Optical element curvature detection method, device, apparatus and readable storage medium

Abstract

The application provides an optical element curvature detection method, device, equipment and readable storage medium. When a small specification optical element needs to be tested, the optical element measurement device provided by the application has simple structure, convenient installation, simple operation and fine process, can be applied to measurement of small specification optical elements, the process design can meet the high-precision ball diameter instrument measurement ring parallelism standard, and the measurement accuracy of small specification products can be effectively improved. Further, the detection method provided by the embodiment of the application is simple to operate, and the optical element measurement device provided by the embodiment of the application can effectively improve the measurement efficiency and measurement accuracy of the product to be detected.

Description

Technical Field

[0001] This application relates to the field of optical element testing technology, and in particular to a method, apparatus, device and readable storage medium for optical element curvature testing. Background Technology

[0002] Currently, the measurement of the curvature of concave and convex surfaces of infrared materials such as germanium, zinc selenide, and chalcogenide glass mainly adopts the spherical diameter measuring method. It can meet the needs of high-precision measurement, specifically reaching 0.1μm. The range of measurable concave surface curvature is -6mm to ∞, and the range of convex surface curvature is +3mm to ∞. The diameter of the sample being measured ranges from 6mm to 150mm. It mainly consists of a measuring ring and an indicator. The measuring ring of this spherical diameter measuring instrument is divided into an inner ring and an outer ring, and the selection of the measuring ring can vary depending on the product specifications.

[0003] A sphere diameter meter is an instrument used to measure the radius of curvature of a sphere. It is usually a contact type, which calculates the spherical radius of the sphere segment by using the radius of the base circle and the sag of the segment. Existing sphere diameter meters test the curvature of a sphere by changing different types of measuring rings or pointers. The stability of the connection can affect the stability of the sphere, thus affecting the curvature test results. However, for products with a diameter of about 10mm or a light transmission aperture of less than or equal to 5mm, current sphere diameter meters cannot meet the measurement needs of these small-sized products. The test is also cumbersome, time-consuming, and cannot be performed well. Summary of the Invention

[0004] This application aims to at least solve one of the aforementioned technical defects. In view of this, this application provides an optical element curvature detection method, apparatus, device, and readable storage medium to solve the technical defect in the prior art that makes it difficult to detect some small-sized optical elements.

[0005] A method for detecting the curvature of an optical element, comprising:

[0006] According to the test environment, install the optical element measuring device, which includes an indicator, a lens, and several probes of different types;

[0007] Based on the preset curvature range of the first optical element to be tested, a measurement ring and a standard sample that match the preset curvature range of the first optical element to be tested are determined.

[0008] Based on the diameter of the selected measuring ring and the preset curvature range of the first optical element to be tested, the standard curvature range of the first optical element to be tested is determined.

[0009] The selected measuring ring and probe are installed on the pointer bar of the optical element measuring device, wherein a gap is left when installing the probe so that the installed measuring ring can fully contact the lens when it contacts the lens of the optical element measuring device;

[0010] After performing preliminary rough processing on the first optical element to be tested, the actual curvature of the first optical element to be tested is measured using the optical element measuring device.

[0011] Determine whether the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested;

[0012] If the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested, then it is determined that the curvature of the first optical element to be tested meets the curvature requirement of the optical element, and the first optical element to be tested is further processed to obtain the second optical element to be tested.

[0013] Preferably, before performing preliminary rough processing on the first optical element to be tested, the method further includes:

[0014] Calculate the range of the sagittal difference of the first optical element to be detected;

[0015] Determine whether the elevation difference of the first optical element to be tested meets the elevation difference requirement of the optical element;

[0016] If the elevation difference of the first optical element to be tested meets the elevation difference requirement of the optical element, then the operation of performing preliminary rough processing on the first optical element to be tested is performed.

[0017] Preferably, the method further includes:

[0018] The actual curvature and center thickness of the second optical element to be tested are measured using the optical element measuring device.

[0019] Determine whether the actual curvature and center thickness of the second optical element to be tested meet the preset requirements;

[0020] If so, then determine the roughing requirements of the second optical element to be tested.

[0021] Preferably, the optical element measuring device further includes a guide sleeve and a guide cap sleeve;

[0022] Based on this, the optical element mounting measuring device includes:

[0023] The guide sleeve and guide sleeve cap of the optical element measuring device are fixed in front of the needle bar of the indicator;

[0024] Select a probe that matches the lens of the optical element measuring device;

[0025] Tighten the probe onto the needle bar of the indicator, and simultaneously lock the guide sleeve and guide sleeve cap, adjusting the distance between the probe and the indicator to a suitable level.

[0026] Preferably, the method further includes:

[0027] Before using the optical element measuring device to measure the actual curvature of the first optical element to be tested, the reset button of the optical element measuring device is clicked at multiple locations on the standard to calibrate the optical element measuring device.

[0028] An optical element curvature detection device, comprising:

[0029] The first mounting unit is used to mount an optical element measuring device according to the test environment, wherein the optical element measuring device includes an indicator, a lens, and several probes of different types;

[0030] The first determining unit is used to determine a measuring ring and a standard sample that match the preset curvature range of the first optical element to be tested, based on the preset curvature range of the first optical element to be tested.

[0031] The second determining unit is used to determine the standard curvature range of the first optical element to be tested based on the diameter of the selected measuring ring and the preset curvature range of the first optical element to be tested.

[0032] The second mounting unit is used to mount the selected measuring ring and probe on the pin bar of the indicator of the optical element measuring device, wherein a gap is required when mounting the probe so that the installed measuring ring can fully contact the lens when it contacts the lens of the optical element measuring device;

[0033] The first measurement unit is used to measure the actual curvature of the first optical element to be tested using the optical element measuring device after performing preliminary rough processing on the first optical element to be tested.

[0034] The first judgment unit is used to determine whether the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested;

[0035] The third determining unit is used to determine that the curvature of the first optical element to be tested meets the curvature requirements of the optical element when the execution result of the first determining unit determines that the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested, and to continue processing the first optical element to be tested to obtain the second optical element to be tested.

[0036] Preferably, the device further includes:

[0037] A calculation unit is used to calculate the range of the sagittal difference of the first optical element to be detected;

[0038] The second judgment unit is used to determine whether the sag difference of the first optical element to be tested meets the sag difference requirement of the optical element; if the sag difference of the first optical element to be tested meets the sag difference requirement of the optical element, then return to execute the operation of performing preliminary rough processing on the first optical element to be tested.

[0039] Preferably, the device further includes:

[0040] The second measurement unit is used to test the actual curvature and center thickness of the second optical element to be tested using the optical element measurement device.

[0041] The third judgment unit is used to determine whether the actual curvature and center thickness of the second optical element to be detected meet the preset requirements;

[0042] The fourth determining unit is used to determine the roughing requirements of the second optical element to be tested when the execution result of the third determining unit is yes.

[0043] An optical element curvature detection device includes: one or more processors, and a memory;

[0044] The memory stores computer-readable instructions that, when executed by the one or more processors, implement the steps of the optical element curvature detection method as described above.

[0045] A readable storage medium storing computer-readable instructions that, when executed by one or more processors, cause the one or more processors to perform the steps of the optical element curvature detection method as described in any of the foregoing descriptions.

[0046] As can be seen from the above-described technical solutions, when it is necessary to perform curvature testing on optical components, the method provided in this application embodiment can install an optical component measuring device according to the test environment. The optical component measuring device may include an indicator, a lens, and several probes of different models. Generally, the curvature range of an optical component is set according to design requirements at the initial design stage. Therefore, after installing the optical component measuring device, a measuring ring and a standard sample matching the preset curvature range of the first optical component to be tested can be determined based on the preset curvature range of the first optical component to be tested. This allows the selected measuring ring and standard sample to be used to test whether the curvature of the optical component to be tested meets the requirements. After determining the measuring ring and standard sample for the optical element to be tested, the standard curvature range of the first optical element to be tested can be further determined based on the diameter of the selected measuring ring and the preset curvature range of the first optical element to be tested. The selected measuring ring and probe are then installed on the pointer of the optical element measuring device. A gap must be left when installing the probe to ensure complete contact between the installed measuring ring and the lens of the optical element measuring device. When measuring the optical element, after preliminary rough machining of the first optical element to be tested, the actual curvature of the first optical element to be tested is measured using the optical element measuring device. It is then determined whether the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested. If the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested, it indicates that the preliminary rough machining of the first optical element to be tested meets the requirements. Therefore, it can be determined that the curvature of the first optical element to be tested meets the curvature requirements of the optical element, and the first optical element to be tested is further processed to obtain the second optical element to be tested.

[0047] As described above, the optical element measuring device provided in this application has a simple structure, is easy to install and operate, and is manufactured with high precision. It can be applied to the measurement of small-sized optical elements, and its process design meets the parallelism standards for high-precision sphere diameter measuring instruments, effectively improving the measurement accuracy of small-sized products. Furthermore, the method provided in this application embodiment is simple to operate, and using the optical element measuring device provided in this application embodiment can effectively improve the measurement efficiency and accuracy of the product to be tested. Attached Figure Description

[0048] 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 A flowchart illustrating a method for detecting the curvature of an optical element, provided as an embodiment of this application;

[0050] Figure 2 This is a schematic diagram of the structure of an optical element measuring device provided in an embodiment of this application;

[0051] Figure 3 A schematic diagram of the structure of the indicator table of the optical element measuring device provided in the embodiments of this application;

[0052] Figure 4 A schematic diagram of the guide sleeve of the optical element measuring device provided in the embodiments of this application;

[0053] Figure 5 A schematic diagram of the structure of the guide cap of the optical element measuring device provided in the embodiments of this application;

[0054] Figure 6 A schematic diagram of the pointer structure of the optical element measuring device provided in the embodiments of this application;

[0055] Figure 7 This is a schematic diagram of the lens structure of the optical element measuring device provided in the embodiments of this application;

[0056] Figure 8 This is a schematic diagram of the structure of an optical element curvature detection device as an example of an embodiment of this application;

[0057] Figure 9 This is a hardware structure block diagram of an optical element curvature detection device disclosed in an embodiment of this application. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] Given that most current equipment cooling solutions are ill-suited to complex and ever-changing business needs, this applicant has developed an optical element curvature detection scheme. This scheme provides an optical element measurement device with a simple structure, convenient installation, easy operation, and refined manufacturing process. It can be applied to the measurement of small-sized optical elements, and its process design meets the parallelism standards for high-precision sphere diameter measuring instruments, effectively improving the measurement accuracy of small-sized products. Furthermore, the method provided in this application is simple to operate, and using the optical element measurement device provided in this application can effectively improve the measurement efficiency and accuracy of the products under test.

[0060] The methods provided in this application can be used in a variety of general-purpose or special-purpose computing device environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor devices, distributed computing environments including any of the above devices, etc.

[0061] This application provides a method for detecting the curvature of an optical element. This method can be applied to various product measurement systems or product testing systems, as well as to various computer terminals or smart terminals. The executing entity can be the processor or server of the computer terminal or smart terminal.

[0062] The following is combined with Figure 1 This application describes the flow of the optical element curvature detection method according to embodiments, such as... Figure 1 As shown, the process may include the following steps:

[0063] Step S101: Install the optical component measuring device according to the test environment.

[0064] Specifically, in practical applications, the measurement of the curvature of concave and convex surfaces of infrared materials, such as germanium, zinc selenide, and chalcogenide glass, is mainly carried out using a sphere diameter meter. The sphere diameter meter method can meet the measurement needs of high-precision products, specifically reaching 0.1μm. It can measure the curvature of concave surfaces from -6mm to infinity and the curvature of convex surfaces from +3mm to infinity. The diameter of the sample being measured ranges from 6mm to 150mm. The commonly used sphere diameter meter mainly consists of a measuring ring and an indicator. The measuring ring of the sphere diameter meter can be divided into an inner ring and an outer ring, and different measuring rings can be selected according to the product specifications.

[0065] A sphere diameter meter is an instrument used to measure the radius of curvature of a sphere. The most common type of sphere diameter meter is the contact type. By using the radius of the base circle and the sag of the sphere, the radius of the sphere can be calculated.

[0066] Existing ball diameter meters can detect the curvature of a sphere by changing different types of measuring rings or pointers. The stability of the connection between the measuring ring and the pointer of the ball diameter meter will affect the stability of the sphere, and thus affect the curvature detection results.

[0067] In practical applications, when optical components are designed, the corresponding curvature range of concave and convex surfaces is usually given in the product's process drawings. Based on the curvature range of the optical component and the diameter of the measuring ring, the sagittal difference range can be calculated. The measuring ring can be selected to be close to 80% of the light transmission aperture. The standard sample is used to standardize the sphere diameter meter in order to obtain an accurate measurement of the product curvature. Therefore, the standard sample is selected to be close to the curvature.

[0068] However, traditional ball diameter meters cannot meet the measurement needs of some small-sized products, and the operation is also cumbersome and inefficient when testing products.

[0069] For example, traditional spherical diameter meters cannot meet the measurement needs of products with a diameter of about 10mm or a light transmission aperture of less than or equal to 5mm. They are also cumbersome to operate and have low efficiency when testing these products.

[0070] Therefore, for small-sized products with a diameter of about 10mm or a light-transmitting aperture of less than or equal to 5mm, measuring curvature requires the use of new measuring tools.

[0071] Based on this, embodiments of this application may provide an optical element measuring device for measuring small-sized optical elements.

[0072] in,

[0073] Figure 2 A schematic diagram of an optical element measuring device is shown.

[0074] like Figure 2 As shown, the optical element measuring device provided in this application embodiment may include an indicator, a lens, several probes of different models, a guide sleeve, and a guide cap.

[0075] Figures 3-7 The following are schematic diagrams illustrating the structures of various components of an optical element provided in the embodiments of this application.

[0076] in,

[0077] Figure 3 Example Figure 2 A schematic diagram of the indicator of the optical element measuring device shown;

[0078] Figure 3 The 01 in the text refers to Figure 2 The indicator of the optical element measuring device shown;

[0079] Figure 4Example Figure 2 The diagram shows the structure of the guide sleeve of the optical element measuring device.

[0080] Figure 4 The 02 in the text refers to Figure 2 The guide sleeve of the optical element measuring device shown;

[0081] Figure 5 Example Figure 2 A schematic diagram of the guide sleeve cap of the optical element measuring device shown;

[0082] Figure 5 The 03 in the text refers to Figure 2 The guide cap of the optical element measuring device shown;

[0083] Figure 6 Example Figure 2 The diagram shows the structure of the pointer in the optical element measuring device.

[0084] Figure 6 The 04 in the text refers to Figure 2 The pointer of the optical element measuring device shown;

[0085] Figure 7 Example Figure 2 A schematic diagram of the lens structure of the optical element measuring device shown;

[0086] Figure 7 The 05 in the text refers to Figure 2 The lens of the optical element measuring device shown;

[0087] In practical applications, when it is necessary to test whether the curvature of an optical element meets the requirements, the method provided in this application embodiment can install an optical element measuring device according to the test environment so that the optical element can be tested using the optical element measuring device.

[0088] The process of installing the optical element measuring device described above may include the following steps:

[0089] Step S1: Fix the guide sleeve and guide sleeve cap of the optical element measuring device in front of the pointer bar of the indicator.

[0090] in,

[0091] The guide sleeve of the optical element measuring device provided in this application embodiment is threaded, and an elastic groove is provided at the rear end of the thread of the guide sleeve using a cutting line, so that the guide sleeve and the guide sleeve cap have a certain elastic function, and one end of the guide sleeve and one end of the guide sleeve cap can be connected by threads, which can better cooperate with the guide sleeve cap and better lock the needle bar on the indicator. In addition, the guide sleeve and the guide sleeve cap can be locked together.

[0092] In practical applications, the distance between the guide sleeve and the guide sleeve cap assembly on the needle bar can be adjusted in real time according to the curvature of the lens, so as to better meet the measurement requirements.

[0093] The space for placing the measuring ring can be designed based on the front end of the guide sleeve.

[0094] For example, the outer diameter can be set to be greater than 4mm and less than or equal to 6mm; the inner diameter can be set to be less than or equal to 4mm and greater than 2mm. The purpose of this design is to allow the probe to be inserted smoothly and to measure the curvature of small-sized concave and convex surfaces, such as the concave curvature of germanium with a light-transmitting aperture of 4.5.

[0095] The front end of the guide sleeve can be designed to be coaxial with the inner and outer diameters of the measuring ring cylindrical surface.

[0096] The front end of the guide sleeve is designed to be parallel to the plane of the measuring ring and the plane of the standard measuring ring of the ball diameter meter. This is mainly to ensure the parallelism accuracy requirements, meet the parallelism standards of the measuring ring of high-precision ball diameter meters on the market, and improve the measurement accuracy.

[0097] Furthermore, the guide sleeve and guide sleeve cap each have a certain slope inside, and the threaded rear end of the guide sleeve cap also has a certain gap reserved, which facilitates the disassembly of the guide sleeve cap and also improves the fixing strength of the two.

[0098] Furthermore,

[0099] The material selected for machining the guide sleeve can be stainless steel. Stainless steel is hard and can ensure that the guide sleeve will not deform during long-term installation and disassembly, which helps to improve measurement accuracy and service life.

[0100] Step S2: Select a probe that matches the lens of the optical element measuring device.

[0101] In practical applications, the optical element measuring device provided in this application embodiment can have different types of probes so that products of different specifications can be tested.

[0102] Therefore, after fixing the guide sleeve and guide sleeve cap of the optical element measuring device in front of the pointer bar of the indicator, a matching probe can be selected according to the lens of the optical element measuring device.

[0103] The probe is mainly installed on the indicator. Probes come in various lengths and specifications.

[0104] The standard design of the pointer is that the fingertip size can be set to about 0.5mm and the finger head size can be set to about 2mm, so that it can be used with the measuring ring of the guide sleeve.

[0105] The commonly used ones are cylindrical probes, which have a diameter of 2mm and are inlaid with rubies at the tip. Their lengths are generally between 10mm and 20mm.

[0106] In practical applications, there are also elliptical probes. The diameter of elliptical probes is generally 0.5mm to 2mm (from bottom to top). The needle tip of the elliptical probe is designed to be arc-shaped or inlaid with rubies, and the length is about 13mm.

[0107] Installing rubies on the probe or designing the probe to be arc-shaped aims to improve the measurement accuracy of the probe and protect the lens surface from scratches, cracks, and other damage.

[0108] In practical applications, the probe should be selected according to the size of the lens. If the diameter of the optical measuring device is large, the probe that comes with a common spherical diameter meter can be selected. If it is for an optical measuring device with a lens aperture of less than or equal to 5mm, a probe with higher measurement accuracy can be selected, because a large-diameter measuring ring and probe cannot contact the entire curved surface of the lens, and the test results will not be accurate.

[0109] Furthermore,

[0110] Stainless steel can be used to make pointers. Stainless steel is hard, not easily deformed, and has high precision. Using stainless steel to make pointers can effectively improve their service life.

[0111] Step S3: Tighten the probe to the needle bar of the indicator, and simultaneously lock the guide sleeve and guide sleeve cap, adjusting the distance between the probe and the guide sleeve to a suitable level.

[0112] Tightening the probe onto the pointer bar of the dial indicator, while simultaneously locking the guide sleeve and guide sleeve cap, increases the stability of the optical component measuring device and helps improve its measurement accuracy. Adjusting the guide sleeve and guide sleeve cap to a suitable distance from the probe facilitates disassembly.

[0113] Step S102: Based on the preset curvature range of the first optical element to be tested, determine a measurement ring and a standard sample that match the preset curvature range of the first optical element to be tested.

[0114] Specifically, in practical applications, optical element measuring devices can be configured with measuring rings and standard samples of different specifications according to different product specifications.

[0115] Therefore, in order to improve the measurement accuracy of the optical element measuring device for the first optical element to be tested, a measuring ring and a standard sample that match the preset curvature range of the first optical element to be tested can be determined based on the preset curvature range of the first optical element to be tested, so that the first optical element to be tested can be tested using the selected measuring ring and standard sample.

[0116] Step S103: Determine the standard curvature range of the first optical element to be tested based on the diameter of the selected measuring ring and the preset curvature range of the first optical element to be tested.

[0117] Specifically, as described above, the method provided in this application embodiment can determine a measurement ring and a standard sample that match the preset curvature range of the first optical element to be tested, based on the preset curvature range of the first optical element to be tested.

[0118] Furthermore, in practical applications, optical elements of different specifications have different curvature ranges.

[0119] Therefore, after determining the measuring ring and the standard sample that match the preset curvature range of the first optical element to be tested, the standard curvature range of the first optical element to be tested can be further determined based on the diameter of the selected measuring ring and the preset curvature range of the first optical element to be tested, so that the curvature of the first optical element to be tested can be judged based on the standard curvature range of the first optical element to be tested to determine whether the curvature of the first optical element to be tested meets the requirements.

[0120] The calculation process for the standard curvature of optical elements includes the following:

[0121] First, based on the drawing, provide the concave and convex radii of curvature of the lens. Then, calculate the lens's sag difference using the following formula:

[0122] The formula for calculating the sagittal difference of a concave lens is as follows:

[0123]

[0124] The formula for calculating the sagittal difference of a convex lens is as follows:

[0125]

[0126] in,

[0127] Sag 凹 It can represent the sagittal difference of a concave lens, which refers to the height from the vertex of the spherical surface of the concave lens to the edge point;

[0128] Sag 凸 It can represent the sag difference of a convex lens, which refers to the height from the vertex of the spherical surface of the convex lens to the edge point;

[0129] CA can represent the aperture of a convex or concave lens;

[0130] R cc It can represent the radius of curvature of a concave lens;

[0131] R cxIt can represent the radius of curvature of a convex lens;

[0132] D can represent the diameter of a convex or concave lens;

[0133] After calculating the range of sagittal difference values ​​given in the lens drawings, the curvature, aperture, and lens diameter of the lens can be determined.

[0134] Then, the measuring ring of the measuring device is compared and calibrated with the standard sample; if the final calculated value is within the standard value range, it can be considered qualified.

[0135] Among them, the standard sample can be selected from those with curvature close to that of the optical element to be tested; the measuring ring (inner diameter) is selected to be close to 80% of the aperture CA.

[0136] Step S104: Install the selected measuring ring and probe on the pointer bar of the optical element measuring device.

[0137] Specifically, as can be seen from the above description, the method provided in the embodiments of this application can determine the standard curvature range of the first optical element to be detected.

[0138] Furthermore, after determining the standard curvature range of the first optical element to be tested, an optical element measuring device can be installed to prepare for starting the measurement of the first optical element to be tested.

[0139] Therefore, the selected measuring ring and probe can be mounted on the pointer of the indicator of the optical element measuring device.

[0140] When installing the probe, a gap must be left so that the installed measuring ring can fully contact the lens when it comes into contact with the lens of the optical element measuring device.

[0141] Step S105: Click the reset button of the optical element measuring device at multiple locations on the standard sample to calibrate the optical element measuring device.

[0142] Specifically, in practical applications, after the measuring device is installed, it is generally necessary to calibrate the installed measuring device.

[0143] Therefore, after installing the optical element measuring device, the reset button of the optical element measuring device can be clicked at multiple locations on the standard sample to calibrate the optical element measuring device and improve its accuracy.

[0144] Step S106: After performing preliminary rough processing on the first optical element to be tested, the actual curvature of the first optical element to be tested is measured using the optical element measuring device.

[0145] Specifically, in practical applications, after the measuring device is installed and calibrated, the first optical element to be tested can be preliminarily rough-processed before testing it. After the first optical element to be tested is preliminarily rough-processed, the actual curvature of the first optical element to be tested is measured using the optical element measuring device.

[0146] For example,

[0147] The convex lens to be tested can be roughened before using an optical element measuring device to perform preliminary testing.

[0148] Step S107: Determine whether the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested.

[0149] Specifically, as described above, the method provided in this application embodiment can measure the actual curvature of the first optical element to be tested using the optical element measuring device after the first optical element to be tested has undergone preliminary rough processing.

[0150] Since the standard curvature of the first optical element to be tested has been determined, in practical applications, after measuring the actual curvature of the first optical element to be tested using the optical element measuring device, it can be further determined whether the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested.

[0151] If the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested, then step S108 can be executed.

[0152] Step S108: Determine that the curvature of the first optical element to be tested meets the curvature requirement of the optical element, and continue to process the first optical element to be tested to obtain the second optical element to be tested.

[0153] Specifically, as described above, the method provided in this application embodiment can, after measuring the actual curvature of the first optical element to be tested using the optical element measuring device, further determine whether the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested.

[0154] If the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested, it indicates that the preliminary processing of the first optical element to be tested meets the requirements. Thus, it can be determined that the curvature of the first optical element to be tested meets the curvature requirements of the optical element, and the first optical element to be tested can be further processed to obtain the second optical element to be tested.

[0155] As can be seen from the above-described technical solutions, the optical element measuring device provided in this application embodiment has a simple structure, is easy to install and operate, and has a relatively refined process. It can be applied to the measurement of small-sized optical elements, and its process design can meet the parallelism standard of high-precision sphere diameter measuring instruments, effectively improving the measurement accuracy of small-sized products. Furthermore, the method provided in this application embodiment is simple to operate, and using the optical element measuring device provided in this application embodiment can effectively improve the measurement efficiency and accuracy of the product to be tested.

[0156] In practical applications, before performing preliminary rough processing on the optical element to be tested, it is necessary to determine whether the optical element meets the curvature requirements and whether it meets the sag-height difference requirements. Therefore, the method provided in this application embodiment can add a sag-height difference judgment process for the first optical element to be tested before performing preliminary rough processing on the first optical element to be tested. The process is described below and may include the following steps:

[0157] Step S201: Calculate the range of the sagittal difference of the first optical element to be detected.

[0158] Specifically, in practical applications, in addition to checking whether the curvature of the optical element under test meets the requirements, it is also necessary to check whether the sagittal difference of the optical element under test meets the requirements.

[0159] Therefore, after determining that the curvature of the first optical element to be tested meets the curvature requirements of the optical element, the range of the sag difference of the first optical element to be tested can be further calculated to determine whether the range of the sag difference of the first optical element to be tested meets the design requirements.

[0160] in,

[0161] The sag difference of an optical element refers to the height from the vertex of the lens to its edge.

[0162] The formula for calculating the sagittal difference of the first optical element to be detected may include the following:

[0163] The formula for calculating the sagittal difference of a concave lens is as follows:

[0164]

[0165] The formula for calculating the sagittal difference of a convex lens is as follows:

[0166]

[0167] in,

[0168] Sag 凹 It can represent the sagittal difference of a concave lens, which refers to the height from the vertex of the spherical surface of the concave lens to the edge point;

[0169] Sag 凸 It can represent the sag difference of a convex lens, which refers to the height from the vertex of the spherical surface of the convex lens to the edge point;

[0170] CA can represent the aperture of a convex or concave lens;

[0171] R cc It can represent the radius of curvature of a concave lens;

[0172] R cx It can represent the radius of curvature of a convex lens;

[0173] D can represent the diameter of a convex or concave lens.

[0174] Step S202: Determine whether the sag difference of the first optical element to be detected meets the sag difference requirement of the optical element.

[0175] Specifically, as can be seen from the above description, the method provided in this application embodiment can further calculate the range of the sagittal difference of the first optical element to be detected after determining that the curvature of the first optical element to be detected meets the curvature requirements of the optical element.

[0176] After determining the range of the sag difference of the first optical element to be tested, it can be determined whether the sag difference of the first optical element to be tested meets the sag difference requirement of the optical element.

[0177] in,

[0178] Depending on the product specifications, the curvature requirements vary. Whether the product's sag-height difference requirement is met determines whether the measured curvature range value of the product meets the product's requirements.

[0179] If the elevation difference of the first optical element to be tested meets the elevation difference requirement of the optical element, then the operation of performing preliminary rough processing on the first optical element to be tested can be performed.

[0180] As can be seen from the above-described technical solutions, before the optical element to be tested is subjected to preliminary rough processing, the method provided in this application embodiment can not only determine whether the optical element to be tested meets the curvature requirements of the optical element, but also determine whether the optical element to be tested meets the sagittal difference requirements of the optical element, so as to improve the processing efficiency and effect of the optical element to be tested.

[0181] In practical applications, the method provided in this application can not only detect whether the actual curvature of the pre-processed optical element meets the requirements, but also use the optical element to detect the actual curvature and center thickness of the optical element that has completed the preliminary rough processing, and determine whether the actual curvature and center thickness of the pre-processed optical element meet the requirements. The process is described below, and it may include the following steps:

[0182] Step S301: Use the optical element measuring device to test the actual curvature and center thickness of the second optical element to be tested.

[0183] Specifically, as can be seen from the above description, the method provided in the embodiments of this application can test whether the optical element undergoing preliminary processing meets the curvature requirements.

[0184] In practical applications, the method provided in this application embodiment can further determine whether the actual curvature and center thickness of the preliminary rough-processed optical element meet the requirements.

[0185] Therefore, after processing the first optical element to be tested to obtain the second optical element to be tested, the actual curvature and center thickness of the second optical element to be tested can be tested using the optical element measuring device, so as to determine whether the actual curvature and center thickness of the initially rough-processed optical element meet the requirements.

[0186] Step S302: Determine whether the actual curvature and center thickness of the second optical element to be tested meet the preset requirements.

[0187] Specifically, as can be seen from the above description, the method provided in this application embodiment can use an optical element measuring device to further test the actual curvature and center thickness of the second optical element to be tested.

[0188] After testing the actual curvature and center thickness of the second optical element to be tested, it can be determined whether the actual curvature and center thickness of the second optical element to be tested meet the preset requirements. If the actual curvature and center thickness of the second optical element to be tested meet the preset requirements, it can be determined that the second optical element to be tested meets the rough machining requirements of the optical element.

[0189] As can be seen from the above-described technical solutions, the method provided in this application embodiment can not only use an optical element measuring device to test whether the pre-processed optical element meets the curvature requirements, but also further test the actual curvature and center thickness of the optical element obtained from the preliminary rough processing, so as to determine whether the optical element obtained from the preliminary rough processing meets the rough processing requirements, and further improve the detection efficiency and detection effect of the optical element.

[0190] The following section uses germanium φ11.1*2.17 as an example to illustrate the implementation process of the method provided in this application.

[0191] The concave curvature of the product to be processed can be calculated and measured based on the convex design drawing of the product to be processed.

[0192] Before processing, the sagittal difference range of the convex lens to be processed can be calculated according to the drawing requirements. Since the specific curvature range of the convex lens to be processed is given in the drawing, a suitable measuring ring can be selected according to the curvature range of the convex lens to be processed. Generally, the measuring ring is usually 80% of the light transmission diameter, and the standard sample is selected to be close to the curvature of the convex lens to be processed.

[0193] After selecting a suitable measuring ring and standard sample, the standard curvature range of the convex lens to be processed can be calculated based on the diameter of the measuring ring and the curvature range of the convex lens.

[0194] After determining the standard curvature range of the convex lens to be processed, the selected measuring ring and probe can be installed on the indicator rod of the optical element measuring device, and they can cooperate with each other. The probe is left with a small gap so that the measuring ring can fully contact the lens when the probe contacts the lens for measurement.

[0195] Before using the optical element measuring device to measure the convex lens to be processed, the optical element measuring device can be calibrated by clicking the reset button at multiple locations on the standard sample.

[0196] Experiments show that after roughing the convex lens to be processed, the curvature can be measured to be -0.055 using an optical element measuring device. Since the calculated standard curvature range of the convex lens to be processed is -0.060 to -0.042, it can be determined that the curvature of the convex lens to be processed meets the requirements and processing can continue.

[0197] Furthermore, after the convex surface of the lens is processed, the actual curvature of the processed convex lens can be measured again, and then the center thickness of the processed convex lens can be measured to determine whether the actual curvature and center thickness of the processed convex lens meet the requirements.

[0198] The optical element curvature detection device provided in the embodiments of this application is described below. The optical element curvature detection device described below can be referred to in correspondence with the optical element curvature detection method described above.

[0199] See Figure 8 , Figure 8 This is a schematic diagram of the structure of an optical element curvature detection device disclosed in an embodiment of this application.

[0200] like Figure 8 As shown, the optical element curvature detection device may include:

[0201] The first mounting unit 101 is used to mount an optical element measuring device according to the test environment, wherein the optical element measuring device includes an indicator, a lens, and several probes of different types;

[0202] The first determining unit 102 is used to determine a measuring ring and a standard sample that match the preset curvature range of the first optical element to be tested, based on the preset curvature range of the first optical element to be tested.

[0203] The second determining unit 103 is used to determine the standard curvature range of the first optical element to be tested based on the diameter of the selected measuring ring and the preset curvature range of the first optical element to be tested.

[0204] The second mounting unit 104 is used to mount the selected measuring ring and probe on the pin bar of the indicator of the optical element measuring device, wherein a gap is reserved when mounting the probe so that the installed measuring ring can fully contact the lens when it contacts the lens of the optical element measuring device.

[0205] The first measuring unit 105 is used to measure the actual curvature of the first optical element to be tested after performing preliminary rough processing on the first optical element to be tested using the optical element measuring device.

[0206] The first judgment unit 106 is used to determine whether the actual curvature of the first optical element to be detected is within the standard curvature range of the first optical element to be detected.

[0207] The third determining unit 107 is used to determine that the curvature of the first optical element to be tested meets the curvature requirements of the optical element when the execution result of the first determining unit 106 determines that the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested, and to continue processing the first optical element to be tested to obtain the second optical element to be tested.

[0208] Further optionally, the device may also include:

[0209] A calculation unit is used to calculate the range of the sagittal difference of the first optical element to be detected;

[0210] The second judgment unit is used to determine whether the sag difference of the first optical element to be tested meets the sag difference requirement of the optical element; if the sag difference of the first optical element to be tested meets the sag difference requirement of the optical element, then return to execute the operation of performing preliminary rough processing on the first optical element to be tested.

[0211] Further optionally, the device may also include:

[0212] The second measurement unit is used to test the actual curvature and center thickness of the second optical element to be tested using the optical element measurement device.

[0213] The third judgment unit is used to determine whether the actual curvature and center thickness of the second optical element to be detected meet the preset requirements;

[0214] The fourth determining unit is used to determine the roughing requirements of the second optical element to be tested when the execution result of the third determining unit is yes.

[0215] The specific processing flow of each unit included in the aforementioned optical element curvature detection device can be found in the previous section on optical element curvature detection methods, and will not be repeated here.

[0216] The optical element curvature detection device provided in this application embodiment can be applied to optical element curvature detection equipment, such as terminals: mobile phones, computers, etc. Optionally, Figure 9 The hardware structure block diagram of the optical element curvature detection device is shown, with reference to... Figure 9 The hardware structure of an optical element curvature detection device may include: at least one processor 1, at least one communication interface 2, at least one memory 3, and at least one communication bus 4.

[0217] In this embodiment, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 communicate with each other through communication bus 4.

[0218] Processor 1 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 this application.

[0219] Memory 3 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device;

[0220] The memory stores a program, which the processor can call. The program is used to implement the various processing steps in the aforementioned terminal device cooling scheme.

[0221] This application embodiment also provides a readable storage medium that can store a program suitable for processor execution, the program being used to implement various processing flows of the aforementioned terminal in the device cooling scheme.

[0222] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply 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 limitations, 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.

[0223] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0224] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Various embodiments can be combined with each other. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting the curvature of an optical element, characterized in that, include: According to the testing environment, an optical element measuring device is installed, wherein the optical element measuring device includes an indicator, a lens, several probes of different models, a guide sleeve, and a guide cap. Based on this, the installation of the optical element measuring device includes: fixing the guide sleeve and guide cap of the optical element measuring device in front of the needle bar of the indicator; selecting a probe that matches the lens of the optical element measuring device; tightening the probe onto the needle bar of the indicator, while simultaneously locking the guide sleeve and guide cap, and adjusting the distance between the probe and the guide sleeve to a suitable level. Based on the preset curvature range of the first optical element to be tested, a measurement ring and a standard sample that match the preset curvature range of the first optical element to be tested are determined. Based on the diameter of the selected measuring ring and the preset curvature range of the first optical element to be tested, the standard curvature range of the first optical element to be tested is determined. The selected measuring ring and probe are installed on the pointer bar of the optical element measuring device, wherein a gap is left when installing the probe so that the installed measuring ring can fully contact the lens when it contacts the lens of the optical element measuring device; After performing preliminary rough processing on the first optical element to be tested, the actual curvature of the first optical element to be tested is measured using the optical element measuring device. Determine whether the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested; If the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested, then it is determined that the curvature of the first optical element to be tested meets the curvature requirement of the optical element, and the first optical element to be tested is further processed to obtain the second optical element to be tested.

2. The method according to claim 1, characterized in that, Before performing preliminary rough processing on the first optical element to be tested, the method further includes: Calculate the range of the sagittal difference of the first optical element to be detected; Determine whether the elevation difference of the first optical element to be tested meets the elevation difference requirement of the optical element; If the elevation difference of the first optical element to be tested meets the elevation difference requirement of the optical element, then the operation of performing preliminary rough processing on the first optical element to be tested is performed.

3. The method according to claim 1, characterized in that, The method also includes: The actual curvature and center thickness of the second optical element to be tested are measured using the optical element measuring device. Determine whether the actual curvature and center thickness of the second optical element to be tested meet the preset requirements; If so, then determine the roughing requirements of the second optical element to be tested.

4. The method according to claim 1, characterized in that, The method also includes: Before using the optical element measuring device to measure the actual curvature of the first optical element to be tested, the reset button of the optical element measuring device is clicked at multiple locations on the standard to calibrate the optical element measuring device.

5. An optical element curvature detection device, characterized in that, include: The first installation unit is used to install an optical element measuring device according to the test environment. The optical element measuring device includes an indicator, a lens, several probes of different models, a guide sleeve, and a guide cap. Based on this, the installation of the optical element measuring device includes: fixing the guide sleeve and guide cap of the optical element measuring device in front of the probe bar of the indicator; selecting a probe that matches the lens of the optical element measuring device; tightening the probe onto the probe bar of the indicator, while simultaneously locking the guide sleeve and guide cap, and adjusting the distance between the probe and the probe to a suitable level. The first determining unit is used to determine a measuring ring and a standard sample that match the preset curvature range of the first optical element to be tested, based on the preset curvature range of the first optical element to be tested. The second determining unit is used to determine the standard curvature range of the first optical element to be tested based on the diameter of the selected measuring ring and the preset curvature range of the first optical element to be tested. The second mounting unit is used to mount the selected measuring ring and probe on the pin bar of the indicator of the optical element measuring device, wherein a gap is required when mounting the probe so that the installed measuring ring can fully contact the lens when it contacts the lens of the optical element measuring device; The first measurement unit is used to measure the actual curvature of the first optical element to be tested using the optical element measuring device after performing preliminary rough processing on the first optical element to be tested. The first judgment unit is used to determine whether the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested; The third determining unit is used to determine that the curvature of the first optical element to be tested meets the curvature requirements of the optical element when the execution result of the first determining unit determines that the actual curvature of the first optical element to be tested is within the standard curvature range of the first optical element to be tested, and to continue processing the first optical element to be tested to obtain the second optical element to be tested.

6. The apparatus according to claim 5, characterized in that, The device also includes: A calculation unit is used to calculate the range of the sagittal difference of the first optical element to be detected; The second judgment unit is used to determine whether the sag difference of the first optical element to be tested meets the sag difference requirement of the optical element; if the sag difference of the first optical element to be tested meets the sag difference requirement of the optical element, then return to execute the operation of performing preliminary rough processing on the first optical element to be tested.

7. The apparatus according to claim 5, characterized in that, The device also includes: The second measurement unit is used to test the actual curvature and center thickness of the second optical element to be tested using the optical element measurement device. The third judgment unit is used to determine whether the actual curvature and center thickness of the second optical element to be detected meet the preset requirements; The fourth determining unit is used to determine the roughing requirements of the second optical element to be tested when the execution result of the third determining unit is yes.

8. An optical element curvature detection device, characterized in that, include: One or more processors, and memory; The memory stores computer-readable instructions that, when executed by the one or more processors, implement the steps of the optical element curvature detection method as described in any one of claims 1 to 4.

9. A readable storage medium, characterized in that: The readable storage medium stores computer-readable instructions that, when executed by one or more processors, cause the one or more processors to perform the steps of the optical element curvature detection method as described in any one of claims 1 to 4.

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