CN109298513B - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN109298513B
CN109298513B CN201811475404.0A CN201811475404A CN109298513B CN 109298513 B CN109298513 B CN 109298513B CN 201811475404 A CN201811475404 A CN 201811475404A CN 109298513 B CN109298513 B CN 109298513B
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lens
optical imaging
optical
imaging lens
focal length
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CN109298513A (en
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胡亚斌
王馨
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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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
    • 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
    • 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The application discloses an optical imaging lens, which sequentially comprises the following components from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens has negative focal power, and the image side surface of the first lens is a concave surface; the second lens has optical power; the third lens has positive focal power, and the image side surface of the third lens is a convex surface; the fourth lens has optical power; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the object side surface of the sixth lens is concave. The interval distance T56 between the fifth lens and the sixth lens on the optical axis, the interval distance T34 between the third lens and the fourth lens on the optical axis and the interval distance T45 between the fourth lens and the fifth lens on the optical axis satisfy that T56/(T34+T45)/6 is less than or equal to 3.0.

Description

Optical imaging lens
Technical Field
The present application relates to an optical imaging lens, and more particularly, to an optical imaging lens including six lenses.
Background
With the development of science and technology, portable electronic products are gradually rising, and portable electronic products with a camera shooting function are more favored by people, so that the market demand for imaging lenses suitable for the portable electronic products is gradually increasing. On the one hand, since portable electronic products such as smartphones tend to be miniaturized, the total length of the lens is limited, thereby increasing the difficulty in designing the lens. On the other hand, with the improvement of the performance and the reduction of the size of the common photosensitive element such as the photosensitive coupling element (CCD) or the Complementary Metal Oxide Semiconductor (CMOS), the pixel number and the pixel size of the photosensitive element are increased and reduced, so that the requirements for high imaging quality and miniaturization of the matched imaging lens are raised.
In recent years, with the proposal of the dual-shot concept, the method of combining two optical imaging lenses with different focal lengths with an image processing algorithm is increasingly used to realize optical zooming. In general, a double-shot lens needs to be equipped with a single wide-angle lens having a large angle of view and a large depth of field. When the sensor image surfaces are the same in size, the larger the full field angle of the optical imaging lens is, the more information the photographed picture contains. However, the existing wide-angle lens with good imaging quality generally has a longer total optical length, and cannot meet the trend of light and thin portable electronic products. How to achieve miniaturization, wide angle and high imaging quality is a problem to be solved.
Disclosure of Invention
The present application provides an optical imaging lens applicable to portable electronic products, which at least solves or partially solves at least one of the above-mentioned drawbacks of the prior art.
In one aspect, the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens may have negative optical power, and an image side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power, and an image side surface thereof may be convex; the fourth lens has optical power; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an object side surface thereof may be concave. The interval distance T56 between the fifth lens and the sixth lens on the optical axis, the interval distance T34 between the third lens and the fourth lens on the optical axis and the interval distance T45 between the fourth lens and the fifth lens on the optical axis can satisfy 1.0 < T56/(T34+T45)/6 is less than or equal to 3.0.
In one embodiment, the center thickness CT3 of the third lens element, the center thickness CT4 of the fourth lens element, and the center thickness CT5 of the fifth lens element satisfy 0 < (CT 3+ct4+ct 5)/TTL < 0.5.
In one embodiment, the on-axis distance SAG61 from the intersection of the object-side surface of the sixth lens and the optical axis to the effective radius vertex of the object-side surface of the sixth lens and the on-axis distance SAG12 from the intersection of the image-side surface of the first lens and the optical axis to the effective radius vertex of the image-side surface of the first lens may satisfy-2.5 < SAG61/SAG12 < -1.0.
In one embodiment, the combined focal length f12 of the first lens and the second lens and the effective focal length f1 of the first lens may satisfy 0.5 < f12/f 1.ltoreq.3.0.
In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f3 of the third lens may satisfy 0.5 < f/f3 < 1.5.
In one embodiment, the effective focal length f3 of the third lens and the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis may satisfy 0 < f3/TTL < 0.5.
In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f5 of the fifth lens may satisfy 0.5 < f/f5 < 1.5.
In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f6 of the sixth lens may satisfy-1.5 < f/f6 < -0.5.
In one embodiment, the combined focal length f345 of the third lens, the fourth lens and the fifth lens and the total effective focal length f of the optical imaging lens can satisfy 0.5 < f 345/f.ltoreq.1.0.
In one embodiment, half of the maximum field angle of the optical imaging lens, semi-FOV, may satisfy that Semi-FOV is no less than 60 °.
In one embodiment, the total effective focal length f of the optical imaging lens, a half of the maximum field angle Semi-FOV of the optical imaging lens, and the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis may satisfy 0.5 < f×tan (Semi-FOV)/TTL < 1.0.
In one embodiment, the edge thickness ET6 of the sixth lens and the center thickness CT6 of the sixth lens on the optical axis may satisfy 2.0 < ET6/CT6 < 5.5.
In one embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT61 of the object-side surface of the sixth lens may satisfy 0.5 < DT11/DT61 < 2.0.
In one embodiment, the radius of curvature R6 of the image side of the third lens and the radius of curvature R10 of the image side of the fifth lens may satisfy 0.5 < R6/R10 < 1.5.
In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy f/EPD < 2.2.
In another aspect, the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens may have negative optical power, and an image side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power, and an image side surface thereof may be convex; the fourth lens has optical power; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an object side surface thereof may be concave. The total effective focal length f of the optical imaging lens, half of the Semi-FOV of the maximum field angle of the optical imaging lens, and the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis may satisfy 0.5 < f×tan (Semi-FOV)/TTL < 1.0.
In still another aspect, the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens may have negative optical power, and an image side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power, and an image side surface thereof may be convex; the fourth lens has optical power; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an object side surface thereof may be concave. Wherein an on-axis distance SAG61 from an intersection point of the object side surface of the sixth lens element and the optical axis to an effective radius vertex of the object side surface of the sixth lens element and an on-axis distance SAG12 from an intersection point of the image side surface of the first lens element and the optical axis to an effective radius vertex of the image side surface of the first lens element may satisfy-2.5 < SAG61/SAG12 < -1.0.
In still another aspect, the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens may have negative optical power, and an image side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power, and an image side surface thereof may be convex; the fourth lens has optical power; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an object side surface thereof may be concave. The combined focal length f345 of the third lens, the fourth lens and the fifth lens and the total effective focal length f of the optical imaging lens can meet the condition that f345/f is more than 0.5 and less than or equal to 1.0.
In still another aspect, the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens may have negative optical power, and an image side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power, and an image side surface thereof may be convex; the fourth lens has optical power; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an object side surface thereof may be concave. The thickness ET6 of the edge of the sixth lens and the thickness CT6 of the center of the sixth lens on the optical axis can satisfy 2.0 < ET6/CT6 < 5.5.
In still another aspect, the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens may have negative optical power, and an image side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power, and an image side surface thereof may be convex; the fourth lens has optical power; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an object side surface thereof may be concave. The maximum effective radius DT11 of the object side of the first lens and the maximum effective radius DT61 of the object side of the sixth lens may satisfy 0.5 < DT11/DT61 < 2.0.
In still another aspect, the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens may have negative optical power, and an image side surface thereof may be concave; the second lens has optical power; the third lens may have positive optical power, and an image side surface thereof may be convex; the fourth lens has optical power; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an object side surface thereof may be concave. The total effective focal length f of the optical imaging lens and the effective focal length f6 of the sixth lens can meet the condition that f/f6 is less than-1.5 and less than-0.5.
The application adopts six lenses, and the optical lens group has at least one beneficial effect of miniaturization, wide angle, high imaging quality and the like by reasonably distributing the focal power, the surface type, the center thickness of each lens, the axial spacing among the lenses and the like.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 shows a schematic structural view of an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application;
Fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 4;
Fig. 9 shows a schematic configuration diagram of an optical imaging lens according to embodiment 5 of the present application;
Fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 5;
fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 6;
fig. 13 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 7 of the present application;
Fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of embodiment 7, respectively.
Detailed Description
For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens according to the exemplary embodiment of the present application may include, for example, six lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are sequentially arranged from the object side to the image side along the optical axis. In the first lens to the sixth lens, any adjacent two lenses may have an air space therebetween.
In an exemplary embodiment, the first lens may have negative optical power, and an image side surface thereof may be concave; the second lens has positive optical power or negative optical power; the third lens may have positive optical power, and an image side surface thereof may be convex; the fourth lens has positive focal power or negative focal power; the fifth lens element may have positive refractive power, and an image-side surface thereof may be convex; the sixth lens may have negative optical power, and an object side surface thereof may be concave.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the conditional expression 1.0 < T56/(t34+t45)/6+.3.0, where T56 is the distance between the fifth lens and the sixth lens on the optical axis, T34 is the distance between the third lens and the fourth lens on the optical axis, and T45 is the distance between the fourth lens and the fifth lens on the optical axis. More specifically, T56, T34, and T45 may further satisfy 1.23.ltoreq.T56/(T34+T45)/6.ltoreq.2.98. The third, fourth and fifth lenses form components, the high-low refractive index material lenses are utilized to form an approximate double-gluing structure so as to effectively correct chromatic aberration of magnification of an off-axis visual field, and meanwhile, the sixth lens is used as an independent component to correct off-axis curvature.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the condition 0 < (CT 3+ct4+ct 5)/TTL < 0.5, wherein CT3 is a center thickness of the third lens on the optical axis, CT4 is a center thickness of the fourth lens on the optical axis, and CT5 is a center thickness of the fifth lens on the optical axis. More specifically, CT3, CT4 and CT5 may further satisfy 0.2 < (CT3+CT4+CT5)/TTL < 0.4, for example, 0.25.ltoreq.CT3+CT4+CT5)/TTL.ltoreq.0.32. Under the condition of ensuring thickness processability, the third lens, the fourth lens and the fifth lens are made to have smaller thickness, and the three lenses can bear certain focal power, so that the lens is beneficial to correcting the Petzval field curve, and meanwhile, the on-axis distance TTL from the object side surface of the first lens to the imaging surface is beneficial to shortening, and the lens meets the miniaturization requirement.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the condition-2.5 < SAG61/SAG12 < -1.0, wherein SAG61 is an on-axis distance from an intersection point of an object side surface of the sixth lens and an optical axis to an effective radius vertex of the object side surface of the sixth lens, and SAG12 is an on-axis distance from an intersection point of an image side surface of the first lens and the optical axis to an effective radius vertex of the image side surface of the first lens. More specifically, SAG61 and SAG12 may further satisfy-2.38. Ltoreq.SAG 61/SAG 12. Ltoreq.1.35. The sagittal height of the image side surface of the first lens and the object side surface of the sixth lens is reasonably controlled, and astigmatism in the meridian direction and optical distortion of the lens are corrected.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the conditional expression 0.5 < f 12/f1.ltoreq.3.0, where f12 is a combined focal length of the first lens and the second lens, and f1 is an effective focal length of the first lens. More specifically, f12 and f1 may further satisfy 0.95.ltoreq.f12/f1.ltoreq.2.89. The first lens and the second lens in the optical imaging lens are provided with optical power as components to correct astigmatism in the meridian and arc directions due to a large angle of view.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the conditional expression 0.5 < f 345/f+.1.0, where f345 is a combined focal length of the third lens, the fourth lens, and the fifth lens, and f is a total effective focal length of the optical imaging lens. More specifically, f345 and f may further satisfy 0.77.ltoreq.f345/f.ltoreq.0.99. The third lens to the fifth lens in the optical imaging lens are used as a component for reducing off-axis chromatic aberration and correcting on-axis spherical aberration and off-axis coma aberration.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the conditional expression Semi-FOV being equal to or greater than 60 °, wherein Semi-FOV is half of the maximum field angle of the optical imaging lens. More specifically, the Semi-FOV may further satisfy 60.0.ltoreq.semi-FOV.ltoreq.63.5. The half field angle of the optical imaging lens is controlled to be 60 degrees or more, so that the equivalent focal length of the system is smaller, the wide-angle function of the lens is realized, and the shot picture is wider.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the condition that f/EPD < 2.2, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. More specifically, f and EPD may further satisfy 2.15+.f/EPD < 2.2, e.g., f/epd=2.19. The reciprocal of the relative aperture of the optical imaging lens is smaller than 2.2, so that the sufficient light quantity of the effective light beam of the lens can be ensured, and the signal-to-noise ratio of the optical system can be improved.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the conditional expression 2.0 < ET6/CT6 < 5.5, where ET6 is an edge thickness of the sixth lens and CT6 is a center thickness of the sixth lens on the optical axis. More specifically, ET6 and CT6 may further satisfy 2.34.ltoreq.ET 6/CT 6.ltoreq.5.34. And the thickness ratio of the sixth lens is reasonably controlled to ensure manufacturability of the sixth lens, and the astigmatic quantity of the Petzval field curve and the meridian direction of the system is corrected.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the conditional expression 0.5 < DT11/DT61 < 2.0, wherein DT11 is a maximum effective radius of an object side surface of the first lens and DT61 is a maximum effective radius of an object side surface of the sixth lens. More specifically, DT11 and DT61 may further satisfy 0.63.ltoreq.DT 11/DT 61.ltoreq.1.71. And the effective diameter ranges of the first lens object side surface and the sixth lens object side surface are reasonably controlled, so that the ghost image energy generated by the two surfaces is weakened, and the imaging performance of the system is improved.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the condition 0.5 < f×tan (Semi-FOV)/TTL < 1.0, where f is the total effective focal length of the optical imaging lens, semi-FOV is half of the maximum field angle of the optical imaging lens, and TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis. More specifically, f, semi-FOV and TTL further satisfy 0.68.ltoreq.f.ltoreq.tan (Semi-FOV)/TTL.ltoreq.0.74. The size relation between the total length of the optical imaging lens and the system focal length and half field angle is controlled, so that the optical imaging lens can be miniaturized under the condition of meeting the size of an image plane.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the conditional expression 0.5 < f/f3 < 1.5, where f is the total effective focal length of the optical imaging lens and f3 is the effective focal length of the third lens. More specifically, f and f3 may further satisfy 0.91.ltoreq.f3.ltoreq.1.20. The third lens bears a certain positive focal power, and converges the light beams diverged by the first lens and the second lens so as to correct off-axis coma and distortion.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the conditional expression 0.5 < f/f5 < 1.5, where f is the total effective focal length of the optical imaging lens and f5 is the effective focal length of the fifth lens. More specifically, f and f5 may further satisfy 0.55.ltoreq.f5.ltoreq.1.01. The fifth lens bears a certain positive focal power in the optical imaging lens to correct astigmatic quantity in the arc losing direction and meridian direction.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the condition-1.5 < f/f6 < -0.5, where f is the total effective focal length of the optical imaging lens and f6 is the effective focal length of the sixth lens. More specifically, f and f6 may further satisfy-1.16.ltoreq.f6.ltoreq.0.72. The sixth lens bears a certain negative focal power in the optical imaging lens for correcting the petzval curve and the off-axis optical distortion.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the condition that 0 < f3/TTL <0.5, where f3 is an effective focal length of the third lens element, and TTL is a distance between an object side surface of the first lens element and an imaging surface of the optical imaging lens element on an optical axis. More specifically, f3 and TTL can further satisfy 0.2.ltoreq.f3/TTL <0.5, for example, 0.32.ltoreq.f3/TTL.ltoreq.0.43. The third lens in the vicinity of the stop position has positive optical power, and can function to converge light while correcting on-axis spherical aberration and off-axis coma.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the conditional expression 0.5 < R6/R10 < 1.5, where R6 is a radius of curvature of an image side of the third lens and R10 is a radius of curvature of an image side of the fifth lens. More specifically, R6 and R10 may further satisfy 0.77.ltoreq.R6/R10.ltoreq.1.40. The curvature radius size ratio of the image side surface of the third lens and the image side surface of the fifth lens is reasonably controlled, so that deflection amount of the principal ray of the edge view field passing through the two lenses is smaller, and the angle of the principal ray of the edge view field reaching the image surface is controlled.
In an exemplary embodiment, the optical imaging lens may further include a diaphragm to improve imaging quality of the lens group. A stop may be disposed between the second lens and the third lens.
Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.
The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the optical imaging lens is more beneficial to production and processing and is applicable to portable electronic products. The optical lens group with the configuration can also have the beneficial effects of ultra-thin, wide angle, high imaging quality and the like.
In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror, i.e., at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are aspherical mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although six lenses are described as an example in the embodiment, the optical imaging lens is not limited to include six lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 1 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 1, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 1
As can be seen from table 1, the object side surface and the image side surface of any one of the first lens element E1 to the sixth lens element E6 are aspheric. In the present embodiment, the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
Wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the aspherical i-th order. The following Table 2 shows the higher order coefficients A 4、A6、A8、A10、A12、A14、A16、A18 and A 20 that can be used for each of the aspherical mirrors S1-S12 in example 1.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 5.1918E-03 3.7266E-02 -2.5490E-02 9.9958E-03 -2.6018E-03 4.4820E-04 -4.6120E-05 2.1613E-06 -1.9903E-09
S2 6.5257E-03 1.1939E-01 -2.2254E-01 5.1459E-01 -7.7290E-01 7.2473E-01 -4.0916E-01 1.2778E-01 -1.6875E-02
S3 1.8777E-02 -4.9880E-03 1.3870E-01 -3.4124E-01 4.4438E-01 -3.5746E-01 1.7872E-01 -5.1936E-02 6.6996E-03
S4 1.0448E-01 4.5996E-01 -5.3101E+00 3.5118E+01 -1.4494E+02 3.7765E+02 -6.0661E+02 5.4853E+02 -2.1415E+02
S5 7.1349E-02 4.3778E-02 -6.6612E-01 3.0648E+00 -9.7560E+00 1.9801E+01 -2.3972E+01 1.5623E+01 -4.2208E+00
S6 -2.0668E-01 1.6055E+00 -9.3075E+00 3.3837E+01 -7.8436E+01 1.1479E+02 -1.0166E+02 4.9440E+01 -1.0124E+01
S7 -3.7087E-01 1.6457E+00 -8.8457E+00 3.0767E+01 -6.8327E+01 9.6209E+01 -8.2129E+01 3.8474E+01 -7.5565E+00
S8 -1.2209E-01 3.9303E-01 -1.9990E+00 5.7528E+00 -1.0006E+01 1.0824E+01 -7.0847E+00 2.5670E+00 -3.9712E-01
S9 5.7862E-03 8.7057E-02 -7.8083E-01 2.1672E+00 -3.4969E+00 3.5400E+00 -2.2469E+00 8.2608E-01 -1.3437E-01
S10 -2.0424E-03 1.2063E-02 -7.1365E-02 2.3806E-01 -4.2004E-01 4.1739E-01 -2.2297E-01 5.0658E-02 -8.7072E-04
S11 -3.6247E-01 3.2926E-01 -4.3549E-01 5.0742E-01 -4.2386E-01 2.2875E-01 -8.2047E-02 2.1582E-02 -3.1496E-03
S12 -1.2574E-01 6.8070E-02 -2.2491E-02 3.0865E-03 5.8190E-04 -3.0458E-04 4.9701E-05 -3.5477E-06 7.6782E-08
TABLE 2
Table 3 shows the effective focal lengths f1 to f6 of the respective lenses in embodiment 1, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, half the diagonal length ImgH of the effective pixel region on the imaging surface S15, and half the maximum field angle Semi-FOV.
f1(mm) -6.27 f6(mm) -2.16
f2(mm) -12.26 f(mm) 2.50
f3(mm) 2.24 TTL(mm) 6.40
f4(mm) -3.70 ImgH(mm) 3.26
f5(mm) 2.47 Semi-FOV(°) 60.0
TABLE 3 Table 3
The optical imaging lens in embodiment 1 satisfies:
T56/(t34+t45)/6=2.39, where T56 is the distance between the fifth lens E5 and the sixth lens E6 on the optical axis, T34 is the distance between the third lens E3 and the fourth lens E4 on the optical axis, and T45 is the distance between the fourth lens E4 and the fifth lens E5 on the optical axis;
(CT 3+ct4+ct 5)/ttl=0.27, wherein CT3 is the center thickness of the third lens E3 on the optical axis, CT4 is the center thickness of the fourth lens E4 on the optical axis, and CT5 is the center thickness of the fifth lens E5 on the optical axis;
SAG61/SAG 12= -1.90, wherein SAG61 is an on-axis distance from an intersection point of the object side surface S11 of the sixth lens E6 and the optical axis to an effective radius vertex of the object side surface S11 of the sixth lens E6, and SAG12 is an on-axis distance from an intersection point of the image side surface S2 of the first lens E1 and the optical axis to an effective radius vertex of the image side surface S2 of the first lens E1;
f12/f1=0.95, where f12 is the combined focal length of the first lens E1 and the second lens E2, and f1 is the effective focal length of the first lens E1;
f345/f=0.77, where f345 is the combined focal length of the third lens E3, the fourth lens E4 and the fifth lens E5, and f is the total effective focal length of the optical imaging lens;
f/EPD = 2.19, where f is the total effective focal length of the optical imaging lens, EPD is the entrance pupil diameter of the optical imaging lens;
ET6/CT6 = 5.13, where ET6 is the edge thickness of the sixth lens E6, CT6 is the center thickness of the sixth lens E6 on the optical axis;
DT11/DT61 = 1.56, wherein DT11 is the maximum effective radius of the object-side surface S1 of the first lens E1, and DT61 is the maximum effective radius of the object-side surface S11 of the sixth lens E6;
f (Semi-FOV)/ttl=0.68, where f is the total effective focal length of the optical imaging lens, semi-FOV is half of the maximum field angle of the optical imaging lens, and TTL is the distance between the object side surface S1 of the first lens E1 and the imaging surface S15 on the optical axis;
ff3=1.12, where f is the total effective focal length of the optical imaging lens and f3 is the effective focal length of the third lens E3;
ff5=1.01, where f is the total effective focal length of the optical imaging lens and f5 is the effective focal length of the fifth lens E5;
ff6= -1.16, where f is the total effective focal length of the optical imaging lens and f6 is the effective focal length of the sixth lens E6;
f3/ttl=0.35, where f3 is the effective focal length of the third lens element E3, and TTL is the distance between the object side surface S1 of the first lens element E1 and the imaging surface S15 on the optical axis;
R6/r10=0.94, where R6 is the radius of curvature of the image side surface S6 of the third lens element E3, and R10 is the radius of curvature of the image side surface S10 of the fifth lens element E5.
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens provided in embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 3 shows a schematic configuration of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 4 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 2, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 4 Table 4
As can be seen from table 4, in embodiment 2, the object side surface and the image side surface of any one of the first lens element E1 to the sixth lens element E6 are aspherical surfaces. Table 5 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -3.7843E-02 7.6336E-02 -5.4512E-02 2.4764E-02 -7.5602E-03 1.5374E-03 -1.9648E-04 -3.7843E-02 7.6336E-02
S2 -2.1013E-02 8.4370E-02 -3.9379E-02 6.1990E-02 -1.0610E-01 1.0114E-01 -5.1611E-02 -2.1013E-02 8.4370E-02
S3 -8.6889E-03 -2.3659E-02 1.2804E-01 -2.4544E-01 2.7719E-01 -2.0418E-01 9.3621E-02 -8.6889E-03 -2.3659E-02
S4 1.2393E-01 -1.0214E-01 5.7789E-01 -1.8002E+00 6.3938E-01 1.1607E+01 -3.4442E+01 1.2393E-01 -1.0214E-01
S5 8.5928E-02 5.9108E-02 -8.7118E-01 4.5989E+00 -1.5541E+01 3.3032E+01 -4.3626E+01 8.5928E-02 5.9108E-02
S6 -7.8051E-01 2.3365E+00 -2.6050E+00 -4.6671E+00 1.9945E+01 -2.6746E+01 1.3377E+01 -7.8051E-01 2.3365E+00
S7 -8.1541E-01 9.3668E-01 3.5119E+00 -2.0921E+01 4.9297E+01 -6.2580E+01 4.1826E+01 -8.1541E-01 9.3668E-01
S8 4.4765E-01 -2.2863E+00 7.6675E+00 -1.8250E+01 3.0570E+01 -3.4505E+01 2.4873E+01 4.4765E-01 -2.2863E+00
S9 5.5519E-01 -1.6352E+00 3.2567E+00 -4.7665E+00 4.7019E+00 -2.7021E+00 5.0055E-01 5.5519E-01 -1.6352E+00
S10 3.3206E-02 -4.8290E-03 -5.0907E-02 1.6157E-01 -2.4301E-01 1.6404E-01 -2.0233E-02 3.3206E-02 -4.8290E-03
S11 -1.3975E-01 6.1813E-02 -7.1136E-02 -1.0714E-01 4.2838E-01 -4.9834E-01 2.8344E-01 -1.3975E-01 6.1813E-02
S12 -3.8964E-02 -2.1869E-02 2.1438E-02 -4.9758E-03 -1.1956E-03 9.8952E-04 -2.4641E-04 -3.8964E-02 -2.1869E-02
TABLE 5
Table 6 shows the effective focal lengths f1 to f6 of the respective lenses in embodiment 2, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, half the diagonal length ImgH of the effective pixel region on the imaging surface S15, and half the maximum field angle Semi-FOV.
f1(mm) -4.21 f6(mm) -2.50
f2(mm) 11.60 f(mm) 2.50
f3(mm) 2.75 TTL(mm) 6.40
f4(mm) 1077.97 ImgH(mm) 3.26
f5(mm) 4.57 Semi-FOV(°) 60.0
TABLE 6
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens provided in embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic configuration diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave and an image-side surface S12 thereof is convex. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 7 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 3, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
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TABLE 7
As is clear from table 7, in example 3, the object side surface and the image side surface of any one of the first lens element E1 to the sixth lens element E6 are aspherical surfaces. Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.0638E-02 6.0565E-02 -4.7090E-02 2.3010E-02 -7.5840E-03 1.6804E-03 -2.3734E-04 1.9095E-05 -6.5621E-07
S2 -7.1593E-03 8.5191E-02 -6.6390E-02 1.0702E-01 -1.5829E-01 1.4591E-01 -7.7201E-02 2.1474E-02 -2.3590E-03
S3 -1.6317E-03 7.4297E-03 1.6061E-02 -4.3293E-02 2.6009E-02 -6.0782E-04 -1.1794E-02 7.7522E-03 -1.7531E-03
S4 9.0381E-02 2.3968E-02 -2.0579E-01 1.0753E+00 -3.7707E+00 7.7618E+00 -9.4420E+00 6.2711E+00 -1.7586E+00
S5 6.0226E-02 3.7963E-02 -4.7014E-01 1.9145E+00 -4.9270E+00 7.7137E+00 -7.1480E+00 3.5545E+00 -7.3338E-01
S6 -4.0426E-02 2.0826E-01 -9.0746E-01 2.4817E+00 -4.1677E+00 3.6915E+00 -6.8066E-01 -1.2789E+00 6.7157E-01
S7 -2.7795E-01 3.4258E-01 -1.2547E+00 4.3133E+00 -9.7195E+00 1.3408E+01 -1.0447E+01 3.9832E+00 -5.0083E-01
S8 -7.9061E-02 -9.6292E-02 1.4314E-01 2.2782E-01 -9.3039E-01 1.2846E+00 -8.8124E-01 3.0060E-01 -4.0794E-02
S9 8.9756E-02 -1.9922E-01 6.7350E-02 4.2320E-01 -1.1203E+00 1.4175E+00 -1.0457E+00 4.3347E-01 -7.7315E-02
S10 7.8504E-03 -4.7372E-02 2.0635E-01 -5.1695E-01 8.1814E-01 -8.3494E-01 5.2955E-01 -1.9313E-01 3.1475E-02
S11 -1.4543E-01 3.7942E-03 9.2904E-02 -3.6882E-01 7.1519E-01 -7.1003E-01 3.7768E-01 -1.0199E-01 1.0997E-02
S12 -4.8405E-02 -2.3134E-02 3.2840E-02 -1.3176E-02 1.6948E-03 4.1436E-04 -1.8346E-04 2.5603E-05 -1.3050E-06
TABLE 8
Table 9 shows the effective focal lengths f1 to f6 of the respective lenses in embodiment 3, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, half the diagonal length ImgH of the effective pixel region on the imaging surface S15, and half the maximum field angle Semi-FOV.
f1(mm) -4.23 f6(mm) -2.59
f2(mm) 12.08 f(mm) 2.50
f3(mm) 2.22 TTL(mm) 6.40
f4(mm) -3.71 ImgH(mm) 3.26
f5(mm) 2.90 Semi-FOV(°) 60.0
TABLE 9
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values in different image heights. Fig. 6D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens provided in embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is concave and an image-side surface S4 thereof is convex. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 10 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 4, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
Table 10
As can be seen from table 10, in example 4, the object side surface and the image side surface of any one of the first lens element E1 to the sixth lens element E6 are aspherical surfaces. Table 11 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 7.3164E-02 -7.6422E-02 7.2857E-02 -5.6652E-02 3.1888E-02 -1.2100E-02 2.9266E-03 -4.0609E-04 2.4596E-05
S2 1.0132E-01 -7.0177E-02 1.6659E-02 1.7805E-01 -4.2390E-01 4.9048E-01 -3.1581E-01 1.0789E-01 -1.4975E-02
S3 -2.7817E-02 1.7128E-02 -1.5941E-01 4.8675E-01 -9.6277E-01 1.1886E+00 -8.7971E-01 3.5910E-01 -6.1938E-02
S4 3.2939E-02 -6.4749E-02 1.7196E-01 -6.3751E-01 1.6371E+00 -2.6422E+00 2.6403E+00 -1.4864E+00 3.6321E-01
S5 8.6495E-02 -1.2565E-02 -4.5843E-01 2.0075E+00 -4.9844E+00 7.5276E+00 -6.7720E+00 3.3421E+00 -7.0142E-01
S6 8.2464E-02 -1.8741E-01 -3.5635E-01 2.0545E+00 -3.6465E+00 2.8357E+00 -3.3905E-01 -7.4037E-01 2.9319E-01
S7 -3.2227E-01 5.1320E-01 -2.3737E+00 7.0939E+00 -1.2174E+01 1.2266E+01 -6.8455E+00 1.7582E+00 -1.0480E-01
S8 -3.3007E-01 8.4373E-01 -2.3755E+00 4.9278E+00 -6.6920E+00 5.8097E+00 -3.0868E+00 9.0795E-01 -1.1269E-01
S9 3.1191E-02 1.3864E-01 -5.6695E-01 8.3346E-01 -5.8529E-01 8.2584E-02 1.4969E-01 -9.1918E-02 1.6305E-02
S10 -2.7571E-03 2.5450E-02 -7.3578E-02 2.1507E-01 -3.9335E-01 4.3457E-01 -2.8210E-01 9.7156E-02 -1.3192E-02
S11 -3.4194E-01 2.0030E-01 -3.1345E-01 5.0089E-01 -5.3761E-01 3.5115E-01 -1.3478E-01 2.7436E-02 -2.2071E-03
S12 -1.4132E-01 7.4894E-02 -2.5567E-02 4.0100E-03 4.2594E-04 -3.3960E-04 6.9736E-05 -6.7132E-06 2.5694E-07
TABLE 11
Table 12 shows effective focal lengths f1 to f6 of the respective lenses in embodiment 4, a total effective focal length f of the optical imaging lens, a distance TTL on the optical axis from an object side surface S1 to an imaging surface S15 of the first lens E1, a half ImgH of a diagonal length of an effective pixel region on the imaging surface S15, and a half Semi-FOV of a maximum field angle.
f1(mm) -4.90 f6(mm) -3.26
f2(mm) 9.84 f(mm) 2.50
f3(mm) 2.32 TTL(mm) 6.40
f4(mm) -2.91 ImgH(mm) 3.26
f5(mm) 3.00 Semi-FOV(°) 60.0
Table 12
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens provided in embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic configuration of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 13 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 5, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 13
As is clear from table 13, in example 5, the object side surface and the image side surface of any one of the first lens element E1 to the sixth lens element E6 are aspherical surfaces. Table 14 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 14
Table 15 shows effective focal lengths f1 to f6 of the respective lenses in embodiment 5, a total effective focal length f of the optical imaging lens, a distance TTL on the optical axis from an object side surface S1 to an imaging surface S15 of the first lens E1, a half ImgH of a diagonal length of an effective pixel region on the imaging surface S15, and a half Semi-FOV of a maximum field angle.
f1(mm) -4.21 f6(mm) -3.45
f2(mm) 7.65 f(mm) 2.50
f3(mm) 2.38 TTL(mm) 6.40
f4(mm) -3.07 ImgH(mm) 3.26
f5(mm) 2.70 Semi-FOV(°) 60.0
TABLE 15
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve of the optical imaging lens of embodiment 5, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different fields of view. Fig. 10D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens provided in embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural diagram of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 16 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 6, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
Table 16
As can be seen from table 16, in example 6, the object side surface and the image side surface of any one of the first lens element E1 to the sixth lens element E6 are aspherical surfaces. Table 17 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -3.5308E-02 7.5490E-02 -5.6305E-02 2.6740E-02 -8.5995E-03 1.8644E-03 -2.5889E-04 2.0622E-05 -7.0915E-07
S2 -2.1481E-02 8.9004E-02 -4.1414E-02 5.0252E-02 -8.4970E-02 8.3931E-02 -4.4630E-02 1.1941E-02 -1.1947E-03
S3 3.4110E-03 -1.2803E-02 9.4008E-02 -1.8367E-01 1.9483E-01 -1.3083E-01 5.1709E-02 -1.0435E-02 6.8789E-04
S4 1.0708E-01 4.3284E-02 -2.4263E-01 9.4243E-01 -2.6544E+00 4.9162E+00 -5.8785E+00 4.0631E+00 -1.2292E+00
S5 6.7196E-02 5.2987E-02 -6.5115E-01 2.9289E+00 -8.0822E+00 1.3430E+01 -1.3309E+01 7.2644E+00 -1.6941E+00
S6 3.6127E-02 -8.2651E-01 4.8003E+00 -1.6003E+01 3.3144E+01 -4.3493E+01 3.5136E+01 -1.5848E+01 3.0262E+00
S7 -5.5434E-01 8.9096E-01 -1.0461E+00 -3.7537E-02 2.6636E+00 -5.1590E+00 5.3446E+00 -2.9645E+00 6.6347E-01
S8 1.2535E-01 -1.1215E+00 4.5247E+00 -1.1508E+01 1.9456E+01 -2.1621E+01 1.5131E+01 -5.9937E+00 1.0177E+00
S9 2.1598E-01 -8.0392E-01 2.2277E+00 -4.3792E+00 5.6253E+00 -4.5390E+00 2.0973E+00 -4.4560E-01 1.8514E-02
S10 1.7127E-02 -6.6702E-02 3.0372E-01 -8.2559E-01 1.4142E+00 -1.5459E+00 1.0377E+00 -3.9308E-01 6.4730E-02
S11 -1.5876E-01 1.2064E-02 8.5732E-02 -2.5628E-01 4.6968E-01 -4.6597E-01 2.5013E-01 -6.8078E-02 7.3821E-03
S12 -7.1961E-02 5.1452E-03 1.5620E-02 -7.7789E-03 1.2122E-03 1.8111E-04 -9.6604E-05 1.3691E-05 -6.8967E-07
TABLE 17
Table 18 shows the effective focal lengths f1 to f6 of the respective lenses in embodiment 6, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, half the diagonal length ImgH of the effective pixel region on the imaging surface S15, and half the maximum field angle Semi-FOV.
f1(mm) -4.24 f6(mm) -2.49
f2(mm) 12.00 f(mm) 2.50
f3(mm) 2.08 TTL(mm) 6.40
f4(mm) -4.44 ImgH(mm) 3.26
f5(mm) 3.43 Semi-FOV(°) 60.0
TABLE 18
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve of the optical imaging lens of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens provided in embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 shows a schematic configuration diagram of an optical imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave, and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 19 shows the surface types, the radii of curvature, the thicknesses, the materials, and the cone coefficients of the respective lenses of the optical imaging lens of example 7, in which the units of the radii of curvature and the thicknesses are millimeters (mm).
TABLE 19
As is clear from table 19, in example 7, the object side surface and the image side surface of any one of the first lens element E1 to the sixth lens element E6 are aspherical surfaces. Table 20 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 7, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 7.9719E-02 -4.3860E-02 -2.3355E-02 7.5763E-02 -7.2572E-02 3.7708E-02 -1.1289E-02 1.8305E-03 -1.2455E-04
S2 1.2923E-01 -2.0582E-01 8.3694E-01 -2.8833E+00 6.0739E+00 -7.7139E+00 5.7646E+00 -2.3456E+00 4.0271E-01
S3 4.1267E-02 -9.6815E-02 6.2894E-01 -3.0865E+00 8.8276E+00 -1.5770E+01 1.6984E+01 -9.7385E+00 2.2801E+00
S4 1.1418E-01 -1.0398E+00 1.4108E+01 -1.1753E+02 6.0362E+02 -1.9411E+03 3.7989E+03 -4.1307E+03 1.9127E+03
S5 4.9983E-02 4.3774E-01 -5.8727E+00 4.2976E+01 -1.9350E+02 5.3733E+02 -8.9762E+02 8.2319E+02 -3.1669E+02
S6 1.9391E-01 -1.7207E+00 5.0945E+00 -9.5986E+00 8.2138E+00 6.7571E+00 -2.4967E+01 2.4505E+01 -8.7471E+00
S7 7.7960E-02 -1.5078E+00 2.7518E+00 3.1843E-01 -1.7282E+01 4.7429E+01 -6.2796E+01 4.3201E+01 -1.2428E+01
S8 -1.0228E-01 -2.5183E-01 6.0529E-01 -3.5825E-01 -1.2605E+00 3.3032E+00 -3.4592E+00 1.7668E+00 -3.6062E-01
S9 -8.5182E-02 9.9302E-03 4.5005E-01 -1.1382E+00 1.4757E+00 -1.1240E+00 5.0516E-01 -1.2487E-01 1.3190E-02
S10 3.0079E-02 -1.0397E-01 2.7908E-01 -4.2226E-01 4.3292E-01 -2.4193E-01 6.4931E-02 -6.0644E-03 -1.8310E-04
S11 3.0521E-02 6.9784E-03 -2.1397E-01 3.1416E-01 -2.1949E-01 8.5737E-02 -1.9029E-02 2.2432E-03 -1.0921E-04
S12 5.6987E-02 -1.0032E-01 5.4968E-02 -1.4440E-02 9.8620E-04 4.0867E-04 -1.1428E-04 1.1789E-05 -4.5448E-07
Table 20
Table 21 shows effective focal lengths f1 to f6 of the respective lenses in embodiment 7, a total effective focal length f of the optical imaging lens, a distance TTL on the optical axis from the object side surface S1 to the imaging surface S15 of the first lens E1, a half ImgH of the diagonal length of the effective pixel region on the imaging surface S15, and a half Semi-FOV of the maximum field angle.
f1(mm) -3.45 f6(mm) -2.99
f2(mm) 7.99 f(mm) 2.18
f3(mm) 2.25 TTL(mm) 5.90
f4(mm) -3.39 ImgH(mm) 3.26
f5(mm) 2.24 Semi-FOV(°) 63.5
Table 21
Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve of the optical imaging lens of embodiment 7, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens provided in embodiment 7 can achieve good imaging quality.
In summary, examples 1 to 7 each satisfy the relationship shown in table 22.
Conditional\embodiment 1 2 3 4 5 6 7
T56/(T34+T45)/6 2.39 2.71 2.52 1.69 2.08 2.98 1.23
(CT3+CT4+CT5)/TTL 0.27 0.27 0.26 0.25 0.26 0.28 0.32
SAG61/SAG12 -1.90 -2.03 -1.81 -1.35 -2.38 -1.99 -1.53
f12/f1 0.95 1.54 1.58 2.89 2.73 1.55 1.94
f345/f 0.77 0.81 0.82 0.99 0.92 0.82 0.88
Semi-FOV(°) 60.0 60.0 60.0 60.0 60.0 60.0 63.5
f/EPD 2.19 2.19 2.19 2.19 2.19 2.19 2.19
ET6/CT6 5.13 5.11 4.99 3.01 4.56 5.34 2.34
DT11/DT61 1.56 1.00 1.00 0.63 1.71 1.00 0.86
f*tan(Semi-FOV)/TTL 0.68 0.68 0.68 0.68 0.68 0.68 0.74
f/f3 1.12 0.91 1.13 1.08 1.05 1.20 0.97
f/f5 1.01 0.55 0.86 0.83 0.93 0.73 0.97
f/f6 -1.16 -1.00 -0.96 -0.77 -0.72 -1.00 -0.73
f3/TTL 0.35 0.43 0.35 0.36 0.37 0.32 0.38
R6/R10 0.94 1.40 0.87 0.77 0.79 0.80 1.22
Table 22
The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (12)

1. The optical imaging lens sequentially comprises, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, characterized in that,
The first lens has negative focal power, and the image side surface of the first lens is a concave surface;
the second lens has positive optical power;
the third lens has positive focal power, and the image side surface of the third lens is a convex surface;
The fourth lens has optical power;
The fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface;
The sixth lens has negative focal power, and the object side surface of the sixth lens is a concave surface; and
The number of lenses with focal power in the optical imaging lens is six;
Half of the Semi-FOV of the maximum field angle of the optical imaging lens meets 63.5 degrees or more and 60 degrees or more;
The interval distance T56 between the fifth lens and the sixth lens on the optical axis, the interval distance T34 between the third lens and the fourth lens on the optical axis and the interval distance T45 between the fourth lens and the fifth lens on the optical axis satisfy the condition that T56/(T34+T45)/6 is less than or equal to 1.23 and less than or equal to 3.0;
The combined focal length f12 of the first lens and the second lens and the effective focal length f1 of the first lens satisfy f12/f1 which is more than or equal to 1.54 and less than or equal to 3.0;
an on-axis distance SAG61 from an intersection point of the object side surface of the sixth lens and the optical axis to an effective radius vertex of the object side surface of the sixth lens and an on-axis distance SAG12 from an intersection point of the image side surface of the first lens and the optical axis to an effective radius vertex of the image side surface of the first lens satisfy-2.5 < SAG61/SAG12 < -1.0.
2. The optical imaging lens according to claim 1, wherein a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a center thickness CT5 of the fifth lens on the optical axis satisfy 0 < (CT 3+ CT4+ CT 5)/TTL < 0.5.
3. The optical imaging lens of claim 1, wherein a total effective focal length f of the optical imaging lens and an effective focal length f3 of the third lens satisfy 0.5 < f/f3 < 1.5.
4. The optical imaging lens as claimed in claim 3, wherein an effective focal length f3 of the third lens and a distance TTL between an object side surface of the first lens and an imaging surface of the optical imaging lens on an optical axis satisfy 0 < f3/TTL < 0.5.
5. The optical imaging lens of claim 1, wherein a total effective focal length f of the optical imaging lens and an effective focal length f5 of the fifth lens satisfy 0.5 < f/f5 < 1.5.
6. The optical imaging lens of claim 1, wherein a total effective focal length f of the optical imaging lens and an effective focal length f6 of the sixth lens satisfy-1.5 < f/f6 < -0.5.
7. The optical imaging lens as claimed in claim 1, wherein a combined focal length f345 of the third lens, the fourth lens and the fifth lens and a total effective focal length f of the optical imaging lens satisfy 0.5 < f 345/f.ltoreq.1.0.
8. The optical imaging lens according to claim 1, wherein a total effective focal length f of the optical imaging lens, a distance TTL between a half of a maximum field angle of the optical imaging lens and an object side surface of the first lens to an imaging surface of the optical imaging lens on an optical axis satisfies 0.5 < f×tan (half-FOV)/TTL < 1.0.
9. The optical imaging lens as claimed in claim 1, wherein an edge thickness ET6 of the sixth lens and a center thickness CT6 of the sixth lens on the optical axis satisfy 2.0 < ET6/CT6 < 5.5.
10. The optical imaging lens as claimed in claim 1, wherein a maximum effective radius DT11 of the object side of the first lens and a maximum effective radius DT61 of the object side of the sixth lens satisfy 0.5 < DT11/DT61 < 2.0.
11. The optical imaging lens as claimed in claim 1, wherein a radius of curvature R6 of an image side of the third lens and a radius of curvature R10 of an image side of the fifth lens satisfy 0.5 < R6/R10 < 1.5.
12. The optical imaging lens of any of claims 1 to 11, wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy 2.15 +.f/EPD < 2.2.
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