CN115128767B - Optical imaging lens - Google Patents
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- CN115128767B CN115128767B CN202210894450.4A CN202210894450A CN115128767B CN 115128767 B CN115128767 B CN 115128767B CN 202210894450 A CN202210894450 A CN 202210894450A CN 115128767 B CN115128767 B CN 115128767B
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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
- 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
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The application discloses optical imaging lens, this optical imaging lens includes along the optical axis from the thing side to the image side in proper order: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens; wherein the second lens has positive optical power; at least two lenses of the first lens to the fifth lens are glass lenses; the effective focal length f of the optical imaging lens satisfies: 15mm < f <18mm; and the effective focal length f of the optical imaging lens and the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy: 1<f/TTL <1.2.
Description
Technical Field
The present application relates to the field of optical elements, and in particular, to an optical imaging lens.
Background
In recent years, with the rapid development of smart phones, the consumer market has also put more extensive demands on the optical performance and the variety of photographing functions of imaging lenses of the phones. The telephoto lens has the characteristics of long focal length and high magnification, and has better local magnifying effect on the long-range view of the photographing lens for long-range view photographing. The glass lens has better reliability than plastic, but the glass material has high price, complex processing and assembling process and difficult control of yield, and the weight of the lens is reduced by adopting the mixed collocation of the plastic lens and the glass lens, the length of the lens is effectively controlled, and the manufacturing cost is reduced. In order to enable consumers to have better photographing experience, the design of the five-piece glass-plastic mixed optical imaging lens with long focal length and long photographing effect has important practical significance.
Disclosure of Invention
The present application provides such an optical imaging lens, this optical imaging lens includes in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens; wherein the second lens has positive optical power; at least two lenses of the first lens to the fifth lens are glass lenses; the effective focal length f of the optical imaging lens satisfies: 15mm < f <18mm; and the effective focal length f 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 satisfy the following conditions: 1<f/TTL <1.2.
In one embodiment, a half of a diagonal line length of the effective pixel area on the imaging surface of the optical imaging lens, a distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis, and a maximum half field angle Semi-FOV of the optical imaging lens satisfy: 0.8< TTL×tan (Semi-FOV)/ImgH <1.
In one embodiment, a distance BFL on the optical axis from the image side surface of the fifth lens to the imaging surface of the optical imaging lens, an effective focal length f of the optical imaging lens, and an aperture value fno of the optical imaging lens satisfy: 0.5< f/fno/BFL is less than or equal to 0.6.
In one embodiment, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens is ImgH, the aperture value fno of the optical imaging lens, and the effective focal length f of the optical imaging lens satisfy: 0.6< ImgH x fno/f <0.8.
In one embodiment, the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy: 0.7< (f1+f2+f3)/f <1.2.
In one embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy: 1< (f 2-f 3)/f 1<2.
In one embodiment, the first lens to the fifth lens have a center thickness on the optical axis, respectively, and any two adjacent lenses of the first lens to the fifth lens have an air space on the optical axis, and a maximum value CTmax of the center thickness, a minimum value CTmin of the center thickness, a maximum value ATmax of the air space, and a minimum value ATmin of the air space satisfy: 0.6< (ctmin+ctmax)/(atmin+atmax) <1.1.
In one embodiment, the first lens to the fifth lens each have a center thickness on the optical axis, and any two adjacent lenses of the first lens to the fifth lens have an air space on the optical axis, and a sum Σct of the center thicknesses and a sum Σat of the air spaces satisfy: 0.6< ΣAT/ΣCT <1.
In one embodiment, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the air interval T34 of the third lens and the fourth lens on the optical axis, and the air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy: 0.7< (CT3+CT4+CT5)/(T34+T45) <1.3.
In one embodiment, the distance BFL on the optical axis from the image side surface of the fifth lens element to the imaging surface of the optical imaging lens element and the distance TD on the optical axis from the object side surface of the first lens element to the image side surface of the fifth lens element satisfy: 0.8< TD/BFL <1.1.
In one embodiment, any adjacent two lenses of the first to fifth lenses have an air space on the optical axis, and the sum Σat of the air spaces, the air space T34 on the optical axis of the third and fourth lenses, and the air space T45 on the optical axis of the fourth and fifth lenses satisfy: 0.9< (T34+T45)/(Sigma AT < 1).
In one embodiment, the center thickness CT3 of the third lens element on the optical axis and the effective radius DT32 of the image-side surface of the third lens element satisfy: 0.6< CT3/DT32<1.4.
In one embodiment, the effective radius DT11 of the object-side surface of the first lens, the effective radius DT31 of the object-side surface of the third lens, and the effective radius DT51 of the object-side surface of the fifth lens satisfy: (DT 11/DT 31) - (DT 51/DT 31) 0.1 <0.3.
In one embodiment, the first to fifth lenses have edge thicknesses, respectively, the first to fifth lenses have center thicknesses on the optical axis, respectively, and a maximum value ETmax of the edge thicknesses and a maximum value CTmax of the center thicknesses satisfy: ETmax/CTmax is less than or equal to 0.9 and less than 1.5.
In one embodiment, the edge thickness ET3 of the third lens, the edge thickness ET5 of the fifth lens, the center thickness CT3 of the third lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis satisfy: 1< (ET 3+ ET 5)/(CT 3+ CT 5) <1.2.
In one embodiment, the first lens to the fifth lens respectively have edge thicknesses, and the sum Σet of the edge thicknesses, the edge thickness ET3 of the third lens, and the edge thickness ET5 of the fifth lens satisfy: 0.6< (ET 3+ ET 5)/(sigma ET < 0.8).
In one embodiment, the first to fifth lenses include a spherical lens and an aspherical lens.
In one embodiment, the first lens has positive optical power and the third lens has negative optical power.
In one embodiment, the object-side surface of the first lens element is convex, the object-side surface of the second lens element is convex, the image-side surface of the third lens element is concave, and the object-side surface of the fourth lens element is concave.
The optical imaging lens of this application adopts five lenses, through the effective focal length and the optical total length of control optical imaging lens at reasonable scope for optical imaging lens has long burnt characteristic, guarantees simultaneously that effective focal length is greater than the optical total length in order to reach the purpose of taking photograph far away, in addition, the optical imaging lens of this application adopts glass to mould mixed lens under the condition that satisfies long burnt tele, can improve the stability under the high low temperature environment.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
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 shows a schematic structural view 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 structural 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 structural view of an optical imaging lens according to embodiment 5 of the present application; and
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.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed description are merely illustrative of exemplary embodiments of the application and are 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 present application, use of "may" means "one or more embodiments of the present 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, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction 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 five lenses having optical power, which are a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, respectively. The five lenses are arranged in order from the object side to the image side along the optical axis. Any two adjacent lenses in the first lens to the fifth lens can have a spacing distance.
In an exemplary embodiment, the first lens may have positive or negative optical power; the second lens may have positive optical power; the third lens may have positive or negative optical power; the fourth lens may have positive or negative optical power; and the fifth lens may have positive or negative optical power. In an exemplary embodiment, the object-side surface of the first lens element is convex, the object-side surface of the second lens element is convex, the image-side surface of the third lens element is concave, and the object-side surface of the fourth lens element is concave. The surface type of the optical imaging lens is beneficial to more reasonable distribution of the focal power of the optical imaging lens, and is important to improving the aberration correction capability of the optical imaging lens and reducing the sensitivity of the optical imaging lens.
In an exemplary embodiment, the optical imaging lens according to the exemplary embodiment of the present application further includes a stop disposed at an object side surface of the first lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 15mm < f <18mm and 1<f/TTL <1.2, where f is the effective focal length of the optical imaging lens and TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens. More specifically, f and TTL can further satisfy: 17.29mm < f <17.69mm, 1.02< f/TTL <1.12. The optical imaging lens meets the requirements of 17.29mm < f <17.69mm and 1.02< f/TTL <1.12, is favorable for ensuring that the effective focal length is larger than the total optical length so as to achieve the aim of taking a photograph far, and is favorable for enabling the optical imaging lens to achieve the effect of amplifying the 5 multiplied equivalent focal length by controlling the effective focal length and the total optical length of the optical imaging lens in a reasonable range.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.8< TTL×tan (Semi-FOV)/ImgH <1, wherein ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, 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, and Semi-FOV is the maximum half field angle of the optical imaging lens. More specifically, imgH, TTL, and Semi-FOV may further satisfy: 0.88< TTL×tan (Semi-FOV)/ImgH <0.96. The optical total length and the field angle of the optical imaging lens are constrained within a reasonable range under the condition of fixing an imaging target surface by satisfying 0.8< TTL multiplied by tan (Semi-FOV)/ImgH <1, and the volume of the module can be reduced by constraining the optical total length TTL, so that the balance of the field angle on-axis astigmatism and field curvature can be adjusted.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5< f/fno/BFL is less than or equal to 0.6, wherein BFL is the distance between the image side surface of the fifth lens and the imaging surface of the optical imaging lens on the optical axis, f is the effective focal length of the optical imaging lens, and fno is the aperture value of the optical imaging lens. More specifically, f, fno, and BFL may further satisfy: 0.52< f/fno/BFL < 0.6. The size relation between the effective focal length and the aperture and the BFL is favorably controlled by satisfying 0.5< f/fno/BFL less than or equal to 0.6, so that the BFL is long enough to satisfy the space size of other components in the module, and the light-transmitting caliber of the optical imaging lens is ensured to be in a required range.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.6< ImgH x fno/f <0.8, wherein ImgH is half the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, fno is the aperture value of the optical imaging lens, and f is the effective focal length of the optical imaging lens. More specifically, imgH, fno, and f may further satisfy: 0.63< ImgH x fno/f <0.79. Meets the requirement of 0.6< ImgH multiplied by fno/f <0.8, is favorable for restraining the aperture and the effective focal length of the optical imaging lens under the condition of fixing an imaging surface, and ensures the light quantity of the optical imaging lens to be in a required range and the amplification factor.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.7< (f1+f2+f3)/f <1.2, where f is the effective focal length of the optical imaging lens, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens. More specifically, f1, f2, f3, and f further satisfy: 0.76< (f1+f2+f3)/f <1.11. Satisfying 0.7< (f1+f2+f3)/f <1.2, is favorable to controlling the optical power of the first lens, the second lens and the third lens, and reduces the higher order spherical aberration under large aperture and the coma aberration of off-axis view field.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1< (f 2-f 3)/f 1<2, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens. More specifically, f1, f2, and f3 may further satisfy: 1.05< (f 2-f 3)/f 1<1.83. Satisfying 1< (f 2-f 3)/f 1<2 is advantageous to balance the primary spherical aberration amount of the optical imaging lens and further correct the optical distortion of the optical imaging lens.
In an exemplary embodiment, the first lens to the fifth lens each have a center thickness on the optical axis, and any adjacent two lenses of the first lens to the fifth lens have an air space on the optical axis, the optical imaging lens according to the present application can satisfy: 0.6< (ctmin+ctmax)/(atmin+atmax) <1.1, wherein CTmax is the maximum value of the center thickness, CTmin is the minimum value of the center thickness, ATmax is the maximum value of the air interval, and ATmin is the minimum value of the air interval. More specifically, CTmin, CTmax, ATmin and ATmax may further satisfy: 0.68< (ctmin+ctmax)/(atmin+atmax) <1.03. Satisfying 0.6< (ctmin+ctmax)/(atmin+atmax) <1.1, is advantageous for reducing the meridional astigmatism of the off-axis field of view.
In an exemplary embodiment, the first lens to the fifth lens each have a center thickness on the optical axis, and any adjacent two lenses of the first lens to the fifth lens have an air space on the optical axis, the optical imaging lens according to the present application can satisfy: 0.6< Σat/Σct <1, where Σct is the sum of center thicknesses and Σat is the sum of air intervals. More specifically, Σat and Σct may further satisfy: 0.64< ΣAT/ΣCT <0.97. Satisfying 0.6< [ Sigma ] AT/[ Sigma ] CT <1, which is beneficial to ensuring the bearing space between adjacent lenses and reducing the deflection of partial lens surface light rays so as to reduce the tolerance sensitivity.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.7< (CT 3+ CT4+ CT 5)/(t34 + T45) <1.3, wherein CT3 is the center thickness of the third lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, T34 is the air space of the third lens and the fourth lens on the optical axis, and T45 is the air space of the fourth lens and the fifth lens on the optical axis. More specifically, CT3, CT4, CT5, T34, and T45 may further satisfy: 0.7< (CT3+CT4+CT5)/(T34+T45) <1.22. Satisfies 0.7< (CT3+CT4+CT5)/(T34+T45) <1.3, is favorable for ensuring manufacturability of the optical imaging lens, and simultaneously balances and optimizes coma and spherical aberration of the optical imaging lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.8< TD/BFL <1.1, where BFL is the distance on the optical axis from the image side of the fifth lens element to the imaging plane of the optical imaging lens, and TD is the distance on the optical axis from the object side of the first lens element to the image side of the fifth lens element. More specifically, TD and BFL may further satisfy: 0.85< TD/BFL <1.09. The spacing between adjacent lenses is overlarge, so that the spacer bearing structure is overlarge in thickness and serious parasitic light is avoided.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.9< (T34+T45)/(SigmaAT < 1), wherein SigmaAT is the sum of the air intervals on the optical axis of any adjacent two lenses of the first lens to the fifth lens, T34 is the air interval on the optical axis of the third lens and the fourth lens, and T45 is the air interval on the optical axis of the fourth lens and the fifth lens. Satisfying 0.9< (T34+T45)/(Sigma AT < 1), the fourth lens and the fifth lens are relatively close to the imaging surface by restricting the air interval between the third lens and the fourth lens and the air interval between the fourth lens and the fifth lens, thus being beneficial to realizing long focal length and long distance shooting, reducing the caliber of the two lenses and being beneficial to processing.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.6< CT3/DT32<1.4, where CT3 is the center thickness of the third lens on the optical axis and DT32 is the effective radius of the image-side surface of the third lens. More specifically, CT3 and DT32 may further satisfy: 0.68< CT3/DT32<1.35. The lens meets the requirement of 0.6< CT3/DT32<1.4, controls the caliber of the image side surface of the third lens to be in a certain range, is beneficial to reducing the caliber, coma aberration and other aberration, is beneficial to ensuring the relative illuminance to be in an acceptable range, restricts the thickness and caliber size of the center, and is beneficial to ensuring the manufacturability of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.1 < l (DT 11/DT 31) - (DT 51/DT 31) <0.3, wherein DT11 is the effective radius of the object-side surface of the first lens, DT31 is the effective radius of the object-side surface of the third lens, and DT51 is the effective radius of the object-side surface of the fifth lens. More specifically, DT11, DT31, and DT51 may further satisfy: 0.1 < l (DT 11/DT 31) - (DT 51/DT 31) <0.22. Meets 0.1-15 (DT 11/DT 31) - (DT 51/DT 31) 0.3, is beneficial to controlling the caliber sizes of the first lens, the third lens and the fifth lens to meet the designed aperture size, and is beneficial to ensuring the relative illumination size of the edge view field.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: and ETmax/CTmax is less than or equal to 0.9 and is less than 1.5, wherein ETmax is the maximum value of the edge thicknesses of the first lens to the fifth lens, and CTmax is the maximum value of the center thicknesses of the first lens to the fifth lens on the optical axis. Meets the condition that ETmax/CTmax is less than or equal to 0.9 and less than 1.5, and is favorable for controlling the thicknesses of the edges and the center of the first lens to the fifth lens within a reasonable range so as to ensure the thickness uniformity of each lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1< (ET 3+ ET 5)/(CT 3+ CT 5) <1.2, wherein ET3 is the edge thickness of the third lens, ET5 is the edge thickness of the fifth lens, CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. More specifically, ET3, ET5, CT3 and CT5 may further satisfy: 1.02< (ET 3+ ET 5)/(CT 3+ CT 5) <1.13. Meets 1< (ET 3+ ET 5)/(CT 3+ CT 5) <1.2, and is beneficial to ensuring the uniformity of the lens in a reasonable processing range.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.6< (ET 3+ ET 5)/Σet <0.8, where Σet is the sum of the edge thicknesses of the first to fifth lenses, ET3 is the edge thickness of the third lens, ET5 is the edge thickness of the fifth lens. More specifically, ET3, ET5, and Σet may further satisfy: 0.61< (ET 3+ ET 5)/Σet <0.79. Meets the requirement of 0.6< (ET 3+ ET 5)/(sigma ET < 0.8), is favorable for enabling the third lens and the fifth lens to meet the processing requirement of the glass spherical lens core taking, and simultaneously ensures the strength of the lens.
In an exemplary embodiment, at least two lenses among the first to fifth lenses are glass lenses. The high refractive index material adopts spherical glass, so that the difficulty of glass processing technology is reduced while the optical performance is met, and meanwhile, the refractive index range of the adopted glass material is larger than that of plastic, so that the balance of chromatic aberration is facilitated. The material temperature characteristic of the glass is better than that of plastic, and the reliability of the lens in a high-temperature high-humidity environment is improved. The number of lenses using plastic and glass is not particularly limited in this application, and glass lenses may be used for all lenses if temperature performance is of great concern.
In an exemplary embodiment, the first to fifth lenses include a spherical lens and an aspherical lens. The present application is not particularly limited to the specific number of spherical lenses and aspherical lenses, and the lenses may each use an aspherical lens if focus is on annotating image quality. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. The spherical lens is characterized in that: there is a constant curvature from the center of the lens to the periphery. The aspheric lens has better curvature radius characteristic and has the advantages of improving distortion aberration and astigmatism aberration. By adopting the aspherical lens, aberration occurring during imaging can be eliminated as much as possible, thereby improving imaging quality.
In an exemplary embodiment, the optical imaging lens according to the application uses a glass material for the spherical lens and a plastic material for the aspherical lens, and the combination of the spherical glass and the aspherical plastic is beneficial to reducing the cost and improving the reliability of the lens in a high-temperature and high-humidity environment.
In an exemplary embodiment, the effective focal length f1 of the first lens may be, for example, in the range of 8.64mm to 12.51mm, the effective focal length f2 of the second lens may be, for example, in the range of 7.90mm to 13.74mm, the effective focal length f3 of the third lens may be, for example, in the range of-5.41 mm to-4.33 mm, the effective focal length f4 of the fourth lens may be, for example, in the range of-112.28 mm to 254.08mm, and the effective focal length f5 of the fifth lens may be, for example, in the range of-5633.89 mm to 24.65 mm. 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 can meet the condition that TTL is less than or equal to 16.00mm and less than or equal to 16.76mm. Half the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens may be, for example, in the range of 3.31mm to 3.48 mm. The maximum half field angle Semi-FOV of the optical imaging lens satisfies: the Semi-FOV >10.5, the Semi-FOV may be, for example, in the range of 10.52 to 11.15.
In an exemplary embodiment, the optical imaging lens according to the present application further includes a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an imaging surface.
The optical imaging lens according to the exemplary embodiment of the present application has a tele characteristic. In application, the optical imaging lens according to the exemplary embodiment of the application can be designed by using a periscope lens, so that the length direction of the periscope lens is arranged along the vertical or transverse direction of the electronic equipment, and the purpose of reducing the thickness of the body of the electronic equipment is achieved. The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, the above five lenses. Through reasonable setting of each lens of the optical imaging lens, the long-focus characteristic of the lens is realized, so that a good shooting effect can be realized.
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens may be varied to achieve the various results and advantages described in the specification without departing from the technical solutions claimed herein. For example, although the description has been made by taking five lenses as an example in the embodiment, the optical imaging lens is not limited to include five 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, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. 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 filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In this example, the effective focal length f of the optical imaging lens is 17.68mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens) is 16.00mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens is 3.47mm, and the maximum half field angle Semi-FOV of the optical imaging lens is 10.92 °.
Table 1 shows the basic parameter table of the optical imaging lens of embodiment 1, in which the units of the radius of curvature, the thickness, the effective radius, and the effective focal length are all millimeters (mm).
TABLE 1
In embodiment 1, the object side surfaces and the image side surfaces of the first lens element E1, the second lens element E2, and the fourth lens element E4 are aspheric, and the object side surfaces and the image side surfaces of the third lens element E3 and the fifth lens element E5 are spherical. The profile x of each aspherical lens can be defined using, 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 a conic coefficient; ai is the correction coefficient of the aspherical i-th order. Table 2 below shows the higher order coefficients A that can be used for the aspherical mirror surfaces S1-S4, S7, S8 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 and A16 。
Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
S1 | 1.9790E-03 | -1.0259E-03 | -1.7594E-04 | -1.8531E-04 | -6.6032E-05 | 2.2001E-05 | 2.6989E-06 |
S2 | 3.8230E-02 | -3.6302E-03 | 9.2707E-04 | -4.5019E-04 | 7.2370E-06 | 7.7761E-05 | -2.1002E-05 |
S3 | 3.2398E-02 | 2.4223E-03 | 3.4547E-03 | 5.6814E-04 | 2.9659E-04 | 1.8660E-04 | 1.4147E-05 |
S4 | 1.6477E-02 | 6.1280E-03 | 1.9154E-03 | 4.8563E-04 | 1.6728E-04 | 8.0212E-05 | 3.5185E-06 |
S7 | 1.2990E-02 | -4.5662E-03 | 4.9619E-04 | -8.5509E-05 | 2.6590E-05 | -8.1897E-06 | 6.1669E-06 |
S8 | 1.5274E-02 | -2.1464E-03 | 1.6286E-04 | -3.0231E-05 | 5.5213E-06 | -1.0006E-06 | 6.0071E-08 |
TABLE 2
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 structural diagram of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive 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 negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. 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 convex, and an image-side surface S10 thereof is convex. The filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In this example, the effective focal length f of the optical imaging lens is 17.48mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens) is 16.65mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens is 3.47mm, and the maximum half field angle Semi-FOV of the optical imaging lens is 11.14 °.
Table 3 shows the basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness, the effective radius, and the effective focal length are all millimeters (mm). Table 4 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.
TABLE 3 Table 3
Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
S1 | 1.7037E-03 | 2.8165E-03 | 3.7761E-04 | -3.1758E-04 | -4.6316E-05 | 1.6102E-05 | -1.0426E-06 |
S2 | 4.0194E-02 | 4.3579E-04 | 4.8292E-04 | -1.2314E-03 | 3.6670E-04 | -2.9728E-05 | -2.0914E-06 |
S3 | 4.2614E-02 | 8.0120E-03 | 2.0460E-03 | -8.6747E-04 | 4.3944E-04 | 6.4071E-05 | 8.4546E-06 |
S4 | 1.8827E-02 | 8.6293E-03 | 1.3663E-03 | 5.9895E-05 | 2.4041E-05 | 6.8344E-05 | 2.0283E-06 |
S7 | -5.5451E-03 | -3.1078E-03 | -4.3890E-04 | -6.7664E-05 | -8.7075E-06 | 4.8744E-07 | -2.8135E-06 |
S8 | 6.7173E-03 | -5.4268E-03 | -1.1655E-03 | -2.7387E-04 | -9.3981E-05 | -2.9888E-05 | -1.3519E-05 |
TABLE 4 Table 4
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 structural diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. 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 negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In this example, the effective focal length f of the optical imaging lens is 17.30mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens) is 16.75mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens is 3.34mm, and the maximum half field angle Semi-FOV of the optical imaging lens is 10.71 °.
Table 5 shows the basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness, the effective radius, and the effective focal length are all millimeters (mm). Table 6 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.
TABLE 5
Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
S1 | -2.0899E-02 | 2.4149E-03 | 4.0213E-03 | 2.4500E-03 | 1.8050E-03 | 1.3966E-03 | 3.9170E-04 |
S2 | 4.2109E-02 | 5.2867E-03 | 1.0451E-03 | -1.5596E-03 | -5.2546E-04 | -1.6181E-03 | -2.0729E-03 |
S3 | 4.9069E-02 | 4.6450E-03 | 1.2261E-03 | -1.0767E-03 | -8.6883E-04 | 5.0672E-04 | -5.5255E-05 |
S4 | 1.8392E-02 | -1.8782E-04 | 1.4153E-03 | 8.0999E-04 | 1.0762E-03 | 8.1036E-04 | 1.7982E-04 |
S7 | -3.2338E-02 | -2.4281E-03 | 4.1706E-05 | -3.7980E-05 | 6.0703E-06 | -7.9585E-06 | 3.1767E-06 |
S8 | -2.4978E-01 | 4.3253E-02 | -2.9920E-02 | -1.2184E-02 | -6.5704E-03 | -8.8199E-03 | -3.0578E-04 |
TABLE 6
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 corresponding to 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 structural diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. 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 filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In this example, the effective focal length f of the optical imaging lens is 17.53mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens) is 16.30mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens is 3.32mm, and the maximum half field angle Semi-FOV of the optical imaging lens is 10.53 °.
Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness, the effective radius, and the effective focal length are all millimeters (mm). Table 8 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.
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TABLE 7
Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
S1 | -8.9804E-03 | -3.8745E-04 | 5.3325E-04 | 1.9851E-04 | 1.1337E-05 | 1.1246E-05 | 6.2122E-06 |
S2 | 4.2226E-02 | -2.0595E-03 | 2.3201E-03 | -2.0422E-04 | 1.0886E-05 | 5.4601E-05 | -9.9125E-06 |
S3 | 3.9440E-02 | 2.7854E-03 | 2.9358E-03 | 2.0068E-04 | 1.9750E-05 | 6.1655E-05 | 1.5710E-08 |
S4 | 2.1895E-02 | 4.5644E-03 | 1.2410E-03 | 2.0353E-04 | 2.4265E-05 | 2.6060E-05 | -2.1139E-06 |
S7 | 1.2738E-02 | -4.4717E-03 | 1.6430E-04 | -4.2856E-05 | 6.6427E-08 | -5.5319E-07 | 2.8157E-07 |
S8 | 3.0894E-02 | -3.2730E-03 | 2.5056E-04 | -2.5141E-05 | 1.3040E-06 | 4.7773E-08 | -6.4288E-08 |
TABLE 8
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 structural diagram of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. 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 convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. 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 filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In this example, the effective focal length f of the optical imaging lens is 17.38mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens) is 16.52mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens is 3.40mm, and the maximum half field angle Semi-FOV of the optical imaging lens is 11.03 °.
Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of the radius of curvature, the thickness, the effective radius, and the effective focal length are all millimeters (mm). Table 10 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 9
Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
S1 | 2.8931E-03 | 1.8869E-03 | 1.0820E-03 | 3.4241E-05 | 8.6915E-05 | 5.7222E-05 | -2.8193E-06 |
S2 | 4.0044E-02 | -3.3274E-04 | 9.5646E-04 | -1.0491E-03 | 5.7985E-04 | -8.8476E-05 | 5.8478E-06 |
S3 | 4.5462E-02 | 9.1190E-03 | 1.7946E-03 | -1.0731E-03 | 4.5251E-04 | -4.3179E-05 | -2.5657E-06 |
S4 | 1.5027E-02 | 9.6691E-03 | 6.6119E-04 | -2.0129E-04 | 3.2811E-05 | 2.9657E-05 | -1.2274E-05 |
S7 | -9.7335E-03 | -4.9231E-03 | -8.3505E-04 | -1.2464E-04 | -2.3066E-05 | -5.5149E-06 | -1.7938E-06 |
S8 | 2.5512E-02 | -6.2586E-03 | -1.1504E-03 | -1.4492E-04 | -2.2066E-05 | -4.0538E-06 | 2.1522E-06 |
Table 10
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 image heights. 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.
In summary, examples 1 to 5 satisfy the relationships shown in table 11, respectively.
Condition/example | 1 | 2 | 3 | 4 | 5 |
f/TTL | 1.11 | 1.05 | 1.03 | 1.08 | 1.05 |
TTL×tan(Semi-FOV)/ImgH | 0.89 | 0.94 | 0.95 | 0.91 | 0.95 |
f/fno/BFL | 0.57 | 0.59 | 0.53 | 0.60 | 0.54 |
ImgH×fno/f | 0.71 | 0.74 | 0.76 | 0.64 | 0.78 |
(f1+f2+f3)/f | 0.77 | 1.10 | 0.87 | 0.77 | 1.00 |
(f2-f3)/f1 | 1.33 | 1.82 | 1.06 | 1.57 | 1.49 |
(CTmin+CTmax)/(ATmin+ATmax) | 0.69 | 0.92 | 1.02 | 0.91 | 0.83 |
∑AT/∑CT | 0.73 | 0.94 | 0.65 | 0.82 | 0.96 |
(CT3+CT4+CT5)/(T34+T45) | 0.86 | 0.74 | 1.21 | 0.70 | 0.73 |
TD/BFL | 0.86 | 1.08 | 1.01 | 0.88 | 1.05 |
(T34+T45)/∑AT | 0.90 | 0.98 | 0.94 | 0.93 | 0.98 |
CT3/DT32 | 0.70 | 1.34 | 0.69 | 0.70 | 1.26 |
|(DT11/DT31)-(DT51/DT31)| | 0.21 | 0.10 | 0.19 | 0.18 | 0.20 |
ETmax/CTmax | 1.43 | 1.22 | 0.90 | 1.46 | 1.21 |
(ET3+ET5)/(CT3+CT5) | 1.07 | 1.09 | 1.03 | 1.12 | 1.07 |
(ET3+ET5)/∑ET | 0.64 | 0.78 | 0.77 | 0.62 | 0.75 |
TABLE 11
The present application also provides an imaging device, the electron-sensitive element of which may 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 foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.
Claims (15)
1. The optical imaging lens is characterized by comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens; wherein,
The first lens has positive optical power;
the second lens has positive optical power;
the third lens has negative focal power;
at least two lenses of the first lens to the fifth lens are glass lenses;
the number of lenses with focal power in the optical imaging lens is five;
half of the diagonal length of an effective pixel area on an imaging surface of the optical imaging lens is ImgH, and the aperture value fno of the optical imaging lens and the effective focal length f of the optical imaging lens satisfy the following conditions: 0.6< imgh x fno/f <0.8;
the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy the following conditions: 0.7< (f1+f2+f3)/f <1.2;
the distance BFL between the image side surface of the fifth lens element and the imaging surface of the optical imaging lens element on the optical axis and the distance TD between the object side surface of the first lens element and the image side surface of the fifth lens element on the optical axis satisfy the following conditions: 0.8< TD/BFL <1.1;
the effective focal length f of the optical imaging lens satisfies: 15mm < f <18mm; and
the effective focal length f 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 satisfy: 1<f/TTL <1.2.
2. The optical imaging lens according to claim 1, wherein a half of a diagonal length ImgH of an effective pixel region on an imaging surface of the optical imaging lens, a distance TTL on the optical axis from an object side surface of the first lens to the imaging surface of the optical imaging lens, and a maximum half field angle Semi-FOV of the optical imaging lens satisfy: 0.8< TTL×tan (Semi-FOV)/ImgH <1.
3. The optical imaging lens according to claim 1, wherein a distance BFL on the optical axis from an image side surface of the fifth lens to an imaging surface of the optical imaging lens, an effective focal length f of the optical imaging lens, and an aperture value fno of the optical imaging lens satisfy: 0.5< f/fno/BFL is less than or equal to 0.6.
4. The optical imaging lens according to claim 1, wherein an effective focal length f1 of the first lens, an effective focal length f2 of the second lens, and an effective focal length f3 of the third lens satisfy: 1< (f 2-f 3)/f 1<2.
5. The optical imaging lens according to any one of claims 1 to 4, wherein the first to fifth lenses each have a center thickness on the optical axis, and any adjacent two of the first to fifth lenses have an air gap on the optical axis, a maximum value CTmax of the center thickness, a minimum value CTmin of the center thickness, a maximum value ATmax of the air gap, and a minimum value ATmin of the air gap satisfy: 0.6< (ctmin+ctmax)/(atmin+atmax) <1.1.
6. The optical imaging lens according to any one of claims 1 to 4, wherein the first to fifth lenses each have a center thickness on the optical axis, and any adjacent two of the first to fifth lenses have an air space on the optical axis, a sum Σct of the center thicknesses and a sum Σat of the air spaces satisfying: 0.6< ΣAT/ΣCT <1.
7. The optical imaging lens according to any one of claims 1 to 4, 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, a center thickness CT5 of the fifth lens on the optical axis, an air interval T34 of the third lens and the fourth lens on the optical axis, and an air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy: 0.7< (CT3+CT4+CT5)/(T34+T45) <1.3.
8. The optical imaging lens according to any one of claims 1 to 4, wherein any adjacent two lenses of the first to fifth lenses have an air space on the optical axis, a sum Σat of the air spaces, an air space T34 of the third and fourth lenses on the optical axis, an air space T45 of the fourth and fifth lenses on the optical axis satisfy: 0.9< (T34+T45)/(Sigma AT < 1).
9. The optical imaging lens according to claim 1, wherein a center thickness CT3 of the third lens on the optical axis and an effective radius DT32 of an image side surface of the third lens satisfy: 0.6< CT3/DT32<1.4.
10. The optical imaging lens according to claim 1, wherein an effective radius DT11 of the object side surface of the first lens, an effective radius DT31 of the object side surface of the third lens, and an effective radius DT51 of the object side surface of the fifth lens satisfy: (DT 11/DT 31) - (DT 51/DT 31) 0.1 <0.3.
11. The optical imaging lens according to claim 1, wherein the first to fifth lenses each have an edge thickness, the first to fifth lenses each have a center thickness on the optical axis, and a maximum value ETmax of the edge thickness and a maximum value CTmax of the center thickness satisfy: ETmax/CTmax is less than or equal to 0.9 and less than 1.5.
12. The optical imaging lens as set forth in claim 1, wherein an edge thickness ET3 of the third lens, an edge thickness ET5 of the fifth lens, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT5 of the fifth lens on the optical axis satisfy: 1< (ET 3+ ET 5)/(CT 3+ CT 5) <1.2.
13. The optical imaging lens according to claim 1, wherein the first to fifth lenses each have an edge thickness, a sum Σet of the edge thicknesses, an edge thickness ET3 of the third lens, and an edge thickness ET5 of the fifth lens satisfy: 0.6< (ET 3+ ET 5)/(sigma ET < 0.8).
14. The optical imaging lens according to any one of claims 1, 9 to 13, wherein the first to fifth lenses include a spherical lens and an aspherical lens.
15. The optical imaging lens system according to any one of claims 1, 9 to 13, wherein the object-side surface of the first lens element is convex, the object-side surface of the second lens element is convex, the image-side surface of the third lens element is concave, and the object-side surface of the fourth lens element is concave.
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CN111965807A (en) * | 2020-09-18 | 2020-11-20 | 安徽科技学院 | Optical aiming system, camera module and electronic equipment |
CN113933967A (en) * | 2021-10-14 | 2022-01-14 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
CN114527554A (en) * | 2022-02-24 | 2022-05-24 | 浙江舜宇光学有限公司 | Optical imaging lens |
CN114624858A (en) * | 2020-12-11 | 2022-06-14 | 大立光电股份有限公司 | Optical image lens assembly and electronic device |
CN114755802A (en) * | 2022-04-28 | 2022-07-15 | 浙江舜宇光学有限公司 | Imaging lens |
CN217034397U (en) * | 2022-04-28 | 2022-07-22 | 浙江舜宇光学有限公司 | Imaging system |
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CN111965807A (en) * | 2020-09-18 | 2020-11-20 | 安徽科技学院 | Optical aiming system, camera module and electronic equipment |
CN114624858A (en) * | 2020-12-11 | 2022-06-14 | 大立光电股份有限公司 | Optical image lens assembly and electronic device |
CN113933967A (en) * | 2021-10-14 | 2022-01-14 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
CN114527554A (en) * | 2022-02-24 | 2022-05-24 | 浙江舜宇光学有限公司 | Optical imaging lens |
CN114755802A (en) * | 2022-04-28 | 2022-07-15 | 浙江舜宇光学有限公司 | Imaging lens |
CN217034397U (en) * | 2022-04-28 | 2022-07-22 | 浙江舜宇光学有限公司 | Imaging system |
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