Design method of large-aperture biconvex aspheric mirror processing die

Abstract

The invention discloses a design method of a large-aperture biconvex aspheric mirror processing die, which comprises the following steps: determining the shape of the die according to the shape of a lens, designing the size of the die according to the aperture size of the lens, manually measuring the selected lens by using a tool, and recording the data of the manual measurement. The method comprises the following steps of: modeling on a computer according to three numerical values of the aperture size, the K value and the R value of the lens, simulating a curved surface of a required mold, forming a hole in the mold, fixing the lens at the central position of the mold by using a screw and a gasket, detecting after fixing the lens in the mold, and judging whether the center of the lens and the center of the mold are concentric or not; according to the method, high-precision measurement is adopted for modeling and mold opening of the mold, the biconvex aspheric mirror machining mold adopts the design of a square lens mounting groove, two curvatures of a biconvex mirror surface are designed on the same mold, the effect of saving time is achieved, meanwhile, holes are formed in the mold, a mirror body is fixed through gaskets and screws, and the purposes of high safety and low cost are achieved. And the fixation is easy.

Description

Technical Field

[0001] The invention relates to the technical field of large-aperture biconvex aspheric mirror processing mold design, and in particular to a large-aperture biconvex aspheric mirror processing mold design method. Background Art

[0002] With the continuous development of society and the optical industry, aspheric lenses are used in more and more places in life. Aspheric lenses are widely used in light collection, projection, lighting, detection and focusing, especially in the military, civil and aerospace fields. Aspheric lenses are different from traditional spherical lenses. At least one of their surfaces is not spherical. This design can reduce spherical aberration and improve the performance of the optical system. In the specific processing technology, the processing of aspheric lenses is usually divided into four main parts: blank production, grinding and forming, polishing and inspection of each process. In the grinding and forming stage, the spherical blank needs to be processed according to the design requirements, and the appropriate tooling mold is selected.

[0003] Aspheric mirror processing is different from spherical mirror processing. Aspheric mirror processing requires the use of specific molds for processing, and most aspheric mirrors have different diameters, so the molds cannot be manufactured according to standard parts. They need to be designed and manufactured separately for large-diameter aspheric mirrors. The grinding and molding process of aspheric mirrors requires surface grinding by milling machines. Generally speaking, the difficulty of processing increases with the diameter of the lens. When a large-diameter biconvex aspheric mirror is processed on the second surface on a milling machine, it is difficult to fix it, and the processed first surface will be damaged. Therefore, an improved technology is urgently needed to solve this problem in the existing technology. Summary of the invention

[0004] The purpose of the present invention is to provide a method for modeling and opening a mold using high-precision measurement. The double convex aspheric mirror processing mold adopts a square lens mounting groove design, which is suitable for the processing and fixation of square lenses. At the same time, it can also fix circular lenses well, realizing multiple uses of one mold. Moreover, the two curvatures of the double convex mirror surface are designed on the same mold, which saves time. At the same time, holes are opened on the mold, and the mirror body is fixed with gaskets and screws. A design method for a large-diameter double convex aspheric mirror processing mold with high safety is provided to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a design method for a large-aperture biconvex aspheric mirror processing mold, the design method for a large-aperture biconvex aspheric mirror processing mold is:

[0006] S1. Determine the mold shape according to the shape of the lens, and determine the size of the mold to be designed according to the diameter of the lens;

[0007] S2. Manually measure the selected lens using a tool and record the manually measured data;

[0008] S3, modeling is performed on the computer through the three values ​​of lens aperture size, K value size, and R value size to simulate the curved surface of the required mold;

[0009] S4, make a hole in the mold, and fix the lens in the center of the mold using screws and gaskets;

[0010] S5. After the lens is fixed inside the mold, it is inspected to determine whether the center of the lens is concentric with the center of the mold.

[0011] Preferably, in S1, a biconvex aspheric mirror to be processed is selected, and the aperture size of the selected biconvex aspheric mirror is measured by laser, the aperture size of the lens is measured multiple times, and the value of each measurement is recorded.

[0012] Determine the K value and R value of the biconvex aspheric mirror;

[0013] Compare the measured lens aperture size, K value, and R value. If the values ​​measured multiple times are the same, determine the value. If the values ​​measured multiple times are different, calculate the average value of the multiple measurements of the biconvex aspheric mirror.

[0014] Preferably, the lens aperture size, K value, and R value measured in S1 are modeled, and a mold formed after the modeling is completed is output;

[0015] A 3D printer is used to print out the established mold according to the output mold, and a scanner is used to perform three-dimensional scanning on the surface of the printed double convex aspheric mirror processing mold. The lens aperture size, K value, and R value of the large-aperture double convex aspheric mirror scanned by the scanner are compared with the various values ​​obtained by the initial measurement.

[0016] Preferably, in S2, a caliper or a tape measure is used to perform multiple measurements, each measurement has a different angle and direction, and the measured data is analyzed.

[0017] Preferably, the two curvatures of the biconvex mirror surface in S2 are designed on the same mold.

[0018] Preferably, in said S3, the mold blank with good preparation is fully scanned, and the positions where holes need to be opened are determined on the prepared biconvex aspheric mirror mold in combination with the test data of the selected biconvex aspheric mirror;

[0019] Drill holes according to the determined hole positions, the drilled holes are threaded holes, and the drilled holes are polished.

[0020] Preferably, after the biconvex aspheric mirror is fixed, a test is performed to detect whether the center of the biconvex aspheric mirror and the center of the mold are at the same center position.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) Determine the K value and R value of the biconvex aspheric mirror, compare the measured lens aperture, K value, and R value, and if the values ​​measured multiple times are the same, determine the value; if the values ​​measured multiple times are different, average the values ​​measured multiple times of the biconvex aspheric mirror to ensure the accuracy of the test data;

[0023] (2) The printed biconvex aspheric mirror processing mold surface is scanned three-dimensionally by a scanner, and the lens diameter size, K value size, and R value of the large-aperture biconvex aspheric mirror scanned by the scanner are compared with the various values ​​measured at the beginning, and the cast mold data is in turn compared with the various setting parameters of the biconvex aspheric mirror measured originally to verify the accuracy of the set mold;

[0024] (3) The invention adopts high-precision measurement to model and open the mold. The double convex aspheric mirror processing mold adopts a square lens mounting groove design, which is not only suitable for the processing and fixation of square lenses, but also can well fix round lenses, realizing multiple uses of one mold. Moreover, the two curvatures of the double convex mirror surface are designed on the same mold, which saves time. At the same time, holes are opened on the mold, and the mirror body is fixed with gaskets and screws, achieving the effect of high safety and easy fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The diagram shows the design method flow chart of the large-aperture biconvex aspheric mirror processing mold of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1 The present invention provides a technical solution: a design method for a large-aperture biconvex aspheric mirror processing mold, the design method for a large-aperture biconvex aspheric mirror processing mold is:

[0028] S1. Determine the mold shape according to the shape of the lens, and determine the size of the mold to be designed according to the diameter of the lens;

[0029] S2. Manually measure the selected lens using a tool and record the manually measured data;

[0030] S3, modeling is performed on the computer through the three values ​​of lens aperture size, K value size, and R value size to simulate the curved surface of the required mold;

[0031] S4, make a hole in the mold, and fix the lens in the center of the mold using screws and gaskets;

[0032] S5. After the lens is fixed inside the mold, it is inspected to determine whether the center of the lens is concentric with the center of the mold.

[0033] Select the biconvex aspheric mirror to be processed, measure the aperture size of the selected biconvex aspheric mirror by laser, measure the aperture size of the lens multiple times and record the value of each measurement, use tools to manually measure the selected lens and record the manual measurement data, use calipers or tape measures to measure multiple times, each measurement has a different angle and direction, and analyze the measured data.

[0034] Determine the K value and R value of the biconvex aspheric mirror, compare the measured lens aperture, K value, and R value. If the values ​​measured multiple times are the same, determine the value. If the values ​​measured multiple times are different, calculate the average value of the multiple measurements of the biconvex aspheric mirror to ensure the accuracy of the test data.

[0035] The measured lens aperture size, K value, and R value are used for modeling, and the mold formed after modeling is output. The two curvatures of the double convex mirror are designed on the same mold. The established mold is printed out by a 3D printer according to the output mold. The surface of the printed double convex aspheric mirror processing mold is scanned in three dimensions by a scanner. The lens aperture size, K value, and R value of the large-aperture double convex aspheric mirror obtained by the scanner are compared with the various values ​​measured at the beginning. The cast mold data is in turn compared with the various setting parameters of the double convex aspheric mirror measured originally to verify the accuracy of the set mold.

[0036] Embodiment 1,

[0037] Select a biconvex aspheric mirror to be processed, measure the lens aperture of the selected biconvex aspheric mirror by laser, measure the lens aperture multiple times, and record the value of each measurement, determine the K value and R value of the biconvex aspheric mirror, compare the measured lens aperture, K value, and R value, if the values ​​measured multiple times are the same, determine the value, if the values ​​measured multiple times are different, calculate the average of the multiple measured values ​​of the biconvex aspheric mirror.

[0038] The measured lens aperture size, K value, and R value are imported into the modeling system for circular mold modeling, and the circular mold formed after modeling is output. The mold blank is formed by injection molding according to the output mold, and the injection molded blank is polished and deburred.

[0039] The double convex aspheric mirror processing mold that has been polished after injection molding is scanned in three dimensions using a scanner. The lens aperture size, K value, and R value of the large-aperture double convex aspheric mirror obtained by the scanner are compared with the various values ​​of the double convex aspheric mirror measured at the beginning to determine whether they meet the selected double convex aspheric mirror mold standard.

[0040] Embodiment 2,

[0041] Select a biconvex aspheric mirror to be processed, measure the lens aperture of the selected biconvex aspheric mirror by laser, measure the lens aperture multiple times, and record the value of each measurement, determine the K value and R value of the biconvex aspheric mirror, compare the measured lens aperture, K value, and R value, if the values ​​measured multiple times are the same, determine the value, if the values ​​measured multiple times are different, calculate the average of the multiple measured values ​​of the biconvex aspheric mirror.

[0042] The measured lens aperture size, K value, and R value are imported into the modeling system for square mold modeling. The mold formed after the square mold is completed is output. A square blank mold is formed by casting according to the output mold model, and the cast blank is polished and deburred.

[0043] The double convex aspheric mirror processing mold that is polished after casting is scanned in three dimensions using a scanner. The lens aperture size, K value, and R value of the large-aperture double convex aspheric mirror obtained by the scanner are compared with the various values ​​of the double convex aspheric mirror measured at the beginning to determine whether it meets the selected double convex aspheric mirror mold standard.

[0044] The prepared mold blank is fully scanned, and combined with the inspection data of the selected double convex aspheric mirror, the position where the hole needs to be opened is determined on the prepared double convex aspheric mirror mold, and the hole is opened according to the determined hole position. The opened hole is a threaded hole, and the opened hole is polished. After the double convex aspheric mirror is fixed, it is tested to detect whether the center of the double convex aspheric mirror and the center of the mold are in the same center position. When the center of the double convex aspheric mirror and the center of the mold are in the same center position, the fixation of the double convex aspheric mirror is completed, and it is also verified that the accuracy of the prepared mold meets the requirements.

[0045] The shape of the mold needs to be designed according to the shape of the lens. The mold for round lenses is usually designed to be round, and the mold for directional lenses has two design options: square and round. The size of the mold needs to be designed according to the diameter of the lens. It needs to be expanded and widened based on the diameter of the lens to facilitate the removal and fixation of the lens.

[0046] The two shapes of the completed molds are compared. Since the lenses are divided into round lenses and square lenses, and the mounting grooves inside the molds are square or round, it is found in actual applications that when the lens mounting grooves inside the double convex aspheric mirror processing mold are square mounting grooves, it can be suitable for fixing square lenses and round lenses, while when the mounting grooves inside the double convex aspheric mirror processing mold are round, it is not stable enough for fixing square lenses. Therefore, after comprehensive consideration, the lens mounting grooves inside the double convex aspheric mirror processing mold are set to square mounting grooves.

[0047] In the invention, high-precision measurement is used for mold modeling and mold opening. The double convex aspheric mirror processing mold adopts a square lens mounting groove design, which is not only suitable for the processing and fixation of square lenses, but also can fix round lenses well, realizing multiple uses of one mold. Moreover, the two curvatures of the double convex mirror surface are designed on the same mold, which saves time. At the same time, holes are opened on the mold, and the mirror body is fixed with gaskets and screws, achieving the effects of high safety and easy fixation.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A design method for a large-aperture biconvex aspheric mirror processing mold, characterized in that: The design method of the large-aperture biconvex aspheric mirror processing mold is as follows: S1. Determine the mold shape according to the shape of the lens, and determine the size of the mold to be designed according to the diameter of the lens; S2. Manually measure the selected lens using a tool and record the manually measured data; S3, modeling is performed on the computer through the three values ​​of lens aperture size, K value size, and R value size to simulate the curved surface of the required mold; S4, make a hole in the mold, and fix the lens in the center of the mold using screws and gaskets; S5. After the lens is fixed inside the mold, it is inspected to determine whether the center of the lens is concentric with the center of the mold.

2. The design method of a large-aperture biconvex aspheric mirror processing mold according to claim 1, characterized in that: In the step S1, a biconvex aspheric mirror to be processed is selected, and the aperture size of the selected biconvex aspheric mirror is measured by laser. The aperture size of the lens is measured multiple times, and the value of each measurement is recorded. Determine the K value and R value of the biconvex aspheric mirror; Compare the measured lens aperture size, K value, and R value. If the values ​​measured multiple times are the same, determine the value. If the values ​​measured multiple times are different, calculate the average value of the multiple measurements of the biconvex aspheric mirror.

3. The design method of a large-aperture biconvex aspheric mirror processing mold according to claim 1, characterized in that: Modeling the lens aperture size, K value, and R value measured in S1, and outputting the mold formed after the modeling is completed; A 3D printer is used to print out the established mold according to the output mold, and a scanner is used to perform three-dimensional scanning on the surface of the printed double convex aspheric mirror processing mold. The lens aperture size, K value, and R value of the large-aperture double convex aspheric mirror scanned by the scanner are compared with the various values ​​obtained by the initial measurement.

4. The method for designing a large-aperture biconvex aspheric mirror processing mold according to claim 1, characterized in that: In S2, a caliper or a tape measure is used to perform multiple measurements, each measurement has a different angle and direction, and the measured data is analyzed.

5. The method for designing a large-aperture biconvex aspheric mirror processing mold according to claim 1, characterized in that: The two curvatures of the double convex mirror surface in S3 are designed on the same mold.

6. The method for designing a large-aperture biconvex aspheric mirror processing mold according to claim 1, characterized in that: In the step S4, the mold blank with good reviews is fully scanned, and the positions where holes need to be opened are determined on the prepared mold of the biconvex aspheric mirror in combination with the detection data of the selected biconvex aspheric mirror; Drill holes according to the determined hole positions, the drilled holes are threaded holes, and the drilled holes are polished.

7. The method for designing a large-aperture biconvex aspheric mirror processing mold according to claim 1, characterized in that: After the biconvex aspheric mirror is fixed in S5, a test is performed to detect whether the center of the biconvex aspheric mirror and the center of the mold are at the same center position.

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