CN112394493B - Optical lens and imaging apparatus - Google Patents
Optical lens and imaging apparatus Download PDFInfo
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- CN112394493B CN112394493B CN202110065769.1A CN202110065769A CN112394493B CN 112394493 B CN112394493 B CN 112394493B CN 202110065769 A CN202110065769 A CN 202110065769A CN 112394493 B CN112394493 B CN 112394493B
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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Abstract
The invention discloses an optical lens and imaging equipment, the optical lens includes from the object side to the imaging surface along the optical axis in turn: a diaphragm; the first lens with positive focal power has a convex object-side surface and a concave image-side surface; a second lens element having a negative power, a concave object-side surface, and a convex image-side surface at a paraxial region; a third lens having a power, an object-side surface of which is convex at a paraxial region and an image-side surface of which is concave at a paraxial region; the image side surface of the fourth lens is a convex surface; a fifth lens element having a negative optical power, wherein both the object-side surface and the image-side surface of the fifth lens element are concave at a paraxial region thereof, and both the object-side surface and the image-side surface of the fifth lens element have at least one inflection point; and (3) a filter. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are all aspheric lenses. The optical lens can reduce the influence of ghost on the imaging quality and realize the balance of high pixel and miniaturization.
Description
Technical Field
The present invention relates to the field of imaging lens technology, and in particular, to an optical lens and an imaging device.
Background
At present, along with the popularization of portable electronic equipment and the popularity of social, video and live broadcast software, people have higher and higher degrees of love for photography, a camera lens becomes a standard configuration of the electronic equipment, and the camera lens even becomes an index which is considered for the first time when consumers purchase the electronic equipment. In recent years, with the development of design level and manufacturing technology, the size, weight and performance of the imaging lens have been reduced.
However, the inventor of the present invention finds, in a research on the conventional imaging lens, that, in order to improve the imaging performance of the lens, on one hand, the number of lenses is increased, and a design of 6 to 7 lenses is usually adopted, which results in a larger lens volume and higher cost, and ghost affects the imaging quality; on the other hand, the design of the optical lens with a more complex surface shape is adopted, so that the product structure sensitivity is high, the processing difficulty is increased, and the influence of the ambient light on the imaging quality is increased.
Disclosure of Invention
To this end, an object of the present invention is to provide an optical lens and an imaging apparatus for solving the above problems.
The embodiment of the invention implements the above object by the following technical scheme.
In a first aspect, the present invention provides an optical lens, comprising, in order from an object side to an image plane along an optical axis: a diaphragm; the lens comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a fifth lens with positive focal power, a sixth; a second lens having a negative optical power, the second lens having a concave object-side surface and a convex image-side surface at a paraxial region; a third lens having a power, an object-side surface of the third lens being convex at a paraxial region and an image-side surface of the third lens being concave at a paraxial region; the fourth lens has positive focal power, and the image side surface of the fourth lens is a convex surface; a fifth lens having a negative optical power, the fifth lens having both an object-side surface and an image-side surface that are concave at a paraxial region, and the fifth lens having both an object-side surface and an image-side surface that have at least one inflection point; the optical filter is arranged between the fifth lens and the imaging surface; wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are all aspheric lenses; the optical lens satisfies the conditional expression: 0.9< ET23/CT2< 1.1; wherein ET23 represents the air space of the second lens from the third lens at 1.0 aperture and CT2 represents the center thickness of the second lens.
In a second aspect, the present invention provides an imaging apparatus, comprising an imaging element and the optical lens provided in the first aspect, wherein the imaging element is configured to convert an optical image formed by the optical lens into an electrical signal.
Compared with the prior art, the optical lens provided by the invention has the advantages that through reasonable collocation of the combination of the lens shape and the focal power among the lenses, the influence of ghost on the imaging quality is effectively reduced, meanwhile, the interval sensitivity between the second lens and the third lens is reduced, the production and the processing are convenient, the production yield of the lens is improved, the structure of the lens is more compact while the lens has a better imaging effect, the balance of high pixel and miniaturization is better realized, and the requirement of the market on a small-size high-pixel camera can be met.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a diagram of an inner anti-ghost optical path in a first lens of a five-lens optical lens in the prior art;
FIG. 2 is a schematic structural diagram of an optical lens system according to a first embodiment of the present invention;
FIG. 3 is a vertical axis chromatic aberration diagram of an optical lens according to a first embodiment of the present invention;
FIG. 4 is a diagram illustrating a distortion curve of an optical lens according to a first embodiment of the present invention;
FIG. 5 is a diagram illustrating an inner anti-ghost optical path in the first lens of the optical lens system according to the first embodiment of the present invention;
FIG. 6 is a vertical axis chromatic aberration diagram of an optical lens according to a second embodiment of the present invention;
FIG. 7 is a diagram illustrating distortion curves of an optical lens according to a second embodiment of the present invention;
FIG. 8 is a diagram illustrating an inner anti-ghost optical path in the first lens of the optical lens system according to the second embodiment of the present invention;
FIG. 9 is a vertical axis chromatic aberration diagram of an optical lens according to a third embodiment of the present invention;
fig. 10 is a distortion graph of an optical lens in a third embodiment of the present invention;
fig. 11 is an optical path diagram of an inner anti-ghost image in the first lens of the optical lens system according to the third embodiment of the present invention;
FIG. 12 is a vertical axis chromatic aberration diagram of an optical lens according to a fourth embodiment of the present invention;
fig. 13 is a distortion graph of an optical lens in a fourth embodiment of the present invention;
fig. 14 is an optical path diagram of an inner anti-ghost image in the first lens of the optical lens system according to the fourth embodiment of the present invention;
fig. 15 is a schematic configuration diagram of an image forming apparatus provided in a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The inventor researches and discovers that the problems of low product yield, high requirement on a processing process and the like are caused by the common phenomenon of high interval tolerance sensitivity due to the fact that the distance between the second lens and the third lens is short and the caliber of the third lens is small in the conventional five-piece type optical lens; in addition, most of the image side surfaces of the first lens (L1) are concave, and a ghost image of four times of reflection in L1 (specifically, as shown in an inner reflection ghost optical path diagram of L1 in fig. 1) exists, so that the ghost image energy is strong, and the defect of the four times of reflection ghost image cannot be improved by a plating film at present, and the imaging effect of the lens is affected. In view of this, the present invention provides an optical lens, which at least has the characteristics of small volume, low tolerance sensitivity, good imaging quality effect, and the like.
The invention provides an optical lens, which sequentially comprises a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and an optical filter from an object side to an imaging surface along an optical axis.
Wherein, the diaphragm is arranged in front of the first lens.
The first lens has positive focal power, the object side surface of the first lens is a convex surface, the image side surface of the first lens is a concave surface, and the image side surface of the first lens is provided with an inflection point;
the second lens has negative focal power, the object side surface of the second lens is concave, and the image side surface of the second lens is convex at a paraxial region;
the object side surface of the third lens is convex at a paraxial region, and the image side surface of the third lens is concave at the paraxial region;
the fourth lens has positive focal power, the object side surface of the fourth lens is convex or concave at a paraxial region, and the image side surface of the fourth lens is convex;
the fifth lens element has a negative optical power, an object-side surface that is concave at a paraxial region, an image-side surface that is concave at a paraxial region, and at least one inflection point on both the object-side surface and the image-side surface of the fifth lens element.
As an embodiment, the first lens, the second lens, the third lens, the fourth lens and the fifth lens may be aspheric lenses, and the aspheric lenses may effectively reduce the number of lenses, correct aberrations, and provide better optical performance.
In some embodiments, the optical lens satisfies the conditional expression:
0.9<ET23/CT2<1.1；（1）
where ET23 represents the air space between the second and third lenses at 1.0 aperture and CT2 represents the center thickness of the second lens. The condition formula (1) is met, the distance between the second lens and the third lens is reasonably controlled, the problem that tolerance sensitivity of the lens is large due to the fact that the distance between the second lens and the third lens is too close can be avoided, gap sensitivity between the second lens and the third lens is effectively reduced, and the yield of products is improved.
In some embodiments, the optical lens satisfies the conditional expression:
0.3<(D5-D4)/D4<0.4；（2）
where D4 denotes an effective aperture of the image-side surface of the second lens, and D5 denotes an effective aperture of the object-side surface of the third lens. The third lens has a larger caliber and is convenient to realize the large image height of the lens by meeting the conditional expression (2), thereby being beneficial to realizing the high-definition imaging of the lens.
In some embodiments, the optical lens satisfies the conditional expression:
(SAG20.8-SAG2)/R2>0；（3）
among them, SAG20.8Denotes the sagittal height of the image-side surface of the first lens at 0.8 aperture (0.8 aperture being the position of 80% of the maximum effective aperture of the lens surface), SAG2 denotes the sagittal height of the image-side surface of the first lens at 1.0 aperture (1.0 aperture being the position of the maximum effective aperture of the lens surface), and R2 denotes the radius of curvature of the image-side surface of the first lens. The condition formula (3) is met, the fact that the image side face of the first lens is provided with the inflection point at the aperture of 0.8 is shown, the reflection angle of the ghost is changed by reasonably setting the surface type of the edge view field of the first lens, and therefore the shape of the ghost reflected by four times in the first lens is changed, and the effect of effectively reducing ghost energy is achieved.
In some embodiments, the optical lens satisfies the conditional expression:
0.8<(CT12-ET12)/ET12<1.4；（4）
where CT12 denotes an air space between the first lens and the second lens on the optical axis, and ET12 denotes an air space between the first lens and the second lens at an aperture of 1.0. Satisfy conditional expression (4), through the interval of reasonable setting between first, the two lenses, can effectively contract light, reduce the optical distance, correct the aberration.
In some embodiments, the optical lens satisfies the conditional expression:
1.1<(φ1-φ3)/φ<1.35；（5）
where φ 1 represents the focal power of the first lens, φ 3 represents the focal power of the third lens, and φ represents the focal power of the optical lens. The condition (5) is satisfied, the sensitivity of the first lens can be shared by the third lens, so that the sensitivity of the first lens is reduced, and the third lens has a larger caliber and is not very sensitive, so that the production yield of the lens is greatly improved.
In some embodiments, the optical lens satisfies the conditional expression:
2<θ10/R10<10；（6）
where θ 10 denotes an edge surface inclination of the image-side surface of the fifth lens, and R10 denotes a curvature radius of the image-side surface of the fifth lens. The conditional expression (6) is satisfied, and the surface type of the fifth lens is reasonably controlled, so that the incident angle of the chief ray can be effectively controlled, and the phenomenon that the imaging effect is influenced by the ghost image due to the overlarge inclination angle of the edge surface of the image side surface of the fifth lens can be avoided.
In some embodiments, the optical lens satisfies the conditional expression:
0.1<SAG8/R8<0.5；（7）
where SAG8 represents the sagittal height of the image-side surface of the fourth lens at 1.0 aperture, and R8 represents the radius of curvature of the image-side surface of the fourth lens. The conditional expression (7) is satisfied, and the improvement of the resolution and the correction of the aberration are facilitated by reasonably controlling the surface shape of the image side surface of the fourth lens; the surface shape of the fourth lens is set to be gentle, so that the lens is easy to be coated.
In some embodiments, the optical lens satisfies the conditional expression:
1.2<φ4/φ<1.6；（8）
where Φ 4 denotes an optical power of the fourth lens, and Φ denotes an optical power of the optical lens. The fourth lens has larger focal power and is beneficial to shortening the total optical length of the lens when the conditional expression (8) is satisfied.
In some embodiments, the optical lens satisfies the conditional expression:
0.48<SD6/R6<0.73，（9）
1.63<SD6/SD4<1.74；（10）
where SD4 denotes an effective half aperture of the image-side surface of the second lens, SD6 denotes an effective half aperture of the image-side surface of the third lens, and R6 denotes a radius of curvature of the image-side surface of the third lens. The third lens meets the conditional expressions (9) and (10), so that the image side surface of the third lens is smooth at the paraxial position, and has a larger caliber, thereby being beneficial to reducing the sensitivity of the third lens and reducing the processing difficulty.
In this embodiment, as a mode, when each lens in the optical lens is an aspheric lens, each aspheric surface shape of the optical lens may satisfy the following equation:
wherein z is the distance rise from the aspheric surface vertex when the aspheric surface is at the position of height h along the optical axis direction, c is the paraxial curvature of the surface, k is conic coefficient, A2iIs the aspheric surface type coefficient of 2i order.
The invention is further illustrated below in the following examples. In each of the following embodiments, the thickness and the radius of curvature of each lens in the optical lens are different, and specific differences can be referred to in the parameter tables in the embodiments.
First embodiment
Referring to fig. 2, an optical lens 100 according to a first embodiment of the present invention sequentially includes, from an object side to an image plane: the lens includes a stop ST, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter G.
The first lens L1 has positive power, the object-side surface S1 of the first lens is convex, the image-side surface S2 of the first lens is concave, and the image-side surface S2 of the first lens has an inflection point;
the second lens L2 has negative focal power, the object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex;
the third lens L3 has positive optical power, with an object-side surface S5 of the third lens being convex at the paraxial region and an image-side surface S6 of the third lens being concave at the paraxial region;
the fourth lens L4 has positive optical power, the object-side surface S7 of the fourth lens is convex at the paraxial region, and the image-side surface S8 of the fourth lens is convex;
the fifth lens element L5 has negative power, the fifth lens element has an object-side surface S9 that is concave at the paraxial region and an image-side surface S10 that is concave at the paraxial region, and each of the object-side and image-side surfaces has an inflection point.
The first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4 and the fifth lens element L5 are all plastic aspheric lenses.
Specifically, each lens parameter of the optical lens 100 provided in this embodiment is shown in table 1:
TABLE 1
In this embodiment, aspheric parameters of each lens in the optical lens 100 are shown in table 2.
TABLE 2
Referring to fig. 3, fig. 4 and fig. 5, a vertical axis chromatic aberration graph, a distortion graph and an optical path diagram of an L1 internal reflection ghost image of the optical lens 100 are shown, respectively.
The vertical axis chromatic aberration curve of fig. 3 shows chromatic aberration at different image heights on the image forming surface for each wavelength with respect to the center wavelength (0.550 μm). In fig. 3, the horizontal axis represents the homeotropic color difference (unit: μm) of each wavelength with respect to the center wavelength, and the vertical axis represents the normalized angle of view. As can be seen from fig. 3, the vertical chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ± 1 micron, which indicates that the vertical chromatic aberration of the optical lens 100 is well corrected.
Fig. 4 distortion curves represent the distortion at different image heights on the imaging plane. In fig. 4, the horizontal axis represents the distortion percentage of f-tan θ, and the vertical axis represents the angle of view (unit: degree). As can be seen from fig. 4, the optical distortion at different image heights on the image plane is controlled to be within 0.02%, which indicates that the distortion of the optical lens 100 is well corrected.
Fig. 5 shows the optical path diagram of the four-time reflection ghost in the L1 internal reflection ghost optical path diagram of the first lens L1, and it can be seen from fig. 5 that the exit position of the path of the four-time reflection ghost in L1 is at the reverse curve of the image side surface of the first lens, and the exit angle can reach 32 °, so that the ghost energy can be effectively diffused, and the influence of the ghost energy on the imaging can be reduced.
Second embodiment
The optical lens provided in this embodiment is substantially the same as the optical lens 100 of the first embodiment, except that the design parameters of each lens are different, and specific parameters related to each lens are shown in table 3.
TABLE 3
The aspherical surface parameters of each lens of this example are shown in table 4.
TABLE 4
Referring to fig. 6, fig. 7 and fig. 8, a vertical axis chromatic aberration curve, a distortion curve and an optical path diagram of an L1 internal reflection ghost image of the optical lens in the present embodiment are respectively shown.
As can be seen from fig. 6, the vertical chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ± 1 micron, which indicates that the vertical chromatic aberration of the optical lens in the embodiment is well corrected.
As can be seen from fig. 7, the optical distortion at different image heights on the image plane is controlled to be within 0.02%, which shows that the distortion of the optical lens in this embodiment is well corrected.
As can be seen from fig. 8, the exit position of the path of the four-reflection ghost in L1 is at the planar reflection, and the exit angle can reach 38 °, so that the ghost energy can be effectively dispersed, and the influence of the ghost energy on the image formation can be reduced.
Third embodiment
The optical lens provided by the present embodiment is substantially the same as the optical lens 100 of the first embodiment, except that the third lens has negative focal power, the fourth lens L4 has different structures, and the design parameters of the respective lenses are different, specifically, the edge rise on the image-side surface S8 of the fourth lens is a little larger, which is beneficial to correcting aberration and improving imaging quality.
Specifically, the design parameters of the optical lens provided in this embodiment are shown in table 5.
TABLE 5
Aspherical parameters of the respective lenses in the optical lens in this embodiment are shown in table 6.
TABLE 6
Referring to fig. 9, fig. 10 and fig. 11, a vertical axis chromatic aberration curve, a distortion curve and an optical path diagram of an L1 internal reflection ghost image of the optical lens in the present embodiment are respectively shown.
As can be seen from fig. 9, the vertical chromatic aberration of the longest wavelength and the shortest wavelength are controlled within ± 1 micron, which indicates that the vertical chromatic aberration of the optical lens in the embodiment is well corrected.
As can be seen from fig. 10, the optical distortion at different image heights on the image plane is controlled to be within 0.02%, which shows that the distortion of the optical lens in the present embodiment is well corrected.
As can be seen from fig. 11, the exit position of the path of the four-reflection ghost in L1 is at the planar reflection, and the exit angle can reach 37 °, so that the ghost energy can be effectively dispersed, and the influence of the ghost energy on the image formation can be reduced.
Fourth embodiment
The optical lens provided in this embodiment is substantially the same as the optical lens 100 of the first embodiment, except that the structure of the fourth lens L4 is different, and the design parameters of each lens are different, specifically, the edge rise on the image side surface S8 of the fourth lens is a little larger, which is beneficial to correcting aberration and improving image quality.
Specifically, the design parameters of the optical lens provided in this embodiment are shown in table 7.
TABLE 7
Aspherical parameters of the respective lenses in the optical lens in this embodiment are shown in table 8.
TABLE 8
Referring to fig. 12, 13 and 14, a vertical axis chromatic aberration graph, a distortion graph and an optical path diagram of an L1 internal reflection ghost image of the optical lens in the present embodiment are shown, respectively.
As can be seen from fig. 12, the vertical chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ± 1 micron, which indicates that the vertical chromatic aberration of the optical lens in the embodiment is well corrected.
As can be seen from fig. 13, the optical distortion at different image heights on the image plane is controlled to be within 0.02%, which shows that the distortion of the optical lens in the present embodiment is well corrected.
As can be seen from fig. 14, the exit position of the path of the four-reflection ghost in L1 is at the planar reflection, and the exit angle can reach 35 °, so that the ghost energy can be effectively dispersed, and the influence of the ghost energy on the image formation can be reduced.
Referring to table 9, table 9 shows the optical characteristics of the optical lens in the above four embodiments, including the focal length F, F #, total optical length TTL, and field angle 2 θ of the optical lens, and the related values corresponding to each of the above conditional expressions.
TABLE 9
As can be seen from the vertical axis chromatic aberration and distortion curve graphs of the above embodiments, the vertical axis chromatic aberration of the optical lens in each embodiment is less than 1um, and the distortion is less than 2%, which indicates that the imaging picture has small distortion and high definition; from the L1 ghost reflection path, the exit angles of the fourth reflection of the ghost generated by the L1 four reflections are all larger than 30 °, and the exit positions are all at the positions of the L1 image side surface type reverse curvature, so that the ghost rays are more divergent and the energy is lower.
In conclusion, the optical lens provided by the invention has the advantages that through reasonably matching the lens shape and focal power combination among the lenses, the ghost image of the optical lens is effectively corrected, the sensitivity of the lenses is reasonably distributed, the problem of low production yield caused by high sensitivity of the gap between the second lens and the third lens is relieved, the aperture of the third lens is larger, and larger image height can be obtained, so that the requirement of high pixel is met; therefore, the optical lens provided by the embodiment of the invention has the advantages of low ghost image energy, high imaging quality, miniaturization and high yield, has good applicability to portable electronic equipment, and can effectively improve the shooting experience of users.
Fifth embodiment
Referring to fig. 15, a fifth embodiment of the present invention provides an imaging apparatus 200, where the imaging apparatus 200 includes an imaging element 210 and an optical lens (e.g., the optical lens 100) in any of the embodiments described above. The imaging element 210 may be a CMOS (Complementary Metal Oxide Semiconductor) image sensor, and may also be a CCD (Charge Coupled Device) image sensor.
The imaging device 200 may be a smartphone, Pad, or any other form of portable electronic device that incorporates the optical lens described above.
The imaging device 200 provided by the embodiment of the application comprises the optical lens, and the optical lens has the advantages of high imaging quality, miniaturization and high yield, so that the imaging device 200 with the optical lens also has the advantages of high imaging quality and miniaturization.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An optical lens, comprising, in order from an object side to an image plane along an optical axis:
a diaphragm;
the lens comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a fifth lens with positive focal power, a sixth;
a second lens having a negative optical power, the second lens having a concave object-side surface and a convex image-side surface at a paraxial region;
a third lens having a power, an object-side surface of the third lens being convex at a paraxial region and an image-side surface of the third lens being concave at a paraxial region;
the fourth lens has positive focal power, and the image side surface of the fourth lens is a convex surface;
a fifth lens having a negative optical power, the fifth lens having both an object-side surface and an image-side surface that are concave at a paraxial region, and the fifth lens having both an object-side surface and an image-side surface that have at least one inflection point; and
the optical filter is arranged between the fifth lens and the imaging surface;
the number of the lenses in the optical lens is five, and the first lens, the second lens, the third lens, the fourth lens and the fifth lens are all aspheric lenses;
the optical lens satisfies the conditional expression: 0.9< ET23/CT2< 1.1;
wherein ET23 represents the air space between the second lens and the third lens at 1.0 aperture, CT2 represents the center thickness of the second lens, and 1.0 aperture is the maximum effective aperture of the lens surface.
2. An optical lens according to claim 1, wherein the optical lens satisfies the conditional expression: 0.3< (D5-D4)/D4< 0.4;
wherein D4 represents the effective aperture of the image-side surface of the second lens, and D5 represents the effective aperture of the object-side surface of the third lens.
3. An optical lens according to claim 1, wherein the optical lens satisfies the conditional expression: (SAG20.8-SAG2)/R2>0；
Among them, SAG20.8Representing the sagittal height of the image-side surface of the first lens at 0.8 aperture, SAG2 representing the sagittal height of the image-side surface of the first lens at 1.0 aperture, R2 representing the radius of curvature of the image-side surface of the first lens, 0.8 aperture being the location of 80% of the maximum effective aperture of the lens surface.
4. An optical lens according to claim 1, wherein the optical lens satisfies the conditional expression: 0.8< (CT12-ET12)/ET12< 1.4;
wherein CT12 denotes an air space of the first lens and the second lens on an optical axis, and ET12 denotes an air space of the first lens and the second lens at an aperture of 1.0.
5. An optical lens according to claim 1, wherein the optical lens satisfies the conditional expression: 1.1< (phi 1-phi 3)/phi < 1.35;
wherein φ 1 represents the focal power of the first lens, φ 3 represents the focal power of the third lens, and φ represents the focal power of the optical lens.
6. An optical lens according to claim 1, wherein the optical lens satisfies the conditional expression: 2 °/mm < θ 10/R10<10 °/mm;
where θ 10 denotes an edge surface inclination of an image-side surface of the fifth lens, and R10 denotes a radius of curvature of the image-side surface of the fifth lens.
7. An optical lens according to claim 1, wherein the optical lens satisfies the conditional expression: 0.1< SAG8/R8< 0.5;
wherein SAG8 represents the sagittal height of the image side surface of the fourth lens at 1.0 aperture, and R8 represents the radius of curvature of the image side surface of the fourth lens.
8. An optical lens according to claim 1, wherein the optical lens satisfies the conditional expression: 1.2< 4/1.6;
where φ 4 represents the focal power of the fourth lens, φ represents the focal power of the optical lens.
9. An optical lens according to claim 1, wherein the optical lens satisfies the conditional expression: 0.48< SD6/R6<0.73, 1.63< SD6/SD4< 1.74;
wherein SD4 denotes an effective half aperture of the image-side surface of the second lens, SD6 denotes an effective half aperture of the image-side surface of the third lens, and R6 denotes a radius of curvature of the image-side surface of the third lens.
10. An imaging apparatus comprising the optical lens according to any one of claims 1 to 9 and an imaging element for converting an optical image formed by the optical lens into an electric signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110065769.1A CN112394493B (en) | 2021-01-19 | 2021-01-19 | Optical lens and imaging apparatus |
| PCT/CN2022/072482 WO2022156660A1 (en) | 2021-01-19 | 2022-01-18 | Optical lens and imaging apparatus |
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|---|---|---|---|
| CN202110065769.1A CN112394493B (en) | 2021-01-19 | 2021-01-19 | Optical lens and imaging apparatus |
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| CN112394493B (en) * | 2021-01-19 | 2021-04-02 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
| CN113703139B (en) * | 2021-10-29 | 2022-04-01 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
| CN114326062B (en) * | 2022-03-14 | 2022-08-30 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
| CN114647066B (en) * | 2022-05-13 | 2022-10-21 | 江西联益光学有限公司 | Wide-angle lens |
| CN116719153B (en) * | 2023-08-10 | 2023-12-05 | 江西联益光学有限公司 | optical lens |
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| US7419892B2 (en) * | 2005-12-13 | 2008-09-02 | Cree, Inc. | Semiconductor devices including implanted regions and protective layers and methods of forming the same |
| TWI438520B (en) * | 2012-10-02 | 2014-05-21 | Largan Precision Co Ltd | Photographing lens assembly |
| US9042035B2 (en) * | 2012-12-04 | 2015-05-26 | Samsung Electronics Co., Ltd. | Photographing lens and electronic device |
| JP6394598B2 (en) * | 2013-07-12 | 2018-09-26 | コニカミノルタ株式会社 | Imaging lens, imaging device, and portable terminal |
| CN103969790B (en) * | 2013-12-09 | 2016-05-11 | 玉晶光电(厦门)有限公司 | Optical imaging lens and apply the electronic installation of this optical imaging lens |
| JP2015132687A (en) * | 2014-01-10 | 2015-07-23 | 富士フイルム株式会社 | Imaging lens and imaging device including the imaging lens |
| JP2015135357A (en) * | 2014-01-16 | 2015-07-27 | 富士フイルム株式会社 | Imaging lens and imaging device including the imaging lens |
| CN105445912B (en) * | 2015-04-09 | 2017-11-10 | 玉晶光电(厦门)有限公司 | Portable electronic devices and its optical imaging lens |
| CN212229308U (en) * | 2020-07-02 | 2020-12-25 | 辽宁中蓝光电科技有限公司 | Extremely little head gets for instance optical lens group |
| CN111983790B (en) * | 2020-09-03 | 2021-06-04 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112394493B (en) * | 2021-01-19 | 2021-04-02 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
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| CN112394493A (en) | 2021-02-23 |
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