A zoom lens with controllable rotation effect and an imaging device
By designing the curvature center of the lens group and the position of the aperture group, and adjusting the aperture, the problem of uncontrollable lens rotation effects was solved, achieving precise control and stable application of rotation effects, and enhancing the artistic expression of photographic creation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGRAO XINZHOU DISTRICT SHUNTONG OPTICAL INSTR FACTORY
- Filing Date
- 2025-08-22
- Publication Date
- 2026-05-29
AI Technical Summary
The uncontrollable rotation effect of existing lenses limits their stable application in photographic creation and the realization of their artistic value.
By designing the relative position of the curvature center of the lens group and the aperture group, and combining this with the adjustment of the aperture stop, precise control of the rotation effect can be achieved, including adjusting the distance between the front lens group and the image plane to change the distortion intensity and position.
It achieves controllability of rotation effects, enhances the flexibility and artistic expression of photographic creation, and ensures stable application of image quality and special effects.
Smart Images
Figure CN224303933U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical lens technology, and more specifically to a lens and imaging device with controllable rotation effect. Background Technology
[0002] In the history of optical lens development, one or two medium telephoto lenses appeared in the 20th century that produced a unique rotational effect on a band of scenery outside the central area during imaging. Given the technological understanding of the time, this phenomenon was generally considered a flaw left over from the overly simple optical design of the lens, and not an intentionally designed feature. With the development of photographic art and the improvement of aesthetic demands, contemporary photographers have gradually discovered that this rotational effect, once defined as a "flaw," can endow photographic works with unique artistic expression, producing visual impact and emotional communication effects that conventional lenses cannot achieve, becoming a highly valuable creative element. The rotational effect produced by early lenses was essentially an unintended result of optical structural defects, not a function actively implemented based on design intent. Because its formation mechanism was not subject to human control, key parameters such as the location, intensity, and range of the rotational effect could not be precisely controlled according to creative needs, greatly limiting the stable application of this effect in photographic creation and the full realization of its artistic value. Utility Model Content
[0003] The purpose of this invention is to overcome the defects of the prior art and provide a lens and imaging device with controllable rotation effect, so as to solve the technical problem of uncontrollable rotation effect of existing lenses.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] In a first aspect, this utility model provides a lens with controllable rotation effect, comprising: a front lens group, an aperture group, and a rear lens group arranged sequentially from the object side to the image plane; the rear lens group includes two first lenses, which are cemented together or have a gap; the distance between the front lens group and the image plane is adjustable.
[0006] In one embodiment, two of the first lenses are cemented together to form a first surface, a cemented surface, and a second surface that are sequentially distributed from the aperture group toward the image plane; at least one of the curvature centers of the first surface, the cemented surface, and the second surface is disposed away from the aperture group.
[0007] In one embodiment, the center of curvature of the first surface and the glued surface is located on the side of the first surface away from the aperture group, and the center of curvature of the second surface is located on the side of the second surface closer to the aperture group.
[0008] In one embodiment, the two first lenses are separated by a gap to form a third surface, a fourth surface, a fifth surface, and a sixth surface that are distributed sequentially from the aperture group toward the image plane; at least one of the curvature centers of the third surface, the fourth surface, the fifth surface, and the sixth surface is disposed away from the aperture group.
[0009] In one embodiment, the center of curvature of the third surface is located on the side of the third surface away from the aperture group, the center of curvature of the fourth surface is located on the side of the fourth surface close to the aperture group, the center of curvature of the fifth surface is located on the side of the fifth surface close to the aperture group, and the center of curvature of the sixth surface is located on the side of the sixth surface close to the aperture group.
[0010] In one embodiment, the aperture group includes an aperture stop, which is used to adjust the size of the imaging beam and thus affect the image effect.
[0011] In one embodiment, when the field of view of the lens is wide-angle, a positive lens is provided between the aperture stop and the front lens group.
[0012] In one embodiment, the front lens group includes two or three second lenses.
[0013] In one embodiment, the distance between the surface of the second lens near the aperture stop and the aperture stop is adjustable; or, the distance between the surface of the positive lens and the aperture stop is adjustable.
[0014] Secondly, this utility model provides an imaging device, which includes the aforementioned lens with controllable rotation effect.
[0015] The advantages of this invention compared to the prior art are as follows: This invention changes the refraction angle of light by using two glued or separated first lenses to produce tangential distortion, thereby generating a rotation effect. Furthermore, by adjusting the distance between the front lens group and the image plane, the intensity and position of the distortion are adjusted, thereby changing the intensity and position of the rotation effect. The synergistic effect transforms the formation mechanism of the rotation effect from a passive defect to a controllable optical design, which helps to precisely adjust the rotation effect according to the needs of photographic creation, realizing the stable application of special effects in photographic creation and the full realization of its artistic value.
[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and understandable, the following are preferred embodiments, which are described in detail below. Attached Figure Description
[0017] Figure 1A schematic diagram of the preferred lens with controllable rotation effect provided by this utility model;
[0018] Figure 2 A schematic diagram of the structure of another preferred lens with controllable rotation effect provided by this utility model;
[0019] Figure 3 A schematic diagram of the structure of another preferred lens with controllable rotation effect provided by this utility model;
[0020] Figure 4 A schematic diagram of the structure of another preferred lens with controllable rotation effect provided by this utility model.
[0021] Figure label:
[0022] 1. Front lens group; 11. Second lens; 111. Seventh surface; 112. Eighth surface; 113. Ninth surface; 114. Tenth surface; 2. Aperture group; 21. Aperture stop; 22. Positive lens; 221. Eleventh surface; 222. Twelfth surface; 3. Rear lens group; 31. First lens; 311. First surface; 312. Cemented surface; 313. Second surface; 314. Third surface; 315. Fourth surface; 316. Fifth surface; 317. Sixth surface; 4. Image plane. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0024] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.
[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.
[0026] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0027] Example 1
[0028] See Figure 1-4 As shown, this embodiment discloses a lens with controllable rotation effect, which includes: a front lens group 1, an aperture group 2 and a rear lens group 3 distributed sequentially from the object side to the image plane 4; the rear lens group 3 includes two first lenses 31, the two first lenses 31 are glued together or have a gap; the distance between the front lens group 1 and the image plane 4 is adjustable.
[0029] The rotating effect controllable lens of this embodiment changes the deflection angle of light by two cemented or separated first lenses 31 to produce tangential distortion, thereby generating a rotating effect. Furthermore, the intensity and position of the distortion are adjusted by adjusting the distance between the front lens group 1 and the image plane 4, thereby changing the intensity and position of the rotating effect. The synergistic effect transforms the formation mechanism of the rotating effect from a passive defect to a controllable optical design, which helps to precisely adjust the rotating effect according to the needs of photographic creation, realizing the stable application of special effects in photographic creation and the full play of artistic value.
[0030] In a preferred embodiment, two first lenses 31 are cemented together to form a first surface 311, a cemented surface 312, and a second surface 313, which are sequentially distributed from the aperture group 2 toward the image plane 4. At least one of the curvature centers of the first surface 311, the cemented surface 312, and the second surface 313 is disposed away from the aperture group 2. The presence of a surface away from the aperture group 2 in the cemented two first lenses 31 forces light to be deflected outward to actively induce tangential distortion, that is, to cause asymmetrical offset when light is incident obliquely, resulting in scene distortion, and thus producing a rotational effect with swirl as the core. It is understood that the first surface 311 is the object side of the first lens 31 near the aperture group 2, that is, the side close to the object; the second surface 313 is the image side of the first lens 31 near the image plane 4, that is, the side close to the image plane 4; the bonding surface 312 is the side where the two first lenses 31 are bonded together; the center of curvature refers to the geometric center of the sphere to which the lens surface belongs. In this embodiment, the lens with the center of curvature away from the aperture group 2 is configured to expand the incident angle of the edge light rays and enhance the swirling intensity.
[0031] In a further embodiment, the curvature centers of the first surface 311 and the cemented surface 312 are located on the side of the first surface 311 away from the aperture group 2, and the curvature center of the second surface 313 is located on the side of the second surface 313 closer to the aperture group 2. By constraining the diffusion range of the spin distortion through the surface orientation combination, the center resolution attenuation can be prevented, and the image quality can be maintained. Specifically, the curvature centers of the first surface 311 and the cemented surface 312 under the two first lenses 31 cemented together are away from the aperture, forcing the light rays to deflect outward and generate tangential distortion. The second surface 313, which is the surface closest to the image plane 4, is centripetally set to converge the center light rays to compensate for field curvature, limiting the rotation effect to a ring-shaped area at the edge of the image, thus achieving the special effect of normal center image and edge rotation.
[0032] In another preferred embodiment, the two first lenses 31 have a gap, forming a third surface 314, a fourth surface 315, a fifth surface 316, and a sixth surface 317 distributed sequentially from the aperture group 2 toward the image plane 4; at least one of the curvature centers of the third surface 314, the fourth surface 315, the fifth surface 316, and the sixth surface 317 is positioned away from the aperture group 2. It is understood that the third surface 314 is the object-side surface of the first lens 31 near the aperture group 2, the fourth surface 315 is the image-side surface of the first lens 31 near the aperture group 2, the fifth surface 316 is the object-side surface of the first lens 31 near the image plane 4, and the sixth surface 317 is the image-side surface of the first lens 31 near the image plane 4. The presence of a surface away from the aperture in the two separated first lenses 31 forces light to deflect outwards, actively inducing tangential distortion, that is, causing asymmetrical offset when light is incident obliquely, resulting in scene distortion, and thus producing a rotational effect centered on swirl.
[0033] In a further embodiment, the center of curvature of the third surface 314 is located on the side of the third surface 314 away from the aperture group 2, the center of curvature of the fourth surface 315 is located on the side of the fourth surface 315 close to the aperture group 2, the center of curvature of the fifth surface 316 is located on the side of the fifth surface 316 close to the aperture group 2, and the center of curvature of the sixth surface 317 is located on the side of the sixth surface 317 close to the aperture group 2. The third surface 314 is positioned away from the aperture to dominate the generation of vortexes, while the fourth to sixth surfaces are positioned centripetally, i.e., their centers of curvature are away from the aperture group 2. This is used to suppress central coma, maintain the purity of vortexes, compress distortion diffusion, and achieve an outward shift of the vortex position.
[0034] In a further embodiment, the aperture group 2 includes an aperture stop 21, which is used to adjust the size of the imaging beam and thus affect the image quality. The aperture stop 21 directly controls the sharpness of the swirling bokeh boundary by mechanically contracting or enlarging, such as by changing the aperture. For example, mechanical contraction reduces the beam diameter and increases the incident angle at the edge of the light, thereby increasing the visibility of the swirling bokeh in low-light environments.
[0035] In a further embodiment, when the lens has a wide field of view, a positive lens 22 is provided between the aperture stop 21 and the front lens group 1. It is understood that a wide-angle lens is typically a lens with a field of view fov ≥ 60°. The addition of the positive lens 22 is used to pre-converge edge rays, eliminate abrupt changes in wide-angle astigmatism distortion, maintain the continuity of the astigmatism ring, and improve the stability of the special effects.
[0036] In a further embodiment, the front lens group 1 includes two or three second lenses 11. The number of lenses in the front lens group 1 affects the light refraction amplitude. Two or three second lenses 11 can achieve weak adjustment and strong modulation of light refraction, which can optimize the initial refraction state of the incident light. The design of multiple second lenses 11 increases the refractive interface and provides a more flexible optical path adjustment space. Combined with the adjustment of the distance between the front lens group 1 and the image plane 4, it can more accurately change the intensity, bandwidth and position of the astigmatism effect, and enhance the fineness of control. The astigmatism bandwidth refers to the width of the band-shaped area in the image plane 4 that presents the rotation effect.
[0037] In a further embodiment, the distance between the surface of the second lens 11 closest to the aperture stop 21 and the aperture stop 21 is adjustable; or, the distance between the surface of the positive lens 22 and the aperture stop 21 is adjustable. It is understood that increasing or decreasing the distance between the aperture stop 21 and the object side of the lens surface closest to the aperture stop 21 can change the swirl intensity, bandwidth, and position. Adjusting the distance between the surface of the second lens 11, which is close to the aperture stop 21, and the aperture stop 21 can change the relative positional relationship between the front group of optical paths and the aperture stop 21, thereby adjusting the angle and range of the incident beam entering the aperture stop 21 to affect the rotation effect generated by the rear group. In wide-angle situations, the lens closest to the aperture stop 21 between the aperture stop 21 and the object side is the positive lens 22. The distance between the front lens group 1 and the positive lens 22 remains unchanged. The distance between the positive lens 22 and the aperture stop 21 can also be adjusted, which changes the distance between the first lens and the aperture stop 21, thus adjusting the rotation effect. Furthermore, adjusting the distance between the positive lens 22 and the aperture stop 21 can optimize the beam convergence point and ensure the stability of the rotation effect in wide-angle scenes.
[0038] It is understood that the structure for adjusting the distance between the first lens 31 or the positive lens 22 and the aperture stop 21 in this embodiment, i.e., adjusting the distance between the front lens group 1 and the image plane 4, is not limited, including but not limited to: the selection and fixed setting of this distance during lens production, and the adjustment made by manual knob or motor drive during use.
[0039] See Figure 1 , Figure 1 This is a schematic diagram of a preferred embodiment of the lens with controllable rotation effect in this embodiment. The field of view of the lens in this embodiment is fov84°, and its specific parameters are as follows:
[0040]
[0041]
[0042] Where fov84° is the wide-angle, in this embodiment, a positive lens 22 is provided in front of the aperture stop 21; the seventh surface 111 and the eighth surface 112 are the object-side and image-side surfaces of the second lens 11 near the object side, respectively; the ninth surface 113 and the tenth surface 114 are the object-side and image-side surfaces of the second lens 11 near the aperture group 2, respectively; and the eleventh surface 221 and the twelfth surface 222 are the object-side and image-side surfaces of the positive lens 22, respectively. It can be understood that a radius of curvature R > 0 means the center of curvature is away from the aperture group 2, and a radius of curvature R < 0 means the center of curvature of the lens surface is located on the side of the lens near the aperture group 2. In this embodiment, changing the interval between the tenth surface 114 and the eleventh surface 221, i.e., the interval 0.51* in the table above, changes the distance between the front lens group 1 and the image plane 4, thereby altering the rotational effects such as astigmatism intensity and position.
[0043] See Figure 2 , Figure 2 This is a schematic diagram of a preferred embodiment of the lens with controllable rotation effect in this embodiment. The field of view of the lens in this embodiment is fov64°, and its specific parameters are as follows:
[0044]
[0045] Where fov64° is the wide-angle, in this embodiment, a positive lens 22 is provided in front of the aperture stop 21; the seventh surface 111 and the eighth surface 112 are the object-side and image-side surfaces of the second lens 11 near the object side, respectively; the ninth surface 113 and the tenth surface 114 are the object-side and image-side surfaces of the second lens 11 near the aperture group 2, respectively; and the eleventh surface 221 and the twelfth surface 222 are the object-side and image-side surfaces of the positive lens 22, respectively. It can be understood that a radius of curvature R > 0 means the center of curvature is away from the aperture group 2, and a radius of curvature R < 0 means the center of curvature of the lens surface is located on the side of the lens near the aperture group 2. In this embodiment, changing the interval between the twelfth surface 222 and the aperture stop 21, i.e., the interval 0.38* in the table above, changes the distance between the front lens group 1 and the image plane 4, thereby altering the rotational effects such as astigmatism intensity and position.
[0046] See Figure 3 , Figure 3 This is a schematic diagram of a preferred embodiment of the lens with controllable rotation effect in this embodiment. The field of view of the lens in this embodiment is 48.6°, and its specific parameters are as follows:
[0047]
[0048] In this embodiment, the seventh surface 111 and the eighth surface 112 are the object-side and image-side surfaces of the second lens 11, which are closer to the object side, respectively. The ninth surface 113 and the tenth surface 114 are the object-side and image-side surfaces of the second lens 11, which are closer to the aperture group 2, respectively. It can be understood that a radius of curvature R > 0 means the center of curvature is located away from the aperture group 2, and a radius of curvature R < 0 means the center of curvature of the lens surface is located on the side of the lens closer to the aperture group 2. In this embodiment, changing the distance between the tenth surface 114 and the aperture stop 21 (i.e., the distance 0.29* in the table above) changes the distance between the front lens group 1 and the image plane 4, thereby altering the rotational effects such as astigmatism intensity and position.
[0049] See Figure 4 , Figure 4 This is a schematic diagram of a preferred embodiment of the lens with controllable rotation effect in this embodiment. The field of view of the lens in this embodiment is fov30°, and its specific parameters are as follows:
[0050]
[0051] In this embodiment, the seventh surface 111 is the object-side surface of the second lens 11 near the object side, the eighth surface 112 is the surface where the two second lenses 11 are glued together, and the ninth surface 113 is the image-side surface of the second lens 11 near the aperture group 2. It can be understood that a radius of curvature R > 0 means the center of curvature is away from the aperture group 2, and a radius of curvature R < 0 means the center of curvature of the lens surface is located on the side of the lens near the aperture group 2. In this embodiment, changing the distance between the ninth surface 113 and the aperture stop 21 (i.e., the distance 0.16* in the table above) changes the distance between the front lens group 1 and the image plane 4, thereby altering the rotational effects such as astigmatism intensity and position.
[0052] Example 2
[0053] See Figure 1-4 As shown, this embodiment discloses an imaging device, which includes the rotation-controllable lens of Embodiment 1. It is understood that the imaging device includes, but is not limited to, a camera and a photographic system; the imaging device includes an imaging element for converting light signals collected by the rotation-controllable lens into electrical signals.
[0054] The imaging device of this embodiment, by integrating the lens with controllable rotation effect from Embodiment 1, directly inherits its controllable rotation effect function, expanding the creative application scenarios of the imaging device, such as artistic photography and special effects videos, and significantly improving the user appeal and market competitiveness of the imaging device.
[0055] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.
Claims
1. A lens with controllable rotation effect, characterized in that, include: The front lens group, the aperture group, and the rear lens group are distributed sequentially from the object plane to the image plane; the rear lens group includes two first lenses, which are either cemented together or have a gap; the distance between the front lens group and the image plane is adjustable.
2. The lens with controllable rotation effect according to claim 1, characterized in that, The two first lenses are bonded together to form a first surface, a bonded surface, and a second surface that are sequentially distributed from the aperture group toward the image plane; at least one of the curvature centers of the first surface, the bonded surface, and the second surface is disposed away from the aperture group.
3. The lens with controllable rotation effect according to claim 2, characterized in that, The center of curvature of the first surface and the glued surface is located on the side of the first surface away from the aperture group, and the center of curvature of the second surface is located on the side of the second surface closer to the aperture group.
4. The lens with controllable rotation effect according to claim 1, characterized in that, The two first lenses have a gap, forming a third surface, a fourth surface, a fifth surface, and a sixth surface that are distributed sequentially from the aperture group toward the image plane; at least one of the curvature centers of the third surface, the fourth surface, the fifth surface, and the sixth surface is disposed away from the aperture group.
5. The lens with controllable rotation effect according to claim 4, characterized in that, The center of curvature of the third surface is located on the side of the third surface away from the aperture group, the center of curvature of the fourth surface is located on the side of the fourth surface close to the aperture group, the center of curvature of the fifth surface is located on the side of the fifth surface close to the aperture group, and the center of curvature of the sixth surface is located on the side of the sixth surface close to the aperture group.
6. The lens with controllable rotation effect according to claim 1, characterized in that, The aperture group includes an aperture stop, which is used to adjust the size of the imaging beam and thus affect the image effect.
7. The lens with controllable rotation effect according to claim 6, characterized in that, When the field of view of the lens is wide-angle, a positive lens is provided between the aperture stop and the front lens group.
8. The lens with controllable rotation effect according to claim 7, characterized in that, The front lens group includes two or three second lenses.
9. The lens with controllable rotation effect according to claim 8, characterized in that, The distance between the surface of the second lens near the aperture stop and the aperture stop is adjustable; or, the distance between the surface of the positive lens and the aperture stop is adjustable.
10. An imaging device, characterized in that, Including the lens with controllable rotation effect as described in any one of claims 1-9.