TWI453491B - Optical lens group and lens module - Google Patents

Description

Optical lens set and lens module

The invention relates to an optical system, in particular to an optical lens set and a lens module.

In recent years, with the development of multimedia technology, the application range of lens modules has become more and more extensive, such as in electronic products such as digital cameras, video cameras, and mobile phones with camera functions.

While people are pursuing miniaturization of digital cameras, camcorders and mobile phones, they also put forward higher requirements on the image quality of the objects they photographed, that is, the image of the object to be photographed is clear. The imaging quality of an object depends to a large extent on whether the optical axis of each lens in the lens module corresponds to the degree of deformation of the lens due to stress during assembly.

One type of lens assembly that is common in the prior art is that the adjacent lenses are provided with the same inclined angle of inclination. When assembled, the slopes of the two lenses are completely abutted against each other to ensure that the lens is fixed and not eccentric. However, there is stress between the inclined surfaces, and the existence of stress may cause adverse effects of the deformation of the lens. Since the pushing force of the entire inclined surface increases with the increase of the abutment area, the entire inclined surface is inevitably abutted against each other. The stress is too large to increase the deformation of the lens, which in turn affects the imaging quality of the assembled lens module.

In view of the above, it is necessary to provide an optical lens group and a lens module in which the stress between the lenses is small and the lens is not easily deformed.

An optical lens set comprising a first lens and a second lens, each of the first lens and the second lens comprising an optical portion and a non-optical portion surrounding the optical portion, the non-optical portion of the first lens facing The end surface of the second lens includes a first plane, a first slope, and a first bearing surface, which are sequentially connected, the first plane and the first bearing surface being perpendicular to an optical axis of the first lens, the second lens The non-optical portion has a second plane, a second bearing surface, and a second slope between the second plane and the second bearing surface toward the end surface of the first lens, the second plane and the second plane The bearing surface is perpendicular to the optical axis of the second lens, and the non-optical portion of the second lens further has a third inclined surface facing the end surface of the first lens, and the third inclined surface is located at the second inclined surface The second bearing surface and the second bearing surface are directly connected to each other, and the first inclined surface and the second inclined surface abut each other, and the first inclined surface and the third inclined surface have a gap therebetween. The first bearing surface and the second bearing surface abut each other.

A lens module includes a lens barrel and the optical lens group disposed in the lens barrel, the optical lens group being housed in the lens barrel.

Compared with the prior art, the optical lens assembly and the lens module of the embodiment of the present invention have a gap between the first bevel and the third bevel, thereby reducing the stress between the first lens and the second lens, thereby reducing the stress between the first lens and the second lens. Reducing the degree of deformation and deformation of the first and second lenses makes it easier to assemble the second lens onto the first lens.

100‧‧‧Optical lens group

10‧‧‧ first lens

11‧‧‧First Optical Department

12‧‧‧First Non-Optical Department

20‧‧‧second lens

21‧‧‧Second Optics

22‧‧‧Second Non-optical Department

30‧‧‧First spacer ring

121‧‧‧ first plane

122‧‧‧First slope

123‧‧‧First bearing surface

221‧‧‧ second plane

222‧‧‧Second slope

223‧‧‧ third slope

224‧‧‧Second bearing surface

200‧‧‧ gap

40‧‧‧ third lens

50‧‧‧ fourth lens

1‧‧‧ lens module

2‧‧‧Mirror tube

70‧‧‧Second spacer ring

60‧‧‧Image sensor

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of an optical lens unit of a first embodiment of the present invention.

Figure 2 is an enlarged view of II in Figure 1.

3 is a schematic view of a lens module according to a second embodiment of the present invention.

Referring to FIG. 1 and FIG. 2, the optical lens set 100 according to the first embodiment of the present invention includes a first lens 10 and a second lens 20.

The first lens 10 includes a first optical portion 11 and a first non-optical portion 12 surrounding the first optical portion 11. The first non-optical portion 12 has a first plane 121, a first slope, which are sequentially connected toward the end surface of the second lens 20. 122 and the first bearing surface 123. The first plane 121, the first inclined surface 122 and the first bearing surface 123 gradually approach the second lens 20, and the first plane 121 and the first bearing surface 123 are perpendicular to the optical axis of the first lens 10. The material of the first lens 10 is glass or plastic.

The second lens 20 includes a second optical portion 21 and a second non-optical portion 22 surrounding the second optical portion 21, and the second non-optical portion 22 has a first direction toward the end surface of the first lens 10 and gradually away from the first lens 10 The second plane 221, the second slope 222, the third slope 223 and the second bearing surface 224, the second plane 221 and the second bearing surface 224 are both perpendicular to the optical axis of the second lens 20. The material of the second lens 20 is glass or plastic.

The distance between the first plane 121 and the first bearing surface 123 is greater than the distance between the second plane 221 and the second bearing surface 224; the first bearing surface 123 and the second bearing surface 224 are closely abutted The first inclined surface 122 abuts the second inclined surface 222 but has a gap 200 between the third inclined surface 223, or the angle between the second inclined surface 222 and the optical axis of the second lens 20 is greater than the third inclined surface 223 and the second lens The angle between the 20 optical axes, and the angle is greater than 0.

In order to further fix the distance between the first lens 10 and the second lens 20, a first spacer ring 30 may be disposed between the first plane 121 and the second plane 221.

Since there is a gap between the first inclined surface 122 and the third inclined surface 223, the stress between the first lens 10 and the second lens 20 can be reduced, thereby reducing the degree of deformation of the lens. And the probability of deformation causes the second lens 20 to be assembled onto the first lens 10 more easily.

Of course, depending on the parameters of the first lens 10 and the second lens 20, the distance between the first plane 121 and the first bearing surface 123 may also be equal to the distance between the second plane 221 and the second bearing surface 224. The first plane 121 is brought into close contact with the second plane 221.

As shown in FIG. 3, a lens module 1 according to a second embodiment of the present invention includes a lens barrel 2, a first lens 10, a second lens 20, a third lens 40, a fourth lens 50, and an image sensor 60. A lens 10, a second lens 20, a third lens 40, and a fourth lens 50 are located within the lens barrel 2.

The third lens 40 and the second lens 20 are mutually abutted by a beveled card, and are spaced apart from the fourth lens 50 by a second spacer ring 70, and the external light passes through the first lens 10 and the second lens 20, The third lens 40 and the fourth lens 50 are imaged on the image sensor 60.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧Optical lens group

10‧‧‧ first lens

11‧‧‧First Optical Department

12‧‧‧First Non-Optical Department

20‧‧‧second lens

21‧‧‧Second Optics

22‧‧‧Second Non-optical Department

30‧‧‧First spacer ring

Claims (12)

An optical lens set comprising a first lens and a second lens, each of the first lens and the second lens comprising an optical portion and a non-optical portion surrounding the optical portion, the non-optical portion of the first lens facing The end surface of the second lens includes a first plane, a first slope, and a first bearing surface, which are sequentially connected, the first plane and the first bearing surface being perpendicular to an optical axis of the first lens, the second lens The non-optical portion has a second planar second inclined surface, a third inclined surface and a second bearing surface which are sequentially connected and gradually away from the first lens toward the end surface of the first lens, the second plane and the second bearing surface Vertically facing the optical axis of the second lens, the first inclined surface and the second inclined surface abut each other, and the first inclined surface and the third inclined surface have a gap therebetween, and the first bearing surface and the second bearing surface are offset by. The optical lens set according to claim 1, wherein a distance between the first plane and the first bearing surface is greater than a distance between the second plane and the second bearing surface. The optical lens set of claim 2, wherein a spacer ring is disposed between the first plane and the second plane for fixing a spacing between the first lens and the second lens. The optical lens set according to claim 1, wherein a distance between the first plane and the first bearing surface is equal to a distance between the second plane and the second bearing surface. The optical lens set according to any one of claims 1 to 4, wherein the material of the first lens is glass or plastic. The optical lens set according to claim 5, wherein the material of the second lens is glass or plastic. A lens module comprising a lens barrel and an optical lens set according to claim 1, wherein the optical lens group is housed in the lens barrel. The lens module of claim 7, wherein the first plane and the first The distance between the bearing faces is greater than the distance between the second plane and the second bearing face. The lens module of claim 8, wherein a spacer ring is disposed between the first plane and the second plane to fix a spacing between the first lens and the second lens. The lens module of claim 7, wherein a distance between the first plane and the first bearing surface is equal to a distance between the second plane and the second bearing surface. The lens module according to any one of claims 7 to 10, wherein the material of the first lens is glass or plastic. The lens module of claim 11, wherein the material of the second lens is glass or plastic.