CN116880043B - Optical lens - Google Patents
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- CN116880043B CN116880043B CN202311156527.9A CN202311156527A CN116880043B CN 116880043 B CN116880043 B CN 116880043B CN 202311156527 A CN202311156527 A CN 202311156527A CN 116880043 B CN116880043 B CN 116880043B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 186
- 238000003384 imaging method Methods 0.000 claims abstract description 25
- 230000014509 gene expression Effects 0.000 claims description 9
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- 238000010586 diagram Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000012634 optical imaging Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G02—OPTICS
- 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, which sequentially comprises from an object side to an imaging surface along an optical axis: a first lens having negative optical power, the object-side surface of which is concave at a paraxial region; a second lens with negative focal power, wherein the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; a diaphragm; a third lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a fourth lens having negative optical power; a fifth lens with negative focal power, wherein the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; a sixth lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a seventh lens element with negative refractive power having an object-side surface being convex at a paraxial region and an image-side surface being concave at a paraxial region; wherein, the optical total length TTL of the optical lens and the effective focal length f of the optical lens satisfy the following conditions: TTL/f is more than 1.8 and less than 2.2; the total optical length TTL of the optical lens satisfies: TTL < 7.5mm. The optical lens provided by the invention has the advantages of high pixels and miniaturization.
Description
Technical Field
The invention relates to the technical field of imaging lenses, in particular to an optical lens.
Background
In recent years, with the rising of smart phones, the demand for miniaturized photographic lenses is increasing, but the photosensitive devices of general photographic lenses are not only a photosensitive coupling device (CCD) or a complementary metal oxide semiconductor device (CMOS Sensor), and due to the refinement of the semiconductor manufacturing technology, the pixel size of the photosensitive devices is reduced, and the present electronic products are further developed in a form with good functions, light weight, thinness and smallness, so that miniaturized photographic lenses with good imaging quality are becoming the mainstream in the market at present. In order to obtain better imaging quality, the lens of the traditional mobile phone adopts a three-piece or four-piece lens structure. In addition, with the development of technology and the increase of the diversified demands of users, under the condition that the pixel area of the photosensitive device is continuously reduced and the requirement of the system on the imaging quality is continuously improved, five-piece, six-piece and seven-piece lens structures gradually appear in the lens design. At present, there is an urgent need for a wide-angle imaging lens having excellent optical characteristics, being ultra-thin, and having sufficient correction of chromatic aberration.
Disclosure of Invention
In view of the foregoing, it is an object of the present invention to provide an optical lens having at least the advantages of high pixel, small volume and large field angle.
The invention provides an optical lens, which sequentially comprises from an object side to an imaging surface along an optical axis: a first lens having negative optical power, the object-side surface of which is concave at a paraxial region; a second lens with negative focal power, wherein the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; a diaphragm; a third lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a fourth lens having negative optical power; a fifth lens with negative focal power, wherein the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; a sixth lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a seventh lens element with negative refractive power having an object-side surface being convex at a paraxial region and an image-side surface being concave at a paraxial region; wherein, the optical total length TTL of the optical lens and the effective focal length f of the optical lens satisfy: 1.8 < TTL/f < 2.2, wherein the total optical length TTL of the optical lens meets the following conditions: TTL < 7.5mm.
Compared with the prior art, the optical lens provided by the invention adopts seven lenses with specific focal power, and has the advantages of good imaging quality, small volume and large field angle through specific surface shape collocation and reasonable focal power distribution.
Drawings
Fig. 1 is a schematic structural diagram of an optical lens according to a first embodiment of the present invention.
Fig. 2 is a graph of F-Tan (θ) distortion of an optical lens according to a first embodiment of the present invention.
Fig. 3 is a graph showing a field curvature of an optical lens according to a first embodiment of the present invention.
Fig. 4 is a vertical axis chromatic aberration diagram of an optical lens according to a first embodiment of the present invention.
Fig. 5 is an axial chromatic aberration diagram of an optical lens according to a first embodiment of the present invention.
Fig. 6 is a schematic structural diagram of an optical lens according to a second embodiment of the present invention.
Fig. 7 is a graph of F-Tan (θ) distortion of an optical lens according to a second embodiment of the present invention.
Fig. 8 is a field curvature chart of an optical lens according to a second embodiment of the present invention.
Fig. 9 is a vertical axis chromatic aberration diagram of an optical lens according to a second embodiment of the present invention.
Fig. 10 is an axial chromatic aberration diagram of an optical lens according to a second embodiment of the present invention.
Fig. 11 is a schematic structural diagram of an optical lens according to a third embodiment of the present invention.
Fig. 12 is a graph of F-Tan (θ) distortion of an optical lens according to a third embodiment of the present invention.
Fig. 13 is a field curve diagram of an optical lens according to a third embodiment of the present invention.
Fig. 14 is a vertical axis chromatic aberration diagram of an optical lens according to a third embodiment of the present invention.
Fig. 15 is an axial chromatic aberration diagram of an optical lens according to a third embodiment of the present invention.
Fig. 16 is a schematic structural view of an optical lens according to a fourth embodiment of the present invention.
Fig. 17 is a graph of F-Tan (θ) distortion of an optical lens according to a fourth embodiment of the present invention.
Fig. 18 is a field curvature graph of an optical lens according to a fourth embodiment of the present invention.
Fig. 19 is a vertical axis chromatic aberration diagram of an optical lens according to a fourth embodiment of the present invention.
Fig. 20 is an axial chromatic aberration diagram of an optical lens according to a fourth embodiment of the present invention.
Detailed Description
In order that the objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Several embodiments of the invention are presented in the figures. 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. Like reference numerals refer to like elements throughout the specification.
The invention provides an optical lens, which sequentially comprises from an object side to an imaging surface along an optical axis: the optical centers of the first lens, the second lens, the diaphragm, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the optical filter are positioned on the same straight line.
The first lens has negative focal power, and the object side surface of the first lens is a concave surface at a paraxial region; the second lens has negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the fourth lens has negative focal power; the fifth lens has negative focal power, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive focal power, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; the seventh lens has negative focal power, an object side surface of the seventh lens is convex at a paraxial region, and an image side surface of the seventh lens is concave at the paraxial region.
In some embodiments, a diaphragm is located between the second lens and the third lens, for receiving light rays of a large angle of view to a large extent, and enabling the third lens to the seventh lens to correct aberrations well. More specifically, the optical lens provided by the invention has fewer lenses for expanding the angle of view, which is beneficial to simplifying the structure of the optical lens; the optical lens provided by the invention has a large number of lenses for correcting aberration, and is beneficial to obtaining better imaging quality.
In some embodiments, the optical total length TTL of the optical lens and the effective focal length f of the optical lens satisfy: 1.8 < TTL/f < 2.2. According to the invention, seven lens combinations with specific surface shapes and focal powers are adopted, and the diaphragm is arranged between the second lens and the third lens, so that the optical lens has a large aperture effect and good imaging quality; meanwhile, the range is satisfied, the total length and the volume of the optical lens are reduced, and the balance between miniaturization and high-pixel imaging of the optical lens is realized. More preferably, the total optical length TTL of the optical lens in the embodiment of the invention is less than 7.5mm, so that the optical lens is ultrathin.
In some embodiments, the radius of curvature R11 of the first lens object-side surface and the effective focal length f of the optical lens satisfy: -7.5 < R11/f < -5.0. The range is satisfied, the surface curvature of the object side surface of the first lens can be effectively controlled, the field angle is increased, the front end caliber of the optical lens is controlled, and the miniaturization and the large field angle balance of the optical lens are realized.
In some embodiments, the effective focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: -80 < f2/f < -40. The optical power of the second lens is reasonably arranged, so that the deflection degree of incident light can be slowed down, the view field angle of the optical lens is improved, the distortion correction difficulty of the marginal view field is reduced while the view field angle is increased, the lens has smaller distortion, the spherical aberration generated by the first lens can be effectively balanced, and the imaging quality of the optical lens is improved.
In some embodiments, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy: -65 < f2/f3 < -35; the center thickness CT2 of the second lens, the center thickness CT3 of the third lens, and the air space AT23 between the second lens and the third lens on the optical axis satisfy: 1.0 < (CT2+CT3)/AT 23 < 2.2. The optical lens has the advantages that the range is met, the focal length of the second lens and the third lens and the center thickness of the second lens and the center thickness of the third lens are reasonably set, the deflection degree of light passing through the lenses can be effectively alleviated, the curvature of field and distortion of the optical lens are effectively reduced, the distortion correction difficulty of the optical lens is reduced, and the imaging quality of the optical lens is improved.
In some embodiments, the effective focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: -6.0 < f4/f < -4.0. The range is satisfied, and the optical lens has better imaging quality and lower sensitivity by reasonably setting the focal power of the fourth lens.
In some embodiments, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the effective focal length f of the optical lens satisfy: -23 < (f4+f5)/f < -15. The optical lens system meets the above range, and the optical power of the fourth lens and the fifth lens is reasonably set, so that the fourth lens and the fifth lens have proper negative refractive power, which is beneficial to reducing system aberration and simultaneously beneficial to the development of ultrathin and wide-angle optical lenses.
In some embodiments, the effective focal length f3 of the third lens and the effective focal length f6 of the sixth lens satisfy: 1.0 < f3/f6 < 1.5. The length of the optical lens can be effectively compressed to realize the thin arrangement of the optical lens.
In some embodiments, the air space T23 on the optical axis between the second lens and the third lens, the distance T56 on the optical axis between the fifth lens and the sixth lens, and the total optical length TTL of the optical lens satisfy: 0.05 < (T23+T56)/TTL < 0.15. The length of the optical lens can be effectively compressed to realize the thin arrangement of the optical lens.
In some embodiments, the maximum effective aperture DM6 of the sixth lens and the maximum effective aperture DM7 of the seventh lens satisfy: DM6/DM7 is more than 0.4 and less than 0.7; the radius of curvature R62 of the sixth lens image-side surface and the radius of curvature R72 of the seventh lens image-side surface satisfy: -1.8 < R62/R72 < -1.2. The aperture and the surface shape of the sixth lens and the seventh lens are reasonably arranged, so that the deflection degree of light is reasonably controlled, the incident angle of the light entering an image surface can be increased, the large-target-surface imaging of the optical lens is realized, a large-size chip can be better matched, and the high-pixel imaging of the optical lens is realized.
In some embodiments, the effective focal length f of the optical lens and the maximum half field angle θ of the optical lens satisfy: f×tan θ is 5.0 < 5.8. The above range is satisfied, and large target surface imaging of the optical lens can be realized.
In some embodiments, the optical back focal length BFL of the optical lens and the effective focal length f of the optical lens satisfy: BFL/f is more than 0.2 and less than 0.3. The range is satisfied, the back focus and the focal length of the optical lens can be reasonably matched, the imaging area of the optical lens is relatively large, and meanwhile, the optical lens has longer optical back focus, so that the assembly of the optical lens is facilitated.
In some embodiments, the radius of curvature R32 of the image side of the third lens and the radius of curvature R41 of the object side of the fourth lens satisfy: -0.7 < R32/R41 < 0.7. The focal power of the image side surface of the third lens and the focal power of the object side surface of the fourth lens can be balanced better, and the focusing function can be realized better.
In some embodiments, the radius of curvature R51 of the fifth lens object-side surface and the radius of curvature R52 of the fifth lens image-side surface satisfy: R51/R52 is more than 0.5 and less than 1.0; the radius of curvature R62 of the sixth lens element image-side surface and the radius of curvature R52 of the fifth lens element image-side surface satisfy: R62/R52 is more than 0 and less than 0.5. The focal length distribution of the fifth lens and the sixth lens can be effectively controlled by reasonably setting the surface shapes of the fifth lens and the sixth lens so as to balance the focal power of the whole optical system.
As an implementation mode, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens can be all plastic lenses or glass-plastic mixed matching, and good imaging effect can be achieved. In the embodiment of the invention, in order to better reduce the volume of the optical lens and reduce the manufacturing cost of the optical lens, seven plastic lens combinations are adopted, and the optical lens at least has the advantages of good imaging quality, large aperture, low sensitivity, miniaturization and large field angle by reasonably distributing the focal power of each lens and optimizing the aspherical shape. Specifically, the first lens to the seventh lens can all adopt plastic aspherical lenses, and the aspherical lenses can effectively correct aberration, improve imaging quality and provide optical performance products with higher cost performance.
The invention is further illustrated in the following examples. In various embodiments, the thickness, radius of curvature, and material selection portion of each lens in the optical lens may vary, and for specific differences, reference may be made to the parameter tables of the various embodiments. The following examples are merely preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the following examples, and any other changes, substitutions, combinations or simplifications that do not depart from the gist of the present invention are intended to be equivalent substitutes within the scope of the present invention.
In various embodiments of the present invention, when an aspherical lens is used as the lens, the surface shape of the aspherical lens satisfies the equation:the method comprises the steps of carrying out a first treatment on the surface of the Where z is the distance sagittal height from the aspherical surface vertex when the aspherical surface is at a position of height h along the optical axis direction, c is the paraxial curvature of the surface, k is the conic coefficient conic, A 2i The aspherical surface profile coefficient of the 2 i-th order.
First embodiment
Referring to fig. 1, a schematic structural diagram of an optical lens 100 according to a first embodiment of the present invention is shown, where the optical lens 100 includes, in order from an object side to an imaging surface S17 along an optical axis: a first lens L1, a second lens L2, a stop ST, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter G1.
The first lens element L1 has negative refractive power, wherein an object-side surface S1 of the first lens element is concave at a paraxial region, and an image-side surface S2 of the first lens element is concave; the second lens L2 has negative focal power, the object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface; the third lens element L3 has positive refractive power, wherein an object-side surface S5 of the third lens element is convex, and an image-side surface S6 of the third lens element is convex; the fourth lens element L4 has negative refractive power, wherein an object-side surface S7 of the fourth lens element is concave, and an image-side surface S8 of the fourth lens element is convex; the fifth lens element L5 has negative refractive power, wherein an object-side surface S9 of the fifth lens element is concave, and an image-side surface S10 of the fifth lens element is convex; the sixth lens element L6 with positive refractive power has a concave object-side surface S11 and a convex image-side surface S12; the seventh lens L7 has negative focal power, an object side surface S13 of the seventh lens is convex at a paraxial region, and an image side surface S14 of the seventh lens is concave at the paraxial region; the object side surface of the filter G1 is S15, and the image side surface is S16. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 are all plastic aspheric lenses.
Specifically, the design parameters of each lens of the optical lens 100 provided in the present embodiment are shown in table 1.
TABLE 1
The aspherical surface coefficients of the optical lens 100 in this embodiment are shown in table 2.
TABLE 2
Referring to fig. 2, 3, 4 and 5, an F-Tan (θ) distortion curve, a field curvature curve, a vertical axis chromatic aberration curve and an axial chromatic aberration curve of the optical lens 100 are shown. As can be seen from fig. 2, the F-Tan (θ) distortion is controlled within ±2%, indicating that the distortion of the optical lens 100 is well corrected; as can be seen from fig. 3, the curvature of field is controlled within ±0.16mm, which indicates that the curvature of field of the optical lens 100 is better corrected; it can be seen from fig. 4 that the vertical chromatic aberration at different wavelengths is controlled within ±3.5μm, and that the lateral chromatic aberration at different wavelengths is controlled within ±0.03mm from fig. 5, which indicates that the chromatic aberration of the optical lens 100 is well corrected; as can be seen from fig. 2, 3, 4 and 5, the optical lens 100 has good optical imaging quality.
Second embodiment
Referring to fig. 6, a schematic structural diagram of an optical lens 200 according to a second embodiment of the present invention is shown, and the optical lens 200 according to the present embodiment is substantially the same as the first embodiment described above, and the differences of the radius of curvature, aspheric coefficients, thickness and material of the lens surfaces are mainly different.
Specifically, the design parameters of the optical lens 200 provided in this embodiment are shown in table 3.
TABLE 3 Table 3
The aspherical surface coefficients of the optical lens 200 in this embodiment are shown in table 4.
TABLE 4 Table 4
Referring to fig. 7, 8, 9 and 10, an F-Tan (θ) distortion curve, a field curvature curve, a vertical axis chromatic aberration curve and an axial chromatic aberration curve of the optical lens 200 are shown. As can be seen from fig. 7, the F-Tan (θ) distortion is controlled within ±2%, indicating that the distortion of the optical lens 200 is well corrected; as can be seen from fig. 8, the curvature of field is controlled within ±0.1mm, which indicates that the curvature of field of the optical lens 200 is better corrected; it can be seen from fig. 9 that the vertical chromatic aberration at different wavelengths is controlled within ±2.0μm, and that the lateral chromatic aberration at different wavelengths is controlled within ±0.03mm from fig. 10, which indicates that the chromatic aberration of the optical lens 200 is well corrected; as can be seen from fig. 7, 8, 9 and 10, the optical lens has good optical imaging quality.
Third embodiment
Referring to fig. 11, a schematic structural diagram of an optical lens 300 according to a third embodiment of the present invention is shown, and the optical lens 300 in this embodiment is substantially the same as the first embodiment described above, except that the curvature radius, aspheric coefficients, thickness and material of each lens surface are different.
Specifically, the design parameters of the optical lens 300 provided in this embodiment are shown in table 5.
TABLE 5
The aspherical surface coefficients of the optical lens 300 in this embodiment are shown in table 6.
TABLE 6
Referring to fig. 12, 13, 14 and 15, an F-Tan (θ) distortion curve, a field curvature curve, a vertical axis chromatic aberration curve and an axial chromatic aberration curve of the optical lens 300 are shown. As can be seen from fig. 12, the F-Tan (θ) distortion is controlled within ±2%, indicating that the distortion of the optical lens 300 is well corrected; from fig. 13, it can be seen that the curvature of field is controlled within ±0.14mm, which indicates that the curvature of field of the optical lens 300 is better corrected; it can be seen from fig. 14 that the vertical chromatic aberration at different wavelengths is controlled within ±2.2μm, and from fig. 15 that the lateral chromatic aberration at different wavelengths is controlled within ±0.035mm, which means that the chromatic aberration of the optical lens 300 is well corrected; as can be seen from fig. 12, 13, 14 and 15, the optical lens 300 has good optical imaging quality.
Fourth embodiment
Referring to fig. 16, a schematic structural diagram of an optical lens 400 according to a fourth embodiment of the present invention is shown, and the optical lens 400 in this embodiment is substantially the same as the first embodiment described above, except that the curvature radius, aspheric coefficients, thickness and material of each lens surface are different.
Specifically, the design parameters of the optical lens 400 provided in this embodiment are shown in table 7.
TABLE 7
The aspherical surface coefficients of the optical lens 400 in this embodiment are shown in table 8.
TABLE 8
Referring to fig. 17, 18, 19 and 20, an F-Tan (θ) distortion curve, a field curvature curve, a vertical axis chromatic aberration curve and an axial chromatic aberration curve of the optical lens 400 are shown. As can be seen from fig. 17, the F-Tan (θ) distortion is controlled within ±2%, indicating that the distortion of the optical lens 400 is well corrected; as can be seen from fig. 18, the curvature of field is controlled within ±0.1mm, which indicates that the curvature of field of the optical lens 400 is better corrected; as can be seen from fig. 19, the vertical chromatic aberration at different wavelengths is controlled within ±2.0μm, and as can be seen from fig. 20, the lateral chromatic aberration at different wavelengths is controlled within ±0.04mm, which means that the chromatic aberration of the optical lens 400 is well corrected; as can be seen from fig. 17, 18, 19 and 20, the optical lens 400 has good optical imaging quality.
Referring to table 9, the optical characteristics of the optical lens provided in the above four embodiments, including the maximum field angle 2θ, the total optical length TTL, the effective focal length f, the entrance pupil diameter EPD, and the correlation values corresponding to each of the above conditional expressions, are shown.
TABLE 9
In summary, from the F-Tan (θ) distortion curve graph, the field curvature graph, the vertical axis chromatic aberration curve graph and the axial chromatic aberration curve graph of each embodiment, it can be seen that the F-Tan (θ) distortion value, the field curvature value, the vertical axis chromatic aberration and the axial chromatic aberration of the optical lens in each embodiment are all within ±2%, within ±0.16mm, within ±3.5 μm and within ±0.04mm, respectively, which indicates that the optical lens provided by the present invention has the advantages of high imaging quality, small volume and large field angle, and simultaneously has good resolution.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (9)
1. An optical lens comprising seven lenses in total, in order from an object side to an imaging surface along an optical axis, comprising:
a first lens having negative optical power, an object-side surface of the first lens being concave at a paraxial region;
a second lens with negative focal power, wherein the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;
a diaphragm;
a third lens with positive focal power, wherein the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;
a fourth lens having negative optical power;
a fifth lens with negative focal power, wherein an object side surface of the fifth lens is a concave surface, and an image side surface of the fifth lens is a convex surface;
a sixth lens with positive focal power, wherein an object side surface of the sixth lens is a concave surface, and an image side surface of the sixth lens is a convex surface;
a seventh lens having negative optical power, an object-side surface of the seventh lens being convex at a paraxial region and an image-side surface of the seventh lens being concave at the paraxial region;
wherein, the optical total length TTL of the optical lens and the effective focal length f of the optical lens satisfy: TTL/f is more than 1.8 and less than 2.2; the total optical length TTL of the optical lens meets the following conditions: TTL < 7.5mm; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: -23 < (f4+f5)/f < -15.
2. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
-7.5＜R11/f＜-5.0；
wherein R11 represents the radius of curvature of the first lens object side surface, and f represents the effective focal length of the optical lens.
3. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
-80＜f2/f＜-40；
wherein f2 represents an effective focal length of the second lens, and f represents an effective focal length of the optical lens.
4. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
-65＜f2/f3＜-35；
1.0＜(CT2+CT3)/AT23＜2.2；
wherein f2 denotes an effective focal length of the second lens, f3 denotes an effective focal length of the third lens, CT2 denotes a center thickness of the second lens, CT3 denotes a center thickness of the third lens, and AT23 denotes an air space between the second lens and the third lens on an optical axis.
5. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
-6.0＜f4/f＜-4.0；
wherein f4 represents an effective focal length of the fourth lens, and f represents an effective focal length of the optical lens.
6. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
1.0＜f3/f6＜1.5；
wherein f3 represents an effective focal length of the third lens, and f6 represents an effective focal length of the sixth lens.
7. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
0.05＜(T23+T56)/TTL＜0.15；
wherein T23 represents an air space on an optical axis between the second lens and the third lens, T56 represents a distance on the optical axis between the fifth lens and the sixth lens, and TTL represents an optical total length of the optical lens.
8. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
0.4＜DM6/DM7＜0.7；
-1.8＜R62/R72＜-1.2；
wherein DM6 represents the maximum effective aperture of the sixth lens, DM7 represents the maximum effective aperture of the seventh lens, R62 represents the radius of curvature of the image side surface of the sixth lens, and R72 represents the radius of curvature of the image side surface of the seventh lens.
9. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
5.0＜f×tanθ＜5.8；
where f represents the effective focal length of the optical lens, and θ represents the maximum half field angle of the optical lens.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873254A (en) * | 2018-07-05 | 2018-11-23 | 浙江舜宇光学有限公司 | Optical imaging system |
| WO2020119145A1 (en) * | 2018-12-11 | 2020-06-18 | 浙江舜宇光学有限公司 | Camera lens |
| CN111308671A (en) * | 2020-04-09 | 2020-06-19 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN112099186A (en) * | 2019-06-18 | 2020-12-18 | 大立光电股份有限公司 | Photographing lens system, image capturing device and electronic device |
| CN112748524A (en) * | 2020-12-29 | 2021-05-04 | 常州市瑞泰光电有限公司 | Image pickup optical lens |
| CN113419330A (en) * | 2021-06-07 | 2021-09-21 | 江西晶超光学有限公司 | Optical system, camera module, electronic equipment and carrier |
| CN115128771A (en) * | 2022-09-01 | 2022-09-30 | 江西联创电子有限公司 | Optical lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873254A (en) * | 2018-07-05 | 2018-11-23 | 浙江舜宇光学有限公司 | Optical imaging system |
| WO2020119145A1 (en) * | 2018-12-11 | 2020-06-18 | 浙江舜宇光学有限公司 | Camera lens |
| CN112099186A (en) * | 2019-06-18 | 2020-12-18 | 大立光电股份有限公司 | Photographing lens system, image capturing device and electronic device |
| CN111308671A (en) * | 2020-04-09 | 2020-06-19 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN112748524A (en) * | 2020-12-29 | 2021-05-04 | 常州市瑞泰光电有限公司 | Image pickup optical lens |
| CN113419330A (en) * | 2021-06-07 | 2021-09-21 | 江西晶超光学有限公司 | Optical system, camera module, electronic equipment and carrier |
| CN115128771A (en) * | 2022-09-01 | 2022-09-30 | 江西联创电子有限公司 | Optical lens |
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