CN113630536B

CN113630536B - Camera optical assembly and terminal with same

Info

Publication number: CN113630536B
Application number: CN202110917175.9A
Authority: CN
Inventors: 贾喆; 史珺戈
Original assignee: Beijing Youzhuju Network Technology Co Ltd
Current assignee: Beijing Youzhuju Network Technology Co Ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2022-12-27
Anticipated expiration: 2041-08-11
Also published as: CN113630536A

Abstract

The present disclosure provides an optical assembly and have its terminal of making a video recording, and in some embodiments, the optical assembly that makes a video recording matches with the rearmounted camera that the terminal has and uses, includes: a lens having a first main optical axis; the focusing imaging assembly comprises a focusing screen and a focusing lens, and is positioned on the light emitting side of the lens, and the focusing lens is positioned on the side of the focusing screen far away from the lens; the eyepiece is used for being arranged at the light ray incidence side of the rear camera and is provided with a third main optical axis, and the first main optical axis is positioned at the light ray incidence side of the eyepiece; and the light refracting and reflecting assembly can refract the light emitted by the focusing lens by a preset angle and then emit the light to the ocular lens again, and the emitted light of the light refracting and reflecting assembly can be parallel to the third main optical axis. The method further ensures that imaging perspective is free of distortion, even fingers and the like cannot deform, requirements of a perspective distortion correction algorithm on platform computing power, memory and power consumption are further saved, the effect is better, and no delay exists.

Description

Camera optical assembly and terminal with same

Technical Field

The disclosure relates to the technical field of machinery, in particular to a camera optical assembly and a terminal with the same.

Background

The function of taking a video at a low angle is realized in the market, a camera is inclined downwards or a reflector is adopted to reflect the video, book characters or other articles on a desktop are shot, the video is used for other applications such as character recognition, and the video has great perspective distortion, and particularly, for example, the problems that the desktop characters have perspective distortion of large size and small size and the desktop characters or images are small are difficult to avoid; at present, the perspective distortion of the desktop can be corrected by adopting an algorithm, but the algorithm is mainly used for photos, the preview or real-time perspective distortion correction of videos has high calculation power, the videos which cannot be corrected in real time with large resolution ratio cannot be corrected, and the power consumption is also high; moreover, the effect of correcting perspective distortion of objects (such as fingers) with different planes is poor, and certain deformation exists;

the video camera can realize desktop shooting without perspective distortion, and a long support rod is required in the ID (industrial design) appearance if a camera module is arranged right above characters;

by adopting the conventional shift lens module, the difference between the CRA (chip Ray Angle) of the current large-scale mass production camera module sensor and the CRA after the shift is larger, and color crosstalk can occur on the image to influence the effect.

Disclosure of Invention

The present disclosure provides a photographing optical assembly and a terminal having the same.

The present disclosure adopts the following technical solutions.

In some embodiments, the present disclosure provides a camera optical assembly for use with a rear camera of a terminal, comprising:

a lens having a first main optical axis;

the focusing imaging assembly comprises a focusing screen and a focusing lens, the focusing screen is positioned on one side of the lens from which the light rays are emitted, and the focusing lens is positioned on one side of the focusing screen far away from the lens;

the eyepiece is positioned at the light incidence side of the rear camera and is provided with a third main optical axis, and the first main optical axis is positioned at the light emission side of the eyepiece;

the light refraction and reflection assembly can refract the light emitted by the focusing lens to reflect the light to a preset angle and then emit the light to the ocular lens again, and the emitted light of the light refraction and reflection assembly can be parallel to the third main optical axis.

In some embodiments, the disclosure provides a terminal including the above-mentioned image pickup optical assembly, and a lens is located on a side opposite to a side where a rear camera of the terminal is located.

The beneficial effect of the optical assembly that makes a video recording that this disclosed embodiment provided includes: compared with the technical scheme that the focusing screen is not arranged in the prior art, the CRA matching problem required by the lens and the rear camera (namely sensor) is effectively solved, the imaging perspective is ensured to be free of distortion, even fingers and the like cannot deform, the requirements of a perspective distortion correction algorithm on platform computing power, memory and power consumption are saved, the effect is better, and no delay exists; in addition, the redundant structure of the long supporting rod similar to a high-speed shooting instrument is not needed, and the appearance attractiveness is improved.

Drawings

The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements. It should be understood that the drawings are schematic and that elements and elements are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of an image pickup optical assembly according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of another image pickup optical assembly proposed in the embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another image pickup optical assembly according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of another image pickup optical assembly proposed in the embodiment of the present disclosure.

Reference numerals: 1. a lens; 2. a focus imaging assembly; 21. a focusing screen; 22. a focusing lens; 3. a light reflection assembly; 31. a 90-degree light deflection prism; 32. a 60 degree light deflecting prism; 33. a 5-degree light deflection prism; 34. a first 180 DEG ray deflection prism; 35. a second 180 degree light deflecting prism; 4. an eyepiece; 5. a light translation assembly; 100. a terminal; 101. a rear camera; 102. a screen; 200. and supporting the plane.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.

It should be understood that various steps recited in method embodiments of the present disclosure may be performed in parallel and/or in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.

The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "based on" is "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.

It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.

It is noted that references to "a" or "an" in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will recognize that reference to "one or more" unless the context clearly dictates otherwise.

The names of messages or information exchanged between devices in the embodiments of the present disclosure are for illustrative purposes only, and are not intended to limit the scope of the messages or information.

The embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 4 in combination, the present disclosure provides a camera optical assembly, which is used in cooperation with a rear camera 101 provided in a terminal 100, and includes:

a lens 1 having a first main optical axis, which in some embodiments is perpendicular to a support plane 200 (in particular, a table top) on which the terminal 100 is placed and is located on the front side of the screen 102 when the image pickup optical assembly is used, so as to ensure that the image pickup has no perspective distortion;

the focusing imaging component 2 comprises a focusing screen 21 and a focusing lens 22, and is positioned on the light emitting side of the lens 1, and the focusing lens 22 is positioned on the side of the focusing screen 21 far away from the lens 1, wherein the focusing lens 22 can slightly contract a real image light path on the focusing screen 21 so as to ensure that the light path is enough to be reflected inside the subsequent light reflection component 3, so that the size of a related prism is saved, and incomplete imaging caused by light beam divergence and light beam passing is avoided;

the eyepiece 4 is installed on the light incidence side of the rear camera 101, the eyepiece 4 has a third main optical axis, the first main optical axis is located on the light emission side of the eyepiece, and the light emission side of the eyepiece is the side of the eyepiece used for being installed with the rear camera 101;

light refraction and reflection subassembly 3 can with light refraction and reflection that focusing lens 22 jetted out jets out again after predetermineeing the angle eyepiece 4, light refraction and reflection subassembly 3 jet out light can with the third primary optical axis is parallel, through light refraction and reflection subassembly 3 can be with passing through light deflection of focusing lens 22 jets out after predetermineeing the angle, guarantees that formation of image perspective is undistorted.

In the technical scheme, light emitted from the lens 1 forms a real image on a focusing screen 21 in the focusing imaging assembly 2, then is uniformly scattered in all directions, and finally is emitted to the rear camera 101 through a subsequent focusing lens 22, a light reflection assembly 3 and an eyepiece 4, compared with the technical scheme that the focusing screen 21 is not arranged in the prior art, the CRA matching problem required by the lens 1 and the rear camera 101 (also referred to as sensor) is effectively solved, so that the imaging perspective is ensured to be free of distortion, even fingers and the like are not deformed, the requirements of a perspective distortion correction algorithm on platform calculation power, memory and power consumption are saved, the effect is better, and no delay exists; in addition, the redundant structure of the long supporting rod similar to a high-speed shooting instrument is not needed, and the appearance attractiveness is improved.

The focusing screen 21 may specifically be a frosted glass or other perspective imaging screen.

In some embodiments, the focusing lens 22 has a second main optical axis parallel to the first main optical axis and has an offset, and a reasonable selection of the offset can ensure that the lens 1 can be adapted to an object to be photographed, and the object to be photographed on the supporting plane 200 can be clearly imaged on the focusing screen 21, and the object to be photographed, for example, book characters on a desktop, that is, by adopting the aforementioned shift design, can make the range of the desktop as large as possible without changing the transmission distortion, and cannot photograph the screen 102 of the terminal 100. In some cases, the lens 1 may be a wide-angle lens to meet the requirement of wide-range shooting.

In some embodiments, the image pickup optical assembly further includes a light translation assembly 5, the light translation assembly 5 can translate the light emitted from the light reflection assembly 3 by a preset distance and then emit the light to the eyepiece 4, and the light emitted from the light translation assembly 5 is parallel to the third main optical axis, so that image position translation with unchanged imaging range and perspective distortion effect is realized. Specifically, the light translation assembly 5 includes one of a periscope group (as shown in fig. 2), a 45 ° rhombus prism, a 45 ° isosceles trapezoid prism, and a 45 ° parallelogram prism, and in order to achieve a higher degree of integration of the image pickup optical assembly, poor light path propagation caused by assembly tolerance is reduced.

In some embodiments, the focusing lens 22 is a plano-convex mirror, and the plane of the plano-convex mirror is optically bonded to the focusing screen 21, so that the reflection of light between the two opposite planes of the focusing screen 21 and the focusing lens 22 can be reduced, and the loss of light energy and ghost image caused by multiple reflections can be reduced.

In some embodiments, the focusing lens 22 and the eyepiece 4 form a lens system of a fresnel type or a lens system of a Kennel type, which can reduce the specific size of the light reflection assembly 3.

In some embodiments, when the main optical axis of the rear camera 101 of the terminal 100 is parallel to the supporting plane 200, as shown in fig. 1 and fig. 2 in particular, the light reflection assembly 3 includes a 90 ° light deflection prism 31 to reflect the light emitted from the focusing lens 22 by 90 °, and then emit the light, where the 90 ° light deflection prism 31 may be, for example, one of a pentaprism, a roof prism, and a 45 ° prism, so as to ensure the integration degree of the assembly, and of course, when the integration degree of the assembly is not high, the adjustment of the light path deflection angle may also be implemented by reasonably arranging a plurality of reflectors.

In some embodiments, as shown in fig. 2 to 4, the screen 102 of the terminal 100 forms an inclined angle with the support plane 200, which results in an angle between the main optical axis of the rear camera 101 and the support plane 200.

For example, in fig. 2, an included angle of 75 ° is formed between the screen 102 and the supporting plane 200, and at this time, the light refraction and reflection assembly 3 further includes a 60 ° light deflection prism 32, a 45 ° light deflection prism 33, and a second 180 ° light deflection prism 35 in addition to the 90 ° light deflection prism 31, wherein the 60 ° light deflection prism 32 can deflect the light emitted from the 90 ° light deflection prism 31 by 60 ° and emit the light into the 45 ° light deflection prism 33, the 45 ° light deflection prism 33 can deflect the incident light by 45 ° and emit the light into the second 180 ° light deflection prism 35, and the second 180 ° light deflection prism 35 can deflect the incident light by 180 ° and emit the light to the eyepiece 4, so that a real image presented on the focusing screen 21 can be transmitted through without distortion.

For another specific example, an included angle of 60 ° is formed between the screen 102 and the supporting plane 200 in fig. 3 and 4, and at this time, the light reflection and refraction assembly 3 is adapted to include a first 180 ° light deflection prism 34 to reflect the light emitted from the focusing lens 22 by 180 °, and further includes a 60 ° light deflection prism 32 and a second 180 ° light deflection prism 35, wherein the 60 ° light deflection prism 32 can deflect the light emitted from the first 180 ° light deflection prism 34 by 60 ° and then emit the light to the second 180 ° light deflection prism 35, and the second 180 ° light deflection prism 35 can deflect the light emitted from the first 180 ° light deflection prism 34 by 180 ° and then emit the light to the eyepiece 4, so that the real image displayed on the focusing screen 21 can be free of perspective distortion.

The 60 ° light deflecting prism 32 comprises a littrow prism; alternatively, the 45 ° light deflecting prism 33 is a half pentagonal prism; alternatively, the first 180 ° light deflecting prism 34 or the second 180 ° light deflecting prism 35 includes one of a corner cube prism (as shown in fig. 4) or a 45 ° isosceles trapezoid prism (as shown in fig. 3).

In some embodiments, the present disclosure provides a terminal, including the above-mentioned camera optical assembly, specifically, for example, a mobile phone or a tablet computer, and the lens 1 is located on a side of the terminal opposite to the side where the rear camera 101 is located, that is, a front side of the terminal. In order to improve the applicability of the camera optical assembly, the main optical axis of the rear camera 101 and the screen 102 of the terminal can rotate by 15 °, so that the light beam reflection assembly 3 adopting any one of the above can simultaneously adapt to the condition of 60 ° to 75 ° of the inclination angle between the screen 102 and the supporting plane 200.

The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other combinations of features described above or equivalents thereof without departing from the spirit of the disclosure. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.

Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A camera optical assembly for use with a rear camera (101) provided in a terminal (100), comprising:

a lens (1) having a first main optical axis;

the focusing imaging assembly (2) comprises a focusing screen (21) and a focusing lens (22), the focusing screen is positioned on the light emitting side of the lens (1), and the focusing lens (22) is positioned on the side, away from the lens (1), of the focusing screen (21);

the eyepiece (4) is installed on the light incidence side of the rear camera (101) and is provided with a third main optical axis, and the first main optical axis is positioned on the light emission side of the eyepiece;

the light refraction and reflection assembly (3) can refract the light emitted by the focusing lens (22) to reflect the preset angle and then emit the light to the ocular lens (4), and the emitted light of the light refraction and reflection assembly (3) can be parallel to the third main optical axis.

2. Camera optical assembly according to claim 1,

the focusing lens (22) has a second main optical axis parallel to and offset from the first main optical axis; and/or, still include light translation subassembly (5), light translation subassembly (5) can with light translation that light reflection of book subassembly (3) jetted out jets out to after predetermineeing the distance eyepiece (4), just the light that jets out in light translation subassembly (5) with the third chief optical axis is parallel.

3. Camera optical assembly according to claim 2,

the light translation assembly (5) comprises one of a periscope group, a 45-degree rhombic prism, a 45-degree isosceles trapezoid prism and a 45-degree parallelogram prism.

4. Image pickup optical assembly according to claim 1,

the focusing lens (22) is a plano-convex lens, and the plane of the plano-convex lens and the focusing screen (21) are optically glued into a whole; and/or the focusing lens (22) and the eyepiece (4) form a Ralstem eyepiece system or a Kennel eyepiece system.

5. Camera optical assembly according to claim 1,

the light beam refracting and reflecting component (3) comprises a 90-degree light beam deflecting prism (31) so as to refract the light beam emitted by the focusing lens (22) by 90 degrees and then emit the light beam.

6. Camera optical assembly according to claim 5,

the light beam catadioptric assembly (3) further comprises a 60-degree light beam deflection prism (32), a 45-degree light beam deflection prism (33) and a second 180-degree light beam deflection prism (35), wherein the 60-degree light beam deflection prism (32) can deflect the light beams emitted by the 90-degree light beam deflection prism (31) by 60 degrees and then emit the light beams into the 45-degree light beam deflection prism (33), the 45-degree light beam deflection prism (33) can deflect the incident light beams by 45 degrees and then emit the light beams into the second 180-degree light beam deflection prism (35), and the second 180-degree light beam deflection prism (35) can deflect the incident light beams by 180 degrees and then emit the light beams into the eyepiece (4).

7. Camera optical assembly according to claim 1,

the light beam refracting and reflecting component (3) comprises a first 180-degree light beam deflecting prism (34) for refracting and reflecting the light beam emitted by the focusing lens (22) by 180 degrees and then emitting the light beam.

8. Camera optical assembly according to claim 7,

the light beam refraction and reflection assembly (3) further comprises a 60-degree light beam deflection prism (32) and a second 180-degree light beam deflection prism (35), wherein the 60-degree light beam deflection prism (32) can deflect the light beam emitted by the first 180-degree light beam deflection prism (34) by 60 degrees and then emit the light beam to the second 180-degree light beam deflection prism (35), and the second 180-degree light beam deflection prism (35) can deflect the incident light beam by 180 degrees and then emit the light beam to the eyepiece (4).

9. A terminal, characterized in that it comprises a camera optical assembly according to any one of claims 1 to 8, the lens (1) being located on the side opposite to the side on which the rear camera (101) of the terminal is located.

10. A terminal according to claim 9, characterized in that the main optical axis of the rear camera (101) is rotatable 15 ° to the screen (102) the terminal has.