TWI416238B - Spacer, lens group and lens module having the lens group - Google Patents

Abstract

The present invention relates to a spacer having a first surface and an opposite second surface and a lateral surface connected with the first surface and the second surface respectively. The spacer defines a through hole between the first surface and the second surface so as to allow light. The spacer defines a number of holding grooves. Each holding groove extends from the lateral surface to the inner of the spacer and communicates the first surface with the second surface. The invention also relates to a lens group and a lens module having the lens group.

Description

Shading sheet, lens group and lens module including the lens group

The present invention relates to the field of imaging technology, and in particular, to a light shielding sheet, a lens group, and a lens module including the lens group.

In recent years, with the development of multimedia technology, the application range of lens modules has become wider and wider. For example, it is used in portable electronic products such as digital cameras, video cameras, and mobile phones with shooting functions. While digital cameras, camcorders, and mobile phones with shooting functions are being miniaturized, there is a higher demand for the image quality of the objects they shoot, that is, the image of the object to be photographed is more clear.

The image quality of the subject is largely determined by the alignment of the optical axes of the lenses in the lens module. Alpheus W. Burner et al., Paper Lens Calibration For Wind Tunnel Measurements, presented at the 1995 SPIE System, Videometrics IV, explains that the optical axes of the lenses in the lens module are not aligned. And the impact.

The lens module of the prior art includes a lens barrel and a first lens, a light shielding film and a second lens which are sequentially disposed in the lens barrel. The cover between the first lens and the second lens The light sheet is used to block stray light passing through the non-optical imaging area of the lens so that the light beams transmitted through the optical zone of each lens cooperate with each other. However, when assembling the lens module, the first lens and the first lens are aligned and fixed, and the second lens is aligned with the light shielding film, and finally the light shielding film is disposed on the first lens and the second lens. between. The assembly process requires two alignment and fixing processes of the visor and the lens to increase the number of alignments, and the optical axis misalignment caused by the alignment error may occur, and the assembly time and cost of the lens module may be increased.

In view of this, it is necessary to provide a light shielding film, a lens group, and a lens module including the lens group to reduce the alignment and fixing process during assembly, and reduce the assembly time and cost of the lens module.

Hereinafter, a light shielding sheet, a lens group, and a lens module including the lens group will be described by way of embodiments.

A light shielding sheet having opposite first and second surfaces and a side surface between the first surface and the second surface and contacting the first surface and the second surface. The light shielding sheet is provided with a through hole penetrating the first surface and the second surface for light transmission and imaging with other components. The light shielding sheet is provided with a fixing groove extending from the outer side toward the inside of the light shielding sheet and penetrating the first surface and the second surface.

A lens set includes a first lens, a second lens, and a light shielding film disposed between the first lens and the second lens. The first lens includes a first optical portion and a first fixing portion connected to and surrounding the first optical portion. The second lens includes a second optical portion and a second fixing portion connected to and surrounding the second optical portion. The light shielding sheet is opposite to the first surface and the second surface, and the first surface and the second surface are directly adjacent to the first surface and the second surface. The first surface is in contact with the first fixed portion of the first lens. The second surface is in contact with the second fixing portion of the second lens, so that the first lens, the light shielding film and the second lens are fixed by the adhesive phase received in the fixing groove.

A lens module includes a lens barrel and a lens group disposed in the lens barrel. The lens set includes a first lens, a second lens, and a light shielding film disposed between the first lens and the second lens. The first lens includes a first optical portion and a first fixing portion connected to and surrounding the first optical portion. The second lens includes a second optical portion and a second fixing portion connected to and surrounding the second optical portion. The light shielding sheet is opposite to the first surface and the second surface, and the first surface and the second surface are directly adjacent to the first surface and the second surface. The first surface is in contact with the first fixed portion of the first lens. The second surface is in contact with the second fixing portion of the second lens, so that the first lens, the light shielding film and the second lens are fixed by the adhesive phase received in the fixing groove, and are fixed by the adhesive The inner wall of the lens barrel.

Compared with the prior art, the fixing groove of the light shielding sheet is used for accommodating the adhesive, so that the components located on opposite sides of the light shielding sheet or adjacent to the light shielding sheet can be fixed to the light shielding sheet by the adhesive. Simplify the assembly process and cost.

10‧‧ ‧ shading film

11‧‧‧ first surface

12‧‧‧ second surface

13‧‧‧Outside

14‧‧‧Fixed grooves

141‧‧‧First bonding surface

142‧‧‧Second bonding surface

143‧‧‧ third bonding surface

15‧‧‧through hole

20‧‧‧ lens group

21‧‧‧ first lens

211‧‧‧First Optical Department

212‧‧‧First Fixed Department

213‧‧‧ first fixed surface

22‧‧‧second lens

221‧‧‧Second Optics

222‧‧‧Second fixed department

223‧‧‧Second fixed surface

30‧‧‧Lens module

31‧‧‧Mirror tube

311‧‧‧ inner wall

FIG. 1 is a schematic structural view of a light shielding sheet provided by an embodiment of the present technical solution.

2 is an exploded view of a lens module provided by an embodiment of the present technical solution.

3 is a cross-sectional view of a lens module provided by an embodiment of the present technical solution.

The light shielding sheet, the lens group and the lens module including the lens assembly provided by the embodiments of the present technical solution will be further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1 , the technical solution provides a light shielding sheet 10 having a first surface 11 and a second surface 12 opposite to each other and between the first surface 11 and the second surface 12 and the first surface 11 and the second surface. 12 is connected to the outside side 13. The light shielding sheet 10 is provided with a through hole 15. The through hole 15 penetrates the first surface 11 and the second surface 12 for light transmission. The visor 10 is provided with a plurality of fixing grooves 14 extending from the outer side surface 13 toward the inside of the visor 10 and penetrating the first surface 11 and the second surface 12. Each of the fixing recesses 14 has a first bonding surface 141 opposite to the outer side surface 13 and a second bonding surface 142 and a third bonding surface 143 which are simultaneously connected to the outer side surface 13 and the first bonding surface 141. The adhesive is accommodated so that the light shielding film 10 is fixed to the adjacent object by the adhesive.

In the embodiment, the light shielding sheets 10 are annular and are provided with six fixing grooves 14 spaced along the circumference of the light shielding sheet 10. Preferably, the fixing grooves 14 are equally spaced along the circumference of the light shielding sheet 10. If the micro lens module is fabricated, the depth of the recess of the fixing groove 14 from the outer side surface 13 toward the inside of the light shielding sheet 10 is 0.1 to 0.2 mm.

Referring to FIG. 2 and FIG. 3 , the lens module 30 of the present invention includes a lens barrel 31 and a lens group 20 of the embodiment assembled in the lens barrel 31 along the optical axis.

The lens set 20 includes a first lens 21, a second lens 22, and a light shielding film 10 disposed between the first lens 21 and the second lens 22.

The first lens 21 has a first optical portion 211 and a first fixing portion 212. The first optical portion 211 corresponds to the through hole 15 of the light shielding sheet 10 for optical imaging of an object. The first fixing portion 212 is connected around the first optical portion 211 for fixing the first optical portion 212. The first fixing portion 212 has a first fixing surface 213 opposite to the light shielding sheet 10 . The first fixing surface 213 is in contact with the first surface 11 of the light shielding sheet 10. The portion of the first fixing surface 213 corresponding to the fixing groove 14 is exposed from the fixing groove 14 for contacting with the adhesive located in the fixing groove 14, thereby achieving fixation with the light shielding sheet 10.

The second lens 22 has a second optical portion 221 and a second fixed portion 222. The second fixing portion 222 is connected around the second optical portion 221 . The optical axis of the second optical portion 221 coincides with the optical axis of the first optical portion 211. The second fixing portion 222 has a second fixing surface 223 opposite to the light shielding sheet 10 . The second fixing surface 223 is in contact with the second surface 12 of the light shielding sheet 10. The portion of the second fixing surface 223 corresponding to the fixing groove 14 is exposed from the fixing groove 14 for contacting with the adhesive located in the fixing groove 14, thereby achieving fixation with the light shielding sheet 10.

In this embodiment, the inner diameter of the light shielding sheet 10 is equal to or slightly smaller than the diameter of the first optical portion 212 or the second optical portion 221 to ensure the effect of blocking stray light. The depth of the recess of the fixing groove 14 from the outer side surface 13 toward the inside of the light shielding sheet 10 is 0.1 to 0.2 mm. During assembly, the adhesive is received in the fixing groove 14 of the light shielding sheet 10, and the first fixing surface 213 and the second fixing surface 223 exposed from the fixing groove 14 and the first bonding surface 141 of the fixing groove 14 are simultaneously removed. The second bonding surface 142 is bonded to the third bonding surface 143, so that the first fixing portion 212 of the first lens 21, the second fixing portion 222 of the second lens 22, and the light shielding film 10 are fixed to each other, as shown in FIG. .

The lens barrel 31 has an inner wall 311. When assembled, the adhesive contained in the fixing groove 14 is simultaneously bonded to the inner wall 311 of the lens barrel 31, so that the first lens 21, the light shielding film 10 and the second lens 22 are bonded to each other while being fixed to the lens barrel. 31 inside.

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.

10‧‧ ‧ shading film

11‧‧‧ first surface

12‧‧‧ second surface

13‧‧‧Outside

14‧‧‧Fixed grooves

141‧‧‧First bonding surface

142‧‧‧Second bonding surface

143‧‧‧ third bonding surface

15‧‧‧through hole

Claims (6)

a light shielding sheet having a first surface and a second surface opposite to each other and a side surface between the first surface and the second surface and adjacent to the first surface and the second surface, the light shielding sheet is provided through the first surface The through hole with the second surface is used for light transmission, and the improvement is that the light shielding sheet is provided with a fixing groove extending from the outer side toward the inside of the light shielding sheet and penetrating through the first surface and the second surface, the fixing The groove is for receiving the adhesive, so that the light shielding sheet is fixed to the adjacent object by the adhesive. The light shielding sheet of claim 1, wherein the light shielding sheet is a circular ring, and the fixing grooves are distributed on the light shielding sheet along the circumference of the light shielding sheet. The light shielding sheet of claim 2, wherein the fixing grooves are equally spaced. The light shielding sheet of claim 1, wherein the fixing groove has a recess depth from the outer side facing the inside of the light shielding sheet of 0.1 to 0.2 mm. A lens set comprising a first lens and a second lens, the first lens comprising a first optical portion and a first fixing portion connected around the first optical portion, the second lens comprising a second optical portion and a connection a second fixing portion around the second optical portion, wherein the lens group further comprises the light shielding sheet according to any one of claims 1 to 4, wherein the first surface is in contact with the first fixing portion of the first lens, The second surface is in contact with the second fixing portion of the second lens, so that the first lens, the light shielding film and the second lens are fixed by the adhesive phase received in the fixing groove. A lens module includes a lens barrel, wherein the lens barrel is provided with the lens group of claim 5, and the lens group is fixed to the inner wall of the lens barrel by an adhesive contained in the fixing groove.