CN217238497U

CN217238497U - Lens module

Info

Publication number: CN217238497U
Application number: CN202221120597.XU
Authority: CN
Inventors: 林桂锋; 陈秀秀; 秦毅
Original assignee: Omnivision Optoelectronic Technologies Shanghai Co Ltd
Current assignee: Omnivision Optoelectronic Technologies Shanghai Co Ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-08-19
Anticipated expiration: 2032-05-10

Abstract

The utility model provides a lens module. The lens module comprises a photosensitive chip, a first lens and a second lens which are sequentially stacked from bottom to top; wherein, be provided with first bearing structure between sensitization chip and the first lens, be provided with second bearing structure between first lens and the second lens, first lens and second lens are integrated into one piece structure. Therefore, the joint and the problem of different expansion coefficients do not exist in the first lens and the second lens, the problem of cracking in the lenses can be solved, and the lens module can meet the requirements on optical performance and reliability; moreover, because first and second bearing structure have been set up alone to need not form the lens supporting part simultaneously when forming the lens, and then need not carry out special design to technology demolding angle and adhesion area when forming the lens, be favorable to obtaining the less lens of size, be favorable to reducing the size of lens module.

Description

Lens module

Technical Field

The utility model relates to a camera lens technical field, in particular to camera lens module.

Background

Electronic products such as mobile devices, computers, electronic watches and the like are all provided with lens modules in order to have photographing and shooting functions. Generally, the lens module needs to combine two aspects of material characteristics and structural design to make the lens module satisfy the requirements of optical performance and reliability, but the currently manufactured lens module has a larger size.

Fig. 1 shows a cross-sectional structure of a lens module, which includes a photo-sensing chip 103, a first lens 101, and a second lens 102 stacked from bottom to top as shown in fig. 1. The first mirror 101 includes a first substrate 101a and a first lens 101b reproduced on the first substrate 101 a; the second lens 102 includes a second substrate 102a, and a second lens 102b and a third lens 102c respectively reprinted on both sides of the second substrate 102 a; supporting structures 104 are disposed between the photosensitive chip 103 and the first lens 101 and between the first lens 101 and the second lens 102.

In the lens module shown in fig. 1, the materials of the substrate and the lens are different, the difference between the thermal expansion coefficients of the substrate and the lens is large, and the expansion degrees of the substrate and the lens are different at high temperature, so that the joints between the substrate and the lens are easily cracked, specifically, the joint between the first substrate 101a and the first lens 101b, the joint between the second substrate 102a and the second lens 102b, and the joint between the second substrate 102a and the third lens 102c are easily cracked, which affects the optical performance and reliability of the first lens 101 and the second lens 102, and further reduces the optical performance and reliability of the lens module.

Fig. 2 shows a cross-sectional structure of another lens module, as shown in fig. 2, which includes a photo chip 203, a first mirror 201, and a second mirror 202 stacked from bottom to top. The first lens 201 and the second lens 202 have a U-shaped cross section, that is, the first lens 201 and the second lens 202 have a deeper groove on the side facing the light sensing chip 203. Specifically, the first lens 201 includes a lens portion 201a (i.e., the bottom of the U-shape) and a support portion 201b (i.e., the two side ends of the U-shape), and the surface of the lens portion 201a includes a curved surface, wherein the first lens 201 is formed by injection molding, i.e., the first lens 201 is an integrally molded structure. Similarly, the second lens 202 is also an integrally formed structure and the second lens 202 has a supporting portion.

In the lens module of fig. 2, the first lens 201 and the second lens 202 are both integrally formed, taking the first lens 201 as an example, the lens portion 201a and the supporting portion 201b are made of the same material and have no joint, so that the lens is not prone to internal cracking after high temperature impact; however, when forming the lens having the lens portion 201a and the supporting portion 201b, the process release angle and the adhesion area need to be specially designed, for example, the process release angle (corresponding to ≦ 1 in fig. 2) needs to be greater than 135 degrees, so that the size of the lens to be manufactured is larger, and the size of the lens module is larger. That is, the lens module in fig. 2 has a large size although it has good optical performance and reliability.

Therefore, it is important to reduce the size of the lens module and to satisfy the requirements of optical performance and reliability.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lens module can be when reducing lens module size for the lens module satisfies the requirement of optical property and reliability.

In order to solve the above problem, the utility model provides a lens module. The lens module comprises a photosensitive chip, a first lens and a second lens which are sequentially stacked from bottom to top; the photosensitive chip is arranged on the first lens, the second lens is arranged on the second lens, and the first lens and the second lens are of an integrally formed structure.

Optionally, the first lens and the second lens are both in a straight shape in cross section.

Optionally, the first lens comprises a central area and an edge area surrounding the central area, the surface of the first lens central area comprises a curved surface, and the surface of the first lens edge area comprises a flat surface; the second lens includes a central zone and an edge zone surrounding the central zone, the surface of the central zone of the second lens including a curved surface and the surface of the edge zone of the second lens including a flat surface.

Optionally, the curved surface comprises a concave surface or a convex surface.

Optionally, the shape of the opposing surfaces of the first lens and the second lens are different.

Optionally, an adhesive layer is disposed between the first supporting structure and the photosensitive chip, between the first supporting structure and the first lens, between the second supporting structure and the first lens, and between the second supporting structure and the second lens.

Optionally, the lens module further includes a lens barrel, and the photosensitive chip, the first supporting structure, the first lens, the second supporting structure, and the second lens are stacked in the lens barrel.

Optionally, the top surface of the lens barrel has an opening, and the opening corresponds to a central area of the second lens.

Optionally, the first support structure and the second support structure each comprise an annular gasket.

Optionally, the inner ring section of the annular gasket is trapezoidal.

The lens module of the utility model comprises a photosensitive chip, a first lens and a second lens which are stacked in sequence from bottom to top; the photosensitive chip is provided with a first supporting structure between the first lens, the first lens is provided with a second supporting structure between the second lens, and the first lens and the second lens are both of an integrally formed structure. Therefore, the joint does not exist in the first lens and the second lens, and the problem of different expansion coefficients does not exist in the first lens and the second lens, so that the problem of internal cracking of the lenses after high-temperature impact can be solved, the lenses can meet the requirements of optical performance and reliability, and the lens module can meet the requirements of the optical performance and the reliability; moreover, because first bearing structure and second bearing structure have been set up alone for first lens and second lens need not include the supporting part, thereby need not form the lens supporting part simultaneously when forming the lens (including first lens and second lens), and then need not carry out special design to technology demolding angle and adhesion area when forming the lens, are favorable to obtaining the less lens of size, and then are favorable to reducing the size of camera lens module.

Drawings

Fig. 1 is a schematic cross-sectional view of a lens module.

Fig. 2 is a schematic cross-sectional view of another lens module.

Fig. 3 is a schematic cross-sectional view of a lens module according to an embodiment of the present invention.

Description of reference numerals:

(fig. 1) 101-first lens; 101 a-a first substrate; 101 b-a first lens; 102-a second lens; 102 a-a second substrate; 102 b-a second lens; 102 c-a third lens; 103-a photosensitive chip; 104-a support structure;

(fig. 2) 201-a first lens; 201 a-lens portion; 201 b-a support; 202-a second lens; 203-photosensitive chip;

(FIG. 3) 301-photosensitive chip; 302-a first support structure; 303-a first lens; 303 a-convex surface; 303 b-plane; 304-a second support structure; 305 a-a concave surface; 305 b-plane; 306-a lens barrel; 307-adhesive glue layer.

Detailed Description

In order to reduce the lens module size in for the lens module satisfies the requirement of optical property and reliability, the utility model provides a lens module.

Fig. 3 is a schematic cross-sectional view of a lens module according to an embodiment of the present invention. The lens module provided by the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

As shown in fig. 3, the lens module includes a photosensitive chip 301, a first lens 303 and a second lens 305 stacked in sequence from bottom to top, wherein a first supporting structure 302 is disposed between the photosensitive chip 301 and the first lens 303, a second supporting structure 304 is disposed between the first lens 303 and the second lens 305, and the first lens 303 and the second lens 305 are both integrally formed structures, so that there is no joint and no problem of different expansion coefficients in the first lens 303 and the second lens 305, the problem of internal cracking of the lens after high temperature impact can be improved, the lenses (i.e., the first lens 303 and the second lens 305) satisfy the requirements of optical performance and reliability, and further the lens module satisfies the requirements of optical performance and reliability. Moreover, in the lens module of this embodiment, the first supporting structure 302 is disposed between the first lens 303 and the photosensitive chip 301, the second supporting structure 304 is disposed between the second lens 305 and the first lens 303, so that the first lens 303 and the second lens 305 do not need to include a supporting portion, i.e., the lens supporting portion does not need to be formed simultaneously when the lenses are formed, and therefore, the special design for the process demolding angle and the adhesion area is not needed when the lenses are formed, which is beneficial to obtaining the lenses with small size, and further beneficial to reducing the size of the lens module. That is to say, the lens module of the embodiment can reduce the size of the lens module and simultaneously make the lens module meet the requirements of optical performance and reliability.

Referring to fig. 3, the first lens 303 and the second lens 305 each have a straight cross-sectional shape. The first lens 303 includes a central zone and an edge zone surrounding the central zone, the surface of the central zone of the first lens 303 including a curved surface and the surface of the edge zone of the first lens 303 including a flat surface. The second lens piece 305 includes a central zone and an edge zone surrounding the central zone, the surface of the central zone of the second lens piece 305 including a curved surface and the surface of the edge zone of the second lens piece 305 including a flat surface. The curved surface includes a concave surface or a convex surface.

As an example, for the side of the first lens 303 facing the second lens 305, the surface of the central area of the first lens 303 is a convex surface 303a, and the surface of the edge area of the first lens 303 is a flat surface 303 b; for the side of the first lens 303 facing the photosensitive chip 301, the surface of the first lens 303 is a plane. For the side of the second lens 305 facing away from the first lens 303, the surface of the central area of the second lens 305 is a concave surface 305a, and the surface of the edge area of the second lens 305 is a flat surface 305 b; for the side of the second lens 305 facing the first lens 303, the surface of the central area of the second lens 305 is convex and the surface of the edge area of the second lens 305 is flat. The shape of the opposing surfaces of the first lens 303 and the second lens 305 may be different. But not limited thereto, the surface shape of the central area of the first lens 303 and the surface shape of the central area of the second lens 305 can be designed as desired.

In this embodiment, the materials of the first lens 303 and the second lens 305 include a high molecular polymer, or both the first lens 303 and the second lens 305 are high molecular polymer lenses. Without limitation, the first lens 303 and the second lens 305 may be made of other materials that can be injected into a mold to form a lens of a predetermined shape.

In this embodiment, as shown in fig. 3, the first supporting structure 302 has two opposite end surfaces, one end surface of the first supporting structure 302 is joined to the surface of the edge area of the first lens 303, and the other end surface is joined to the surface of the edge area of the photosensitive chip 301. The second support structure 304 has opposite end surfaces, one end surface of the second support structure 304 engaging a surface of the edge area of the second lens 305 and the other end surface engaging a surface of the edge area of the first lens 303.

The first support structure 302 and the second support structure 304 each comprise an annular shim. The inner ring section of the annular gasket is trapezoidal, such as isosceles trapezoid. That is to say, the included angle between the inner ring surface of the annular gasket and the end surface is not equal to 90 °, and the included angle between the inner ring surface of the annular gasket and the end surface can be designed according to the optical requirements of the lens module. In this embodiment, the first support structure 302 and the second support structure 304 are made of glass. But not limited thereto, in other embodiments, the material of the first support structure 302 and the second support structure 304 may be other materials such as epoxy resin.

In this embodiment, the heights (i.e., the vertical dimension in fig. 3) of the first supporting structure 302 and the second supporting structure 304 can be selected according to the optical requirements of the lens module (specifically, each lens).

Referring to fig. 3, in this embodiment, an adhesive layer 307 is disposed between the first supporting structure 302 and the photo chip 301, between the first supporting structure 302 and the first lens 303, between the second supporting structure 304 and the first lens 303, and between the second supporting structure 304 and the second lens 305, so that the photo chip 301, the first supporting structure 302, the first lens 303, the second supporting structure 304, and the second lens 305 are adhered to form a whole.

In this embodiment, the lens module further includes a lens barrel 306, the photosensitive chip 301, the first supporting structure 302, the first lens 303, the second supporting structure 304, and the second lens 305 are stacked in the lens barrel 306, and the lens barrel 306 can protect internal components thereof.

The top surface of the lens barrel 306 has an opening corresponding to the central area of the second lens 305, so that incident light can pass through the second lens 305, the second support structure 304, the first lens 303 and the first support structure 302 from the opening and irradiate onto the photosensitive chip 301.

In this embodiment, other lenses may be further disposed on the second lens 305, other lenses may be disposed between the first lens 303 and the photosensitive chip 301, and adjacent lenses may be spaced by a supporting structure.

It should be understood that the terms "first," "second," "third," and the like in the description are used for distinguishing between various components, elements, steps, and the like, and are not used to indicate a logical or sequential relationship between various components, elements, steps, and the like, unless otherwise specified or indicated. Spatially relative terms, such as "under," "below," "beneath," "under," "above," "over," and the like, may be used herein for convenience in describing the relationship of one element or feature to another element or feature illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, then elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial descriptors used herein interpreted accordingly.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the claims of the present invention, and any person skilled in the art can use the above disclosed method and technical contents to make possible changes and modifications to the technical solution of the present invention without departing from the spirit and scope of the present invention, and therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical substance of the present invention all belong to the protection scope of the technical solution of the present invention.

Claims

1. A lens module is characterized by comprising a photosensitive chip, a first lens and a second lens which are sequentially stacked from bottom to top; the photosensitive chip is provided with a first supporting structure between the first lens, the first lens is provided with a second supporting structure between the second lens, and the first lens and the second lens are both of an integrally formed structure.

2. The lens module as recited in claim 1, wherein the first lens and the second lens have a substantially straight cross-sectional shape.

3. The lens module as recited in claim 2, wherein the first lens includes a central area and an edge area surrounding the central area, a surface of the central area of the first lens includes a curved surface, and a surface of the edge area of the first lens includes a flat surface; the second lens includes a central zone and an edge zone surrounding the central zone, the surface of the second lens central zone including a curved surface and the surface of the second lens edge zone including a flat surface.

4. The lens module as recited in claim 3, wherein the curved surface comprises a concave surface or a convex surface.

5. The lens module as recited in claim 3, wherein the opposing surfaces of the first and second lenses are shaped differently.

6. The lens module as recited in claim 1, wherein adhesive layers are disposed between the first supporting structure and the photo-sensing chip, between the first supporting structure and the first lens, between the second supporting structure and the first lens, and between the second supporting structure and the second lens.

7. The lens module as claimed in claim 1, wherein the lens module further includes a lens barrel, and the photo sensor chip, the first support structure, the first lens, the second support structure and the second lens are stacked in the lens barrel.

8. The lens module as claimed in claim 7, wherein the top surface of the lens barrel has an opening corresponding to a central region of the second lens.

9. The lens module as recited in claim 1, wherein the first support structure and the second support structure each comprise an annular gasket.

10. The lens module as claimed in claim 9, wherein the annular spacer has a trapezoidal inner ring cross-section.