CN206671593U - Anti-dazzling screen and the camera lens module with the anti-dazzling screen - Google Patents

Abstract

The utility model discloses a shading sheet and a lens module with the shading sheet. The shading sheet includes a hollow ring-shaped fixed part, a first fork and a second fork respectively bent and extended from the inner periphery of the fixed part toward the axis, the first fork and the second fork The angle θ is formed between the parts, and it satisfies 0°<θ<180°. The light-shielding sheet provided by the utility model not only solves the problem of a single structure of the light-shielding sheet, but also has a wide coverage area, thereby effectively eliminating stray light.

Description

Light-shielding sheet and lens module with the light-shielding sheet

【Technical field】

The utility model relates to a lens module, in particular to a light-shielding sheet and a lens module with the light-shielding sheet.

【Background technique】

With the continuous development of science and technology, electronic devices are constantly developing toward intelligence. In addition to digital cameras, portable electronic devices such as tablet computers and mobile phones are also equipped with lens modules. In order to meet people's needs, higher requirements are placed on the image quality of objects captured by the lens module. However, the impact quality of captured objects is largely related to stray light from reflections.

The lens module in the related art includes a lens barrel with a storage space, an imaging unit accommodated in the storage space, and a light-shielding sheet. Two lenses, the light-shielding sheet is arranged between the first lens and the second lens. The light-shielding sheet of the lens module in the related art is generally in the shape of a plane ring, which not only has a single structure, but also covers a small area, so that stray light cannot be effectively eliminated.

Therefore, it is necessary to provide a novel shading sheet.

【Content of utility model】

The purpose of the utility model is to provide a light-shielding sheet with a wide coverage area, which can effectively eliminate stray light, and a lens module with the light-shielding sheet.

The technical solution of the utility model is as follows: a shading sheet includes a hollow ring-shaped fixing part, a first fork and a second fork extending from the inner periphery of the fixing part toward the axis respectively, the first fork An included angle θ is formed between the fork and the second fork, and satisfies 0°<θ<180°.

A lens module includes a lens barrel with a storage space, an imaging unit accommodated in the storage space, and a light-shielding sheet, the imaging unit includes a first lens and a second lens arranged in sequence along the direction from the object side to the image side, The first lens includes a first contact surface facing the image side, the second lens includes a second contact surface facing the object side, and the shading sheet includes a contact surface sandwiched between the first contact surface and the second contact surface. A hollow ring-shaped fixing part between the surfaces, a first fork extending from the inner peripheral edge of the fixing part toward the first lens, and a first fork extending from the inner peripheral edge of the fixing part toward the second lens Fork.

Preferably, the first lens further includes a first optical surface facing the image side, the first contact surface is arranged around the first optical surface, and the second lens further includes a second optical surface facing the object side, The second contact surface surrounds the second optical surface, and the first optical surface and the second optical surface are relatively spaced apart.

Preferably, the first optical surface includes a first optical effective diameter area, and the second optical surface includes a second optical effective diameter area forming an imaging light interface with the first optical effective diameter area, and the imaging light interface Extending from the periphery of the first optical effective diameter region to the periphery of the second optical effective diameter region, the first fork and the second fork are located outside the imaging light interface.

Preferably, one end of the first fork close to the optical axis is a first end edge, one end of the second fork close to the optical axis is a second end edge, and the edge of the first optical surface forms a first end edge. a luminous flux boundary, the edge of the second optical surface forms a second luminous flux boundary, the distance between the first luminous flux boundary and the first end edge, and the distance between the second luminous flux boundary and the second The spacing between the terminal edges is all 0-0.2 mm.

Preferably, the first lens further includes a first inclined surface that connects the first contact surface and the first optical surface and is spaced apart from the first fork.

Preferably, the first lens further includes a first slope connecting the first contact surface and the first optical surface and abutting against the first fork.

Preferably, the second lens further includes a second slope connecting the second contact surface and the second optical surface and opposite to the second fork.

Preferably, the second lens further includes a second slope connecting the second contact surface and the second optical surface and abutting against the second fork.

Preferably, the imaging unit further includes at least one third lens arranged on the image side of the second lens, and the shading sheet is arranged between the second lens and the adjacent third lens.

Compared with the related art, the utility model has the beneficial effect that: by setting the shading sheet to include a ring-shaped fixing part, a first fork part bent and extending from the inner peripheral edge of the fixing part toward the axis, and The second fork, the angle θ is formed between the first fork and the second fork, and satisfies 0°<θ<180°, which not only solves the problem of a single structure of the shading sheet, but also covers the shading sheet The large area can effectively improve the shading effect and prevent the generation of stray light.

【Description of drawings】

Fig. 1 is a schematic structural view of a preferred embodiment of the lens module provided by the present invention;

FIG. 2 is a schematic structural diagram of part A of the lens module shown in FIG. 1 .

【detailed description】

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to FIG. 1 and FIG. 2 , the lens module 100 includes a lens barrel 1 having a receiving space 1A, an imaging unit 3 and a light-shielding sheet 5 accommodated in the receiving space 1A.

The lens barrel 1 includes a first barrel wall 11 forming a light hole 1C around the optical axis 1B, a second barrel wall 13 bent and extended from the first barrel wall 11, the first barrel wall 11 and the The accommodating space 1A enclosed by the second cylinder wall 13 .

The imaging unit 3 includes a first lens 31 and a second lens 33 arranged in sequence along the direction from the object side to the image side.

The first lens 31 includes a first contact surface 311 facing the image side, a first optical surface 313 facing the image side and surrounded by the first contact surface 311, and connecting the first contact surface 311 and the first optical surface 313. The first slope 312 of the optical surface 313 .

Edges of the first optical surface 313 form a first light flux boundary 315 .

The first optical surface 313 includes a first optical effective diameter area 317 .

The second lens 33 includes a second contact surface 331 facing the object side, a second optical surface 333 facing the object side and surrounded by the second contact surface 331, and connecting the second contact surface 331 and the second optical surface 333. The second inclined surface 332 of the optical surface 333 is arranged at an interval relative to the first optical surface 313 .

Edges of the second optical surface 333 form a second light flux boundary 335 .

The second optical surface 333 includes a second optical effective diameter region 337 forming an imaging light interface 3A with the first optical effective diameter region 317, and the imaging light interface 3A is formed from the periphery of the first optical effective diameter region 317 extending to the periphery of the second optical effective diameter region 337 .

Wherein, the optical effective diameter refers to the diameter of the effective imaging light passing range on the first optical surface 313 of the first lens 31 and the second optical surface 333 of the second lens 33, and it needs to be pointed out in particular Yes, when designing the lens of the existing imaging lens, those skilled in the art usually set a certain distance between the light flux boundary of the optical surface of the lens and the periphery of the optical effective diameter area of the lens.

The shading sheet 5 includes a hollow ring-shaped fixing portion 51 sandwiched between the first contact surface 311 and the second contact surface 331, extending from the inner peripheral edge of the fixing portion 51 toward the first lens. 31 bends and extends the first fork 55 and the second fork 59 bends and extends from the inner peripheral edge of the fixing part 51 toward the second lens 33, and the end of the first fork 55 close to the optical axis is the first The end edge 53, the end of the second fork portion 59 close to the optical axis is the second end edge 57, and the angle θ is formed between the first fork portion 55 and the second fork portion 59, and satisfies 0°<θ <180°. Wherein, the first fork 55 and the second fork 59 can select corresponding bending angles and extension lengths according to the specific structures of the first lens 31 and the second lens 33 . In the embodiment shown in the figure, the first fork 55 and the second fork 59 are respectively spaced apart from the first inclined surface 312 and the second inclined surface 332 and are respectively connected to the first inclined surface. 312 and the second slope 332 are parallel to each other. In other embodiments, the first fork and the second fork may abut against the first slope and the second slope respectively.

The fixing portion 51 is planar and ring-shaped, and its axis coincides with the optical axis 1B.

The first fork 55 and the second fork 59 are located outside the imaging light interface 3A, that is, the first fork 55 and the second fork 59 do not exceed the imaging light interface 3A range, so as to prevent the shading sheet 5 from blocking the imaging light.

In order to ensure effective elimination of stray light and reduce the impact caused by the reduction of light transmission, the distance between the first light flux boundary 315 and the first end edge 53 and the distance between the second light flux boundary 335 and the The distance between the second end edges 57 is 0-0.2 mm.

After several experiments, it is found that: when the distance between the first light flux boundary 315 and the first end edge 53 and the distance between the second light flux boundary 335 and the second end edge 57 are 0 When -0.2mm, it can not only ensure the passage of imaging light, but also shield stray light to the greatest extent; when the distance between the first light flux boundary 315 and the first end edge 53 and the second light flux If the distance between the border 335 and the second end edge 57 is greater than 0.2 millimeters, the effect of eliminating stray light will be reduced and the image quality will be affected.

In addition, the light-shielding sheet 5 is made of black plastic material or black film. The shading sheet 5 made of black plastic material through injection molding has high dimensional accuracy, and will not reduce the effect of shielding stray light due to manufacturing errors, or block too much effective imaging light, thereby affecting imaging quality.

In other embodiments, at least one third lens may also be added, and a shading sheet is provided between the second lens and the adjacent third lens.

The beneficial effect of the utility model is that: by setting the shading sheet 5 to include a ring-shaped fixing portion 51, a first fork 55 and a second fork extending from the inner peripheral edge of the fixing portion 51 to the axis respectively Two forks 59, the angle θ is formed between the first fork 55 and the second fork 59, and satisfies 0°<θ<180°, which not only solves the problem of a single structure of the shading sheet, but also the shading The sheet covers a wide area, so it can effectively improve the shading effect and prevent the generation of stray light.

What has been described above is only the embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, improvements can also be made without departing from the inventive concept of the utility model, but these all belong to Protection scope of the present utility model.

Claims (10)

1. A kind of 1. anti-dazzling screen, it is characterised in that：Including the fixed part in hollow and annular, respectively from the fixed part inner peripheral direction The first fork and the second fork of its axis bending extension, angle theta is formed between first fork and second fork, and Meet 0 °<θ<180°.
2. 2. a kind of camera lens module, including the lens barrel with receiving space, the imaging unit that is contained in the receiving space and screening Mating plate, the imaging unit include the first eyeglass and the second eyeglass set gradually along thing side to image side direction, first mirror Piece includes the first contact surface towards image side, and second eyeglass includes the second contact surface towards thing side, it is characterised in that：Institute State anti-dazzling screen include being located between first contact surface and second contact surface and in the fixed part of hollow and annular, from institute Fixed part inner peripheral is stated towards the first fork of first eyeglass bending extension and from described in fixed part inner peripheral direction Second fork of the second eyeglass bending extension.
3. 3. camera lens module according to claim 2, it is characterised in that：First eyeglass is also included towards the first of image side Optical surface, first contact surface are set around first optical surface, and second eyeglass is also included towards the second of thing side Optical surface, second contact surface is around second optical surface, and first optical surface is relative with second optical surface It is arranged at intervals.
4. 4. camera lens module according to claim 3, it is characterised in that：First optical surface includes the first optics effective diameter Region, the second optics that second optical surface includes being formed imaging light interface with the first optics effective diameter region are effective Footpath region, the periphery in imaging light interface from the first optics effective diameter region extend to the second optics effective diameter The periphery in region, first fork and second fork are positioned at the outside at the imaging light interface.
5. 5. camera lens module according to claim 4, it is characterised in that：One end of the close optical axis of first fork is the One end edge, one end of the close optical axis of second fork are second end edge, and the edge of first optical surface forms the One light leads to border, and the edge of second optical surface forms the second light and leads to border, and first light leads to border and the described first end The logical spacing between border and the second end edge of spacing and second light between ora terminalis is 0-0.2 millimeters.
6. 6. camera lens module according to claim 5, it is characterised in that：First eyeglass also includes connection described first and connect Contacting surface and first optical surface and the first inclined-plane set with the first fork relative spacing.
7. 7. camera lens module according to claim 5, it is characterised in that：First eyeglass also includes connection described first and connect Contacting surface and first optical surface and the first inclined-plane mutually abutted with first fork.
8. 8. camera lens module according to claim 5, it is characterised in that：Second eyeglass also includes connection described second and connect Contacting surface and second optical surface and the second inclined-plane set with the second fork relative spacing.
9. 9. camera lens module according to claim 5, it is characterised in that：Second eyeglass also includes connection described second and connect Contacting surface and second optical surface and the second inclined-plane mutually abutted with second fork.
10. 10. the camera lens module according to any one of claim 2-9, it is characterised in that：The imaging unit also includes setting At least one 3rd eyeglass in the second eyeglass image side, set between second eyeglass the 3rd eyeglass adjacent thereto There is the anti-dazzling screen.