CN117348200A - Optical lens - Google Patents
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- CN117348200A CN117348200A CN202311653017.2A CN202311653017A CN117348200A CN 117348200 A CN117348200 A CN 117348200A CN 202311653017 A CN202311653017 A CN 202311653017A CN 117348200 A CN117348200 A CN 117348200A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 171
- 238000003384 imaging method Methods 0.000 claims abstract description 27
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- 230000004075 alteration Effects 0.000 description 38
- 238000010586 diagram Methods 0.000 description 12
- 239000011521 glass Substances 0.000 description 10
- 238000002834 transmittance Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
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- 238000012634 optical imaging Methods 0.000 description 4
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Classifications
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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
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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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 image side surface of which is concave; the second lens with negative focal power has a concave object side surface and a concave image side surface; a third lens having positive optical power, the image side surface of which is convex; a diaphragm; a fourth lens with positive focal power, the object side surface of which is a convex surface; a fifth lens with negative focal power, the object side surface of which is a concave 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 effective focal length f of the optical lens and the maximum half field angle FOV of the optical lens satisfy: 8.0mm < F×tan (FOV) < 9.0mm. The optical lens provided by the invention has the advantages of at least small size, large field angle, large image plane and high pixel.
Description
Technical Field
The invention relates to the technical field of imaging lenses, in particular to an optical lens.
Background
With the continuous upgrading and updating of smart phones, consumers have higher requirements on the shooting function of the mobile phones, and the ultra-high pixel, large aperture and wide angle shooting become the main development trend of mobile phone lenses. In order to pursue high-quality imaging, currently, all plastic lenses are mostly adopted in the main-stream mobile phone lens, and the number of lenses is increased from 5-6 lenses to 7-8 lenses for correcting the optical path, but the lenses are limited by factors such as light and thin mobile phones, light transmittance of the plastic lenses, assembly precision and the like, the number of the plastic lenses is difficult to further increase, and the all plastic lenses meet the bottleneck period. The glass lens has better light transmittance and smaller chromatic dispersion, can effectively correct chromatic aberration and shorten the total length of the system, so that the glass-plastic mixed lens combining the advantages of the glass lens and the plastic lens can effectively reduce the total length of the lens and correct the chromatic aberration of the system, and improve the light inlet quantity and imaging definition of the optical lens, is widely applied to equipment such as security monitoring, digital cameras, single-lens reflex cameras and the like, and is hopeful to be applied to high-end flagship type main shooting.
Compared with a full plastic lens, the glass-plastic mixed lens has higher light transmittance and more stable performance, can improve imaging effects under different shades, and is a development trend of future mobile phone lenses. However, how to better achieve large field angle, large target surface imaging, high pixel and small size performance of the lens remains an urgent issue to be resolved.
Disclosure of Invention
Therefore, the present invention is directed to an optical lens having at least the advantages of small size, large field angle, large target surface imaging, and high pixels.
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 image side surface of which is concave; the second lens with negative focal power has a concave object side surface and a concave image side surface; a third lens having positive optical power, the image side surface of which is convex; a diaphragm; a fourth lens with positive focal power, the object side surface of which is a convex surface; a fifth lens with negative focal power, the object side surface of which is a concave 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 effective focal length f of the optical lens and the maximum half field angle FOV of the optical lens satisfy: 8.0mm < F×tan (FOV) < 9.0mm.
Compared with the prior art, the optical lens provided by the invention has the advantages that through specific surface shape arrangement and reasonable focal power distribution, particularly the second lens and the fifth lens adopt negative focal power, so that the optical lens is compact in structure, has a large aperture and high imaging quality, can be matched with a large target chip to realize high-definition imaging, and better meets the use requirements of miniaturization, high image quality and wide-angle shooting of electronic equipment.
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 showing a field curvature of an optical lens according to a first embodiment of the present invention.
Fig. 3 is an axial chromatic 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 of an optical lens according to a first embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an optical lens according to a second embodiment of the present invention.
Fig. 6 is a field curvature chart of an optical lens according to a second embodiment of the present invention.
Fig. 7 is an axial chromatic aberration diagram of an optical lens according to a second embodiment of the present invention.
Fig. 8 is a vertical axis chromatic aberration diagram of an optical lens according to a second embodiment of the present invention.
Fig. 9 is a schematic structural diagram of an optical lens according to a third embodiment of the present invention.
Fig. 10 is a field curve diagram of an optical lens according to a third embodiment of the present invention.
Fig. 11 is an axial chromatic aberration diagram of an optical lens in a third embodiment of the invention.
Fig. 12 is a vertical axis chromatic aberration diagram of an optical lens according to a third 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 third lens, the diaphragm, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the optical filter are positioned on the same straight line.
Specifically, the first lens element has negative refractive power, wherein an object-side surface of the first lens element is concave or convex at a paraxial region thereof, and an image-side surface of the first lens element is concave; the second lens has negative focal power, the object side surface of the second lens is a concave 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 at the paraxial region, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; 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 or a concave surface at a paraxial region; 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, the effective focal length f of the optical lens and the maximum half field angle FOV of the optical lens satisfy: 8.0mm < F×tan (FOV) < 9.0mm. The method meets the above conditional expression, and is favorable for realizing the balance of the large field angle and the large target surface imaging of the optical lens by reasonably limiting the field angle and the focal length of the optical lens.
In some embodiments, the maximum half field angle FOV of the optical lens, the image height IH corresponding to the maximum half field angle of the optical lens, and the effective focal length f of the optical lens satisfy: 110 DEG < FOV x IH/f < 140 deg. The above conditional expression is satisfied, and the relationship among the focal length, the field angle and the image height of the optical lens is reasonably limited, so that the optical lens can realize large target surface imaging when shooting at a large angle.
In some embodiments, the total optical length TTL of the optical lens and the image height IH corresponding to the maximum half field angle of the optical lens satisfy: 1.5 < TTL/IH < 2.2. The method meets the above conditional expression, and can realize large target surface imaging and shorten the optical total length at the same time by reasonably limiting the ratio of the optical total length to the image height of the optical lens, realize the balance of miniaturization of the optical lens and large target surface imaging, and improve the market competitiveness.
In some embodiments, the effective focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: -4.5 < f1/f < -2.8. The optical lens has the advantages that the focal length of the first lens is reasonably adjusted, so that light entering the first lens can be well converged and enter the optical system, meanwhile, the correction difficulty of aberration is reduced, and the imaging quality of the optical lens is guaranteed.
In some embodiments, the effective focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: -2.5 < f2/f < -1.5; the radius of curvature R21 of the object-side surface of the second lens and the radius of curvature R22 of the image-side surface of the second lens satisfy: -1.0 < (R21+R22)/(R21-R22) < 0. The optical lens meets the above conditional expression, and by reasonably setting the focal length and the surface shape of the second lens, the incidence inclination angle of light entering the optical lens is reduced, the correction difficulty of edge aberration is reduced, and the imaging quality of the optical lens is ensured.
In some embodiments, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, and the effective focal length f of the optical lens satisfy: 2.0 < (f3+f4)/f < 3.0; the center thickness CT3 of the third lens, the center thickness CT4 of the fourth lens, the air interval CT34 of the third lens and the fourth lens on the optical axis, and the total optical length TTL of the optical lens satisfy: 0.3 < (CT3+CT4+CT34)/TTL < 0.6. The optical lens has compact structure, and the emergent light can be transmitted to the following optical system more smoothly, so that the aberration of the optical lens is further improved, 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 f6 of the sixth lens satisfy: 0.8 < f4/f6 < 1.2. The focal length ratio of the fourth lens and the sixth lens is reasonably limited by meeting the above conditional expression, so that the eccentric sensitivity of the fourth lens and the sixth lens is balanced, the improvement space of the optical lens is increased, and the imaging quality of the optical lens is improved.
In some embodiments, the effective focal length f6 of the sixth lens and the effective focal length f of the optical lens satisfy: f6/f is more than 1.0 and less than 1.5; the radius of curvature R61 of the object-side surface of the sixth lens and the radius of curvature R62 of the image-side surface of the sixth lens satisfy: 0.7 < (R61+R62)/(R61-R62) < 1.5. The above conditional expression is satisfied, and the focal length and the surface shape of the sixth lens are reasonably adjusted, so that the shape change of the sixth lens can be slowed down, the stray light is reduced, meanwhile, the aberration of the marginal view field can be effectively improved, and the overall imaging quality of the optical lens is improved.
In some embodiments, the center thickness CT5 of the fifth lens, the air space CT56 of the fifth lens and the sixth lens on the optical axis, and the total optical length TTL of the optical lens satisfy: 0.20 < (CT5+CT56)/TTL < 0.32. The spherical aberration of the optical lens can be effectively corrected by reasonably controlling the center thickness of the fifth lens and the air interval between the fifth lens and the sixth lens, the image quality of the optical lens is improved, and the imaging quality of the optical lens is improved.
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 less than 0.35 and less than 0.45. The optical lens can have longer optical back focus and is beneficial to the assembly of the optical lens by meeting the above conditional expression.
In some embodiments, the optical total length TTL of the optical lens and the effective focal length f of the optical lens satisfy: TTL/f is less than 3.0 and less than 4.0. The above conditional expression is satisfied, and miniaturization of the optical lens and reasonable balance of high pixels can be better realized.
In some embodiments, the effective focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: f4/f is more than 1.2 and less than 1.4; the radius of curvature R41 of the fourth lens object-side surface and the radius of curvature R42 of the fourth lens image-side surface satisfy: -1.0 < R41/R42 < -3.0. The focal length and the surface shape of the fourth lens are reasonably controlled to reduce the correction difficulty of the aberration of the edge field of view, so that the imaging quality of the optical lens is improved.
As an implementation mode, the glass-plastic mixed matching structure of one glass lens and six plastic lenses is adopted, so that the optical lens can be better matched with a large target surface chip to realize high-definition imaging, and meanwhile, the reasonable balance of high pixels, miniaturization and wide viewing angle of the optical lens can be realized. The third lens is a glass aspheric lens, and the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are plastic aspheric lenses; the glass lens is adopted, so that the geometrical chromatic aberration of the optical lens can be effectively corrected, and the problems of glare, ghost images and the like are reduced; by adopting the aspheric lens, the cost can be effectively reduced, the aberration can be corrected, and an optical performance product with higher cost performance can be provided.
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 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 the quadric coefficient, 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: the first lens L1, the second lens L2, the third lens L3, the stop ST, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the filter G1.
Specifically, 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 thereof, 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 concave surface, and the image side surface S4 of the second lens is a concave surface; the third lens element L3 with positive refractive power has a convex object-side surface S5 at a paraxial region and a convex image-side surface S6; the fourth lens element L4 has positive refractive power, wherein an object-side surface S7 of the fourth lens element is convex, 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 at a paraxial region; 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 third lens L3 is a glass aspheric lens, and the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 are plastic aspheric lenses.
Specifically, the design parameters of each lens of the optical lens 100 provided in this embodiment are shown in table 1.
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
Referring to fig. 2, 3 and 4, a field curvature curve, an axial chromatic aberration curve and a vertical chromatic aberration curve of the optical lens 100 are shown. As can be seen from fig. 2, the curvature of field is controlled within ±0.1mm, which indicates that the curvature of field of the optical lens 100 is well corrected; as can be seen from fig. 3, the offset of the axial chromatic aberration is within ±0.05mm, which indicates that the axial chromatic aberration of the optical lens 100 is well corrected; as can be seen from fig. 4, the vertical axis chromatic aberration of the shortest wave and the longest wave within the 0.8 field of view is controlled within ±4μm, which means that the vertical axis chromatic aberration of the optical lens 100 is well corrected; as can be seen from fig. 2, 3 and 4, the aberration of the optical lens 100 is well balanced, and good optical imaging quality is achieved.
Second embodiment
Referring to fig. 5, 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 of the present embodiment is substantially the same as the first embodiment.
Specifically, the design parameters of each lens of 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
Referring to fig. 6, 7 and 8, a field curvature curve, an axial chromatic aberration curve and a vertical chromatic aberration curve of the optical lens 200 are shown. As can be seen from fig. 6, the curvature of field is controlled within ±0.1mm, which indicates that the curvature of field of the optical lens 200 is well corrected; as can be seen from fig. 7, the offset of the axial chromatic aberration is within ±0.04mm, which indicates that the axial chromatic aberration of the optical lens 200 is well corrected; as can be seen from fig. 8, the vertical axis chromatic aberration of the shortest wave and the longest wave within the 0.8 field of view is controlled within ±3 μm, which means that the vertical axis chromatic aberration of the optical lens 200 is well corrected; as can be seen from fig. 6, 7 and 8, the aberration of the optical lens 200 is well balanced, and has good optical imaging quality.
Third embodiment
Referring to fig. 9, a schematic diagram of an optical lens 300 according to a third embodiment of the present invention is shown, and the optical lens 300 of the present embodiment is substantially the same as the first embodiment.
Specifically, the design parameters of each lens of the optical lens 300 provided 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
Referring to fig. 10, 11 and 12, a field curvature curve, an axial chromatic aberration curve and a vertical chromatic aberration curve of the optical lens 300 are shown. As can be seen from fig. 10, the curvature of field is controlled within ±0.08mm, which indicates that the curvature of field of the optical lens 300 is well corrected; as can be seen from fig. 11, the axial chromatic aberration is within ±0.05mm, which indicates that the axial chromatic aberration of the optical lens 300 is well corrected; as can be seen from fig. 12, the vertical axis chromatic aberration of the shortest wave and the longest wave within the 0.8 field of view is controlled within ±4μm, which means that the vertical axis chromatic aberration of the optical lens 300 is well corrected; as can be seen from fig. 10, 11 and 12, the aberrations of the optical lens 300 are well balanced, and have good optical imaging quality.
Referring to table 7, the optical characteristics of the optical lens provided in the above three embodiments, including the maximum half field angle FOV, the total optical length TTL, the half image height IH, the effective focal length f, the aperture value FNO, and the correlation values corresponding to each of the above conditions, are shown.
TABLE 7
Compared with the prior art, the glass-plastic mixed optical lens provided by the invention has at least the following advantages:
(1) The balance between high pixel and miniaturization can be realized. Because the glass has better light transmittance and lower dispersion coefficient, the optical lens provided by the invention adopts one glass lens and six plastic lenses, the optical quality of the optical lens is basically consistent with that of the currently mainstream 8 plastic lenses, the light transmittance and the optical performance are more excellent, and the high-pixel and miniaturized balance of the optical lens is realized.
(2) More layers of coating optimization can be realized. At present, a high-temperature process is mostly adopted for coating the plastic lens, and the plastic lens is more likely to deform under the process, so that the yield is lower, and the coating is usually not more than 5 layers; the glass lens has strong high temperature resistance, can realize that more layers of coating films are used for controlling reflection and dazzling light, and further improves the optical imaging quality.
In summary, the optical lens provided by the invention adopts seven glass-plastic mixed lenses, and the optical lens has a compact structure and a longer focal length and higher imaging quality through specific surface shape arrangement and reasonable focal power distribution, and can be matched with a 50M high-pixel chip to realize high-definition imaging; meanwhile, through reasonably selecting the glass material of the third lens and adding the use of the aspheric surface, the whole aberration of the optical lens can be reasonably corrected, so that the optical lens has high pixels, the whole length of the optical lens is effectively shortened, and the use requirements of miniaturization and high image quality of electronic equipment are better met.
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 (10)
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 image side surface of the first lens being a concave surface;
a second lens with negative focal power, wherein the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface;
a third lens having positive optical power, an image side surface of the third lens being a convex surface;
a diaphragm;
a fourth lens with positive focal power, wherein the object side surface of the fourth lens is a convex surface;
a fifth lens with negative focal power, wherein the object side surface of the fifth lens is a concave 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 effective focal length f of the optical lens and the maximum half field angle FOV of the optical lens satisfy: 8.0mm < F×tan (FOV) < 9.0mm.
2. The optical lens of claim 1, wherein a maximum half field angle FOV of the optical lens, an image height IH corresponding to the maximum half field angle of the optical lens, and an effective focal length f of the optical lens satisfy: 110 DEG < FOV x IH/f < 140 deg.
3. The optical lens of claim 1, wherein an optical total length TTL of the optical lens and an image height IH corresponding to a maximum half field angle of the optical lens satisfy: 1.5 < TTL/IH < 2.2.
4. The optical lens of claim 1, wherein an effective focal length f1 of the first lens and an effective focal length f of the optical lens satisfy: -4.5 < f1/f < -2.8.
5. The optical lens of claim 1, wherein an effective focal length f2 of the second lens and an effective focal length f of the optical lens satisfy: -2.5 < f2/f < -1.5.
6. The optical lens of claim 1, wherein an effective focal length f3 of the third lens, an effective focal length f4 of the fourth lens, and an effective focal length f of the optical lens satisfy: 2.0 < (f3+f4)/f < 3.0.
7. The optical lens of claim 1, wherein an effective focal length f4 of the fourth lens and an effective focal length f6 of the sixth lens satisfy: 0.8 < f4/f6 < 1.2.
8. The optical lens of claim 1, wherein an effective focal length f6 of the sixth lens and an effective focal length f of the optical lens satisfy: f6/f is more than 1.0 and less than 1.5; the radius of curvature R61 of the object-side surface of the sixth lens and the radius of curvature R62 of the image-side surface of the sixth lens satisfy: 0.7 < (R61+R62)/(R61-R62) < 1.5.
9. The optical lens of claim 1, wherein a center thickness CT5 of the fifth lens, an air interval CT56 of the fifth lens and the sixth lens on an optical axis, and an optical total length TTL of the optical lens satisfy: 0.20 < (CT5+CT56)/TTL < 0.32.
10. The optical lens according to claim 1, wherein an optical back focal length BFL of the optical lens and an effective focal length f of the optical lens satisfy: BFL/f is less than 0.35 and less than 0.45.
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Citations (6)
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| JP2021189381A (en) * | 2020-06-03 | 2021-12-13 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドSz Dji Technology Co., Ltd | Lens system, imaging apparatus and movable body |
| CN218213598U (en) * | 2022-09-30 | 2023-01-03 | 宁波锦辉光学科技有限公司 | Vehicle-mounted lens |
| CN116027519A (en) * | 2023-03-29 | 2023-04-28 | 江西联益光学有限公司 | Optical lens |
| CN117031697A (en) * | 2023-10-08 | 2023-11-10 | 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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| JP2016194653A (en) * | 2015-04-01 | 2016-11-17 | 日精テクノロジー株式会社 | Imaging optical system and imaging device having the same |
| CN106199922A (en) * | 2016-07-13 | 2016-12-07 | 浙江舜宇光学有限公司 | Seven chip wide-angle lens |
| JP2021189381A (en) * | 2020-06-03 | 2021-12-13 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドSz Dji Technology Co., Ltd | Lens system, imaging apparatus and movable body |
| CN218213598U (en) * | 2022-09-30 | 2023-01-03 | 宁波锦辉光学科技有限公司 | Vehicle-mounted lens |
| CN116027519A (en) * | 2023-03-29 | 2023-04-28 | 江西联益光学有限公司 | Optical lens |
| CN117031697A (en) * | 2023-10-08 | 2023-11-10 | 江西联益光学有限公司 | Optical lens |
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| CN117348200B (en) | 2024-03-26 |
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