CN117631224B - Optical lens - Google Patents
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- CN117631224B CN117631224B CN202410112853.8A CN202410112853A CN117631224B CN 117631224 B CN117631224 B CN 117631224B CN 202410112853 A CN202410112853 A CN 202410112853A CN 117631224 B CN117631224 B CN 117631224B
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Abstract
The invention discloses an optical lens, which comprises five lenses in sequence from an object side to an imaging surface along an optical axis: a first lens element with positive refractive power having a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region; a second lens having negative optical power, the object-side surface and the image-side surface of which are concave at a paraxial region; a third lens element with negative refractive power having a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region; a fourth lens element with positive refractive power having a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region; the object side surface and the image side surface of the fifth lens with negative focal power are concave at the paraxial region. The optical lens provided by the invention has smaller head caliber, large field angle and larger imaging surface, better realizes the balance of small volume, high screen occupation ratio and high pixels, and can meet the demand of light and thin portable electronic equipment.
Description
Technical Field
The invention relates to the technical field of imaging lenses, in particular to an optical lens.
Background
With the continuous increase of market competition, terminal manufacturers of portable electronic devices rapidly update their own product technologies. Optical lenses have evolved from an initial single pixel to the current diversification of lens imaging. In order to pursue better imaging effects, a front-end camera lens mounted on the portable electronic device has higher requirements, and certain requirements are placed on the head size, volume, imaging stability in bright and dark environments and the like of the lens while focusing on pixel lifting.
At present, more than 5 structural forms are adopted in the optical lens in the market, and the head size is great, so that the screen occupation ratio is difficult to promote, and the front-end camera lens is often lower in resolution, and is difficult to shoot an ultra-high definition picture, and better visual experience cannot be brought to consumers.
Disclosure of Invention
Therefore, the present invention is directed to an optical lens with advantages of small head, large viewing angle, high screen duty ratio, and high pixel, so as to meet the higher image capturing demands of consumers.
The embodiment of the invention realizes the aim through the following technical scheme.
The invention discloses an optical lens, which comprises five lenses in sequence from an object side to an imaging surface along an optical axis: a first lens element with positive refractive power having a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region; a second lens having negative optical power, the object-side surface and the image-side surface of which are concave at a paraxial region; a third lens element with negative refractive power having a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region; a fourth lens element with positive refractive power having a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region; a fifth lens element with negative refractive power having concave object-side and image-side surfaces at paraxial regions; wherein, the optical lens meets the following conditions of f3/f < -15;2.8< R41/R42<4.6; where f3 denotes a focal length of the third lens element, f denotes an effective focal length of the optical lens element, R41 denotes a radius of curvature of an object-side surface of the fourth lens element, and R42 denotes a radius of curvature of an image-side surface of the fourth lens element.
Compared with the prior art, the optical lens provided by the invention is composed of only 5 lenses with specific focal power and specific shape, so that the optical lens has the advantages of small head, large visual angle, high screen occupation ratio and high pixels, the requirements of light and thin portable electronic equipment can be met, the optical lens has smaller head outer diameter, and the use requirement of a full screen can be better met.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
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 showing F-Tanθ distortion of an optical lens according to a first embodiment of the present invention;
FIG. 3 is an axial aberration diagram of an optical lens according to a first embodiment of the present invention;
FIG. 4 is a graph showing a vertical axis chromatic aberration curve of an optical lens according to a first embodiment of the present invention;
FIG. 5 is a schematic diagram of an optical lens according to a second embodiment of the present invention;
FIG. 6 is a graph of F-Tanθ distortion of an optical lens according to a second embodiment of the present invention;
FIG. 7 is an axial aberration diagram of an optical lens according to a second embodiment of the present invention;
FIG. 8 is a graph showing a vertical axis chromatic aberration curve of an optical lens according to a second embodiment of the present invention;
FIG. 9 is a schematic diagram of an optical lens according to a third embodiment of the present invention;
FIG. 10 is a graph showing F-Tanθ distortion of an optical lens according to a third embodiment of the present invention;
FIG. 11 is an axial aberration diagram of an optical lens according to a third embodiment of the present invention;
FIG. 12 is a graph showing a vertical axis chromatic aberration curve of an optical lens according to a third embodiment of the present invention;
Fig. 13 is a schematic view illustrating a perpendicular distance between an inflection point of an image side of the fifth lens element and an optical axis.
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 comprises five lenses in sequence from an object side to an imaging surface along an optical axis: a first lens, a second lens, a third lens, a fourth lens and a fifth lens.
The first lens has positive focal power, the object side surface of the first lens is convex at a paraxial region, and the image side surface of the first lens is concave at the paraxial region;
the second lens has negative focal power, and the object side surface and the image side surface of the second lens are concave at the paraxial region;
The third lens has negative focal power, 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 element has positive refractive power, wherein an object-side surface thereof is concave at a paraxial region and an image-side surface thereof is convex at the paraxial region;
The fifth lens has negative focal power, and the object side surface and the image side surface of the fifth lens are concave at a paraxial region.
In some embodiments, the optical lens further includes a stop, which may be disposed at any position between the first lens element and the fifth lens element, for example, disposed on one side of an object side of the first lens element, where the diameter of the entrance pupil is the light entrance of the optical lens element and is substantially the same as the diameter of the stop; by adopting the mode of front diaphragm, the optical lens can be ensured to have enough light entering quantity, dark corners around the imaging surface are avoided, and the large aperture performance of the lens is better realized.
In some embodiments, the optical lens further includes an optical filter, and the optical filter includes an object side surface and an image side surface. The optical filter can be an infrared cut-off optical filter and is used for filtering interference light and preventing the interference light from reaching an imaging surface of the optical lens to influence normal imaging. Preferably, the optical filter is located between the fifth lens and the imaging surface, so that the imaging quality of the optical lens can be improved.
In some embodiments, the optical lens satisfies the following conditional expression:
0.8<f1/f<1；
Where f1 denotes a focal length of the first lens, and f denotes an effective focal length of the optical lens. The optical lens has the advantages that the reasonable focal power ratio of the first lens is set, the deflection degree of light passing through the first lens is reasonably controlled, the subsequent aberration correction difficulty is reduced, and the imaging quality of the optical lens is improved.
In some embodiments, the optical lens satisfies the following conditional expression:
-3.3<f2/f<-2.7；
-10<R21/R22<-0.2；
Where f2 denotes a focal length of the second lens, f denotes an effective focal length of the optical lens, R21 denotes a radius of curvature of an object side surface of the second lens, and R22 denotes a radius of curvature of an image side surface of the second lens. The optical power of the second lens is reasonable, the optical power is not concentrated, the deflection of light is not too large, the chromatic aberration correction difficulty of the optical lens is reduced, and the imaging quality is improved.
In some embodiments, the optical lens satisfies the following conditional expression:
f3/f<-15；
2.8<R41/R42<4.6；
Where f3 denotes a focal length of the third lens element, f denotes an effective focal length of the optical lens element, R41 denotes a radius of curvature of an object-side surface of the fourth lens element, and R42 denotes a radius of curvature of an image-side surface of the fourth lens element. The lens has the advantages that the reasonable focal power ratio of the third lens and the surface shape of the fourth lens are set, so that the light trend is stable, the deflection angle of marginal light is reduced, the difficulty in correcting aberration of the subsequent lens is reduced, the imaging area of the lens can be increased, the chromatic aberration of the lens is optimized, and the imaging quality is improved.
In some embodiments, the optical lens satisfies the following conditional expression:
0.7<f4/f<1；
where f4 denotes a focal length of the fourth lens, and f denotes an effective focal length of the optical lens. The reasonable focal power ratio of the fourth lens is set to alleviate the deflection degree of light passing through the fourth lens, effectively reduce aberration generated by the fourth lens and improve the imaging quality of the optical lens.
In some embodiments, the optical lens satisfies the following conditional expression:
-0.75<f5/f<-0.5；
where f5 denotes a focal length of the fifth lens, and f denotes an effective focal length of the optical lens. The optical power of the fifth lens is reasonably adjusted to be favorable for reducing stray light, and meanwhile, the distortion of a large angle can be effectively converged to improve the overall imaging quality.
In some embodiments, the optical lens satisfies the following conditional expression:
0.5<TTL/IH<0.6；
1<TTL/f<1.3；
Wherein TTL represents the optical total length of the optical lens, IH represents the actual image height of the optical lens, and f represents the effective focal length of the optical lens. The ratio of the total length of the optical lens to the actual image height and the ratio of the total length of the optical lens to the effective focal length are reasonably controlled to meet the above conditional expression, so that the optical lens has a large image surface while meeting miniaturization.
In some embodiments, the optical lens satisfies the following conditional expression:
2.6<IH/FNO<2.8；
where IH represents the actual image height of the optical lens and FNO represents the f-number of the optical lens. The above conditional expression is satisfied, so that enough light can enter the lens, the reasonable balance between the large light flux and the large imaging surface of the lens can be better realized, and the imaging quality can be improved.
In some embodiments, the optical lens satisfies the following conditional expression:
-5.5<R51/R52<-2.8；
Where R51 represents a radius of curvature of the object side surface of the fifth lens, and R52 represents a radius of curvature of the image side surface of the fifth lens. The above conditional expression is satisfied, and the generation of stray light is reduced by reasonably adjusting the fifth lens surface, so that the large-angle distortion can be effectively converged, and the overall imaging quality is improved.
In some embodiments, the optical lens satisfies the following conditional expression:
1.55<(R41+R42)/(R41-R42)<2.25；
Where R41 represents a radius of curvature of the object side surface of the fourth lens, and R42 represents a radius of curvature of the image side surface of the fourth lens. The above conditional expression is satisfied, so that the distortion generated by the fourth lens can be reduced, the requirement of the subsequent lens on distortion correction is reduced, and the imaging quality of the optical lens is improved.
In some embodiments, the optical lens satisfies the following conditional expression:
0.5<(R51+R52)/(R51-R52)<0.7；
Where R51 represents a radius of curvature of the object side surface of the fifth lens, and R52 represents a radius of curvature of the image side surface of the fifth lens. The condition is satisfied, the edge view field beam trend can be controlled to increase the image height, and meanwhile, the off-axis aberration of the optical lens is reduced.
In some embodiments, the optical lens satisfies the following conditional expression:
0.6<f/R31<0.8；
0.7<f/R32<0.8；
where f denotes an effective focal length of the optical lens, R31 denotes a radius of curvature of an object side surface of the third lens, and R32 denotes a radius of curvature of an image side surface of the third lens. The above conditional expression is satisfied, which is favorable for correcting the aberration of the optical lens and improving the imaging quality.
In some embodiments, the optical lens satisfies the following conditional expression:
-0.9<f/R41<-0.5；
where f denotes an effective focal length of the optical lens, and R41 denotes a radius of curvature of the object side surface of the fourth lens. The method meets the above conditional expression, is favorable for correcting chromatic aberration of the optical lens and improves imaging quality.
In some embodiments, the optical lens satisfies the following conditional expression:
-0.8<f/R51<-0.5；
1.9<f/R52<2.6；
where f denotes an effective focal length of the optical lens, R51 denotes a radius of curvature of an object side surface of the fifth lens, and R52 denotes a radius of curvature of an image side surface of the fifth lens. The above conditional expression is satisfied, which is favorable for correcting the aberration of the optical lens and improving the imaging quality of the optical lens.
In some embodiments, the optical lens satisfies the following conditional expression:
3.8<DM5/DM1<4.1；
where DM5 represents the mechanical aperture of the fifth lens and DM1 represents the mechanical aperture of the first lens. The optical lens has smaller head size, thereby being beneficial to shortening the total optical length of the optical lens and improving the screen occupation ratio.
In some embodiments, the optical lens satisfies the following conditional expression:
-0.28<(Nd1/Vd1)×f2<-0.25；
Where Nd1 denotes a refractive index of a material of the first lens, vd1 denotes an abbe number of the material of the first lens, and f2 denotes a focal length of the second lens. The above conditional expression is satisfied, and the total length of the optical lens is effectively shortened while the lens has ultra-high pixels by reasonably selecting the material of the first lens. And the negative image difference generated by the first lens is properly balanced through the negative focal power of the second lens, so that the aberration of the optical system can be corrected, the imaging quality can be improved, and the miniaturization of the system can be maintained.
In some embodiments, the optical lens satisfies the following conditional expression:
0.02<(CV21-CV22)/f2×Nd2<0.03；
Where CV21 represents the curvature of the object side surface of the second lens, CV22 represents the curvature of the image side surface of the second lens, f2 represents the focal length of the second lens, and Nd2 represents the refractive index of the material of the second lens. The material and the surface shape of the second lens are reasonably arranged, so that off-axis aberration can be corrected, light entering the second lens can have proper incidence and emergent angles, the area of an imaging surface can be increased, the outer diameter of a lens at the front end of the lens can be reduced, and the miniaturization of the system can be maintained.
In some embodiments, the optical lens satisfies the following conditional expression:
0.49<Y52/(IH/2)<0.57；
wherein IH represents the actual image height of the optical lens, Y52 represents the vertical distance between the inflection point on the image side of the fifth lens and the optical axis, and a specific schematic view is shown in FIG. 13. The optical lens is provided with an inflection point on the image side surface of the fifth lens. And the condition is satisfied, and the position of the inflection point on the image side surface of the fifth lens is reasonably set, so that the coma correction of the off-axis visual field is enhanced, and the imaging quality is improved.
In some embodiments, the optical lens satisfies the following conditional expression:
0.04<(IH/2)-f×tan(FOV/2)<0.15；
Where IH represents the actual image height of the optical lens, f represents the effective focal length of the optical lens, and FOV represents the full field angle of the optical lens. The above conditional expression is satisfied, which indicates that the system distortion of the optical lens is well suppressed on the premise of having a large field angle. If the value of (IH/2) -f multiplied by tan (FOV/2) exceeds the lower limit, the optical imaging system has larger negative distortion, the shooting pattern can be obviously deformed and barrel-shaped, and the imaging effect is affected; if the value of (IH/2) -f×tan (FOV/2) exceeds the upper limit, the optical imaging system has larger positive distortion, the shooting pattern can be obviously deformed and pillow-shaped, and the imaging effect is affected.
In some embodiments, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens may all be glass lenses or all be plastic lenses, or may also be a combination of plastic lenses and glass lenses.
In some embodiments, the first lens, the second lens, the third lens, the fourth lens and the fifth lens are all plastic aspherical lenses. By adopting the aspheric lens, the optical lens has better imaging quality, more compact structure and shorter total optical length.
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, the aspherical profile of each lens satisfies the following equation:
；
Where z is the distance sagittal height from the aspherical surface vertex when the aspherical surface is at a position of height h in the optical axis direction, c is the paraxial curvature of the surface, k is a quadric surface coefficient, and a 2i is an aspherical surface type coefficient of 2 i-th order.
First embodiment
Referring to fig. 1 for a schematic structural diagram of an optical lens 100 according to a first embodiment of the present invention, the optical lens 100 includes, in order from an object side to an imaging surface S13 along an optical axis: stop ST, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, and filter G1.
The first lens element L1 is a plastic aspheric lens with positive refractive power, wherein an object-side surface S1 of the first lens element is convex at a paraxial region thereof, and an image-side surface S2 of the first lens element is concave at a paraxial region thereof;
the second lens element L2 is a plastic aspheric lens with negative refractive power, wherein an object-side surface S3 of the second lens element is concave at a paraxial region thereof, and an image-side surface S4 of the second lens element is concave at a paraxial region thereof;
the third lens element L3 with a negative refractive power is a plastic aspheric lens, wherein an object-side surface S5 of the third lens element is convex at a paraxial region thereof, and an image-side surface S6 of the third lens element is concave at a paraxial region thereof;
The fourth lens element L4 is a plastic aspheric lens with positive refractive power, wherein an object-side surface S7 of the fourth lens element is concave at a paraxial region thereof, and an image-side surface S8 of the fourth lens element is convex at a paraxial region thereof;
The fifth lens element L5 is a plastic aspheric lens with negative refractive power, wherein an object-side surface S9 of the fifth lens element is concave at a paraxial region thereof, and an image-side surface S10 of the fifth lens element is concave at a paraxial region thereof.
The object side surface of the filter G1 is S11, and the image side surface is S12.
The relevant parameters of each lens in the optical lens 100 provided in this embodiment are shown in table 1, where R represents a radius of curvature (unit: mm), d represents an optical surface pitch (unit: mm), n d represents a d-line refractive index of the material, and V d represents an abbe number of the material.
TABLE 1
The surface profile coefficients of the aspherical surfaces of the optical lens 100 in this embodiment are shown in table 2.
TABLE 2
In this embodiment, the graphs of the F-Tan θ distortion, the axial aberration and the vertical chromatic aberration of the optical lens 100 are shown in fig. 2, 3 and 4, respectively, and as can be seen from fig. 2 to 4, the optical distortion is controlled within ±2%, the axial chromatic aberration of the minimum wavelength and the maximum wavelength is controlled within ±0.04mm, and the chromatic aberration of each wavelength relative to the center wavelength within 0 to 0.9 normalized field angle is controlled within ±0.5 μm, which means that the distortion, the aberration and the chromatic aberration of the optical lens 100 are well corrected.
Second embodiment
Referring to fig. 5 for a schematic structural diagram of an optical lens 200 according to the present embodiment, the optical lens 200 in the present embodiment has substantially the same structural shape as the optical lens 100 in the first embodiment, and the materials are identical, but the center thickness, the edge thickness, etc. of each lens are changed.
The relevant parameters of each lens in the optical lens 200 provided in this embodiment are shown in table 3.
TABLE 3 Table 3
The surface profile coefficients of the aspherical surfaces of the optical lens 200 in this embodiment are shown in table 4.
TABLE 4 Table 4
In this embodiment, the graphs of F-Tan θ distortion, axial aberration and vertical chromatic aberration of the optical lens 200 are shown in fig. 6,7 and 8, respectively, and it can be seen from fig. 6 to 8 that the optical distortion is controlled within ±1.6%, the axial chromatic aberration of the minimum wavelength and the maximum wavelength is controlled within ±0.04mm, and the chromatic aberration of each wavelength in the 0-0.9 normalized field angle relative to the center wavelength is controlled within ±1 micron, which means that the distortion, aberration and chromatic aberration of the optical lens 200 are well corrected.
Third embodiment
Referring to fig. 9, the optical lens 300 of the present embodiment has substantially the same structural shape as the optical lens 100 of the first embodiment, but the material of the third lens is slightly different, and the center thickness, the edge thickness, etc. of each lens are also changed.
The relevant parameters of each lens in the optical lens 300 in this embodiment are shown in table 5.
TABLE 5
The surface profile coefficients of the aspherical surfaces of the optical lens 300 in this embodiment are shown in table 6.
TABLE 6
In this embodiment, the graphs of F-Tan θ distortion, axial aberration and vertical chromatic aberration of the optical lens 300 are shown in fig. 10, 11 and 12, respectively, and as can be seen from fig. 10 to 12, the optical distortion is controlled within ±2%, the axial chromatic aberration of the minimum wavelength and the maximum wavelength is controlled within ±0.035mm, and the chromatic aberration of each wavelength relative to the center wavelength within 0 to 0.9 normalized field angle is controlled within ±1 micron, which means that the distortion, aberration and chromatic aberration of the optical lens 300 are well corrected.
Table 7 is an optical characteristic corresponding to the above three embodiments, and mainly includes an optical total length TTL of the optical lens of each embodiment, an actual image height IH, an effective focal length f, a full field angle FOV, an f-number FNO, and a numerical value corresponding to each of the above conditional expressions.
TABLE 7
In summary, the optical lens provided in the present embodiment has at least the following advantages:
(1) The optical lens provided by the invention adopts five lenses with specific surface shapes for collocation and reasonable focal power distribution, so that the optical lens has the advantages of small head, large visual angle, small volume, small chromatic aberration and the like.
(2) The optical lens provided by the invention has a wider visual angle range and a larger depth of field, can effectively ensure that front and rear sceneries of a shot main body can be clearly reproduced on a picture, has strong front and rear feeling of the shot main body, has perspective effect and can enhance the infectivity of the picture.
(3) The optical lens provided by the invention has smaller chromatic aberration, is favorable for improving imaging quality, and can bring better visual experience to consumers.
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 foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the 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 protection of the present invention is to be determined by the appended claims.
Claims (9)
1. An optical lens comprising five lenses in order from an object side to an imaging surface along an optical axis, comprising:
a first lens element with positive refractive power having a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region;
a second lens having negative optical power, the object-side surface and the image-side surface of which are concave at a paraxial region;
a third lens element with negative refractive power having a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region;
a fourth lens element with positive refractive power having a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region;
A fifth lens element with negative refractive power having concave object-side and image-side surfaces at paraxial regions;
Wherein, the optical lens satisfies the following conditional expression:
f3/f<-15；
2.8<R41/R42<4.6；
0.6<f/R31<0.8；
0.7<f/R32<0.8；
Wherein f3 denotes a focal length of the third lens element, f denotes an effective focal length of the optical lens element, R41 denotes a radius of curvature of an object-side surface of the fourth lens element, R42 denotes a radius of curvature of an image-side surface of the fourth lens element, R31 denotes a radius of curvature of an object-side surface of the third lens element, and R32 denotes a radius of curvature of an image-side surface of the third lens element.
2. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
-5.5<R51/R52<-2.8；
Where R51 represents a radius of curvature of the object side surface of the fifth lens, and R52 represents a radius of curvature of the image side surface of the fifth lens.
3. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
1.55<(R41+R42)/(R41-R42)<2.25；
where R41 represents a radius of curvature of the object side surface of the fourth lens, and R42 represents a radius of curvature of the image side surface of the fourth lens.
4. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
-3.3<f2/f<-2.7；
-10<R21/R22<-0.2；
wherein f2 represents a focal length of the second lens, f represents an effective focal length of the optical lens, R21 represents a radius of curvature of an object side surface of the second lens, and R22 represents a radius of curvature of an image side surface of the second lens.
5. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
0.5<TTL/IH<0.6；
1<TTL/f<1.3；
Wherein TTL represents the total optical length of the optical lens, IH represents the actual image height of the optical lens, and f represents the effective focal length of the optical lens.
6. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
3.8<DM5/DM1<4.1；
wherein DM5 represents the mechanical aperture of the fifth lens, and DM1 represents the mechanical aperture of the first lens.
7. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
-0.28<(Nd1/Vd1)×f2<-0.25；
wherein Nd1 represents a material refractive index of the first lens, vd1 represents an abbe number of the material of the first lens, and f2 represents a focal length of the second lens.
8. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
0.02<(CV21-CV22)/f2×Nd2<0.03；
wherein CV21 represents the curvature of the object side surface of the second lens, CV22 represents the curvature of the image side surface of the second lens, f2 represents the focal length of the second lens, and Nd2 represents the refractive index of the material of the second lens.
9. The optical lens according to claim 1, wherein the optical lens satisfies the following conditional expression:
0.49<Y52/(IH/2)<0.57；
Wherein Y52 represents the vertical distance between the inflection point on the image side of the fifth lens element and the optical axis, and IH represents the actual image height of the optical lens element.
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| CN202410112853.8A CN117631224B (en) | 2024-01-26 | 2024-01-26 | Optical lens |
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| CN202410112853.8A CN117631224B (en) | 2024-01-26 | 2024-01-26 | Optical lens |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014197105A (en) * | 2013-03-29 | 2014-10-16 | 富士フイルム株式会社 | Imaging lens and imaging apparatus including the imaging lens |
| CN107167900A (en) * | 2017-07-25 | 2017-09-15 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN114236754A (en) * | 2018-12-24 | 2022-03-25 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN116859565A (en) * | 2023-09-05 | 2023-10-10 | 江西联益光学有限公司 | Optical lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111929825B (en) * | 2020-09-03 | 2022-07-12 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014197105A (en) * | 2013-03-29 | 2014-10-16 | 富士フイルム株式会社 | Imaging lens and imaging apparatus including the imaging lens |
| CN107167900A (en) * | 2017-07-25 | 2017-09-15 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN114236754A (en) * | 2018-12-24 | 2022-03-25 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN116859565A (en) * | 2023-09-05 | 2023-10-10 | 江西联益光学有限公司 | Optical lens |
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