CN114911036A - Lens and electronic equipment - Google Patents

Lens and electronic equipment Download PDF

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Publication number
CN114911036A
CN114911036A CN202210551498.5A CN202210551498A CN114911036A CN 114911036 A CN114911036 A CN 114911036A CN 202210551498 A CN202210551498 A CN 202210551498A CN 114911036 A CN114911036 A CN 114911036A
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CN
China
Prior art keywords
lens
phase
diaphragm
lens barrel
distance
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CN202210551498.5A
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Chinese (zh)
Inventor
韦怡
陈嘉伟
王文涛
李响
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN202210551498.5A priority Critical patent/CN114911036A/en
Publication of CN114911036A publication Critical patent/CN114911036A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • 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
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Studio Devices (AREA)
  • Lens Barrels (AREA)

Abstract

The application discloses a lens and an electronic device. The lens comprises a phase surface, a diaphragm, a lens assembly and an image sensor, wherein the diaphragm, the lens assembly and the image sensor are sequentially arranged along the light incidence direction of the lens; the distance between the phase surface and the diaphragm is smaller than a preset distance, and the phase surface is used for modulating light rays incident on the phase surface. Electronic equipment and camera lens in this application modulate light through setting up the phase place to the position of control phase place makes the distance between its and the diaphragm be less than and predetermines the distance, can promote the degree of depth of field of camera lens greatly, thereby reduces the degree of difficulty that electronic equipment realized the micro-function.

Description

Lens and electronic equipment
Technical Field
The present disclosure relates to the field of optical technologies, and more particularly, to a lens barrel and an electronic device.
Background
In recent years, with the development of mobile phone lenses, users desire more and more functions that can be realized by mobile phones. For example, the user wants the mobile phone to realize the microscopic function, i.e. wants the lens of the mobile phone to capture the image at ultra-micro distance. However, since the focus lens of the lens is short, usually several millimeters, the depth of field is shallow, and it is not easy to use the camera in daily life because the camera requires no shaking.
Disclosure of Invention
The embodiment of the application provides a lens and an electronic device.
The lens comprises a phase surface, a diaphragm, a lens assembly and an image sensor, wherein the diaphragm, the lens assembly and the image sensor are sequentially arranged along the light incidence direction of the lens; the distance between the phase surface and the diaphragm is smaller than a preset distance, and the phase surface is used for modulating light rays incident on the phase surface.
The electronic equipment comprises a lens and a shell, wherein the lens is combined with the shell. The lens comprises a phase surface, a diaphragm, a lens assembly and an image sensor, wherein the diaphragm, the lens assembly and the image sensor are sequentially arranged along the light incidence direction of the lens; the distance between the phase surface and the diaphragm is smaller than a preset distance, and the phase surface is used for modulating light rays incident on the phase surface.
Electronic equipment and camera lens in this application modulate light through setting up the phase place to the position of control phase place makes the distance between its and the diaphragm be less than and predetermines the distance, can promote the degree of depth of field of camera lens greatly, thereby reduces the degree of difficulty that electronic equipment realized the micro-function.
Additional aspects and advantages of embodiments of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a lens assembly according to some embodiments of the present disclosure;
FIG. 2 is a schematic view of a conventional lens and images obtained by the lens according to some embodiments of the present application;
FIG. 3 is a schematic diagram of a view angle of a phase plane of a lens in some embodiments of the present application;
FIG. 4 is a schematic diagram of a phase distribution of a cross-section of a phase plane of a lens in some embodiments of the present application;
FIG. 5 is a schematic diagram of a view angle of a phase plane of a lens in some embodiments of the present application;
FIG. 6 is a graph showing the relationship between the depth of field and the MTF value obtained for different distances between the phase plane and the stop;
FIGS. 7 and 8 are schematic views of lens structures according to some embodiments of the present disclosure;
FIG. 9 is a schematic diagram of a stop of a lens barrel according to some embodiments of the present application;
FIG. 10 is a schematic view of a phase plate and stop in some embodiments of the present application;
FIG. 11 is a schematic view of a lens barrel according to some embodiments of the present application;
FIG. 12 is a schematic diagram of an electronic device in some embodiments of the present application.
Detailed Description
Embodiments of the present application will be further described below with reference to the accompanying drawings. The same or similar reference numbers in the drawings identify the same or similar elements or elements having the same or similar functionality throughout.
In addition, the embodiments of the present application described below in conjunction with the accompanying drawings are exemplary and are only for the purpose of explaining the embodiments of the present application, and are not to be construed as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In recent years, with the development of mobile phone lenses, users desire more and more functions that can be realized by mobile phones. For example, the user wants the mobile phone to realize the microscopic function, i.e. wants the lens of the mobile phone to capture the image at ultra-micro distance. However, the current lens of a mobile phone has a short focusing distance, usually several millimeters, so that the depth of field is shallow, and the hand is required to be not shaken during photographing, which is not favorable for daily use.
Referring to fig. 1, a lens 100 is provided in an embodiment of the present disclosure. The lens 100 includes a phase plane 11, a diaphragm 20, a lens assembly 30, and an image sensor 40. Wherein, the diaphragm 20, the lens assembly 30 and the image sensor 40 are sequentially arranged along the light incident direction of the lens 100; the distance between the phase surface 11 and the diaphragm 20 is smaller than a predetermined distance, and the phase surface 11 is used for modulating light incident thereon.
The lens 100 in the present application modulates light by setting the phase surface 11, and controls the position of the phase surface 11, so that the distance between the phase surface and the diaphragm 20 is smaller than the preset distance, which can greatly improve the depth of field of the lens 100, thereby reducing the difficulty of the electronic device 1000 (shown in fig. 12) in realizing the microscopic function.
Referring to fig. 1, the phase plane 11 can modulate the phase of light incident thereon to extend the depth of field of the lens 100. As shown in fig. 2, the first line in fig. 2 is an image obtained by the conventional lens, the middle line in fig. 2 is an image obtained by the lens 100 in the embodiment of the present application, and the last first line in fig. 2 is an image obtained by the lens 100 in the embodiment of the present application after being processed by an algorithm. It can be clearly seen that the conventional lens can obtain a clear image only at a certain distance, while the degree of blur of the image obtained by the lens 100 in the embodiment of the present application is consistent at different distances, and the clear image can be obtained at different distances after subsequent image processing, such as deconvolution algorithm, neural network algorithm, etc. Thus, the depth of field of the lens 100 is increased, and the difficulty of implementing the micro function of the electronic device 1000 (as shown in fig. 12) is reduced.
For example, referring to fig. 3, in some embodiments, the phase profile of the phase plane 11 satisfies z ═ a × x 3 +b*x 2 y+c*xy 2 +d*y 3 Where a, b, c, d denote preset parameters, X denotes a coordinate on the X-axis of the phase plane 11, Y denotes a coordinate on the Y-axis of the phase plane 11, z denotes a phase with coordinates of (X, Y) point, and 0.01<a<0.15、0.01<b<0.15、0.01<c<0.15、0.01<d<0.15, the depth of field of the lens 100 using the phase plane 11 of this design can be improved.
It should be noted that, in some embodiments, the center of the phase plane 11 is taken as a coordinate origin, the first direction is taken as an X axis, the second direction is taken as a Y axis, and the third direction is taken as a Z axis, and the first direction, the second direction and the third direction are all perpendicular to each other. z represents the phase of a point having coordinates (x, y), i.e., the rise of a plane parallel to the z-axis direction. Hereinafter, the X-axis and the Y-axis are also explained and will not be described in detail.
Furthermore, in some embodiments, the values of the preset parameters a, b, c, and d may be the same, for example, a ═ b ═ c ═ d ═ 0.02; alternatively, in some embodiments, the values of the preset parameters a, b, c, and d may not be identical, for example, a ═ d ═ 0.045, c ═ 0.02, and d ═ 0.03; alternatively, in some embodiments, the values of the preset parameters a, b, c, and d may be completely different, for example, a is 0.045, c is 0.02, d is 0.03, and d is 0.04, all of which are not limited herein, and it is only required that the values of the preset parameters a, b, c, and d all satisfy less than 0.15 and greater than 0.01.
For example, referring to fig. 3, in some embodiments, the phase distribution of the phase plane 11 may further satisfy z ═ a × x 3 +b*x 2 y+c*xy 2 +d*y 3 Where a, b, c, d denote preset parameters, X denotes a coordinate on the X-axis of the phase plane 11, Y denotes a coordinate on the Y-axis of the phase plane 11, z denotes a phase with coordinates of (X, Y) point, and 0.01<a＝d<0.15, b-c-0, which can improve the depth of field of the lens 100 using the phase plate 10 of this design.
In some embodiments, the phase plane 11 is a plane type symmetrical about the X-axis and the Y-axis. Illustratively, as shown in fig. 4, fig. 4 is a phase distribution diagram of the first cross section of the phase plane 11 when the preset parameter a and the preset parameter d are equal. Where the Y-axis coordinates of each point in the first cross-section are the same, for example, the first cross-section may be a cross-section obtained by cutting the phase plane 111 along the dotted line shown in fig. 3. The abscissa in fig. 4 represents the coordinate on the X-axis of the phase plane 11, and the ordinate represents the phase of the point, i.e., the rise of the point. It can be seen that, among a plurality of points having the same Y-axis coordinate, if the absolute values of the X-axis coordinates of two points are the same, the absolute values of the rise of the two points are also the same.
For example, referring to fig. 3 and 5, in some embodiments, the phase plane 11 includes a first region 111. The first region 111 is circular and located in the center of the phase plane 11. The first region 111 includes a first sub-region 1111 and a second sub-region 1112 connected to each other, and in a direction from an edge region along a central region of the first region 111, phases of points located in the first sub-region 1111 gradually increase, and phases of points located on the second sub-region 1112 gradually decrease, so that a depth of field of the lens 100 using the phase plane 11 of the design can be improved. For example, assuming that the points a and B are located in the first sub-zone 1111 and the points C and D are located in the second sub-zone 1112, and the point a is closer to the center of the first region 111 than the point B, and the point C is closer to the center of the first region 111 than the point D, the phase at the point a is smaller than the phase at the point B, and the phase at the point C is larger than the phase at the point D.
Further, referring to fig. 5, in some embodiments, the phase plane 11 further includes a second region 112, and the second region 112 surrounds the first region 111. The phase plane 11 further includes a positioning region 113, and the positioning region 113 is located between the first region 111 and the second region 112 and is used for calibrating the position of the first region 111. Specifically, the phase of each point in the positioning area 113 is smaller than the first threshold, the phase of each point in the first area 111 and the second area 112 is larger than the second threshold, and the first threshold is smaller than the second threshold.
In the process of assembling the lens 100, the first region 111 of the phase plane 11 needs to correspond to the center of the image sensor 40. Therefore, in assembling the lens 100, the assembling machine needs to be able to accurately recognize the center of the phase plane 11, that is, the first region 111 of the phase plane 11. In the embodiment, the positioning area 113 is located between the first area 111 and the second area 112, and the phase of each point in the positioning area 113 is smaller than the first threshold, the phase of each point in the first area 111 and the phase of each point in the second area 112 are both larger than the second threshold, and the first threshold is smaller than the second threshold. Thus, the phases of the points in the positioning area 113 between the first area 111 and the second area 112 are all smaller than the phases of the points in the first area 111 and the second area 112, that is, the phases of the positioning area 113 are smaller than the phases of the two sides of the positioning area 113, so that the positioning area 113 can be accurately identified, and the position of the first area 111 can be determined through the positioning area 113. For example, in the process of assembling the lens 100, the assembling machine only needs to recognize that the phase of a certain region is smaller than the phases of the regions on both sides of the certain region, and then determines the region as the positioning region 113, and then determines the first region 111 according to the positioning region 113.
The phase plane 11 may be located on the side of the stop 20 away from the lens assembly 30 (as shown in fig. 1), and the phase plane 11 may also be located on the side of the stop 20 close to the lens assembly 30 (as shown in fig. 11), but the distance between the phase plane 11 and the stop 20 is smaller than the preset distance no matter which side of the stop 20 the phase plane 11 is located.
Referring to fig. 6, (a) to (d) in fig. 6 are graphs of the correspondence between the depth of field and the Modulation Transfer Function (MTF) value obtained when the distance between the phase plane 11 and the stop 20 is different. Wherein, (a) represents a correspondence graph between the depth of field and the MTF value obtained when the distance from the phase plane 11 to the diaphragm 20 is 0.10; (b) a map showing the correspondence between the depth of field and the MTF value obtained when the distance from the phase plane 11 to the diaphragm 20 is 0.07; (c) a map showing the correspondence between the depth of field and the MTF value obtained when the distance from the phase plane 11 to the diaphragm 20 is 0.04; (d) a graph showing the correspondence between the depth of field and the MTF value obtained when the distance from the phase plane 11 to the aperture 20 was 0.01 is shown. (a) In the step (d), the abscissa is the depth of field, the 0 axis is the focal position, the left side and the right side of the 0 axis respectively refer to the front depth of field and the rear depth of field, and the wider the curve extends, the deeper the depth of field is represented; the ordinate is the MTF value, with higher representing sharper, and different curves in the same figure represent values of different fields of view from the center to the periphery in the imaging plane. It can be seen that the smaller the distance between the phase plane 11 and the diaphragm 20, i.e. the closer the phase plane 11 is to the diaphragm 20, the more the curves coincide and the higher the ordinate, the higher and more consistent the sharpness of all fields in the image plane is. Therefore, in this embodiment, the distances between the phase plane 11 and the aperture 20 are controlled to be smaller than the preset distance, so that the phase plane 11 can be close to the aperture 20, thereby further improving the depth of field of the lens 100 and reducing the difficulty of implementing the micro function of the electronic device 1000 (shown in fig. 12).
Specifically, referring to fig. 1, in some embodiments, the lens 100 may further include a phase plate 10, and the phase plane 11 is disposed on one side of the phase plate 10. The phase plate 10 is located on a side of the stop 20 away from the lens assembly 30, that is, after being modulated by the phase surface 11 on the phase plate 10, the light sequentially passes through the stop 20 and the lens assembly 30, and finally enters the image sensor. In some embodiments, as shown in fig. 1, the phase surface 11 is located on a side of the phase plate 10 close to the stop 20, so that compared with the phase surface 11 located on a side of the phase plate 10 far from the stop 20, the distance between the phase surface 11 and the stop 20 can be reduced, which is beneficial to improving the depth of field of the lens 100 and reducing difficulty in implementing a micro function of the electronic device 1000 (shown in fig. 12). Of course, in some embodiments, the phase plate 10 may also be provided with a diaphragm 20 on a side close to the lens assembly 30, that is, the light is incident on the phase plate 10 after passing through the diaphragm 20, which is not limited herein.
Referring to fig. 1 and 7, in some embodiments, the lens 100 further includes a lens barrel 50, and the lens barrel 50 includes a first side 501 and a second side 502 opposite to each other, wherein the first side 501 is farther away from the image sensor 40 than the second side 502. The lens barrel 50 has a receiving cavity 51, and the phase plate 10, the stop 20 and the lens assembly 30 are all received in the receiving cavity 51 of the lens barrel 50, and the phase plate 10, the stop 20 and the lens assembly 30 are received and fixed in the receiving cavity 51 along the first side 501 and the second side 502. At this time, the light can enter the lens barrel 50 from the first side 501 of the lens barrel 50, sequentially pass through the phase plate 10, the stop 20 and the lens assembly 30, then exit from the second side 502 of the lens barrel 50, and enter the image sensor 40. Since the phase plate 10 with the phase surface 11 is accommodated in the lens barrel 50, the phase surface 11 can be closer to the stop 20 accommodated in the lens barrel 50 than the phase plate 10 is arranged outside the lens barrel 50, thereby further improving the depth of field of the lens 100 and reducing the difficulty of implementing a micro function of the electronic device 1000 (shown in fig. 12).
Illustratively, in one example, when the phase plate 10 provided with the phase surface 11 is housed in the lens barrel 50, that is, the phase plate 10 is disposed in the housing cavity 51, the lens 100 has the following parameters: the total optical length (hereinafter referred to as optical TTL) is 3.4mm, the total structural length (hereinafter referred to as structural TTL) is 4.02mm, the optical back focus (hereinafter referred to as back focus FFL) is 0.75mm, the diameter of the phase plate 11 is 2.8mm, the thickness of the phase plate 10 is 0.3mm, and the distance from the phase plate 11 to the stop 20 is 0.01 mm. Wherein, the optical TTL refers to a distance from an object-side surface of one lens farthest from the image sensor 40 in the lens assembly 30 to an imaging plane axis, the structural TTL refers to a distance from an end surface of the lens barrel 50 to the imaging plane axis, and the back focus FFL refers to a distance from one lens farthest from the image sensor 40 in the lens assembly 30 to the imaging plane axis. The optical TTL, the structural TTL, and the back focus TTL mentioned below are also explained and will not be described again.
Referring to fig. 1 and 8, in some embodiments, the phase plate 10 having the phase plane 11 may also be disposed outside the accommodating cavity 51 of the lens barrel 50. Specifically, a side of the lens barrel 50 away from the image sensor 40 is provided with a bearing 52, that is, a first side 501 of the lens barrel 50 is provided with the bearing 52. The phase plate 10 is carried on the carrying portion 52, and the aperture 20 and the lens assembly 30 are both accommodated in the accommodating cavity 51 of the lens barrel 50. At this time, after being modulated by the phase surface 11 of the phase plate 10, the light enters the accommodating cavity 51 of the lens barrel 50, sequentially passes through the stop 20 and the lens assembly 30, then exits from the second side 502 of the lens barrel 50, and enters the image sensor 40.
After the light is modulated by the phase plane 11, the performance of the lens 100 is completely different from the performance of the lens 100 without the phase plane 11, and whether the diaphragm 20, the lens assembly 30, and the image sensor 40 are aligned or not is determined in the process of assembling the lens 100, which greatly increases the difficulty of assembling the lens 100. However, in the present embodiment, since the phase plate 10 provided with the phase surface 11 is carried on the first side 501 of the lens barrel 50, when assembling the lens 100, the stop 20 and the lens assembly 30 may be first installed in the lens barrel 50, then the lens barrel 50 with the stop 20 and the lens assembly 30 installed thereon and the image sensor 40 may be installed, and after the stop 20, the lens assembly 30 and the image sensor 40 are aligned, the phase plate 10 may be installed on the first side 501 of the lens barrel 50. Thus, the assembling difficulty of the lens 100 can be reduced while the quality of the lens 100 is ensured and the depth of field of the lens 100 is improved.
Illustratively, in one example, when the phase plate 10 provided with the phase plane 11 is disposed outside the lens barrel 50, i.e., the phase plate 10 is carried on the first side 501 of the lens barrel 50, the lens 100 has the following parameters: the optical TTL is 3.6mm, the structural TTL is 4.0mm, the back focus FFL is 0.75mm, the diameter of the phase plane 11 is 2.0mm, the thickness of the phase plate 10 is 0.3mm, and the distance from the phase plane 11 to the stop 20 is 0.03 mm.
The diaphragm 20 is a solid body which plays a role in limiting light beams in an optical system, that is, the diaphragm 20 is a solid body in which a circular hole is formed in the middle, and light can pass through the diaphragm 20 from the circular hole. Since the solid body has a certain thickness, in some embodiments, the stop 20 may be further processed to make the phase plane 11 closer to the aperture of the stop 20, so as to further improve the depth of field of the lens 100.
Specifically, referring to fig. 9, in some embodiments, the diaphragm 20 includes a support 21 and a light shielding member 22. The bracket 21 includes a first surface 211 and a second surface 212 opposite to each other, the first surface 211 is closer to the phase plane 11 than the second surface 212, the bracket 21 has a through hole 211, the light shielding member 22 is disposed in the through hole, and the light shielding member 22 has a light through hole 221. The light entering the lens 100 is modulated by the phase plane 11, and then can pass through the light-passing hole 221, and then enter the lens assembly 30. The distance between one side of the light shielding member 22 close to the first surface 211 and the first surface 211 is smaller than the preset distance. In this way, the distance between the phase plane 11 and the light-passing hole 221 through which light can pass can be further shortened while maintaining the position of the stop 20, thereby further improving the depth of field of the lens 100.
For example, as shown in fig. 10 (intentionally exaggerated in fig. 10 for convenience of explanation), the stop 20 in the left side of fig. 10 is an unprocessed stop 20, and the stop 20 in the right side of fig. 10 is an unprocessed stop 20, that is, the distance between the first surface 211 and the side of the light-blocking member 22 of the stop 20 on the right side of fig. 10 close to the first surface 211 is smaller than the preset distance. It can be seen that, in the case where the distance between the side of the phase plate 10 close to the stop 20 and the side of the stop 20 close to the phase plate 10 is the same, that is, when the position of the stop 20 is kept unchanged, the distance m1 between the phase plate 10 and the light-passing hole 221 in the right-hand diagram of fig. 10 is smaller than the distance m2 between the phase plate 10 and the light-passing hole 221 in the left-hand diagram of fig. 10. Therefore, the distance between the side of the light-shielding member 22 close to the first surface 211 and the first surface 211 is smaller than the preset distance, and the distance between the phase surface 11 and the light-passing hole 221 through which light can pass can be further shortened while maintaining the position of the stop 20. The processing on the diaphragm 20 may be to reduce the thickness of the support 21, or may be to directly reduce the distance between the side of the light-shielding member 22 close to the first surface 211 and the first surface 211, and the like, which is not limited herein.
Referring to fig. 11, in some embodiments, the phase plane 11 may also be directly disposed on the lens of the lens assembly 30, so that the phase plate 10 does not need to be disposed in the lens 100, the depth of field of the lens 100 can be extended, the longitudinal distance of the lens 100 can be reduced, and the problems of decentration and inclination of the optical axis of the phase plane 11 and the lens 100 due to assembly tolerance can be reduced.
Specifically, in some embodiments, the lens assembly 30 includes only one lens 31, and the phase plane 11 is disposed on a side of the lens 31 near the stop 20. This makes it possible to reduce the distance between the phase surface 11 and the aperture 20, compared to the distance between the lens 31 and the aperture 20, which is advantageous in increasing the depth of field.
In some embodiments, the lens assembly 30 includes a plurality of lenses 31, and the phase plane 11 is disposed on a side of the first lens adjacent to the stop 20. Wherein, one of the plurality of lenses 31 of the lens assembly 30 closest to the diaphragm 20 is the first lens. This can reduce the distance between the phase plane 11 and the stop 20 compared to other lenses disposed in the lens assembly 30, thereby facilitating an increase in depth of field. Illustratively, as shown in fig. 11, the lens assembly 30 includes four lenses 31, and the four lenses 31 are a lens P1, a lens P2, a lens P3 and a lens P4, respectively. The lens P1 is closer to the stop 20 than the other lenses 31, that is, the lens P1 is the first lens, and the phase plane 11 is disposed on the side of the lens P1 close to the stop 20.
Referring to fig. 1 and 11, in some embodiments, the lens assembly 100 may further include an infrared filter 60, and the infrared filter 60 is located between the lens assembly 30 and the image sensor 40 and is used for filtering infrared rays.
Referring to fig. 12, an electronic device 1000 is further provided in the present embodiment. The electronic device 1000 includes a housing 200 and the lens 100 described in any of the above embodiments, and the lens 100 is combined with the housing 200. The electronic device 1000 may be a mobile phone, a tablet computer, a notebook, an intelligent watch, an intelligent bracelet, or the like, which is not limited herein.
Electronic equipment 1000 in this application modulates the light through set up phase place face 11 in camera lens 100 to control phase place face 11's position, make its distance between 20 with the diaphragm be less than preset distance, can promote the degree of depth of field of camera lens 100 greatly, thereby reduce electronic equipment 1000 and realize the degree of difficulty of micro-function.
In the description herein, reference to the description of the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "a plurality" means at least two, e.g., two, three, unless explicitly specifically defined otherwise.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art within the scope of the present application, which is defined by the claims and their equivalents.

Claims (10)

1. A lens is characterized by comprising a phase surface, a diaphragm, a lens assembly and an image sensor, wherein the diaphragm, the lens assembly and the image sensor are sequentially arranged along the light incidence direction of the lens; the distance between the phase surface and the diaphragm is smaller than a preset distance, and the phase surface is used for modulating light rays incident on the phase surface.
2. The lens barrel according to claim 1, wherein the phase distribution of the phase plane satisfies: z ═ a × x 3 +b*x 2 y+c*xy 2 +d*y 3 Wherein a, b, c, d represent preset parameters, X represents a coordinate on an X-axis of the phase plane, Y represents a coordinate on a Y-axis of the phase plane, z represents a phase with a coordinate of (X, Y) point, and 0.01<a<0.15、0.01<b<0.15、0.01<c<0.15、0.01<d<0.15。
3. The lens barrel according to claim 1, wherein the phase distribution of the phase plane satisfies: z ═ a × x 3 +b*x 2 y+c*xy 2 +d*y 3 Wherein a, b, c, d represent preset parameters, X represents a coordinate on an X-axis of the phase plane, Y represents a coordinate on a Y-axis of the phase plane, z represents a phase with a coordinate of (X, Y) point, and 0.01<a＝d<0.15，b＝c＝0。
4. The lens barrel according to claim 1, wherein the phase plane includes a first region including a first sub-region and a second sub-region which are adjacent; in a direction from the center of the first region to the edge of the first region, the phases of the points located on the first sub-region gradually increase, and the phases of the points located on the second sub-region gradually decrease.
5. The lens barrel according to claim 1, further comprising:
the phase plate is positioned on one side, far away from the lens assembly, of the diaphragm, and the phase surface is arranged on one side, close to the diaphragm, of the phase plate.
6. The lens barrel according to claim 5, further comprising a receiving cavity, wherein the phase plate, the stop and the lens assembly are received in the receiving cavity.
7. The lens barrel according to claim 5, further comprising a lens barrel including first and second opposing sides, the first side being further from an image sensor than the second side; the first side is provided with a bearing part for bearing the phase plate, and the diaphragm and the lens assembly are both contained in a containing cavity of the lens barrel.
8. The lens barrel according to claim 5, wherein the diaphragm includes:
the bracket comprises a first surface and a second surface which are opposite to each other, the first surface is closer to the phase surface than the second surface, and the bracket is provided with a through hole; and
the shading piece is arranged in the through hole, a light through hole is formed in the shading piece, and light modulated by the phase surface passes through the light through hole and then is incident to the lens assembly; the distance between one side of the shading piece close to the first surface and the first surface is smaller than a preset distance.
9. The lens barrel according to claim 1,
the lens component comprises a lens, and the phase surface is arranged on one side of the lens close to the diaphragm; or
The lens component comprises a plurality of lenses, the phase surface is arranged on one side, close to the diaphragm, of the first lens, and one of the lenses, closest to the diaphragm, of the plurality of lenses of the lens component is the first lens.
10. An electronic device, characterized in that the electronic device comprises:
a housing; and
a lens barrel as claimed in any one of claims 1 to 9, incorporated with the housing.
CN202210551498.5A 2022-05-18 2022-05-18 Lens and electronic equipment Pending CN114911036A (en)

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