CN113866956A - Optical lens system, image capturing device and electronic equipment - Google Patents
Optical lens system, image capturing device and electronic equipment Download PDFInfo
- Publication number
- CN113866956A CN113866956A CN202111284927.9A CN202111284927A CN113866956A CN 113866956 A CN113866956 A CN 113866956A CN 202111284927 A CN202111284927 A CN 202111284927A CN 113866956 A CN113866956 A CN 113866956A
- Authority
- CN
- China
- Prior art keywords
- lens
- lens system
- optical lens
- optical
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
Abstract
The application provides an optical lens system, an image capturing device and an electronic device. The optical lens system provided by the application comprises the following components in sequence from an object side to an image side: a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with negative refractive power, a fourth lens element with positive refractive power, a fifth lens element with positive refractive power, and a sixth lens element with negative refractive power; wherein the optical lens system satisfies the following conditional expression: l tan (hfov) |/TTL > 0.13; and 0.6< f1/f < 1.0; -4.0< f2/f < -1; f3/f < -1; wherein, HFOV is half of the horizontal field angle of the optical lens system, TTL is the length on the optical axis from the object-side surface of the first lens to the image plane, f is the effective focal length of the optical lens system, 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. The optical lens system has better imaging effect while ensuring miniaturization and ultra-thinning, realizes the characteristic of ultra-large wide angle, and improves the imaging quality.
Description
Technical Field
The present disclosure relates to optical lens technologies, and particularly to an optical lens system, an image capturing device with the optical lens system, and an electronic apparatus with the image capturing device.
Background
With the development of technologies such as portable intelligent electronic products, automatic driving of automobiles, human-computer interfaces and games, industrial machine vision and measurement, security monitoring and the like, higher requirements are put forward on the technology of photographic lenses on the devices so as to meet the functions of the devices. The existing photographic lens generally optimizes all light rays in a diaphragm so as to ensure that all incident light rays can achieve a focusing effect on hardware; however, the conventional photographic lens system is too long in total length and cannot meet the requirement of miniaturization of the device.
Disclosure of Invention
In view of this, embodiments of the present application provide an optical lens system, which has a short total length and can well meet the requirement of an image capturing device for miniaturization; it is also necessary to provide an image capturing device using the optical lens system; it is also necessary to provide an electronic device using the image capturing apparatus.
The present disclosure provides an optical lens system, sequentially from an object side to an image side, comprising:
a first lens element with positive refractive power;
a second lens element with negative refractive power;
a third lens element with negative refractive power;
a fourth lens element with positive refractive power;
a fifth lens element with positive refractive power; and
a sixth lens element with negative refractive power;
wherein the optical lens system satisfies the following conditional expression:
l tan (hfov) |/TTL > 0.13; and 0.6< f1/f < 1.0; -4.0< f2/f < -1; f3/f < -1;
wherein HFOV is half of the horizontal field angle of the optical lens system, TTL is the length of the first lens from the object-side surface to the image plane on the optical axis, f is the effective focal length of the optical lens system, 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.
The optical lens system performs strong optimization on a part of light rays in the middle of the diaphragm, so that the part of light rays of the optical lens system close to the optical axis reaches a better strong focusing state, and the optical lens system is favorable for having a better imaging effect; in addition, the optical lens system in the application is under the same aperture, the space height of the optical lens system can be greatly reduced, namely the total length of the optical lens system is shorter; clear images can be obtained by combining the light rays of the optical lens system with an image processing algorithm at the rear end. Consequently, can realize the miniaturization and the ultra-thinness of optical lens system, just optical lens system's angle of vision promotes in prior art relatively to make this application optical lens system has better imaging effect when guaranteeing miniaturization and ultra-thinization, realizes the characteristic of super large wide angle, has promoted imaging quality.
In some embodiments, an object-side surface and an image-side surface of any one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are aspheric, and an aspheric formula of a surface type z of each aspheric lens is as follows:
wherein z is the rise of the distance from the vertex of the aspheric surface when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, wherein c is 1/R, and the paraxial curvature c is the reciprocal of the curvature radius R; k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface.
In some embodiments, the object-side surface of the first lens element is convex and the image-side surface of the first lens element is concave.
In some embodiments, the object side surface of the second lens is concave at the paraxial region; the image side surface of the second lens is a concave surface.
In some embodiments, the object-side surface of the third lens element is concave and the image-side surface of the third lens element is convex.
In some embodiments, the object-side surface of the fourth lens element is concave and the image-side surface of the fourth lens element is convex.
In some embodiments, the object-side surface of the fifth lens is convex at the paraxial region; the image-side surface of the fifth lens element is concave at the paraxial region.
In some embodiments, an object side surface of the sixth lens element is concave at a paraxial region; the image-side surface of the sixth lens element is concave at the paraxial region.
In some embodiments, the optical lens system further comprises an aperture that surrounds an object side surface of the first lens.
In some embodiments, the optical lens system satisfies the following conditional expression:
80°≤HFOV≤95°；
wherein the HFOV is half of a horizontal field angle of the optical lens system.
In some embodiments, the optical lens system satisfies the following conditional expression:
5.7mm≤TTL≤6.1mm；
wherein, TTL is a length on the optical axis from the object side surface of the first lens element to the image plane.
In some embodiments, the optical lens system satisfies the following conditional expression:
5.2mm≤f≤5.5mm；
wherein f is the focal length of the optical lens system.
In some embodiments, the optical lens system satisfies the following conditional expression:
4.0mm≤f1≤6.0mm；
wherein f1 is the effective focal length of the first lens.
In some embodiments, the optical lens system satisfies the following conditional expression:
-25.0mm≤f2≤-5.0mm；
wherein f2 is the effective focal length of the second lens.
In some embodiments, the optical lens system satisfies the following conditional expression:
-100.0mm≤f3≤-40.0mm；
wherein f3 is the effective focal length of the third lens.
The embodiment of the present application further provides an image capturing device, which includes the above optical lens system and a photosensitive element, where the photosensitive element is located on an image side of the optical lens system.
The image capturing device is small in thickness and can be used for preparing an ultrathin image capturing device; the image capturing device has a wider field angle and imaging quality while ensuring miniaturization.
The embodiment of the present application further provides an electronic device, which includes a device main body and the image capturing device, where the image capturing device is installed on the device main body.
The application discloses electronic equipment's getting for instance device thickness is little, is favorable to reducing electronic equipment's volume.
Drawings
To more clearly illustrate the structural features and effects of the present application, a detailed description is given below in conjunction with the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of an optical lens system according to a first embodiment of the present application;
FIG. 2 is a longitudinal spherical difference plot for the optical lens system of FIG. 1;
FIG. 3 is a field curvature graph of the optical lens system of FIG. 1;
FIG. 4 is a graph of F-Tan (theta) distortion of the optical lens system of FIG. 1;
FIG. 5 is a schematic structural diagram of an optical lens system according to a second embodiment of the present application;
FIG. 6 is a longitudinal spherical difference plot for the optical lens system of FIG. 5;
FIG. 7 is a field curvature graph of the optical lens system of FIG. 5;
FIG. 8 is a graph of F-Tan (theta) distortion of the optical lens system of FIG. 5;
fig. 9 is a schematic structural diagram of an image capturing apparatus according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments that can be derived by a person skilled in the art from the embodiments given herein without making any creative effort shall fall within the protection scope of the present application.
It should be noted that reference herein to "an embodiment" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The terms "first" and "second" appearing in the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 and 5, the optical lens system of the embodiment of the present application is suitable for an ultra-wide angle lens, and in particular, the optical lens system is suitable for a lens of a camera device such as a mobile phone, a computer, a tablet computer, a vehicle, a monitor, a security, a medical device, a game machine, a robot, and the like. The optical lens system includes, in order from an object side to an image side, a first lens element 20 with positive refractive power, a second lens element 30 with negative refractive power, a third lens element 40 with negative refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with positive refractive power, and a sixth lens element 80 with negative refractive power; wherein the optical lens system satisfies the following conditional expression:
l tan (hfov) |/TTL > 0.13; and 0.6< f1/f < 1.0; -4.0< f2/f < -1; f3/f < -1;
wherein the HFOV is half of a horizontal field angle of the optical lens system, specifically, half of a maximum field angle of the ultra-wide angle lens; TTL is a length of the object-side surface 22 of the first lens element 20 to the image plane 102 on the optical axis L, f is an effective focal length of the optical lens system, f1 is an effective focal length of the first lens element 20, f2 is an effective focal length of the second lens element 30, and f3 is an effective focal length of the third lens element 40.
In the optical lens system of the present application, | tan (hfov) |/TTL >0.13, and 0.6< f1/f < 1.0; -4.0< f2/f < -1; f3/f < -1; therefore, the optical lens system can carry out strong optimization on the part of light rays in the middle of the diaphragm of the optical lens system, the part of light rays of the optical lens system close to the optical axis reaches a better strong focusing state, and the optical lens system carries out a weak focusing state on the other part of light rays around the diaphragm of the optical lens system, so that the optical lens system has a better imaging effect; in addition, the optical lens system in the present application has the advantages that the spatial height of the optical lens system can be greatly reduced under the same aperture, that is, the total system length of the optical lens system is shorter, that is, the TTL ratio is shorter; clear images can be obtained by combining the light rays of the optical lens system with image processing algorithms at the rear end, wherein the image processing algorithms comprise a deconvolution algorithm, a deep learning algorithm and the like. Specifically, the TTL ratio can be reduced from about 0.65 in the prior art to about 0.57; the TTL ratio is equal to a ratio of a total system length of the optical lens system to a diagonal length of the sensor, i.e., TTL ratio is the total system length of the optical lens system/the diagonal length of the sensor. Consequently, can realize the miniaturization and the ultra-thinness of optical lens system, just optical lens system's angle of vision promotes in prior art relatively to make this application optical lens system has better imaging effect when guaranteeing miniaturization and ultra-thinization, realizes the characteristic of super large wide angle, has promoted imaging quality.
In the optical lens system, the first lens element 20 may be made of glass or plastic, preferably glass; the first lens element 20 has an object-side surface 22 and an image-side surface 24, and the first lens element 20 has positive refractive power. The object-side surface 22 of the first lens element 20 is convex, and the image-side surface 24 of the first lens element 20 is concave. First lens 20 can replace the cover plate glass of super wide-angle lens front side, has reduced the inner space that optical lens system occupy electronic equipment, thereby can save electronic equipment's space is favorable to electronic equipment's miniaturization, and convenient the overall arrangement of other components in the electronic equipment. The image side surface 24 is a concave surface, so that light rays reflected by a photographed object can be effectively acquired by the optical lens system, and the convergence of light rays outside the optical axis L in a visual field can be enhanced to enter an imaging surface of the optical lens system. In some embodiments, the object side 22 of the first lens 20 is convex; the image side surface 24 of the first lens element 20 is concave at a paraxial region and flat at a peripheral region.
In the optical lens system, the second lens element 30 may be made of glass or plastic, and has an object-side surface 32 and an image-side surface 34; the second lens element 30 has negative refractive power. In one embodiment, the object side surface 32 of the second lens element 30 is concave at the paraxial region L; the image-side surface 34 of the second lens element 30 is concave. The diameter of the second lens 30 is smaller than that of the first lens 20, and a projection of the outer peripheral wall of the second lens 30 on the image side surface 24 of the first lens 20 along the optical axis L is located on a concave surface of the image side surface 24. In some embodiments, the object side surface 32 of the second lens element 30 is concave at the paraxial region L and convex at the periphery. In some embodiments, the diameter of the second lens 30 may also be equal to the diameter of the first lens 20, and the image-side surface 24 of the first lens 20 is concave.
In the optical lens system, the third lens element 40 may be made of glass or plastic, and has an object-side surface 42 and an image-side surface 44; the third lens element 40 with negative refractive power. The object-side surface 42 of the third lens element 40 is concave, and the image-side surface 44 of the third lens element 40 is convex; in one embodiment, the object side surface 42 is concave near the optical axis L and is flat at the circumference. The diameter of the third lens 40 is equal to the diameter of the second lens 30.
In the optical lens system, the fourth lens element 50 may be made of glass or plastic, and has an object-side surface 52 and an image-side surface 54; the fourth lens element 50 with positive refractive power. The object-side surface 52 of the fourth lens element 50 is concave, and the image-side surface 54 of the fourth lens element 50 is convex. The diameter of the fourth lens 50 is larger than that of the third lens 40, and specifically, a projection of the peripheral wall of the third lens 40 on the object side surface 52 of the fourth lens 50 along the optical axis L is located on a concave surface of the object side surface 52. In some embodiments, object side surface 52 is concave near optical axis L and may be flat at the circumference.
In the optical lens system, the fifth lens element 60 may be made of glass or plastic, and has an object-side surface 62 and an image-side surface 64; the fifth lens element 60 with positive refractive power. The object-side surface 62 of the fifth lens element 60 is convex at the paraxial region L; the image-side surface 64 of the fifth lens element 60 is concave at the paraxial region L. The diameter of the fifth lens 60 is larger than that of the fourth lens 50, and a projection of the peripheral wall of the fourth lens 50 on the object side surface 62 of the fifth lens 60 along the optical axis L is located on a concave surface of the object side surface 62. In some embodiments, the fifth lens element 60 has a concave surface at the circumference of the object side surface 62 and a convex surface at the circumference of the image side surface 64. In some embodiments, the object-side surface 62 of the fifth lens element 60 is convex at the paraxial region L, concave at the periphery, convex at the periphery, and concave at the end.
In the optical lens system, the sixth lens element 70 may be made of glass or plastic, and has an object-side surface 72 and an image-side surface 74; the sixth lens element 70 has negative refractive power. The object side 72 of the sixth lens element 70 is concave at the paraxial region L; the image-side surface 74 of the sixth lens element 70 is concave at the paraxial region L, and the circumference of the image-side surface 74 is convex. The diameter of the sixth lens 70 is larger than that of the fifth lens 60, and a projection of the outer peripheral wall of the sixth lens 70 on the object-side surface 72 of the seventh lens 70 along the optical axis L is located on a convex surface of the object-side surface 72. In some embodiments, the object side surface 72 of the sixth lens element 70 is concave at the paraxial region L and convex at the periphery. In some embodiments, the object-side surface 72 of the seventh lens element 70 is concave at the paraxial region L, convex at the periphery, and planar.
In the present application, the first lens 20, the second lens 30, the third lens 40, the fourth lens 50, the fifth lens 60 and the sixth lens 70 are designed in a matched manner to optimize aberration of the optical lens system, so that aberration of the optical lens system is optimized to be minimum, thereby improving imaging quality of the optical lens system; and the total length of the optical lens system is shortened so as to meet the development trend of ultra-thinness and miniaturization of the optical lens system.
In some embodiments, the first lens 20, the second lens 30, the third lens 40, the fourth lens 50, the fifth lens 60, and the sixth lens 70 include glass lenses and plastic lenses. For example, the first lens 20 is a glass lens; the second lens 30, the third lens 40, the fourth lens 50, the fifth lens 60, and the sixth lens 70 are all plastic lenses. The first lens 20 closest to the object side is made of glass, so that the first lens can better resist the influence of the ambient temperature on the object side, and meanwhile, the second lens 30, the third lens 40, the fourth lens 50, the fifth lens 60 and the sixth lens 70 are plastic lenses, so that the weight of the optical lens system can be well reduced, and the production cost can be well reduced. In addition, the optical lens system in which the glass lens and the plastic lens are mixed has higher light transmittance and more stable chemical properties than an optical lens system including only the plastic lens, and can improve imaging quality at different light and dark contrasts.
In some embodiments, the first lens 20, the second lens 30, the third lens 40, the fourth lens 50, the fifth lens 60, and the sixth lens 70 are all aspheric lenses. The aspheric lens is beneficial to correcting the aberration of the optical lens system and improving the imaging quality of the optical lens system. Can be easily manufactured into shapes other than spherical surfaces, obtain more control variables, obtain good imaging by using fewer lenses, further reduce the number of lenses and meet the requirement of miniaturization. "aspherical lens" refers to a lens at least one side of which is aspherical.
When the object-side surface and/or the image-side surface of the first lens 20, the second lens 30, the third lens 40, the fourth lens 50, the fifth lens 60, and the sixth lens 70 are aspheric, the profile z of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:
wherein z is the rise of the distance from the vertex of the aspheric surface when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, and c is 1/R (the paraxial curvature c is the reciprocal of the curvature radius R); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface.
In the aforementioned optical lens system of the present application, the optical lens system further preferably includes an aperture stop 80, and specifically, the aperture stop 80 is disposed around the object-side surface 22 of the first lens element 20. Preferably, the aperture value of the optical lens system is 1.88, wherein the aperture number size of the strong focus in the center of the optical lens system is 2.35.
In the aforementioned optical lens system of the present application, preferably, the optical lens system further includes an infrared cut filter 90. The infrared cut filter 90 is located between the sixth lens 70 and the image plane 102. The infrared cut filter 90 has a first face 92 and a second face 94. The infrared cut-off filter 90 may be made of glass or an optical film, and the infrared cut-off filter 90 is used for cutting off infrared rays to realize high transmittance of visible light, so as to block infrared rays interfering with imaging quality, prevent the infrared rays from passing through a lens of the image pickup device to cause picture distortion, and enable a formed image to better conform to the feeling of human eyes.
In the aforementioned optical lens system of the present application, preferably, the optical lens system further includes a protective glass, and the protective glass covers the sensor; the protective glass is used for protecting the inductor.
In some embodiments, the optical lens system satisfies the following conditional expression:
80°≤HFOV≤95°；
wherein the HFOV is half of a horizontal field angle of the optical lens system. Specifically, the HFOV of the optical lens system described herein may be, but is not limited to, 86 °, 88.2 °, etc.; more specifically, the optical lens system described herein satisfies: the HFOV is more than or equal to 80 degrees and less than or equal to 95 degrees, namely the HFOV is more than or equal to 80 degrees and less than or equal to 95 degrees.
When the HFOV is greater than 80 °, the field angle of the optical lens system is greater than 160 ° to be suitable for the requirement of an ultra-wide angle lens.
In some embodiments, the optical lens system satisfies the following conditional expression:
5.7mm≤TTL≤6.1mm；
wherein, TTL is a length from the object-side surface 22 of the first lens element 20 to the image plane 102 on the optical axis L.
That is, TTL can be any value between 5.7mm and 6.1mm, e.g., 5.95mm, 5.85mm, etc.
When TTL is less than 6.1mm, the total length of the optical lens system is compressed, and the requirement of ultra-thinning of the image capturing device can be well met. The total length of the optical lens system is smaller than 6.1mm, and the requirement for ultra-thinning of the image capturing device can be well met.
In one embodiment, the optical lens system has a TTL of 5.95 mm.
In some embodiments, the optical lens system satisfies the following conditional expression:
5.2mm≤f≤5.5mm；
wherein f is the focal length of the optical lens system.
That is, f may be any value between 5.2mm and 5.5mm, such as 5.36mm, 5.40mm, etc.
In an embodiment, f of the optical lens system is 5.36 mm.
When f is less than 5.5mm, the total length of the optical lens system is fully compressed, and the requirement of ultra-thinning of the image capturing device can be well met.
In some embodiments, the optical lens system satisfies the following conditional expression:
4.0mm≤f1≤6.0mm；
wherein f1 is the effective focal length of the first lens.
That is, f1 may be any value between 4.0mm and 6.0mm, e.g., f1 may be 4.7mm, 5.0mm, etc.
In one embodiment, the optical lens system has an f1 of 4.7 mm.
In one embodiment, the optical lens system satisfies the following conditional expression:
-25.0mm≤f2≤-5.0mm；
wherein f2 is the effective focal length of the second lens.
That is, f2 can be any value between-25.0 mm and-5.0 mm, e.g., -16.1mm, -20.0mm, etc., for f 2.
In one embodiment, f2 of the optical lens system is-16.1 mm.
In some embodiments, the optical lens system satisfies the following conditional expression:
-100.0mm≤f3≤-40.0mm；
wherein f3 is the effective focal length of the third lens.
That is, f3 can be any value between-100.0 mm and-40.0 mm, e.g., -64.6mm, -75.0mm, etc., for f 3.
In one embodiment, the optical lens system has an f3 of-64.6 mm.
The optical lens system has high imaging quality by reasonably configuring the optical powers of the first lens element 20 to the sixth lens element 60 and combining an image processing algorithm at the rear end of the optical lens system to obtain a clear image through the positive refractive power provided by the first lens element 20, the negative refractive power provided by the second lens element 30, the negative refractive power provided by the third lens element 40, the positive refractive power provided by the fourth lens element 50, the positive refractive power provided by the fifth lens element 60 and the negative refractive power provided by the sixth lens element 70.
The optical lens system 100 of the present application is described in further detail below with reference to specific embodiments.
First embodiment
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of an optical lens system 100 according to a first embodiment of the present application; FIG. 2 is a longitudinal spherical aberration plot for the optical lens system 100 of FIG. 1; FIG. 3 is a field curvature graph of the optical lens system 100 of FIG. 1; fig. 4 is a graph of F-tan (theta) distortion of the optical lens system 100 of fig. 1. As can be seen from fig. 1, the optical lens system 100 of the present embodiment includes, in order from an object side to an image side, a stop 80, a first lens element 20 with positive refractive power, a second lens element 30 with negative refractive power, a third lens element 40 with negative refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with negative refractive power, a sixth lens element 70 with negative refractive power, an ir-cut filter 90 and an image plane 102.
The aperture 80 is disposed around the object side surface 22 of the first lens element 20, and the aperture value of the optical lens system 100 is 1.88, wherein the aperture size of the central strong focus of the optical lens system 100 is 2.35.
The first lens element 20 is made of glass and has an object-side surface 22 and an image-side surface 24. The object side surface 22 is convex; the image-side surface 24 is concave near the optical axis L.
The second lens element 30 is made of plastic and has an object-side surface 32 and an image-side surface 34. The object-side surface 32 may be concave near the optical axis L and convex at the circumference; the image side 34 is concave. The diameter of the second lens 30 is smaller than that of the first lens 20, and a projection of the outer peripheral wall of the second lens 30 on the image side surface 24 of the first lens 20 along the optical axis L is located on a concave surface of the image side surface 24.
The third lens element 40 is made of plastic and has an object-side surface 42 and an image-side surface 44. The object side surface 42 of the third lens element 40 is concave near the optical axis L and is flat at the circumference; the image side surface 44 is convex; the diameter of the third lens 40 is equal to the diameter of the second lens 30.
The fourth lens element 50 is made of plastic and has an object-side surface 52 and an image-side surface 54. The object side surface 52 is concave near the optical axis L and is a plane at the circumference; the image-side surface 54 is convex near the optical axis L and concave at the circumference. The diameter of the fourth lens 50 is larger than that of the third lens 40, and the projection of the peripheral wall of the third lens 40 on the object side surface 54 of the fourth lens 50 along the optical axis L is located on the concave surface of the fourth lens 50.
The fifth lens element 60 is made of plastic and has an object-side surface 62 and an image-side surface 64. The object side surface 62 is convex at a position close to the optical axis L, and the circumference is concave at first and then convex; the image-side surface 64 is concave near the optical axis L and convex at the circumference. The diameter of the fifth lens 60 is larger than that of the fourth lens 50, and a projection of the peripheral wall of the fourth lens 50 on the object side surface 62 of the fifth lens 60 along the optical axis L is located on a concave surface of the object side surface 62.
The sixth lens element 70 is made of plastic and has an object-side surface 72 and an image-side surface 74. The object side surface 72 is concave near the optical axis L, and the circumference is convex and then plane; the image-side surface 74 is concave near the optical axis L and convex at the circumference. The diameter of the sixth lens 70 is larger than that of the fifth lens 60, and a projection of the outer peripheral wall of the fifth lens 70 on the object side surface 72 of the sixth lens 70 along the optical axis L is located on a convex surface of the object side surface 72.
In the first embodiment, the design parameters of the first lens 20 to the sixth lens 70 of the optical lens system 100 are shown in tables 1 and 2 below.
In the first embodiment, the parameters of each aspheric surface of the optical lens system 100 are shown in the following table 2:
FOV in table 1 is a diagonal field angle of the optical lens system 100, and FNO is an f-number of the optical lens system.
Table 2 shows the aspherical data of the first embodiment, wherein a4-a20 are aspherical coefficients of 4 th to 20 th orders on the respective surfaces.
Based on the foregoing design, the system focal Length f Of the first embodiment Of the present application is 5.36mm, the system Length (TTL) is 5.95mm, the Field angle (FOV) at the maximum image height is 172.0 degrees, and the aperture value (f-number) is 1.88. As can be seen from fig. 1 to 4, the optical lens system 100 in the first embodiment of the present application is beneficial to ensure that a portion of light rays of the lens has a good effect, and at the same time, the system length of the optical lens system 100 is greatly reduced, so that the miniaturization of the optical lens system 100 can be satisfied, various aberrations can be effectively corrected, and the imaging quality is high.
Second embodiment
Referring to fig. 5 to 8, fig. 5 is a schematic structural diagram of an optical lens system 100a according to a second embodiment of the present application; FIG. 6 is a longitudinal spherical difference plot for the optical lens system 100a of FIG. 5; FIG. 7 is a field curvature graph of the optical lens system 100a of FIG. 5; fig. 8 is a graph of F-tan (theta) distortion of the optical lens system 100a of fig. 5. As shown in fig. 5, the optical lens system 100a of the present embodiment includes, in order from an object side to an image side, a stop 80, a first lens element 20 with negative refractive power, a second lens element 30 with negative refractive power, a third lens element 40 with negative refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with negative refractive power, a sixth lens element 70 with negative refractive power, an ir-cut filter 90 and an image plane 102.
The aperture 80 is disposed around the object side surface 22 of the first lens element 20.
The first lens element 20 is made of plastic and has an object-side surface 22 and an image-side surface 24. The object side surface 22 is convex; the image side 24 is concave.
The second lens element 30 is made of plastic and has an object-side surface 32 and an image-side surface 34. The object-side surface 32 may be concave near the optical axis L and convex at the circumference; the image side 34 is concave. The diameter of the second lens 30 is smaller than the diameter of the first lens 20, and a projection of the outer peripheral wall of the second lens 30 on the image side surface 24 of the first lens 20 along the optical axis L is located on a concave surface of the image side surface 24.
The third lens element 40 is made of plastic and has an object-side surface 42 and an image-side surface 44. The object side 42 of the third lens element 40 is concave; the image-side surface 44 is convex near the optical axis L and flat at the circumference. The diameter of the third lens 40 is equal to the diameter of the second lens 30.
The fourth lens element 50 is made of plastic and has an object-side surface 52 and an image-side surface 54. The object side surface 52 is concave; the image-side surface 54 is convex near the optical axis L and flat at the circumference. The diameter of the fourth lens 50 is larger than that of the third lens 40, and the projection of the peripheral wall of the third lens 40 on the object side surface 54 of the fourth lens 50 along the optical axis L is located on the concave surface of the fourth lens 50.
The fifth lens element 60 is made of plastic and has an object-side surface 62 and an image-side surface 64. The object side surface 62 is convex at a position close to the optical axis L, and the circumference is concave at first and then convex; the image-side surface 64 is concave near the optical axis L and convex at the circumference. The diameter of the fifth lens 60 is larger than that of the fourth lens 50, and a projection of the peripheral wall of the fourth lens 50 on the object side surface 62 of the fifth lens 60 along the optical axis L is located on a concave surface of the object side surface 62.
The sixth lens element 70 is made of plastic and has an object-side surface 72 and an image-side surface 74. The object side surface 72 is concave near the optical axis L, and the circumference is convex and then plane; the image-side surface 74 is concave near the optical axis L and convex at the circumference. The diameter of the sixth lens 70 is larger than that of the fifth lens 60, and a projection of the outer peripheral wall of the fifth lens 70 on the object side surface 72 of the sixth lens 70 along the optical axis L is located on a convex surface of the object side surface 72.
In the second embodiment, the design parameters of the first lens 20 to the sixth lens 70 of the optical lens system 100a are shown in tables 3 and 4 below.
In the second embodiment, the parameters of each aspherical surface of the optical lens system 100a are shown in table 4 below:
FOV in table 3 is a diagonal field angle of the optical lens system 100a, and FNO is an f-number of the optical lens system.
Table 4 shows aspheric data of the second embodiment, in which A4-A20 are aspheric coefficients of 4 th to 20 th order on each surface.
Based on the foregoing design, the system focal Length f Of the second embodiment Of the present application is 5.36mm, the system Length (TTL) is 5.95mm, the Field angle (FOV) at the maximum image height is 172.0 degrees, and the aperture value (f-number) is 1.88. As can be seen from fig. 6 to 8, the optical lens system 100a in the second embodiment of the present application is beneficial to ensure that a portion of light rays of the lens has a good effect, and at the same time, the system length of the optical lens system 100 is greatly reduced, so that the miniaturization of the optical lens system 100 can be satisfied, various aberrations can be effectively corrected, and the imaging quality is high.
Referring to fig. 9, fig. 9 is a schematic structural diagram of an image capturing apparatus 300 according to an embodiment of the present application. The present application further provides that the image capturing device 300 includes the optical lens system 100 of the present application and the photosensitive element 310. The light-sensing element 310 is located on the image side of the optical lens system 100.
In the present application, the photosensitive element 310 may be a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS) Sensor.
The image capturing device 300 can not only reduce the height of the lens, but also not reduce the final image quality of the image obtained by the image capturing device, thereby realizing the characteristic of an ultra-large wide angle and improving the imaging quality.
For the description of other features of the image capturing apparatus 300, reference is made to the above description, which is not repeated herein.
Referring to fig. 10, fig. 10 is a schematic structural diagram of an electronic device 500 according to an embodiment of the disclosure. The present application further provides an electronic device 500, which includes a device main body 510 and the image capturing device 300 of the present application. The image capturing device 300 is mounted on the apparatus main body 510.
The electronic device 500 of the present application includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a display, a vehicle-mounted image capturing device, a camera, a smart watch, a smart bracelet, smart glasses, an electronic book reader, a portable multimedia player, a mobile medical device, and the like.
The image capturing device 300 of the electronic device 500 of the present application has a small thickness, which is beneficial to reducing the volume of the electronic device 500.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (17)
1. An optical lens system, comprising, in order from an object side to an image side:
a first lens element with positive refractive power;
a second lens element with negative refractive power;
a third lens element with negative refractive power;
a fourth lens element with positive refractive power;
a fifth lens element with positive refractive power; and
a sixth lens element with negative refractive power;
wherein the optical lens system satisfies the following conditional expression:
l tan (hfov) |/TTL > 0.13; and 0.6< f1/f < 1.0; -4.0< f2/f < -1; f3/f < -1;
wherein HFOV is half of the horizontal field angle of the optical lens system, TTL is the length of the first lens from the object-side surface to the image plane on the optical axis, f is the effective focal length of the optical lens system, 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.
2. The optical lens system according to claim 1, wherein an object-side surface and an image-side surface of any one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are aspheric, and an aspheric formula of a surface type z of each aspheric lens is as follows:
wherein z is the rise of the distance from the vertex of the aspheric surface when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, wherein c is 1/R, and the paraxial curvature c is the reciprocal of the curvature radius R; k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface.
3. The optical lens system of claim 2 wherein the object side surface of the first lens is convex and the image side surface of the first lens is concave.
4. The optical lens system of claim 2 wherein the object side surface of the second lens is concave at the paraxial region; the image side surface of the second lens is a concave surface.
5. The optical lens system of claim 2, wherein the object side surface of the third lens is concave and the image side surface of the third lens is convex.
6. The optical lens system of claim 2, wherein the object side surface of the fourth lens element is concave and the image side surface of the fourth lens element is convex.
7. The optical lens system of claim 2 wherein the object-side surface of the fifth lens element is convex at the paraxial region; the image-side surface of the fifth lens element is concave at the paraxial region.
8. The optical lens system of claim 2 wherein the object side surface of the sixth lens element is concave at the paraxial region; the image-side surface of the sixth lens element is concave at the paraxial region.
9. The optical lens system of claim 1 further comprising an aperture stop disposed around an object side surface of the first lens.
10. An optical lens system according to claim 1, characterized in that the optical lens system satisfies the following conditional expression:
80°≤HFOV≤95°；
wherein the HFOV is half of a horizontal field angle of the optical lens system.
11. An optical lens system according to claim 1, characterized in that the optical lens system satisfies the following conditional expression:
5.7mm≤TTL≤6.1mm；
wherein, TTL is a length on the optical axis from the object side surface of the first lens element to the image plane.
12. An optical lens system according to claim 1, characterized in that the optical lens system satisfies the following conditional expression:
5.2mm≤f≤5.5mm；
wherein f is the focal length of the optical lens system.
13. An optical lens system according to claim 1, characterized in that the optical lens system satisfies the following conditional expression:
4.0mm≤f1≤6.0mm；
wherein f1 is the effective focal length of the first lens.
14. An optical lens system according to claim 1, characterized in that the optical lens system satisfies the following conditional expression:
-25.0mm≤f2≤-5.0mm；
wherein f2 is the effective focal length of the second lens.
15. An optical lens system according to claim 1, characterized in that the optical lens system satisfies the following conditional expression:
-100.0mm≤f3≤-40.0mm；
wherein f3 is the effective focal length of the third lens.
16. An image capturing apparatus, comprising:
the optical lens system of any one of claims 1-15; and
a photosensitive element located on an image side of the optical lens system.
17. An electronic device, comprising:
an apparatus main body; and
the image capturing device as claimed in claim 16, which is mounted on the apparatus main body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111284927.9A CN113866956B (en) | 2021-11-01 | 2021-11-01 | Optical lens system, image capturing device, and electronic apparatus |
| PCT/CN2022/114887 WO2023071480A1 (en) | 2021-11-01 | 2022-08-25 | Optical lens system, image capture device and electronic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111284927.9A CN113866956B (en) | 2021-11-01 | 2021-11-01 | Optical lens system, image capturing device, and electronic apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113866956A true CN113866956A (en) | 2021-12-31 |
| CN113866956B CN113866956B (en) | 2023-05-30 |
Family
ID=78986318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111284927.9A Active CN113866956B (en) | 2021-11-01 | 2021-11-01 | Optical lens system, image capturing device, and electronic apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113866956B (en) |
| WO (1) | WO2023071480A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023071480A1 (en) * | 2021-11-01 | 2023-05-04 | Oppo广东移动通信有限公司 | Optical lens system, image capture device and electronic apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025599A (en) * | 2019-12-31 | 2020-04-17 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN112462490A (en) * | 2019-09-06 | 2021-03-09 | 大立光电股份有限公司 | Photographing optical lens, image capturing device and electronic device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108415145B (en) * | 2018-04-26 | 2021-03-16 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
| JP6919027B1 (en) * | 2020-05-20 | 2021-08-11 | エーエーシー オプティックス ソリューションズ ピーティーイー リミテッド | Imaging optical lens |
| CN111427136B (en) * | 2020-06-09 | 2020-09-04 | 瑞声通讯科技(常州)有限公司 | Image pickup optical lens |
| CN111929872B (en) * | 2020-09-21 | 2021-01-05 | 常州市瑞泰光电有限公司 | Image pickup optical lens |
| CN113866956B (en) * | 2021-11-01 | 2023-05-30 | Oppo广东移动通信有限公司 | Optical lens system, image capturing device, and electronic apparatus |
-
2021
- 2021-11-01 CN CN202111284927.9A patent/CN113866956B/en active Active
-
2022
- 2022-08-25 WO PCT/CN2022/114887 patent/WO2023071480A1/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462490A (en) * | 2019-09-06 | 2021-03-09 | 大立光电股份有限公司 | Photographing optical lens, image capturing device and electronic device |
| CN111025599A (en) * | 2019-12-31 | 2020-04-17 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023071480A1 (en) * | 2021-11-01 | 2023-05-04 | Oppo广东移动通信有限公司 | Optical lens system, image capture device and electronic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113866956B (en) | 2023-05-30 |
| WO2023071480A1 (en) | 2023-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108072968B (en) | Image capturing optical lens system, image capturing device and electronic device | |
| CN111158122B (en) | Optical image lens system, image capturing device and electronic device | |
| TWI656375B (en) | Image lens system group, image capturing device and electronic device | |
| CN113741006A (en) | Optical lens, camera module and electronic equipment | |
| CN111965789A (en) | Optical lens, imaging device and terminal | |
| CN111239971A (en) | Optical system, camera module and electronic device | |
| CN111638584A (en) | Optical assembly, camera module and mobile terminal | |
| CN211786312U (en) | Optical system, camera module and electronic device | |
| CN112154363B (en) | Optical imaging system and electronic device | |
| CN114167583A (en) | Optical lens, camera module and electronic equipment | |
| CN211554452U (en) | Optical system, camera module and electronic device | |
| CN211263926U (en) | Optical system, camera module and electronic device | |
| CN113866956B (en) | Optical lens system, image capturing device, and electronic apparatus | |
| CN113325550B (en) | Optical lens system, image capturing device and electronic equipment | |
| CN115576081A (en) | Optical lens system, image capturing device and electronic equipment | |
| CN112835174A (en) | Optical imaging system, image capturing device and electronic equipment | |
| CN113325551A (en) | Optical lens system, image capturing device and electronic equipment | |
| CN113866940B (en) | Optical system, camera module and electronic equipment | |
| CN211554455U (en) | Optical imaging system, image capturing device and electronic equipment | |
| CN212989754U (en) | Optical lens, camera module and electronic equipment | |
| CN211528803U (en) | Optical system, camera module and electronic device | |
| CN111239987A (en) | Optical imaging system, image capturing device and electronic equipment | |
| CN114002832A (en) | Optical system, lens module and electronic equipment | |
| CN113514937A (en) | Optical system, camera module and electronic equipment | |
| CN113075785A (en) | Optical system, camera module and electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |