of the adhesive layer is applied to the optical element. The thrust is gradually increased until relative movement occurs between the optical element and the substrate. The current thrust is then measured and the ratio of this thrust to the predetermined area is calculated to obtain the adhesive layer shear strength τ.

[0043] The mechanical impact acceleration a of the adhesive layer can be determined based on the maximum impact force that the optical element will be subjected to when it is actually working in the assembled product. Specifically, when the maximum impact force that the optical element will be subjected to when it is actually working is F max When the mechanical impact acceleration of the adhesive layer is a=F max / m, where m is the mass of the adhesive layer. The specific value of a determined is input into the calculation device to obtain the mechanical impact acceleration a.

[0044] In order to ensure the reliability of the adhesive layer, it is necessary to ensure that F≥F max , that is, the bonding strength of the adhesive layer needs to be greater than or equal to the impact force it is subjected to. Only under this condition, the components fixed by the adhesive layer will not separate from each other when subjected to the impact force F, ensuring the stability and reliability of the product.

[0045] Step 150: Based on sτ=ma, according to s=S0-S2, m=S0Dρ, determine (S0-S2)τ=S0Dρa, where S0 is the required area of ​​the optical element glue coating area under the target working scenario, D is the glue layer thickness of the optical element glue coating area under the target working scenario, and ρ is the glue layer density of the optical element glue coating area.

[0046] The area S0 of the optical component's glue-coated area in the target operating scenario is a parameter that will be calculated and determined later, so its specific value does not need to be determined in this step. The glue layer thickness D of the optical component's glue-coated area in the target operating scenario can be determined based on the actual glue coating equipment or process, and the specific glue thickness value corresponding to the glue coating equipment or process can be input into the calculation device. The specific value of the glue layer density ρ of the optical component's glue-coated area can be determined based on the glue material and then input into the calculation device.

[0047] Step 160: Determine S0 based on (S0-S2)τ=S0Dρa. The specific calculation method of S0 is as follows:

[0048]

[0049] In this step, the specific value of the required area S0 of the glue-coated region of the optical element in the target working scenario can be obtained through the parameters obtained above and their specific values.

[0050] Step 170: Determine the minimum area S≥S0 of the glue-coated region of the optical element in the target working scenario.

[0051] In this step, S can be set to a value slightly larger than S0, such as S=1.1S0 or S=1.2S0, etc., so as to ensure that the glue layer meets the working requirements while achieving precise control of the glue cost.

[0052] In the method for determining the minimum area of ​​the optical element glue coating area provided in the embodiment of the present application, the area S1 of the water vapor permeated area in the optical element glue coating area and the shear strength τ of the glue layer are obtained through experimental detection, and according to the Halberg-Peck model and the glue bonding force F of the water vapor non-permeated area in the optical element glue coating area to meet the requirement that the glue layer does not fall off after mechanical impact, the required area S0 of the optical element glue coating area in the target working scenario is derived, where S0 is the minimum limit value of the glue coating area area on the basis of ensuring that the glue layer in the optical element glue coating area can adapt to the actual working environment and meet various requirements in actual work. Based on this minimum limit value, the minimum area S of the optical element glue coating area in the target working scenario is determined to be greater than or equal to S0, so that the glue layer in the actual glue coating area of ​​the optical element meets its working requirements while achieving precise control of cost.

[0053] Regarding the steps for determining the acceleration factor AF(T&H) and the area S2 of the water vapor permeated region in the adhesive coating region of the optical element under the target working scenario, this application proposes an implementation method, which can be found in detail in Figure 2 , the figure shows the sub-step process of step 120 and step 130. As shown in the figure, step 120 includes step 121:

[0054]

[0055] Wherein, RHs is the ambient humidity of the adhesive coating area of ​​the optical element in the target working scenario; n is the humidity acceleration constant, which is between 2 and 3, and 3 can be generally used; Ea is the activation energy, which is generally 0.45 eV; K is the Boltzmann constant, K = 8.6 × 10 -5 eV / K; Ts is the ambient temperature of the glue-coated area of ​​the optical element in the target working scenario, in °C.

[0056] Step 130 includes step 131:

[0057]

[0058] In this solution, the specific value of the acceleration factor is first calculated, and then substituted into the calculation step of the area S2 of the water vapor penetration area in the glue-coated area of ​​the optical element under the target working scenario to realize the calculation of S2.

[0059] For obtaining the area S1 of the water vapor permeated area in the glue-coated area of ​​the optical element, this application proposes an implementation method. Figure 3 , the figure shows the sub-step process of step 110. As shown in the figure, step 110 includes the following steps:

[0060] Step 111: Acquire an image to be tested, wherein the image to be tested is an image of the glue-coated area of ​​the optical element at a predetermined temperature Tu and a predetermined humidity RHu, after a predetermined time T0, a water vapor permeation test, and after the glue layer is removed.

[0061] See also Figure 4 The figure schematically shows an image to be detected. As shown in the figure, the image to be detected 200 includes a complete glue-coated area 210, and the glue-coated area 210 includes a water vapor-penetrated area 211 (the area shown by the hatched line in the figure) and an area 212 not penetrated by water vapor.

[0062] Step 113: Calculate the ratio of the area of ​​the water vapor-permeated region in the glue-coated region of the optical element in the image to be detected to the area of ​​the glue-coated region of the optical element.

[0063] by Figure 4 For example, semantic analysis may be performed on the image to be inspected 200 to determine the water vapor permeated region 211 , and then the ratio between the area of ​​the water vapor permeated region 211 and the area of ​​the glue-coated region 210 may be calculated.

[0064] Step 115: Calculate the product of the ratio and the actual area of ​​the optical element glue-coated region to obtain the area S1 of the water vapor-permeated region in the optical element glue-coated region.

[0065] Specifically, the actual area of ​​the glue-coated area of ​​the optical element can be precisely controlled during glue coating, or can be obtained by measurement after glue coating. After the value of the actual area of ​​the glue-coated area of ​​the optical element is input into the computing device, the size of the area S1 of the water vapor-permeable area in the glue-coated area of ​​the optical element can be determined by multiplying the value of the actual area by the ratio obtained in step 113.

[0066] In this scheme, a water vapor permeation experiment is first conducted after the optical element is coated with glue. Then, an image recognition algorithm is used to determine and calculate the size of the area S1 of the water vapor permeated area in the glue-coated area of ​​the optical element. Compared with manual measurement, the value of S1 can be obtained more quickly and accurately.

[0067] Furthermore, considering that the edges of the optical element's glue-coated area that is not penetrated by water vapor may be blurred in the image to be tested after the water vapor penetration test, this application also proposes an implementation method. For details, please refer to Figure 5 , the figure shows the process of the steps before step 113. As shown in the figure, the following steps are also included before step 113:

[0068] Step 1121: Fit the edge of the area not penetrated by water vapor in the glue-coated area of ​​the optical element in the image to be inspected.

[0069] Specifically, water vapor permeation can be measured using a red ink test. This involves applying a layer of adhesive to an optical element. The optical element is then placed under a predetermined temperature Tu (e.g., 85°C) and humidity RHu (e.g., 85% RH) for a predetermined time T0 (e.g., 1000 hours). Red ink is then dripped onto the adhesive layer. After the red ink dries, the adhesive layer is removed from the optical element. The adhesive layer after removal is then photographed to determine the area within the adhesive layer that has been penetrated by the red ink.

[0070] like Figure 6a As shown in FIG, in the obtained image to be detected 200, the edge of the area 212 of the optical element glue-coated area that is not penetrated by water vapor may be blurred. To this end, the blurred edge can be fitted by using an analytical expression to approximate discrete data or a least square method to form a Figure 6b The image shown, where the dotted lines represent the edges formed during the fitting process.

[0071] Step 1122: Determine the area between the fitted edge in the image to be detected and the edge of the optical element glue-coated area as the water vapor-permeated area in the optical element glue-coated area.

[0072] Specifically, if Figure 6b As shown in FIG, the determined water vapor permeated area 211 is the area between the fitted edge 221 and the edge 222 of the optical element glue coating area, that is, the area shown by the hatched line in the figure.

[0073] In this solution, by fitting the edges of the area not penetrated by water vapor in the image to be detected, it is ensured that the periphery of the area not penetrated by water vapor can form a closed area, thereby avoiding affecting the determination of the area of ​​the area penetrated by water vapor when part of the edges of the area not penetrated by water vapor in the image to be detected are blurred, and ensuring that the calculation result of the area S1 of the area penetrated by water vapor in the glue-coated area of ​​the optical element is accurate and reliable.

[0074] For the application scenario where the glue-coated area of ​​the optical element is used for matting, considering the different requirements for the matting rate, this application also proposes an implementation method. Figure 7 The figure shows a further step flow of the method for determining the minimum area of ​​the adhesive coating area of ​​an optical element provided by an embodiment of the present application. As shown in the figure, the method further includes the following steps:

[0075] Step 180: Determine whether the transmittance X% of the glue-coated area of ​​the optical element is greater than 0 in the target working scenario.

[0076] If the answer in step 180 is yes, then step 191 is executed: determining the adhesive layer thickness D of the adhesive coating area of ​​the optical element in the target working scene as follows:

[0077]

[0078] If the judgment in step 180 is no, then step 192: determine that the adhesive layer thickness D of the adhesive coating area of ​​the optical element in the target working scene is greater than 140 μm.

[0079] Specifically, when applying glue to matte an optical element, there is a relationship between the thickness of the glue layer and the transmittance. To determine the functional relationship between the thickness of the glue layer and the transmittance, the inventors of this application conducted experimental research using UV thermosetting glue and found that the thickness of the glue layer and the transmittance have the following relationship:

[0080] X=-4.5ln(D)+22.24

[0081] Based on this formula, we can get:

[0082]

[0083] Based on this functional relationship, when X=0 is substituted, D≈140.05μm can be obtained. After rounding, when the transmittance requirement is greater than 0, D=exp[(22.24-X) / (4.5)], and D≤140μm. When the transmittance requirement is 0, D>140μm, where D generally does not exceed 400μm.

[0084] Therefore, in this solution, when the transmittance requirement X% is positive, substituting the specific value of X into the formula D = exp[(22.24 - X) / (4.5)] accurately determines the adhesive layer thickness. Applying adhesive to the optical element based on this determined thickness will ensure that the required transmittance is met. When the transmittance requirement X% is zero, the adhesive layer thickness is determined to be greater than 140 μm to meet the requirement of being opaque.

[0085] In addition, when applying glue on optical elements, it is generally applied in one direction, so the glue layer at the end of the glue application direction will form a slope structure, as shown in the following example. Figure 8 As shown in the figure, the side view structure of the adhesive coating area 310 on the surface of the optical element 300 is shown. In order to prevent light leakage at the slope, the transmittance of the edge of the adhesive layer in the adhesive coating area 310 can be controlled by controlling the thickness of the adhesive layer in the adhesive coating area 310. Specifically, the following steps are included:

[0086] When the transmittance requirement at a position with a distance d (in μm) from the extinction edge in the target working scene is A%, according to A=-4.5ln(D a ) + 22.24, determine the thickness D at a distance d from the extinction edge a =exp[(22.24-A) / 4.5].

[0087] According to the relationship of trigonometric functions, the angle θ between the slope and the coating surface is determined as arctan(D a / d).

[0088] When the transmittance at a distance d from the extinction edge is required to be 0% in the target working scenario, the thickness D at a distance d from the extinction edge is determined. a >140μm.

[0089] According to the trigonometric function relationship, the angle between the slope and the coating surface is determined to be θ> arctan (140 / d)

[0090] In this solution, after determining the angle of the slope based on the transmittance at the corresponding position of the slope, it is possible to determine whether the transmittance meets the requirements of the target working scenario by detecting whether the actual angle of the slope meets the corresponding angle requirements.

[0091] In the field of laser emitting devices, optical elements are needed to shape the light beam. Taking semiconductor lasers as an example, they have the advantages of small size, light weight, high reliability and low cost, and have been widely used in laser pumping, medical beauty, automotive radar and other fields. For automotive radar, it generally includes a semiconductor laser, a circuit board and a beam shaping element. The semiconductor laser is packaged on a circuit board, and the circuit board provides current and drive for the semiconductor laser. The beam shaping element is an optical element, which is used to shape the light beam emitted by the semiconductor. The surface of the beam shaping element needs to be extinct to ensure that its aperture meets the size requirements, and the accuracy requirement of the aperture needs to reach 10μm or above to ensure that the shaped beam meets the requirements of residual light and stray light, and thus meet the accuracy requirements of laser ranging.

[0092] Currently, there are two methods for extinction of optical components: aperture extinction and surface ink coating extinction. Aperture extinction refers to achieving extinction by setting a physical structure in the optical path to block light, and surface ink coating refers to extinction by coating an ink layer on the surface of the optical component. Among them, for the aperture extinction method, since the optical component needs to monitor the light beam of the laser emitter during the assembly process and use a precision motion system to accurately adjust the position of the optical component, and during this process, the position of the aperture is fixed, which will cause the relative position between the optical component and the aperture to change, resulting in a deviation between the actual position of the aperture and the theoretically required light-blocking position, causing the aperture to be unable to reliably eliminate residual light and stray light. For the surface ink coating extinction method, since the bonding force between the ink layer and the surface of the optical component is weak, the surface of the optical component needs to be roughened before ink coating, which is a complex process and inefficient.

[0093] According to another aspect of the embodiment of the present application, an optical element is also provided. Figure 9 As shown in the figure, the optical element 300 is provided with a glue-coated area 310, and the minimum area of ​​the glue-coated area 310 is obtained by the method for determining the minimum area of ​​the glue-coated area of ​​the optical element in any of the above embodiments.

[0094] After determining the minimum area of ​​the glue coating area 310 using the above-mentioned method for determining the minimum area of ​​the glue coating area of ​​the optical element, glue is coated on the optical element 300 based on the minimum area. This can ensure that the glue layer in the glue coating area 310 meets its working requirements while achieving precise control of costs. In addition, the method of matting the optical element by gluing is simple, easy to operate, and highly efficient.

[0095] Furthermore, some optical components are coated with coatings, such as projection coatings or reflective coatings. For coated optical components, ink cannot be applied directly to the coated surface. The coating must be removed and roughened before the inked area can be applied, making the entire process more complex. Furthermore, because ink application to optical components is prone to splattering, the inking matte method also requires cleaning and protecting the light-transmitting areas of the optical component, which is costly.

[0096] Based on this, the present application further proposes an implementation method. Specifically, at least a portion of the surface of the optical element 300 is a coating surface, and the glue-coated area 310 is provided on the coating surface.

[0097] The coating can be a projection film, a reflective film, etc. Since the glue has strong bonding ability, there is no need to remove the coating and perform roughness treatment when using the glue matting method. The glue can be directly applied on the coated surface of the optical element 300. The steps are simple and it is beneficial to improve the efficiency of gluing the optical element 300.

[0098] According to another aspect of the embodiments of the present application, a laser emitting device is also provided, which includes a light source and the optical element in any of the above embodiments, and the optical element is used to process the light beam emitted by the light source.

[0099] According to another aspect of the embodiment of the present application, a computing device is also provided. Figure 10 , the figure shows a schematic diagram of the structure of the computing device provided in an embodiment of the present application. The specific embodiment of the present application does not limit the specific implementation of the computing device.

[0100] like Figure 10As shown, the computing device may include: a processor 402 , a communications interface 404 , a memory 406 , and a communication bus 408 .

[0101] Processor 402, communication interface 404, and memory 406 communicate with each other via communication bus 408. Communication interface 404 is used to communicate with other devices, such as client devices or other server network elements. Processor 402 is used to execute program 410, which may specifically perform the steps described in the aforementioned embodiment of the method for determining the minimum area of ​​a glue-coated region on an optical component.

[0102] Specifically, the program 410 may include program code including computer-executable instructions.

[0103] Processor 402 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application. The one or more processors included in the computing device may be processors of the same type, such as one or more CPUs, or may be processors of different types, such as one or more CPUs and one or more ASICs.

[0104] The memory 406 is used to store the program 410. The memory 406 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0105] The program 410 may be specifically invoked by the processor 402 to cause the computing device to perform the following operations:

[0106] Obtaining an area S1 of a water vapor-permeated region in the optical element glue coating region after a predetermined time T0 under predetermined temperature Tu and predetermined humidity RHu conditions;

[0107] According to the Hallberg-Peck model, the acceleration factor AF(T&H) is determined;

[0108] Based on the area S1 of the water vapor penetration area in the optical component glue coating area and the acceleration factor AF(T&H), the area S2 of the water vapor penetration area in the optical component glue coating area under the target working scenario is determined as follows:

[0109] S2 = S1 · AF(T&H) · (T / T0), where T is the operating time of the optical element in the target operating scenario;

[0110] Based on the requirement that the adhesive bonding force F of the non-water vapor-penetrated area of ​​the optical component glue coating ensures that the adhesive layer does not fall off after mechanical impact, determine F ≥ sτ = ma, where s is the area of ​​the non-water vapor-penetrated area of ​​the optical component glue coating under the target working scenario, τ is the shear strength of the adhesive layer, m is the mass of the adhesive layer, and a is the mechanical impact acceleration;

[0111] Based on sτ=ma, according to s=S0-S2, m=S0Dρ, determine (S0-S2)τ=S0Dρa, where S0 is the required area of ​​the optical component glue-coated area in the target working scenario, D is the glue layer thickness of the optical component glue-coated area in the target working scenario, and ρ is the glue layer density of the optical component glue-coated area;

[0112] Based on (S0-S2)τ=S0Dρa, determine S0=(S2τ) / (τ-Dρa)=[S1·AF(T&H)·(T / T0)·τ] / (τ-Dρa);

[0113] Determine the minimum area S ≥ S0 of the optical component glue coating area under the target working scenario.

[0114] According to another aspect of the embodiments of the present application, a computer-readable storage medium is further provided, which stores executable instructions. When the executable instructions are executed on a computing device, the computing device executes the method for determining the minimum area of ​​the optical element coating area in any of the above method embodiments.

[0115] The executable instructions may be used to cause the computing device to perform the following operations:

[0116] Obtaining an area S1 of a water vapor-permeated region in the optical element glue coating region after a predetermined time T0 under predetermined temperature Tu and predetermined humidity RHu conditions;

[0117] According to the Hallberg-Peck model, the acceleration factor AF(T&H) is determined;

[0118] Based on the area S1 of the water vapor penetration area in the optical component glue coating area and the acceleration factor AF(T&H), the area S2 of the water vapor penetration area in the optical component glue coating area under the target working scenario is determined as follows:

[0119] S2 = S1 · AF(T&H) · (T / T0), where T is the operating time of the optical element in the target operating scenario;

[0120] Based on the requirement that the adhesive bonding force F of the non-water vapor-penetrated area of ​​the optical component glue coating ensures that the adhesive layer does not fall off after mechanical impact, determine F ≥ sτ = ma, where s is the area of ​​the non-water vapor-penetrated area of ​​the optical component glue coating under the target working scenario, τ is the shear strength of the adhesive layer, m is the mass of the adhesive layer, and a is the mechanical impact acceleration;

[0121] Based on sτ=ma, according to s=S0-S2, m=S0Dρ, determine (S0-S2)τ=S0Dρa, where S0 is the required area of ​​the optical component glue-coated area in the target working scenario, D is the glue layer thickness of the optical component glue-coated area in the target working scenario, and ρ is the glue layer density of the optical component glue-coated area;

[0122] Based on (S0-S2)τ=S0Dρa, determine S0=(S2τ) / (τ-Dρa)=[S1·AF(T&H)·(T / T0)·τ] / (τ-Dρa);

[0123] Determine the minimum area S ≥ S0 of the optical component glue coating area under the target working scenario.

[0124] The algorithm or demonstration provided here are not inherently relevant to any particular computer, virtual system or other equipment. Various general purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious that the structure required for constructing this type of system. In addition, the present application embodiment is not directed to any specific programming language yet. It should be understood that various programming languages ​​can be utilized to realize the content of the present application described here, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the present application.

[0125] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0126] Similarly, it should be understood that in order to streamline the present application and assist in understanding one or more of the various aspects of the invention, in the above description of the exemplary embodiments of the present application, the various features of the embodiments of the present application are sometimes grouped together into a single embodiment, figure, or description thereof.

[0127] Those skilled in the art will appreciate that the modules in the devices in the embodiments can be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and can be divided into multiple submodules or subunits or subassemblies. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying abstract and drawings) and all processes or units of any method or device disclosed in this manner can be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying abstract and drawings) can be replaced by alternative features providing the same, equivalent or similar purpose.

[0128] The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application may be implemented by means of hardware comprising a number of distinct elements and by means of a suitably programmed computer. The use of the words first, second, and third, etc., does not denote any order. These words may be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order in which they are performed.

Claims

1. A method for determining the minimum area of ​​a glue-coated area of ​​an optical element, characterized in that: The method comprises: Obtaining an area S1 of a water vapor-permeated region in the adhesive coating region of the optical element after a predetermined time period T0 under predetermined temperature Tu and predetermined humidity RHu conditions; According to the Hallberg-Peck model, the acceleration factor AF(T&H) is determined; The area S2 of the water vapor permeated area in the optical element glue coating area under the target working scenario is determined based on the area S1 of the water vapor permeated area in the optical element glue coating area and the acceleration factor AF(T&H), as follows: S2=S1·AF(T&H)·(T / T0), where T is the operating time of the optical element in the target operating scenario; Based on the fact that the adhesive bonding force F of the non-water vapor penetrating area of ​​the optical component glue-coated area satisfies the requirement that the adhesive layer does not fall off after mechanical impact, F ≥ sτ = ma, where s is the area of ​​the non-water vapor penetrating area of ​​the optical component glue-coated area under the target working scenario, τ is the shear strength of the adhesive layer, m is the mass of the adhesive layer, and a is the mechanical impact acceleration; Based on sτ=ma, according to s=S0-S2, m=S0Dρ, determine (S0-S2)τ=S0Dρa, where S0 is the required area of ​​the optical component glue-coated area in the target working scenario, D is the glue layer thickness of the optical component glue-coated area in the target working scenario, and ρ is the glue layer density of the optical component glue-coated area; Based on (S0-S2)τ=S0Dρa, determine S0=(S2τ) / (τ-Dρa)=[S1·AF(T&H)·(T / T0)·τ] / (τ-Dρa); Determine the minimum area S≥S0 of the glue-coated region of the optical element in the target working scenario.

2. The method for determining the minimum area of ​​the adhesive coating region of an optical element according to claim 1, wherein: The acceleration factor AF(T&H) is determined according to the Hallberg-Peck model, including: AF(T&H)=(RHs / RHu) n exp{(Ea / K)[(1 / Tu)-(1 / Ts)]}, where RHs is the ambient humidity of the optical component glue-coating area under the target operating scenario, n is the humidity acceleration constant, Ea is the activation energy, K is the Boltzmann constant, and Ts is the ambient temperature of the optical component glue-coating area under the target operating scenario; The determining, based on the area S1 of the water vapor permeated area in the optical element glue-coated area and the acceleration factor AF(T&H), the area S2 of the water vapor permeated area in the optical element glue-coated area under the target working scenario includes: S2=S1·AF(T&H)·(T / T0)=S1·(RHs / RHu) n ·exp{(Ea / K)·[(1 / Tu)-(1 / Ts)]}·(T / T0)。 3. The method for determining the minimum area of ​​the adhesive coating region of an optical element according to claim 1, wherein: The step of obtaining the area S1 of the water vapor-permeated region of the optical element glue-coated region after a predetermined time T0 under the conditions of a predetermined temperature Tu and a predetermined humidity RHu comprises: Acquire an image to be tested, wherein the image to be tested is an image of the glue-coated area of ​​the optical element under the predetermined temperature Tu and the predetermined humidity RHu conditions, after the predetermined time T0, after a water vapor permeation test, and after the glue layer is removed; Calculating the ratio of the area of ​​the water vapor-permeated region in the glue-coated region of the optical element in the image to be detected to the area of ​​the glue-coated region of the optical element; The product of the ratio and the actual area of ​​the optical element glue-coated region is calculated to obtain the area S1 of the water vapor permeated region in the optical element glue-coated region.

4. The method for determining the minimum area of ​​the adhesive coating region of an optical element according to claim 3, wherein: Before calculating the ratio of the area of ​​the water vapor-permeated region in the optical element glue-coated region in the image to be detected to the area of ​​the optical element glue-coated region, the method further includes: Fitting the edge of the area not penetrated by water vapor in the glue-coated area of ​​the optical element in the image to be detected; The area between the fitted edge in the image to be detected and the edge of the optical element glue-coated area is determined as the water vapor-permeated area in the optical element glue-coated area.

5. The method for determining the minimum area of ​​the adhesive coating region of an optical element according to claim 1, wherein: The glue-coated area of ​​the optical element is used for matting; The method further comprises: When the transmittance X% of the glue-coated area of ​​the optical element in the target working scenario is required to be a positive value, determining the glue layer thickness D=exp[(22.24-X) / (4.5)] of the glue-coated area of ​​the optical element in the target working scenario; When the transmittance X% of the glue-coated area of ​​the optical element in the target working scenario is required to be 0, it is determined that the glue layer thickness D of the glue-coated area of ​​the optical element in the target working scenario is greater than 140 μm.

6. An optical element, characterized in that: A glue coating area is provided on the optical element, and the minimum area of ​​the glue coating area is obtained by the method for determining the minimum area of ​​the glue coating area of ​​an optical element according to any one of claims 1 to 5.

7. The optical element according to claim 6, wherein At least a portion of the surface of the optical element is a coating surface, and the glue-coated area is arranged on the coating surface.

8. A laser emitting device, characterized in that: The optical element comprises a light source and the optical element as claimed in claim 6 or 7, wherein the optical element is used to process the light beam emitted by the light source.

9. A computing device, characterized in that include: A processor, a memory, a communication interface, and a communication bus, wherein the processor, the memory, and the communication interface communicate with each other via the communication bus; The memory is used to store executable instructions, and the executable instructions enable the processor to perform the operation of the method for determining the minimum area of ​​the glue-coated region of an optical element as described in any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that The storage medium stores executable instructions, which, when executed on a computing device, enable the computing device to perform the operation of the method for determining the minimum area of ​​a glue-coated region of an optical element according to any one of claims 1 to 5.

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