CN107053664A - The preparation method of camera lens - Google Patents

Abstract

The embodiment of the present invention discloses a method for preparing a lens, which includes: obtaining a three-dimensional design drawing of the lens; printing out a processing tool head matching the shape of the lens according to the three-dimensional design drawing using 3D printing technology; Use the processing cutter head on the CNC machine tool to process the lens blank to obtain a lens sample; perform technical appraisal on the lens sample, and if the lens sample meets the technical appraisal standard, then perform a technical appraisal on the lens sample Mass-produced to obtain multiples of said lenses. The preparation method of the lens disclosed in the embodiment of the present invention solves the technical problems of the Lens trial production process currently on the market, which has a high trial production failure rate and low trial production efficiency.

Description

Lens Preparation Method

technical field

The invention belongs to the field of manufacturing methods, in particular to a method for preparing a lens.

Background technique

At present, the mainstream technology of VR lens, mobile phone CCM Lens, and other Lens on the market is as follows: first, process the injection mold of Lens on the computer numerical control machine tool; then, use the injection mold to inject trial production of Lens; Lens is measured and tested, and if the standard is met, the Lens will be mass-produced.

However, Lens generally requires high manufacturing precision, and the current trial process requires a long and repeated mold repair process. This is because, on the one hand, machine tools, cutter heads, and labor in the process of processing injection molds may affect the quality of injection molds. Specifications; on the other hand, the temperature, pressure, mold assembly, etc. in the injection molding trial production process may affect the accuracy of the trial production product, which results in a high failure rate in the trial production of Lens. In addition, when Lens measurement and testing do not meet the standards, it is often difficult to determine whether it is caused by mold size problems or injection molding process problems. Repeated tests and verifications are required, resulting in a long time-consuming and waste of manpower, which makes the trial production efficiency of Lens lower.

In short, the Lens trial production process currently on the market has the technical problems of high trial production failure rate and low trial production efficiency.

Contents of the invention

In view of this, an embodiment of the present invention provides a method for manufacturing a lens, which is used to solve the technical problems that the Lens trial production process currently on the market has a very high trial production failure rate and low trial production efficiency.

The embodiment of the present invention provides a method for preparing a lens, which includes:

Obtaining a three-dimensional design drawing of the lens;

Using 3D printing technology to print out the processing cutter head matching the shape of the lens according to the three-dimensional design drawing;

Using the processing cutter head on a numerical control machine tool to process a lens blank to obtain a lens sample;

Perform technical appraisal on the lens sample, and if the lens sample meets the technical appraisal standard, mass-produce the lens sample to obtain a plurality of the lenses.

Further, carry out technical appraisal on the lens sample, if the lens sample does not meet the technical appraisal standard, adjust the processing parameters of the CNC machine tool and use the processing head to process the next lens blank, Until the lens samples that meet the technical appraisal standards are obtained.

Further, if the printing material for printing the processed cutter head is a photosensitive resin, the preparation method of the lens further includes:

Electroforming is performed on the machining tool head.

Further, the precision error of the machining tool head is less than 1 micron.

Further, the 3D printing technology is micro-nano 3D printing technology.

Further, the micro-nano 3D printing technology includes digital light processing projection technology or stereolithography technology or two-photon absorption laser point-by-point scanning technology.

Further, the method for technical appraisal of the lens sample further includes:

Physical dimension measurement and performance testing are performed on the lens sample.

The preparation method of the lens provided by the embodiment of the present invention uses 3D printing technology to print out the precise processing tool head, processes the lens blank on the CNC machine tool, and then conducts technical appraisal on the lens sample, so as to improve the accuracy of trial production and simplify the trial production. production steps, avoiding the unguaranteed product qualification rate due to the repeated use of CNC machine tools and manual labor in the preparation process, and can respond quickly when the product is unqualified, improve the trial production efficiency, and solve the problem of the current Lens trial production process on the market. The unqualified rate of trial production is extremely high and the trial production efficiency is low.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a method flow chart of the preparation method of the lens provided by the embodiment of the present invention;

Fig. 2 is another method flow chart of the preparation method of the lens provided by the embodiment of the present invention;

Fig. 3 is another method flow chart of the lens preparation method provided by the embodiment of the present invention;

FIG. 4 is another flow chart of the lens manufacturing method provided by the embodiment of the present invention.

detailed description

The implementation of the present invention will be described in detail below with reference to the drawings and examples, so as to fully understand and implement the implementation process of how to use technical means to solve technical problems and achieve technical effects in the present invention.

Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. In addition, the term "coupled" or "electrically connected" herein includes any direct and indirect electrical coupling means. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically coupled to the second device, or indirectly electrically coupled through other devices or coupling means. connected to the second device. The following descriptions in the specification are preferred implementation modes for implementing the present invention, but the descriptions are for the purpose of illustrating the general principle of the present invention, and are not intended to limit the scope of the present invention. The scope of protection of the present invention should be defined by the appended claims.

It should also be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, commodity, or system comprising a set of elements includes not only those elements, but also includes Other elements not expressly listed, or elements inherent in such process, method, commodity, or system are also included. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, commodity or system comprising said element.

specific embodiment

Please refer to FIG. 1 , which is a flow chart of a method for preparing a lens provided in an embodiment of the present invention. The method for preparing a lens includes:

Step S100, obtaining a three-dimensional design drawing of the lens;

Step S300, using 3D printing technology to print out a processing cutter head matching the shape of the lens according to the three-dimensional design drawing;

Step S500, using the processing cutter head on the CNC machine tool to process the lens blank to obtain a lens sample;

Step S700, perform technical appraisal on the lens sample, and if the lens sample meets the technical appraisal standard, perform mass production on the lens sample to obtain a plurality of the lenses.

Here, it should be pointed out that the lens is a plastic product with a relatively high precision requirement. Since the embodiment of the present invention is applicable to the lens with a relatively high precision requirement, it is also applicable to a plastic product with a relatively general precision requirement. The lens is generally made of plastic, that is, a plastic lens, and the plastic lens here includes a resin lens, which can be widely used in VR, mobile phone CCM, and other optical lenses.

In step S100, the three-dimensional design diagram of the lens is to be obtained, and the method for obtaining the three-dimensional design diagram here includes, but is not limited to, a computer-based drawing method.

In step S300, following the above step S100, after obtaining the three-dimensional design drawing, use 3D printing technology to print out a machining tool head matching the shape of the lens. Here, since the shapes of the processing tool head and the lens match each other, the three-dimensional design drawing of the lens is used as the design drawing for making the processing tool head, and the three-dimensional design of the lens is obtained in step S100 picture.

The processing cutter head is a cutter head that matches the shape of the lens. This matching relationship is illustrated as an example. The lens is a lens of a mobile phone camera with a sawtooth shape, so the processing cutter head is the same as the sawtooth. The shape of the lens matches the shape of the cutter head. This matching relationship is a relationship between Yin and Yang. For example, if there is a convex part on the lens, there will be a matching concave part at the corresponding position of the cutter head.

Specifically, the 3D printing technology is a micro-nano 3D printing technology, that is, micro stereolithography, which refers to a new type of microfabrication developed on the basis of the traditional 3D printing process - Stereo Lithography (SL). Technology, the layer thickness used in micro stereolithography is usually 0.5-10um.

In addition, the micro-nano 3D printing technology includes, but is not limited to, digital light processing projection technology, or stereolithography molding technology, or two-photon absorption laser point-by-point scanning technology.

The digital light processing projection technology, that is, DLP (Digital Light Processing), this technology first digitally processes the image signal, and then projects the light. It is based on the digital micromirror component developed by TI (Texas Instruments) - DMD (Digital Micromirror Device) to complete the technology of visual digital information display. Specifically, the DLP projection technology uses a digital micromirror chip (DMD) as a main key processing element to realize a digital optical processing process.

The stereolithography technology, that is, SLA (Stereo lithography Apparatus), uses a laser with a specific wavelength and intensity to focus on the surface of the photo-curable material, so that it is sequentially solidified from point to line and from line to surface to complete a layer of drawing. operation, and then the lifting platform moves the height of one layer in the vertical direction, and then solidifies another layer, so that the layers are superimposed to form a three-dimensional entity.

The two-photon absorption laser point-by-point scanning technology utilizes the two-photon absorption phenomenon of femtosecond beams in the focal local area of the material, and realizes the processing technology of three-dimensional micro-device forming point by point.

It should be pointed out that the micro-nano 3D printing technologies listed above are only exemplary, and cannot represent all micro-nano 3D printing technologies, nor do they constitute limitations on the embodiments of the present invention and the present invention. These printing technologies can ensure that the accuracy error between the contour of the final solid-state processing tool head and the 3D design can be achieved within 1um, which meets the processing accuracy requirements of the lens (Lens) (<1um).

In the micro-nano 3D printing technology here, the printing materials used may include but are not limited to plastics or metal materials; the preferred plastics are photosensitive resins. Due to the properties of the printing material itself, it is conceivable that the hardness of the processing cutter head printed with plastic material is not as good as that of the processed cutter head printed with metal material.

Please refer to FIG. 2 , which is another method flow chart of the lens preparation method provided by the embodiment of the present invention. In step S300, if the printing material for printing the processed cutter head is photosensitive resin, the method for preparing the processed cutter head ,Also includes:

Step S400, performing electroforming on the machining tool head.

Specifically, if the printing material used when printing the processing head is photosensitive resin, due to the limited hardness of photosensitive resin, it cannot be used as a processing head to directly process the lens, so when printing out the processing After cutting the cutting head, it is necessary to electroform the cutting head. That is to say, the hardness of the processed cutter head printed by photosensitive resin 3D is relatively low, and it cannot be directly used as a tool function. Therefore, the micro-electroforming technology is used to realize the translation from the resin material processed cutter head to the metal material cutter head. The process belongs to the chemical electroforming process, which can guarantee nanometer precision.

Of course, if the printing material used when printing the processing cutter head is a metal material, since the metal material has a relatively high hardness, the hardness of the processed cutter head printed out is relatively high, so it is absolutely unnecessary to carry out the processing on the processing cutter head. For electroforming translation, step S500 is performed directly after step S300.

It should be pointed out that the precision of the processing cutter head produced by the above method is less than 1 micron, and the high-precision processing cutter head can ensure the processing accuracy of the lens and effectively guarantee the qualified rate of the product.

In step S500, after the above-mentioned step S300 or step S400 is carried out to prepare the processing cutter head, the lens blank is processed by using the processing cutter head on a numerical control machine tool to obtain a lens sample. Specifically, the processing cutter head is installed on the CNC machine tool, and then the lens blank material pre-processed into the lens is placed on the CNC machine tool, and the corresponding machine tool processing parameters are input, and the lens blank material is processed by using the processing cutter head. Processing to obtain the corresponding lens samples.

In step S700, after the above step S500 is carried out to obtain the lens sample, it is necessary to perform technical appraisal on the lens sample. If the lens sample meets the technical appraisal standard, the lens sample is mass-produced to obtain a plurality of the lenses. specifically. The lens sample conforms to the design size and design standard of the lens, that is, the lens sample is qualified. In this case, the lens sample is mass-produced to obtain a plurality of the lenses. The mass production here can be the method of repeating the above steps, or adopting other mass production methods.

Please refer to FIG. 3 , which is another method flow chart of the lens preparation method provided by the embodiment of the present invention. The lens preparation method provided by the embodiment of the present invention also includes:

Step S800, if the lens sample does not meet the technical appraisal standard, adjust the processing parameters of the CNC machine tool and use the processing head to process the next lens blank until a lens sample meeting the technical appraisal standard is obtained .

Specifically, if the lens sample does not meet the technical appraisal standard, the lens sample is regarded as an unqualified product and cannot be mass-produced accordingly. Since the above process of preparing the processing cutter head is very precise, that is, the accuracy of the processing cutter head can be guaranteed, so product failure can only occur in the process of processing the lens blank by the CNC machine tool.

In this case, it is necessary to adjust the processing parameters of the numerical control machine tool and use the processing cutter head to process the next lens blank until a lens sample meeting the technical appraisal standard is obtained. The processing parameters of the CNC machine tool here include one or more of the following parameters: the placement position of the processing cutter head, the placement angle of the processing cutter head, the placement position of the lens blank, the lens blank The flatness of the material, the control parameters of the CNC machine tool, etc., the processing parameters of the CNC machine tool are listed above, but not all the parameters in actual processing. After adjusting the processing parameters of the CNC machine tool, use the processing cutter head to process the next lens blank. The processing method is carried out according to the above method until the lens sample that meets the technical appraisal standard is obtained, that is, after processing New lens samples also need to undergo technical appraisal, until the lens samples that meet the technical appraisal standards are obtained.

In addition, please refer to FIG. 4 , which is another method flow chart of the lens preparation method provided by the embodiment of the present invention. The method for technical appraisal of the lens sample in step S700 and step S800 further includes: Parts are measured for physical dimensions and performance tested.

That is, step S700 further includes:

Step S710, performing physical size measurement and performance test on the lens sample, and if the lens sample meets the technical appraisal standard, mass producing the lens sample to obtain multiple lenses;

Step S800 further includes:

Step S810, perform physical size measurement and performance test on the lens sample, if the lens sample does not meet the technical appraisal standard, adjust the processing parameters of the CNC machine tool and use the processing tool head to process the next lens The blank is processed until a lens sample that meets the technical appraisal standard is obtained.

Here, the specific method for performing technical appraisal on the lens sample includes: performing physical dimension measurement and performance testing on the lens sample. Specifically, after obtaining the lens sample, it is necessary to carry out technical appraisal on the lens sample according to the design dimensions and design standards of the lens. The scope of the technical appraisal includes but is not limited to the lens sample physical Measurement of dimensions and performance testing of the lens samples. The physical size of the lens sample refers to the external size, which can be carried out by means of some measuring tools, including but not limited to vernier calipers, rangefinders and the like. The performance test of the lens sample can be carried out through test experiments, such as imaging tests. By performing physical size measurement and performance testing on the lens sample, it can be known whether the lens sample meets the design size and design standards of the lens, that is, whether the lens sample is qualified; if it meets the lens The design dimensions and design standards of the lens are qualified products, and those that do not meet the design dimensions and design standards of the lens are unqualified products.

The preparation method of the lens provided by the embodiment of the present invention uses 3D printing technology to print out a precise processing tool head, processes the lens blank on a CNC machine tool, and then conducts technical appraisal on the lens sample, which improves the accuracy of trial production and simplifies It has simplified the trial production steps, avoided the unguaranteed product qualification rate due to the repeated use of CNC machine tools and manual labor in the preparation process, and can respond quickly when the product is unqualified, improving the trial production efficiency and solving the current Lens trial on the market. The production process has the technical problems of high trial production failure rate and low trial production efficiency.

Through the above description of the implementations, those skilled in the art can clearly understand that each implementation can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic discs, optical discs, etc., including several instructions to make a computer device (which may be a personal computer, server, or network device, etc.) execute the methods described in various embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (7)

1. a kind of preparation method of camera lens, it is characterised in that including:

Obtain the three dimensional design figure of the camera lens；

The processing cutter head matched with the lens shape is printed using 3D printing technique according to the three dimensional design figure；

Camera lens blank material is processed using the processing cutter head on Digit Control Machine Tool, camera lens exemplar is obtained；

Technical appraisement is carried out to the camera lens exemplar, if the camera lens exemplar meets technical appraisement standard, to the camera lens sample Part is produced in batches to obtain multiple camera lenses.

2. the preparation method of camera lens according to claim 1, it is characterised in that technology mirror is carried out to the camera lens exemplar It is fixed, if the camera lens exemplar does not meet technical appraisement standard, adjust the machined parameters of the Digit Control Machine Tool and added using described Work cutter head is processed to next camera lens blank material, until obtaining meeting the camera lens exemplar of technical appraisement standard.

3. the preparation method of camera lens according to claim 1, it is characterised in that if the printing material of the printing processing cutter head Expect for photosensitive resin, the preparation method of the camera lens, in addition to：

Electroforming processing is carried out to the processing cutter head.

4. the preparation method of the camera lens according to claim any one of 1-3, it is characterised in that the precision of the processing cutter head Error is less than 1 micron.

5. the preparation method of the camera lens according to claim any one of 1-3, it is characterised in that the 3D printing technique is micro- Receive 3D printing technique.

6. the preparation method of camera lens according to claim 5, it is characterised in that the micro-nano 3D printing technique includes numeral Light handles shadow casting technique or stereolithography apparatus technology or two-photon absorption laser point by point scanning technology.

7. the preparation method of the camera lens according to claim any one of 1-3, it is characterised in that described to the camera lens exemplar The method for carrying out technical appraisement, further comprises：

Physical size measurement and performance test are carried out to the camera lens exemplar.