CN115657257A

CN115657257A - Internal focusing imaging lens

Info

Publication number: CN115657257A
Application number: CN202211420331.1A
Authority: CN
Inventors: 毛鑫伟; 常斌全; 赵烈烽; 戴付建
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-01-31

Abstract

The application discloses imaging lens focuses in, includes: the lens barrel comprises a lens group and at least one shading element which are arranged in the lens barrel; the lens group and the lens cone are coaxially arranged; the lens group at least comprises a lens with a petal-shaped supporting arm at the outer side; the petal-shaped supporting arms are arranged at the hollow-out positions of the lens cones. According to the technical scheme of the internal focusing imaging lens, the petal-shaped supporting arms are arranged on the lens used for focusing in the lens barrel, the petal-shaped supporting arms are matched and fixed with the voice coil motor, and the third lens can move along the direction of the optical axis under the driving of the voice coil motor after being assembled, so that the purpose of optical focusing is achieved; meanwhile, when the lens, the lens barrel and other parts of the lens are matched and arranged to meet a certain condition, the assembly stability of the lens can be obviously improved.

Description

Internal focusing imaging lens

Technical Field

The application relates to the technical field of lenses, in particular to an internal focusing imaging lens.

Background

With the development of imaging products toward specialization, integration and convenience, the imaging lens matched with the imaging products is required to be specialized and mature continuously, for example, the current mobile phone camera focusing technology realizes the internal focusing technology with the help of a Voice Coil Motor (VCM) technology and a plurality of groups of imaging lenses: in the focusing process, the total length of the lens groups is kept unchanged, and the plurality of lens groups complete focusing under the cooperation of the voice coil motor (normally, the front and rear lens groups of the three groups of lens groups are not moved, and the middle group of lens groups moves back and forth).

The focusing of the traditional mobile phone depends on a small stop aperture and a large depth of field of a wide-angle lens to achieve a basically clear shooting effect, and the simple camera using the super-focal length has a very small application range and relatively poor imaging quality. As can be seen from the optical principle, light rays are refracted after passing through the imaging lens, the intersection point of the light rays is called a focal point, a plane formed by all points at a position where the image can be clearly imaged is generally called a focal plane, and the image is blurred the farther the scene is in front of and behind the focal plane. Therefore, in essence, the traditional mobile phone focusing mode is a set of data calculation method integrated in the mobile phone ISP (image signal processor), which cannot adjust the photosensitive element, has obvious limitation, and is a compromise for miniaturization of the imaging system and cost.

Therefore, in order to further improve the imaging quality of the mobile phone, currently, each terminal gradually adopts the process technologies of "active focusing", "inner focusing", "variable focal length lens" and the like in the flagship product, and the principles thereof are all that the optical element generates spatial displacement or angular deflection, so that the whole optical system reaches the theoretically optimal imaging state, and the optical focal length is changed to make the focal plane fall on the Image plane (Image Sensor). In the process of continuous evolution of physical focusing, how to ensure imaging stability and how to balance cost become important factors considered by each family.

Disclosure of Invention

The present application aims to provide an internal focusing imaging lens, which can significantly improve the assembly stability of the lens when the lens, the lens barrel and other components of the lens are matched to meet a certain condition.

The application provides an interior imaging lens that focuses, imaging lens includes: the lens barrel comprises a lens group and at least one shading element which are arranged in the lens barrel; the lens group and the lens barrel are coaxially arranged; the lens group at least comprises a lens with a petal-shaped supporting arm arranged on the outer side; the petal-shaped supporting arms are arranged at the hollow parts of the lens cone.

According to an embodiment of the present application, the inner focusing imaging lens further includes a first lens, and the first lens is made of a plastic material; the first lens has a transmittance T1 in a wavelength band of 420nm-750nm, and satisfies the following conditions: t1 is more than or equal to 90 percent.

According to one embodiment of the application, the inner focusing imaging lens comprises a first lens, wherein the first lens is composed of an optical effective part and a non-optical effective part connected with the optical effective part; the half aperture R of the lens, the radius a of the optical effective part and the width b of the non-optical effective part of the first lens meet the following requirements: r = a + b.

According to one embodiment of the application, the lens with the petal-shaped supporting arms arranged on the outer side is made of plastic materials; the lens that the outside is equipped with petal form support arm satisfies at wave band 420nm-750 nm's transmittance T3: t3 is more than or equal to 90 percent.

According to one embodiment of the application, the lens provided with the petaloid support arms on the outer side is composed of an optically effective portion and a non-optically effective portion connected with the optically effective portion; the non-optical effective part is provided with the petal-shaped supporting arm, and the length e, the width f and the angle g of the petal-shaped supporting arm meet the following requirements: e is more than or equal to 0.05mm, f is more than or equal to 0.05mm, and g is more than or equal to 5 degrees.

According to one embodiment of the application, the inner focusing imaging lens comprises a first lens, and the half aperture R of the lens with the outer side provided with the petal-shaped supporting arm is larger than the half aperture R of the lens of the first lens; the lens half bore R of the lens that the outside was equipped with petal form support arm with the lens half bore R of first lens satisfies: R-R is more than or equal to 0.05mm.

According to one embodiment of the application, the imaging lens further comprises a small lens group, and the small lens group at least comprises a lens of which the outer side is provided with a petal-shaped supporting arm; when the number N of the lenses of the small lens group is more than or equal to 2, the annular boss arranged on the image side surface of the lens with the petal-shaped supporting arm on the outer side is buckled with the fourth boss arranged on the inner side of the object side surface of the adjacent lens on the image side surface of the lens with the petal-shaped supporting arm on the outer side.

According to an embodiment of the application, annular boss set up in the outside is equipped with the effective past of the optics of the lens image side of petal form support arm outside and the outer aperture position department within, the height h of annular boss, the ring width j of annular boss satisfies: h is more than or equal to 0.08mm and less than or equal to 0.2mm, j is more than or equal to 0.08mm; the height k of the fourth boss and the height h of the annular boss meet the following requirements: k is less than or equal to h.

According to an embodiment of the present application, the convex ring surface outside the non-optical effective part of the lens, the outer side of which is provided with the petal-shaped supporting arm, is attached to the first bearing surface of the lens barrel, and the axial thickness w at the first bearing surface of the lens barrel satisfies: w is more than or equal to 0.25mm.

According to an embodiment of the present application, the lens barrel hollow angle m satisfies: m is larger than or equal to g, the radius p of the inner opening at the rear end of the lens cone and the half aperture r of the lens with the petal-shaped supporting arm arranged on the outer side meet the following conditions: p is more than or equal to r.

The beneficial effect of this application lies in:

according to the technical scheme of the internal focusing imaging lens, the petal-shaped supporting arms are arranged on the lens for focusing in the lens barrel, the petal-shaped supporting arms are matched and fixed with the voice coil motor, and the lens with the petal-shaped supporting arms arranged on the outer side can move along the direction of the optical axis under the driving of the voice coil motor after being assembled, so that the purpose of optical focusing is achieved; meanwhile, when the lens, the lens barrel and other parts of the lens are matched and arranged to meet a certain condition, the assembly stability of the lens can be obviously improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an internal focusing imaging lens according to an embodiment of the present application;

FIG. 2 is a front cross-sectional view of an inner focus imaging lens according to an embodiment of the present disclosure;

FIG. 3 is a side cross-sectional view of a front end of an inner focus imaging lens according to an embodiment of the present application;

fig. 4 is a schematic view of a hollow structure of a lens barrel according to an embodiment of the present application;

fig. 5 is a schematic view illustrating an installation of a lens and a lens barrel with petal-shaped support arms disposed outside thereof according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a first lens element according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a lens with petal-shaped support arms disposed outside according to an embodiment of the present application;

FIG. 8 is a schematic view of the installation of a small lens group according to an embodiment of the present application;

FIG. 9 is a schematic view of a lens with petal-shaped support arms disposed on the outer side thereof and an adjacent lens;

FIG. 10 is a schematic view of an inner focus imaging lens according to an embodiment of the present application;

FIG. 11 is a schematic diagram of a small lens group of an embodiment of the present application with only one lens;

FIG. 12 is a schematic diagram of a lenslet group having two lenses according to an embodiment of the present application;

FIG. 13 is a schematic diagram of a lenslet set having three lenses according to an embodiment of the present application

FIG. 14 is a schematic view of a rear end of a small lens group without a lens according to an embodiment of the present application;

FIG. 15 is a schematic view of a first lens element according to an embodiment of the present application having a rough surface and ink applied to the rough surface;

fig. 16 is a schematic view of a lens provided with petal-shaped support arms on the outer side thereof, which is roughened and coated with ink according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Further, when a statement such as "at least one of" appears after a list of listed features, that the entire listed feature is modified rather than a single element of the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

In the description of the present application, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. Features, principles and other aspects of the present application will be described in detail below with reference to the drawings and in conjunction with embodiments.

Exemplary embodiments

Referring to fig. 1, 2, 3, 4 and 5, in an exemplary embodiment of the present application, the inner focus imaging lens includes: a lens barrel 1, a lens group 2 disposed in the lens barrel 1, and a light shielding member 3; the lens group 2 and the lens barrel 1 are coaxially arranged, and the lens barrel 1 and the lens group 2 are coaxially assembled, so that the same standard is formed in the production process, the production efficiency is improved, and the assembly portability is improved during assembly. In the embodiment of the present application, the lens group 2 includes a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25, a sixth lens 26, and a seventh lens 27. Wherein, a shading element 31 is arranged between the first lens 21 and the second lens 22, a shading element 32 is arranged between the third lens 23 and the fourth lens 24, and a shading element 33 is arranged between the fourth lens 24 and the fifth lens 25; wherein, the outer side of the third lens 23 is provided with a petal-shaped supporting arm 231, and the petal-shaped supporting arm 231 is disposed at the hollow 11 of the lens barrel 1. When the lens barrel is assembled, the third lens 23 is installed in the lens barrel 1 according to a specific angle, here, the petal-shaped supporting arms 231 on the outer side of the third lens 23 are placed in the hollow 11 of the lens barrel 1, when the lens barrel is assembled, the third lens is installed according to the specific angle by using image recognition, interference is avoided, and the rest lenses, the shading elements and the like are installed in sequence.

In the exemplary embodiment of the present application, it is preferable that the first lens 21 is made of a plastic material, and a transmittance T1 of the first lens 21 in a wavelength band of 420nm to 750nm satisfies: t1 is larger than or equal to 90%, and in the embodiment of the application, the MTF performance of the lens can be ensured due to the high transmittance.

Referring to fig. 6, in the exemplary embodiment of the present application, the first lens 21 is composed of an optically effective portion and a non-optically effective portion connecting the optically effective portion; the half aperture R of the first lens element 21, the optically effective portion radius a, and the non-optically effective portion width b satisfy: r = a + b.

In the exemplary embodiment of the present application, it is preferable that the third lens 23 is a plastic material; the third lens 23 has a passing rate T3 in a wave band of 420nm-750nm, which satisfies: t3 is larger than or equal to 90%, and in the embodiment of the application, the MTF performance of the lens can be ensured due to the high transmittance.

Referring to fig. 7, in the exemplary embodiment of the present application, the third lens 23 is composed of an optically effective portion and a non-optically effective portion connecting the optically effective portion, wherein the semi-aperture of the optically effective portion is c, the semi-aperture of the non-optically effective portion is d, and the half-aperture of the lens of the third lens 23 is r = c + d; the non-optically active portion is provided with the petal-shaped support arms 231, the length e, width f and angle g of which satisfy: e is more than or equal to 0.05mm, f is more than or equal to 0.05mm, g is more than or equal to 5 degrees, in the embodiment of the present application, the petal-shaped supporting arm 231 is used for being matched and fixed with the voice coil motor, and the third lens 23 can move along the optical axis direction under the driving of the voice coil motor after being assembled, so as to realize the purpose of optical focusing.

With continued reference to fig. 6 and 7, in the exemplary embodiment of the present application, the half aperture R of the third lens 23 is larger than the half aperture R of the first lens 21; the half aperture R of the third lens element 23 and the half aperture R of the first lens element 21 satisfy: R-R is more than or equal to 0.05mm.

In the exemplary embodiment of the present application, the inner focusing imaging lens includes a small lens group including at least the third lens 23, wherein the number N of the lenses of the small lens group is greater than or equal to 2. Referring to fig. 1, 8 and 9, the third lens 23, the fourth lens 24, the fifth lens 25, and the light shielding element 32 and the light shielding element 33 of the inner focusing imaging lens of the embodiment are regarded as a small lens group when assembled and actuated. The fourth lens 24 and the fifth lens 25 are relatively loose to be matched with the lens barrel 1, so that the lens barrel is convenient to axially move as a whole; the fourth lens 24 and the fifth lens 25 are axially positioned and mainly supported by the third lens 23, and the two lenses are matched in a buckling mode and fixed by glue. Wherein, the third lens 23 cooperates with the fourth lens 24 through the cylinder or the conical surface of outer bore department, and in order to reach better laminating effect, the image side of third lens 23 is outside the effective footpath of optics, outer bore is in order to be provided with annular boss 232, and the height h of this annular boss 232 satisfies: h is more than or equal to 0.08mm and less than or equal to 0.2mm; the width j of the annular boss 232 satisfies the following conditions: j is more than or equal to 0.08mm; correspondingly, a fourth boss 241 is also disposed on the inner side of the object-side surface of the fourth lens 24, and the height k of the fourth boss 241 satisfies: k is less than or equal to h.

In the exemplary embodiment of the present application, the convex annular surface 233 outside the non-optical effective portion of the third lens 23 is attached to the first bearing surface of the lens barrel 1, in this application example, in order to ensure better assembling effect, the axial thickness w at the first bearing surface of the lens barrel 1 satisfies: w is more than or equal to 0.25mm.

In the exemplary embodiment of the present application, with continued reference to fig. 2, 7 and 10, the angle m at the hollow 11 of the lens barrel 1 satisfies: m is larger than or equal to g, the radius p of the inner opening at the rear end of the lens cone 1 and the semi-caliber r of the lens of the third lens 23 meet the following conditions: p is more than or equal to r.

Specific embodiments of an optical imaging lens suitable for the above-described embodiments are further described below with reference to the drawings.

Detailed description of the preferred embodiment 1

Referring to fig. 11, the inner focus imaging lens includes: a lens barrel 1, a lens group 2 disposed in the lens barrel 1, and a light shielding member 3. Wherein the lens group 2 includes: a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, and a fifth lens 25. The light shielding member 3 is disposed between the first lens 21 and the second lens 22. The outer side of the third lens 23 is provided with a petal-shaped supporting arm 231, and the petal-shaped supporting arm 231 is arranged at the hollow 11 of the lens barrel 1. When the lens barrel is assembled, the third lens 23 is installed in the lens barrel 1 according to a specific angle, here, the petal-shaped supporting arms 231 outside the third lens 23 are placed at the hollow 11 of the lens barrel 1, and when the lens barrel is assembled, the third lens is installed according to the specific angle by using image recognition, so that interference is avoided, and the rest lenses, the shading elements and the like are installed in sequence.

The first lens 21 and the third lens 23 are made of plastic materials, and the passing rates T of the first lens 21 and the third lens 23 in the wave band of 420nm-750nm both satisfy: t is more than or equal to 90 percent.

The length e, width f, and angle g of the petal-shaped support arms 231 satisfy: e is more than or equal to 0.05mm, f is more than or equal to 0.05mm, and g is more than or equal to 5 degrees.

The half aperture R of the lens of the third lens 23 and the half aperture R of the lens of the first lens 21 satisfy: R-R is more than or equal to 0.05mm.

In the embodiment of the present application, the small lens group only includes one lens of the third lens 23, and the third lens 23 is attached to the first bearing surface of the lens barrel 1 through the convex ring surface 233 outside the non-optical effective portion, wherein the axial thickness W of the first bearing surface is greater than or equal to 0.25mm.

The hollow-out 11-position angle m of the lens cone 1 meets the following requirements: m is more than or equal to g and more than or equal to 5 degrees, the radius p of the inner opening at the rear end of the lens cone 1 and the semi-caliber r of the lens of the third lens 23 meet the following conditions: p is more than or equal to r.

Specific example 2

Referring to fig. 12, the inner focus imaging lens includes: a lens barrel 1, a lens group 2 disposed in the lens barrel 1, and a light shielding member 3. Wherein the lens group 2 includes: a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25, and a sixth lens 26. The light shielding member 31 is disposed between the first lens 21 and the second lens 22, and the light shielding member 32 is disposed between the third lens 23 and the fourth lens 24. The outer side of the third lens 23 is provided with a petal-shaped supporting arm 231, and the petal-shaped supporting arm 231 is arranged at the hollow 11 of the lens barrel 1. When the lens barrel is assembled, the third lens 23 is installed in the lens barrel 1 according to a specific angle, here, the petal-shaped supporting arms 231 on the outer side of the third lens 23 are placed in the hollow 11 of the lens barrel 1, when the lens barrel is assembled, the third lens is installed according to the specific angle by using image recognition, interference is avoided, and the rest lenses, the shading elements and the like are installed in sequence.

The half aperture R of the third lens element 23 and the half aperture R of the first lens element 21 satisfy: R-R is more than or equal to 0.05mm.

In the embodiment of the present application, the small lens group is composed of the third lens 23 and the fourth lens 24, the third lens 23 is matched with the fourth lens 24 through the cylindrical surface or the conical surface at the outer caliber and fixed by glue, in order to achieve a better fitting effect, the image side surface of the third lens 23 is provided with the annular boss 232 outside the optical effective diameter and inside the outer caliber, and the height h of the annular boss 232 satisfies: h is more than or equal to 0.08mm and less than or equal to 0.2mm; the width j of the annular boss 232 satisfies the following conditions: j is more than or equal to 0.08mm; correspondingly, a fourth boss 241 is also disposed on the inner side of the object-side surface of the fourth lens 24, and the height k of the fourth boss 241 satisfies: k is less than or equal to h.

In the embodiment of the present application, the third lens 23 is attached to the first bearing surface of the lens barrel 1 through the convex ring surface 233 outside the non-optical effective portion, wherein the axial thickness W of the first bearing surface is greater than or equal to 0.25mm.

The hollow-out 11-position angle m of the lens cone 1 meets the following requirements: m is more than or equal to g and more than or equal to 5 degrees, the radius p of the inner opening at the rear end of the lens cone 1 and the half-aperture r of the lens of the third lens 23 meet the following conditions: p is more than or equal to r.

Specific example 3

Referring to fig. 13, the inner focus imaging lens includes: a lens barrel 1, a lens group 2 disposed within the lens barrel 1, and a light shielding member 3. Wherein the lens group 2 includes: a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25, a sixth lens 26, and a seventh lens 27. The light shielding member 31 is disposed between the first lens 21 and the second lens 22, the light shielding member 32 is disposed between the third lens 23 and the fourth lens 24, and the light shielding member 33 is disposed between the fourth lens 24 and the fifth lens 25. The outer side of the third lens 23 is provided with a petal-shaped supporting arm 231, and the petal-shaped supporting arm 231 is arranged at the hollow 11 of the lens barrel 1. When the lens barrel is assembled, the third lens 23 is installed in the lens barrel 1 according to a specific angle, here, the petal-shaped supporting arms 231 outside the third lens 23 are placed at the hollow 11 of the lens barrel 1, and when the lens barrel is assembled, the third lens is installed according to the specific angle by using image recognition, so that interference is avoided, and the rest lenses, the shading elements and the like are installed in sequence.

In the embodiment of the present application, the third lens 23, the fourth lens 24, the fifth lens 25, and the light shielding element 32 and the light shielding element 33 therein are regarded as a small lens group when being assembled and actuated. The fourth lens 24 and the fifth lens 25 are relatively loose in matching with the lens barrel 1, so that the lens barrel is convenient to move axially as a whole; the fourth lens 24 and the fifth lens 25 are axially positioned and mainly supported by the third lens 23, and the two lenses are matched in a buckling mode and fixed by glue. Wherein, the third lens 23 cooperates with the fourth lens 24 through the cylinder or the conical surface of outer bore department, and in order to reach better laminating effect, the image side of third lens 23 is outside the effective footpath of optics, outside the footpath of outer bore in order to be provided with annular boss 232, and the height h of this annular boss 232 satisfies: h is more than or equal to 0.08mm and less than or equal to 0.2mm; the width j of the annular boss 232 satisfies: j is more than or equal to 0.08mm; correspondingly, a fourth boss 241 is also disposed on the inner side of the object-side surface of the fourth lens 24, and the height k of the fourth boss 241 satisfies: k is less than or equal to h.

In another embodiment of the present application, the petal-shaped supporting arms 251 are disposed on the fifth lens 25, the fifth lens 25 is mounted in the lens barrel 1 according to a specific angle, here, the petal-shaped supporting arms 251 outside the fifth lens 25 are disposed at the hollow 12 of the lens barrel 1, and the small lens group is held at the middle position by the fourth lens 24 in a manner of being buckled by the third lens 23 and the fifth lens 25 without being fixed by glue.

Specific example 4

Referring to fig. 14, the inner focus imaging lens includes: a lens barrel 1, a lens group 2 disposed within the lens barrel 1, and a light shielding member 3. Wherein the lens group 2 includes: a first lens 21, a third lens 23, a fourth lens 24, a fifth lens 25, and a sixth lens 26. The light shielding member 31 is disposed between the first lens 23 and the second lens 24, and the light shielding member 32 is disposed between the third lens 25 and the fourth lens 26. The outer side of the third lens 23 is provided with a petal-shaped supporting arm 231, and the petal-shaped supporting arm 231 is disposed at the hollow 11 of the lens barrel 1. When the lens barrel is assembled, the third lens 23 is installed in the lens barrel 1 according to a specific angle, here, the petal-shaped supporting arms 231 on the outer side of the third lens 23 are placed in the hollow 11 of the lens barrel 1, when the lens barrel is assembled, the third lens is installed according to the specific angle by using image recognition, interference is avoided, and the rest lenses, the shading elements and the like are installed in sequence.

In the embodiment of the present application, the rear end of the small lens group does not include a lens, wherein the third lens 23, the fourth lens 24, the fifth lens 25, the sixth lens 26 of the inner focusing imaging lens, and the light shielding element 31 therein are regarded as a small lens group when being assembled and operated. The fourth lens 24, the fifth lens 25 and the sixth lens 26 are relatively loose to be matched with the lens barrel 1, so that the lens barrel can move axially as a whole; the fourth lens 24, the fifth lens 25 and the sixth lens 26 are axially positioned and mainly supported by the third lens 23, and the three lenses are matched in a buckling manner and fixed by glue. Wherein, the third lens 23 cooperates with the fourth lens 24 through the cylinder or the conical surface of outer bore department, and in order to reach better laminating effect, the image side of third lens 23 is outside the effective footpath of optics, outside the footpath of outer bore in order to be provided with annular boss 232, and the height h of this annular boss 232 satisfies: h is more than or equal to 0.08mm and less than or equal to 0.2mm; the width j of the annular boss 232 satisfies the following conditions: j is more than or equal to 0.08mm; correspondingly, a fourth boss 241 is also disposed on the inner side of the object-side surface of the fourth lens 24, and the height k of the fourth boss 241 satisfies: k is less than or equal to h.

In another embodiment of the present application, the petal-shaped supporting arms 261 are disposed on the sixth lens 26, the sixth lens 26 is installed in the lens barrel 1 according to a specific angle, here, the petal-shaped supporting arms 261 outside the sixth lens 26 are disposed at the hollow 12 of the lens barrel 1, so that the small lens groups are fastened by the third lens 23 and the sixth lens 25, and the fourth lens 24 and the fifth lens 25 are held at the middle position without being fixed by glue.

Specific example 5

Referring to fig. 1 and 15, the inner focus imaging lens includes: a lens barrel 1, a lens group 2 disposed within the lens barrel 1, and a light blocking member 3. Wherein the lens group 2 includes: a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25, a sixth lens 26, and a seventh lens 27. The light shielding member 31 is disposed between the first lens 21 and the second lens 22, the light shielding member 32 is disposed between the third lens 23 and the fourth lens 24, and the light shielding member 33 is disposed between the fourth lens 24 and the fifth lens 25. The outer side of the third lens 23 is provided with a petal-shaped supporting arm 231, and the petal-shaped supporting arm 231 is arranged at the hollow 11 of the lens barrel 1. When the lens barrel is assembled, the third lens 23 is installed in the lens barrel 1 according to a specific angle, here, the petal-shaped supporting arms 231 outside the third lens 23 are placed at the hollow 11 of the lens barrel 1, and when the lens barrel is assembled, the third lens is installed according to the specific angle by using image recognition, so that interference is avoided, and the rest lenses, the shading elements and the like are installed in sequence.

In the embodiment of the present application, the third lens 23, the fourth lens 24, the fifth lens 25, and the light shielding element 32 and the light shielding element 33 therein are regarded as a small lens group when being assembled and actuated. The fourth lens 24 and the fifth lens 25 are relatively loose in matching with the lens barrel 1, so that the lens barrel is convenient to move axially as a whole; the fourth lens 24 and the fifth lens 25 are axially positioned and mainly supported by the third lens 23, and the two lenses are matched in a buckling mode and fixed by glue. Wherein, the third lens 23 cooperates with the fourth lens 24 through the cylinder or the conical surface of outer bore department, and in order to reach better laminating effect, the image side of third lens 23 is outside the effective footpath of optics, outer bore is in order to be provided with annular boss 232, and the height h of this annular boss 232 satisfies: h is more than or equal to 0.08mm and less than or equal to 0.2mm; the width j of the annular boss 232 satisfies: j is more than or equal to 0.08mm; correspondingly, a fourth boss 241 is also disposed on the inner side of the object-side surface of the fourth lens 24, and the height k of the fourth boss 241 satisfies: k is less than or equal to h.

In another embodiment of the present application, the petal-shaped supporting arms 251 are disposed on the fifth lens 25, and the fifth lens 25 is installed in the lens barrel 1 according to a specific angle, where the petal-shaped supporting arms 251 on the outer side of the fifth lens 25 are disposed at the hollow 12 of the lens barrel 1, so that the small lens groups are fastened by the third lens 23 and the fifth lens 25, and the fourth lens 24 is held at the middle position without being fixed by glue.

In the embodiment of the present application, the first lens 21 is subjected to a rough surface treatment at a position where it is bonded to the lens barrel 1, and ink is applied to the rough surface. In the embodiment of the application, the reflectivity of the ink used for coating is controlled to be less than 1%, so that the reflected light of the side wall and the cut can be absorbed more effectively, and the problems of improving the appearance and the veiling glare are solved.

Specific example 6

Referring to fig. 1 and 16, the inner focus imaging lens includes: a lens barrel 1, a lens group 2 disposed within the lens barrel 1, and a light shielding member 3. Wherein the lens group 2 includes: a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25, a sixth lens 26, and a seventh lens 27. The light shielding member 31 is disposed between the first lens 21 and the second lens 22, the light shielding member 32 is disposed between the third lens 23 and the fourth lens 24, and the light shielding member 33 is disposed between the fourth lens 24 and the fifth lens 25. The outer side of the third lens 23 is provided with a petal-shaped supporting arm 231, and the petal-shaped supporting arm 231 is arranged at the hollow 11 of the lens barrel 1. When the lens barrel is assembled, the third lens 23 is installed in the lens barrel 1 according to a specific angle, here, the petal-shaped supporting arms 231 outside the third lens 23 are placed at the hollow 11 of the lens barrel 1, and when the lens barrel is assembled, the third lens is installed according to the specific angle by using image recognition, so that interference is avoided, and the rest lenses, the shading elements and the like are installed in sequence.

In the embodiment of the present application, the third lens 23, the fourth lens 24, the fifth lens 25, and the light shielding element 32 and the light shielding element 33 therein are regarded as a small lens group when being assembled and actuated. The fourth lens 24 and the fifth lens 25 are relatively loose in matching with the lens barrel 1, so that the lens barrel is convenient to move axially as a whole; the fourth lens 24 and the fifth lens 25 are axially positioned and mainly supported by the third lens 23, and the two lenses are matched in a buckling mode and fixed by glue. Wherein, the third lens 23 cooperates with the fourth lens 24 through the cylinder or the conical surface of outer bore department, and in order to reach better laminating effect, the image side of third lens 23 is outside the effective footpath of optics, outside the footpath of outer bore in order to be provided with annular boss 232, and the height h of this annular boss 232 satisfies: h is more than or equal to 0.08mm and less than or equal to 0.2mm; the width j of the annular boss 232 satisfies the following conditions: j is more than or equal to 0.08mm; correspondingly, a fourth boss 241 is also disposed on the inner side of the object-side surface of the fourth lens 24, and the height k of the fourth boss 241 satisfies: k is less than or equal to h.

In the embodiment of the present application, the third lens 23 is attached to the first bearing surface of the lens barrel 1 through the convex annular surface 233 outside the non-optical effective portion, wherein the axial thickness W of the first bearing surface is greater than or equal to 0.25mm.

11 angle m of fretwork of lens cone 1, satisfy: m is more than or equal to g and more than or equal to 5 degrees, the radius p of the inner opening at the rear end of the lens cone 1 and the semi-caliber r of the lens of the third lens 23 meet the following conditions: p is more than or equal to r.

In the embodiment of the present application, the third lens 23 is subjected to a rough surface treatment at a position where it is bonded to the lens barrel 1, and ink is applied to the rough surface. In the embodiment of the application, the reflectivity of the ink used for coating is controlled to be less than 1 percent, so that the reflected light of the side wall and the cut can be more effectively absorbed, and the problems of improving the appearance and the veiling glare are solved.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, improvement, equivalent replacement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An internal-focus imaging lens, comprising: the lens barrel comprises a lens group and at least one shading element which are arranged in the lens barrel;

the lens group and the lens barrel are coaxially arranged;

the lens group at least comprises

The outer side of the lens is provided with a petal-shaped supporting arm;

the petal-shaped supporting arms are arranged at the hollow-out positions of the lens cones.

2. The internal focusing imaging lens according to claim 1, wherein the internal focusing imaging lens comprises a first lens, and the first lens is made of plastic material;

the first lens has a transmittance T1 in a wavelength band of 420nm-750nm, and satisfies the following conditions: t1 is more than or equal to 90 percent.

3. The inner focus imaging lens according to claim 1, wherein the inner focus imaging lens comprises a first lens composed of an optically effective portion and a non-optically effective portion connecting the optically effective portion;

the half aperture R of the lens, the radius a of the optical effective part and the width b of the non-optical effective part of the first lens meet the following requirements: r = a + b.

4. The inner focusing imaging lens according to claim 1, wherein the lens with the petal-shaped supporting arms at the outer side is made of plastic material;

the lens that the outside is equipped with petal form support arm satisfies at wave band 420nm-750 nm's transmittance T3: t3 is more than or equal to 90 percent.

5. The inner-focusing imaging lens according to claim 1, wherein the lens provided with the petal-shaped supporting arms on the outer side is composed of an optically effective portion and a non-optically effective portion connecting the optically effective portion;

the non-optical effective part is provided with the petal-shaped supporting arms, and the length e, the width f and the angle g of the petal-shaped supporting arms meet the following requirements: e is more than or equal to 0.05mm, f is more than or equal to 0.05mm, and g is more than or equal to 5 degrees.

6. The internal focusing imaging lens according to claim 1, wherein the internal focusing imaging lens comprises a first lens, and the half aperture R of the lens with the petal-shaped supporting arms arranged on the outer side is larger than the half aperture R of the first lens;

the lens half bore R of the lens that the outside was equipped with petal form support arm with the lens half bore R of first lens satisfies: R-R is more than or equal to 0.05mm.

7. The imaging lens of claim 1, further comprising a small lens group, the small lens group comprising at least the lens with petal-shaped support arms on the outer side;

when the number N of the lenses of the small lens group is more than or equal to 2, the annular boss arranged on the image side surface of the lens with the petal-shaped supporting arm on the outer side is buckled with the fourth boss arranged on the inner side of the object side surface of the adjacent lens on the image side surface of the lens with the petal-shaped supporting arm on the outer side.

8. The internal focusing imaging lens according to claim 7, wherein the annular boss is disposed at a position outside the optical effective diameter of the lens image side surface provided with the petal-shaped supporting arm at the outer side and inside the outer aperture, the height h of the annular boss and the width j of the annular boss satisfy: h is more than or equal to 0.08mm and less than or equal to 0.2mm, j is more than or equal to 0.08mm;

the height k of the fourth boss and the height h of the annular boss meet the following requirements: k is less than or equal to h.

9. The inner focusing imaging lens according to claim 1, wherein the convex ring surface outside the non-optical effective part of the lens with the petal-shaped supporting arm arranged on the outer side is attached to the first bearing surface of the lens barrel, and the axial thickness w of the first bearing surface of the lens barrel satisfies: w is more than or equal to 0.25mm.

10. The inner focusing imaging lens according to claim 5, wherein the angle m of the hollowed part of the lens barrel satisfies the following conditions: m is more than or equal to g, the radius p of the inner opening at the rear end of the lens cone and the semi-caliber r of the lens with the petal-shaped supporting arm arranged on the outer side meet the following requirements: p is more than or equal to r.