CN-121978785-A - Manufacturing method of double-sided cylindrical surface array convex lens

CN121978785ACN 121978785 ACN121978785 ACN 121978785ACN-121978785-A

Abstract

The application discloses a manufacturing method of a double-sided cylindrical surface array convex lens, which relates to the technical field of manufacturing of precision optical elements, and comprises the steps of calculating an assembly standard deviation based on historical production data of the double-sided cylindrical surface array convex lens; based on a normal distribution model, calculating a preset eccentric amount according to a preset qualified tolerance zone and the assembly standard deviation, preparing an upper lens plate and a lower lens plate in batches based on the preset eccentric amount, and sequentially carrying out involution and bonding on the upper lens plate and the lower lens plate to prepare the double-sided cylindrical array convex lenses in batches. The application converts the random error which cannot be eliminated into the controllable systematic error, thereby greatly improving the effective yield.

Inventors

RUAN BENSHUAI
Shao Yehua
LI SHENGWEI
SHI JINHUI
MA NAN

Assignees

超丰微纳科技(宁波)有限公司

Dates

Publication Date: 20260505
Application Date: 20260302

Claims (8)

1. A method of manufacturing a double sided cylindrical array convex lens, the method comprising: calculating an assembly standard deviation based on historical production data of the convex lenses of the double-sided cylindrical arrays; Based on a normal distribution model, calculating a preset eccentric amount according to a preset qualified tolerance zone and the assembly standard deviation; preparing an upper lens plate and a lower lens plate in batches based on the preset eccentric amount; And sequentially carrying out involution and bonding on the upper lens plate and the lower lens plate to prepare the double-sided cylindrical surface array convex lenses in batches.
2. The method for manufacturing the convex lens with the double-sided cylindrical surface array according to claim 1, wherein the preset eccentric amount is determined according to the deviation between the central position of the normal distribution model and an ideal zero point, wherein the ideal zero point is determined according to a preset qualified tolerance zone; The preset eccentric quantity is used for translating the total eccentric quantity probability distribution center of the double-sided cylindrical array convex lenses obtained by batch preparation from an original zero point to one side of the original zero point.
3. The method of manufacturing a double-sided cylindrical array convex lens according to claim 1, wherein mass-preparing the upper lens plate and the lower lens plate based on the preset decentration amount, comprises: designing an upper die core die and a lower die core die based on the preset eccentric amount; placing the optical glass preform into a cavity of the lower die core die, and performing compression molding at a set first temperature and a first pressure curve to obtain a lower lens plate; and placing the optical glass preform into a cavity of the upper die core die, and performing compression molding at a set second temperature and a second pressure curve to obtain an upper lens plate.
4. The method of manufacturing a double-sided cylindrical array convex lens according to claim 3, wherein designing the upper and lower insert molds based on the preset eccentricity amount comprises: coinciding a cylindrical surface array cavity positioning reference positioned on a lower die core with the center of the die to determine a lower die core die; and the center of the cylindrical surface array cavity positioned on the upper die core is overlapped with the center of the die, and then the preset eccentric amount is actively shifted in the preset direction to determine the upper die core die.
5. The method of manufacturing a double-sided cylindrical array convex lens according to claim 1, wherein sequentially joining and bonding the upper lens plate and the lower lens plate to prepare the double-sided cylindrical array convex lens in batch, comprising: coarsely positioning the upper lens plate and the lower lens plate in a preset direction through a positioning clamp; Performing secondary adjustment on the upper lens plate and the lower lens plate after coarse positioning by utilizing an optical projection or infrared alignment system so as to realize involution; And bonding the upper lens plate and the lower lens plate after involution to prepare the double-sided cylindrical surface array convex lens.
6. The method of manufacturing a double-sided cylindrical array convex lens according to claim 5, wherein the bonding process is an optical gluing or direct thermal bonding process.
7. The method of manufacturing a double sided cylindrical array convex lens according to claim 1, further comprising: detecting the double-sided cylindrical array convex lenses obtained in batch preparation to measure the actual total eccentric amount of each double-sided cylindrical array convex lens, thereby obtaining a new normal distribution; and based on the new normal distribution, performing qualification judgment on all the double-sided cylindrical array convex lenses obtained by batch preparation.
8. The method of claim 7, wherein the detection of the double sided cylindrical array lens is performed using an optical image measuring instrument or an alignment detection system.

Description

Manufacturing method of double-sided cylindrical surface array convex lens Technical Field The application relates to the technical field of manufacturing of precision optical elements, in particular to a manufacturing method of a double-sided cylindrical surface array convex lens. Background In the field of optical element manufacturing, a double-sided cylindrical array convex lens (i.e., cylindrical convex lens arrays are processed on both side surfaces of a lens) is an important optical element, and is widely applied to beam shaping, homogenization, 3D sensing and imaging systems. In the prior art, an assembling method of firstly processing and then aligning is adopted, which comprises the following steps of respectively manufacturing or processing an upper lens plate and a lower lens plate with cylindrical arrays, precisely aligning central axes (or specific optical references) of the upper lens plate and the lower lens plate through a high-precision mechanical clamp, a visual alignment system or a micro-operation platform in the assembling process, aiming at realizing ideal concentric or coaxial states, and finally combining the aligned upper lens plate and the aligned lower lens plate into a complete double-sided cylindrical array lens through gluing, welding or mechanical fixing and the like. However, the assembly method has extremely high requirement on assembly precision and high cost. In order to achieve optical performance, it is required that the centers of the upper and lower lens arrays are aligned exactly, and any small translational misalignment will cause serious optical aberrations such as astigmatism and flare distortion. This requires the reliance on extremely precise tooling and complex alignment processes, adding significant manufacturing costs and time. Meanwhile, the yield is subject to random errors, which are difficult to control, and various random errors, such as mechanical vibration, micro deformation of a jig, shrinkage stress of glue, fine difference of operators, etc., are inevitably present in the assembly process. These random errors result in random distribution of the centering state of the final product, so that the yield (i.e., the proportion of the product which completely meets the centering tolerance) fluctuates greatly and is generally low, and generally only a bit percentage can be reached, the product quality is unstable, and the economy of mass production is poor. Moreover, the quality consistency is poor, and since the alignment accuracy depends on the 'instantaneous state' of each assembly, even products produced in the same batch have large differences in optical performance, and it is difficult to ensure the consistency and reliability of the products. Disclosure of Invention The application aims to provide a manufacturing method of a double-sided cylindrical array convex lens, which converts random errors which cannot be eliminated into controllable systematic errors, so that the effective yield is greatly improved. In order to achieve the above object, the present application provides the following solutions: the application provides a manufacturing method of a double-sided cylindrical surface array convex lens, which comprises the following steps: calculating an assembly standard deviation based on historical production data of the convex lenses of the double-sided cylindrical arrays; Based on a normal distribution model, calculating a preset eccentric amount according to a preset qualified tolerance zone and the assembly standard deviation; preparing an upper lens plate and a lower lens plate in batches based on the preset eccentric amount; And sequentially carrying out involution and bonding on the upper lens plate and the lower lens plate to prepare the double-sided cylindrical surface array convex lenses in batches. According to the specific embodiment provided by the application, the application has the following technical effects that the application acknowledges and utilizes the errors, calculates the assembly standard deviation based on the historical production data of the convex lenses of the double-sided cylindrical array, further determines the preset eccentric amount, and corrects the average value of uncontrollable random errors by introducing the controllable preset eccentric amount so as to lead the error distribution center of the final product to be aligned with the quality target. On the premise of not remarkably increasing the equipment cost and the process complexity, the improvement of the order of the finished product rate and the deterministic control of the product quality are realized. Drawings In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings