Imaging lens with fixed elements and electronic device

Abstract

The application discloses an imaging lens using a fixing element and an electronic device. The imaging lens comprises an imaging lens group, a distance maintaining element and a fixing element. The imaging lens group comprises a first lens element and a second lens element. The distance maintaining element is used for maintaining a distance between the first lens element and the second lens element. The distance maintaining element comprises a connecting part and a supporting part. The connecting part is connected with the second lens element. The supporting part is connected with the connecting part and extends from the connecting part to the optical axis of the imaging lens group. The first lens element is arranged on the supporting part. The fixing element is used for fixing the first lens element to the supporting part of the distance maintaining element. The fixing element comprises a fixing surface, and the fixing surface is in abutment with the first lens element. An air layer is arranged between the fixing element and the first lens element, and the air layer is arranged adjacent to the fixing surface. The electronic device has the above imaging lens.

Description

TECHNICAL FIELD

[0001] The present application relates to an imaging lens and an electronic device, in particular, to an imaging lens using a fixing element for an electronic device. BACKGROUND

[0002] With the advancement of semiconductor process technology, the performance of electronic photosensitive elements is improved, and the pixel size can be smaller. Therefore, optical lenses with high imaging quality are indispensable. In addition, with the rapid development of technology, the application range of mobile devices equipped with optical lenses is more extensive, and the requirements for optical lenses are more diverse.

[0003] In recent years, portable electronic devices such as smart electronic devices and tablet computers have become ubiquitous in modern life, and imaging lens modules loaded on portable electronic devices have also developed rapidly. However, as technology continues to advance, users have increasingly high quality requirements for imaging lens modules. Therefore, in addition to improving the quality of optical design, the precision of manufacturing and assembly of imaging lens modules also needs to be improved. The conventional method of fixing the lens by using an adhesive has a defect. Since the position of the adhesive between the lens and the lens barrel can be a narrow gap, the adhesive is usually a thick liquid that needs to be coated in the narrow gap for a long time. After application, the adhesive needs to be cured by a curing device and a curing time, so the production time of the overall optical lens assembly is longer, and the production efficiency is reduced. Another disadvantage is that the adhesive will deteriorate over time, reducing its adhesion, which eventually leads to misalignment of the optical axis of the lens and the optical axis of the lens barrel, reducing the service life of the overall optical lens assembly. Another disadvantage is that the use of adhesive results in low overall strength of the optical lens assembly.

[0004] Therefore, how to improve the optical lens assembly so that the lens can be firmly assembled in the lens barrel, the production efficiency is high, and the overall strength of the optical lens assembly can be increased, and the deterioration of the misalignment of the optical axis after long-term use of the optical lens assembly can be prevented. SUMMARY

[0005] In view of the above-mentioned problems, the present application discloses an imaging lens using a fixing element, which helps to firmly assemble the lens in the lens barrel, has high production efficiency, and can increase the overall strength of the optical lens assembly, and prevent the deterioration of the misalignment of the optical axis after long-term use of the optical lens assembly.

[0006] The present application provides an imaging lens, which comprises an imaging lens group, a distance maintaining element and a fixing element. The imaging lens group comprises a first lens element and a second lens element. The distance maintaining element is used to maintain a distance between the first lens element and the second lens element, wherein the distance maintaining element comprises a connecting part and a supporting part. The connecting part is connected with the second lens element. The supporting part is connected with the connecting part and extends from the connecting part to the optical axis of the imaging lens group, and the first lens element is arranged on the supporting part. The fixing element comprises a fixing surface, and the fixing surface is in abutment with the first lens element to fix the first lens element to the supporting part of the distance maintaining element. An air layer is arranged between the fixing element and the first lens element, and the air layer is arranged adjacent to the fixing surface. The outer diameter of the first lens element is D1, and the outer diameter of the second lens element is D2, which satisfy the following condition: D1 / D2<1.

[0007] The present application also provides an imaging lens, which comprises an imaging lens group, a distance maintaining element and a fixing element. The imaging lens group comprises a first lens element and a second lens element. The distance maintaining element is used to maintain a distance between the first lens element and the second lens element, wherein the distance maintaining element comprises a connecting part and a supporting part. The connecting part is connected with the second lens element. The supporting part is connected with the connecting part and extends from the connecting part to the optical axis of the imaging lens group, and the first lens element is arranged on the supporting part. The fixing element comprises a fixing surface, and the fixing surface is in abutment with the first lens element to fix the first lens element to the supporting part of the distance maintaining element. The fixing element is arranged between the first lens element and the second lens element, and the fixing element is not in physical contact with the second lens element. The outer diameter of the first lens element is D1, and the outer diameter of the second lens element is D2, which satisfy the following condition: D1 / D2<1.

[0008] The present application also provides an imaging lens, which comprises an imaging lens group, a distance maintaining element and a fixing element. The imaging lens group comprises a first lens element, a second lens element and a third lens element. The distance maintaining element is used to arrange the first lens element between the second lens element and the third lens element, and maintain a distance between the first lens element and the second lens element and the third lens element, respectively, wherein the distance maintaining element comprises a connecting part and a supporting part. The connecting part is connected with the second lens element and the third lens element, respectively. The supporting part is connected with the connecting part and extends from the connecting part to the optical axis of the imaging lens group, and the first lens element is arranged on the supporting part. The fixing element comprises a fixing surface, and the fixing surface is in abutment with the first lens element to fix the first lens element to the supporting part of the distance maintaining element. The outer diameter of the first lens element is D1, the outer diameter of the second lens element is D2, and the outer diameter of the third lens element is D3, which satisfy the following conditions: D1 / D2<1 and D1 / D3<1.

[0009] The present application provides an electronic device comprising the aforementioned imaging lens and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging lens.

[0010] According to the disclosed imaging lens using the fixing element, the mechanism configuration can make the glass lens more firmly fixed in the imaging lens, avoid assembly skew, and prevent collision during assembly of the lens elements. In addition, the glass lens can obtain less condition restriction in optical design, thereby achieving higher quality optical specifications.

[0011] In one embodiment, an air layer is disposed between the fixing element and the first lens element, and the air layer is disposed adjacent to the fixing surface. In this way, the design of the air layer can keep the optical surface of the glass lens at a higher surface quality and reduce the probability of internal surface reflection of the lens element.

[0012] In one embodiment, the fixing element is disposed between the first lens element and the second lens element, and the fixing element is not in physical contact with the second lens element. In this way, the assembly of the subsequent lens can be simplified after confirming that the glass lens has been completely fixed, and mechanism interference can be prevented.

[0013] In one embodiment, the distance maintaining element is used to dispose the first lens element between the second lens element and the third lens element, and maintain a distance between the first lens element and the second lens element and the third lens element, respectively. The first lens element is a glass lens element, and the second lens element and the third lens element are both plastic lens elements. In this way, the distance maintaining element can indirectly maintain the coaxiality between the lens elements.

[0014] When D1 / D2 satisfies the above condition, the smaller size of the glass lens helps to reduce the influence of environmental temperature change on optical quality.

[0015] When D1 / D3 satisfies the above condition, the micro glass lens can be installed between the two plastic lenses to reduce the influence of environmental temperature change on optical quality.

[0016] The above description of the present disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principles of the present application, and provide further explanation of the scope of protection of the claims of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A perspective view of an imaging lens according to a first embodiment of the present application is shown.

[0018] Figure 2 A cross-sectional perspective view of the imaging lens of Figure 1 is shown.

[0019] Figure 3 schematic view of the imaging lens of Figure 1 part elements in the imaging lens of

[0020] Figure 4 schematic view of the imaging lens of Figure 3 part elements in the imaging lens of

[0021] Figure 5 schematic view of the imaging lens of Figure 1 part elements in the imaging lens of

[0022] Figure 6 schematic view of the imaging lens of Figure 1 part elements in the imaging lens of

[0023] Figure 7 schematic view of the imaging lens of Figure 1 part elements in the imaging lens of

[0024] Figure 8 schematic view of the imaging lens of Figure 7 part elements in the imaging lens of

[0025] Figure 9 schematic view of the imaging lens of

[0026] Figure 10 schematic view of the imaging lens of Figure 9 part elements in the imaging lens of

[0027] Figure 11 schematic view of the imaging lens of Figure 9 part elements in the imaging lens of

[0028] Figure 12 schematic view of the imaging lens of Figure 9 part elements in the imaging lens of

[0029] Figure 13 schematic view of the imaging lens of Figure 12 part elements in the imaging lens of

[0030] Figure 14 schematic view of the imaging lens of Figure 9 part elements in the imaging lens of

[0031] Figure 15 schematic view of the imaging lens of Figure 14 part elements in the imaging lens of

[0032] Figure 16 schematic view of the imaging lens of

[0033] Figure 17 schematic view of the imaging lens ofFigure 16 A magnified view of a portion of region E.

[0034] Figure 18 Draw Figure 16 A three-dimensional schematic diagram of the fixing element.

[0035] Figure 19 A perspective view of an imaging lens according to a fourth embodiment of the present invention is shown.

[0036] Figure 20 Draw Figure 19 A cross-sectional three-dimensional schematic diagram of the imaging lens.

[0037] Figure 21 Draw Figure 19 An exploded view of the imaging lens.

[0038] Figure 22 Draw Figure 21 A magnified view of a portion of region F.

[0039] Figure 23 Draw Figure 19 A breakdown diagram of the other side of the imaging lens.

[0040] Figure 24 Draw Figure 19 A cross-sectional schematic diagram of the imaging lens.

[0041] Figure 25 Draw Figure 24 A magnified schematic diagram of a portion of region G.

[0042] Figure 26 A perspective schematic diagram of an imaging device according to a fifth embodiment of the present invention is shown.

[0043] Figure 27 A schematic diagram of another imaging device according to the present invention is shown.

[0044] Figure 28 A schematic diagram illustrating yet another imaging device according to the present invention.

[0045] Figure 29 A perspective view of one side of an electronic device according to a sixth embodiment of the present invention is shown.

[0046] Figure 30 Draw Figure 29 A three-dimensional diagram of the other side of the electronic device.

[0047] Figure 31 Draw Figure 29 System block diagram of an electronic device.

[0048] Figure 32Fig. 2 shows a schematic view of another electronic device according to the present application.

[0049]

Symbolic Description

[0050] 1, 1b, 1c, 1d... imaging lens

[0051] 10, 10b, 10c, 10d... imaging lens group

[0052] 110, 110b, 110c, 110d... first lens element

[0053] 120, 120b, 120c, 120d... second lens element

[0054] 130, 130b... third lens element

[0055] 101, 101b, 101d... light shield

[0056] 20, 20b, 20c, 20d... distance maintaining element

[0057] 210, 210b, 210c, 210d... connecting portion

[0058] 211, 211b, 211d... axial connecting structure

[0059] 2111, 2111b, 2111d... ring inclined surface

[0060] 2112, 2112b, 2112d... ring flat surface

[0061] 220, 220b, 220c, 220d... supporting portion

[0062] 30, 30b, 30c, 30d... fixing element

[0063] 310, 310b, 310c, 310d... fixing surface

[0064] 320b, 320d... wedge structure

[0065] 40, 40b, 40c... strip structure

[0066] 60, 60a... electronic device

[0067] 61... flash module

[0068] 62... focus assisting module

[0069] 63... image signal processor

[0070] 64... display device

[0071] 65…image software processor;

[0072] 66…subject;

[0073] 70, 70a, 70b…image capturing device;

[0074] 72…driving device;

[0075] 73…electronic photosensitive element;

[0076] 74…image stabilization module;

[0077] 76…extended image signal processor;

[0078] D1…outer diameter of the first lens element;

[0079] D2…outer diameter of the second lens element;

[0080] D3…outer diameter of the third lens element;

[0081] Φr…outer diameter of the fixing element;

[0082] OA…optical axis;

[0083] AGL…air gap. DETAILED DESCRIPTION

[0084] The detailed features and advantages of the present application are described in the following embodiments in detail, which are sufficient to enable any person skilled in the relevant art to understand the technical content of the present application and to implement it, and according to the content disclosed in the present specification, the scope of the patent application and the drawings, any person skilled in the art can easily understand the related purposes and advantages of the present application. The following examples further illustrate the ideas of the present application, but do not limit the scope of the present application in any way.

[0085] The present application provides an imaging lens, which comprises an imaging lens group, a distance maintaining element and a fixing element. The imaging lens group comprises a first lens element and a second lens element, wherein the first lens element can be a glass lens element, and the second lens element can be a plastic lens element.

[0086] The distance maintaining element is used to maintain a distance between the first lens element and the second lens element, wherein the distance maintaining element comprises a connecting part and a supporting part, the connecting part is connected with the second lens element, the supporting part is connected with the connecting part and extends from the connecting part to the optical axis of the imaging lens group, and the first lens element is arranged on the supporting part. The second lens element is connected with the distance maintaining element in a leaning manner, for example. The distance maintaining element can have the functions of a lens barrel and a spacer ring, but the present application is not limited thereto.

[0087] The fixing element comprises a fixing surface. The fixing surface is in contact with the first lens element to fix the first lens element to the support portion of the distance maintaining element. The imaging lens disclosed in the present application can be provided with one or more fixing elements according to different assembly requirements, and therefore the present application is not limited by the number of fixing elements.

[0088] The outer diameter of the first lens element is D1, and the outer diameter of the second lens element is D2, which satisfy the condition of D1 / D2<1. In this way, the small-sized glass lens helps to reduce the influence of environmental temperature change on optical quality. Please refer to Figure 7 is a schematic diagram illustrating parameters D1 and D2 according to the first embodiment of the present application.

[0089] The imaging lens using the fixing element disclosed in the present application has a mechanism configuration that can firmly fix the glass lens in the imaging lens, avoid assembly skew, prevent collision between lens elements during assembly, and obtain less condition limitation in optical design of the glass lens, thereby achieving high-quality optical specifications.

[0090] An air layer can be provided between the fixing element and the first lens element, and the air layer is provided adjacent to the fixing surface. In this way, the design of the air layer can keep the optical surface of the glass lens at a high surface quality and reduce the probability of internal surface reflection of the lens element.

[0091] The fixing element can be provided between the first lens element and the second lens element, and the fixing element and the second lens element can not be in physical contact. In this way, the assembly of the subsequent lens can be performed after confirming that the glass lens has been completely fixed, thereby simplifying the assembly process and preventing mechanism interference.

[0092] The imaging lens group can further comprise a third lens element, and the third lens element can be a plastic lens element. The distance maintaining element can be used to arrange the first lens element between the second lens element and the third lens element, and maintain a distance between the first lens element and the second lens element and the third lens element. In this way, the configuration of arranging the glass lens element between two plastic lens elements can reduce the influence of temperature effect (environmental temperature change) on optical quality. In addition, the connecting portion of the distance maintaining element can be connected to the second lens element and the third lens element, respectively. The second lens element and the third lens element are connected to the two sides of the distance maintaining element, respectively, for example, in a contact manner.

[0093] The outer diameter of the first lens element is D1, and the outer diameter of the third lens element is D3, which can satisfy the condition of D1 / D3<1. In this way, the micro glass lens can be arranged between the plastic lenses to reduce the influence of environmental temperature change on optical quality. Please refer to Figure 7Fig. 1 is a schematic diagram illustrating parameters D1 and D3 according to a first embodiment of the present application.

[0094] The fixing element can not be in physical contact with the second lens element and the third lens element. In this way, the glass lens can be completely fixed before the assembly of the subsequent lens elements, thereby simplifying the assembly process and preventing mechanism interference.

[0095] The fixing surface can be a spherical surface or a conical surface, and the fixing surface can be in physical contact with a curved surface of the first lens element. In this way, the fixing element and the surface of the glass lens can be effectively matched to provide a fast and stable assembly method. The fixing surface and the curved surface of the first lens element can be in surface contact or in line contact. For example, when the curved surface of the first lens element is a spherical surface and the fixing surface of the fixing element is a conical surface, the curved surface of the first lens element can correspond to the fixing surface of the fixing element and form a complete circle of line contact; when the curved surface of the first lens element is a spherical surface and the fixing surface of the fixing element is a spherical surface, the curved surface of the first lens element can correspond to the fixing surface of the fixing element and form a complete circle of surface contact; the curved surface of the first lens element can extend outward from the optically effective surface of the first lens element.

[0096] The fixing element can be provided with a plurality of wedge-shaped structures, and the wedge-shaped structures taper towards the air gap and are arranged around the optical axis. In this way, the efficiency of removing stray light can be improved.

[0097] A plurality of strip-shaped structures can be arranged between the distance maintaining element and the fixing element, and the strip-shaped structures extend along the direction parallel to the optical axis and are arranged around the optical axis. In this way, the assembly strength of the fixing element can be improved to prevent the elements from falling off. The strip-shaped structures can be arranged on the distance maintaining element or the fixing element, but the present application is not limited thereto.

[0098] The connecting portion of the distance maintaining element can have an axial connecting structure, and the axial connecting structure connects the second lens element. The axial connecting structure includes a ring inclined surface and a ring flat surface, the ring inclined surface is used to coaxially align the first lens element and the second lens element, and the ring flat surface is used to maintain the distance between the first lens element and the second lens element. In this way, the distance maintaining element can indirectly maintain the coaxiality between the lens elements through the axial connecting structure of the connecting portion; in addition, the axial connecting structure can also prevent the lens elements from being skewed.

[0099] An optical shield can be arranged between the first lens element and the second lens element, and the optical shield is closer to the optical axis than the axial connecting structure. In this way, more stray light that can come from the axial connecting structure can be shielded.

[0100] The outer diameter of the fixing element is Φr, and the outer diameter of the second lens element is D2, which can satisfy the following condition: Φr / D2<1. In this way, it is helpful to provide the feasibility of micro-lens assembly. Please refer to Figure 7 is a schematic diagram illustrating parameters Φr and D2 according to the first embodiment of the present application.

[0101] The distance maintaining element can be integrally formed by injection molding, and the distance maintaining element can have at least two injection marks. In this way, a distance maintaining element with a more complex structure and higher dimensional accuracy can be provided.

[0102] The number of lens elements of the imaging lens group is N, which can satisfy the following condition: 3≤N≤10. In this way, an imaging lens with high resolution can be provided.

[0103] The first lens element can have positive refractive power. In this way, the back focus quality can be kept within a smaller tolerance range to improve the quality and yield of product mass production.

[0104] The present application provides an electronic device comprising the aforementioned imaging lens and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging lens. The imaging lens disclosed by the present application can be applied to virtual reality or augmented reality, but the present application is not limited thereto.

[0105] The technical features of the imaging lens using the fixing element of the present application described above can be combined and configured to achieve the corresponding effects.

[0106] According to the above-mentioned embodiments, the following specific embodiments are proposed in detail with reference to the accompanying drawings.

[0107] <First Embodiment>

[0108] Please refer to Figures 1 to 8 , wherein Figure 1 illustrates a perspective view of the imaging lens according to the first embodiment of the present application, Figure 2 illustrates Figure 1 a cross-sectional perspective view of the imaging lens, Figure 3 illustrates Figure 1 a cross-sectional perspective view of part of the elements of the imaging lens, Figure 4 illustrates Figure 3 a local enlarged view of the A area, Figure 5 illustrates Figure 1 an exploded view of part of the elements of the imaging lens, Figure 6 illustrates Figure 1 another side exploded view of part of the elements of the imaging lens, Figure 7 illustrates Figure 1 a cross-sectional view of the imaging lens, and Figure 8 illustrates Figure 7 a local enlarged view of the B area.

[0109] In the present embodiment, the imaging lens 1 comprises an imaging lens group 10, a distance maintaining element 20, and a fixing element 30. The imaging lens group 10 comprises a first lens element 110, a second lens element 120, a third lens element 130, and a light shield 101 arranged along an optical axis OA. The first lens element 110 is arranged between the second lens element 120 and the third lens element 130, and the light shield 101 is arranged between the first lens element 110 and the second lens element 120. The first lens element 110 has positive refractive power, and the first lens element 110 is a glass lens element. The second lens element 120 is a plastic lens element, and the third lens element 130 is a plastic lens element.

[0110] The distance maintaining element 20 is integrally formed by injection molding and has at least two injection marks. The distance maintaining element 20 is used to arrange the first lens element 110 between the second lens element 120 and the third lens element 130, and to maintain a distance between the first lens element 110 and the second lens element 120 and the third lens element 130, respectively. The distance maintaining element 20 comprises a connecting portion 210 and a supporting portion 220. The connecting portion 210 is connected to the second lens element 120 and the third lens element 130, respectively, wherein the second lens element 120 and the third lens element 130 are connected to the distance maintaining element 20 by abutting, respectively. The supporting portion 220 is connected to the connecting portion 210 and extends from the connecting portion 210 toward the optical axis OA, wherein the first lens element 110 is arranged on the supporting portion 220. In the present embodiment, the distance maintaining element 20 has the function of a spacer ring, and can maintain the distance between the second lens element 120 and the third lens element 130.

[0111] The connecting portion 210 has an axial connecting structure 211, and the axial connecting structure 211 is connected to the second lens element 120. The axial connecting structure 211 comprises a ring inclined surface 2111 and a ring flat surface 2112, wherein the ring inclined surface 2111 is used to coaxially align the first lens element 110 and the second lens element 120, and the ring flat surface 2112 is used to maintain the distance between the first lens element 110 and the second lens element 120. In the present embodiment, the light shield 101 is closer to the optical axis OA than the axial connecting structure 211.

[0112] A fixing element 30 is disposed between the first lens element 110 and the second lens element 120. The fixing element 30 is used to fix the first lens element 110 to the support portion 220 of the distance holding element 20, and the fixing element 30 has no physical contact with the second lens element 120 and the third lens element 130. The fixing element 30 includes a fixing surface 310, and the fixing surface 310 abuts against the first lens element 110. An air gap AGL is disposed between the fixing element 30 and the first lens element 110, and the air gap AGL is disposed adjacent to the fixing surface 310. In this embodiment, the fixing surface 310 is a conical surface, and the fixing surface 310 has physical contact with a curved surface of the first lens element 110, which can be a surface contact or a line contact.

[0113] A plurality of strip structures 40 are provided between the distance holding element 20 and the fixing element 30, and the strip structures 40 extend along the direction parallel to the optical axis OA and are arranged around the optical axis OA. In this embodiment, the strip structures 40 are provided on the distance holding element 20 and are located between the distance holding element 20 and the fixing element 30.

[0114] The outer diameter of the first lens element 110 is D1, and the outer diameter of the second lens element 120 is D2, which satisfy the following conditions: D1 = 3.1 mm; D2 = 6 mm; and D1 / D2 = 0.517.

[0115] The outer diameter of the first lens element 110 is D1, and the outer diameter of the third lens element 130 is D3, which satisfy the following conditions: D1 = 3.1 mm; D3 = 5.8 mm; and D1 / D3 = 0.534.

[0116] The imaging lens group 10 has N lens elements, which satisfy the following condition: N = 6.

[0117] The outer diameter of the fixed element 30 is Φr, and the outer diameter of the second lens element 120 is D2, which satisfy the following conditions: Φr = 3.6 mm; D2 = 6 mm; and Φr / D2 = 0.600.

[0118] <Second Embodiment>

[0119] Please refer to Figures 9 to 15 ,in Figure 9 A perspective view of an imaging lens according to a second embodiment of the present invention is shown. Figure 10 Draw Figure 9 A cross-sectional three-dimensional diagram of an imaging lens. Figure 11 Draw Figure 9 An exploded view of some components in the imaging lens. Figure 12 Draw Figure 9 An exploded view of the other side of some components in an imaging lens.Figure 13 a partial enlarged view of a C region of the imaging lens, Figure 12 a partial enlarged view of a C region of the imaging lens, Figure 14 a partial enlarged view of a C region of the imaging lens, Figure 9 a partial enlarged view of a C region of the imaging lens, and Figure 15 a partial enlarged view of a C region of the imaging lens. Figure 14 a partial enlarged view of a C region of the imaging lens.

[0120] In this embodiment, the imaging lens 1b comprises an imaging lens group 10b, a distance maintaining element 20b and a fixing element 30b.

[0121] The imaging lens group 10b comprises a first lens element 110b, a second lens element 120b, a third lens element 130b and a light shield 101b arranged along an optical axis OA of the imaging lens group 10b. The first lens element 110b is arranged between the second lens element 120b and the third lens element 130b, and the light shield 101b is arranged between the first lens element 110b and the second lens element 120b. The first lens element 110b has positive refractive power, and the first lens element 110b is a glass lens element. The second lens element 120b is a plastic lens element, and the third lens element 130b is a plastic lens element.

[0122] The distance maintaining element 20b is integrally formed by injection molding and has at least two injection marks. The distance maintaining element 20b is used to arrange the first lens element 110b between the second lens element 120b and the third lens element 130b, and to maintain a distance between the first lens element 110b and the second lens element 120b and the third lens element 130b, respectively. The distance maintaining element 20b comprises a connecting portion 210b and a supporting portion 220b. The connecting portion 210b is connected to the second lens element 120b and the third lens element 130b, respectively, and the second lens element 120b and the third lens element 130b are connected to the distance maintaining element 20b by abutting, respectively. The supporting portion 220b is connected to the connecting portion 210b and extends from the connecting portion 210b to the direction of the optical axis OA, and the first lens element 110b is arranged on the supporting portion 220b. In this embodiment, the distance maintaining element 20b has the functions of a lens barrel and a spacer ring, and can be used to accommodate the imaging lens group 10b and maintain the distance between the second lens element 120b and the third lens element 130b.

[0123] The connecting portion 210b has an axial connecting structure 211b, and the axial connecting structure 211b connects the second lens element 120b. The axial connecting structure 211b includes a ring bevel 2111b and a ring flat 2112b. The ring bevel 2111b is used to coaxially align the first lens element 110b and the second lens element 120b, and the ring flat 2112b is used to maintain the distance between the first lens element 110b and the second lens element 120b. In this embodiment, the light shield 101b is closer to the optical axis OA than the axial connecting structure 211b.

[0124] The fixing element 30b is disposed between the first lens element 110b and the second lens element 120b, and is used to fix the first lens element 110b to the support portion 220b of the distance maintaining element 20b. The fixing element 30b does not have physical contact with the second lens element 120b and the third lens element 130b. The fixing element 30b includes a fixing surface 310b, and the fixing surface 310b and the first lens element 110b abut each other. An air gap AGL is disposed between the fixing element 30b and the first lens element 110b, and the air gap AGL is adjacent to the fixing surface 310b. In this embodiment, the fixing surface 310b is a spherical surface, and the fixing surface 310b has physical contact with a curved surface of the first lens element 110b in a surface contact manner or a line contact manner.

[0125] In this embodiment, the fixing element 30b is provided with a plurality of wedge-shaped structures 320b, and the wedge-shaped structures 320b taper towards the air gap AGL and are arranged around the optical axis OA.

[0126] A plurality of strip-shaped structures 40b are disposed between the distance maintaining element 20b and the fixing element 30b, and the strip-shaped structures 40b extend along the direction parallel to the optical axis OA and are arranged around the optical axis OA. In this embodiment, the strip-shaped structures 40b are disposed on the distance maintaining element 20b, and the strip-shaped structures 40b are located between the distance maintaining element 20b and the fixing element 30b.

[0127] The outer diameter of the first lens element 110b is D1, and the outer diameter of the second lens element 120b is D2, which satisfy the following conditions: D1 = 3.1 mm; D2 = 6 mm; and D1 / D2 = 0.517.

[0128] The outer diameter of the first lens element 110b is D1, and the outer diameter of the third lens element 130b is D3, which satisfy the following conditions: D1 = 3.1 mm; D3 = 5.6 mm; and D1 / D3 = 0.554.

[0129] The number of lens elements of the imaging lens group 10b is N, which satisfies the following condition: N = 6.

[0130] The outer diameter of the fixing element 30b is Φr, and the outer diameter of the second lens element 120b is D2, which satisfy the following conditions: Φr = 3.6 mm; D2 = 6 mm; and Φr / D2 = 0.600.

[0131] <Third Embodiment>

[0132] Please refer to Figures 16 to 18 wherein Figure 16 a cross-sectional schematic view of an imaging lens according to a third embodiment of the present application is shown, Figure 17 a partial enlarged schematic view of an E region of Figure 16 is shown, and Figure 18 a perspective schematic view of a fixing element of Figure 16 is shown.

[0133] In this embodiment, the imaging lens 1c comprises an imaging lens group 10c, a distance maintaining element 20c, and a fixing element 30c.

[0134] The imaging lens group 10c comprises a first lens element 110c and a second lens element 120c arranged along an optical axis OA of the imaging lens group 10c, and the first lens element 110c and the second lens element 120c are arranged adjacently. The first lens element 110c has positive refractive power, and the first lens element 110c is a glass lens element. The second lens element 120c is a plastic lens element.

[0135] The distance maintaining element 20c is integrally formed by injection molding and has at least two injection marks. The distance maintaining element 20c is used to maintain a distance between the first lens element 110c and the second lens element 120c. The distance maintaining element 20c comprises a connecting portion 210c and a supporting portion 220c. The connecting portion 210c is connected to the second lens element 120c, and the second lens element 120c is connected to the distance maintaining element 20c in a clamping manner. The supporting portion 220c is connected to the connecting portion 210c and extends from the connecting portion 210c toward the optical axis OA, and the first lens element 110c is arranged on the supporting portion 220c. In this embodiment, the distance maintaining element 20c has the function of a lens barrel and can be used to accommodate the imaging lens group 10c.

[0136] The fixing element 30c is disposed between the first lens element 110c and the second lens element 120c, and is used to fix the first lens element 110c to the support portion 220c of the distance keeping element 20c, and the fixing element 30c has no physical contact with the second lens element 120c. The fixing element 30c comprises a fixing surface 310c, and the fixing surface 310c and the first lens element 110c abut against each other, wherein an air gap AGL is disposed between the fixing element 30c and the first lens element 110c, and the air gap AGL is disposed adjacent to the fixing surface 310c. In the embodiment, the fixing surface 310c is a spherical surface, and the fixing surface 310c has physical contact with a curved surface of the first lens element 110c, which can be in the form of surface contact or line contact.

[0137] A plurality of strip structures 40c are disposed between the distance keeping element 20c and the fixing element 30c, and the strip structures 40c extend along the direction of the optical axis OA and are arranged around the optical axis OA. In the embodiment, the strip structures 40c are disposed on the fixing element 30c, and the strip structures 40c are located between the distance keeping element 20c and the fixing element 30c.

[0138] The outer diameter of the first lens element 110c is D1, and the outer diameter of the second lens element 120c is D2, which satisfy the following conditions: D1 = 6.9 mm; D2 = 7.6 mm; and D1 / D2 = 0.908.

[0139] The number of lens elements of the imaging lens 10c is N, which satisfy the following condition: N = 4.

[0140] The outer diameter of the fixing element 30c is Φr, and the outer diameter of the second lens element 120c is D2, which satisfy the following conditions: Φr = 7 mm; D2 = 7.6 mm; and Φr / D2 = 0.921.

[0141] <Fourth Embodiment>

[0142] Please refer to Figures 19 to 25 , wherein Figure 19 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, Figure 20 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, Figure 19 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, Figure 21 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, Figure 19 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, Figure 22 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, Figure 21 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, Figure 23 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, Figure 19 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, Figure 24 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, Figure 19 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown, and Figure 25 a perspective view of an imaging lens according to a fourth embodiment of the present application is shown,Figure 24 A partial enlarged view of the G region of FIG. 1.

[0143] In the present embodiment, the imaging lens 1d comprises an imaging lens group 10d, a distance maintaining element 20d and a fixing element 30d.

[0144] The imaging lens group 10d comprises a first lens element 110d, a second lens element 120d and a light shield 101d arranged along an optical axis OA of the imaging lens group 10d. The first lens element 110d and the second lens element 120d are arranged adjacently, and the light shield 101d is arranged between the first lens element 110d and the second lens element 120d. The first lens element 110d has positive refractive power, and the first lens element 110d is a glass lens element. The second lens element 120d is a plastic lens element.

[0145] The distance maintaining element 20d is integrally formed by injection molding and has at least two injection marks. The distance maintaining element 20d is used to maintain a distance between the first lens element 110d and the second lens element 120d. The distance maintaining element 20d comprises a connecting portion 210d and a supporting portion 220d. The connecting portion 210d is connected with the second lens element 120d, and the second lens element 120d is connected with the distance maintaining element 20d in a clamping manner. The supporting portion 220d is connected with the connecting portion 210d and extends from the connecting portion 210d toward the optical axis OA, and the first lens element 110d is arranged on the supporting portion 220d. In the present embodiment, the distance maintaining element 20d has the function of a lens barrel and can be used to accommodate the imaging lens group 10d.

[0146] The connecting portion 210d has an axial connecting structure 211d, and the axial connecting structure 211d is connected with the second lens element 120d. The axial connecting structure 211d comprises a ring inclined surface 2111d and a ring flat surface 2112d. The ring inclined surface 2111d is used to coaxially align the first lens element 110d and the second lens element 120d, and the ring flat surface 2112d is used to maintain the distance between the first lens element 110d and the second lens element 120d. In the present embodiment, the light shield 101d is closer to the optical axis OA than the axial connecting structure 211d.

[0147] The fixing element 30d is disposed between the first lens element 110d and the second lens element 120d, and is used to fix the first lens element 110d to the support portion 220d of the distance maintaining element 20d, and the fixing element 30d has no physical contact with the second lens element 120d. The fixing element 30d comprises a fixing surface 310d, and the fixing surface 310d and the first lens element 110d abut against each other, wherein an air gap AGL is disposed between the fixing element 30d and the first lens element 110d, and the air gap AGL is disposed adjacent to the fixing surface 310d. In the embodiment, the fixing surface 310d is a spherical surface, and the fixing surface 310d has physical contact with a curved surface of the first lens element 110d, which can abut against each other in a surface contact manner or a line contact manner.

[0148] In the embodiment, the fixing element 30d is provided with a plurality of wedge-shaped structures 320d, and the wedge-shaped structures 320d taper towards the direction of the air gap AGL and are arranged around the optical axis OA.

[0149] The outer diameter of the first lens element 110d is D1, and the outer diameter of the second lens element 120d is D2, which satisfy the following conditions: D1 = 8.3 mm; D2 = 9.615 mm; and D1 / D2 = 0.863.

[0150] The number of lens elements of the imaging lens group 10d is N, which satisfies the following condition: N = 3.

[0151] The outer diameter of the fixing element 30d is Φr, and the outer diameter of the second lens element 120d is D2, which satisfy the following conditions: Φr = 8.45 mm; D2 = 9.615 mm; and Φr / D2 = 0.879.

[0152] <the fifth embodiment>

[0153] Please refer to Figure 26 is a perspective view illustrating an image capturing device according to the fifth embodiment of the present application. In the embodiment, the image capturing device 70 is a camera module. The image capturing device 70 comprises the imaging lens 1 of the first embodiment, a driving device 72, an electronic photosensitive element 73, and an image stabilization module 74. However, in other aspects, the image capturing device 70 can also be, for example, an imaging lens comprising the imaging lens of the second embodiment, the third embodiment, or the fourth embodiment, and the present application is not limited thereto. The image capturing device 70 uses the imaging lens group 10 of the imaging lens 1 to generate an image, and cooperates with the driving device 72 to focus the image on the imaging surface of the imaging lens 1, and finally forms an image on the electronic photosensitive element 73 and can be output as image data.

[0154] The driving device 72 can have an Auto-Focus function, and the driving mode thereof can use a driving system such as a Voice Coil Motor (VCM), a Micro Electro-Mechanical Systems (MEMS), a Piezoelectric system, and a Shape Memory Alloy. The driving device 72 can allow the imaging lens 1 to obtain a better imaging position, and can provide a clear image of the subject in different object distances. In addition, the image capturing device 70 can be equipped with an electronic photosensitive element 73 (such as a CMOS or a CCD) with good photosensitivity and low noise arranged on the imaging surface, and can truly present the good imaging quality of the imaging lens 1.

[0155] The image stabilization module 74 is, for example, an accelerometer, a gyroscope, or a Hall Effect Sensor. The driving device 72 can be combined with the image stabilization module 74 to serve as an Optical Image Stabilization (OIS) device, which can adjust the changes of the imaging lens 1 in different axial directions to compensate for the blurred image caused by shaking during shooting, or use an image compensation technology in the image software to provide an Electronic Image Stabilization (EIS) function, thereby further improving the imaging quality in dynamic and low-illumination scenes.

[0156] The image capturing device of the present application is not limited to the above structure. Figure 27 A schematic diagram of another image capturing device according to the present application is shown, wherein the image capturing device 70 further comprises a flash module 61. The flash module 61 can provide light compensation during shooting to improve the imaging quality.

[0157] Figure 28 A schematic diagram of another image capturing device according to the present application is shown, wherein the image capturing device 70 further comprises a focus assisting module 62. The focus assisting module 62 can provide the object distance information of the subject to facilitate fast focusing. The focus assisting module 62 can use an infrared or laser focus assisting system to achieve fast focusing.

[0158] <Sixth Embodiment>

[0159] Please refer to Figures 29 to 31 , wherein Figure 29 A perspective schematic diagram of an electronic device according to the sixth embodiment of the present application is shown, Figure 30 A perspective schematic diagram of the other side of the electronic device of Figure 29 is shown, Figure 31 A system block diagram of the electronic device of Figure 29 is shown.

[0160] In this embodiment, the electronic device 60 is a smartphone. The electronic device 60 comprises the image capturing device 70 of the fifth embodiment, an image signal processor 63, a display device (user interface) 64, and an image software processor 65. In this embodiment, the image capturing device 70 comprises the imaging lens 1, a driving device 72, an electronic photosensitive element 73, an image stabilization module 74, a flash module 61, and a focus assist module 62.

[0161] When a user captures an object 66, the electronic device 60 uses the image capturing device 70 to capture the object 66 in a spotlight mode, activates the flash module 61 to provide supplementary light, and uses the distance information of the object 66 provided by the focus assist module 62 to perform fast focusing, in addition to the image optimization processing performed by the image signal processor 63, to further improve the image quality of the image produced by the imaging lens 1. The focus assist module 62 can use an infrared or laser focus assist system to achieve fast focusing. The display device 64 can use a touch screen or a physical shutter button, in combination with the diversified functions of the image software processor 65, to perform image capturing and image processing. The image processed by the image software processor 65 can be displayed on the display device 64.

[0162] The electronic device of the present application is not limited to the number of image capturing devices described above. Figure 32 A schematic diagram of another electronic device according to the present application is shown. The electronic device 60a further comprises an image capturing device 70a and an image capturing device 70b. The image capturing device 70, the image capturing device 70a, and the image capturing device 70b are all single-focus and face the same direction, and the image capturing device 70, the image capturing device 70a, and the image capturing device 70b have different angles of view (where the image capturing device 70a is a telephoto device, the image capturing device 70b is a wide-angle device, and the angle of view of the image capturing device 70 can be between the image capturing device 70a and the image capturing device 70b), so that the electronic device can provide different magnifications to achieve an optical zoom effect. Further, the image capturing device 70 of this embodiment further comprises an extended image signal processor 76, so that when the image capturing device 70 is used in combination with the telephoto image capturing device 70a and the wide-angle image capturing device 70b, the image captured on the touch screen can be zoomed in or out to meet the image processing functions of multiple lenses. The electronic device 60a equipped with the image capturing device 70 has multiple modes of shooting functions, such as zoom, telephoto, multi-lens co-photography, optimized selfie, high dynamic range (HDR) in low light, and high-resolution 4K video recording, etc.

[0163] The imaging lens disclosed by the present application is not limited to be applied to a smart phone. The imaging lens can be applied to a system with mobile focusing and has the features of good aberration correction and good imaging quality. For example, the imaging lens can be applied to various electronic devices such as a 3D image capturing device, a digital camera, a mobile device, a tablet computer, a smart television, a network monitoring device, a driving recorder, a reversing device, a multi-lens device, an identification system, a motion sensing game console, and a wearable device. The above-mentioned electronic devices are only exemplary to illustrate the practical application examples of the present application, and are not intended to limit the application range of the image capturing device of the present application.

[0164] Although the present application has been disclosed with the above-mentioned embodiments, these embodiments are not intended to limit the present application. Any modification and improvement made without departing from the spirit and scope of the present application shall fall within the patent protection scope of the present application. The protection scope of the present application shall be subject to the appended claims.

Claims

1. An imaging lens, characterized in that, Include: An imaging lens group includes a first lens element, a second lens element, and a third lens element, wherein the first lens element is a glass lens element, and the second lens element and the third lens element are both plastic lens elements; A distance-maintaining element is used to position the first lens element between the second lens element and the third lens element, and to maintain a distance between the first lens element and the second lens element and the third lens element, respectively, and the distance-maintaining element comprises: A connecting portion, wherein the second lens element and the third lens element are respectively connected to opposite sides of the connecting portion in a direction parallel to an optical axis of the imaging lens group; and A support portion, connecting the connecting portion and extending from the connecting portion toward the optical axis of the imaging lens group, wherein the first lens element is disposed on the support portion; and A fixing element includes a fixing surface, and the fixing surface abuts against the first lens element to fix the first lens element to the support portion of the distance maintaining element; An air gap is provided between the fixing element and the first lens element, and the air gap is disposed adjacent to the fixing surface; The fixing surface and the supporting part respectively make physical contact with the two opposite surfaces of the first lens element; Wherein, the outer diameter of the first lens element is D1, the outer diameter of the second lens element is D2, and the outer diameter of the third lens element is D3, and they satisfy the following conditions: D1 / D2<1; and D1 / D3<1.

2. The imaging lens according to claim 1, characterized in that, The fixing surface is a sphere, and the fixing surface has solid contact with a curved surface of the first lens element.

3. The imaging lens according to claim 1, characterized in that, The fixing surface is a conical surface, and the fixing surface has solid contact with a curved surface of the first lens element.

4. The imaging lens according to claim 1, characterized in that, The fixing element comprises multiple wedge-shaped structures, which taper toward the air gap and are arranged around the optical axis.

5. The imaging lens according to claim 1, characterized in that, A plurality of strip structures are provided between the distance maintaining element and the fixing element, and the strip structures extend along a direction parallel to the optical axis and are arranged around the optical axis.

6. The imaging lens according to claim 1, characterized in that, The connecting portion has an axial connecting structure, the axial connecting structure being connected to the second lens element, and the axial connecting structure comprising: A beveled surface is used to ensure that the first lens element and the second lens element are coaxially aligned; and A ring plane is used to maintain the distance between the first lens element and the second lens element.

7. The imaging lens according to claim 6, characterized in that, The imaging lens group further includes a light-shielding plate, which is disposed between the first lens element and the second lens element, and the light-shielding plate is closer to the optical axis than the axial connection structure.

8. The imaging lens according to claim 1, characterized in that, The outer diameter of the fixing element is Φr, and the outer diameter of the second lens element is D2, which satisfy the following conditions: Φr / D2<1.

9. An imaging lens, characterized in that, Include: An imaging lens group includes a first lens element, a second lens element, and a third lens element, wherein the first lens element is a glass lens element, and the second lens element and the third lens element are both plastic lens elements; A distance-maintaining element is used to position the first lens element between the second lens element and the third lens element, and to maintain a distance between the first lens element and the second lens element and the third lens element, respectively, and the distance-maintaining element comprises: A connecting portion, wherein the second lens element and the third lens element are respectively connected to opposite sides of the connecting portion in a direction parallel to an optical axis of the imaging lens group; and A support portion, connecting the connecting portion and extending from the connecting portion toward the optical axis of the imaging lens group, wherein the first lens element is disposed on the support portion; and A fixing element includes a fixing surface, and the fixing surface abuts against the first lens element to fix the first lens element to the support portion of the distance maintaining element; The fixing element is disposed between the first lens element and the second lens element, and the fixing element has no physical contact with the second lens element; The fixing surface and the supporting part respectively make physical contact with the two opposite surfaces of the first lens element; Wherein, the outer diameter of the first lens element is D1, the outer diameter of the second lens element is D2, and the outer diameter of the third lens element is D3, and they satisfy the following conditions: D1 / D2<1; and D1 / D3<1.

10. The imaging lens according to claim 9, characterized in that, The connecting portion has an axial connecting structure, the axial connecting structure being connected to the second lens element, and the axial connecting structure comprising: A beveled surface is used to ensure that the first lens element and the second lens element are coaxially aligned; and A ring plane is used to maintain the distance between the first lens element and the second lens element.

11. The imaging lens according to claim 10, characterized in that, The imaging lens group further includes a light-shielding plate, which is disposed between the first lens element and the second lens element, and the light-shielding plate is closer to the optical axis than the axial connection structure.

12. The imaging lens according to claim 9, characterized in that, The distance retaining element is integrally manufactured by injection molding, and the distance retaining element has at least two injection marks.

13. The imaging lens according to claim 9, characterized in that, The outer diameter of the fixing element is Φr, and the outer diameter of the second lens element is D2, which satisfy the following conditions: Φr / D2<1.

14. An imaging lens, characterized in that, Include: An imaging lens group includes a first lens element, a second lens element, and a third lens element, wherein the first lens element is a glass lens element, and the second lens element and the third lens element are both plastic lens elements; A distance-maintaining element is used to position the first lens element between the second lens element and the third lens element, and to maintain a distance between the first lens element and the second lens element and the third lens element, respectively, and the distance-maintaining element comprises: A connecting portion, wherein the second lens element and the third lens element are respectively connected to opposite sides of the connecting portion in a direction parallel to an optical axis of the imaging lens group; and A support portion, connecting the connecting portion and extending from the connecting portion toward the optical axis of the imaging lens group, wherein the first lens element is disposed on the support portion; and A fixing element includes a fixing surface, and the fixing surface abuts against the first lens element to fix the first lens element to the support portion of the distance maintaining element; The fixing surface and the supporting part respectively make physical contact with the two opposite surfaces of the first lens element; Wherein, the outer diameter of the first lens element is D1, the outer diameter of the second lens element is D2, and the outer diameter of the third lens element is D3, and they satisfy the following conditions: D1 / D2<1; and D1 / D3<1.

15. The imaging lens according to claim 14, characterized in that, The imaging lens group has N lens elements, which satisfy the following conditions: 3≤N≤10。 16. The imaging lens according to claim 15, characterized in that, The first lens element has positive refractive power.

17. The imaging lens according to claim 14, characterized in that, The distance retaining element is integrally formed by injection molding, and the distance retaining element has at least two injection marks.

18. The imaging lens according to claim 14, characterized in that, An air gap is provided between the fixing element and the first lens element, and the air gap is disposed adjacent to the fixing surface.

19. The imaging lens according to claim 14, characterized in that, The fixing element has no physical contact with either the second lens element or the third lens element.

20. An electronic device, characterized in that, Include: The imaging lens according to claim 14; and An electronic photosensitive element is disposed on an imaging surface of the imaging lens.

Images