CN111070742A - Lens module, manufacturing method thereof and camera - Google Patents
Lens module, manufacturing method thereof and camera Download PDFInfo
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- CN111070742A CN111070742A CN201911330282.0A CN201911330282A CN111070742A CN 111070742 A CN111070742 A CN 111070742A CN 201911330282 A CN201911330282 A CN 201911330282A CN 111070742 A CN111070742 A CN 111070742A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
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Abstract
The invention provides a preparation method of a lens module, which comprises the following steps of S1: providing a bottom die, and forming a lens material layer on the bottom die; step S2: providing a top die, aligning and pressing the top die and the bottom die, and solidifying the lens material layer to form a plurality of lenses, wherein each lens comprises a curved surface area and a plane area surrounding the curved surface area; step S3: forming a lens material layer on a lens; step S4: performing the step S2 again or repeating the steps S2 and S3 at least once until the lens module is formed; after the step S2 is performed for the first time and/or after the step S2 is repeatedly performed, a first annular light-shielding member is formed on each lens, the first annular light-shielding member being located in the planar area and extending the covering portion curved area. The first annular shading part is embedded between the adjacent lenses, so that the reflected stray light can be better shielded, and the phenomena of glare or ghost images are avoided. In addition, the invention also provides a lens module comprising the first annular light shading part and a camera.
Description
Technical Field
The invention relates to the technical field of cameras, in particular to a lens module, a manufacturing method of the lens module and a camera.
Background
Wafer Level Optics (WLO) refers to optical elements manufactured using Wafer Level lens manufacturing techniques and processes. Different from the traditional processing technology of optical elements, the WLO process is used for copying and processing lens modules in batches on a whole wafer by using a semiconductor process, pressing a plurality of lens wafers together and then cutting the lens wafers into single lens modules. The WLO process is more suitable for mobile-end consumer electronics, particularly under the condition that a 3D visual transmitting end structure is complex, the wafer-level optical element can effectively reduce the volume space, meanwhile, the consistency of devices is good, the weight is light, the height is low, the light beam quality is high, and the semiconductor process has the cost advantage after large-scale mass production.
Fig. 1 shows a schematic structural diagram of a lens module manufactured by using a WLO process. As shown in fig. 1, the lens module includes a lens assembly 100, the lens assembly 100 includes a first lens element 110 and a second lens element 120, and a lower surface of the first lens element 110 and an upper surface of the second lens element 120 are pressed together. The lens assembly 100 is fixed to a sensor module 200. When the incident light L1 is incident into the optical lens assembly 100 from the upper surface of the first lens element 110, at certain incident angles, the reflected light from the surface of the first lens element 110 and/or the second lens element 120 will be reflected multiple times inside the optical lens assembly 100 and enter the sensor module 200, and the stray light generated by the reflection will cause a glare (flare) or ghost (ghost) phenomenon as shown in fig. 2, resulting in a reduced image quality.
Disclosure of Invention
The invention aims to provide a lens module, a manufacturing method thereof and a camera, which can avoid the phenomenon of glare or ghost image caused by reflected stray light on each lens and improve the image quality.
In order to achieve the above object, the present invention provides a method for manufacturing a lens module, the method comprising:
step S1: providing a bottom die, and forming a lens material layer on the bottom die;
step S2: providing a top die, aligning and pressing the top die and the bottom die, solidifying the lens material layer and removing the top die to form a plurality of lenses, wherein each lens comprises a curved surface area and a plane area surrounding the curved surface area;
step S3: forming a layer of the lens material on the lens;
step S4: performing the step S2 again to form the lens module, or repeating the steps S2 and S3 at least once until the lens module is formed;
wherein, after the step S2 is performed for the first time and/or after the step S2 is repeatedly performed, a first annular light-shielding member is formed on each lens, and the first annular light-shielding member is located in the planar area and extends to cover part of the curved area.
Optionally, in step S4, after the steps S2 and S3 are repeatedly performed, the method for manufacturing a lens module further includes:
step S2 is executed again to form the lens module.
Optionally, the step of forming a first annular light-shielding member on each of the lenses includes:
coating a black photoresist on the lens;
and exposing the black photoresist to form a patterned black photoresist, wherein the patterned black photoresist comprises a plurality of first annular shading pieces which are in one-to-one correspondence with the lenses.
Optionally, the material of the lens material layer is a thermosetting material, and the lens material layer is heated to be cured; or the lens material layer is made of a photosensitive material, the bottom die and the top die are made of light-transmitting materials, and the lens material layer is exposed to light to be cured.
Optionally, after the lens module is formed, the method for manufacturing a lens module further includes:
and cutting the lens module into a lens module comprising a single lens and/or a lens module comprising at least two lenses.
The invention also provides a lens module, which comprises:
a lens group comprising at least two lenses embossed together;
each first annular shading piece is located between two adjacent lenses and comprises a curved surface area and a planar area surrounding the curved surface area, and the first annular shading pieces are located in the planar area and extend to cover part of the curved surface area.
Optionally, a second annular light shielding member is further disposed on the lens surface at the end of the lens group, and the material of the second annular light shielding member includes a metal material or a plastic.
Optionally, the material of the first annular light shielding member includes a black photoresist.
Optionally, the lens module is a WLO lens module.
The invention also provides a camera which comprises a sensing module and the lens module, wherein the lens module is arranged on the photosensitive surface of the sensing module.
The preparation method of the lens module provided by the invention comprises the following steps: step S1: providing a bottom die, and forming a lens material layer on the bottom die; step S2: providing a top die, aligning and pressing the top die and the bottom die, and solidifying the lens material layer to form a plurality of lenses, wherein each lens comprises a curved surface area and a plane area surrounding the curved surface area; step S3: forming a layer of the lens material on the lens; step S4: performing the step S2 again to form the lens module, or repeating the steps S2 and S3 at least once until the lens module is formed; wherein, after the step S2 is performed for the first time and/or after the step S2 is repeatedly performed, a first annular light-shielding member is formed on each lens, and the first annular light-shielding member is located in the planar area and extends to cover part of the curved area. The first annular light shading part can be embedded between adjacent lenses, and reflected stray light is shaded by the first annular light shading part, so that the phenomenon of glare or ghost images is avoided, and the image quality is improved; according to the preparation method of the lens module, the first annular shading part for covering part of the curved surface area of the lens can be formed, so that the shading effect is improved, and reflected stray light is further blocked; since the edge of the curved surface area generally has astigmatism or distortion, the first annular light shielding member can cover the edge of the curved surface area, so that the edge of the curved surface area can be prevented from influencing the imaging quality; in addition, the invention also provides a lens module comprising the first annular light shading part and a camera.
Drawings
Fig. 1 is a schematic structural diagram of a lens module manufactured by a WLO process in the background art;
FIG. 2 is an image of the lens module shown in FIG. 1 showing glare or ghost;
fig. 3 and 4 are schematic structural views of two lens modules;
fig. 5 is a flowchart of a method for manufacturing a lens module according to an embodiment of the invention;
fig. 6 to 17 are schematic cross-sectional views along the thickness direction of a lens structure manufactured by the method for manufacturing a lens module according to an embodiment of the present invention;
wherein the reference numerals are:
100. 300, 500-lens group; 110. 310, 510-a first lens; 120. 320, 520-second lens; 200. 400, 600-sensing module; l1, L2, L3-incident light; 330-annular shade; 10-bottom die; 20. 21-top die; 51. 52-a layer of lens material; 53-black photoresist; 530-first annular shade.
Detailed Description
Fig. 3 and 4 are schematic structural diagrams of two lens modules. As shown in fig. 3 and 4, the lens module includes a lens assembly 300, the lens assembly 300 includes a first lens 310, a second lens 320 and a ring-shaped light-shielding member 330, a lower surface of the first lens 310 and an upper surface of the second lens 320 are pressed together, the ring-shaped light-shielding member 330 in the lens module in fig. 3 is located on the upper surface of the first lens 310, and the ring-shaped light-shielding member 330 in the lens module in fig. 4 is located on the lower surface of the second lens 320. The lens assembly 300 is fixed to a sensor module 400. As shown in fig. 3, when the incident light L2 is incident into the lens assembly 300 from the upper surface of the first lens 310, at certain incident angles (angles that would generate reflected stray light), since the annular light shielding member 330 is located on the upper surface of the first lens 310, it can directly shield this portion of the incident light L2 from entering into the lens assembly 300, so as to avoid glare or ghost light caused by the reflected stray light. As shown in fig. 4, when the incident light L2 is incident into the lens assembly 300 from the upper surface of the first lens element 310, at some incident angles (angles that may generate reflected stray light), the annular light shielding member 330 is located on the lower surface of the second lens element 320, so as to prevent the reflected stray light from entering the sensor module 400, thereby preventing the reflected stray light from causing glare or ghost.
It can be seen that the annular light-shielding member 330 is disposed on the upper surface and/or the lower surface of the lens assembly 300 to prevent the reflected stray light from causing glare or ghost images, thereby improving the image quality. However, when the ring-shaped light-shielding members 330 are disposed on the upper surface and/or the lower surface of the mirror group 300, the ring-shaped light-shielding members 330 are exposed, resulting in low stability and lifetime of the ring-shaped light-shielding members 330, thereby affecting the performance of the device.
Based on this, the invention provides a method for manufacturing a lens module, comprising: step S1: providing a bottom die, and forming a lens material layer on the bottom die; step S2: providing a top die, aligning and pressing the top die and the bottom die, and solidifying the lens material layer to form a plurality of lenses, wherein each lens comprises a curved surface area and a plane area surrounding the curved surface area; step S3: forming the lens material layer on the lens, and repeating the step S2 until a lens module is formed; after step S2 and/or after repeating step S2, a first annular light-blocking member is formed on each of the lenses, the first annular light-blocking member being located in the planar area and extending the curved area of the covering portion. The first annular light shading part can be embedded between adjacent lenses, and reflected stray light is shaded by the first annular light shading part, so that the phenomenon of glare or ghost images is avoided, and the image quality is improved; according to the preparation method of the lens module, the first annular shading part for covering part of the curved surface area of the lens can be formed, so that the shading effect is improved, and reflected stray light is further blocked; since the edge of the curved surface area generally has astigmatism or distortion, the first annular light shielding member can cover the edge of the curved surface area, so that the edge of the curved surface area can be prevented from influencing the imaging quality; in addition, the invention also provides a lens module comprising the first annular light shading part and a camera.
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Fig. 5 is a flowchart of a method for manufacturing a lens module according to an embodiment of the invention. As shown in fig. 5, the method for manufacturing the lens module includes:
step S1: providing a bottom die, and forming a lens material layer on the bottom die;
step S2: providing a top die, aligning and pressing the top die and the bottom die, solidifying the lens material layer and removing the top die to form a plurality of lenses, wherein each lens comprises a curved surface area and a plane area surrounding the curved surface area;
step S3: forming a layer of the lens material on the lens;
step S4: performing the step S2 again to form the lens module, or repeating the steps S2 and S3 at least once until the lens module is formed;
wherein, after the step S2 is performed for the first time and/or after the step S2 is repeatedly performed, a first annular light-shielding member is formed on each lens, and the first annular light-shielding member is located in the planar area and extends to cover part of the curved area.
Specifically, please refer to fig. 6 to 17, which are schematic cross-sectional views of a lens structure manufactured by the method for manufacturing a lens module according to the present embodiment, and the method for manufacturing a lens module according to the present embodiment will be further described with reference to fig. 6 to 17.
Referring to fig. 6, step S1 is first performed to provide a mold 10, wherein a plurality of recesses are formed on a surface of the mold 10 and are distributed at equal intervals, and a size of the recesses is related to a size of a lens to be formed. Next, as shown in fig. 7, a lens material layer 51 is formed on the surface of the bottom mold 10, and the lens material layer 51 fills the recess of the surface of the bottom mold 10 and extends to cover the surface of the bottom mold 10. In this embodiment, the lens material layer 51 is made of thermosetting adhesive, and the thermosetting adhesive is coated on the surface of the bottom mold 10 by a coating process to form the lens material layer 51, where the lens material layer 51 is in a gel shape with fluidity.
Referring to fig. 8, step S2 is first performed to provide a top mold 20, wherein the top mold 20 also has a plurality of recesses on its surface, and the recesses on the surface of the top mold 20 are matched with the recesses on the surface of the bottom mold 10 in size and position in the thickness direction. Next, as shown in fig. 9, the top mold 20 and the bottom mold 10 are aligned and pressed, and the lens material layer 51 is pressed into a fixed shape. The lens material layer 51 is then heated to be cured, and the cured lens material layer 51 includes a plurality of first lenses 510, and the plurality of first lenses 510 are completely connected together. Each of the first lenses 510 includes a curved surface region and a planar region surrounding the curved surface region, the curved surface region is formed by pressing and combining the concave surfaces of the top mold 20 and the bottom mold 10, and the planar region is formed by pressing and combining the surfaces of the top mold 20 and the bottom mold 10. Generally, the central area of the curved area serves as a light-transmitting area, while the edge area of the curved area has poor imaging quality due to astigmatism or distortion, and the planar area serves as a fixed area.
Referring to fig. 10, after the lens material layer 51 is cured, the top mold 20 and the lens material layer 51 are demolded.
Referring to fig. 11, a black photoresist 53 is coated on the lens material layer 51, and the black photoresist 53 is a material having a photosensitive effect and being opaque after being cured. As shown in fig. 11 and 12, the black photoresist 53 is exposed to form a patterned black photoresist, the patterned black photoresist includes a plurality of first annular light-shielding members 530 corresponding to the first lenses 510 one by one, and the first annular light-shielding members 530 are located in the planar area of the first lenses 510 and extend to cover a portion of the curved area. Of course, the area of the first annular light shielding member 530 covering the curved surface area can be adjusted according to actual needs. Since the first annular light-shielding member 530 is formed by using the exposure process, the process is simple and easy to operate, and the shape and size of the first annular light-shielding member 530 can be very precise; moreover, only the mask needs to be changed to form different first annular light-shielding members 530, so that the first annular light-shielding members 530 can adapt to different lens modules.
Of course, the material of the first annular light shielding member 530 is not limited to the black photoresist 53, and may be plastic or metal material; the process of forming the first annular light-shielding member 530 is not limited to the exposure process, and may be a coating process or a sputtering process.
Referring to fig. 13, a lens material layer 52 is formed on the first annular light-shielding member 530, and step S2 is repeated. That is, the material of the lens material layer 52 may be the same as the material of the lens material layer 51, and the lens material layer 52 may be formed on the first annular light-shielding member 530 using the same process as that for forming the lens material layer 51. Then, as shown in fig. 13, 14 and 15, another top mold 21 is provided, the top mold 21 and the bottom mold 10 are aligned and pressed, and then the lens material layer 52 is cured by the same process as that for curing the lens material layer 51. The cured lens material layer 52 includes a plurality of second lenses 520, and the plurality of second lenses 520 are now completely bonded together. As shown in fig. 14, in the embodiment, the surface of the top mold 21 has a plurality of protrusions, and the number, the size, and the position in the thickness direction of the protrusions respectively correspond to the number, the size, and the position in the thickness direction of the recesses on the bottom mold 10, so that after the alignment pressing, each of the second lenses 520 also includes a curved surface region and a planar region surrounding the curved surface region, the curved surface region is formed by pressing the protrusions of the top mold 21 and the recesses on the surface of the bottom mold 10, and the planar region is formed by pressing the surfaces of the top mold 21 and the bottom mold 10. As can be seen from fig. 15, the positions and numbers of the first lenses 510 and the second lenses 520 correspond, the positions of the curved surface areas of each set of the first lenses 510 and the second lenses 520 correspond, the positions of the flat surface areas correspond, and a first annular light shielding member 530 is provided between each set of the first lenses 510 and the second lenses 520, such that the first annular light shielding member 530 is embedded between the first lenses 510 and the second lenses 520, is located in the corresponding flat surface areas of the first lenses 510 and the second lenses 520, and extends to cover the curved surface areas of the first lenses 510 and the second lenses 520.
In this embodiment, the lens module only needs two lenses, and after the first lens 510 is formed, the first annular light shielding member 530 is directly formed on the first lens 510, so that the first annular light shielding member 530 is embedded between the two lenses. As an alternative embodiment, the lens module may further form a plurality of lenses, for example, 3, 4, or 5 lenses, which are stamped together, by repeatedly forming the lens material layer and stamping with the top mold, that is, a third lens, a fourth lens, or a fifth lens, etc. may also be stamped on the second lens 520. At this time, the first annular light shielding member 530 is not limited to be located only between the first lens 510 and the second lens 520, and may be located between the second lens 520 and the third lens, between the third lens and the fourth lens, or between the fourth lens and the fifth lens; or between each adjacent lens; or between partially adjacent lenses.
Referring to fig. 15 and 16, the top mold 21 and the bottom mold 10 are demolded and then cut to form a lens module of a single lens, specifically, as shown in fig. 17, the lens module includes a first lens 510, a second lens 520 and a first annular light shielding member 530, the first lens 510 and the second lens 520 are pressed together, the first annular light shielding member 530 is located between the first lens 510 and the second lens 520, and the first lens 510, the first annular light shielding member 530 and the second lens 520 form an optical assembly 500. Of course, the lens module may be cut into a lens module including at least two lenses, that is, the lens module may further include a plurality of lens groups 500, which is not limited in the present invention.
Further, in order to improve the light-shielding effect, before the top mold 21 is removed and/or before the lens material layer 51 is formed on the bottom film 10, a second annular light-shielding member (not shown) may be further formed, such that the second annular light-shielding member is located on the surface of the first lens 510 and/or the second lens 520, and the second annular light-shielding member may be located only in the plane area of the first lens 510 and/or the second lens 520, so as to avoid affecting the light incident amount of the lens module. The process of forming the second annular light-shielding member may also use an exposure process, or may also use simple printing, coating, sputtering, or the like, and the present invention is not limited thereto.
Optionally, before forming the lens material layer 51 on the surface of the bottom mold 10 or before aligning and pressing the top molds 20 and 21 and the bottom mold 10, a mold release adhesive may be further applied on the surfaces of the top molds 20 and 21 and the bottom mold 10, so as to facilitate mold release. It should be understood that fig. 6, 8 and 14 in the present embodiment only schematically illustrate one bottom mold and two top molds, but not limited thereto, and the shapes and sizes of the bottom mold 10 and the top molds 20 and 21 may be designed according to the shapes and sizes of lenses to be formed.
As an alternative embodiment, the material of the lens material layers 51 and 52 may also be a photosensitive material, the bottom mold and the top molds 20 and 21 need to be light-transmitting materials, and the lens material layers 51 and 52 may also be exposed and cured. For example, the material of the lens material layers 51 and 52 is photoresist, and when the material of the lens material layers 51 and 52 is cured, the lens material layers 51 and 52 may be cured by irradiating ultraviolet rays, and since both the bottom mold and the top molds 20 and 21 are transparent, the curing effect is not affected.
Based on this, as shown in fig. 17, the present embodiment further provides a lens module, including:
a lens group 500 comprising at least two lenses embossed together;
a plurality of first annular light-shielding members 530, each of the first annular light-shielding members 530 is located between two adjacent lenses, each of the lenses includes a curved surface area and a planar area surrounding the curved surface area, and the first annular light-shielding members 530 are located in the planar area and extend to cover a portion of the curved surface area.
Specifically, the lens module in this embodiment is a WLO lens module, and is mounted on the photosensitive surface of a sensing module 600. The lens assembly 500 of the lens module has two lenses stamped together, and includes a first lens 510 and a second lens 520 sequentially disposed from top to bottom, wherein the second lens 520 is closer to the sensing module 600 than the first lens 510. The first lens 510 and the second lens 520 each include a curved surface area and a planar area surrounding the curved surface area, and the curved surface areas of the first lens 510 and the second lens 520 correspond in position in the thickness direction, and the planar areas also correspond in position in the thickness direction. The first annular shade 530 is located between the first lens 510 and the second lens 520, and is located in the planar area and extends over a portion of the curved area. Since the edge of the curved surface region generally has astigmatism or distortion, the first ring-shaped light-shielding member 530 can cover the edge of the curved surface region, thereby preventing the edge of the curved surface region from affecting the image quality. When the incident light L3 is incident into the lens assembly 500 from the upper surface of the first lens 510, at some incident angles (angles that may generate reflected stray light), the first annular light-shielding member 530 can better shield the reflected stray light, and prevent the reflected stray light from entering the sensing module 600, so as to avoid glare or ghost caused by the reflected stray light, thereby improving the image quality.
As an alternative embodiment, the lens group 500 in the present invention is not limited to include two lenses, and may also include 3, 4 or 5 lenses, and the first annular light shielding member 530 may be located between each adjacent lens, or may be located between some adjacent lenses. That is, the first annular light shielding member 530 may be disposed between adjacent lenses, or the first annular light shielding member 530 may not be disposed, as long as at least one first annular light shielding member 530 is ensured.
In this embodiment, the first annular light-shielding member 530 is made of black photoresist, so that the first annular light-shielding member 530 can be formed by an exposure process during the preparation of the lens assembly 500, the preparation process is simple, and the shape and size of the first annular light-shielding member 530 can be easily controlled. Of course, the material of the first annular light shielding member 530 may also be other materials, such as a metal material or plastic, and the present embodiment is not limited.
A second annular light-shielding member (not shown) may be further disposed on the lens surface at the end of the lens group 500, that is, the second annular light-shielding member may be disposed on the upper surface of the first lens 510 and/or the upper surface of the second lens 520. Optionally, the second annular light-shielding member disposed on the upper surface of the first lens 510 may only cover a planar area of the first lens 510, so as to avoid affecting the amount of light entering the lens module.
The second annular light shading part is easy to damage due to the fact that the second annular light shading part needs to be in contact with the environment, in the embodiment, the second annular light shading part is made of metal materials or plastics, and therefore the second annular light shading part has higher abrasion resistance and stability. It should be understood that the second annular light-shielding members can be disposed at both ends of the lens assembly 500, and can also be disposed at either end of the lens assembly 500. Of course, the material of the second annular light shielding member may also be black photoresist or other materials.
Based on this, as shown in fig. 17, the present embodiment further provides a camera, which includes a sensing module 600 and the lens module, where the lens module can be disposed on the sensing module 600 through a surface mount technology.
In summary, the method for manufacturing a lens module according to the embodiment of the invention includes: step S1: providing a bottom die, and forming a lens material layer on the bottom die; step S2: providing a top die, aligning and pressing the top die and the bottom die, and solidifying the lens material layer to form a plurality of lenses, wherein each lens comprises a curved surface area and a plane area surrounding the curved surface area; step S3: forming a layer of the lens material on the lens; step S4: performing the step S2 again to form the lens module, or repeating the steps S2 and S3 at least once until the lens module is formed; wherein, after the step S2 is performed for the first time and/or after the step S2 is repeatedly performed, a first annular light-shielding member is formed on each lens, and the first annular light-shielding member is located in the planar area and extends to cover part of the curved area. The first annular light shading part can be embedded between adjacent lenses, and reflected stray light is shaded by the first annular light shading part, so that the phenomenon of glare or ghost images is avoided, and the image quality is improved; according to the preparation method of the lens module, the first annular shading part for covering part of the curved surface area of the lens can be formed, so that the shading effect is improved, and reflected stray light is further blocked; since the edge of the curved surface area generally has astigmatism or distortion, the first annular light shielding member can cover the edge of the curved surface area, so that the edge of the curved surface area can be prevented from influencing the imaging quality; in addition, the invention also provides a lens module comprising the first annular light shading part and a camera.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method for manufacturing a lens module is characterized by comprising the following steps:
step S1: providing a bottom die, and forming a lens material layer on the bottom die;
step S2: providing a top die, aligning and pressing the top die and the bottom die, solidifying the lens material layer and removing the top die to form a plurality of lenses, wherein each lens comprises a curved surface area and a plane area surrounding the curved surface area;
step S3: forming a layer of the lens material on the lens;
step S4: performing the step S2 again to form the lens module, or repeating the steps S2 and S3 at least once until the lens module is formed;
wherein, after the step S2 is performed for the first time and/or after the step S2 is repeatedly performed, a first annular light-shielding member is formed on each lens, and the first annular light-shielding member is located in the planar area and extends to cover part of the curved area.
2. The method of manufacturing a lens module according to claim 1, wherein in step S4, after repeating steps S2 and S3, the method further comprises:
step S2 is executed again to form the lens module.
3. The method for manufacturing a lens module according to claim 1 or 2, wherein the step of forming a first annular light-shielding member on each lens includes:
coating a black photoresist on the lens;
and exposing the black photoresist to form a patterned black photoresist, wherein the patterned black photoresist comprises a plurality of first annular shading pieces which are in one-to-one correspondence with the lenses.
4. The method for manufacturing a lens module according to claim 1 or 2, wherein the material of the lens material layer is a thermosetting material, and the lens material layer is heated to be cured; or the lens material layer is made of a photosensitive material, the bottom die and the top die are made of light-transmitting materials, and the lens material layer is exposed to light to be cured.
5. The method of manufacturing a lens module according to claim 1 or 2, wherein after the forming of the lens module, the method further comprises:
and cutting the lens module into a lens module comprising a single lens and/or a lens module comprising at least two lenses.
6. The lens module, characterized in that, the lens module includes:
a lens group comprising at least two lenses embossed together;
each first annular shading piece is located between two adjacent lenses and comprises a curved surface area and a planar area surrounding the curved surface area, and the first annular shading pieces are located in the planar area and extend to cover part of the curved surface area.
7. The lens module as claimed in claim 6, wherein a second annular light-shielding member is further disposed on the lens surface at the end of the lens group, and the material of the second annular light-shielding member comprises a metal material or a plastic material.
8. The lens module as claimed in claim 6, wherein the material of the first annular light-shielding member includes black photoresist.
9. The lens module as claimed in any one of claims 6-8, wherein the lens module is a WLO lens module.
10. A camera comprising a sensor module and the lens module as claimed in any one of claims 6 to 9, wherein the lens module is disposed on a photosensitive surface of the sensor module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911330282.0A CN111070742A (en) | 2019-12-20 | 2019-12-20 | Lens module, manufacturing method thereof and camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911330282.0A CN111070742A (en) | 2019-12-20 | 2019-12-20 | Lens module, manufacturing method thereof and camera |
Publications (1)
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Application publication date: 20200428 |