WO2020125383A1 - Lentille et dispositif terminal - Google Patents

Lentille et dispositif terminal Download PDF

Info

Publication number
WO2020125383A1
WO2020125383A1 PCT/CN2019/122306 CN2019122306W WO2020125383A1 WO 2020125383 A1 WO2020125383 A1 WO 2020125383A1 CN 2019122306 W CN2019122306 W CN 2019122306W WO 2020125383 A1 WO2020125383 A1 WO 2020125383A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
object side
image side
image
focal length
Prior art date
Application number
PCT/CN2019/122306
Other languages
English (en)
Chinese (zh)
Inventor
卢建龙
Original Assignee
华为技术有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2020125383A1 publication Critical patent/WO2020125383A1/fr

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
    • G02B13/004—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 four lenses
    • 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

Definitions

  • This application relates to the field of lens technology, in particular to a lens and terminal equipment.
  • Camera lenses are not limited to functions such as photographing and camera shooting.
  • Near-infrared lenses for 3D modeling, face recognition, motion recognition and other functions are also rapidly developing.
  • the lens is a key component of the lens module, and its performance is important Sex is increasingly prominent.
  • the TOF system In near-infrared applications, especially the time-of-flight (TOF) 3D modeling system in 3D applications, the TOF system needs to obtain the depth information of each point on the measured object, so the brightness of the lens is required very high. And because it is limited to the packaging requirements of portable devices, the control of the lens size is also very strict. At present, the mature lens structure cannot meet the requirements of the TOF system due to its poor depth recognition accuracy.
  • the lens and the terminal device provided by the embodiments of the present application solve the problem of poor accuracy of lens depth recognition in the prior art.
  • the present application provides a lens including a lens group including a first lens, a second lens, a third lens, and a fourth lens arranged in order from the object side to the image side, the first lens
  • the object side is convex
  • the relative illuminance RI of the lens group and the cosine of the half field of view (HFOV) of the lens group are the fourth power cos 4 (HFOV) satisfying: RI/cos 4 (HFOV ) ⁇ 1
  • the effective focal length f of the lens group and the entrance pupil diameter (EPD) of the lens group satisfy: f/EPD ⁇ 1.3.
  • the fourth power of the cosine value of the half angle of view is a reference standard for whether the relative illuminance of the lens is high
  • the relative illuminance RI of the lens group and the half angle of view of the lens group in the embodiment of the present application The ratio of the fourth power of the cosine value is greater than or equal to 1, so the relative illuminance of the lens group is greater than or equal to the reference standard, the relative illuminance of the lens group is larger, so that the brightness of the lens is higher, thereby increasing the depth of the lens structure Recognition accuracy.
  • the effective focal length f of the lens group and the entrance pupil diameter EPD of the lens group satisfy: f/EPD ⁇ 1.3, the aperture value of the lens group is made smaller and the aperture is larger, so that sufficient light flux can be ensured to improve Identify accuracy and increase signal-to-noise ratio.
  • the object side surface of the first lens is convex, it focuses first when light enters the first lens, which helps to reduce the aperture of the rear lens and achieve miniaturization. Therefore, the lens provided by the embodiment of the present application can take into account the requirements of the TOF system on the lens illumination and aperture value on the premise of ensuring the miniaturization of the lens, thereby meeting the depth recognition accuracy requirements of the TOF system.
  • the effective focal length f of the lens group, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy: 0 ⁇
  • the lens be miniaturized, but also a larger viewing angle and a larger aperture can be achieved.
  • the image side of the fourth lens is provided with an imaging surface, the effective focal length f of the lens group and the diagonal length of the effective pixel area on the imaging surface 2*Imh(Image)high meet: f/(2*Imh ) ⁇ 0.635.
  • f/(2*Imh ) ⁇ 0.635 a larger angle of view can be realized.
  • the curvature radius R31 of the object side of the third lens and the curvature radius R32 of the image side of the third lens satisfy: 0 ⁇ (R31+R32)/(R31-R32) ⁇ 10.
  • the curvature radius of the object side and the image side of the third lens can be within a reasonable range, which can not only ensure the processability of the third lens, but also make the object side and the image side of the third lens satisfy the incident of each field of view
  • the incidence angle of the third lens is required to meet the spherical aberration requirements of the imaging system.
  • the refractive index N1 of the material of the first lens, the Abbe number V2 of the material of the second lens, and the Abbe number of the material of the third lens are V3, satisfying: N1*(V3-V2) ⁇ 20.
  • the refractive index of the third lens material N3 ⁇ 1.58 is provided.
  • the curvature radius R41 of the object side of the fourth lens and the system focal length f can satisfy: (R41/f) ⁇ (1/2.5). In this way, it is possible to ensure that the lens has good manufacturability in processing and manufacturing while satisfying the effective focal length of the lens group, and reduce processing difficulty.
  • the image side of the first lens is concave, and both the object side and the image side of the first lens are aspherical. Aspheric lenses can improve aberrations, thereby improving imaging quality.
  • the first lens has negative power
  • the second lens, third lens, and fourth lens all have positive power.
  • Such setting is beneficial for adjusting the optical path, shortening the optical path length, and realizing a larger angle of view while ensuring the miniaturization of the lens.
  • the object side and/or the image side of the second lens have an inflection point, and the object side and the image side of the second lens are both aspherical.
  • the inflection point of the second lens is helpful to balance the light aberrations at different apertures, to achieve a larger aperture, and at the same time to achieve higher illumination at the edges.
  • the object side of the third lens is concave
  • the image side of the third lens is convex
  • the object side and image side of the third lens are both aspherical.
  • Aspheric lenses can improve aberrations, thereby improving imaging quality.
  • the object side and/or the image side of the fourth lens have an inflection point, and the object side and the image side of the fourth lens are both aspherical.
  • the inflection point on the fourth lens is beneficial to achieve less distortion and at the same time achieve higher illumination at the edges.
  • an aperture stop is provided between the first lens and the second lens.
  • the aperture diaphragm can effectively improve the imaging quality of the lens.
  • a filter is provided between the imaging surface and the fourth lens, so that light of a desired wavelength can be selected to filter out interference light to improve imaging quality.
  • an embodiment of the present application further provides a terminal device, which includes the lens described in any of the foregoing embodiments.
  • the terminal device includes a TOF system
  • the TOF system includes a laser emitting module and a laser receiving module
  • the laser receiving module includes the lens and the sensor
  • the laser emitting module is used to target An object emits an optical signal
  • the lens is used to receive the optical signal reflected by the target object and deliver the optical signal to the sensor after focusing.
  • the terminal device provided by the embodiment of the present application adopts the lens described in any of the above embodiments, so it can meet the requirements of the TOF system for the lens illumination and aperture value on the premise of ensuring the miniaturization of the lens, so as to meet the The TOF system's depth recognition accuracy requirements.
  • the terminal can realize 3D modeling, face recognition, motion recognition and other functions.
  • FIG. 1 is a schematic structural diagram of a lens according to a specific embodiment of the application.
  • FIG. 2 is a schematic diagram of the optical path of a lens according to a specific embodiment of the application.
  • FIG. 3 is a distortion curve diagram of a lens according to a specific embodiment of the application.
  • FIG. 4 is a spherical aberration curve diagram of a lens of a specific embodiment of the present application.
  • FIG. 5 is a graph of relative illuminance of a lens according to a specific embodiment of the application.
  • FIG. 6 is a schematic structural diagram of a lens according to a second embodiment of this application.
  • FIG. 7 is a distortion curve diagram of a lens of a specific embodiment of the present application.
  • FIG. 8 is a spherical aberration curve diagram of a lens of a specific embodiment 2 of the present application.
  • FIG. 10 is a schematic structural diagram of a third lens according to a specific embodiment of the application.
  • FIG. 11 is a distortion curve diagram of a third lens of a specific embodiment of this application.
  • FIG. 12 is a spherical aberration curve diagram of a third lens of a specific embodiment of this application.
  • 13 is a graph of the relative illuminance curve of the third lens of the specific embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a fourth lens according to a specific embodiment of the application.
  • 15 is a distortion curve diagram of a fourth lens of a specific embodiment of this application.
  • 16 is a spherical aberration curve diagram of a fourth lens of a specific embodiment of this application.
  • 17 is a graph of the relative illuminance curve of the fourth lens of the specific embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of a fifth lens according to a specific embodiment of the application.
  • FIG. 19 is a distortion curve diagram of a fifth lens according to a specific embodiment of this application.
  • FIG. 20 is a spherical aberration curve diagram of a fifth lens according to a specific embodiment of the application.
  • 21 is a graph of relative illuminance curves of a fifth lens according to a specific embodiment of the application.
  • FIG. 22 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • the embodiments of the present application relate to a lens and a terminal device provided with the lens.
  • the terminal device may be a mobile phone, a mobile computer, a handheld game machine, a tablet computer, or the like.
  • Lens It is a component that uses the refraction principle of the lens to make the scene light pass through the lens to form a clear image on the focusing plane.
  • Optical power equal to the difference between the beam convergence of the image side and the beam convergence of the object side, which characterizes the ability of the optical system to deflect light.
  • Aperture value the ratio of the total focal length of the lens to the diameter of the entrance pupil.
  • Curvature is a value used to indicate the degree of curvature of a curve at a certain point. The greater the curvature, the greater the degree of curvature of the curve, and the reciprocal of the curvature is the radius of curvature.
  • Contrast refers to the ratio of the edge illumination of the image plane to the center illumination.
  • Spherical aberration is caused by the difference in the ability of the central and peripheral regions of the lens to converge the beam.
  • the far-axis beam is refracted much more than the paraxial beam when passing through the lens, so the beam scattered by the same object point does not intersect at a point after passing through the lens, but becomes a diffuse circular spot on the lens phase plane .
  • the imaging becomes blurred, and this imaging defect is spherical aberration.
  • Aperture diaphragm The diaphragm with the smallest incident aperture angle is called the aperture diaphragm.
  • Entrance pupil Corresponding to the exit pupil, the conjugate image of the aperture stop in the object space is called the "entrance pupil".
  • the position and diameter of the entrance pupil represent the position and diameter of the incident beam.
  • Half field of view refers to the half of the maximum angle that the lens can shoot.
  • Object side The surface closest to the real object on the lens is the object side.
  • Image side The surface closest to the imaging plane on the lens is the image side.
  • Effective focal length the distance from the main plane of the optical system to the corresponding focal point.
  • an embodiment of the present application provides a lens including a lens group including a first lens 1, a second lens 2, and a third lens arranged in order from the object side to the image side 3 and the fourth lens 4, the object side surface 11 of the first lens 1 is a convex surface, the relative illuminance RI of the lens group and the fourth order of the cosine value of the half field of view (HFOV) of the lens group
  • the square cos 4 (HFOV) satisfies: RI/cos 4 (HFOV) ⁇ 1
  • the effective focal length f of the lens group and the entrance pupil diameter EPD of the lens group satisfy: f/EPD ⁇ 1.3.
  • the fourth power of the cosine value of the half angle of view is a reference standard for whether the relative illuminance of the lens is high
  • the relative illuminance RI of the lens group and the half angle of view of the lens group in the embodiment of the present application The ratio of the fourth power of the cosine value is greater than or equal to 1, so the relative illuminance of the lens group is greater than or equal to the reference standard, the relative illuminance of the lens group is larger, so that the brightness of the lens is higher, thereby increasing the depth of the lens structure Recognition accuracy.
  • the aperture value of the lens group is made smaller and the aperture is larger, so that sufficient light flux can be ensured to improve Imaging quality and recognition accuracy, increase signal-to-noise ratio.
  • the object side surface 11 of the first lens 1 is a convex surface, when the light enters the first lens 1, it is focused first, which is conducive to reducing the aperture of the rear lens and achieving miniaturization. Therefore, the lens provided by the embodiment of the present application can take into account the requirements of the TOF system on the lens illumination and aperture value on the premise of ensuring the miniaturization of the lens, thereby meeting the depth recognition accuracy requirements of the TOF system.
  • the effective focal length f of the lens group, the effective focal length f1 of the first lens 1 and the effective focal length f2 of the second lens 2 can satisfy: 0 ⁇
  • the effective focal length f of the lens group, the effective focal length f1 of the first lens 1 and the effective focal length f2 of the second lens 2 satisfy the above relationship, which can guarantee the lens Miniaturization can achieve a larger viewing angle and a larger aperture.
  • the image side of the fourth lens 4 has an imaging surface 5.
  • the effective focal length f of the lens group and the effective pixel area on the imaging surface 5 can be diagonally 2*Imh Satisfaction: f/(2*Imh) ⁇ 0.635. Thereby achieving a larger angle of view.
  • the imaging surface 5 is the surface of the film or the light-receiving surface of the sensor.
  • the curvature radius R31 of the object side surface 31 of the third lens 3 and the curvature radius R32 of the image side surface 32 of the third lens 3 satisfy: 0 ⁇ (R31+R32)/(R31-R32) ⁇ 10.
  • the curvature radius of the object side 31 and the image side of the third lens 3 can be within a reasonable range, which can not only ensure the processability of the third lens 3, but also make the object side 31 and the image side of the third lens 3 Satisfying the angle of incidence of each field of view into the third lens 3 to meet the spherical aberration requirements of the imaging system.
  • the refractive index N1 of the material of the first lens 1, the Abbe number V2 of the material of the second lens 2 and the Abbe number of the material of the third lens 3 are V3 satisfying: N1*(V3-V2) ⁇ 20.
  • the Abbe number is the dispersion coefficient of the lens material, which is used to characterize the degree of dispersion of light passing through the lens. The larger the Abbe number, the smaller the dispersion and the clearer the imaging. The higher the refractive index of the lens material, the stronger the ability to refract the incident light.
  • the refractive index N1 of the material of the first lens 1 and the Abbe number V2 of the material of the second lens 2 and the Abbe number of the material of the third lens 3 are V3 satisfy the above relationship, the degree of dispersion and the refractive index of the lens can be taken into account , Which can improve the aberration of the lens group, while increasing the angle of view and improving the recognition range.
  • the refractive index N3 of the material of the third lens 3 is ⁇ 1.58, which can improve the aberration of the lens group and achieve better resolution.
  • the curvature radius R41 of the object side surface 41 of the fourth lens 4 and the system focal length f can satisfy: (R41/f) ⁇ (1/2.5). In this way, it is possible to ensure that the lens has good manufacturability in processing and manufacturing while satisfying the effective focal length of the lens group, and reduce processing difficulty.
  • the object side surface 11 of the first lens 1 is convex, and the image side surface 12 of the first lens 1 is concave; the object side 21 of the second lens 2 is convex, the second The image side 22 of the lens 2 is concave; the object side 31 of the third lens 3 is concave, and the image side 32 of the third lens 3 is convex; the object side 41 of the fourth lens 4 is convex, and the image side 42 of the fourth lens 4 It is concave.
  • the above-mentioned definition of the convex surface and the concave surface is the definition of the paraxial region of each surface, that is, the region near the main optical axis O.
  • the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4 in the lens group all have optical power.
  • the optical power is used to characterize the deflection ability of the optical system to the incident light. The larger the absolute value of the optical power, the greater the deflection ability. Therefore, the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4 all have a deflection effect on the incident light, thereby facilitating adjustment of the angle of view of the lens to the required value of the TOF system.
  • the first lens 1 may have positive power or negative power
  • the second lens 2 may have positive power or negative power
  • the third lens 3 may have positive power or negative power
  • the fourth lens 4 may have positive power or negative power, which is not limited herein.
  • a positive power value means that the optical system deflects incident parallel light beams parallel to the optical axis.
  • a negative power value means that the optical system deflects incident parallel light beams parallel to the optical axis. of.
  • the first lens 1 has negative power
  • the second lens 2, the third lens 3, and the fourth lens 4 all have positive power.
  • Such setting is beneficial for adjusting the optical path, shortening the optical path length, and realizing a larger angle of view while ensuring the miniaturization of the lens.
  • an inflection point may be formed on the object side 21 and/or image side of the second lens 2, as shown in FIG. 1, at least one inflection point 211 is formed on the object side 21 of the second lens 2, the image of the second lens 2 At least one inflection point 221 is formed on the side surface 22, and the inflection point of the second lens 2 is beneficial to balance light aberrations at different apertures, achieve a larger aperture, and at the same time facilitate higher illumination at the edges.
  • an inflection point may also be formed on the object side 41 and/or image side of the fourth lens 4, as shown in FIG.
  • At least one inflection point 411 is formed on the object side 41 of the fourth lens 4, the image of the fourth lens 4 At least one inflection point 421 is formed on the side surface 42, and the inflection point on the fourth lens 4 is beneficial to achieve less distortion and at the same time achieve higher illumination at the edge.
  • an aperture stop 6 can be provided between the first lens 1 and the second lens 2, and the aperture stop 6 can effectively improve the imaging quality of the lens. It should be noted that the aperture stop 6 can also be disposed at other positions, such as the object side of the first lens 1, between the second lens 2 and the third lens 3, between the third lens 3 and the fourth lens 4, etc. , Not limited here.
  • a filter 7 can also be provided between the imaging surface 5 and the fourth lens 4, so that light of a desired wavelength can be selected to filter out interference light to improve imaging quality.
  • both the object side 11 and the image side of the first lens 1 may be aspherical.
  • one or more of the object side 21 and the image side of the second lens 2, the object side 31 and the image side of the third lens 3, and the object side 41 and the image side of the fourth lens 4 may also be Aspherical.
  • Aspheric surfaces are surfaces where the curvature changes, and spherical surfaces are surfaces where the curvature is constant. Aspheric lenses can improve aberrations, thereby improving imaging quality.
  • the surface parameter of each aspheric surface can be expressed by the following equation:
  • x is the abscissa of the point on the aspheric surface
  • h is the ordinate of the point on the aspheric surface
  • c is the curvature of the aspheric surface at the optical center (that is, the intersection of the lens and the optical axis)
  • k is the preset conic coefficient
  • Ai is the aspheric coefficient of order i.
  • FIG. 1 is a schematic diagram of a lens structure of a specific embodiment 1.
  • the lens includes a first lens 1 and a second lens 2 arranged in sequence along the main optical axis O from the object to the imaging surface 5 ,
  • the lens of the specific embodiment 1 meets the limited range of the parameters of the lens group in this application.
  • the lens group of the specific embodiment 1 can take into account the requirements of the TOF system for the lens illuminance and aperture value on the premise of ensuring the miniaturization of the lens, thereby To meet the depth recognition accuracy requirements of the TOF system.
  • FIG. 3 shows the distortion curve of the lens of the first embodiment.
  • the abscissa of FIG. 3 represents the distortion (which may be the ratio of the actual image height on the imaging surface 5 to the ideal image height as a percentage), and the ordinate represents the image height. It can be seen from Fig. 3 that the optical distortion is controlled within the range of 0 to 2%.
  • FIG. 4 shows the spherical aberration curve of the lens of the first embodiment.
  • the abscissa of FIG. 4 is the intersection point of light rays incident on the same object point at different angles and the optical axis.
  • the ordinate is the normalized height of the incident light at the entrance pupil. It can be seen from Fig. 4 that the spherical aberration is controlled within a relatively small range.
  • the normalized height refers to a dimensionless ratio value obtained by normalizing the height of each incident ray at the entrance pupil. That is to say, the maximum value of the height is 1, and the remaining height values are expressed by the proportional relationship with the maximum value. Normalization is a way of simplifying calculations, that is, dimensional expressions are transformed into non-dimensional expressions and transformed into scalar quantities.
  • FIG. 5 shows the relative illuminance curve of the lens of the first embodiment.
  • the relative illumination (RI) refers to the ratio of the edge illumination of the imaging plane 5 to the center illumination.
  • the center (0, 0) of FIG. 5 is the center of the imaging surface 5 and the brightness is 100%. As it moves toward the edge of the imaging surface 5, the brightness of the edge gradually becomes darker until the brightness becomes approximately 50 at a distance of 1.4 mm from the center %.
  • the optical distortion, spherical aberration, and relative illuminance of the lens of the first embodiment can meet the imaging requirements, thereby ensuring good imaging quality.
  • the lens includes a first lens 1, a second lens 2, and a second lens 2 arranged in sequence along the main optical axis O from the object to the imaging surface 5.
  • the lens of the specific embodiment 2 meets the limited range of the parameters of the lens group in this application.
  • the lens group of the specific embodiment 2 can take into account the requirements of the TOF system for the lens illuminance and aperture value on the premise of ensuring the miniaturization of the lens, thereby To meet the depth recognition accuracy requirements of the TOF system.
  • FIG. 7 shows the distortion curve of the lens of the second embodiment.
  • the abscissa of FIG. 7 represents distortion (which may be the ratio of the actual image height on the imaging surface 5 to the ideal image height as a percentage), and the ordinate represents the image height. It can be seen from FIG. 7 that the optical distortion is controlled within the range of 0 to 2%.
  • FIG. 8 shows the spherical aberration curve of the lens of the second embodiment.
  • the abscissa of FIG. 8 is the intersection point of light rays incident on the same object point at different angles and the optical axis.
  • the ordinate is the normalized height of the incident light at the entrance pupil. It can be seen from Fig. 8 that the spherical aberration is controlled within a relatively small range.
  • FIG. 9 shows the relative illuminance curve of the lens of the second embodiment.
  • the relative illumination (RI) refers to the ratio of the edge illumination of the imaging plane 5 to the center illumination.
  • the center (0, 0) in FIG. 9 is the center of the imaging surface 5 and the brightness is 100%. As the image moves toward the edge of the imaging surface 5, the brightness of the edge gradually becomes darker until the brightness becomes approximately 50 at a distance of 1.4 mm from the center %.
  • the optical distortion, spherical aberration, and relative illuminance of the lens of the second embodiment can meet imaging requirements, thereby ensuring good imaging quality.
  • FIG. 10 shows the lens structure of the third embodiment.
  • the lens includes a first lens 1, a second lens 2, and a second lens 2 arranged in sequence along the main optical axis O from the object to the imaging surface 5.
  • the lens of the specific embodiment 3 meets the limited range of the parameters of the lens group in this application.
  • the lens group of the specific embodiment 3 can take into account the requirements of the TOF system for the lens illuminance and aperture value on the premise of ensuring the miniaturization of the lens, thereby To meet the depth recognition accuracy requirements of the TOF system.
  • FIG. 11 shows the distortion curve of the lens of the third embodiment.
  • the abscissa of FIG. 11 represents distortion (which may be the ratio of the actual image height on the imaging surface 5 to the ideal image height as a percentage), and the ordinate represents the image height. It can be seen from FIG. 11 that the optical distortion is controlled in the range of 0 to 2%.
  • FIG. 12 shows the spherical aberration curve of the lens of the third embodiment.
  • the abscissa of FIG. 12 is the intersection of the light rays incident on the same object point at different angles and the optical axis.
  • the ordinate is the normalized height of the incident light at the entrance pupil. It can be seen from Fig. 12 that the spherical aberration is controlled within a relatively small range.
  • FIG. 13 shows the relative illuminance curve of the lens of the third embodiment.
  • the relative illumination (RI) refers to the ratio of the edge illumination of the imaging plane 5 to the center illumination.
  • the center (0, 0) of FIG. 13 is the center of the imaging surface 5 and the brightness is 100%. As the image moves toward the edge of the imaging surface 5, the brightness of the edge gradually becomes darker until the brightness becomes approximately 50 at 1.4 mm from the center %.
  • FIG. 14 shows a lens structure of a specific embodiment 4.
  • the lens includes a first lens 1, a second lens 2, and a second lens 2 arranged in sequence along the main optical axis O from the object to the imaging surface 5.
  • the lens of the specific embodiment 4 meets the limited range of the parameters of the lens group in this application.
  • the lens group of the specific embodiment 4 can take into account the requirements of the TOF system for the lens illuminance and aperture value on the premise of ensuring the miniaturization of the lens, thereby To meet the depth recognition accuracy requirements of the TOF system.
  • FIG. 15 shows the distortion curve of the lens of the fourth embodiment.
  • the abscissa of FIG. 15 represents distortion (which may be the ratio of the actual image height on the imaging surface 5 to the ideal image height as a percentage), and the ordinate represents the image height. It can be seen from FIG. 15 that the optical distortion is controlled in the range of 0 to 2%.
  • FIG. 16 shows the spherical aberration curve of the lens of the fourth embodiment.
  • the abscissa of FIG. 16 is the intersection of the light rays incident at different angles on the same object point and the optical axis.
  • the ordinate is the normalized height of the incident light at the entrance pupil. It can be seen from Fig. 16 that the spherical aberration is controlled within a relatively small range.
  • FIG. 17 shows the relative illuminance curve of the lens of the fourth embodiment.
  • the relative illumination (RI) refers to the ratio of the edge illumination of the imaging plane 5 to the center illumination.
  • the center (0, 0) of FIG. 17 is the center of the imaging surface 5 and the brightness is 100%. As the image moves toward the edge of the imaging surface 5, the brightness of the edge gradually becomes darker until the brightness becomes approximately 50 at 1.4 mm from the center %.
  • FIG. 18 shows a lens structure of a specific embodiment 5.
  • the lens includes a first lens 1, a second lens 2, and a second lens 2 arranged in sequence along the main optical axis O from the object to the imaging surface 5.
  • the lens of the specific embodiment 5 meets the limited range of the parameters of the lens group in this application.
  • the lens group of the specific embodiment 5 can take into account the requirements of the TOF system for the lens illuminance and aperture value on the premise of ensuring the miniaturization of the lens, thereby To meet the depth recognition accuracy requirements of the TOF system.
  • FIG. 19 shows the distortion curve of the lens of the fifth embodiment.
  • the abscissa of FIG. 19 represents distortion (which may be the ratio of the actual image height on the imaging surface 5 to the ideal image height as a percentage), and the ordinate represents the image height. It can be seen from FIG. 19 that the optical distortion is controlled within the range of 0 to 2%.
  • FIG. 20 shows the spherical aberration curve of the lens of the fifth embodiment.
  • the abscissa of FIG. 20 is the intersection of light rays incident at different angles on the same object point and the optical axis.
  • the ordinate is the normalized height of the incident light at the entrance pupil. It can be seen from Fig. 20 that the spherical aberration is controlled within a relatively small range.
  • FIG. 21 shows the relative illuminance curve of the lens of the fifth embodiment.
  • the relative illumination (RI) refers to the ratio of the edge illumination of the imaging plane 5 to the center illumination.
  • the center (0,0) of FIG. 21 is the center of the imaging surface 5 and the brightness is 100%. As the image moves toward the edge of the imaging surface 5, the brightness of the edge gradually becomes darker until the brightness becomes approximately 50 at a distance of 1.4 mm from the center %.
  • the optical distortion, spherical aberration, and relative illuminance of the lens of Embodiment 5 can all meet imaging requirements, thereby ensuring good imaging quality.
  • an embodiment of the present application further provides a terminal device, which includes the lens described in any of the foregoing embodiments.
  • the terminal device 100 may further include a TOF system, the TOF system includes a laser emitting module 101 and a laser receiving module, and the laser receiving module includes the lens 102 and a sensor 103.
  • the laser emitting module 101 is used to emit an optical signal to a target
  • the lens 102 is used to receive the optical signal reflected by the target and deliver the optical signal to the sensor 103 after focusing.
  • the sensor 103 may be a photosensitive sensor, such as a charge-coupled device (English: Charge-coupled Device, abbreviated as CCD), a complementary metal oxide semiconductor (English: Complementary Metal-Oxide-Semiconductor, abbreviated as CMOS) photosensitive device, and the like.
  • CCD Charge-coupled Device
  • CMOS Complementary Metal-Oxide-Semiconductor
  • the terminal device provided by the embodiment of the present application adopts the lens described in any of the above embodiments, so it can meet the requirements of the TOF system for the lens illumination and aperture value on the premise of ensuring the miniaturization of the lens, so as to meet the The TOF system's depth recognition accuracy requirements.
  • the terminal can realize 3D modeling, face recognition, motion recognition and other functions.
  • the terminal device provided by the embodiment of the present application may be a mobile phone, a tablet computer, a notebook computer, a video camera, an in-vehicle computer, or the like.
  • the embodiment of the present invention does not specifically limit the specific form of the terminal.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

Lentille et dispositif terminal La lentille comprend un assemblage de lentilles, ce dernier comprenant une première lentille (1), une deuxième lentille (2), une troisième lentille (3) et une quatrième lentille (4) agencées successivement depuis le côté objet vers le côté image. Le côté objet (11) de la première lentille (1) a une surface convexe. L'éclairage relatif (RI) de l'assemblage de lentilles et le biquadratique cos 4 (HFOV) d'une valeur cosinusoïdale à un angle de demi-vision de l'assemblage de lentilles satisfont : RI/cos 4 (HFOV)≥1. La longueur focale effective totale (f) de l'assemblage de lentilles et le diamètre de pupille d'entrée (EPD) de l'assemblage de lentilles satisfont à f/EPD≤1,3.
PCT/CN2019/122306 2018-12-21 2019-12-02 Lentille et dispositif terminal WO2020125383A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811596170.5A CN109581626A (zh) 2018-12-21 2018-12-21 一种镜头及终端设备
CN201811596170.5 2018-12-21

Publications (1)

Publication Number Publication Date
WO2020125383A1 true WO2020125383A1 (fr) 2020-06-25

Family

ID=65931861

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/122306 WO2020125383A1 (fr) 2018-12-21 2019-12-02 Lentille et dispositif terminal

Country Status (2)

Country Link
CN (1) CN109581626A (fr)
WO (1) WO2020125383A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109581626A (zh) * 2018-12-21 2019-04-05 华为技术有限公司 一种镜头及终端设备
CN110174745B (zh) * 2019-03-07 2023-09-01 玉晶光电(厦门)有限公司 光学成像镜头
CN109991721B (zh) * 2019-05-06 2024-04-02 浙江舜宇光学有限公司 光学透镜组
CN211531155U (zh) * 2019-07-11 2020-09-18 华为技术有限公司 一种镜头、摄像头和电子设备
TWI766658B (zh) * 2021-04-23 2022-06-01 大立光電股份有限公司 光學鏡片系統及飛時測距感測模組

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005321742A (ja) * 2004-05-10 2005-11-17 Hideaki Ishizuki 超広角高解像度レンズ
CN102866482A (zh) * 2012-10-18 2013-01-09 南京波长光电科技有限公司 一种鱼眼红外镜头
CN105487207A (zh) * 2015-09-11 2016-04-13 厦门颉轩光电有限公司 一种移动设备镜头模组
CN107436478A (zh) * 2017-09-14 2017-12-05 浙江舜宇光学有限公司 光学成像镜头
CN108319965A (zh) * 2018-03-28 2018-07-24 江苏珩图智能科技有限公司 一种利用图像获取声音的装置及方法
CN109581626A (zh) * 2018-12-21 2019-04-05 华为技术有限公司 一种镜头及终端设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005316010A (ja) * 2004-04-27 2005-11-10 Nidec Copal Corp 撮像レンズ
JP2015175876A (ja) * 2014-03-13 2015-10-05 富士フイルム株式会社 撮像レンズおよび撮像レンズを備えた撮像装置
CN104166220B (zh) * 2014-07-15 2016-05-18 浙江舜宇光学有限公司 3d交互式镜头

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005321742A (ja) * 2004-05-10 2005-11-17 Hideaki Ishizuki 超広角高解像度レンズ
CN102866482A (zh) * 2012-10-18 2013-01-09 南京波长光电科技有限公司 一种鱼眼红外镜头
CN105487207A (zh) * 2015-09-11 2016-04-13 厦门颉轩光电有限公司 一种移动设备镜头模组
CN107436478A (zh) * 2017-09-14 2017-12-05 浙江舜宇光学有限公司 光学成像镜头
CN108319965A (zh) * 2018-03-28 2018-07-24 江苏珩图智能科技有限公司 一种利用图像获取声音的装置及方法
CN109581626A (zh) * 2018-12-21 2019-04-05 华为技术有限公司 一种镜头及终端设备

Also Published As

Publication number Publication date
CN109581626A (zh) 2019-04-05

Similar Documents

Publication Publication Date Title
US11378784B2 (en) Optical system
WO2020125383A1 (fr) Lentille et dispositif terminal
TWI601994B (zh) 取像用光學鏡頭組、取像裝置及電子裝置
TWI595261B (zh) 攝像用光學鏡頭組、取像裝置及電子裝置
US20180106985A1 (en) Optical image capturing system
TWI484215B (zh) 光學結像鏡片系統、取像裝置及可攜裝置
KR101946261B1 (ko) 촬상 광학계
US10175455B2 (en) Optical image capturing system having four-piece optical lens
KR101649467B1 (ko) 촬영 렌즈 광학계
KR101933422B1 (ko) 촬상 광학계
KR20160068504A (ko) 촬상 광학계
WO2021093542A1 (fr) Lentille optique et dispositif d'imagerie
KR20170011847A (ko) 촬상 광학계 및 서로 다른 화각을 가진 복수의 촬상 광학계가 장착된 모바일 기기
US10031319B2 (en) Optical image capturing system
TWI625546B (zh) 攝像光學鏡片系統、取像裝置及電子裝置
US10502929B2 (en) Optical image capturing system
TWI678572B (zh) 取像鏡頭
US10073244B2 (en) Optical image capturing system
CN110716288B (zh) 光学成像镜头
WO2018192579A1 (fr) Module d'appareil photographique
TWI694276B (zh) 光學鏡頭
TWI725283B (zh) 電子裝置
US20210231920A1 (en) Optical Image Capturing Module
TWI769784B (zh) 成像透鏡組及攝像模組
JP2007065374A (ja) 撮像レンズ及びこれを備えた撮像モジュール

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19898406

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19898406

Country of ref document: EP

Kind code of ref document: A1