Preparation method and device of optical element, readable storage medium and imaging module

Abstract

The invention discloses a preparation method and device of an optical element, a readable storage medium and an imaging module, and relates to the technical field of optics. The preparation method of the optical element comprises the following steps: acquiring a first prism and a second prism, and determining a combined contact surface on the first prism; carrying out region division treatment on the combined contact surface to determine a film coating region in the combined contact surface; performing etching treatment on the film coating area so as to process the first prism into a third prism; performing thin film deposition treatment on the etched film coating area so as to process the third prism into a fourth prism; and combining the second prism on the combination contact surface of the fourth prism to obtain the optical element. The optical characteristics of the optical element are improved.

Description

Technical Field

[0001] This application relates to the field of optical technology, and in particular to a method for fabricating an optical element, an apparatus, a readable storage medium, and an imaging module. Background Technology

[0002] Currently, in high-end optical systems (such as space telescopes, high-resolution imaging systems, and high-energy laser systems) and precision imaging modules (such as periscope cameras), the interface quality, optical path purity, and thermal stability of optical components are key factors determining system performance. Traditional methods for fabricating optical components generally involve bonding multiple components together with adhesives. However, adhesive bonding processes have significant limitations in maintaining transmittance, stress control, and stray light suppression. Therefore, existing fabrication methods suffer from technical problems such as poor optical properties in the fabricated optical components. Summary of the Invention

[0003] This application provides a method, apparatus, readable storage medium, and imaging module for fabricating an optical element, which addresses technical problems such as poor optical properties of optical elements fabricated in the prior art.

[0004] A first aspect of this application provides a method for fabricating an optical element, comprising: Obtain the first prism and the second prism, and determine the mating contact surface on the first prism; The bonding contact surface is divided into regions to determine the coating area within the bonding contact surface; The coated area is etched to transform the first prism into a third prism; Thin film deposition is performed on the etched coating area to process the third prism into a fourth prism. The second prism is joined to the joint contact surface of the fourth prism to obtain an optical element.

[0005] In some embodiments, a second prism is coupled to the coupling contact surface of a fourth prism to obtain an optical element, comprising: Obtain the scene temperature of the application scenario where the first and second prisms are located; The prism combination method was determined by comparing the scene temperature and the temperature threshold. Based on the prism bonding method, the second prism is bonded to the bonding contact surface of the fourth prism to obtain an optical element.

[0006] In some embodiments, the prism combination method is determined by comparing the scene temperature and a temperature threshold, including: Under the condition that the scene temperature is greater than or equal to the temperature threshold, the prism bonding method is determined to be chemical bonding. Under the condition that the scene temperature is less than the temperature threshold, the prism bonding method is determined to be a physical bonding method.

[0007] In some embodiments, when the prism bonding method is chemical bonding, based on the prism bonding method, the second prism is bonded to the bonding contact surface of the fourth prism to obtain an optical element, including: An activation layer is formed on the bonding contact surface of the fourth prism by plasma activation, so that the fourth prism can be processed into a fifth prism. Adjust the ambient pressure of the processing environment where the fifth prism is located; Under the condition that the ambient pressure is within the preset pressure range, the second prism is brought into contact with the bonding contact surface of the fifth prism so that hydrogen bonds are formed between the second prism and the fifth prism. The second and fifth prisms after contact are annealed to obtain optical elements.

[0008] In some embodiments, when the prism bonding method is a physical bonding method, based on the prism bonding method, the second prism is bonded to the bonding contact surface of the fourth prism to obtain an optical element, including: The contact surface of the fourth prism is polished to process the fourth prism into a sixth prism. When the surface roughness of the sixth prism is less than the roughness threshold, the second prism is brought into contact with the joint contact surface of the sixth prism, and the contacting second prism and the sixth prism are placed in a vacuum environment. The second and sixth prisms in a vacuum environment are subjected to isothermal heat treatment to obtain optical elements.

[0009] In some embodiments, etching is performed on the coated area to process the first prism into a third prism, including: Based on the preset etching depth, the coating area is etched to process the first prism into the seventh prism. The etched coating area is polished to transform the seventh prism into a third prism.

[0010] In some embodiments, a thin film deposition process is performed on the etched coating area to process the third prism into a fourth prism, including: Prepare optical thin films with the functions of absorbing and reflecting stray light; An optical thin film is deposited on the etched coating area to process the third prism into a fourth prism.

[0011] The method for fabricating the optical element in this embodiment fabricates the second prism and the fourth prism into an optical element without the need for an additional adhesive layer. This improves the light transmittance of the optical element, while also enhancing its stress control and stray light suppression capabilities, thereby improving the optical properties of the optical element.

[0012] A second aspect of this application provides another apparatus for fabricating an optical element, including a processor and a memory. The memory stores a computer program, which, when executed by the processor, implements the steps of the optical element fabrication method as described in any of the above embodiments. Therefore, this apparatus for fabricating an optical element possesses all the beneficial effects of the optical element fabrication method in any of the above embodiments, and will not be elaborated further here.

[0013] A third aspect of this application provides a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the optical element fabrication method as described in any of the above embodiments. Therefore, this readable storage medium possesses all the beneficial effects of the optical element fabrication method in any of the above embodiments, which will not be elaborated further here.

[0014] According to a fourth aspect of the present invention, an imaging module is provided, comprising: an optical element prepared by the method for preparing an optical element as defined in the first aspect above, and thus having all the beneficial technical effects of the method for preparing an optical element as defined in the first aspect above, which will not be elaborated further here. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A flowchart illustrating the fabrication method of the optical element provided in the embodiments of this application; Figure 2 A schematic diagram of the first prism provided in an embodiment of this application; Figure 3 A functional block diagram of the apparatus for fabricating optical elements provided in the embodiments of this application; Figure 4 This is a structural block diagram of the apparatus for fabricating optical elements provided in the embodiments of this application. Detailed Implementation

[0017] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0018] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0019] In some embodiments, such as Figure 1 As shown, an embodiment of this application provides a method for fabricating an optical element, comprising: Step S101: Obtain the first prism and the second prism, and determine the mating contact surface on the first prism; Step S102: Perform region division processing on the bonding contact surface to determine the coating area in the bonding contact surface; Step S103: Etch the coated area to process the first prism into a third prism; Step S104: Perform thin film deposition on the etched coating area to process the third prism into a fourth prism; In step S105, the second prism is bonded to the bonding contact surface of the fourth prism to obtain an optical element.

[0020] In this embodiment, a method for fabricating an optical element is proposed, wherein the optical element is a component made of a transparent material (such as glass, crystal, etc.) and is capable of transmitting, refracting or reflecting light.

[0021] For example, the optical element can be a quadrangular prism formed by splicing two triangular prisms, and the cross section of the quadrangular prism can be trapezoidal or parallelogram.

[0022] For example, optical elements can be used in periscope cameras for mobile phones, space telescopes, high-resolution imaging systems, or high-energy laser systems.

[0023] Obtain two preset prisms and designate them as the first prism and the second prism, respectively. The first prism and the second prism are two independent base prisms.

[0024] For example, the first prism and the second prism can both be triangular prisms, and the cross-sections of the first prism and the second prism are triangular.

[0025] One side of the first prism is defined as the bonding contact surface, which is the contact surface on the first prism used to bond with other prisms.

[0026] For example, the first prism includes multiple refractive surfaces, and the contact surface can be any one of the multiple refractive surfaces.

[0027] The bonding contact surface is divided into regions to determine the coating area in the bonding contact surface, wherein the coating area is the area used for coating.

[0028] For example, such as Figure 2 As shown, the bonding contact surface of the first prism is divided into two regions, namely the coating region A and the bonding region B. The coating region A is distributed around the bonding region B. The bonding region B is used to transmit effective light, and the coating on the coating region A is used to absorb stray light and other ineffective light.

[0029] The coated area of ​​the first prism is etched to process the first prism into a third prism, wherein the third prism is the prism after etching.

[0030] For example, by etching the coating area of ​​the first prism, a third prism with a stepped coating area can be obtained.

[0031] Thin film deposition is performed on the etched coating area to process the third prism into a fourth prism, wherein the third prism is the prism after coating treatment.

[0032] For example, depositing a film of a set thickness on the etched coating area can transform the stepped coating area into a planar coating area, so that the third prism can be processed into a fourth prism.

[0033] The second prism is joined to the joint contact surface of the fourth prism to obtain an optical element.

[0034] For example, based on the fourth prism, the second prism and several other prisms can be combined into an optical element.

[0035] It should be noted that in this embodiment, the bonding contact surface of the first prism is successively etched and then thin film deposited, enabling the first prism to be processed into a fourth prism. The second and fourth prisms are then spliced ​​together to form an optical element. This process avoids the use of adhesive in the bonding process of optical elements, thus avoiding technical problems such as reduced light transmittance and inability to suppress stray light associated with adhesives. Furthermore, since the second and fourth prisms are made of the same material, the introduction of heterogeneous interfaces into the optical element is avoided, thereby improving the light transmittance of the optical element.

[0036] It should also be noted that the optical element prepared in this application does not require an additional adhesive layer, ensuring low optical path loss. Furthermore, no other materials are introduced into the optical element, thus ensuring a matching coefficient of thermal expansion and guaranteeing the long-term stability of the optical element.

[0037] The method for fabricating the optical element in this embodiment fabricates the second prism and the fourth prism into an optical element without the need for an additional adhesive layer. This improves the light transmittance of the optical element, while also enhancing its stress control and stray light suppression capabilities, thereby improving the optical properties of the optical element.

[0038] In some embodiments, this application provides a method for fabricating an optical element, comprising bonding a second prism to the bonding contact surface of a fourth prism to obtain an optical element, including: Step S201: Obtain the scene temperature of the application scene where the first prism and the second prism are located; Step S202: Determine the prism combination method by comparing the scene temperature and the temperature threshold; Step S203: Based on the prism bonding method, the second prism is bonded to the bonding contact surface of the fourth prism to obtain an optical element.

[0039] In this embodiment, the scene temperature of the application scenario where the first prism and the second prism are located is obtained, wherein the scene temperature is the required temperature of the application scenario where the first prism and the second prism are located.

[0040] For example, the scene temperature can be the required temperature for the application scenarios of the first and second prisms.

[0041] For example, the application scenarios of the first prism and the second prism can be normal temperature scenarios, low temperature scenarios, or high temperature scenarios. The normal temperature scenario corresponds to a temperature of 20 degrees Celsius to 25 degrees Celsius, the low temperature scenario corresponds to a temperature of -30 degrees Celsius to -25 degrees Celsius, and the high temperature scenario corresponds to a temperature of 70 degrees Celsius to 75 degrees Celsius.

[0042] Obtain a preset temperature threshold, where the temperature threshold is used to distinguish different processes.

[0043] By comparing the scene temperature and the temperature threshold, the prism bonding method corresponding to the scene temperature is determined. The prism bonding method refers to the bonding process of the second prism and the fourth prism.

[0044] Based on the prism bonding method, the second prism is bonded to the bonding contact surface of the fourth prism to obtain an optical element.

[0045] For example, under different temperature requirements in different scenarios, different prism combination methods are used to combine the second prism and the fourth prism into an optical element.

[0046] In some embodiments, this application provides a method for fabricating an optical element, which determines the prism bonding method by comparing a scene temperature and a temperature threshold, including: Step S301: Under the condition that the scene temperature is greater than or equal to the temperature threshold, determine that the prism bonding method is a chemical bonding method. Step S302: Under the condition that the scene temperature is less than the temperature threshold, determine that the prism bonding method is a physical bonding method.

[0047] In this embodiment, the scene temperature and the temperature threshold are compared. If the scene temperature is greater than or equal to the temperature threshold, the prism bonding method is determined to be a chemical bonding method, wherein the chemical bonding method is a method of bonding the prism using a chemical method.

[0048] For example, the chemical bonding method can be specifically a low-temperature bonding method, wherein the low-temperature bonding method is a process that achieves a highly reliable connection between materials through the reaction of chemical groups under low-temperature conditions.

[0049] Under the condition that the scene temperature is less than the temperature threshold, the prism bonding method is determined to be a physical bonding method, where the physical bonding method is the method of bonding the prism using physical methods.

[0050] For example, the physical bonding method can be specifically a photoadhesive bonding method, wherein the photoadhesive bonding method is an adhesive-free process that relies on the molecular attraction of polished surfaces to bond optical components.

[0051] In some embodiments, this application provides a method for fabricating an optical element. When the prism bonding method is chemical bonding, a second prism is bonded to the bonding contact surface of a fourth prism based on the prism bonding method to obtain an optical element, comprising: Step S401: An activation layer is formed on the bonding contact surface of the fourth prism by plasma activation, so that the fourth prism is processed into a fifth prism. Step S402: Adjust the ambient pressure of the processing environment where the fifth prism is located; Step S403: Under the condition that the ambient pressure is within the preset pressure range, the second prism is brought into contact with the bonding contact surface of the fifth prism so that hydrogen bonds are formed between the second prism and the fifth prism. In step S404, the second and fifth prisms after contact are annealed to obtain optical elements.

[0052] In this embodiment, when the prism bonding method is chemical bonding, the bonding contact surface of the fourth prism is subjected to material activation treatment to form an activation layer on the bonding contact surface of the fourth prism, so that the fourth prism is processed into a fifth prism, wherein the fifth prism is the prism after activation treatment.

[0053] For example, the material activation treatment can be vacuum ultraviolet activation, chemical activation, or plasma activation.

[0054] For example, material activation treatment of the bonding contact surface of the fourth prism can activate the hydroxyl groups on the bonding contact surface, significantly increasing the surface energy and facilitating the subsequent bonding process. The entire process does not require the introduction of an active intermediate layer, directly stimulating the active sites of the glass material itself, thus avoiding the problem of thermal expansion mismatch caused by the introduction of new materials.

[0055] Adjust the ambient pressure of the processing environment where the fifth prism is located. Under the condition that the ambient pressure is within the preset pressure range, place the second prism in contact with the bonding contact surface of the fifth prism so that hydrogen bonds are formed between the second prism and the fifth prism. Here, the ambient pressure is the pressure of the processing environment where the fifth prism is located.

[0056] For example, a hydrogen bond is a special type of intermolecular force, essentially a combination of electrostatic attraction and weak covalent bonding. When a hydrogen atom (H) forms a strong polar bond (Xδ-–Hδ) with a highly electronegative atom (X=F / O / N), it creates a strong polar bond. + When the positively charged hydrogen atom (H) attracts a more electronegative atom with a lone pair of electrons from another molecule (Y = F / O / N), an X-H…Y structure is formed.

[0057] For example, the preset pressure range can be specifically 0.1~0.5MPa.

[0058] For example, the bonding stage involves a pre-bonding treatment performed in a clean environment, where precisely controlled pressure causes the two bonding surfaces to come together and initially form hydrogen bonds.

[0059] The second and fifth prisms after contact are annealed to obtain optical elements.

[0060] For example, the annealing process can be an annealing process at a temperature below 150 degrees Celsius.

[0061] For example, under the protection of an inert atmosphere, the second and fifth prisms after contact are annealed at a temperature below 150°C to induce the dehydration condensation of surface hydroxyl groups to form covalent bonds, thereby achieving a high-strength, low-thermal-damage optical bonding interface.

[0062] In some embodiments, this application provides a method for fabricating an optical element. When the prism bonding method is a physical bonding method, a second prism is bonded to the bonding contact surface of a fourth prism based on the prism bonding method to obtain an optical element, including: Step S501: Polish the contact surface of the fourth prism to process the fourth prism into a sixth prism. Step S502: When the surface roughness of the sixth prism is less than the roughness threshold, the second prism is brought into contact with the joint contact surface of the sixth prism, and the contacting second prism and the sixth prism are placed in a vacuum environment. Step S503: The second and sixth prisms in the vacuum environment are subjected to constant temperature heat treatment to obtain the optical element.

[0063] In this embodiment, when the prisms are physically joined, the joint contact surface of the fourth prism is polished to process the fourth prism into a sixth prism.

[0064] For example, in order to ensure that the fourth prism can be bonded by van der Waals forces, the bonding contact surface of the fourth prism needs to be further polished. Van der Waals forces are weak interaction forces that are ubiquitous between molecules or atoms. They are essentially a combination of electrostatic attraction and instantaneous dipole moment, and they mainly function by affecting the aggregation state and physical properties of matter.

[0065] The surface roughness of the sixth prism is detected. If the surface roughness of the sixth prism is less than the roughness threshold, the second prism is brought into contact with the joint contact surface of the sixth prism, and the contacting second prism and the sixth prism are placed in a vacuum environment. The roughness threshold is a preset roughness threshold.

[0066] For example, the roughness threshold can be 0.1 nm.

[0067] The second and sixth prisms in a vacuum environment are subjected to isothermal heat treatment to obtain optical elements.

[0068] For example, in a vacuum environment (pressure < 5 × 10⁻⁶), -6 Under controlled conditions (Pa), the bonding surfaces are slowly brought together, and initial bonding is achieved through van der Waals forces and electrostatic adsorption. Subsequently, heat treatment is performed at a stable temperature of 30-50 degrees Celsius to enhance the bonding strength and long-term stability of the interface.

[0069] For example, the optical components combined in this embodiment exhibit excellent optical performance in mobile phone periscope camera modules. No radiating stray light was observed in the actual images captured by the module, and the image quality is significantly superior to traditional adhesive bonding methods. Furthermore, after rigorous reliability tests including high temperature and humidity and thermal shock, the prisms bonded by the optical adhesive method demonstrated excellent stability, fully meeting industrial standard requirements. In terms of mechanical performance, the three-point bend test showed a thrust >20N, indicating high mechanical strength that meets the mechanical requirements of practical applications. Simultaneously, tests on the visible light transmittance and reflectance of the optical components showed that their optical performance fully meets design expectations.

[0070] In some embodiments, this application provides a method for fabricating an optical element, which involves etching a coated area to fabricate a first prism into a third prism, comprising: Step S601: Based on the preset etching depth, the coating area is etched to process the first prism into the seventh prism. Step S602: Polish the etched coating area to process the seventh prism into a third prism.

[0071] In this embodiment, the coating area is etched based on a preset etching depth so that the first prism is processed into a seventh prism. The etching depth is the depth value in the etching process, and the seventh prism is the prism that has been etched.

[0072] For example, the etching depth can be 0.5 μm.

[0073] For example, a photolithography process is first performed on the bonding contact surface. The position and pattern of the coating area are precisely defined by mask design and ultraviolet exposure technology, and photoresist is coated to form an anti-etching pattern. Subsequently, reactive ion etching technology is used to process the coating area to a fixed depth, so that the height difference is controlled at the micrometer level (less than 1 μm, and the step height is monitored online using an interferometer), forming a step structure.

[0074] The etched coating area is polished to transform the seventh prism into a third prism.

[0075] For example, this stepped microstructure enables physical separation of the bonding region and the functional film layer region, effectively blocking stray light from entering the optical path while preventing the coating from affecting the optical performance of the bonding interface. To ensure that the bonding region has excellent optical contact performance, its surface is further subjected to ultra-precision polishing, so that its surface roughness Ra is controlled at the nanometer level (Ra≤0.5nm), creating ideal conditions for subsequent molecular-level bonding.

[0076] In some embodiments, this application provides a method for fabricating an optical element, which involves performing thin film deposition on an etched coating area to fabricate a third prism into a fourth prism, comprising: Step S701: Prepare an optical thin film with the function of absorbing and reflecting stray light; Step S702: Deposit an optical thin film on the etched coating area to process the third prism into a fourth prism.

[0077] In this embodiment, an optical thin film with the function of absorbing and reflecting stray light is prepared.

[0078] For example, the optical film can be a selective film.

[0079] For example, the optical film can be a neutral density film.

[0080] An optical thin film is deposited on the etched coating area to process the third prism into a fourth prism.

[0081] For example, a neutral density film or other optical thin film with absorption / reflection functions is deposited on the coated area of ​​the formed stepped structure to effectively block stray light. This film layer works synergistically with the stepped structure to improve the imaging contrast and system stability of the entire optical assembly. The film deposition process used must possess good adhesion, thermal stability, and spectral selectivity to meet the requirements of practical optical applications.

[0082] In some embodiments, such as Figure 3 As shown, an embodiment of this application provides an optical element fabrication apparatus 800, comprising: Acquisition unit 802 is used to acquire the first prism and the second prism, and to determine the mating contact surface on the first prism; Processing unit 804 is used to perform region division processing on the bonding contact surface to determine the coating area in the bonding contact surface; Control unit 806 is used to etch the coating area so that the first prism is processed into the third prism; The control unit 806 is used to perform thin film deposition on the etched coating area so that the third prism can be processed into a fourth prism. Control unit 806 is used to attach the second prism to the contact surface of the fourth prism to obtain an optical element.

[0083] In this embodiment, an optical element fabrication apparatus 800 is proposed, wherein the optical element is a component made of a transparent material (such as glass, crystal, etc.) and is capable of transmitting, refracting or reflecting light.

[0084] For example, the optical element can be a quadrangular prism formed by splicing two triangular prisms, and the cross section of the quadrangular prism can be trapezoidal or parallelogram.

[0085] For example, optical elements can be used in periscope cameras for mobile phones, space telescopes, high-resolution imaging systems, or high-energy laser systems.

[0086] Obtain two preset prisms and designate them as the first prism and the second prism, respectively. The first prism and the second prism are two independent base prisms.

[0087] For example, the first prism and the second prism can both be triangular prisms, and the cross-sections of the first prism and the second prism are triangular.

[0088] One side of the first prism is defined as the bonding contact surface, which is the contact surface on the first prism used to bond with other prisms.

[0089] For example, the first prism includes multiple refractive surfaces, and the contact surface can be any one of the multiple refractive surfaces.

[0090] The bonding contact surface is divided into regions to determine the coating area in the bonding contact surface, wherein the coating area is the area used for coating.

[0091] For example, such as Figure 2 As shown, the bonding contact surface of the first prism is divided into two regions, namely the coating region A and the bonding region B. The coating region A is distributed around the bonding region B. The bonding region B is used to transmit effective light, and the coating on the coating region A is used to absorb stray light and other ineffective light.

[0092] The coated area of ​​the first prism is etched to process the first prism into a third prism, wherein the third prism is the prism after etching.

[0093] For example, by etching the coating area of ​​the first prism, a third prism with a stepped coating area can be obtained.

[0094] Thin film deposition is performed on the etched coating area to process the third prism into a fourth prism, wherein the third prism is the prism after coating treatment.

[0095] For example, depositing a film of a set thickness on the etched coating area can transform the stepped coating area into a planar coating area, so that the third prism can be processed into a fourth prism.

[0096] The second prism is joined to the joint contact surface of the fourth prism to obtain an optical element.

[0097] For example, based on the fourth prism, the second prism and several other prisms can be combined into an optical element.

[0098] It should be noted that in this embodiment, the bonding contact surface of the first prism is successively etched and then thin film deposited, enabling the first prism to be processed into a fourth prism. The second and fourth prisms are then spliced ​​together to form an optical element. This process avoids the use of adhesives, thus avoiding the technical problems associated with adhesives, such as reduced light transmittance and inability to suppress stray light. Furthermore, since the second and fourth prisms are made of the same material, heterogeneous interfaces are avoided in the optical element, improving its light transmittance.

[0099] It should also be noted that the optical element prepared in this application does not require an additional adhesive layer, ensuring low optical path loss. Furthermore, no other materials are introduced into the optical element, thus ensuring a matching coefficient of thermal expansion and guaranteeing the long-term stability of the optical element.

[0100] The optical element fabrication apparatus 800 in this embodiment fabricates the second prism and the fourth prism into optical elements without the need for an additional adhesive layer, thereby improving the light transmittance of the optical elements, as well as the stress control and stray light suppression capabilities of the optical elements, and thus improving the optical characteristics of the optical elements.

[0101] In some embodiments of this application, an apparatus 800 for fabricating an optical element is provided, comprising: The acquisition unit 802 is used to acquire the scene temperature of the application scene where the first prism and the second prism are located; Processing unit 804 is used to determine the prism combination method by comparing scene temperature and temperature threshold; Control unit 806 is used to combine a second prism onto the bonding contact surface of a fourth prism based on a prism bonding method to obtain an optical element.

[0102] In some embodiments of this application, an apparatus 800 for fabricating an optical element is provided, comprising: The processing unit 804 is used to determine that the prism bonding method is a chemical bonding method when the scene temperature is greater than or equal to a temperature threshold. The processing unit 804 is used to determine that the prism bonding method is a physical bonding method when the scene temperature is less than the temperature threshold.

[0103] In some embodiments of this application, an apparatus 800 for fabricating an optical element is provided, comprising: Control unit 806 is used to form an activation layer on the bonding contact surface of the fourth prism by plasma activation, so that the fourth prism can be processed into a fifth prism; Control unit 806 is used to adjust the ambient pressure of the processing environment where the fifth prism is located; The control unit 806 is used to contact the second prism with the joint contact surface of the fifth prism under the condition that the ambient pressure is within a preset pressure range, so as to form hydrogen bonds between the second prism and the fifth prism. Control unit 806 is used to anneal the second and fifth prisms after contact to obtain optical elements.

[0104] In some embodiments of this application, an apparatus 800 for fabricating an optical element is provided, comprising: Control unit 806 is used to polish the mating contact surface of the fourth prism so that the fourth prism can be processed into a sixth prism; The control unit 806 is used to contact the second prism with the joint contact surface of the sixth prism when the surface roughness of the sixth prism is less than the roughness threshold, and to place the contacting second prism and the sixth prism in a vacuum environment. Control unit 806 is used to perform isothermal heat treatment on the second and sixth prisms in a vacuum environment to obtain optical elements.

[0105] In some embodiments of this application, an apparatus 800 for fabricating an optical element is provided, comprising: Control unit 806 is used to etch the coating area based on a preset etching depth so that the first prism is processed into the seventh prism; Control unit 806 is used to polish the etched coating area so that the seventh prism can be processed into a third prism.

[0106] In some embodiments of this application, an apparatus 800 for fabricating an optical element is provided, comprising: Control unit 806 is used to prepare optical thin films with functions of absorbing and reflecting stray light; Control unit 806 is used to deposit an optical thin film on the etched coating area to process the third prism into a fourth prism.

[0107] In some embodiments, such as Figure 4 As shown, an optical element fabrication apparatus 900 is proposed. The optical element fabrication apparatus 900 includes a processor 902 and a memory 904. The memory 904 stores a computer program, which, when executed by the processor 902, implements the steps of the optical element fabrication method as described in any of the above embodiments. Therefore, this optical element fabrication apparatus 900 possesses all the beneficial effects of the optical element fabrication method in any of the above embodiments, which will not be elaborated further here.

[0108] In some embodiments, a readable storage medium is provided having a program stored thereon, which, when executed by a processor, implements the steps of the method for fabricating an optical element as described in any of the above embodiments, and thus has all the beneficial technical effects of the method for fabricating an optical element as described in any of the above embodiments.

[0109] In some embodiments, an imaging module is provided, comprising: an optical element prepared by the optical element preparation method of any of the above embodiments, and thus having all the beneficial technical effects of the optical element preparation method of any of the above embodiments, which will not be elaborated further here.

[0110] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0111] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-readable program code.

[0112] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0113] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0114] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0115] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to perform a process for fabricating an optical element.

[0116] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0117] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0118] In the several embodiments provided in this application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms.

[0119] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0120] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0121] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0122] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0123] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0124] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A method for fabricating an optical element, characterized in that, The method includes: Obtain the first prism and the second prism, and determine the mating contact surface on the first prism; The bonding contact surface is divided into regions to determine the coating area within the bonding contact surface. The coated area is etched to process the first prism into a third prism; The etched coating area is subjected to thin film deposition to process the third prism into a fourth prism. The second prism is joined to the joint contact surface of the fourth prism to obtain an optical element.

2. The method according to claim 1, characterized in that, The step of bonding the second prism to the bonding contact surface of the fourth prism to obtain an optical element includes: Obtain the scene temperature of the application scenario where the first prism and the second prism are located; The prism combination method is determined by comparing the scene temperature with the temperature threshold. Based on the prism bonding method, the second prism is bonded to the bonding contact surface of the fourth prism to obtain the optical element.

3. The method according to claim 2, characterized in that, The step of determining the prism combination method by comparing the scene temperature with a temperature threshold includes: Under the condition that the scene temperature is greater than or equal to the temperature threshold, the prism bonding method is determined to be a chemical bonding method; Under the condition that the scene temperature is less than the temperature threshold, the prism bonding method is determined to be a physical bonding method.

4. The method according to claim 3, characterized in that, When the prism bonding method is the chemical bonding method, the step of bonding the second prism to the bonding contact surface of the fourth prism based on the prism bonding method to obtain the optical element includes: An activation layer is formed on the bonding contact surface of the fourth prism by plasma activation, so that the fourth prism is processed into a fifth prism; Adjust the ambient pressure of the processing environment where the fifth prism is located; Under the condition that the ambient pressure is within a preset pressure range, the second prism is brought into contact with the bonding contact surface of the fifth prism, so that hydrogen bonds are formed between the second prism and the fifth prism; The second and fifth prisms, after contact, are annealed to obtain the optical element.

5. The method according to claim 3, characterized in that, When the prism bonding method is the physical bonding method, the step of bonding the second prism to the bonding contact surface of the fourth prism based on the prism bonding method to obtain the optical element includes: The contact surface of the fourth prism is polished to process the fourth prism into a sixth prism; When the surface roughness of the sixth prism is less than the roughness threshold, the second prism is brought into contact with the joint contact surface of the sixth prism, and the contacting second prism and the sixth prism are placed in a vacuum environment. The second prism and the sixth prism in a vacuum environment are subjected to isothermal heat treatment to obtain the optical element.

6. The method according to any one of claims 1 to 5, characterized in that, The etching process performed on the coated area to process the first prism into a third prism includes: Based on a preset etching depth, the coating area is etched to process the first prism into a seventh prism. The etched coating area is polished to transform the seventh prism into the third prism.

7. The method according to any one of claims 1 to 5, characterized in that, The step of performing thin film deposition on the etched coating area to process the third prism into a fourth prism includes: Prepare optical thin films with the functions of absorbing and reflecting stray light; The optical thin film is deposited on the etched coating area to process the third prism into the fourth prism.

8. An apparatus for fabricating an optical element, characterized in that, include: processor; A memory, which stores programs or instructions, wherein a processor, when executing the programs or instructions in the memory, implements the steps of the method for fabricating an optical element as described in any one of claims 1 to 7.

9. A readable storage medium, characterized in that, A program or instructions are stored on a readable storage medium, which, when executed by a processor, implement the steps of the method for preparing an optical element as described in any one of claims 1 to 7.

10. An imaging module, characterized in that, The imaging module includes: An optical element, wherein the optical element is prepared by the method of preparing an optical element as described in any one of claims 1 to 7.

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