CN220691233U

CN220691233U - Optical path turning element, imaging lens module and electronic device

Info

Publication number: CN220691233U
Application number: CN202322340196.6U
Authority: CN
Inventors: 范丞纬; 赖炫叡; 程俊嘉; 周明达
Original assignee: Largan Precision Co Ltd
Current assignee: Largan Precision Co Ltd
Priority date: 2022-11-18
Filing date: 2023-08-30
Publication date: 2024-03-29
Anticipated expiration: 2033-08-30
Also published as: TW202422149A; CN118057237A

Abstract

The utility model discloses a light path turning element, which comprises an optical part, a connecting part, a plurality of extinction structures and a shading layer. The optical portion has an optical surface, a first reflecting surface and a second reflecting surface. The light rays are injected into the light path turning element through the optical surface and are reflected once in the light path turning element through the optical surface. The first reflecting surface and the second reflecting surface are respectively used for reflecting the light rays in the light path turning element. The connecting part is provided with a plurality of connecting surfaces for connecting the optical surface, the first reflecting surface and the second reflecting surface. The extinction structure is at least arranged at the connecting part and integrally formed with the connecting part. The single structure of the extinction structure gradually reduces from the surface of the connecting part to the inside of the light path turning element, so that the surface of the connecting part is concave-convex. The shading layer is at least arranged on the surface of the connecting part and used for shading light rays to pass through. The utility model also discloses an imaging lens module with the light path turning element and an electronic device with the imaging lens module.

Description

Optical path turning element, imaging lens module and electronic device

Technical Field

The present utility model relates to a light path turning element, an imaging lens module and an electronic device, and more particularly to a light path turning element and an imaging lens module suitable for an electronic device.

Background

With the technological change, a lens with high optical quality is an essential feature. In addition, the application range of the electronic device equipped with the optical lens is wider, and the requirements for the optical lens are more diversified.

However, in recent years, it has been difficult to meet the demands for miniaturization and high imaging quality of electronic products under the development of multiple types of optical lenses, and particularly, the optical lenses often have arrangements that are easy to generate non-imaging light after miniaturization, resulting in poor optical quality, which cannot meet the demands for increasingly strict optical quality markets at present. Therefore, how to improve the internal components and internal configuration of the optical lens to avoid generating non-imaging light, so as to meet the current requirement of high specification of electronic devices, has become an important issue in the related art.

Disclosure of Invention

In view of the above-mentioned problems, the present utility model discloses an optical path turning element, an imaging lens module and an electronic device, which are beneficial to miniaturization of the imaging lens module and simultaneously have the effect of reducing stray light (non-imaging light), thereby improving the overall optical quality.

The optical path turning element disclosed in an embodiment of the utility model comprises an optical portion, a connecting portion, a plurality of extinction structures and a shading layer. The optical portion has an optical surface, a first reflecting surface and a second reflecting surface. The light rays are injected into the light path turning element through the optical surface, and the light rays are reflected once in the light path turning element through the optical surface. The first reflecting surface is used for reflecting the light ray for another time in the light path turning element. The second reflecting surface is used for reflecting the light ray in the light path turning element for another time. The connecting portion has a plurality of connecting surfaces. The connecting surface is connected with the optical surface, the first reflecting surface and the second reflecting surface. The extinction structure is at least arranged at the connecting part and integrally formed with the connecting part. The single structure of the extinction structure gradually reduces from the surface of the connecting part to the inside of the light path turning element, so that the surface of the connecting part is concave-convex. The shading layer is at least arranged on the surface of the connecting part and used for shading light rays to pass through.

In another embodiment of the present utility model, the optical path turning element includes an optical portion, a connection portion, and a light shielding layer. The optical portion has an optical surface, a first reflecting surface and a second reflecting surface. The light rays are injected into the light path turning element through the optical surface, and the light rays are reflected once in the light path turning element. The first reflecting surface is used for reflecting the light ray for another time in the light path turning element. The second reflecting surface is used for reflecting the light ray in the light path turning element for another time. The connecting portion has a plurality of connecting surfaces. The connecting surface is connected with the optical surface, the first reflecting surface and the second reflecting surface. The shading layer is at least arranged at the connecting part and used for shading light rays to pass through. The shading layer comprises an acrylic monomer and a black dye.

In another embodiment of the present utility model, the optical path turning element includes an optical portion, a connection portion, a plurality of extinction structures, and a light shielding layer. The optical portion has an optical surface, a first reflecting surface and a second reflecting surface. The light rays are injected into the light path turning element through the optical surface. The first reflecting surface is used for making the light ray make primary reflection in the interior of the light path turning element. The second reflecting surface is used for reflecting the light ray for another time in the light path turning element. The connecting part is provided with a plurality of connecting surfaces and at least one material injection trace. The connecting surface is connected with the optical surface, the first reflecting surface and the second reflecting surface. The at least one injection mark is positioned on the at least one connecting surface. The extinction structure is at least arranged on the connecting part and integrally formed with the connecting part, and at least one part of the extinction structure is arranged around the at least one material injection trace of the connecting part. The single structure of the extinction structure gradually reduces from the surface of the connecting part to the inside of the light path turning element, so that the surface of the connecting part is concave-convex. The shading layer is at least arranged on the surface of the connecting part and used for shading light rays to pass through.

In still another embodiment of the present utility model, the optical path turning element comprises a plastic. The light path turning element comprises an optical part, a connecting part and a shading layer. The optical portion has an optical surface, a first reflecting surface and a second reflecting surface. The light rays are injected into the light path turning element through the optical surface. The first reflecting surface is used for making the light ray make primary reflection in the interior of the light path turning element. The second reflecting surface is used for reflecting the light ray for another time in the light path turning element. The connecting part is provided with a plurality of connecting surfaces and a shrinkage cavity structure. The connecting surface is connected with the optical surface, the first reflecting surface and the second reflecting surface. The shrinkage cavity structure is formed by at least part of the connecting surface. The shrinkage cavity structure locally reduces the clear aperture inside the light path turning element. The shading layer is at least arranged on part of the surface of the connecting part and used for shading light rays to pass through. The shading layer comprises an acrylic monomer and a black dye.

In another embodiment of the present utility model, an imaging lens module includes the optical path turning element, a lens assembly, and a photosensitive element. The lens group is arranged adjacent to the light path turning element, and the light passes through the lens group. The photosensitive element is arranged adjacent to the light path turning element and is used for receiving light.

In an embodiment of the utility model, the electronic device includes the imaging lens module.

According to the optical path turning element, the imaging lens module and the electronic device disclosed by the embodiment, the optical path turning element can reflect light for multiple times through the design of the optical part, so that the miniaturized design of the imaging lens module is facilitated; in addition, the light shielding layer is arranged on the connecting part, so that stray light generated by the connecting part can be reduced. Therefore, the imaging lens module can be miniaturized and reduce internal stray light through the arrangement of the light path turning elements, so that the overall optical quality can be improved.

The foregoing description of the utility model and the following description of embodiments are provided to illustrate and explain the principles of the utility model and to provide further explanation of the utility model as claimed.

Drawings

Fig. 1 is a schematic perspective view of an imaging lens module according to a first embodiment of the present utility model.

Fig. 2 is a side cross-sectional view of the imaging lens module of fig. 1 taken along line A-A.

Fig. 3 is a schematic top view of an aperture stop of the imaging lens module of fig. 2.

Fig. 4 is an exploded schematic view of the imaging lens module of fig. 1.

Fig. 5 is a perspective view of an optical path turning element of the imaging lens module of fig. 1.

Fig. 6 is another perspective view of the optical path turning element of fig. 5.

Fig. 7 is a schematic perspective view of the optical path turning element of fig. 5.

Fig. 8 is a schematic perspective view of the optical path turning element of fig. 5 taken along line B-B.

Fig. 9 is a schematic top view of the optical path turning element of fig. 5.

Fig. 10 is an enlarged schematic view of the MM region of fig. 9.

Fig. 11 is a side view of the optical path turning element of fig. 5.

Fig. 12 is a schematic front view of the optical path turning element of fig. 5.

Fig. 13 is a schematic perspective view of an optical path turning element of an imaging lens module according to a second embodiment of the present utility model.

Fig. 14 is an exploded view of the optical path turning element of fig. 13.

Fig. 15 is a perspective view of a light shielding sheet of the light path turning element of fig. 13.

Fig. 16 is a schematic perspective view of an imaging lens module according to a third embodiment of the present utility model.

Fig. 17 is a side cross-sectional view of the imaging lens module of fig. 16 taken along line C-C.

Fig. 18 is an exploded schematic view of the imaging lens module of fig. 16.

Fig. 19 is a perspective view of an optical path turning element of the imaging lens module of fig. 16.

Fig. 20 is a perspective view of the optical path turning element of fig. 19 taken along line D-D.

Fig. 21 is a perspective view of the optical path turning element of fig. 19 taken along line E-E.

Fig. 22 is an enlarged schematic view of the NN area of fig. 21.

Fig. 23 is a schematic top view of the optical path turning element of fig. 19.

Fig. 24 is an enlarged schematic view of the OO area of fig. 23.

Fig. 25 is a side view schematic of the optical path turning element of fig. 19.

Fig. 26 is a schematic front view of the optical path turning element of fig. 19.

Fig. 27 is a schematic perspective view of an optical path turning element of an imaging lens module according to a fourth embodiment of the present utility model.

Fig. 28 is an exploded view of the optical path turning element of fig. 27.

Fig. 29 is a schematic top view of the optical path turning element of fig. 27.

Fig. 30 is a schematic perspective view of an optical path turning element of an imaging lens module according to a fifth embodiment of the utility model.

Fig. 31 is a perspective view of the optical path turning element of fig. 30 taken along line F-F.

Fig. 32 is another perspective view of the optical path turning element of fig. 30.

Fig. 33 is an enlarged schematic view of the PP area of fig. 32.

Fig. 34 is a schematic top view of the optical path turning element of fig. 30.

Fig. 35 is an exploded view of an electronic device according to a sixth embodiment of the present utility model.

[ symbolic description ]

1. 3, 60a, 60b, 60c, 60d, 60e, 60f imaging lens module

11. 31 fixing piece

12. 32 accommodating part

13. 33 lens group

13a aperture stop

13b aperture

14. 34 photosensitive element

100. 200, 300, 400, 500 optical path turning element

110. 210, 310, 410, 510 optical section

111. 211 optical surface

112. 212, 312, 412, 512, a first reflective surface

113. 213, 313, 413, 513, second reflecting surface

311. 411, 511 first optical surface

314. 414, 514 second optical surface

120. 220, 320, 420, 520 connecting part

121. 221, 321, 421, 521, connection surfaces

122. 322, 522 bonding wire

123. 323, 523 material injecting mark

130. 330 extinction structure

140. 240, 340, 440, 540 light shielding layer

150. 350, 450, 550 shrinkage cavity structure

250 shading sheet

551 step difference structure

6 electronic device

MM, NN, OO, PP area

OA optical axis

SS, TT, UU, VV, WW glass block

Detailed Description

The following detailed description of the embodiments is provided to enable any person skilled in the art to make and use the present utility model, and further to enable any person skilled in the art to make and use the present utility model, and to make and use the present utility model, the present utility model will be understood and appreciated by those skilled in the art based on the present disclosure, claims and drawings. The following examples further illustrate the aspects of the utility model in detail, but are not intended to limit the scope of the utility model in any way.

The utility model provides an optical path turning element, which can be made of plastic. The light path turning element comprises an optical part, a connecting part and a shading layer.

The optical portion has an optical surface, a first reflecting surface and a second reflecting surface. The light rays are injected into the light path turning element through the optical surface. The light ray is reflected once inside the light path turning element through the first reflecting surface and reflected another time inside the light path turning element through the second reflecting surface. The first reflecting surface and the second reflecting surface can be provided with reflecting layers so as to achieve the effect of reflecting light rays. The optical surface also makes the light reflected by the light path turning element for another time. The optical surface reflects light by total reflection (total internal reflection), so that the optical surface transmits light and reflects light at the same time. Wherein, the material of the optical part can comprise plastic. Therefore, the design of the light path turning element with various surfaces is facilitated. The reflected light can be emitted from the light path turning element through the optical surface. Therefore, the optical surface can be integrated into a function with an incident surface, an emergent surface and a reflecting surface, which is beneficial to reducing the appearance complexity of the light path turning element. Referring to fig. 2, a side view of an imaging lens module 1 according to a first embodiment of the utility model is shown, wherein light is emitted from the light path turning element 100 along the optical axis OA through the optical surface 111, and functions of the incident surface, the exit surface and the reflection surface are integrated to the optical surface 111.

The optical portion may also have a second optical surface. The second optical surface can integrate multiple functions of light emergent and reflection, and the light can be emitted from the light path turning element through the second optical surface.

The connecting portion has a plurality of connecting surfaces. The connecting surface is connected with the optical surface, the first reflecting surface and the second reflecting surface. Wherein the optical portion may be recessed with respect to the connection portion located therearound. Therefore, the connecting part can be used as a bearing surface during assembly, which is beneficial to controlling the quality of the optical part and avoiding the damage of the optical part. The connecting portion may further have at least one injection trace (gate trace), and the at least one injection trace may be located on at least one connecting surface. The injection mark generated by plastic injection molding is arranged on the connecting part, so that the surface shape quality of the optical surface, the first reflecting surface and the second reflecting surface can be improved, and the influence of the injection mark on the imaging quality can be avoided. Referring to fig. 5 and 19, there are shown the injecting traces 123, 323 of the optical path turning elements 100, 300 according to the first embodiment and the third embodiment of the present utility model, respectively.

The shading layer is at least arranged on part of the surface of the connecting part and used for shading light rays to pass through. The light shielding layer may include an acryl monomer (acryl monomer) and a black dye (black pigment). Therefore, the light shielding layer has better adhesiveness, and the light path turning element with more complex appearance can also have good light shielding performance. Alternatively, the light-shielding layer may contain an organic solvent such as propylene glycol methyl ether acetate (PGMEA, propylene glycol monomethyl ether acetate) and an acryl resin (acrylic resin). Alternatively, the composition of the light-shielding layer may also comprise a photocurable coating. The utility model is not limited thereto. The initial state of the light shielding layer can be fluid, the fluid coating of the light shielding layer is coated on the surface of the connecting part, and then the light source is used for irradiation to solidify the fluid coating of the light shielding layer. The light source may be a light source of ultraviolet light, such as an excimer laser, which can precisely develop the light shielding layer. Wherein, the surface of the connecting part can be roughened to facilitate the arrangement of the shading layer. Wherein, the shading layer can be arranged on the surface of the material injection mark. Therefore, stray light reflected by the material injection trace is avoided.

The light path turning element can reflect light for multiple times through the design of the optical part, so that the miniaturized design of the imaging lens module is facilitated; in addition, the light shielding layer is arranged on the connecting part, so that stray light generated by the connecting part can be reduced. Therefore, the imaging lens module can be miniaturized and reduce internal stray light through the arrangement of the light path turning elements, so that the overall optical quality can be improved.

The light path turning element can also comprise a plurality of extinction structures, and the extinction structures are at least arranged at the connecting part and are integrally formed with the connecting part. The single structure of the extinction structure gradually reduces from the surface of the connecting part to the inside of the light path turning element, so that the surface of the connecting part is concave-convex. By providing the extinction structure on the connection portion, stray light generated by the connection portion is further reduced. Wherein, the extinction structure can be at least partially arranged around the material injection mark. Therefore, stray light generated at the periphery of the material injection mark is reduced.

The connecting portion of the optical path turning element may further have a shrinkage cavity structure. The reduced pore structure may be formed by at least a portion of the joining surface. The shrinkage cavity structure locally reduces the clear aperture inside the light path turning element. The external shape of the shrinkage cavity structure can be reduced towards the inside of the light path turning element, so that the structure for locally reducing the clear aperture in the light path turning element can be achieved, and stray light can be further reduced. The shrinkage cavity structure can be arranged between the first reflecting surface and the second reflecting surface, and the surface of the shrinkage cavity structure is provided with a shading layer. Thereby helping to block stray light between the first reflective surface and the second reflective surface. Wherein, the periphery of the shrinkage cavity structure can be further provided with a step difference structure. The stepped structure may form a protrusion or a depression around the shrinkage cavity structure. Thereby, the setting range of the light shielding layer is facilitated to be controlled.

The light path turning element may further comprise a light shielding sheet. The light shielding sheet may be a sheet-like object having a reduced diameter toward the inside of the light path turning element, and may be provided with a light shielding coating on its surface. Therefore, stray light of the light path turning element can be further reduced.

The recess depth of the single structure of the extinction structure is h, which can satisfy the following conditions: h is more than or equal to 0.02 mm and less than or equal to 1.6 mm. Thereby, reflection of stray light is advantageously reduced.

The connection portion may further have a bonding wire. The bonding wire is arranged between two of the connecting surfaces, an included angle is formed between the connecting surfaces positioned on two sides of the bonding wire, the included angle is theta, and the following conditions can be met: the degree of theta is 130-179 deg. Therefore, the molding quality of the connecting part is improved, and the path of stray light reflected by the connecting surface can be changed.

In the direction perpendicular to the optical surface, the thickness of the optical path turning element is T, and the distance between the bonding wire and the optical surface is d, which satisfies the following condition: d/T is more than or equal to 0.25 and less than or equal to 0.75. By disposing the bonding wires on the connection portion, the bonding wires can be prevented from affecting the surface quality of the optical portion.

The utility model also provides an imaging lens module which comprises the light path turning element, a lens group and a photosensitive element. The lens group and the photosensitive element are arranged adjacent to the light path turning element. The lens group is used for passing light. The photosensitive element is used for receiving light. The lens group is provided with an aperture, and the aperture is elliptical. By means of an elliptical aperture, it is possible to shield unwanted light.

The utility model also provides an electronic device comprising the imaging lens module.

The optical path turning element, the imaging lens module and the electronic device can be combined and configured to achieve the corresponding effects.

In accordance with the above embodiments, specific examples are set forth below in conjunction with the drawings.

< first embodiment >

Referring to fig. 1 to 12, fig. 1 is a schematic perspective view of an imaging lens module according to a first embodiment of the present utility model, fig. 2 is a side sectional view of the imaging lens module of fig. 1 along A-A, fig. 3 is a schematic top view of an aperture stop of the imaging lens module of fig. 2, fig. 4 is an exploded schematic view of the imaging lens module of fig. 1, fig. 5 is a schematic perspective view of an optical path turning element of the imaging lens module of fig. 1, fig. 6 is another schematic perspective view of the optical path turning element of fig. 5, fig. 7 is a schematic perspective view of the optical path turning element of fig. 5, fig. 8 is a schematic perspective view of the optical path turning element of fig. 5 along a-B, fig. 9 is a schematic top view of the optical path turning element of fig. 5, fig. 10 is an enlarged schematic view of an MM region of fig. 9, fig. 11 is a schematic side view of the optical path turning element of fig. 5, and fig. 12 is a schematic front view of the optical path turning element of fig. 5.

The present embodiment provides an imaging lens module 1, which includes a fixing member 11, a receiving member 12, a light path turning element 100, a lens assembly 13 and a photosensitive element 14. The accommodating part 12 is disposed on the fixing part 11 to jointly enclose an accommodating space (not numbered). The optical path turning element 100 is disposed in the accommodating space. The lens assembly 13 is disposed in the accommodating space and located on the object side of the optical path turning element 100 on the optical path, so that the light beam passes through the lens assembly 13 along the optical axis OA and then enters the optical path turning element 100. The lens group 13 has an aperture stop (aperture stop) 13a, and the aperture stop 13a has an elliptical aperture 13b to block excessive light, as shown in fig. 3. Note that the details of the lens assembly 13 are not intended to limit the present utility model, and thus the detailed outline of the lens assembly 13 is not shown in the drawings. The photosensitive element 14 is disposed outside the accommodating space and located at the image side of the optical path turning element 100 on the optical path for receiving the light emitted from the optical path turning element 100.

The material of the optical path turning element 100 may comprise plastic. The optical path turning element 100 includes an optical portion 110, a connecting portion 120, a plurality of extinction structures 130, and a light shielding layer 140.

The optical portion 110 is made of plastic material, and the optical portion 110 has an optical surface 111, a first reflecting surface 112, and a second reflecting surface 113. The optical surface 111 integrates multiple functions of light incidence, light exit and light reflection. The first reflecting surface 112 is provided with a reflecting layer. The second reflecting surface 113 is also provided with a reflecting layer. As shown in fig. 2, after passing through the lens assembly 13 along the optical axis OA, the light enters the optical path turning element 100 through the optical surface 111, is reflected once inside the optical path turning element 100 through the first reflecting surface 112, is reflected another time (total reflection) inside the optical path turning element 100 through the optical surface 111, is reflected another time inside the optical path turning element 100 through the second reflecting surface 113, and finally is emitted from the optical path turning element 100 to the photosensitive element 14 through the optical surface 111.

The connecting portion 120 is made of plastic material. The connection portion 120 is located around the optical portion 110, and the optical portion 110 is recessed with respect to the connection portion 120. The connecting portion 120 has a plurality of connecting surfaces 121, two bonding wires 122, and two molding marks 123. The connection surface 121 connects the optical surface 111, the first reflecting surface 112 and the second reflecting surface 113. Bonding wire 122 is disposed between connection surfaces 121. The molding mark 123 is located on the connection surface 121.

As shown in fig. 11, in the direction perpendicular to the optical surface 111, the thickness of the optical path turning element 100 is T, and the distance between the bonding wire 122 and the optical surface 111 is d, which satisfies the following condition: d=1.46 [ mm ]; t=2.9 [ millimeters ]; and d/t=0.5.

As shown in fig. 12, the connection surfaces 121 on both sides of the bonding wire 122 have an included angle θ, which satisfies the following condition: θ=176 [ degrees ].

The extinction structure 130 is disposed at the connecting portion 120 and integrally formed with the connecting portion 120, and at least a portion of the extinction structure 130 is disposed around the molding mark 123. As shown in fig. 9 and 10, the single structure of the extinction structure 130 tapers from the surface of the connection portion 120 toward the inside of the optical path turning element 100 to form a triangular recess, so that the surface of the connection portion 120 is concave-convex.

As shown in fig. 10, the recess depth of the single structure of the extinction structure 130 is h, which satisfies the following condition: h=0.1 [ mm ].

The light shielding layer 140 is disposed on the surface of the connecting portion 120 and is used for shielding light passing therethrough, and at least a portion of the light shielding layer 140 is disposed on the surface of the molding mark 123. The dot distribution range in fig. 1 to 12 represents the setting range of the light shielding layer 140.

The connecting portion 120 further has a shrinkage cavity 150. The shrinkage cavity structure 150 is disposed between the first reflective surface 112 and the second reflective surface 113. The shrinkage cavity structure 150 may be formed by at least a portion of the connection surface 121. As shown in fig. 8, the shrinkage cavity structure 150 is reduced toward the inside of the optical path turning element 100, and the surface thereof is provided with a light shielding layer 140, so that the clear aperture inside the optical path turning element 100 is locally reduced.

< second embodiment >

Referring to fig. 13 to 15, fig. 13 is a schematic perspective view of an optical path turning element of an imaging lens module according to a second embodiment of the utility model, fig. 14 is an exploded schematic view of the optical path turning element of fig. 13, and fig. 15 is a schematic perspective view of a light shielding sheet of the optical path turning element of fig. 13.

The present embodiment provides an optical path turning element 200, which is similar to the optical path turning element 100 of the previous embodiment, and the optical path turning element 200 can be applied to the imaging lens module 1 of the previous embodiment to replace the optical path turning element 100 of the previous embodiment.

The optical path turning element 200 includes an optical portion 210, a connection portion 220, and a light shielding layer 240, wherein the optical portion 210 and the connection portion 220 are formed by bonding two glass blocks SS, TT, as shown in fig. 14.

The optical portion 210 is made of glass material, and the optical portion 210 has an optical surface 211, a first reflecting surface 212, and a second reflecting surface 213. The optical surface 211 integrates multiple functions of light incidence, light exit and light reflection. The first reflective surface 212 is provided with a reflective layer. The second reflective surface 213 is also provided with a reflective layer. The light enters the light path turning element 200 through the optical surface 211, is reflected once inside the light path turning element 200 through the first reflecting surface 212, is reflected another time inside the light path turning element 200 through the optical surface 211, is reflected another time inside the light path turning element 200 through the second reflecting surface 213, and finally is emitted from the light path turning element 200 through the optical surface 211.

The connection portion 220 is made of glass material. The connection portion 220 is located around the optical portion 210. The connection portion 220 has a plurality of connection surfaces 221. The connection surface 221 connects the optical surface 211, the first reflection surface 212, and the second reflection surface 213.

The light shielding layer 240 is disposed on the surface of the connection portion 220 and is used for shielding light. The dot distribution range in fig. 13 to 15 represents the setting range of the light shielding layer 240.

The connecting portion 220 further comprises a light shielding plate 250. The light shielding sheet 250 is disposed between the first reflecting surface 212 and the second reflecting surface 213. As shown in fig. 14, the light shielding sheet 250 is a sheet-like object having a portion reduced toward the inside of the optical path turning element 200, and has a light shielding layer 240 disposed on a surface thereof and sandwiched between two glass panes SS, TT forming the optical portion 210 and the connection portion 220 to reduce stray light inside the optical path turning element 200.

< third embodiment >

Referring to fig. 16 to 26, fig. 16 is a perspective view of an imaging lens module according to a third embodiment of the present utility model, fig. 17 is a side view of the imaging lens module of fig. 16 along line C-C, fig. 18 is an exploded view of the imaging lens module of fig. 16, fig. 19 is a perspective view of an optical path turning element of the imaging lens module of fig. 16, fig. 20 is a perspective view of the optical path turning element of fig. 19 along line D-D, fig. 21 is a perspective view of the optical path turning element of fig. 19 along line E-E, fig. 22 is an enlarged view of an NN area of fig. 21, fig. 23 is a schematic view of the optical path turning element of fig. 19 from above, fig. 24 is an enlarged view of an OO area of fig. 23, fig. 25 is a schematic view of the optical path turning element of fig. 19, and fig. 26 is a schematic view of the optical path turning element of fig. 19 from front.

The present embodiment provides an imaging lens module 3, which includes a fixing member 31, a receiving member 32, a light path turning element 300, a lens assembly 33 and a photosensitive element 34. The accommodating member 32 is disposed on the fixing member 31 to jointly enclose an accommodating space (not numbered). The optical path turning element 300 is disposed in the accommodating space. The lens assembly 33 is disposed in the accommodating space and located on the object side of the optical path turning element 300 on the optical path, so that the light beam passes through the lens assembly 33 along the optical axis OA and then enters the optical path turning element 300. Note that the details of the lens assembly 33 are not intended to limit the present utility model, and thus the detailed outline of the lens assembly 33 is not shown in the drawings. The photosensitive element 34 is disposed outside the accommodating space and located at the image side of the optical path turning element 300 on the optical path for receiving the light emitted from the optical path turning element 300.

The material of the optical path turning element 300 may comprise plastic. The optical path turning element 300 includes an optical portion 310, a connection portion 320, a plurality of extinction structures 330, and a light shielding layer 340.

The optical portion 310 is made of plastic material, and the optical portion 310 has a first optical surface 311, a first reflecting surface 312, a second reflecting surface 313, and a second optical surface 314. The first optical surface 311 integrates multiple functions of light incidence and reflection. The first reflective surface 312 is provided with a reflective layer. The second reflective surface 313 is also provided with a reflective layer. The second optical surface 314 integrates multiple functions of light exit and reflection. As shown in fig. 17, after passing through the lens assembly 33 along the optical axis OA, the light enters the optical path turning element 300 through the first optical surface 311, is reflected once inside the optical path turning element 300 through the first reflecting surface 312, is reflected once again (total reflection) inside the optical path turning element 300 through the first optical surface 311, is reflected once again (total reflection) inside the optical path turning element 300 through the second optical surface 314, is reflected once again inside the optical path turning element 300 through the second reflecting surface 313, and is emitted from the optical path turning element 300 to the photosensitive element 34 through the second optical surface 314. Note that the second optical surface 314 may reflect light by total reflection as the first optical surface 311, so that the second optical surface 314 may transmit light and reflect light at the same time.

The connecting portion 320 is made of plastic material. The connection portion 320 is located around the optical portion 310, and the optical portion 310 is recessed with respect to the connection portion 320. The connecting portion 320 has a plurality of connecting surfaces 321, two bonding wires 322, and two molding marks 323. The connection surface 321 connects the first optical surface 311, the first reflective surface 312, the second reflective surface 313, and the second optical surface 314. The bonding wires 322 are disposed between the connection faces 321. The molding mark 323 is located on the connecting surface 321.

As shown in fig. 25, in the direction perpendicular to the first optical surface 311, the thickness of the optical path turning element 300 is T, and the distance between the bonding wire 322 and the first optical surface 311 is d, which satisfies the following condition: d=1.565 [ mm ]; t= 2.585[ mm ]; and d/t=0.61.

As shown in fig. 26, the connection surfaces 321 on two sides of the bonding wire 322 have an included angle θ, which satisfies the following conditions: θ=175.8 [ degrees ].

The extinction structure 330 is disposed at the connection portion 320 and integrally formed with the connection portion 320, and at least a portion of the extinction structure 330 is disposed around the molding mark 323. As shown in fig. 23 and 24, the single structure of the extinction structure 330 tapers from the surface of the connection portion 320 toward the inside of the optical path turning element 300 to form a circular arc recess, so that the surface of the connection portion 320 is concave-convex.

As shown in fig. 24, the recess depth of the single structure of the extinction structure 330 is h, which satisfies the following condition: h=0.06 [ mm ].

The light shielding layer 340 is disposed on the surface of the connecting portion 320 and is used for shielding light passing therethrough, and at least a portion of the light shielding layer 340 is disposed on the surface of the molding mark 323. The dot distribution range in fig. 16 to 26 represents the setting range of the light shielding layer 340.

The connecting portion 320 further has a shrinkage cavity 350. The shrinkage cavity 350 is disposed between the first reflective surface 312 and the second reflective surface 313. The shrinkage cavity 350 may be formed by at least a portion of the connecting surface 321. As shown in fig. 20, the shrinkage cavity 350 is reduced toward the inside of the optical path turning element 300, and the surface thereof is provided with a light shielding layer 340, so that the clear aperture inside the optical path turning element 300 is locally reduced. As shown in fig. 21 and 22, the shrinkage cavity 350 has wavy edges, which can help reduce stray light.

< fourth embodiment >

Referring to fig. 27 to 29, fig. 27 is a schematic perspective view of an optical path turning element of an imaging lens module according to a fourth embodiment of the utility model, fig. 28 is an exploded schematic view of the optical path turning element of fig. 27, and fig. 29 is a schematic top view of the optical path turning element of fig. 27.

The present embodiment provides an optical path turning element 400, which is similar to the optical path turning element 300 of the previous embodiment, and the optical path turning element 400 can be applied to the imaging lens module 3 of the previous embodiment instead of the optical path turning element 300 of the previous embodiment.

The optical path turning element 400 includes an optical portion 410, a connection portion 420, and a light shielding layer 440, wherein the optical portion 410 and the connection portion 420 are formed by bonding three glass blocks UU, VV, WW, as shown in fig. 28.

The optical portion 410 is made of glass material, and the optical portion 410 has a first optical surface 411, a first reflecting surface 412, a second reflecting surface 413, and a second optical surface 414. The first optical surface 411 integrates multiple functions of light incidence and reflection. The first reflective surface 412 is provided with a reflective layer. The second reflective surface 413 is also provided with a reflective layer. The second optical surface 414 integrates multiple functions of light exit and reflection. The light enters the light path turning element 400 through the first optical surface 411, is reflected once inside the light path turning element 400 through the first reflecting surface 412, is reflected once again inside the light path turning element 400 through the first optical surface 411, is reflected once again inside the light path turning element 400 through the second optical surface 414, is reflected once again inside the light path turning element 400 through the second reflecting surface 413, and finally is emitted from the light path turning element 400 through the second optical surface 414.

The connection portion 420 is made of glass material. The connection portion 420 is located around the optical portion 410, and the optical portion 410 is recessed with respect to the connection portion 420. The connection portion 420 has a plurality of connection surfaces 421. The connection surface 421 connects the first optical surface 411, the first reflection surface 412, the second reflection surface 413, and the second optical surface 414.

The light shielding layer 440 is disposed on the surface of the connection portion 420 and is used for shielding light. The dot distribution range in fig. 27 to 29 represents the setting range of the light shielding layer 440.

The connecting portion 420 further has a shrinkage cavity 450. The shrinkage cavity 450 is disposed between the first reflective surface 412 and the second reflective surface 413. The shrinkage cavity 450 may be formed by at least a portion of the connecting surface 421. As shown in fig. 28, the optical portion 410 and the connection portion 420 are formed by bonding three glass blocks UU, VV, WW, and the bonding area between the three glass blocks UU, VV, WW is reduced by a processing method such as cutting and polishing, thereby forming a shrinkage cavity structure 450. The shrinkage cavity 450 is reduced toward the inside of the optical path turning element 400, and the surface thereof is provided with a light shielding layer 440, so that the clear aperture inside the optical path turning element 400 is locally reduced.

< fifth embodiment >

Referring to fig. 30 to 34, fig. 30 is a schematic perspective view of an optical path turning element of an imaging lens module according to a fifth embodiment of the utility model, fig. 31 is a schematic perspective view of the optical path turning element of fig. 30 cut along a line F-F, fig. 32 is another schematic perspective view of the optical path turning element of fig. 30, fig. 33 is an enlarged schematic view of a PP region of fig. 32, and fig. 34 is a schematic top view of the optical path turning element of fig. 30.

The present embodiment provides an optical path turning element 500, which is similar to the optical path turning element 300 of the previous embodiment, and the optical path turning element 500 can be applied to the imaging lens module 3 of the previous embodiment instead of the optical path turning element 300 of the previous embodiment.

The material of the optical path turning element 500 may comprise plastic. The optical path turning element 500 includes an optical portion 510, a connection portion 520, and a light shielding layer 540.

The optical portion 510 is made of plastic material, and the optical portion 510 has a first optical surface 511, a first reflecting surface 512, a second reflecting surface 513, and a second optical surface 514. The first optical surface 511 integrates multiple functions of light incidence and reflection. The first reflective surface 512 is provided with a reflective layer. The second reflective surface 513 is also provided with a reflective layer. The second optical surface 514 integrates multiple functions of light exit and reflection. The light enters the light path turning element 500 through the first optical surface 511, is reflected once inside the light path turning element 500 through the first reflecting surface 512, is reflected once again inside the light path turning element 500 through the first optical surface 511, is reflected once again inside the light path turning element 500 through the second optical surface 514, is reflected once again inside the light path turning element 500 through the second reflecting surface 513, and finally is emitted from the light path turning element 500 through the second optical surface 514.

The connecting portion 520 is made of plastic material. The connection portion 520 is located around the optical portion 510, and the optical portion 510 is recessed with respect to the connection portion 520. The connecting portion 520 has a plurality of connecting surfaces 521, two bonding wires 522, and one molding mark 523. The connection surface 521 connects the first optical surface 511, the first reflective surface 512, the second reflective surface 513, and the second optical surface 514. Bonding wires 522 are disposed between the connection faces 521. The filling mark 523 is located on the connection surface 521.

The light shielding layer 540 is disposed on the surface of the connecting portion 520 and is used for shielding light passing therethrough, and at least a portion of the light shielding layer 540 is disposed on the surface of the injecting trace 523. The dot distribution range in fig. 30 to 34 represents the setting range of the light shielding layer 540.

The connecting portion 520 further has a shrinkage cavity 550. The shrinkage cavity 550 is disposed between the first reflective surface 512 and the second reflective surface 513. The reduced bore structure 550 may be formed by at least a portion of the attachment surface 521. As shown in fig. 32 and 33, the shrinkage cavity 550 is reduced toward the inside of the optical path turning element 500, and the surface thereof is provided with a light shielding layer 540, so that the clear aperture inside the optical path turning element 500 is partially reduced. Further, as shown in fig. 33, a stepped structure 551 is further provided around the shrinkage cavity 550. The step-difference structure 551 causes the periphery of the shrinkage cavity structure 550 to form a protrusion like a stopper wall or a recess like a trench. As shown in FIG. 31, the shrinkage cavity 550 has wavy edges, which can help reduce stray light.

< sixth embodiment >

Fig. 35 is an exploded view of an electronic device according to a sixth embodiment of the utility model.

In this embodiment, the electronic device 6 is a smart phone. The electronic device 6 includes an imaging lens module 60a, an imaging lens module 60b, an imaging lens module 60c, an imaging lens module 60d, an imaging lens module 60e, an imaging lens module 60f, a flash module, a focusing auxiliary module, an image signal processor, a display device and an image software processor (not shown). The imaging lens module 60a, the imaging lens module 60b, the imaging lens module 60c, the imaging lens module 60d, the imaging lens module 60e and the imaging lens module 60f are all disposed on the same side of the electronic device 6, and the display device is disposed on the other side of the electronic device 6. The imaging lens module 60f is the imaging lens module 1 of the first embodiment, but the utility model is not limited thereto, and the imaging lens module 60f may be, for example, the imaging lens module of the other embodiments of the utility model.

The imaging lens module 60a is an ultra-wide angle lens module, the imaging lens module 60b is a wide angle primary lens module, the imaging lens module 60c is a tele telescope lens module, the imaging lens module 60d is an ultra-tele telescope lens module, the imaging lens module 60e is an ultra-tele telescope lens module, and the imaging lens module 60f is an ultra-tele telescope lens module. The angle of view of the imaging lens module 60f is, for example, 15 degrees to 38 degrees. The imaging lens modules 60a, 60b, 60c, 60d, 60e and 60f of the present embodiment have different angles of view, so that the electronic device 6 can provide different magnifications to achieve the photographing effect of optical zooming. In addition, the imaging lens module 60d and the imaging lens module 60e are ultra-long focal telescope lenses with reflective element configuration, and are matched with the imaging lens module 60f with the light path turning element 100, so that the thinning of the electronic device 6 is facilitated. The electronic device 6 includes a plurality of imaging lens modules 60a, 60b, 60c, 60d, 60e, 60f, but the number and arrangement of the imaging lens modules are not limited to the present utility model.

When a user shoots a shot object, the electronic device 6 utilizes the imaging lens module 60a, the imaging lens module 60b, the imaging lens module 60c, the imaging lens module 60d, the imaging lens module 60e or the imaging lens module 60f to collect light and take an image, starts the flash module to supplement light, uses the object distance information of the shot object provided by the focusing auxiliary module to perform quick focusing, and adds the image signal processor to perform image optimization processing so as to further improve the image quality generated by the imaging lens module and provide a zooming function. The focusing auxiliary module can adopt an infrared or laser focusing auxiliary system to achieve quick focusing. The display device can adopt a touch screen or a physical shooting button to shoot and process images in cooperation with the diversified functions of the image software processor. The image processed by the image software processor can be displayed on the display device.

It is to be noted that, in fig. 35, the lens cover is separated from the main body only for convenience in illustrating the lens module inside the electronic device 6, and the lens cover is not meant to be detachable, but the utility model is not limited thereto.

The light path turning element and the imaging lens module are not limited to being applied to a smart phone. The optical path turning element and the imaging lens module can be applied to a moving focusing system according to requirements, and have the characteristics of excellent aberration correction and good imaging quality. For example, the optical path turning element and the imaging lens module can be applied to three-dimensional (3D) image capturing, digital cameras, mobile devices, tablet computers, smart televisions, network monitoring equipment, automobile recorders, reversing and developing devices, multi-lens devices, identification systems, motion sensing game machines, wearable devices and other electronic devices in many ways. The foregoing electronic device is merely an exemplary practical example of the present utility model, and is not intended to limit the application scope of the imaging lens module of the present utility model.

Although the present utility model has been described with reference to the above embodiments, it should be understood that the utility model is not limited thereto, but rather, it should be understood that various changes and modifications can be made herein by one skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. An optical path turning element, comprising:

an optical unit comprising:

an optical surface, wherein a light ray is injected into the light path turning element through the optical surface, and the light ray is reflected once in the light path turning element through the optical surface;

the first reflecting surface is used for reflecting the light ray for another time in the light path turning element; and

a second reflecting surface for reflecting the light ray at the inner part of the light path turning element for another time;

a connection part, comprising:

a plurality of connection surfaces connecting the optical surface, the first reflective surface, and the second reflective surface;

the extinction structures are at least arranged on the connecting part and are integrally formed with the connecting part, wherein the single structures of the extinction structures gradually taper and dent from the surface of the connecting part to the inside of the light path turning element, so that the surface of the connecting part is in concave-convex fluctuation; and

And the shading layer is at least arranged on the surface of the connecting part and is used for shading light rays to pass through.

2. The optical path turning element according to claim 1, wherein the light rays are emitted from the optical path turning element through the optical surface.

3. The optical path turning element according to claim 1, wherein the recess depth of the single structure of the extinction structure is h, which satisfies the following condition:

h is more than or equal to 0.02 mm and less than or equal to 1.6 mm.

4. The optical path turning element according to claim 1, wherein the connecting portion further has a shrinkage cavity structure, and the shrinkage cavity structure locally reduces a clear aperture inside the optical path turning element.

5. The optical path turning element according to claim 4, wherein the shrinkage cavity structure is disposed between the first reflecting surface and the second reflecting surface, and the surface of the shrinkage cavity structure is provided with the light shielding layer.

6. The optical path turning element according to claim 1, wherein the connecting portion further has a bonding wire disposed between two of the connecting surfaces, and an included angle is formed between two of the connecting surfaces on both sides of the bonding wire, the included angle being θ, which satisfies the following condition:

And the angle theta is more than or equal to 130 degrees and less than or equal to 179 degrees.

7. The optical path turning element according to claim 6, wherein the optical path turning element has a thickness T in a direction perpendicular to the optical surface, and a distance d between the joining line and the optical surface satisfies the following condition:

0.25≤d/T≤0.75。

8. the optical path turning element according to claim 1, wherein the connecting portion further has at least one gate trace (gate trace), and the at least one gate trace is located on at least one connecting surface.

9. The optical path turning element according to claim 8, wherein the extinction structure is disposed around the at least one injection mark.

10. The optical path turning element according to claim 1, wherein the optical portion is recessed with respect to the connecting portion located therearound.

11. An optical path turning element, comprising:

an optical unit comprising:

an optical surface, wherein a light ray is injected into the light path turning element through the optical surface, and the light ray is reflected once in the light path turning element;

a connection part, comprising:

a plurality of connection surfaces connecting the optical surface, the first reflective surface, and the second reflective surface; and

and the shading layer is at least arranged on the connecting part and is used for shading light rays to pass through.

12. The optical path turning element according to claim 11, further comprising a plurality of extinction structures, wherein the extinction structures are at least disposed on the connection portion and integrally formed with the connection portion, and the single structures of the extinction structures taper from the surface of the connection portion toward the inside of the optical path turning element, so that the surface of the connection portion is concave-convex.

13. The optical path turning element according to claim 12, wherein the recess depth of the single structure of the extinction structure is h, which satisfies the following condition:

h is more than or equal to 0.02 mm and less than or equal to 1.6 mm.

14. The optical path turning element according to claim 11, wherein the light rays are emitted from the optical path turning element through the optical surface.

15. The optical path turning element according to claim 11, wherein the connecting portion further has a shrinkage cavity structure, and the shrinkage cavity structure locally reduces a clear aperture inside the optical path turning element.

16. The optical path turning element according to claim 11, wherein the connecting portion further comprises a bonding wire, the bonding wire is disposed between two of the connecting surfaces, and an included angle is formed between two of the connecting surfaces on both sides of the bonding wire, the included angle is θ, which satisfies the following condition:

17. The optical path turning element according to claim 16, wherein the optical path turning element has a thickness T in a direction perpendicular to the optical surface, and the distance between the joining line and the optical surface is d, which satisfies the following condition:

0.25≤d/T≤0.75。

18. the optical path turning element according to claim 12, wherein the connecting portion further has at least one molding mark, and the at least one molding mark is located on at least one of the connecting surfaces.

19. The optical path turning element according to claim 18, wherein the extinction structure is disposed around the at least one injection mark.

20. An optical path turning element, comprising:

an optical unit comprising:

an optical surface, wherein a light ray is injected into the light path turning element through the optical surface;

The first reflecting surface is used for enabling the light to be reflected once inside the light path turning element; and

the second reflecting surface is used for reflecting the light ray for another time in the light path turning element;

a connection part, comprising:

at least one material injecting trace positioned on at least one connecting surface;

the extinction structures are at least arranged on the connecting part and integrally formed with the connecting part, and at least one part of the extinction structures are arranged around the at least one material injection trace of the connecting part, wherein the single structures of the extinction structures gradually shrink and dent from the surface of the connecting part to the inside of the light path turning element, so that the surface of the connecting part is in concave-convex fluctuation; and

21. The optical path turning element according to claim 20, wherein the optical surface further reflects the light ray at an interior of the optical path turning element and the light ray exits the optical path turning element through the optical surface.

22. The optical path turning element according to claim 20, wherein the surface of the at least one injection mark is provided with the light shielding layer.

23. The optical path turning element according to claim 20, wherein the recess depth of the single structure of the extinction structure is h, which satisfies the following condition:

h is more than or equal to 0.02 mm and less than or equal to 1.6 mm.

24. The optical path turning element according to claim 20, wherein the connecting portion further has a shrinkage cavity structure formed by at least part of the connecting surface, and the shrinkage cavity structure locally reduces the clear aperture inside the optical path turning element.

25. The optical path turning element according to claim 20, wherein the connecting portion further comprises a bonding wire, the bonding wire is disposed between two of the connecting surfaces, and an included angle is formed between two of the connecting surfaces on both sides of the bonding wire, the included angle is θ, which satisfies the following condition:

26. The optical path turning element according to claim 25, wherein the optical path turning element has a thickness T in a direction perpendicular to the optical surface, and the distance between the joining line and the optical surface is d, which satisfies the following condition:

0.25≤d/T≤0.75。

27. An optical path turning element, wherein the material of the optical path turning element comprises plastic, the optical path turning element comprising:

an optical unit comprising:

a connection part, comprising:

the shrinkage cavity structure is formed by at least part of the connecting surfaces, and the shrinkage cavity structure locally reduces the clear aperture inside the light path turning element; and

and the shading layer is at least arranged on part of the surface of the connecting part and is used for shading light rays to pass through.

28. The optical path turning element according to claim 27, wherein said optical surface further reflects said light ray at a still further reflection inside said optical path turning element.

29. The optical path turning element according to claim 28, wherein the light rays emerge from the optical path turning element through a second optical surface different from the optical surface.

30. The optical path turning element according to claim 27, wherein the shrinkage cavity structure is disposed between the first reflecting surface and the second reflecting surface, and the surface of the shrinkage cavity structure is provided with the light shielding layer.

31. The optical path turning element according to claim 30, wherein the periphery of the shrinkage cavity structure is further provided with a step structure, and the step structure makes the periphery of the shrinkage cavity structure convex or concave.

32. The optical path turning element according to claim 27, further comprising a plurality of extinction structures, wherein the extinction structures are at least disposed on the connection portion and integrally formed therewith, and the single structures of the extinction structures taper from the surface of the connection portion toward the inside of the optical path turning element, such that the surface of the connection portion is concave-convex.

33. The optical path turning element according to claim 27, wherein the connecting portion further has at least one molding mark, and the at least one molding mark is located on at least one of the connecting surfaces.

34. The optical path turning element according to claim 27, wherein the connecting portion further comprises a bonding wire, the bonding wire is disposed between two of the connecting surfaces, and an included angle is formed between two of the connecting surfaces on both sides of the bonding wire, the included angle is θ, which satisfies the following condition:

35. The optical path turning element according to claim 34, wherein the optical path turning element has a thickness T in a direction perpendicular to the optical surface, and the distance between the joining line and the optical surface is d, which satisfies the following condition:

0.25≤d/T≤0.75。

36. the optical path turning element according to claim 27, wherein the optical portion is recessed with respect to the connecting portion located therearound.

37. An imaging lens module, comprising:

the optical path turning element according to any one of claims 1, 11, 20 and 27;

a lens group disposed adjacent to the optical path turning element, wherein the light passes through the lens group; and

and the photosensitive element is arranged adjacent to the light path turning element and is used for receiving the light.

38. The imaging lens module as claimed in claim 37, wherein the lens group has an aperture, and the aperture is elliptical.

39. An electronic device comprising the imaging lens module of claim 37.