CN219285486U - Optical imaging lens - Google Patents
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- CN219285486U CN219285486U CN202223193611.1U CN202223193611U CN219285486U CN 219285486 U CN219285486 U CN 219285486U CN 202223193611 U CN202223193611 U CN 202223193611U CN 219285486 U CN219285486 U CN 219285486U
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Abstract
The application discloses optical imaging lens, this optical imaging lens includes: a lens barrel and a lens group disposed in the lens barrel; the lens group comprises a first lens with positive focal power, a second lens with negative focal power, a third lens, a fourth lens and a fifth lens with negative focal power, which are sequentially arranged from an object side to an image side along an optical axis; the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d0s of the object side end of the lens barrel, and the inner diameter d0m of the image side end of the lens barrel satisfy the following conditions: -5< fi/(d0s+d0m) <102, where i=1, 2, 3, 4 or 5.
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 rapid development of technology, mobile phones have become more and more popular, and the trend of mobile phones toward high performance and high quality is more and more obvious. The mobile phone camera shooting technology is an important embodiment of high performance of mobile phones, and under the condition of ensuring high performance, a long-focus lens is increasingly pursued by people.
For the long-focus lens, the long-focus lens is characterized by long focal length and small visual angle, so that the distance of shooting by the long-focus lens can be long, the shot scene space is relatively small, the depth of field is small, and the background highlighting focusing main body can be effectively weakened. However, the barrel of a telephoto lens is generally long, and miniaturization is not easy to achieve. The lenses of the long-focus lens have large step difference, the larger the step difference is, the higher the requirement on the assembly stability is, the larger the concentricity deviation after assembly is caused by the unstable assembly, and the light focusing and imaging quality are affected.
Disclosure of Invention
The present application provides such an optical imaging lens, the optical imaging lens includes: a lens barrel and a lens group disposed in the lens barrel; the lens group comprises a first lens with positive focal power, a second lens with negative focal power, a third lens, a fourth lens and a fifth lens with negative focal power, which are sequentially arranged from an object side to an image side along an optical axis; the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d0s of the object side end of the lens barrel, and the inner diameter d0m of the image side end of the lens barrel satisfy the following conditions: -5< fi/(d0s+d0m) <102, where i=1, 2, 3, 4 or 5.
In one embodiment, the optical imaging lens further comprises: a second spacer disposed between the second lens and the third lens and at least partially contacting an image side surface of the second lens; and a third spacer disposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens; the curvature radius R4 of the image side surface of the second lens element, the curvature radius R5 of the object side surface of the third lens element, the inner diameter d2s of the object side surface of the second spacer, the inner diameter d3s of the object side surface of the third spacer and the f-number Fno of the optical imaging lens element satisfy the following conditions: 9< (R4/d2s+R5/d3s) ×FNo <20.
In one embodiment, the optical imaging lens further comprises: a first spacer disposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens; the distance EP01 from the object side end of the lens barrel to the object side surface of the first spacer along the optical axis direction, the center thickness CT1 of the first lens on the optical axis, and the air interval T12 between the first lens and the second lens on the optical axis satisfy: 1< (CT 1-EP 01)/T12 <7.
In one embodiment, the optical imaging lens further comprises: a first spacer disposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens; a third spacer disposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens; the combined focal length f12 of the first lens and the second lens, the combined focal length f34 of the third lens and the fourth lens, the inner diameter d1s of the object side surface of the first spacer and the inner diameter d3s of the object side surface of the third spacer satisfy: -3< f12/d1s+f34/d3s <8.
In one embodiment, the optical imaging lens further comprises: a third spacer disposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens; a third auxiliary spacer disposed on the image side of the third spacer and at least partially contacting the image side of the third spacer; the radius of curvature R5 of the object side surface of the third lens element, the radius of curvature R6 of the image side surface of the third lens element, the inner diameter d3bm of the image side surface of the third auxiliary spacer and the inner diameter d3m of the image side surface of the third spacer satisfy the following conditions: 1< (R5/R6) × (d 3bm/d3 m) <7.
In one embodiment, the optical imaging lens further comprises: a third spacer disposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens; a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting an image side surface of the fourth lens; the curvature radius R10 of the image side surface of the fifth lens, the effective focal length f5 of the fifth lens, the spacing distance EP34 between the third spacer and the fourth spacer along the optical axis direction, and the center thickness CT4 of the fourth lens on the optical axis satisfy: 1< |R10/f5|× (EP 34/CT 4) <15.
In one embodiment, the optical imaging lens further comprises: a first spacer disposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens; a second spacer disposed between the second lens and the third lens and at least partially contacting an image side surface of the second lens; a third spacer disposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens; a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting an image side surface of the fourth lens; wherein, the interval distance EP12 of the first spacer and the second spacer along the optical axis direction, the interval distance EP34 of the third spacer and the fourth spacer along the optical axis direction, the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy: -12< (f2+f5)/(EP 12+ep 34) < -4.
In one embodiment, at least one lens in the lens group has a refractive index greater than 1.6, and the optical imaging lens satisfies: 5< djs/T12<45, where j=2, 3 or 4, djs is an inner diameter of an object side surface of a spacer located on an image side of a lens having a refractive index greater than 1.6 and at least partially in contact with the image side of the lens having a refractive index greater than 1.6, T12 is an air space on an optical axis of the first lens and the second lens; where j is taken to be 2, d2s represents an inner diameter of an object side surface of the second spacer disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens; when j is taken to be 3, d3s represents the inner diameter of the object side surface of the third spacer which is placed on the image side of the third lens and is at least partially in contact with the image side surface of the third lens; and j is taken to be 4, d4s denotes an inner diameter of an object side surface of the fourth spacer which is placed on the image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens.
In one embodiment, the optical imaging lens further comprises: a first spacer disposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens; a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting an image side surface of the fourth lens; the effective focal length f1 of the first lens, the effective focal length f4 of the fourth lens, the inner diameter d1s of the object side surface of the first spacer and the inner diameter d4s of the object side surface of the fourth spacer satisfy: 2< |f1×f4|/(d1s×d4s) <15.
In one embodiment, the optical imaging lens further comprises: a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting an image side surface of the fourth lens; wherein, the internal diameter D4s of the object side of the fourth isolation member, the external diameter D4s of the object side of the fourth isolation member, the air interval T23 of the second lens and the third lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis satisfy: 18< (d4s+d4s)/(T23+CT5) <28.
In one embodiment, the optical imaging lens further comprises: a third spacer disposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens; the radius of curvature R5 of the object side surface of the third lens element, the radius of curvature R6 of the image side surface of the third lens element, the inner diameter D3m of the image side surface of the third spacer and the outer diameter D3m of the image side surface of the third spacer satisfy the following conditions: 2< (d3m+d3m)/(r5+r6) <12.
In one embodiment, the optical imaging lens further comprises: a third spacer disposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens; and a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting an image side surface of the fourth lens; the interval distance EP34 between the third spacer and the fourth spacer in the optical axis direction, the outer diameter D4s of the object side surface of the fourth spacer, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the air interval T23 of the second lens and the third lens on the optical axis satisfy: 10< EP34/CT4+D4s/(T23+CT3) <17.
In one embodiment, the optical imaging lens further comprises: a first spacer disposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens; a third spacer disposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens; a third auxiliary spacer disposed on the image side of the third spacer and at least partially contacting the image side of the third spacer; the sum Σct of the center thicknesses of the first lens to the fifth lens on the optical axis, the sum Σat of the air intervals between any two adjacent lenses in the first lens to the fifth lens on the optical axis, the maximum thickness CP1 of the first spacer along the optical axis direction, and the maximum thickness CP3b of the third auxiliary spacer along the optical axis direction satisfy: 5< ΣCT/CP1+ ΣAT/CP3b <15.
The utility model provides an optical imaging lens is long burnt camera lens of five formula, through the focal power of each lens of rational control, can effectively weaken the lens refracting power, improve big image plane camera lens formation of image quality, the relation of the interior diameter of the thing side end and the image side end of the effective focal length of each lens of rational setting up simultaneously and the lens cone, guarantee each gear cooperation with certain gradient size of lens and lens cone, can guarantee that the lens of big poor both sides of section of thick bamboo has sufficient stability, embody better performance in the reliability test, improve concentricity problem, thereby promote the stability of the assemblage of lens, further still be favorable to guaranteeing the front and back end size of camera lens and lens cone overall height, realize the miniaturized characteristics of camera lens.
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 is a schematic diagram showing a structural layout and some parameters of an optical imaging lens according to the present application;
fig. 2A to 2B show schematic structural views of an optical imaging lens according to embodiment 1 of the present application;
fig. 3A to 3D 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 according to embodiment 1 of the present application;
fig. 4A to 4B show schematic structural views of an optical imaging lens according to embodiment 2 of the present application;
fig. 5A to 5D 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 according to embodiment 2 of the present application;
fig. 6A to 6B show schematic structural views of an optical imaging lens according to embodiment 3 of the present application;
fig. 7A to 7D 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 according to embodiment 3 of the present application;
fig. 8A to 8B show schematic structural views of an optical imaging lens according to embodiment 4 of the present application; and
Fig. 9A to 9D 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 according to embodiment 4 of the present application.
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.
In this context, curvature or paraxial curvature refers to the curvature of the region near the optical axis. If the curvature of the lens surface is positive and the position of the curvature is not defined, the curvature of the lens surface at least in the paraxial region is positive; if the curvature of the lens surface is negative and the position of the curvature is not defined, it means that the curvature of the lens surface is negative 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 following examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements may be made without departing from the concept of the present application, which are all within the scope of protection of the present application, for example, the lens group (i.e., the first lens to the fifth lens) in each embodiment of the present application, the lens barrel, and the spacer may be arbitrarily combined, and the lens group in one embodiment is not limited to be combined with the lens barrel, the spacer, and the like in this embodiment only.
The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. Fig. 1 is a schematic diagram showing a structural layout and a part of parameters of an optical imaging lens according to the present application. It will be appreciated by those skilled in the art that some parameters commonly used in the art, such as the center thickness CT1 of the first lens on the optical axis, are not shown in fig. 1, and fig. 1 only illustrates a part of parameters of a barrel and a spacer of one optical imaging lens of the present application for better understanding of the present invention. As shown in fig. 1, EP01 represents a distance in the optical axis direction from the object side end of the lens barrel to the object side surface of the first spacer; EP12 denotes a separation distance of the first spacer and the second spacer in the optical axis direction; EP34 denotes a separation distance of the third spacer and the fourth spacer in the optical axis direction; CP1 denotes a maximum thickness of the first spacer in the optical axis direction; CP4 denotes a maximum thickness of the fourth spacer in the optical axis direction; CP3b denotes a maximum thickness of the third auxiliary spacer in the optical axis direction; d0s represents the outer diameter of the object side end of the lens barrel; d0s represents the inner diameter of the object side end of the lens barrel; d3m represents the inner diameter of the image side surface of the third spacer; d3s represents the inner diameter of the object side surface of the third spacer; d1s represents the inner diameter of the object side surface of the first separator; d2s represents the inner diameter of the object side surface of the second separator; d3bm represents the inner diameter of the image side surface of the third auxiliary spacer; d4s represents the inner diameter of the object side surface of the fourth separator; d3m represents the outer diameter of the image side surface of the third spacer; d4s denotes the outer diameter of the object side surface of the fourth separator.
The optical imaging lens according to an exemplary embodiment of the present application includes a lens barrel and a lens group disposed inside the lens barrel, wherein the lens group includes, 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. The first lens has positive optical power, the second lens has negative optical power, and the fifth lens has negative optical power. The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d0s of the object side end of the lens barrel, and the inner diameter d0m of the image side end of the lens barrel satisfy the following conditions: -5< fi/(d0s+d0m) <102, where i=1, 2, 3, 4 or 5. The refractive power of each lens can be effectively weakened through reasonable control, the imaging quality of a large-image-surface lens is improved, meanwhile, the relation between the effective focal length of each lens and the inner diameters of the object side end and the image side end of the lens barrel is reasonably set, the lens and each gear of the lens barrel are matched with each other in a certain gradient size, the lenses on two sides of a large level difference can be ensured to have enough stability, better performance is reflected in reliability test, concentricity problem is improved, the assembly stability of the lenses can be improved, the imaging quality of the lenses can be effectively improved, in addition, the front end and the rear end of the lenses and the total height of the lens barrel are guaranteed, and the miniaturization of the lenses is facilitated.
In an exemplary embodiment, the optical imaging lens may further include a first spacer interposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens, a second spacer interposed between the second lens and the third lens and at least partially contacting an image side surface of the second lens, a third spacer interposed between the third lens and the fourth lens and at least partially contacting an image side surface of the third lens, and a fourth spacer interposed between the fourth lens and the fifth lens and at least partially contacting an image side surface of the fourth lens. The spacer is arranged between the adjacent lenses, so that the light path is intercepted, the penetration parasitic light is prevented from being generated between the adjacent lenses, and the common bearing parts between the adjacent lenses are buffered, so that the stress is uniform, and the problem that the lens quality is affected due to lens fragmentation caused by stress concentration is prevented. For the long-focus lens provided by the application, large step difference is arranged between lenses of the long-focus lens, the larger the step difference is, the higher the requirement on the assembling stability is, the larger the concentricity deviation after assembling can be caused, the light focusing is influenced, the bearing stability can be improved by configuring proper spacers between the lenses with the large step difference, the bearing strength at two ends of the lens barrel is improved, and therefore the reliability and the imaging quality of the lens are improved.
In an exemplary embodiment, the optical imaging lens may further include a third auxiliary spacer disposed at an image side of the third spacer and at least partially contacting the image side of the third spacer.
It should be understood that the number of spacers is not particularly limited in this application, any number of spacers may be included between any two lenses, and any number of spacers may be included with the entire optical imaging lens. The spacer is favorable for the optical imaging lens to intercept redundant refraction and reflection light paths and reduce the generation of stray light and ghost images. The auxiliary bearing is added between the isolating piece and the lens barrel, so that the problems of poor assembly stability, low performance yield and the like caused by large step difference among lenses are solved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 9< (R4/d2s+R5/d3s) ×FNo <20, wherein R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, d2s is the inner diameter of the object side of the second spacer, d3s is the inner diameter of the object side of the third spacer, and FNo is the f-number of the optical imaging lens. The requirements of 9< (R4/d2s+R5/d3s) multiplied by FNo <20 are met, the requirements of guaranteeing the performance and imaging quality of the lens are facilitated, specifically, the curvature radius R4 of the image side surface of the second lens and the curvature radius R5 of the object side surface of the third lens determine the concave-convex degree of the image side surface of the second lens and the object side surface of the third lens, the emergent state of light rays from the second lens and the incident state of light rays from the third lens are influenced, and the imaging effect of the lens is further influenced; the inner diameter d2s of the object side surface of the second isolation piece and the inner diameter d3s of the object side surface of the third isolation piece respectively determine the shielding degree of the second isolation piece to the light path of the second lens and the light path of the third lens, so that the imaging quality of the lens is affected.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1< (CT 1-EP 01)/T12 <7, wherein EP01 is the distance from the object side end of the lens barrel to the object side surface of the first isolation piece along the optical axis direction, CT1 is the center thickness of the first lens on the optical axis, and T12 is the air interval between the first lens and the second lens on the optical axis. Satisfying 1< (CT 1-EP 01)/T12 <7, being favorable to guaranteeing the demand of lens shaping, through controlling this conditional formula, can guarantee that EP01 and CT 1's ratio, the ratio is close to 1, and the shaping of first lens is easier, simultaneously through controlling this conditional formula, still is favorable to rationally controlling the limit thickness of first lens and the central thickness on the optical axis of first lens to prevent that assembled lens and lens effective diameter face from taking place to interfere in the optical axis direction, avoid lens outward appearance problem emergence and performance abnormal problem, improve outward appearance and performance yield.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -3< f12/d1s+f34/d3s <8, wherein f12 is the combined focal length of the first lens and the second lens, f34 is the combined focal length of the third lens and the fourth lens, d1s is the inner diameter of the object side of the first spacer, and d3s is the inner diameter of the object side of the third spacer. The lens satisfies the condition that-3 < f12/d1s+f34/d3s <8, and the focal power of the front four lenses is controlled, thereby being beneficial to compensating the spherical aberration of the front four lenses. Meanwhile, the spacers are reasonably used between the lenses, so that stray light can be effectively reduced, imaging quality of the lens is improved, assembly stability of the lens is improved, and performance yield is improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1< (R5/R6) × (d 3bm/d3 m) <7, wherein R5 is the radius of curvature of the object-side surface of the third lens element, R6 is the radius of curvature of the image-side surface of the third lens element, d3bm is the inner diameter of the image-side surface of the third auxiliary spacer, and d3m is the inner diameter of the image-side surface of the third spacer. When the principal ray passes through the front three lenses, the light path is gentle, and when the principal ray passes through the fourth lens and the fifth lens, the light becomes steeper gradually, and 1< (R5/R6) × (d 3bm/d3 m) <7 is satisfied, so that the optical parameters can be effectively controlled, the lens reliability can be improved in a larger space on the premise of meeting the design requirement, and the imaging quality of the lens can be improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1< |R10/f5|× (EP 34/CT 4) <15, wherein R10 is the radius of curvature of the image side surface of the fifth lens, f5 is the effective focal length of the fifth lens, EP34 is the spacing distance of the third spacer and the fourth spacer in the direction of the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis. Satisfying 1< |R10/f5|× (EP 34/CT 4) <15, being beneficial to controlling the incidence angle of off-axis field light on the imaging surface, increasing the matching with the photosensitive element and the bandpass filter; in addition, the optical power and the surface shape of the fifth lens are controlled, good processing feasibility of the fifth lens is guaranteed, and meanwhile imaging quality can be guaranteed effectively.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -12< (f2+f5)/(ep12+ep34) < -4, wherein EP12 is a spacing distance of the first spacer to the second spacer in the optical axis direction, EP34 is a spacing distance of the third spacer and the fourth spacer in the optical axis direction, f2 is an effective focal length of the second lens, and f5 is an effective focal length of the fifth lens. The optical power of the second lens and the fifth lens is reasonably set so as to meet the requirement of-12 < (f2+f5)/(EP 12+EP 34) < -4, thereby being beneficial to ensuring the imaging quality of the lens and meeting the design characteristics of the tele lens. The spacing distance EP12 between the first isolating piece and the second isolating piece along the optical axis direction determines the center thickness of the second lens, and the reasonable control of the EP12 is beneficial to the processing and forming of the second lens. The maximum thickness CP4 of the fourth isolation piece along the optical axis direction is reasonably designed, so that the processing and forming of the fourth isolation piece are facilitated, the field curvature adjusting effect of the fourth isolation piece is further exerted, and the imaging quality of the lens is guaranteed.
In an exemplary embodiment, the refractive index of at least one lens in the lens group of the optical imaging lens according to the present application is greater than 1.6, and the optical imaging lens satisfies: 5< djs/T12<45, where j=2, 3 or 4, djs is an inner diameter of an object side surface of a spacer located on an image side of a lens having a refractive index greater than 1.6 and at least partially in contact with the image side of the lens having a refractive index greater than 1.6, T12 is an air space on an optical axis of the first lens and the second lens; wherein, when j is taken as 2, d2s represents the inner diameter of the object side surface of the second separator; when j is taken as 3, d3s represents the inner diameter of the object side surface of the third spacer; and j is taken to be 4, d4s represents the inner diameter of the object side surface of the fourth separator. The ratio of the inner diameter of the object side surface of the isolation piece, which is propped against the image side surface of the lens with the refractive index larger than 1.6, to the air interval of the first lens and the second lens is controlled in a reasonable range, so that the light beam of the optical imaging lens has a smaller incident angle when entering the image surface, the relative illuminance is increased, the refractive capacity of the lens is reduced, and the imaging quality of the large-image-surface lens is improved. Meanwhile, the long focal lens is easy to reflect at the inner diameter of the isolating piece due to the fact that light rays are approximately parallel to be incident, so that stray light is caused, the inner diameter of the isolating piece is reasonably designed, the stray light state of the lens is improved, and the imaging quality of the lens is improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2< |f1×f4|/(d1s×d4s) <15, wherein f1 is the effective focal length of the first lens, f4 is the effective focal length of the fourth lens, d1s is the inner diameter of the object side surface of the first spacer, and d4s is the inner diameter of the object side surface of the fourth spacer. Satisfies 2< |f1×f4|/(d1s×d4s) <15, is favorable for the first lens and the fourth lens to give full play to the converging effect of the first lens and the fourth lens on light rays, and the first lens and the fourth lens can completely transmit and effectively converge imaging light rays, so that the imaging quality of the lens is ensured. And the inner diameter d1s of the object side surface of the first isolation piece and the inner diameter d4s of the object side surface of the fourth isolation piece are restrained, so that light rays entering the second lens and light rays exiting the fourth lens are blocked, the stray light state and imaging illumination of the lens are improved, energy loss is reduced, and the imaging quality of the optical imaging lens is improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 18< (d4s+d4s)/(t23+ct5) <28, wherein D4s is the inner diameter of the object side surface of the fourth spacer, D4s is the outer diameter of the object side surface of the fourth spacer, T23 is the air space on the optical axis between the second lens and the third lens, and CT5 is the center thickness of the fifth lens on the optical axis. Satisfying 18< (d4s+d4s)/(T23+CT5) <28, in the present application, the distance between the optical axes of the third lens and the fourth lens is very large, resulting in high light sensitivity of the fourth lens, the air space T23 between the second lens and the third lens on the optical axis and the air space T45 between the fourth lens and the fifth lens on the optical axis have field curvature adjusting function, the ratio of the sum of the outer diameter D4s of the object side surface of the fourth spacer and the outer diameter D4s of the object side surface of the fourth spacer to the sum of the air space T23 and the air space T45 is sufficiently large, that is, the maximum light range passing through the third lens is ensured, meanwhile, the larger the contact area is, the better the assemblage stability of the fourth lens is, the field curvature can be optimized by reasonably controlling the above conditional expression, and the performance yield of the lens is improved, thereby balancing the light sensitivity of the fourth lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2< (d3m+d3m)/(r5+r6) <12, wherein R5 is a radius of curvature of the object side surface of the third lens element, R6 is a radius of curvature of the image side surface of the third lens element, D3m is an inner diameter of the image side surface of the third spacer, and D3m is an outer diameter of the image side surface of the third spacer. Satisfying 2< (d3m+d3m)/(r5+r6) <12 is beneficial to ensuring the requirement of lens assembly stability, the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens determine the overall profile of the third lens, the inner diameter D3m of the image side surface of the third spacer and the outer diameter D3m of the image side surface of the third spacer determine the contact area of the third spacer and the object side surface of the fourth lens, and the larger the two contact areas, the better the assembly stability of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 10< EP34/CT4 +d4s/(t23+ct 3) <17, wherein EP34 is the distance between the third spacer and the fourth spacer in the optical axis direction, D4s is the outer diameter of the object side surface of the fourth spacer, 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, and T23 is the air space between the second lens and the third lens on the optical axis. Satisfying 10< EP34/CT4+D4s/(T23+CT3) <17, being beneficial to ensuring the lens forming and stray light improvement needs, and being beneficial to controlling the edge thickness of the fourth lens and reducing the forming difficulty of the fourth lens by controlling the interval distance EP34 between the third and fourth isolating pieces along the optical axis; the air interval T23 between the second lens and the third lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis determine the profile of the second, third and fourth lenses, the profile directly affects the optimization and improvement degree of the internal stray light of the second, third and fourth lenses, and the internal stray light of the second, third and fourth lenses can be improved by controlling the parameters of the part.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 5< Σct/CP1+ Σat/CP3b <15, wherein Σct is the sum of the thicknesses of the centers of the first lens to the fifth lens on the optical axis, Σat is the sum of the air intervals on the optical axis between any adjacent two lenses of the first lens to the fifth lens, CP1 is the maximum thickness of the first spacer in the optical axis direction, CP3b is the maximum thickness of the third auxiliary spacer in the optical axis direction. The center thickness of the lens and the maximum thickness of the spacer are determined to a certain extent, and the total length of the lens is 5< ΣCT/CP1+ ΣAT/CP3b <15, so that the thicknesses of the lens and the spacer are reasonably controlled, and the requirements of appearance control and miniaturization of the lens are met. In addition, the increase of the reflecting paths in the lens is unfavorable for the improvement and the improvement of the shooting effect of the lens due to the fact that the thickness of the lens is too large, and therefore the reasonable control of the thickness of the lens is favorable for meeting the requirement of improving the stray light of the optical imaging lens.
In an exemplary embodiment, the first lens may have positive power, the second lens may have negative power, the third lens may have positive or negative power, the fourth lens may have positive or negative power, and the fifth lens may have negative power. The refractive power of the lens can be effectively weakened by reasonably matching the focal power, and the imaging quality of the large-image-plane lens can be improved.
In an exemplary embodiment, 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, the above five lenses. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like of each lens, incident light rays can be effectively converged, the optical total length of the imaging lens is reduced, and the processability of the imaging lens is improved, so that the optical imaging lens is more beneficial to production and processing.
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 of the first lens to the image side surface of the fifth 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 and the fifth lens are aspheric mirror surfaces.
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 1001 and an optical imaging lens 1002 according to embodiment 1 of the present application are described below with reference to fig. 2A to 3D. Fig. 2A to 2B show schematic structural diagrams of an optical imaging lens 1001 and an optical imaging lens 1002 according to embodiment 1 of the present application, respectively.
As shown in fig. 2A to 2B, the optical imaging lens 1001 and the optical imaging lens 1002 each include a lens barrel P0, lens groups E1 to E5, and a plurality of spacers P1 to P4.
As shown in fig. 2A to 2B, the optical imaging lens 1001 and the optical imaging lens 1002 employ the same lens group, which includes, in order from the object side to the image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5. The first lens E1 has positive optical power, and has an object side surface S1 and an image side surface S2. The second lens E2 has negative optical power, and has an object side surface S3 and an image side surface S4. The third lens E3 has negative optical power, and has an object side surface S5 and an image side surface S6. The fourth lens element E4 has negative optical power and has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has negative optical power, and has an object side surface S9 and an image side surface S10. The filter has an object side S11 and an image side S12, and light from an object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on an imaging surface S13.
Table 1 shows basic parameter tables of lens groups of the optical imaging lens 1001 and the optical imaging lens 1002 of embodiment 1, in which units of a radius of curvature, a thickness, and an effective focal length are each millimeters (mm).
TABLE 1
In this example, the f-number Fno of each of the optical imaging lens 1001 and the optical imaging lens 1002 is 2.480; the effective focal lengths f of the optical imaging lens 1001 and the optical imaging lens 1002 are 6.855mm; the maximum half field angles Semi-FOV of the optical imaging lens 1001 and the optical imaging lens 1002 are 23.753 °.
In embodiment 1, the object side surface and the image side surface of the first lens element E1 to the fifth lens element E5 are aspheric, and the surface profile x of each aspheric lens element can be defined by, but not limited to, the following aspheric 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 shows the higher order coefficients A that can be used for each of the aspherical mirror surfaces S1-S10 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
TABLE 2
As shown in fig. 2A to 2B, the plurality of spacers of the optical imaging lens 1001 and the optical imaging lens 1002 each include a first spacer P1, a second spacer P2, a third spacer P3, a third auxiliary spacer P3B, and a fourth spacer P4. Wherein the first spacer P1 is disposed between the first lens E1 and the second lens E2 and at least partially contacts the image side surface of the first lens E1; the second spacer P2 is disposed between the second lens E2 and the third lens E3 and is at least partially in contact with the image side surface of the second lens E2; the third spacer P3 is disposed between the third lens E3 and the fourth lens E4 and is at least partially in contact with the image side surface of the third lens E3; the third auxiliary spacer P3b is disposed on the image side of the third spacer P3 and is at least partially in contact with the third spacer P3; the fourth spacer P4 is disposed between the fourth lens E4 and the fifth lens E5 and is at least partially in contact with the image side surface of the fourth lens E4. The plurality of spacers can block the entry of external excessive light, make the lens and the lens barrel better bear against, and enhance the structural stability of the optical imaging lens 1001 and the optical imaging lens 1002.
Table 3 shows basic parameters of lenses, spacers, and barrels of the optical imaging lens 1001 and the optical imaging lens 1002 of embodiment 1, and each parameter in table 3 has a unit of millimeter (mm).
| Example parameters | |
|
| d1s | 2.580 | 2.740 |
| d2s | 1.633 | 1.622 |
| d3s | 1.646 | 1.635 |
| d3m | 1.646 | 1.635 |
| D3m | 3.979 | 3.952 |
| d4s | 3.430 | 3.423 |
| D4s | 4.019 | 3.997 |
| d0s | 3.370 | 3.371 |
| d0m | 5.309 | 5.269 |
| EP01 | 0.729 | 0.729 |
| CP1 | 0.220 | 0.539 |
| EP12 | 0.338 | 0.020 |
| EP34 | 0.951 | 1.103 |
| CP4 | 0.190 | 0.018 |
| d3bm | 3.292 | 3.292 |
| CP3b | 0.760 | 0.743 |
| f12 | 3.989 | 3.989 |
| f34 | -6.543 | -6.543 |
| ∑CT | 2.510 | 2.510 |
| ∑AT | 2.175 | 2.175 |
TABLE 3 Table 3
Fig. 3A shows on-axis chromatic aberration curves of the optical imaging lens 1001 and the optical imaging lens 1002 of embodiment 1, which represent the convergent focus deviation of light rays of different wavelengths after passing through the lenses. Fig. 3B shows astigmatism curves of the optical imaging lens 1001 and the optical imaging lens 1002 of embodiment 1, which represent meridional image plane curvature and sagittal image plane curvature. Fig. 3C shows distortion curves of the optical imaging lens 1001 and the optical imaging lens 1002 of embodiment 1, which represent distortion magnitude values corresponding to different image heights. Fig. 3D shows a magnification chromatic aberration curve of the optical imaging lens 1001 and the optical imaging lens 1002 of embodiment 1, which represents deviations of different image heights on an imaging plane after light passes through the lens. As can be seen from fig. 3A to 3D, the optical imaging lens 1001 and the optical imaging lens 1002 according to embodiment 1 can achieve good imaging quality.
Example 2
The optical imaging lens 2001 and the optical imaging lens 2002 according to embodiment 2 of the present application are described below with reference to fig. 4A to 5D. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 4A to 4B show schematic structural diagrams of an optical imaging lens 2001 and an optical imaging lens 2002 according to embodiment 2 of the present application, respectively.
As shown in fig. 4A to 4B, the optical imaging lens 2001 and the optical imaging lens 2002 each include a lens barrel P0, lens groups E1 to E5, and a plurality of spacers P1 to P4.
As shown in fig. 4A to 4B, the optical imaging lens 2001 and the optical imaging lens 2002 employ the same lens group including, in order from the object side to the image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5. The first lens E1 has positive optical power, and has an object side surface S1 and an image side surface S2. The second lens E2 has negative optical power, and has an object side surface S3 and an image side surface S4. The third lens E3 has negative optical power, and has an object side surface S5 and an image side surface S6. The fourth lens element E4 has negative optical power and has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has negative optical power, and has an object side surface S9 and an image side surface S10. The filter has an object side S11 and an image side S12, and light from an object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on an imaging surface S13.
In this example, the f-number Fno of each of the optical imaging lens 2001 and the optical imaging lens 2002 is 2.480; the effective focal lengths f of the optical imaging lens 2001 and the optical imaging lens 2002 are 6.870mm; the maximum half field angles Semi-FOV of the optical imaging lens 2001 and the optical imaging lens 2002 are 23.241 °.
Table 4 shows basic parameter tables of lens groups of the optical imaging lens 2001 and the optical imaging lens 2002 of embodiment 2, in which units of a radius of curvature, a thickness, and an effective focal length are each millimeters (mm). 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.
TABLE 4 Table 4
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 6.0062E-03 | -1.6236E-02 | 4.0255E-02 | -4.9306E-02 | 3.1591E-02 | -6.0478E-03 | -4.3080E-03 | 2.7315E-03 | -4.6348E-04 |
| S2 | -2.8389E-02 | 1.3664E-01 | -2.8867E-01 | 4.0836E-01 | -3.7680E-01 | 2.2375E-01 | -8.3082E-02 | 1.7687E-02 | -1.6567E-03 |
| S3 | -9.2323E-02 | 2.0450E-01 | -3.8393E-01 | 5.5137E-01 | -5.3982E-01 | 4.2080E-01 | -3.1463E-01 | 1.7492E-01 | -4.3872E-02 |
| S4 | -2.5548E-03 | 3.6382E-01 | -1.0715E+00 | 4.0774E+00 | -1.0294E+01 | 1.4545E+01 | -6.3399E+00 | -6.9404E+00 | 6.7795E+00 |
| S5 | 3.1154E-01 | -2.8603E-01 | 2.6048E+00 | -1.4240E+01 | 4.5297E+01 | -8.7294E+01 | 1.0109E+02 | -6.4856E+01 | 1.7894E+01 |
| S6 | 2.7208E-01 | 1.4193E-01 | -2.0339E+00 | 1.0506E+01 | -3.3340E+01 | 6.4937E+01 | -7.2914E+01 | 4.0609E+01 | -6.9412E+00 |
| S7 | 6.3511E-02 | -5.6711E-01 | 1.2809E+00 | -1.5804E+00 | 1.1469E+00 | -4.9497E-01 | 1.1744E-01 | -1.1682E-02 | 0.0000E+00 |
| S8 | 3.8518E-01 | -1.5762E+00 | 2.3951E+00 | -1.9996E+00 | 9.8862E-01 | -2.9472E-01 | 5.1110E-02 | -4.6167E-03 | 1.6745E-04 |
| S9 | 2.7364E-01 | -1.2525E+00 | 2.0533E+00 | -1.8211E+00 | 9.6790E-01 | -3.1747E-01 | 6.3178E-02 | -7.0186E-03 | 3.3504E-04 |
| S10 | -3.4502E-01 | 6.6316E-01 | -7.3643E-01 | 4.9810E-01 | -2.1269E-01 | 5.7590E-02 | -9.6017E-03 | 9.0067E-04 | -3.6445E-05 |
TABLE 5
As shown in fig. 4A to 4B, the plurality of spacers of the optical imaging lens 2001 and the optical imaging lens 2002 each include a first spacer P1, a second spacer P2, a third spacer P3, a third auxiliary spacer P3B, and a fourth spacer P4, respectively. Wherein the first spacer P1 is disposed between the first lens E1 and the second lens E2 and at least partially contacts the image side surface of the first lens E1; the second spacer P2 is disposed between the second lens E2 and the third lens E3 and is at least partially in contact with the image side surface of the second lens E2; the third spacer P3 is disposed between the third lens E3 and the fourth lens E4 and is at least partially in contact with the image side surface of the third lens E3; the third auxiliary spacer P3b is disposed on the image side of the third spacer P3 and is at least partially in contact with the third spacer P3; the fourth spacer P4 is disposed between the fourth lens E4 and the fifth lens E5 and is at least partially in contact with the image side surface of the fourth lens E4. The plurality of spacers can block the entry of external excessive light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 2001 and the optical imaging lens 2002 can be enhanced.
Table 6 shows basic parameters of the lenses, spacers, and barrels of the optical imaging lens 2001 and the optical imaging lens 2002 of embodiment 2, and each parameter in units of millimeters (mm) in table 6.
TABLE 6
Fig. 5A shows on-axis chromatic aberration curves of the optical imaging lens 2001 and the optical imaging lens 2002 of embodiment 2, which represent the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 5B shows astigmatism curves of the optical imaging lens 2001 and the optical imaging lens 2002 of embodiment 2, which represent meridional image plane curvature and sagittal image plane curvature. Fig. 5C shows distortion curves of the optical imaging lens 2001 and the optical imaging lens 2002 of embodiment 2, which represent distortion magnitude values corresponding to different image heights. Fig. 5D shows magnification chromatic aberration curves of the optical imaging lens 2001 and the optical imaging lens 2002 of embodiment 2, which represent deviations of different image heights on an imaging plane after light passes through the lens. As can be seen from fig. 5A to 5D, the optical imaging lens 2001 and the optical imaging lens 2002 provided in embodiment 2 can achieve good imaging quality.
Example 3
The optical imaging lens 3001, the optical imaging lens 3002, and the optical imaging lens 3003 according to embodiment 3 of the present application are described below with reference to fig. 6A to 7D. Fig. 6A to 6B show schematic structural diagrams of an optical imaging lens 3001 and an optical imaging lens 3002 according to embodiment 3 of the present application, respectively.
As shown in fig. 6A to 6B, the optical imaging lens 3001 and the optical imaging lens 3002 each include a lens barrel P0, lens groups E1 to E5, and a plurality of spacers P1 to P4.
As shown in fig. 6A to 6B, the optical imaging lens 3001 and the optical imaging lens 3002 employ the same lens group, which includes, in order from the object side to the image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5. The first lens E1 has positive optical power, and has an object side surface S1 and an image side surface S2. The second lens E2 has negative optical power, and has an object side surface S3 and an image side surface S4. The third lens E3 has positive optical power, and has an object side surface S5 and an image side surface S6. The fourth lens element E4 has positive optical power and has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has negative optical power, and has an object side surface S9 and an image side surface S10. The filter has an object side S11 and an image side S12, and light from an object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on an imaging surface S13.
In this example, the f-number Fno of each of the optical imaging lens 3001 and the optical imaging lens 3002 is 2.480; the effective focal lengths f of the optical imaging lens 3001 and the optical imaging lens 3002 are 6.700mm; the maximum half field angles Semi-FOV of the optical imaging lens 3001 and the optical imaging lens 3002 are 20.864 °.
Table 7 shows basic parameter tables of lens groups of the optical imaging lens 3001 and the optical imaging lens 3002 of embodiment 3, in which units of a radius of curvature, a thickness, and an effective focal length are millimeters (mm). 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.
TABLE 7
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | -2.7263E-03 | 5.0853E-03 | -1.6068E-02 | 3.1362E-02 | -3.7972E-02 | 2.8199E-02 | -1.2476E-02 | 3.0079E-03 | -3.0041E-04 |
| S2 | 1.4866E-01 | -2.1519E-01 | 3.2003E-01 | -4.0222E-01 | 3.9429E-01 | -2.7925E-01 | 1.3196E-01 | -3.6815E-02 | 4.5415E-03 |
| S3 | 1.4136E-01 | -6.9587E-01 | 1.8970E+00 | -4.2469E+00 | 7.2640E+00 | -8.6316E+00 | 6.5231E+00 | -2.7806E+00 | 4.9953E-01 |
| S4 | 1.6621E-01 | -7.9099E-01 | 2.4483E+00 | -2.0638E+00 | -4.2676E-01 | -7.4101E+00 | 2.5572E+01 | -2.6758E+01 | 9.4745E+00 |
| S5 | 2.4540E-01 | -2.0110E-01 | 1.6926E+00 | -2.6376E+00 | 6.6292E+00 | -3.0954E+01 | 6.6676E+01 | -6.3920E+01 | 2.3354E+01 |
| S6 | 1.8630E-01 | 4.2669E-01 | -3.1812E+00 | 2.1696E+01 | -8.9343E+01 | 2.2489E+02 | -3.4099E+02 | 2.8569E+02 | -1.0184E+02 |
| S7 | 5.9117E-02 | -3.6503E-01 | 7.8783E-01 | -1.0178E+00 | 7.7544E-01 | -3.3914E-01 | 7.8810E-02 | -7.5232E-03 | 0.0000E+00 |
| S8 | 2.3387E-02 | -4.6389E-01 | 9.8398E-01 | -1.1689E+00 | 7.8262E-01 | -2.9211E-01 | 5.6767E-02 | -4.4653E-03 | 0.0000E+00 |
| S9 | -3.6406E-01 | 5.1300E-01 | -5.5087E-02 | -7.8808E-01 | 1.0396E+00 | -6.3001E-01 | 2.0669E-01 | -3.5576E-02 | 2.5274E-03 |
| S10 | -6.3607E-01 | 1.1887E+00 | -1.4511E+00 | 1.1382E+00 | -5.8113E-01 | 1.9239E-01 | -3.9939E-02 | 4.7311E-03 | -2.4388E-04 |
TABLE 8
As shown in fig. 6A to 6B, the plurality of spacers of the optical imaging lens 3001 and the optical imaging lens 3002 each include a first spacer P1, a second spacer P2, a third spacer P3, a third auxiliary spacer P3B, and a fourth spacer P4, respectively. Wherein the first spacer P1 is disposed between the first lens E1 and the second lens E2 and at least partially contacts the image side surface of the first lens E1; the second spacer P2 is disposed between the second lens E2 and the third lens E3 and is at least partially in contact with the image side surface of the second lens E2; the third spacer P3 is disposed between the third lens E3 and the fourth lens E4 and is at least partially in contact with the image side surface of the third lens E3; the third auxiliary spacer P3b is disposed on the image side of the third spacer P3 and is at least partially in contact with the third spacer P3; the fourth spacer P4 is disposed between the fourth lens E4 and the fifth lens E5 and is at least partially in contact with the image side surface of the fourth lens E4. The plurality of spacers can block the entry of external excessive light, so that the lens and the lens barrel are better supported, and the structural stability of the optical imaging lens 3001 and the optical imaging lens 3002 is enhanced.
Table 9 shows basic parameters of the lenses, spacers, and barrels of the optical imaging lens 3001 and the optical imaging lens 3002 of embodiment 3, and each parameter in units of millimeters (mm) in table 9.
| Example parameters | |
|
| d1s | 2.585 | 2.609 |
| d2s | 1.640 | 1.642 |
| d3s | 1.704 | 1.709 |
| d3m | 1.704 | 1.709 |
| D3m | 4.300 | 4.311 |
| d4s | 3.388 | 3.394 |
| D4s | 4.500 | 4.508 |
| d0s | 3.340 | 3.362 |
| d0m | 5.280 | 5.284 |
| EP01 | 0.684 | 0.687 |
| CP1 | 0.274 | 0.626 |
| EP12 | 0.361 | 0.010 |
| EP34 | 0.977 | 0.977 |
| CP4 | 0.018 | 0.022 |
| d3bm | 3.352 | 3.010 |
| CP3b | 0.759 | 0.756 |
| f12 | 5.473 | 5.473 |
| f34 | 8.787 | 8.787 |
| ∑CT | 2.390 | 2.390 |
| ∑AT | 2.171 | 2.171 |
TABLE 9
Fig. 7A shows on-axis chromatic aberration curves of the optical imaging lens 3001 and the optical imaging lens 3002 of embodiment 3, which represent the convergent focus deviation of light rays of different wavelengths after passing through the lenses. Fig. 7B shows astigmatism curves of the optical imaging lens 3001 and the optical imaging lens 3002 of embodiment 3, which represent meridional image plane curvature and sagittal image plane curvature. Fig. 7C shows distortion curves of the optical imaging lens 3001 and the optical imaging lens 3002 of embodiment 3, which represent distortion magnitude values corresponding to different image heights. Fig. 7D shows a chromatic aberration of magnification curve of the optical imaging lens 3001 and the optical imaging lens 3002 of embodiment 3, which represents a deviation of different image heights on an imaging plane after light passes through the lens. As can be seen from fig. 7A to 7D, the optical imaging lens 3001 and the optical imaging lens 3002 given in embodiment 3 can achieve good imaging quality.
Example 4
The optical imaging system 4001 and the optical imaging system 4002 according to embodiment 4 of the present application are described below with reference to fig. 8A to 9D. Fig. 8A to 8B show schematic structural diagrams of an optical imaging system 4001 and an optical imaging system 4002 according to embodiment 4 of the present application, respectively.
As shown in fig. 8A to 8B, the optical imaging system 4001 and the optical imaging system 4002 each include a lens barrel P0, imaging lens groups E1 to E5, and a plurality of spacers P1 to P4.
As shown in fig. 8A to 8B, the optical imaging system 4001 and the optical imaging system 4002 employ the same imaging lens group, which includes, in order from the object side to the image side: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5. The first lens E1 has positive optical power, and has an object side surface S1 and an image side surface S2. The second lens E2 has negative optical power, and has an object side surface S3 and an image side surface S4. The third lens E3 has positive optical power, and has an object side surface S5 and an image side surface S6. The fourth lens element E4 has positive optical power and has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has negative optical power, and has an object side surface S9 and an image side surface S10. The filter has an object side S11 and an image side S12, and light from an object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on an imaging surface S13.
In this example, the f-number Fno of each of the optical imaging lens 4001 and the optical imaging lens 4002 is 2.482; the effective focal lengths f of the optical imaging lens 4001 and the optical imaging lens 4002 are both 6.775mm; the maximum half field angles Semi-FOV of the optical imaging lens 4001 and the optical imaging lens 4002 are 20.190 °.
Table 10 shows basic parameter tables of imaging lens groups of the optical imaging system 4001 and the optical imaging system 4002 of embodiment 4, in which units of a radius of curvature, a thickness, and an effective focal length are each millimeters (mm). 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.
Table 10
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 3.5617E-04 | -1.2328E-02 | 3.5455E-02 | -6.0188E-02 | 6.3381E-02 | -4.2379E-02 | 1.7550E-02 | -4.1187E-03 | 4.2261E-04 |
| S2 | 1.4120E-01 | -1.8491E-01 | 2.1332E-01 | -1.5882E-01 | 4.1706E-02 | 4.3547E-02 | -4.8564E-02 | 1.9383E-02 | -2.9095E-03 |
| S3 | 1.3216E-01 | -6.3091E-01 | 1.6966E+00 | -3.7687E+00 | 6.5067E+00 | -7.9147E+00 | 6.1685E+00 | -2.7261E+00 | 5.1155E-01 |
| S4 | 1.3260E-01 | -6.2421E-01 | 2.0617E+00 | -3.0079E+00 | 1.0691E+01 | -4.3344E+01 | 8.2983E+01 | -7.3384E+01 | 2.4905E+01 |
| S5 | 2.2706E-01 | -2.4645E-01 | 3.0371E+00 | -1.2950E+01 | 5.0445E+01 | -1.3887E+02 | 2.2016E+02 | -1.8136E+02 | 6.0884E+01 |
| S6 | 1.5771E-01 | 1.0386E+00 | -1.0279E+01 | 7.0305E+01 | -2.9741E+02 | 7.8467E+02 | -1.2612E+03 | 1.1308E+03 | -4.3477E+02 |
| S7 | 6.0178E-02 | -3.7000E-01 | 7.8562E-01 | -9.9077E-01 | 7.3799E-01 | -3.1662E-01 | 7.2424E-02 | -6.8251E-03 | 0.0000E+00 |
| S8 | -1.0254E-02 | -3.3598E-01 | 7.6271E-01 | -9.5336E-01 | 6.6076E-01 | -2.5265E-01 | 4.9981E-02 | -3.9837E-03 | 0.0000E+00 |
| S9 | -3.8777E-01 | 6.3826E-01 | -2.7698E-01 | -6.1612E-01 | 9.8867E-01 | -6.3881E-01 | 2.1702E-01 | -3.8235E-02 | 2.7638E-03 |
| S10 | -6.1204E-01 | 1.1715E+00 | -1.4579E+00 | 1.1493E+00 | -5.8536E-01 | 1.9300E-01 | -3.9961E-02 | 4.7366E-03 | -2.4526E-04 |
TABLE 11
As shown in fig. 8A to 8B, the plurality of spacers of the optical imaging system 4001 and the optical imaging system 4002 each include a first spacer P1, a second spacer P2, a third spacer P3, a third auxiliary spacer P3B, and a fourth spacer P4. Wherein the first spacer P1 is disposed between the first lens E1 and the second lens E2 and at least partially contacts the image side surface of the first lens E1; the second spacer P2 is disposed between the second lens E2 and the third lens E3 and is at least partially in contact with the image side surface of the second lens E2; the third spacer P3 is disposed between the third lens E3 and the fourth lens E4 and is at least partially in contact with the image side surface of the third lens E3; the third auxiliary spacer P3b is disposed on the image side of the third spacer P3 and is at least partially in contact with the third spacer P3; the fourth spacer P4 is disposed between the fourth lens E4 and the fifth lens E5 and is at least partially in contact with the image side surface of the fourth lens E4. The plurality of spacers can block the entry of external excessive light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging system 4001 and the optical imaging system 4002 is enhanced.
Table 12 shows basic parameters of lenses, spacers, and barrels of the optical imaging system 4001 and the optical imaging system 4002 of example 4, and each parameter in table 12 has a unit of millimeter (mm).
| Example parameters | |
|
| d1s | 2.567 | 2.649 |
| d2s | 1.653 | 1.657 |
| d3s | 1.724 | 1.730 |
| d3m | 1.724 | 1.730 |
| D3m | 4.288 | 4.283 |
| d4s | 3.378 | 3.380 |
| D4s | 4.486 | 4.562 |
| d0s | 3.311 | 3.380 |
| d0m | 5.327 | 5.347 |
| EP01 | 0.684 | 0.684 |
| CP1 | 0.281 | 0.993 |
| EP12 | 0.361 | 0.010 |
| EP34 | 0.960 | 0.971 |
| CP4 | 0.018 | 0.024 |
| d3bm | 3.292 | 3.129 |
| CP3b | 0.754 | 0.781 |
| f12 | 5.430 | 5.430 |
| f34 | 9.418 | 9.418 |
| ∑CT | 2.360 | 2.360 |
| ∑AT | 2.161 | 2.161 |
Table 12
Fig. 9A shows on-axis chromatic aberration curves of the optical imaging system 4001 and the optical imaging system 4002 of embodiment 4, which represent convergent focus deviations of light rays of different wavelengths after passing through a lens. Fig. 9B shows astigmatism curves of the optical imaging system 4001 and the optical imaging system 4002 of embodiment 4, which represent meridional image plane curvature and sagittal image plane curvature. Fig. 9C shows distortion curves of the optical imaging system 4001 and the optical imaging system 4002 of embodiment 4, which represent distortion magnitude values corresponding to different image heights. Fig. 9D shows a magnification chromatic aberration curve of the optical imaging system 4001 and the optical imaging system 4002 of embodiment 4, which represents deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 9A to 9D, the optical imaging system 4001 and the optical imaging system 4002 given in embodiment 4 can achieve good imaging quality.
In summary, the optical imaging lenses 1001, 1002, 2001, 2002, 3001, 3002, 4001, and 4002 of embodiment 1 to embodiment 4 satisfy the relationship shown in table 13.
| Condition/example | 1001 | 1002 | 2001 | 2002 | 3001 | 3002 | 4001 | 4002 |
| (R4/d2s+R5/d3s)×Fno | 17.811 | 17.931 | 19.421 | 18.811 | 9.039 | 9.017 | 9.032 | 9.004 |
| (CT1-EP01)/T12 | 4.928 | 4.928 | 6.876 | 6.876 | 1.920 | 1.909 | 1.908 | 1.908 |
| f12/d1s+f34/d3s | -2.429 | -2.546 | -2.201 | -2.133 | 7.274 | 7.240 | 7.578 | 7.494 |
| (R5/R6)×(d3bm/d3m) | 5.741 | 5.779 | 6.046 | 5.782 | 1.944 | 1.741 | 1.940 | 1.838 |
| |R10/f5|×(EP34/CT4) | 2.151 | 2.494 | 2.445 | 2.909 | 10.755 | 10.755 | 11.808 | 11.943 |
| (f2+f5)/(EP12+EP34) | -10.222 | -11.733 | -10.018 | -11.242 | -5.255 | -7.124 | -5.370 | -7.231 |
| |f1×f4|/(d1s×d4s) | 14.168 | 13.368 | 10.866 | 9.470 | 2.889 | 2.857 | 3.040 | 2.944 |
| (D4s+d4s)/(T23+CT5) | 20.521 | 20.441 | 19.288 | 21.497 | 26.483 | 26.530 | 26.825 | 27.091 |
| (D3m+d3m)/(R6+R7) | 10.892 | 10.819 | 7.652 | 7.710 | 2.650 | 2.657 | 2.840 | 2.840 |
| EP34/CT4+D4s/(T23+CT3) | 12.281 | 12.554 | 11.783 | 13.442 | 15.402 | 15.426 | 15.497 | 15.748 |
| ∑CT/CP1+∑AT/CP3b | 14.270 | 7.584 | 14.313 | 8.474 | 11.584 | 6.690 | 11.265 | 5.144 |
| f1/(d0s+d0m) | 0.344 | 0.346 | 0.337 | 0.337 | 0.331 | 0.330 | 0.329 | 0.326 |
| f2/(d0s+d0m) | -0.770 | -0.774 | -0.713 | -0.712 | -0.400 | -0.399 | -0.403 | -0.399 |
| f3/(d0s+d0m) | -0.876 | -0.880 | -0.889 | -0.887 | 20.261 | 20.200 | 101.807 | 100.769 |
| f4/(d0s+d0m) | -4.839 | -4.861 | -3.798 | -3.792 | 1.030 | 1.027 | 1.073 | 1.062 |
| f5/(d0s+d0m) | -0.748 | -0.751 | -0.759 | -0.758 | -0.416 | -0.414 | -0.419 | -0.414 |
| d2s/T12 | 13.691 | 13.599 | 18.571 | 18.777 | 6.324 | 6.332 | 6.431 | 6.447 |
| d3s/T12 | 13.800 | 13.708 | 19.096 | 19.826 | 6.571 | 6.590 | 6.708 | 6.731 |
| d4s/T12 | 28.757 | 28.698 | 39.401 | 43.166 | 13.065 | 13.088 | 13.143 | 13.151 |
TABLE 13
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 also covers other technical solutions which may be formed by any combination of the features described above or their equivalents without departing from the inventive concept. 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 (13)
1. An optical imaging lens, comprising: a lens barrel and a lens group disposed in the lens barrel;
the lens group comprises a first lens with positive focal power, a second lens with negative focal power, a third lens, a fourth lens and a fifth lens with negative focal power, which are sequentially arranged from an object side to an image side along an optical axis; and
The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d0s of the object side end of the lens barrel, and the inner diameter d0m of the image side end of the lens barrel satisfy the following conditions: -5< fi/(d0s+d0m) <102, where i=1, 2, 3, 4 or 5.
2. The optical imaging lens of claim 1, wherein the optical imaging lens further comprises:
a second spacer disposed between the second lens and the third lens and at least partially contacting an image side surface of the second lens; and
a third spacer disposed between the third lens and the fourth lens and at least partially in contact with an image side surface of the third lens; wherein,,
the curvature radius R4 of the image side surface of the second lens, the curvature radius R5 of the object side surface of the third lens, the inner diameter d2s of the object side surface of the second spacer, the inner diameter d3s of the object side surface of the third spacer, and the f-number Fno of the optical imaging lens satisfy: 9< (R4/d2s+R5/d3s) ×FNo <20.
3. The optical imaging lens of claim 1, wherein the optical imaging lens further comprises:
A first spacer disposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens; wherein,,
the distance EP01 from the object side end of the lens barrel to the object side surface of the first spacer along the optical axis direction, the center thickness CT1 of the first lens on the optical axis, and the air interval T12 between the first lens and the second lens on the optical axis satisfy: 1< (CT 1-EP 01)/T12 <7.
4. The optical imaging lens of any of claims 1 to 3, further comprising:
a first spacer disposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens;
a third spacer disposed between the third lens and the fourth lens and at least partially in contact with an image side surface of the third lens; wherein,,
the combined focal length f12 of the first lens and the second lens, the combined focal length f34 of the third lens and the fourth lens, the inner diameter d1s of the object side surface of the first spacer and the inner diameter d3s of the object side surface of the third spacer satisfy: -3< f12/d1s+f34/d3s <8.
5. The optical imaging lens of any of claims 1 to 3, further comprising:
A third spacer disposed between the third lens and the fourth lens and at least partially in contact with an image side surface of the third lens;
a third auxiliary spacer disposed on an image side of the third spacer and at least partially contacting the image side of the third spacer; wherein,,
the radius of curvature R5 of the object-side surface of the third lens, the radius of curvature R6 of the image-side surface of the third lens, the inner diameter d3bm of the image-side surface of the third auxiliary spacer, and the inner diameter d3m of the image-side surface of the third spacer satisfy: 1< (R5/R6) × (d 3bm/d3 m) <7.
6. The optical imaging lens of claim 1, wherein the optical imaging lens further comprises:
a third spacer disposed between the third lens and the fourth lens and at least partially in contact with an image side surface of the third lens;
a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with an image side surface of the fourth lens; wherein,,
the radius of curvature R10 of the image side surface of the fifth lens, the effective focal length f5 of the fifth lens, the spacing distance EP34 between the third spacer and the fourth spacer along the optical axis direction, and the center thickness CT4 of the fourth lens on the optical axis satisfy: 1< |R10/f5|× (EP 34/CT 4) <15.
7. The optical imaging lens of claim 1, wherein the optical imaging lens further comprises:
a first spacer disposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens;
a second spacer disposed between the second lens and the third lens and at least partially contacting an image side surface of the second lens;
a third spacer disposed between the third lens and the fourth lens and at least partially in contact with an image side surface of the third lens;
a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with an image side surface of the fourth lens; wherein,,
the spacing distance EP12 between the first spacer and the second spacer along the optical axis direction, the spacing distance EP34 between the third spacer and the fourth spacer along the optical axis direction, the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy: -12< (f2+f5)/(EP 12+ep 34) < -4.
8. The optical imaging lens of claim 1, wherein at least one lens in the lens group has a refractive index greater than 1.6, the optical imaging lens satisfying: 5< djs/T12<45, where j=2, 3 or 4, djs is the inner diameter of the object side of a spacer located on the image side of a lens having a refractive index greater than 1.6 and at least partially in contact with the image side of a lens having a refractive index greater than 1.6, T12 is the air separation of the first and second lenses on the optical axis;
Where j is 2, d2s represents an inner diameter of an object side surface of a second spacer disposed on and at least partially contacting an image side surface of the second lens;
when j is taken to be 3, d3s represents the inner diameter of the object side surface of the third spacer which is placed on the image side of the third lens and is at least partially in contact with the image side surface of the third lens; and
when j is taken to be 4, d4s denotes an inner diameter of an object side surface of a fourth spacer which is placed on an image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens.
9. The optical imaging lens of any of claims 1, 6-8, wherein the optical imaging lens further comprises:
a first spacer disposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens;
a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with an image side surface of the fourth lens; wherein,,
the effective focal length f1 of the first lens, the effective focal length f4 of the fourth lens, the inner diameter d1s of the object side surface of the first spacer and the inner diameter d4s of the object side surface of the fourth spacer satisfy: 2< |f1×f4|/(d1s×d4s) <15.
10. The optical imaging lens of any of claims 1, 6-8, wherein the optical imaging lens further comprises:
a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with an image side surface of the fourth lens; wherein,,
an inner diameter D4s of the object side surface of the fourth spacer, an outer diameter D4s of the object side surface of the fourth spacer, an air interval T23 of the second lens and the third lens on the optical axis, and a center thickness CT5 of the fifth lens on the optical axis satisfy: 18< (d4s+d4s)/(T23+CT5) <28.
11. The optical imaging lens of any of claims 1, 6-8, wherein the optical imaging lens further comprises:
a third spacer disposed between the third lens and the fourth lens and at least partially in contact with an image side surface of the third lens; wherein,,
the radius of curvature R5 of the object-side surface of the third lens, the radius of curvature R6 of the image-side surface of the third lens, the inner diameter D3m of the image-side surface of the third spacer and the outer diameter D3m of the image-side surface of the third spacer satisfy: 2< (d3m+d3m)/(r5+r6) <12.
12. The optical imaging lens of any of claims 1, 6-8, wherein the optical imaging lens further comprises:
A third spacer disposed between the third lens and the fourth lens and at least partially in contact with an image side surface of the third lens; and
a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with an image side surface of the fourth lens;
the distance EP34 between the third spacer and the fourth spacer along the optical axis direction, the outer diameter D4s of the object side surface of the fourth spacer, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the air distance T23 between the second lens and the third lens on the optical axis satisfy: 10< EP34/CT4+D4s/(T23+CT3) <17.
13. The optical imaging lens of any of claims 1, 6-8, wherein the optical imaging lens further comprises:
a first spacer disposed between the first lens and the second lens and at least partially contacting an image side surface of the first lens;
a third spacer disposed between the third lens and the fourth lens and at least partially in contact with an image side surface of the third lens;
a third auxiliary spacer disposed on an image side of the third spacer and at least partially contacting the image side of the third spacer; wherein,,
The sum Σct of the center thicknesses of the first to fifth lenses on the optical axis, the sum Σat of the air intervals between any adjacent two lenses of the first to fifth lenses on the optical axis, the maximum thickness CP1 of the first separator in the optical axis direction, and the maximum thickness CP3b of the third auxiliary separator in the optical axis direction satisfy: 5< ΣCT/CP1+ ΣAT/CP3b <15.
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