CN115576081A

CN115576081A - Optical lens system, image capturing device and electronic equipment

Info

Publication number: CN115576081A
Application number: CN202211259665.5A
Authority: CN
Inventors: 马力
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-01-06
Also published as: WO2024078202A1

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: the lens comprises a prism with total reflection, a first lens with positive refractive power and a second lens with negative refractive power; a third lens element with positive refractive power, a fourth lens element with positive refractive power, and a fifth lens element with negative refractive power; the object side surface and the image side surface of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are aspheric surfaces, and the optical lens system meets the following conditional expressions: TTL/EFL <1.05; wherein, TTL is the total optical length of the optical lens system, and EFL is the effective focal length of the optical lens system. The utility model provides an optical lens system forms periscopic telephoto lens, can satisfy the demand of shooing of big image plane telephoto lens, and has better imaging effect when guaranteeing miniaturization and ultra-thin, has promoted the imaging quality.

Description

Optical lens system, image capturing device and electronic equipment

Technical Field

The present disclosure relates to optical lens systems, 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 long-focus lens of the camera lens module lens of the existing mobile phone or mobile terminal has a small image plane, is poor in long-distance shooting imaging experience of a user, and cannot meet the requirement of miniaturization of equipment.

Disclosure of Invention

In view of the above, the present application provides an optical lens system, comprising, in order from an object side to an image side:

a prism having total reflection;

a first lens element with positive refractive power;

a second lens element with negative refractive power;

a third lens element with positive refractive power;

a fourth lens element with positive refractive power; and

a fifth lens element with negative refractive power;

wherein object-side surfaces and image-side surfaces of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element are aspheric, and the optical lens system satisfies the following conditional expressions:

TTL/EFL <1.05; wherein, TTL is the total optical length of the optical lens system, and EFL is the effective focal length of the optical lens system.

The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the right-angle prism of the optical lens system are matched to convert the light path so as to realize the function of periscopic imaging, so that the optical lens system forms a periscopic telephoto lens, and the photographing requirement of the telephoto lens with a large image surface can be met under the condition that the imaging quality requirement is not reduced; due to the fact that TTL/EFL in the optical lens system is less than 1.05, the optical total length of the optical lens system is reduced, the optical lens system has a good imaging effect while ensuring miniaturization and ultra-thinning, the characteristic of an ultra-large wide angle is achieved, and imaging quality is improved.

In some embodiments, the prism is a right-angle prism, an exit surface of the right-angle prism faces an object side surface of the first lens, and an optical axis of the optical lens system is perpendicular to the exit surface.

In some embodiments, the exit surface and/or the entrance surface of the right angle prism is provided as a diffractive aspheric surface.

In some embodiments, an object-side surface or an image-side surface of at least one of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is set to be a diffraction surface.

In some embodiments, the optical lens system has an aperture value of 2.4.

In some embodiments, the optical lens system satisfies the following conditional expression:

32°≤FOV≤38°；

wherein the FOV is a horizontal field angle of the optical lens system.

BFL>5.4mm；

wherein BFL is the back focal length of the optical lens system.

r1/r2>-0.15；

wherein r1 is a radius of an object side surface of the first lens element, and r2 is a radius of an image side surface of the first lens element.

d1/d2<2.95；

wherein d1 is the thickness of the first lens element at the paraxial region thereof, and d2 is the thickness interval between the first and second lens elements.

D<2.95mm；

wherein D is the optical effective aperture of the fifth lens.

In some embodiments, a length from an object-side surface of the first lens of the optical lens system to an image-side surface of the fifth lens in the optical axis direction is less than 10mm.

In some embodiments, the exit surface or the incident surface of the right-angle prism adopts a diffraction surface of an aspheric substrate, and the central wavelength of diffraction is 555nm.

In some embodiments, the object side surface of the first lens adopts a diffraction surface of an aspheric substrate, and the diffraction center wavelength is 555nm.

In some embodiments, the equation for the aspheric surface is:

wherein z is the rise of the curved surface; r is a radial coordinate; a is ₁ --a ₇ Are respectively even term r ² --r ¹⁴ The coefficient of (a); k is a conic coefficient; c is the curvature.

The phase function equation for the diffraction surface is:

wherein A is ₁ 、A ₂ And A ₃ Respectively, the coefficients of the different terms, r being the radial coordinate.

In some embodiments, the object-side surface of the first lens is convex, the image-side surface of the first lens is concave, the radius of curvature of the object-side surface of the first lens ranges from 7.6mm to 8.5mm, and the radius of curvature of the image-side surface of the first lens ranges from-80 mm to-90 mm.

In some embodiments, the object-side surface of the second lens is convex and the image-side surface of the second lens is concave; the curvature radius range of the object side surface of the second lens is 6.5 mm-8 mm, and the curvature radius range of the image side surface of the second lens is 3.7 mm-4.2 mm.

In some embodiments, an object-side surface of the third lens element is convex, an image-side surface of the third lens element is convex, a radius of curvature of the object-side surface of the third lens element ranges from 24.5mm to 25.5mm, and a radius of curvature of the image-side surface of the third lens element ranges from-10 mm to-10.5 mm.

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; the curvature radius range of the object side surface of the fourth lens is 55 mm-105 mm, and the curvature radius range of the image side surface of the fourth lens is-30 mm-55 mm.

In some embodiments, an object-side surface of the fifth lens element is concave at a paraxial region, an image-side surface of the second lens element is concave at a paraxial region, a radius of curvature of the object-side surface of the fifth lens element ranges from 20mm to 45mm, and a radius of curvature of the image-side surface of the fifth lens element ranges from 4.5mm to 5.5mm.

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 can meet the photographing requirement of the telephoto lens with a large image surface under the condition of not reducing the imaging quality requirement; and the thickness of the image capturing device is small, so that the image capturing device can be used for preparing an ultrathin image capturing device, and the image capturing device has a wider angle of view and imaging quality while ensuring miniaturization.

The embodiment of the present application further provides an electronic device, which includes a housing and the image capturing device, wherein the image capturing device is installed on the housing.

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 graph of F-Tan (Theta) distortion of 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 chromatic aberration of magnification plot for the optical lens system of FIG. 1;

FIG. 5 is a longitudinal spherical difference plot for the optical lens system of FIG. 1;

FIG. 6 is a schematic structural view of an optical lens system according to a second embodiment of the present application;

FIG. 7 is a graph of F-Tan (Theta) distortion of the optical lens system of FIG. 6;

FIG. 8 is a chromatic aberration of magnification graph of the optical lens system of FIG. 6;

FIG. 9 is a longitudinal spherical difference plot for the optical lens system of FIG. 6;

FIG. 10 is a schematic structural diagram of an optical lens system according to a third embodiment of the present application;

FIG. 11 is a graph of F-Tan (Theta) distortion of the optical lens system of FIG. 10;

FIG. 12 is a chromatic aberration of magnification graph of the optical lens system of FIG. 10;

FIG. 13 is a longitudinal spherical difference plot for the optical lens system of FIG. 10;

FIG. 14 is a schematic view of an optical lens system according to a fourth embodiment of the present application;

FIG. 15 is a field curvature graph of the optical lens system of FIG. 14;

FIG. 16 is a graph of F-Tan (Theta) distortion of the optical lens system of FIG. 14;

FIG. 17 is a longitudinal spherical difference plot for the optical lens system of FIG. 14;

FIG. 18 is a chromatic aberration of magnification graph of the optical lens system in FIG. 14;

FIG. 19 is a schematic structural diagram of an optical lens system according to a fifth embodiment of the present application;

FIG. 20 is a graph of F-Tan (Theta) distortion for the optical lens system of FIG. 19;

FIG. 21 is a plot of longitudinal spherical difference values for the optical lens system of FIG. 20;

FIG. 22 is a graph of chromatic aberration of magnification of the optical lens system in FIG. 20;

FIG. 23 is a schematic structural view of an optical lens system according to a sixth embodiment of the present application;

FIG. 24 is a graph of F-Tan (Theta) distortion of the optical lens system of FIG. 23;

FIG. 25 is a longitudinal spherical difference plot for the optical lens system of FIG. 23;

FIG. 26 is a graph of chromatic aberration of magnification of the optical lens system in FIG. 23;

FIG. 27 is a schematic structural view of an optical lens system according to a seventh embodiment of the present application;

FIG. 28 is a graph of F-Tan (Theta) distortion of the optical lens system of FIG. 27;

FIG. 29 is a longitudinal spherical difference plot of the optical lens system of FIG. 27;

FIG. 30 is a chromatic aberration of magnification plot for the optical lens system of FIG. 27;

FIG. 31 is a schematic structural view of an optical lens system according to an eighth embodiment of the present application;

FIG. 32 is a graph of F-Tan (Theta) distortion of the optical lens system of FIG. 31;

FIG. 33 is a longitudinal spherical difference plot for the optical lens system of FIG. 31;

FIG. 34 is a chromatic aberration of magnification graph of the optical lens system in FIG. 31;

FIG. 35 is a schematic view of an optical lens system according to a ninth embodiment of the present application;

FIG. 36 is a graph of F-Tan (Theta) distortion for the optical lens system of FIG. 35;

FIG. 37 is a longitudinal spherical difference plot for the optical lens system of FIG. 35;

FIG. 38 is a chromatic aberration of magnification plot for the optical lens system of FIG. 35;

fig. 39 is a schematic structural diagram of an image capturing apparatus according to an embodiment of the present application;

fig. 40 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", "second" and "first" appearing in the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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, the meaning of "a plurality" refers to two or more, unless specifically defined otherwise.

Referring to fig. 1, an optical lens system 100 according to an embodiment of the present disclosure is suitable for a telephoto 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, and a robot. The optical lens system 100 includes, in order from an object side to an image side, a prism with total reflection, a first lens element 20 with positive refractive power, a second lens element 30 with negative refractive power, a third lens element 40 with positive refractive power, a fourth lens element 50 with positive refractive power, and a fifth lens element 60 with negative refractive power; the object-side surface and the image-side surface of the first lens element 20, the second lens element 30, the third lens element 40, the fourth lens element 50, and the fifth lens element 60 are aspheric, that is, the object-side surface and the image-side surface of all the lenses in the optical lens system 100 are aspheric, and the optical lens system 100 satisfies the following conditional expression:

TTL/EFL<1.05；

wherein, TTL is the total optical length of the optical lens system, and EFL is the effective focal length of the optical lens system.

The first lens 20 to the fifth lens 60 of the optical lens system 100 of the present application cooperate with the prism to fold the light path to realize the periscopic imaging function, so that the optical lens system 100 forms a periscopic telephoto lens, and the photographing requirement of the telephoto lens with a large image plane can be met without reducing the imaging quality requirement; because TTL/EFL in optical lens system 100 is <1.05, the optical total length of optical lens system has been reduced to make the optical lens system 100 of this application have better imaging effect when guaranteeing miniaturization and ultra-thinning, realize the characteristic of super large wide angle, promoted the imaging quality.

In the optical lens system 100 of the present application, the prism is a right-angle prism 10 with total reflection, the right-angle prism 10 may be, but is not limited to, a transparent material such as glass or plastic, and the refractive index of the right-angle prism 10 meets the requirement of total reflection; further, the right angle prism 10 may be selected from, but not limited to, H-ZE13GT or other higher index material. Specifically, the right-angle prism 10 includes an exit surface 102 and an incident surface 101 that are perpendicular to each other, and a bottom surface 104 connected between the exit surface 102 and the incident surface 101, that is, a vertex angle θ between the exit surface 102 and the incident surface 101 is 90 degrees, the exit surface 102 of the right-angle prism 10 faces the object-side surface of the first lens 20, and the incident surface 101 of the right-angle prism 10 is parallel to the optical axis L of the optical lens system 100. That is, the optical axis L of the optical lens system 100 is perpendicular to the exit surface 102, and the optical axis L is parallel to the incident surface 101 of the rectangular prism 10. The light enters the rectangular prism 10 from the incident surface 101 of the rectangular prism 10, is reflected by the bottom surface 104, and then exits from the exit surface 102 of the rectangular prism 10 to enter the first lens 20.

In the optical lens system 100 of the present application, the first lens element 20 may be made of glass or plastic, in this embodiment, the first lens element 20 is made of plastic with a high abbe number, the first lens element 20 is meniscus-shaped toward the image side, specifically, the first lens element 20 has an object-side surface 22 and an image-side surface 24, both the object-side surface 22 and the image-side surface 24 are aspheric, and the first lens element 20 has positive refractive power. The object-side surface 22 of the first lens element 20 is a convex surface, the image-side surface 24 of the first lens element 20 is a concave surface, and the image-side surface 24 is a concave surface, so that the light reflected by the object can be effectively captured by the optical lens system, and the convergence of the light in the field of view outside the optical axis L can be enhanced to enter the image plane of the optical lens system. The curvature radius range of the object side surface 22 of the first lens 20 is 7.6 mm-8.5 mm, and the curvature radius range of the image side surface 24 of the first lens 20 is-80 mm-90 mm; preferably, the radius of curvature of the object side 22 is 7.83mm and the radius of curvature of the image side 24 is-87.05 mm. The thickness of the object side surface 22 and the thickness of the image side surface 24 of the first lens 20 are both 1.1mm-1.25mm, and preferably, the thickness of the object side surface 22 and the thickness of the image side surface 24 of the first lens 20 are both 1.22mm. The refractive index of the first lens 20 ranges from 1.5 to 1.58, and preferably, the refractive index of the first lens 20 is 1.546. The first lens 20 has an abbe number in the range of 50-55.814, and preferably the first lens 20 has an abbe number of 55.814. The focal length of the first lens 20 is in the range of 13-13.8, preferably the focal length of the first lens 20 is 13.22. In some embodiments, the object-side surface 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 100 of the present application, the second lens element 30 may be made of glass or plastic, in this embodiment, the second lens element 30 is made of a plastic material with a high refractive index, and the second lens element 30 is in a meniscus shape facing an image plane; specifically, the second lens element 30 has an object-side surface 32 and an image-side surface 34, both of the object-side surface 32 and the image-side surface 34 are aspheric, and the second lens element 30 has negative refractive power. The object-side surface 32 of the second lens element 30 is convex and the image-side surface 34 of the second lens element 30 is concave. The curvature radius range of the object side surface 32 of the second lens 30 is 6.5 mm-8 mm, and the curvature radius range of the image side surface 34 of the second lens 30 is 3.7 mm-4.2 mm; preferably, the radius of curvature of object side 32 is 7.88mm and the radius of curvature of image side 34 is 4.1mm. The thickness of the object-side surface 32 and the thickness of the image-side surface 34 of the second lens 30 are both in the range of 0.75mm-0.85mm, and preferably, the thickness of the object-side surface 32 and the thickness of the image-side surface 34 of the second lens 30 are both 0.824mm. The refractive index of the second lens 30 ranges from 1.6 to 1.67, and preferably, the refractive index of the second lens 30 is 1.67. The second lens 30 has an abbe number in the range of 19.39-35, and preferably the second lens 30 has an abbe number of 19.39. The focal length of the second lens 30 ranges from-15 to-13.5, and preferably, the focal length of the second lens 30 is-13.865. In some embodiments, the object-side surface 32 of the second lens element 30 is convex near the optical axis L and is flat at the peripheral edge; the image-side surface 34 of the second lens element 30 is concave at a paraxial region and is flat at a peripheral region. In some embodiments, 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 onto 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 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 100 of the present application, the third lens 40 may be made of glass or plastic, in this embodiment, the third lens 40 is made of a high abbe number material, and the third lens 40 is in a biconvex shape protruding toward both the image plane and the object plane; specifically, the third lens element 40 has an object-side surface 42 and an image-side surface 44, both the object-side surface 42 and the image-side surface 44 are aspheric, and the third lens element 40 has positive refractive power. The object-side surface 42 of the third lens element 40 is convex, and the image-side surface 34 of the second lens element 30 is convex at the paraxial region L. The curvature radius range of the object side surface 42 of the third lens 40 is 24.5 mm-25.5 mm, and the curvature radius range of the image side surface 44 of the third lens 40 is-10 mm-10.5 mm; preferably, the radius of curvature of object-side surface 42 is 25.269mm and the radius of curvature of image-side surface 44 is-10.21 mm. The thickness of the object-side surface 42 and the thickness of the image-side surface 44 of the third lens 40 both range from 1.3mm to 1.7mm, and preferably, the thickness of the object-side surface 42 and the thickness of the image-side surface 44 of the third lens 40 both range from 1.327mm. The refractive index of the third lens 40 ranges from 1.5 to 1.58, and preferably, the refractive index of the third lens 40 is 1.546. The third lens 40 has an abbe number in the range of 50-55.814, and preferably the third lens 40 has an abbe number of 55.814. The focal length of the third lens 40 ranges from 13.2 to 13.7, and preferably, the focal length of the third lens 40 is 13.495. In some embodiments, the object-side surface 42 of the third lens element 40 is convex, and the image-side surface 44 of the third lens element 40 is convex at a paraxial region and concave at a peripheral region. In some embodiments, the diameter of the third lens 40 is smaller than the diameter of the second lens 30, and a projection of the outer peripheral wall of the third lens 30 onto the image-side surface 34 of the second lens 30 along the optical axis L is located on a concave surface of the image-side surface 34. In some embodiments, the diameter of the third lens 40 may also be equal to the diameter of the second lens 30.

In the optical lens system 100 of the present application, the fourth lens element 50 may be made of glass or plastic, in this embodiment, the third lens element 40 is made of a high refractive index material, and the fourth lens element 50 is in a meniscus shape facing the object plane; specifically, the fourth lens element 50 has an object-side surface 52 and an image-side surface 54, both the object-side surface 52 and the image-side surface 54 are aspheric, and the fourth lens element 50 has 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 curvature radius range of the object side surface 52 of the fourth lens 50 is 55 mm-105 mm, and the curvature radius range of the image side surface 54 of the fourth lens 50 is-30 mm-55 mm; preferably, the radius of curvature of the object side surface 52 is 100.27mm and the radius of curvature of the image side surface 54 is-34.45 mm. The thickness of the object-side surface 52 and the thickness of the image-side surface 54 of the fourth lens 50 are both 1.35mm to 1.6mm, and preferably, the thickness of the object-side surface 52 and the thickness of the image-side surface 54 of the fourth lens 50 are both 1.385mm. The refractive index of the fourth lens 50 ranges from 1.6 to 1.67, and preferably, the refractive index of the fourth lens 50 is 1.67. The fourth lens 50 has an abbe number in the range of 19.39-35, and preferably the fourth lens 50 has an abbe number of 19.39. The focal length of the fourth lens 50 ranges from 36 to 43, and preferably, the focal length of the fourth lens 50 is 38.08. In some embodiments, the object side surface 52 of the fourth lens element 50 is concave, the image side surface 54 of the fourth lens element 50 is convex proximate the optical axis, and is flat at the periphery. In some embodiments, the diameter of the fourth lens 50 is smaller than the diameter of the third lens 40. In some embodiments, the diameter of the fourth lens 50 may also be equal to the diameter of the third lens 40.

In the optical lens system 100 of the present application, the fifth lens element 60 may be made of glass or plastic, in this embodiment, the fifth lens element 60 is made of a high abbe number material, and the fifth lens element 60 is in a meniscus shape facing the object plane; specifically, the fifth lens element 60 has an object-side surface 62 and an image-side surface 64, both the object-side surface 62 and the image-side surface 64 are aspheric, and the fifth lens element 60 has negative refractive power. The object-side surface 62 of the fifth lens element 60 is concave at the paraxial region L; the image-side surface 64 of the fifth lens element 60 is concave at the paraxial region L. The curvature radius range of the object side surface 62 of the fifth lens 60 is 20mm-45mm, and the curvature radius range of the image side surface 64 of the fifth lens 60 is 4.5 mm-5.5 mm; preferably, the radius of curvature of object side surface 62 is 22.59mm and the radius of curvature of image side surface 64 is 4.94mm. The thickness of the object-side surface 62 and the thickness of the image-side surface 64 of the fifth lens 60 are both in the range of 0.68mm to 0.82mm, and preferably, the thickness of the object-side surface 62 and the thickness of the image-side surface 64 of the fifth lens 60 are both 0.807mm. The refractive index of the fifth lens 60 ranges from 1.5 to 1.58, and preferably, the refractive index of the fifth lens 60 is 1.546. The fifth lens 60 has an abbe number in the range of 50-55.814, and preferably, the fifth lens 60 has an abbe number of 55.814. The focal length of the fifth lens 60 ranges from-11.8 to-11.2, and preferably, the focal length of the fifth lens 60 is-11.78. In some embodiments, the object side surface 62 of the fifth lens element 60 is concave at the paraxial region L and is flat at the circumference; the image-side surface 64 of the fifth lens element 60 is concave at a paraxial region, convex at a circumference, and flat at a circumference. In some embodiments, the diameter of the fifth lens 60 is greater than the diameter of the fourth lens 50. In some embodiments, the diameter of the fifth lens 60 may also be equal to the diameter of the fourth lens 50.

In the present application, the first lens element 20, the second lens element 30, the third lens element 40, the fourth lens element 50 and the fifth lens element 60 are designed in a matched manner to optimize the aberration of the optical lens system 100, so that the aberration of the optical lens system 100 is optimized to be minimum, thereby improving the imaging quality of the optical lens system 100; and the total system length of the optical lens system 100 is shortened to meet the trend of miniaturization of the optical lens system 100.

In some embodiments, the right angle prism 10 is a glass lens; the first lens 20, the second lens 30, the third lens 40, the fourth lens 50, and the fifth lens 60 are all plastic lenses. Since the right-angle prism 10 is a glass lens, it can better withstand the influence of the ambient temperature on the object side, and meanwhile, the first lens 20, the second lens 30, the third lens 40, the fourth lens 50, and the fifth lens 60 are plastic lenses, which can reduce the weight of the optical lens system 100 and the production cost. 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, and the fifth lens 60 are 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.

In the present embodiment, the optical lens system 100 further includes an aperture stop 80, and specifically, the aperture stop 80 is disposed around the object-side surface 22 of the first lens 20. Preferably, the aperture value of the optical lens system 100 is 2.4. The thickness range of the diaphragm 80 is: -0.5mm to-0.8 mm.

Preferably, the focal length of the optical lens system ranges from 14mm to 16mm, and the equivalent full-frame focal length of the optical lens system ranges from 60mm to 67.5mm, so that a 2.5-fold magnification function can be realized.

In the optical lens system 100 of the present application, preferably, the optical lens system 100 further includes an infrared cut filter 90. The infrared cut filter 90 is located between the fifth lens 60 and the image plane 105. 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 image distortion, and enable the formed image to better conform to the feeling of human eyes.

In the 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. Preferably, the sensor is 1/1.56 "inch and the half image height (IMGH) is 5.12.

32°≤FOV≤38°；

wherein the FOV is a horizontal field angle of the optical lens system. Specifically, the FOV of the optical lens system of the present application may be, but is not limited to, 36.3 °, 36.4 °, 36.46 °, 35.01 °, 35.53 °, 35.72 °, 32.43 °, 32.47 °, 32.9 °, etc.; more specifically, the optical lens system described herein satisfies: the FOV is more than or equal to 32 degrees and less than or equal to 38 degrees, namely the HFOV is more than or equal to 32 degrees and less than or equal to 38 degrees.

BFL>5.4mm；

wherein BFL is the back focal length of the optical lens system. I.e. the back focal length of the optical lens system 100 needs to be larger than 5.4mm.

r1/r2>-0.15；

where r1 is the radius of the object-side surface 22 of the first lens element 20, and r2 is the radius of the image-side surface 24 of the first lens element 20.

d1/d2<2.95；

wherein d1 is a thickness at a paraxial region of the first lens 20, and d2 is an axial center thickness of a thickness interval between the first lens 20 and the second lens 30; further, d1 is the thickness of the first lens 20 in the axial direction of the first lens 20 thereof near the optical axis (i.e., at the center).

D<2.95mm；

where D is the optical effective aperture of the fifth lens 60. That is, D may be, but is not limited to, 2.90mm, 2.92mm, 2.85mm, and the like.

In some embodiments, the optical lens system satisfies the following condition: the length from the object-side surface 22 of the first lens 20 of the optical lens system to the image-side surface 64 of the fifth lens 60 in the optical axis direction is less than 10mm. That is, the length from the object side surface 22 of the first lens 20 to the image side surface 64 of the fifth lens 60 along the optical axis direction of the optical lens system may be, but is not limited to, 9.5mm, 9.6mm, 9.8mm, etc., so that the overall length of the optical lens system is short, which is beneficial to the trend of miniaturization of the lens.

The right-angle prism 10 provides efficient internal total reflection incident light to a lens group of the optical lens system, the first lens element 20 provides positive refractive power, the second lens element 30 provides negative refractive power, the third lens element 40 provides positive refractive power, the fourth lens element 50 provides positive refractive power and the fifth lens element 60 provides negative refractive power, the focal powers of the first lens element 20 to the fifth lens element 60 are reasonably configured, and a clear image is obtained by combining an image processing algorithm at the rear end of the optical lens system, so that the optical lens system has high imaging quality.

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 5, the optical lens system 100 of the present embodiment includes, in order from an object side to an image side, a right-angle prism 10 with total reflection, an aperture 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 positive refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with negative refractive power, an ir-cut filter 90 and an image plane 105.

The aperture stop 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 2.4.

The first lens element 20 is made of a plastic material with a high abbe number, and has an object-side surface 22 and an image-side surface 24. The object side surface 22 is a convex surface near the optical axis L, the circumference is a plane, and the aperture 80 is arranged on the plane; the image-side surface 24 of the first lens element 20 is concave.

The second lens element 30 is made of a plastic material with a high refractive index, and has an object-side surface 32 and an image-side surface 34. The object-side surface 32 is convex near the optical axis L, and may be flat at the circumference; the image side 34 is concave. The diameter of the second lens 30 is equal to the straight of the first lens 20.

The third lens element 40 is made of a plastic material with a high abbe number, 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 convex, the image-side surface 34 of the second lens element 30 is convex at a paraxial region L, and is flat at a periphery thereof; the diameter of the third lens 40 is smaller than the diameter of the second lens 30, and the projection of the outer peripheral wall of the third lens 40 on the image side surface 34 of the second lens 30 along the optical axis L is located on the concave surface.

The fourth lens element 50 is made of a high refractive index plastic material 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 flat at the circumference. The diameter of the fourth lens 50 is smaller than the diameter of the third lens 40, and a projection of the outer peripheral wall of the fourth lens 50 on the image side surface 44 of the third lens 40 along the optical axis L is located in the plane of the third lens 40.

The fifth lens element 60 is made of a plastic material with a high abbe number, and has an object-side surface 62 and an image-side surface 64. The object side surface 62 is concave near the optical axis L, and the circumference is a plane; the image-side surface 64 is concave near the optical axis L, and convex and concave at the circumference. The diameter of the fifth lens 60 is larger than the diameter 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 in the plane of the object side surface 62.

In the first embodiment, the design parameters of the first lens 20 to the fifth lens 60 of the optical lens system 100 are shown in tables 1 and 2 below.

In table 1, FOV is a field angle of the optical lens system 100 in a diagonal direction, FNO is an f-number of the optical lens system, f is a system focal length of the optical lens system 100, and TTL is a system length of the optical lens system 100.

In the first embodiment, the parameters of each aspheric surface of the optical lens system 100 are shown in the following table 2:

table 2 shows aspheric data of the first embodiment, in which A4 to a20 are aspheric coefficients of 4 th to 20 th order of each surface.

Based on the aforementioned design, the system focal length f of the first embodiment of the present application is 15.233mm, the system length (TTL) is 15.58mm, the Field of view (FOV) at the maximum image height is 36.3 degrees, and the aperture value (f-number) is 2.4.

As can be seen from fig. 1 to fig. 5, the optical lens system 100 in the first embodiment of the present application is beneficial to ensure that the light of the lens has a better imaging effect, and at the same time, the aperture value is effectively increased, and 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 higher.

Second embodiment

Referring to fig. 6 to 9, the optical lens system 100a of the present embodiment includes, in order from an object side to an image side, a right-angle prism 10 with total reflection, an aperture 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 positive refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with negative refractive power, an ir-cut filter 90 and an image plane 105.

The right-angle prism 10 is made of transparent glass, the right-angle prism 10 has total reflection, an exit surface 102 of the right-angle prism 10 faces the object-side surface 22 of the first lens 20, and the optical axis L is perpendicular to the exit surface 102.

The first lens element 20 is made of a plastic material with a high abbe number, and has an object-side surface 22 and an image-side surface 24. The object side surface 22 is convex near the optical axis L, the circumference is a plane, and the aperture 80 is arranged on the plane; the image side surface 24 of the first lens element 20 is concave.

The second lens element 30 is made of high refractive index glass material and has an object-side surface 32 and an image-side surface 34. The object-side surface 32 is convex near the optical axis L, and may be flat at the circumference; the image side 34 is concave. The diameter of the second lens 30 is equal to the straight length of the first lens 20.

The third lens element 40 is made of a plastic material with a high abbe number, 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 convex, the image-side surface 34 of the second lens element 30 is convex at the paraxial region L, and is substantially planar at the periphery; the diameter of the third lens 40 is smaller than the diameter of the second lens 30, and the projection of the outer peripheral wall of the third lens 40 on the image side surface 34 of the second lens 30 along the optical axis L is located on the concave surface.

The fifth lens element 60 is made of a plastic material with a high abbe number, and has an object-side surface 62 and an image-side surface 64. The object side surface 62 is concave at a position close to the optical axis L, and the circumference is a plane; the image-side surface 64 is concave near the optical axis L, and convex and concave at the circumference. The diameter of the fifth lens 60 is larger than the diameter 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 in the plane of the object side surface 62.

In the second embodiment, the design parameters of the first lens 20 to the fifth lens 60 of the optical lens system 100a are shown in tables 3 and 4 below.

In table 3, FOV is a diagonal field angle of the optical lens system 100a, FNO is an f-number of the optical lens system 100a, f is a system focal length of the optical lens system 100a, and TTL is a system length of the optical lens system 100 a.

In the second embodiment, the parameters of the aspherical surfaces of the optical lens system 100a are shown in the following table 4:

table 4 shows aspheric data of the second embodiment, in which A4 to a20 are aspheric coefficients of 4 th to 20 th order of each surface.

Based on the aforementioned design, the system focal length f of the second embodiment of the present application is 15.129mm, the system length (TTL) is 15.58mm, the Field angle (FOV) at the maximum image height is 36.4 degrees, and the aperture value (f-number) reaches 2.4.

As can be seen from fig. 6 to 9, the optical lens system 100a in the second embodiment of the present application is beneficial to ensure that the light of the lens has a better imaging effect, and at the same time, the aperture value is effectively increased, and the system length of the optical lens system 100a is greatly reduced, so that the miniaturization of the optical lens system 100a can be satisfied, various aberrations can be effectively corrected, and the imaging quality is higher.

Third embodiment

Referring to fig. 10 to 13, the optical lens system 100b of the present embodiment includes, in order from an object side to an image side, a right-angle prism 10 with total reflection, an aperture 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 positive refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with negative refractive power, an ir-cut filter 90 and an image plane 105.

The first lens element 20 is made of a glass material having a high Abbe number, and has an object-side surface 22 and an image-side surface 24. The object side surface 22 is a convex surface near the optical axis L, the circumference is a plane, and the aperture 80 is arranged on the plane; the image-side surface 24 of the first lens element 20 is concave.

The second lens element 30 is made of a plastic material with a high refractive index, and has an object-side surface 32 and an image-side surface 34. The object side surface 32 is convex near the optical axis L, and the circumference may be a plane; the image side 34 is concave. The diameter of the second lens 30 is equal to the diameter of the first lens 20.

The fifth lens element 60 is made of a plastic material with a high abbe number, and has an object-side surface 62 and an image-side surface 64. The object side surface 62 is concave at a position close to the optical axis L, and the circumference is a plane; the image-side surface 64 is concave near the optical axis L, convex and concave at the circumference. The diameter of the fifth lens 60 is larger than the diameter 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 in the plane of the object side surface 62.

In the third embodiment, the design parameters of the first lens 20 to the fifth lens 60 of the optical lens system 100b are shown in tables 5 and 6 below.

In table 5, FOV is the field angle of the optical lens system 100b in the diagonal direction, FNO is the f-number of the optical lens system 100b, f is the system focal length of the optical lens system 100b, and TTL is the system length of the optical lens system 100 b.

In the third embodiment, the parameters of each aspherical surface of the optical lens system 100b are shown in table 6 below:

table 6 shows aspheric data of the third embodiment, in which A4 to a20 are aspheric coefficients of 4 th to 20 th order of each surface.

Based on the aforementioned design, the system focal length f Of the third embodiment Of the present application is 15.12mm, the system length (TTL) is 15.58mm, the Field Of View (FOV) at the maximum image height is 36.46 degrees, and the aperture value (f-number) is 2.4.

As can be seen from fig. 10 to 13, the optical lens system 100b in the third embodiment of the present application is beneficial to ensure that the light of the lens has a better imaging effect, and at the same time, the aperture value is effectively increased, and the system length of the optical lens system 100b is greatly reduced, so that the miniaturization of the optical lens system 100b can be satisfied, various aberrations can be effectively corrected, and the imaging quality is higher.

In other embodiments, the optical lens system may also include more than 5 lenses as desired.

In other embodiments, a transparent lens is disposed on the object side of the right-angle prism of the optical lens system to protect the optical lens system.

Fourth embodiment

Referring to fig. 14 to 17, an exit surface 102 of the right-angle prism 10a facing the first lens element 20 of the optical lens system 100c of the present embodiment is a diffractive aspheric surface 103, that is, an exit surface of the right-angle prism 10a is a diffractive aspheric surface 103. The right-angle prism 10a is designed by adopting a diffraction surface of an aspheric surface substrate, and the diffraction center wavelength is 555nm; wherein the aspheric equation is:

wherein z is the rise of the curved surface; r is a radial coordinate; a is a ₁ --a ₇ Are respectively even term r ² --r ¹⁴ The coefficient of (a); k is a conic coefficient; c is the curvature.

The phase function equation for the diffraction surface is:

Diffraction surface coefficient:

diffraction order: 1;

structural wavelength: 555nm;

A1	-0.000499635799275957
		A2	8.85001715852036e-06
A3	-9.55041858618262e-07

in this embodiment, the optical lens system 100c includes, in order from an object side to an image side, a right-angle prism 10a with an aspheric diffraction light-emitting surface, a first lens element 20 with positive refractive power, an aperture stop 80, a second lens element 30 with negative refractive power, a third lens element 40 with positive refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with negative refractive power, an ir-cut filter 90 and an image plane 105.

The rectangular prism 10a is made of transparent glass, and the exit surface of the rectangular prism 10a is a diffractive aspheric surface.

The first lens element 20 is made of a plastic material with a high Abbe number, and has an object-side surface 22 and an image-side surface 24. The object-side surface 22 is convex at a position near the optical axis L, and is flat at a circumference, and the image-side surface 24 is concave at a position near the optical axis L, and is flat at a circumference.

The aperture stop 80 is disposed around the image side surface 24 of the first lens element 20, and the aperture value of the optical lens system 100 is 2.4.

The second lens element 30 is made of a plastic material with a high refractive index, and has an object-side surface 32 and an image-side surface 34. The object-side surface 32 is convex near the optical axis L, and may be flat at the circumference; the image side surface 34 is concave near the optical axis L and flat at the circumference. The diameter of the second lens 30 is smaller than the diameter of the first lens 20.

The third lens element 40 is made of a plastic material with a high abbe number, 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 convex, the image-side surface 34 of the second lens element 30 is convex at a paraxial region L, and is flat at a periphery thereof; the diameter of the third lens 40 is smaller than the diameter of the second lens 30, and a projection of the outer peripheral wall of the third lens 40 on the image side surface 34 of the second lens 30 in the direction of the optical axis L is located on the concave surface.

The fourth lens element 50 is made of a high refractive index plastic material 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; 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 smaller than the diameter of the third lens 40.

The fifth lens element 60 is made of a plastic material with a high abbe number, and has an object-side surface 62 and an image-side surface 64. The object side surface 62 is concave at a position close to the optical axis L, and the circumference is a plane; the image-side surface 64 is concave near the optical axis L, and convex and concave at the circumference. The diameter of the fifth lens 60 is larger than that of the fourth lens 50.

In the fourth embodiment, the design parameters of the first lens 20 to the fifth lens 60 of the optical lens system 100 are shown in tables 7 and 8 below.

In table 7, FOV is a diagonal field angle of the optical lens system 100c, FNO is an f-number of the optical lens system 100c, f is a system focal length of the optical lens system 100c, and TTL is a system length of the optical lens system 100 c.

In the fourth embodiment, the parameters of the aspherical surfaces of the optical lens system 100c are shown in the following table 8:

table 8 shows aspheric data of the fourth embodiment, in which A4 to a20 are aspheric coefficients of 4 th to 20 th order of each surface.

Based on the aforementioned design, the system focal Length f of the fourth embodiment of the present application is 15.5mm, the system Length (TTL) is 15.9mm, the Field angle (FOV) at the maximum image height is 35.01 degrees, and the aperture value (f-number) is 2.4.

As can be seen from fig. 14 to 17, the optical lens system 100c in the fourth embodiment of the present application is beneficial to ensure that the light of the lens has a good imaging effect, and at the same time, the aperture value is effectively increased, and the system length of the optical lens system 100c is greatly reduced, so that the miniaturization of the optical lens system 100c can be satisfied, various aberrations can be effectively corrected, and the imaging quality is high.

Fifth embodiment

Referring to fig. 18 to fig. 21, an exit surface 102 of the right-angle prism 10a facing the first lens 20 of the optical lens system 100d of the present embodiment is a diffractive aspheric surface 103, that is, an exit surface of the right-angle prism 10a is a diffractive aspheric surface 103. The right-angle prism 10a is designed by adopting a diffraction surface of an aspheric surface substrate, and the diffraction center wavelength is 555nm; wherein the aspheric equation is:

wherein z is the rise of the curved surface; r is a radial coordinate; a is ₁ --a ₇ Are respectively even term r ² --r ¹⁴ The coefficient of (a); k is a conic coefficient; and c is the curvature.

The phase function equation for the diffraction surface is:

Diffraction surface coefficient:

diffraction order: 1;

structural wavelength: 555nm;

A1	-0.000309665369087255
		A2	1.61899442150391e-06
A3	-4.21702934691597e-07

The right-angle prism 10a is made of transparent glass, and the exit surface of the right-angle prism 10a is a diffractive aspheric surface.

The first lens element 20 is made of a glass material having a high Abbe number, and has an object-side surface 22 and an image-side surface 24. The object-side surface 22 is convex at a position near the optical axis L, the circumference is a plane, and the image-side surface 24 is concave at a position near the optical axis L.

The second lens element 30 is made of a high refractive index plastic material and has an object-side surface 32 and an image-side surface 34. The object side surface 32 is convex near the optical axis L, and the circumference may be a plane; the image-side surface 34 is concave near the optical axis L. The diameter of the second lens 30 is equal to the diameter of the first lens 20.

The third lens element 40 is made of a glass material having a high abbe number, 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 convex, the image-side surface 34 of the second lens element 30 is convex at a paraxial region L, and is flat at a periphery thereof; the diameter of the third lens 40 is smaller than the diameter of the second lens 30, and the projection of the outer peripheral wall of the third lens 40 on the image side surface 34 of the second lens 30 along the optical axis L is located on the concave surface.

The fourth lens element 50 is made of a high refractive index plastic material 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. The diameter of the fourth lens 50 is smaller than the diameter of the third lens 40.

The fifth lens element 60 is made of a plastic material with a high abbe number, and has an object-side surface 62 and an image-side surface 64. The object side surface 62 is concave near the optical axis L, and the circumference is a plane; the image-side surface 64 is concave near the optical axis L, and convex and concave at the circumference. The diameter of the fifth lens 60 is larger than that of the fourth lens 50.

In the fifth embodiment, the design parameters of the prism 10a to the fifth lens 60 of the optical lens system 100 are shown in tables 9 and 10 below.

In table 9, FOV is a diagonal field angle of the optical lens system 100d, FNO is an f-number of the optical lens system 100d, f is a system focal length of the optical lens system 100d, and TTL is a system length of the optical lens system 100 d.

In the fifth embodiment, the parameters of each aspherical surface of the optical lens system 100d are shown in the following table 10:

table 10 shows aspheric data of the fifth embodiment, in which A4 to a20 are aspheric coefficients of 4 th to 20 th orders of each surface.

Based on the aforementioned design, the system focal Length f of the fifth embodiment of the present application is 15.5mm, the system Length (TTL) is 15.8mm, the Field of view (FOV) at the maximum image height is 35.53 degrees, and the aperture value (f-number) is 2.4.

As can be seen from fig. 18 to 21, the optical lens system 100d in the fifth embodiment of the present application is beneficial to ensure that the light of the lens has a better imaging effect, and at the same time, the aperture value is effectively increased, and the system length of the optical lens system 100d is greatly reduced, so that the miniaturization of the optical lens system 100d can be satisfied, various aberrations can be effectively corrected, and a higher imaging quality is achieved.

Sixth embodiment

Referring to fig. 22 to fig. 25, an exit surface 102 of the right-angle prism 10a facing the first lens element 20 of the optical lens system 100e of the present embodiment is a diffractive aspheric surface 103, that is, an exit surface of the right-angle prism 10a is a diffractive aspheric surface 103. The right-angle prism 10a is designed by adopting a diffraction surface of an aspheric surface substrate, and the diffraction center wavelength is 555nm; wherein the aspheric equation is:

wherein z is the rise of the curved surface; r is a radial coordinate; a is a ₁ --a ₇ Are respectively even term r ² --r ¹⁴ The coefficients of (c); k is a conic coefficient; c is the curvature.

The phase function equation of the diffraction surface is:

Diffraction surface coefficient:

diffraction order: 1;

structural wavelength: 555nm;

in this embodiment, the optical lens system 100e includes, in order from an object side to an image side, a right-angle prism 10a with an aspheric diffraction light-emitting surface, a first lens element 20 with positive refractive power, an aperture stop 80, a second lens element 30 with negative refractive power, a third lens element 40 with positive refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with negative refractive power, an ir-cut filter 90 and an image plane 105.

The rectangular prism 10a is made of transparent glass, and the exit surface 102 of the rectangular prism 10a is a diffractive aspheric surface.

The second lens element 30 is made of a plastic material with a high refractive index, and has an object-side surface 32 and an image-side surface 34. Object-side surface 32 is convex; the image side surface 34 is concave near the optical axis L. The diameter of the second lens 30 is smaller than the diameter of the first lens 20, and the 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 the concave surface.

The third lens element 40 is made of a glass material having a high abbe number, 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 convex, and the image-side surface 34 of the second lens element 30 is convex at the paraxial region L; the diameter of the third lens 40 is smaller than that of the second lens 30, and a projection of the outer peripheral wall of the third lens 40 on the image side surface 34 of the second lens 30 along the optical axis L is located on the concave surface.

The fourth lens element 50 is made of a high refractive index plastic material and has an object-side surface 52 and an image-side surface 54. The object side 52 is a plane; the image side 54 is convex. The diameter of the fourth lens 50 is smaller than the diameter of the third lens 40.

In the sixth embodiment, the design parameters of the prisms 10a to the fifth lens 60 of the optical lens system 100e are shown in tables 11 and 12 below.

In table 11, FOV is a diagonal field angle of the optical lens system 100e, FNO is an f-number of the optical lens system 100e, f is a system focal length of the optical lens system 100e, and TTL is a system length of the optical lens system 100 e.

In the sixth embodiment, the parameters of the aspherical surfaces of the optical lens system 100e are shown in the following table 12:

table 12 shows aspheric data of the sixth embodiment, in which A4 to a20 are aspheric coefficients of 4 th to 20 th order of each surface.

Based on the aforementioned design, the system focal length f of the sixth embodiment of the present application is 15.23mm, the system length (TTL) is 15.6mm, the Field angle (FOV) at the maximum image height is 35.72 degrees, and the aperture value (f-number) reaches 2.4.

As can be seen from fig. 22 to 25, the optical lens system 100e in the sixth embodiment of the present application is beneficial to ensure that the light of the lens has a good imaging effect, and at the same time, the aperture value is effectively increased, and the system length of the optical lens system 100e is greatly reduced, so that the optical lens system 100e can be miniaturized, various aberrations can be effectively corrected, and the imaging quality is high.

In another embodiment, the exit surface 102 and the entrance surface 101 of the rectangular prism 10a are both diffraction surfaces, that is, the entrance surface 101 and the exit surface 102 of the rectangular prism 10a are both diffraction surfaces.

Seventh embodiment

Referring to fig. 26 to 29, an object-side surface or an image-side surface of at least one of the first lens element 20, the second lens element 30, the third lens element 40, the fourth lens element 50 and the fifth lens element 60 of the optical lens system 100f of the present embodiment is a diffraction surface; specifically, the diffraction surfaces are defined by at least one of the object-side surface or the image-side surface of the object-side surface 22 and the image-side surface 24 of the first lens element 20, the object-side surface 32 and the image-side surface 34 of the second lens element 30, the object-side surface 42 and the image-side surface 44 of the third lens element 400, the object-side surface 52 and the image-side surface 54 of the fourth lens element 50, and the object-side surface 62 and the image-side surface 64 of the fifth lens element 60. In this embodiment, the object-side surface 22 of the first lens element 20 is designed by using a diffraction surface with an aspheric base, and the central wavelength of diffraction is 555nm; wherein the aspheric equation is:

The phase function equation of the diffraction surface is:

Diffraction surface coefficients:

diffraction order: 1;

construction wavelength: 555nm;

A1	-0.000499635799275957
		A2	8.85001715852036e-06
A3	-9.55041858618262e-07

in this embodiment, the optical lens system 100f includes, in order from an object side to an image side, a right-angle prism with total reflection 10, 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 positive refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with negative refractive power, an ir-cut filter 90 and an image plane 105.

The right-angle prism 10 is made of transparent glass, and the emergent surface 102 of the right-angle prism 10 is perpendicular to the optical axis of the optical lens system 100 f.

The first lens element 20 is made of a plastic material with a high abbe number, and has an object-side surface 22 and an image-side surface 24. The object-side surface 22 is convex at a position near the optical axis L, the circumference is a plane, and the image-side surface 24 is concave. The object side surface 22 is a diffraction surface.

The second lens element 30 is made of a plastic material with a high refractive index, and has an object-side surface 32 and an image-side surface 34. The object side surface 32 is convex near the optical axis L, and the circumference is a plane; the image side 34 is concave. The diameter of the second lens 30 is smaller than the diameter of the first lens 20, and the 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 the concave surface.

The third lens element 40 is made of a glass material having a high abbe number, 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 convex, the image-side surface 34 of the second lens element 30 is convex at the paraxial region L, and is substantially planar at the periphery; 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 a high refractive index plastic material and has an object-side surface 52 and an image-side surface 54. The object side 52 is concave and the image side 54 is convex. The diameter of the fourth lens 50 is smaller than the diameter of the third lens 40.

The fifth lens element 60 is made of a plastic material with a high abbe number, and has an object-side surface 62 and an image-side surface 64. The object side surface 62 is concave at a position close to the optical axis L, and the circumference is a plane; the image-side surface 64 is concave near the optical axis L, and convex and concave at the circumference. The diameter of the fifth lens 60 is equal to the diameter of the fourth lens 50.

In the seventh embodiment, the design parameters of the first lens 20 to the fifth lens 60 of the optical lens system 100f are shown in tables 13 and 14 below.

In table 13, FOV is a diagonal field angle of the optical lens system 100f, FNO is an f-number of the optical lens system 100f, f is a system focal length of the optical lens system 100f, and TTL is a system length of the optical lens system 100 f.

In the seventh embodiment, the parameters of the aspherical surfaces of the optical lens system 100f are shown in the following table 14:

table 14 shows aspheric data of the seventh embodiment, in which A4 to a20 are aspheric coefficients of 4 th to 20 th order of each surface.

Based on the aforementioned design, the system focal length f of the seventh embodiment of the present application is 15.35mm, the system length (TTL) is 15.51mm, the Field angle (FOV) at the maximum image height is 32.43 degrees, and the aperture value (f-number) is 2.4.

As can be seen from fig. 26 to fig. 29, the optical lens system 100f in the seventh embodiment of the present application is beneficial to ensure that the light of the lens has a good imaging effect, and at the same time, the aperture value is effectively increased, and the system length of the optical lens system 100f is greatly reduced, so that the miniaturization of the optical lens system 100f can be satisfied, various aberrations can be effectively corrected, and the imaging quality is high.

Eighth embodiment

Referring to fig. 30 to 33, an object-side surface or an image-side surface of at least one of the first lens element 20, the second lens element 30, the third lens element 40, the fourth lens element 50, and the fifth lens element 60 of the optical lens system 100g of the present embodiment is a diffraction surface. In this embodiment, the object-side surface 22 of the first lens element 20 is designed as a diffraction surface with an aspheric substrate, and the central wavelength of diffraction is 555nm; wherein the aspheric equation is:

wherein z is the rise of the curved surface; r is a radial coordinate; a is a ₁ --a ₇ Are respectively even term r ² --r ¹⁴ The coefficient of (a); k is a conic coefficient; and c is the curvature.

The phase function equation of the diffraction surface is:

wherein A is ₁ 、A ₂ And A ₃ Respectively, coefficients of different terms, r being the radial coordinate.

Diffraction surface coefficient:

diffraction order: 1;

structural wavelength: 555nm;

A1	-0.000473307267053618
		A2	-1.80243211896302e-06
A3	-1.00401202971608e-06

in this embodiment, the optical lens system 100g includes, in order from an object side to an image side, a right-angle prism 10 with total reflection, 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 positive refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with negative refractive power, an ir-cut filter 90 and an image plane 105.

The right-angle prism 10 is made of transparent glass, and the emergent surface 102 of the right-angle prism 10 is perpendicular to the optical axis of the optical lens system 100 g.

The aperture stop 80 is provided around the object side surface 22 of the first lens element 20, and the aperture value of the optical lens system 100g is 2.4.

The first lens element 20 is made of a plastic material with a high Abbe number, and has an object-side surface 22 and an image-side surface 24. The object-side surface 22 is convex at a position near the optical axis L, and is flat at a circumference, and the image-side surface 24 is concave at a position near the optical axis L, and is flat at a circumference. The object side surface 22 is a diffraction surface.

The second lens element 30 is made of a plastic material with a high refractive index, and has an object-side surface 32 and an image-side surface 34. The object side 32 is convex and 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 the concave surface.

The third lens element 40 is made of a plastic material with a high abbe number, 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 convex, the image-side surface 44 of the third lens element 40 is convex at a paraxial region L, and is flat at a periphery thereof; 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 a high refractive index plastic material and has an object-side surface 52 and an image-side surface 54. The object side surface 52 is concave, and the image side surface 54 of the image side surface 54 is convex at the paraxial region L and is flat at the periphery. The diameter of the fourth lens 50 is smaller than the diameter of the third lens 40.

The fifth lens element 60 is made of a plastic material with a high abbe number, and has an object-side surface 62 and an image-side surface 64. The object-side surface 62 is concave at the paraxial region L and is flat at the circumference; the image-side surface 64 is concave near the optical axis L, and convex and concave at the circumference. The diameter of the fifth lens 60 is smaller than that of the fourth lens 50.

In the eighth embodiment, the design parameters of the first lens 20 to the fifth lens 60 of the optical lens system 100g are shown in tables 15 and 16 below.

In table 15, FOV is a diagonal field angle of the optical lens system 100g, FNO is an f-number of the optical lens system 100g, f is a system focal length of the optical lens system 100g, and TTL is a system length of the optical lens system 100 g.

In the eighth embodiment, the parameters of each aspherical surface of the optical lens system 100g are shown in the following table 16:

table 16 shows aspheric data of the eighth embodiment, in which A4 to a20 are aspheric coefficients of 4 th to 20 th order of each surface.

Based on the aforementioned design, the system focal length f of the eighth embodiment of the present application is 15.57mm, the system length (TTL) is 15.89mm, the Field angle (FOV) at the maximum image height is 32.47 degrees, and the aperture value (f-number) is 2.4.

As can be seen from fig. 30 to 33, the optical lens system 100g in the eighth embodiment of the present application is beneficial to ensure that the light of the lens has a good imaging effect, and at the same time, the aperture value is effectively increased, and the system length of the optical lens system 100g is greatly reduced, so that the miniaturization of the optical lens system 100g can be satisfied, various aberrations can be effectively corrected, and the imaging quality is high.

Ninth embodiment

Referring to fig. 34 to 38, an object-side surface or an image-side surface of at least one of the first lens element 20, the second lens element 30, the third lens element 40, the fourth lens element 50, and the fifth lens element 60 of the optical lens system 100h of the present embodiment is a diffraction surface. In this embodiment, the object-side surface 22 of the first lens element 20 is designed by using a diffraction surface with an aspheric base, and the central wavelength of diffraction is 555nm; wherein the aspheric equation is:

wherein z isRise of the curved surface; r is a radial coordinate; a is ₁ --a ₇ Are respectively even term r ² --r ¹⁴ The coefficient of (a); k is a conic coefficient; c is the curvature.

The phase function equation of the diffraction surface is:

Diffraction surface coefficients:

diffraction order: 1;

structural wavelength: 555nm;

A1	-0.00039104270267829
		A2	-6.47142582132948e-06
A3	-6.76442384379619e-07

in this embodiment, the optical lens system 100h includes, in order from an object side to an image side, a right-angle prism with total reflection 10, 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 positive refractive power, a fourth lens element 50 with positive refractive power, a fifth lens element 60 with negative refractive power, an ir-cut filter 90 and an image plane 105.

The first lens element 20 is made of a glass material having a high Abbe number, and has an object-side surface 22 and an image-side surface 24. The object-side surface 22 is convex at a position near the optical axis L, the circumference is a plane, and the image-side surface 24 is concave. The object-side surface 22 is a diffraction surface.

The second lens element 30 is made of a high refractive index plastic material and has an object-side surface 32 and an image-side surface 34. Object-side surface 32 is convex at paraxial region L and is planar at the circumference; the image side surface 34 is concave at the paraxial region L and flat at the periphery. 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 the concave surface.

The fourth lens element 50 is made of a high refractive index plastic material and has an object-side surface 52 and an image-side surface 54. The object-side surface 52 is concave at the paraxial region L and is circumferentially planar, and the image-side surface 54 of the image-side surface 54 is convex at the paraxial region L and is circumferentially planar. The diameter of the fourth lens 50 is smaller than the diameter of the third lens 40.

The fifth lens element 60 is made of a plastic material with a high abbe number, and has an object-side surface 62 and an image-side surface 64. The object-side surface 62 is concave at the paraxial region L and is flat at the circumference; the image-side surface 64 is concave near the optical axis L, and convex and concave at the circumference. The diameter of the fifth lens 60 is equal to the diameter of the fourth lens 50.

In the ninth embodiment, the design parameters of the first lens 20 to the fifth lens 60 of the optical lens system 100h are shown in tables 17 and 18 below.

In table 17, FOV is a diagonal field angle of the optical lens system 100h, FNO is an f-number of the optical lens system 100h, f is a system focal length of the optical lens system 100h, and TTL is a system length of the optical lens system 100 h.

In the ninth embodiment, the parameters of the aspherical surfaces of the optical lens system 100h are shown in the following table 18:

table 18 shows aspheric data of the ninth embodiment, in which A4 to a20 are aspheric coefficients of 4 th to 20 th order of each surface.

Based on the aforementioned design, the system focal Length f Of the ninth embodiment Of the present application is 15.54mm, the system Length (TTL) is 15.51mm, the Field angle (FOV) at the maximum image height is 32.9 degrees, and the aperture value (f-number) is 2.4.

As can be seen from fig. 34 to 38, the optical lens system 100h in the ninth embodiment of the present application is beneficial to ensure that the light of the lens has a good imaging effect, and at the same time, the aperture value is effectively increased, and the system length of the optical lens system 100h is greatly reduced, so that the miniaturization of the optical lens system 100h can be satisfied, various aberrations can be effectively corrected, and the imaging quality is high.

In other embodiments, the diffraction surfaces are two or more of the object-side surface 22 and the image-side surface 24 of the first lens element 20, the object-side surface 32 and the image-side surface 34 of the second lens element 30, the object-side surface 42 and the image-side surface 44 of the third lens element 400, the object-side surface 52 and the image-side surface 54 of the fourth lens element 50, and the object-side surface 62 and the image-side surface 64 of the fifth lens element 60. For example, in the optical lens system, the object-side surface 22 of the first lens 20 and the object-side surface 32 of the second lens 30 are both diffraction surfaces, the image-side surface 34 of the second lens 30 and the object-side surface 52 of the fourth lens 50 are both diffraction surfaces, or the object-side surface 22 of the first lens 20, the object-side surface 42 of the third lens 400, and the image-side surface 54 of the fourth lens 50 are all diffraction surfaces.

Referring to fig. 39, fig. 39 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 any one of the optical lens systems and the photosensitive element 310 of the present application. The light sensing element 310 is located on the image side of the optical lens system.

In the present application, the photosensitive element 310 may be a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS) Sensor. Preferably, the photosensitive element 310 is 1/1.56 "inch and the half image height (IMGH) is 5.12.

The image capturing device 300 can not only meet the requirement of large-image-surface long-focus photographing, but also bring huge benefits to the improvement of performance and the yield of a lens, and can effectively increase the aperture or reduce TTL (transistor-transistor logic), and carry out miniaturization design.

For the description of other features of the image capturing apparatus 300, please refer to the above description, which is not repeated herein.

Referring to fig. 40, fig. 40 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 housing 510 and the image capturing apparatus 300 of the present application. The image capturing device 300 is mounted on the housing 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

1. An optical lens system, comprising, in order from an object side to an image side:

a prism having total reflection;

a first lens element with positive refractive power;

a second lens element with negative refractive power;

a third lens element with positive refractive power;

a fourth lens element with positive refractive power; and

a fifth lens element with negative refractive power;

wherein the object-side surface and the image-side surface of the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element are aspheric, and the optical lens system satisfies the following conditional expressions:

2. An optical lens system as claimed in claim 1, characterized in that the prism is a right-angled prism, the exit face of which is directed towards the object-side face of the first lens, the optical axis of the optical lens system being perpendicular to the exit face.

3. An optical lens system according to claim 2, characterized in that the exit surface and/or the entrance surface of the right-angle prism is provided as a diffractive aspheric surface.

4. The optical lens system according to claim 2, wherein an object-side surface or an image-side surface of at least one of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is a diffraction surface.

5. An optical lens system as claimed in any one of claims 1 to 4, characterized in that the aperture value of the optical lens system is 2.4.

6. An optical lens system as claimed in any one of claims 1 to 4, characterized in that the focal length of the optical lens system is in the range 14mm to 16mm and the equivalent full frame focal length of the optical lens system is in the range 60mm to 67.5mm.

7. An optical lens system according to any one of claims 1 to 4, characterized in that the optical lens system satisfies the following conditional expression:

32°≤FOV≤38°；

wherein the FOV is a horizontal field angle of the optical lens system.

8. An optical lens system according to any one of claims 1 to 4, characterized in that the optical lens system satisfies the following conditional expression:

BFL>5.4mm；

wherein BFL is the back focal length of the optical lens system.

9. An optical lens system according to any one of claims 1 to 4, characterized in that the optical lens system satisfies the following conditional expression:

r1/r2>-0.15；

wherein r1 is a radius of an object-side surface of the first lens element, and r2 is a radius of an image-side surface of the first lens element.

10. An optical lens system as claimed in any one of claims 1 to 4, characterized in that the optical lens system satisfies the following conditional expression:

d1/d2<2.95；

11. An optical lens system according to any one of claims 1 to 4, characterized in that the optical lens system satisfies the following conditional expression:

D<2.95mm；

wherein D is the optical effective aperture of the fifth lens.

12. An optical lens system as claimed in any one of claims 1 to 4, characterized in that the length from the object-side surface of the first lens to the image-side surface of the fifth lens of the optical lens system in the direction of the optical axis is less than 10mm.

13. An optical lens system as claimed in claim 3, characterized in that the exit surface and/or the entrance surface of the right-angle prism adopts a diffraction surface of an aspheric base, and the central wavelength of diffraction is 555nm.

14. The optical lens system of claim 4, wherein the object side surface of the first lens is a diffraction surface of an aspheric substrate, and the central wavelength of diffraction is 555nm.

15. An optical lens system as claimed in claim 13 or 14, characterized in that the equation for the aspherical surface is:

wherein z is the rise of the curved surface; r is a radial coordinate; a is ₁ --a ₇ Are respectively even term r ² --r ¹⁴ The coefficient of (a); k is a conic coefficient; c is the curvature;

the phase function equation of the diffraction surface is:

wherein A is ₁ 、A ₂ And A ₃ Are respectively notCoefficient of the same term, r is the radial coordinate.

16. The optical lens system of claim 1, wherein the object-side surface of the first lens element is convex, the image-side surface of the first lens element is concave, the radius of curvature of the object-side surface of the first lens element is in a range of 7.6mm to 8.5mm, and the radius of curvature of the image-side surface of the first lens element is in a range of-80 mm to-90 mm.

17. The optical lens system of claim 1, wherein the object-side surface of the second lens is convex and the image-side surface of the second lens is concave; the curvature radius range of the object side surface of the second lens is 6.5 mm-8 mm, and the curvature radius range of the image side surface of the second lens is 3.7 mm-4.2 mm.

18. The optical lens system of claim 1, wherein the object-side surface of the third lens element is convex, the image-side surface of the third lens element is convex, the radius of curvature of the object-side surface of the third lens element ranges from 24.5mm to 25.5mm, and the radius of curvature of the image-side surface of the third lens element ranges from-10 mm to-10.5 mm.

19. The optical lens system of claim 1, wherein the object-side surface of the fourth lens element is concave and the image-side surface of the fourth lens element is convex; the curvature radius range of the object side surface of the fourth lens is 55 mm-105 mm, and the curvature radius range of the image side surface of the fourth lens is-30 mm-55 mm.

20. The optical lens system of claim 1, wherein the object-side surface of the fifth lens element is concave at a paraxial region, the image-side surface of the second lens element is concave at a paraxial region, the radius of curvature of the object-side surface of the fifth lens element ranges from 20mm to 45mm, and the radius of curvature of the image-side surface of the fifth lens element ranges from 4.5mm to 5.5mm.

21. An image capturing apparatus, comprising:

the optical lens system of any one of claims 1-20; and

a photosensitive element located on an image side of the optical lens system.

22. An electronic device, comprising:

a housing; and

the image capturing device of claim 21, mounted to said housing.