CN102955217B - Optical lens module - Google Patents

Abstract

An optical lens module includes a first lens unit, a second lens unit and an adhesive layer. The adhesive layer is arranged between the first lens unit and the second lens unit and is used for bonding the first lens unit and the second lens unit and enabling the first lens unit and the second lens unit to be separated by a specific distance. Therefore, the first lens unit and the second lens unit can be effectively and fixedly connected with each other, and the distance between the first lens unit and the second lens unit can be properly adjusted by changing the thickness of the adhesive layer, so that the efficiency of the optical system can be ensured.

Description

Optical lens module

【Technical field】

The invention relates to an optical lens module, in particular to an optical lens module with an adhesive layer.

【Background technique】

The camera lens used in general mobile phones usually contains an optical lens module, which is mostly composed of different lenses stacked on each other. However, in view of the shortcomings of the traditional lens stacking method, such as low alignment accuracy and difficult assembly, and It is difficult to accurately grasp the distance between the lenses, so how to improve the traditional optical lens module structure and manufacturing method to enhance its optical performance has become an important issue.

【Content of invention】

An embodiment of the present invention provides an optical lens module, including a first lens unit, a second lens unit and an adhesive layer. The first lens unit has a first optical surface and a second optical surface, wherein the first and second optical surfaces are located on opposite sides of the first lens unit, and the second lens unit has a third optical surface and a fourth optical surface. Optical surfaces, wherein the first, second, third and fourth optical surfaces are arranged in sequence along an optical axis direction, the third and fourth optical surfaces are located on the opposite side of the second lens unit, and the third optical surface is facing the first Two optical surfaces. The aforesaid adhesive layer is arranged between the first and second lens units, and is used for bonding the first and second lens units, and makes a specific distance between the first and second lens units.

In one embodiment, the aforementioned first lens unit includes a first substrate, a first lens, and a second lens, and the first and second lenses are located on opposite sides of the first substrate.

In one embodiment, the aforementioned second lens unit includes a second substrate, a third lens, and a fourth lens, and the third and fourth lenses are located on opposite sides of the second substrate.

In one embodiment, the aforementioned first and second substrates are made of glass material, and the first, second, third and fourth lenses are made of optical glue.

In one embodiment, the aforementioned second and third optical surfaces are respectively formed on the second and third lenses.

In one embodiment, the second lens has a first joint surface adjacent to the second optical surface, and the third lens has a second joint surface adjacent to the third optical surface, wherein the adhesive layer bonds the first and second optical surfaces. The joint surface is used to make a specific distance between the first and second lens units.

In one embodiment, the aforementioned first and second joint surfaces are planes.

In one embodiment, the aforementioned second optical surface has a first diameter D1, and the third optical surface has a second diameter D2, wherein 0.9<D1/D2<1.1.

In one embodiment, the aforementioned first lens unit has a first outer diameter D11, and the second lens unit has a second outer diameter D21, wherein D11-D1>0.4mm, and D21-D2>0.4mm.

In one embodiment, the aforementioned first lens unit has a first outer diameter D11, and the second lens unit has a second outer diameter D21, wherein 0.99<D21/D11<1.01.

In one embodiment, the aforementioned second optical surface is composed of at least one concave surface and at least one convex surface.

In one embodiment, the aforementioned second optical surface has a protruding structure extending toward the direction of the second lens unit and embedded in the second lens unit.

In one embodiment, the aforementioned optical lens module is fabricated by wafer-level packaging.

To sum up, the present invention provides an optical lens module, wherein an adhesive layer is provided between the first and second lens units, and the first and second lens units can be separated by the thickness of the adhesive layer itself. A specific distance, so that not only the first and second lens units can be fixed and bonded to each other effectively, but also the distance between the first and second lens units can be adjusted appropriately by changing the thickness of the adhesive layer, so that Ensure the performance of the optical system.

In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, preferred embodiments are specifically described below together with the accompanying drawings.

【Description of drawings】

FIG. 1 shows a schematic diagram of an optical lens module according to an embodiment of the present invention;

2 shows a schematic diagram of manufacturing an optical lens module with a wafer-level packaging (WLPWaferLevelPackage) process;

FIG. 3 shows a schematic diagram of an optical lens module according to another embodiment of the present invention; and

FIG. 4 is a schematic diagram of an optical lens module according to another embodiment of the present invention.

first lens unit 10

first substrate 11

first lens 12

second lens 13

Second lens unit 20

second substrate 21

third lens 22

Fourth lens 23

Adhesive layer 30

Optical axis C

distance d

first diameter D1

Second diameter D2

First outer diameter D11

Second outer diameter D21

The first optical surface S1

Second optical surface S2

Third optical surface S3

Fourth optical surface S4

First joint surface S10

Second joint surface S20

【detailed description】

First please refer to FIG. 1 , an optical lens module according to an embodiment of the present invention can be set in a photographic or photographic lens, and mainly includes a first lens unit 10 , a second lens unit 20 and an adhesive layer 30 . As shown in Figure 1, the aforementioned first lens unit 10 is mainly composed of a first substrate 11, a first lens 12 and a second lens 13, wherein the first and second lenses 12, 13 are located on the first substrate 11 The opposite side of the second lens unit 20 is mainly composed of a second substrate 21, a third lens 22 and a fourth lens 23, wherein the third and fourth lenses 22, 23 are located on the opposite side of the second substrate 21 side.

It can be seen from FIG. 1 that the first and second lenses 12 and 13 on both sides of the first substrate 11 are respectively formed with a first optical surface S1 and a second optical surface S2, which are located on both sides of the second substrate 21. The third and fourth lenses 22 and 23 respectively form a third optical surface S3 and a fourth optical surface S4, wherein the first, second, third and fourth optical surfaces S1-S4 can be, for example, spherical or non-spherical. Different types of curved surfaces such as spherical surfaces are arranged in sequence along the direction of the optical axis C, and light can pass through the optical lens module through the first, second, third and fourth optical surfaces S1-S4 from left to right.

In this embodiment, the aforementioned first and second substrates 11 and 21 are made of glass material, and the first, second, third and fourth lenses 12, 13, 22 and 23 are made of optical glue. The two lenses 12 and 13 can be formed on both sides of the first substrate 11 by ultraviolet curing; similarly, the third and fourth lenses 22 and 23 can also be formed on both sides of the second substrate 21 by ultraviolet curing.

It should be understood that a first joint surface S10 is additionally formed inside the aforementioned second lens 12, wherein the first joint surface S10 is a plane adjacent to and surrounding the second optical surface S2; correspondingly, the third lens 22 Then there is a second joint surface S20 , wherein the second joint surface S20 is also a plane, adjacent to and surrounding the third optical surface S3 of the third lens 22 . As shown in FIG. 1 , the first and second joint surfaces S10 and S20 located inside the first and second lens units 10 and 20 are bonded and fixed to each other by an adhesive layer 30 so that the first and second lenses The units 10, 20 may be separated by a certain distance d.

As mentioned above, the present invention mainly arranges the adhesive layer 30 between the first and second lens units 10, 20, and can make the first and second lens units 10, 20 through the thickness of the adhesive layer 30 itself. There is a specific distance d between them, wherein the above-mentioned adhesive layer 30 can adopt adhesive films of various colors or curable optical adhesives. It should be noted that the aforementioned first lens unit 10 has a first outer diameter D11, and the second lens unit has a second outer diameter D21. In order to avoid the difference between the outer diameters of the first and second lens units 10, 20 Large, the first and second outer diameters D11 and D21 in this embodiment need to meet the constraint condition of 0.99<D21/D11<1.01, which can effectively reduce the difficulty of assembly and greatly improve the quality of the product. Rate.

Please continue to refer to FIG. 1, the second optical surface S2 on the second lens 13 is facing the third optical surface S3 on the third lens 22, wherein the second optical surface S2 has a first diameter D1, and the third optical surface is It has a second diameter D2. It should be understood that, in order to avoid the large diameter difference between the second and third optical surfaces S2 and S3 from affecting the performance of the optical system, the first and second diameters D1 and D2 in this embodiment need to satisfy 0.9<D1 The limiting condition of /D2<1.1 can avoid ghost reflection and ensure the performance of the optical system. In addition, in order to ensure that the first and second joint surfaces S10 and S20 around the second and third optical surfaces S2 and S3 have sufficient joint areas, the first and second diameters D1, D2 and the first and second outer diameters D11 and D21 also need to meet the two restrictive conditions of D11-D1>0.4mm and D21-D2>0.4mm, so as to ensure that the adhesive layer 30 can effectively bond the first and second diameters. The two bonding surfaces S10, S20 further enable the first and second lens units 10, 20 to be firmly bonded to each other.

Next, please refer to FIG. 2 , the above-mentioned optical lens module, for example, can be fabricated by using WLPWaferLevelPackage (WLPWaferLevelPackage). Form the third and fourth lenses 22 and 23 on both sides of the lens 21, and then apply an adhesive layer 30 between the first and second lens units 10 and 20 to fix and bond them to each other, thereby not only improving the process accuracy, but also At the same time, the production efficiency can be greatly improved.

Please also refer to Fig. 3, 4 again, except the curved surfaces of different types such as aforementioned spherical surface or aspherical surface, the second and third optical surfaces S2 and S3 located inside the first and second lens units 10 and 20 can also be formed by two A combination of more than one surface of different types (such as a combination of concave and convex surfaces). For example, the upper and lower sides of the second optical surface S2 as shown in FIG. Protruding structures are also formed on the upper and lower sides of the third optical surface S3 shown, and the aforementioned protruding structures extend to the left and are embedded in the first lens unit 10 .

To sum up, the present invention provides an optical lens module, in which the first and second lens units can be controlled by setting the adhesive layer 30 between the first and second lens units 10, 20 and through the thickness of the adhesive layer 30 itself. The second lens unit 10, 20 is separated by a specific distance d, so that not only the first and second lens unit 10, 20 can be fixedly bonded to each other effectively, but also the thickness of the adhesive layer 30 can be changed to properly adjust the second lens unit. 1. The distance between the second lens units 10 and 20 can ensure the performance of the optical system.

Although the present invention is disclosed by the aforementioned embodiments, they are not intended to limit the present invention. Those skilled in the technical field of the present invention may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims (11)

1. an optical mirror slip module, comprising:

One first lens unit, have one first optical surface and one second optical surface, wherein this first, second optical surface is positioned at the opposition side of this first lens unit;

One second lens unit, there is one the 3rd optical surface and one the 4th optical surface, wherein this first, second, third and the 4th optical surface sequentially along one optical axis direction arrangement, three, the 4th optical surface is positioned at the opposition side of this second lens unit, and the 3rd optical surface is right against this second optical surface; And

One adhesive coating, is arranged between this first, second lens unit, in order to this first, second lens unit bonding, to make first, second lens unit described to interfix joint, and makes to be separated by between this first, second lens unit a specific range;

Further, the thickness of described adhesive coating itself can change, and then adjusts the specific range between first, second lens unit;

This second optical surface has one first diameter D1, and the 3rd optical surface has Second bobbin diameter D2, wherein a 0.9<D1/D2<1.1;

This first lens unit has one first outer diameter D 11, and this second lens unit has one second outer diameter D 21, wherein D11-D1>0.4mm, and D21-D2>0.4mm.

2. optical mirror slip module as claimed in claim 1, wherein this first lens unit comprises a first substrate, one first lens and one second lens, and these first, second lens are positioned at the opposition side of this first substrate.

3. optical mirror slip module as claimed in claim 2, wherein this second lens unit comprises a second substrate, one the 3rd lens and one the 4th lens, and the 3rd, the 4th lens are positioned at the opposition side of this second substrate.

4. optical mirror slip module as claimed in claim 3, wherein this first, second substrate contains glass material, and these first, second, third, fourth lens contain optical cement.

5. optical mirror slip module as claimed in claim 3, wherein this second, third optical surface is formed on these second, third lens respectively.

6. optical mirror slip module as claimed in claim 3, wherein these second lens have one first composition surface, this second optical surface adjacent, and the 3rd lens have one second composition surface, adjacent 3rd optical surface, wherein this adhesive coating this first, second composition surface bonding, uses and makes to be separated by between this first, second lens unit a specific range.

7. optical mirror slip module as claimed in claim 6, wherein this first, second composition surface is plane.

8. optical mirror slip module as claimed in claim 1, wherein this first lens unit has one first outer diameter D 11, and this second lens unit has one second outer diameter D 21, wherein 0.99<D21/D11<1.01.

9. optical mirror slip module as claimed in claim 1, wherein this second optical surface is made up of at least one concave surface and at least one convex surface.

10. optical mirror slip module as claimed in claim 1, wherein this second optical surface has a projective structure, extends and embed in this second lens unit towards this second lens unit direction.

11. optical mirror slip modules as claimed in claim 1, wherein this optical mirror slip module makes shaping with wafer-level packaging.