View field angle adjustable zoom light-cutting lamp lens and light-cutting lamp
By designing a movable first lens group and a coupled second and third lens groups for the cutting light lens, the problem of reduced clarity caused by the fixed projection distance of the cutting light is solved, and stepless adjustment of the projection distance and field of view angle is achieved, which adapts to multi-scene applications and improves the sharpness of the light spot and the uniformity of illumination.
Patent Information
- Application Number
- CN202423167189.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The projection distance of existing cut-off lights is fixed and cannot be adjusted, resulting in reduced illumination clarity when the installation position deviates, and it cannot adapt to applications in multiple scenarios and with multiple requirements.
A zoom light-cutting lamp lens with adjustable field of view is designed. It includes a movable first lens group and a second and third lens groups that can be coupled and linked. By adjusting the focal length and field of view, the projection distance and spot size can be adjusted steplessly, thereby increasing the projection distance and improving the projection quality.
It realizes stepless adjustment of projection clarity and field of view, expands the applicable scenarios of the cut-light lamp, adapts to longer-distance projection and various needs, and improves the sharpness of the light spot and the uniformity of illumination.
Smart Images
Figure CN223484063U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of lighting technology, and in particular to a zoom cut-off lamp lens and a cut-off lamp with an adjustable field of view. Background Technology
[0002] The main functions of a cut-off light include projecting a geometrically shaped light spot with a sharp edge, projecting logos and patterns, and using it as a accent lighting fixture. Cut-off lights use a special optical structure to control the shape of the light spot, achieving a precise cut-off effect, and are commonly used in high-end commercial lighting venues such as museums and galleries.
[0003] Currently, the projection distance of cut-off lights is relatively short and must remain constant. When the installation position deviates due to factors such as lamp installation, causing a change in the projection distance, the illumination clarity will decrease. Therefore, it is particularly important to improve the design of cut-off lights to adapt to various scenarios and needs, such as longer projection distances, zoom capabilities, and adjustable field of view. Utility Model Content
[0004] In view of this, the present application provides a zoom cut-off lens and a cut-off lamp with an adjustable field of view to solve at least one problem existing in the background art.
[0005] In a first aspect, embodiments of this application provide a zoom cut-off lens with an adjustable field of view, the cut-off lens comprising a first lens group, a second lens group, a third lens group, and a fourth single lens arranged sequentially along the beam propagation direction;
[0006] The first lens group is configured to move along the optical axis to steplessly adjust the focal length of the light cutter lens; the second lens group and the third lens group are respectively configured to be coupled and linked along the optical axis to steplessly adjust the field of view of the light cutter lens.
[0007] The first lens group has at least two single lenses to form positive optical power and to make the projection distance of the cut-off lamp lens within a preset long distance range.
[0008] In conjunction with the first aspect, in an alternative embodiment, the field of view ranges from 20° to 35°.
[0009] In conjunction with the first aspect, in an optional implementation, the preset long distance range is 2m to 3m.
[0010] In conjunction with the first aspect, in an alternative embodiment, the first lens group has at least one of the following:
[0011] The first lens group includes a first cemented lens group; the first cemented lens group includes an eleventh single lens and a twelfth single lens arranged sequentially along the beam propagation direction; the incident surface of the eleventh single lens is a plane; the emitting surface of the eleventh single lens and the incident surface of the twelfth single lens are the cementing surfaces of the first cemented lens group; for the eleventh single lens, the cementing surface is concave; the emitting surface of the twelfth single lens is convex.
[0012] The first lens group satisfies at least one of the following: (D11+D12) / L1 is between 0.05 and 0.15; d1 / L1 is between 0.01 and 0.15; where D11 represents the thickness of the eleventh single lens, D12 represents the thickness of the twelfth single lens, d1 represents the air gap between the first lens group and the incident aperture; and L1 represents the total length of the lens.
[0013] In conjunction with the first aspect, in an alternative embodiment, the second lens group has at least one of the following:
[0014] The second lens group has negative optical power and includes a twenty-first single lens, a twenty-second single lens and a twenty-third single lens arranged sequentially along the beam propagation direction; the light-incident surface of the twenty-first single lens is concave and the light-exit surface is planar; the light-incident surface of the twenty-second single lens is concave and the light-exit surface is convex; the light-incident surface of the twenty-third single lens is convex and the light-exit surface is convex.
[0015] The second lens group satisfies the following conditions: L2 / L1 is between 0.12 and 0.23, and (D21+D22+D23) / L2 is between 0.9 and 1; where D21 represents the thickness of the twenty-first single lens, D22 represents the thickness of the twenty-second single lens, D23 represents the thickness of the twenty-third single lens, L2 represents the total length of the second lens group, and L1 represents the total length of the lens.
[0016] In conjunction with the first aspect, in an alternative embodiment, the third lens group has at least one of the following:
[0017] The third lens group has negative optical power and includes a second cemented lens group; the second cemented lens group includes a thirty-first single lens and a thirty-second single lens arranged sequentially along the beam propagation direction; the incident surface of the thirty-first single lens is concave; the exit surface of the thirty-first single lens and the incident surface of the thirty-second single lens are the cementing surfaces of the second cemented lens group; for the thirty-first single lens, the cementing surface is convex; the exit surface of the thirty-second single lens is concave.
[0018] The third lens group satisfies the following condition: (D31+D32) / L1 is between 0.02 and 0.12; where D31 represents the thickness of the thirty-first single lens, D32 represents the thickness of the thirty-second single lens, and L1 represents the total length of the lens.
[0019] In conjunction with the first aspect, in an optional embodiment, the fourth single lens satisfies: D40 / L1 is between 0.01 and 0.06; where D40 represents the thickness of the fourth single lens and L1 represents the total length of the lens;
[0020] And / or, the light cutter lens further includes at least one of the following: an incident aperture; a projection sheet; wherein the incident aperture is configured to confine the light beam emitted by the light source within the aperture opening of the incident aperture and then transmit it to the first lens group; the projection sheet is configured to convert the light beam emitted by the light source into a light beam having a preset pattern on the projection sheet and then output it to the first lens group.
[0021] In conjunction with the first aspect, in an optional embodiment, the field of view of the cut-off lens is configured to be adjustable within the range of a first field of view to a second field of view;
[0022] Under the first field of view, the cut-off lens satisfies: d21∶d31∶d41 is between 5∶14∶1 and 6∶11∶1; where d21 represents the air gap between the first lens group and the second lens group under the first field of view, d31 represents the air gap between the second lens group and the third lens group under the first field of view, and d41 represents the air gap between the third lens group and the fourth single lens under the first field of view;
[0023] In the case of the second field of view, the cut-off lens satisfies: d22∶d32∶d42 is between 2∶1∶4 and 4∶1∶2; where d22 represents the air gap between the first lens group and the second lens group in the second field of view, d32 represents the air gap between the second lens group and the third lens group in the second field of view, and d42 represents the air gap between the third lens group and the fourth single lens in the second field of view.
[0024] In conjunction with the first aspect, in an optional embodiment, the air gap between the first lens group and the incident aperture is between 5 mm and 9 mm;
[0025] The thickness of the eleventh single lens in the first lens group is between 1.78 mm and 1.82 mm;
[0026] The thickness of the twelfth single lens in the first lens group is between 10.48 mm and 10.52 mm;
[0027] The air gap between the first lens group and the second lens group is between 24.8 mm and 15.4 mm;
[0028] The thickness of the twenty-first single lens in the second lens group is between 8.58 mm and 8.62 mm;
[0029] The thickness of the twenty-second single lens in the second lens group is between 5.98 mm and 6.02 mm;
[0030] The thickness of the twenty-third single lens in the second lens group is between 4.98 mm and 5.02 mm;
[0031] The air gap between the second lens group and the third lens group is between 7.5 mm and 38.4 mm;
[0032] The thickness of the thirty-first single lens in the third lens group is between 6.48 mm and 6.52 mm;
[0033] The thickness of the thirty-second single lens in the third lens group is between 1.98 mm and 2.02 mm;
[0034] The air gap between the third lens group and the fourth single lens ranges from 2.6 mm to 23.6 mm;
[0035] And / or, the air gap between the first lens group and the incident aperture is 7 mm;
[0036] The thickness of the eleventh single lens in the first lens group is 1.8 mm;
[0037] The thickness of the twelfth single lens in the first lens group is 10.5 mm;
[0038] At the first field of view, the air gap between the first lens group and the second lens group is 15 mm; at the second field of view, the air gap between the first lens group and the second lens group is 25.2 mm.
[0039] The thickness of the twenty-first single lens in the second lens group is 8.6 mm;
[0040] The thickness of the twenty-second single lens in the second lens group is 6mm;
[0041] The thickness of the twenty-third single lens in the second lens group is 5mm;
[0042] At the first field of view, the air gap between the second lens group and the third lens group is 38 mm; at the second field of view, the air gap between the second lens group and the third lens group is 7.9 mm.
[0043] The thickness of the thirty-first single lens in the third lens group is 6.5 mm;
[0044] The thickness of the thirty-second single lens in the third lens group is 2mm;
[0045] At the first field of view, the air gap between the third lens group and the fourth single lens is 3 mm; at the second field of view, the air gap between the third lens group and the fourth single lens is 23.2 mm.
[0046] In a second aspect, embodiments of this application provide a beam cutter lamp, including a light source, a condenser lens group, and a zoom beam cutter lamp lens with an adjustable field of view as described in the first aspect.
[0047] The focusing lens group is configured to focus the light beam emitted by the light source and output it to the cutter lens.
[0048] The beneficial effects of the technical solution provided in this application include: a movable first lens group with at least two single lenses achieves stepless adjustment of projection sharpness and increases projection distance; the second and third lens groups, coupled along the optical axis, enable stepless adjustment of the field of view and adjustable spot size, further increasing projection distance; and a fourth single lens provides compensation, improving projection quality. Therefore, this application embodiment can adapt to various scenarios and needs, such as long-distance projection, zoom, and adjustable field of view, expanding its applicability.
[0049] Additional aspects and advantages of the embodiments of this 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 the embodiments of this application. Attached Figure Description
[0050] The drawings herein are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by reference to specific embodiments. In the drawings:
[0051] Figure 1 This is a schematic diagram illustrating a specific example of a zoom cut-off lens with adjustable field of view in an embodiment of this application.
[0052] Figure 2This is a schematic diagram illustrating a specific example of a zoom cut-off lens with adjustable field of view in the embodiments of this application under another field of view.
[0053] Figure 3 This is a schematic diagram of the lens layout of a specific example of a zoom cut-off lens with adjustable field of view in an embodiment of this application.
[0054] Figure 4 This is a schematic diagram of a specific example of a light cutter lamp in the embodiments of this application. Detailed Implementation
[0055] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.
[0056] The embodiments described in this application are not exhaustive, but merely illustrative of some embodiments, and are not intended to limit the scope of protection of this application. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined with each other. For example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.
[0057] In each embodiment of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.
[0058] The terminology used in the embodiments of this application is for the purpose of describing specific embodiments only and is not intended to limit the scope of this application.
[0059] In the embodiments of this application, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun after the article can be understood as either a singular expression or a plural expression.
[0060] In the embodiments of this application, "multiple" refers to two or more.
[0061] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.
[0062] The prefixes "first," "second," etc., used in the embodiments of this application are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, value, or content of the descriptive objects. The description of the descriptive objects is based on the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, the numerical value of the descriptive object is not limited by ordinal numbers and can be one or more. Taking "first device" as an example, the numerical value of "device" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the descriptive object is "device," then "first device" and "second device" can be the same device or different devices, and their types can be the same or different.
[0063] This application provides a zoom cut-off lens with an adjustable field of view. Figure 1 This diagram illustrates a specific example of a zoom cut-off lens with an adjustable field of view in an embodiment of this application, showing a structural schematic of its field of view. Figure 2 This diagram illustrates a specific example of a zoom cut-off lens with an adjustable field of view in an embodiment of this application, showing another specific example at a different field of view.
[0064] refer to Figure 1 and Figure 2 The adjustable field-of-view zoom cutter lens includes a first lens group 10, a second lens group 20, a third lens group 30 and a fourth single lens 40 arranged sequentially along the beam propagation direction.
[0065] The first lens group 10 is configured to move along the optical axis OA to steplessly adjust the focal length of the light cutter lens; the second lens group 20 and the third lens group 30 are respectively configured to be coupled and linked along the optical axis OA to steplessly adjust the field of view of the light cutter lens.
[0066] The first lens group 10 has at least two single lenses to form positive optical power and to make the projection distance of the cut-off lamp lens within a preset long distance range.
[0067] In this embodiment, a single lens or lens group with positive optical power can converge the light beam. Conversely, a single lens or lens group with negative optical power can diverge the light beam. The first lens group 10 with positive optical power converts the divergent light beam emitted from the light source into a convergent beam that illuminates the incident surface of the second lens group 20. Furthermore, moving the first lens group 10 allows for fine-tuning of the focal length, ensuring clear illumination or projection at various projection distances. This also ensures that the projection distance of the cut-off lens remains within a preset long-distance range, i.e., compared to the current shorter projection distance, the projection distance can be increased. This can be achieved, for example, by minimizing the angle at which the light converges after passing through the first lens group 10, but is not limited to this.
[0068] In this embodiment of the application, the preset long distance range can be 2m to 3m, for example 2.5m.
[0069] In an exemplary embodiment, the second lens group 20 may have negative optical power, the third lens group 30 may have negative optical power, and the fourth single lens 40 may have positive optical power, but is not limited thereto. Thus, the second lens group 20 and the third lens group 30 can increase the projection distance, further ensuring that the projection distance of the cut-off lens is within a preset long-distance range; and through the coupling and linkage of the second lens group 20 and the third lens group 30, i.e., through the synchronous movement of the second lens group 20 and the third lens group 30 along the optical axis OA, the field of view can be steplessly adjusted, for example, the field of view range can reach 20° to 35°. The fourth single lens 40 can achieve a compensation function to correct the edge sharpness, distortion, and uniformity of illumination of the light spot, thereby improving the projection quality. Finally, the fourth single lens 40 can convert the light beam into outgoing light with a certain projection angle. The emitted light consists of multiple sets of parallel beams emitted from multiple angles, which can project uniformly and obtain light spots with various shapes and patterns, uniform illuminance distribution, sharp edges and small distortion. Furthermore, the size of the light spot can be adjusted by adjusting the field of view.
[0070] In one example, the second lens group 20 and the third lens group 30 can be coupled and linked along the optical axis OA to adjust to the desired target field of view; then the first lens group 10 can be moved along the optical axis OA to adjust or fine-tune the focal length (sharpness) so that the projection is clear.
[0071] In another example, the first lens group 10 can be adjusted to move along the optical axis OA to make the projection clear. That is, if the projection is clear after the first lens group 10 is finely adjusted, then the projection distance is kept unchanged, and the second lens group 20 and the third lens group 30 are adjusted to couple and move along the optical axis OA. The field of view changes and the target field of view is achieved, while the clarity remains unchanged. There is no need to adjust the first lens group 10 again.
[0072] Thus, this embodiment of the application achieves stepless adjustment of projection sharpness and increases projection distance through a movable first lens group with at least two single lenses of positive optical power; and through the second and third lens groups, which can be coupled and linked along the optical axis, it achieves stepless adjustment of the field of view and adjustable spot size, further increasing the projection distance; and through the fourth single lens, it can realize a compensation function, improving projection quality. Therefore, this embodiment of the application can adapt to multiple scenarios and needs such as long-distance projection, zoom, and adjustable field of view, expanding the applicable scenarios.
[0073] In an optional embodiment, the first lens group 10 includes a first cemented lens group; the first cemented lens group includes an eleventh single lens 11 and a twelfth single lens 12 arranged sequentially along the beam propagation direction;
[0074] And / or, the light-incident surface of the eleventh single lens 11 is a plane; the light-exiting surface of the eleventh single lens 11 and the light-incident surface of the twelfth single lens 12 are the cementing surfaces of the first cemented lens group; for the eleventh single lens 11, the cementing surface is a concave surface; the light-exiting surface of the twelfth single lens 12 is a convex surface.
[0075] In this embodiment of the application, the cemented surface of the twelfth single lens 12 is convex.
[0076] The surface of a single lens or lens group can be convex, concave, or flat. For example, a convex surface can be a lens surface that bulges outward from the lens; a concave surface can be a lens surface that is recessed into the lens.
[0077] By configuring the first lens group 10, which includes an eleventh single lens 11 with a flat incident light surface and a twelfth single lens 12 with a convex exit light surface, a converged beam is achieved.
[0078] In an optional embodiment, the multi-field-of-view cut-off lens satisfies the following condition: d1 / L1 is between 0.01 and 0.15; where d1 represents the air gap between the first lens group 10 and the incident aperture LS, and L1 represents the total length of the lens;
[0079] And / or, the first lens group 10 satisfies: (D11+D12) / L1 is between 0.05 and 0.15; where D11 represents the thickness of the eleventh single lens 11, D12 represents the thickness of the twelfth single lens 12, and L1 represents the total length of the lens.
[0080] Figure 3 A schematic diagram of the lens layout is shown as a specific example of a zoom cut-off lens with an adjustable field of view, according to an embodiment of this application. (See reference...) Figure 1 , Figure 2 and Figure 3The total length L1 of the lens can be the distance between the incident stop LS and the vertex of the exit surface of the fourth single lens 40 on the optical axis OA. The air gap d1 between the first lens group 10 and the incident stop LS can be the distance between the incident surface plane of the first lens group 10 and the incident stop LS on the optical axis OA. The thickness D11 of the eleventh single lens 11 can be the distance between the incident surface plane of the eleventh single lens 11 and the vertex of the concave surface of the exit surface on the optical axis OA. The thickness D12 of the twelfth single lens 12 can be the distance between the vertex of the convex surface of the incident surface and the vertex of the convex surface of the exit surface of the twelfth single lens 12 on the optical axis OA.
[0081] In an optional embodiment, the second lens group 20 includes a twenty-first single lens 21, a twenty-second single lens 22, and a twenty-third single lens 23 arranged sequentially along the beam propagation direction;
[0082] And / or, the light-incident surface of the 21st single lens 21 is concave and the light-outcident surface is planar; the light-incident surface of the 22nd single lens 22 is concave and the light-outcident surface is convex; the light-incident surface of the 23rd single lens 23 is convex and the light-outcident surface is convex.
[0083] In an optional embodiment, the second lens group 20 satisfies the following: L2 / L1 is between 0.12 and 0.23, and (D21+D22+D23) / L2 is between 0.9 and 1; wherein, D21 represents the thickness of the twenty-first single lens 21, D22 represents the thickness of the twenty-second single lens 22, D23 represents the thickness of the twenty-third single lens 23, L2 represents the total length of the second lens group 20, and L1 represents the total length of the lens.
[0084] In this embodiment, the total length L2 of the second lens group 20 can be the distance between the vertex of the concave incident surface of the twenty-first single lens 21 and the vertex of the convex exit surface of the twenty-third single lens 23 on the optical axis OA. The thickness D21 of the twenty-first single lens 21 can be the distance between the vertex of the concave incident surface of the twenty-first single lens 21 and the plane of the exit surface. The thickness D22 of the twenty-second single lens 22 can be the distance between the vertex of the concave incident surface of the twenty-second single lens 22 and the vertex of the convex exit surface of the twenty-third single lens 23. The thickness D23 of the twenty-third single lens 23 can be the distance between the vertex of the convex incident surface of the twenty-third single lens 23 and the vertex of the convex exit surface of the twenty-third single lens 23.
[0085] In an optional embodiment, the third lens group 30 includes a second cemented lens group; the second cemented lens group includes a thirty-first single lens 31 and a thirty-second single lens 32 arranged sequentially along the beam propagation direction;
[0086] And / or, the light-incident surface of the thirty-first single lens 31 is concave; the light-exiting surface of the thirty-first single lens 31 and the light-incident surface of the thirty-second single lens 32 are the cementing surfaces of the second cemented lens group; for the thirty-first single lens 31, the cementing surface is convex; and the light-exiting surface of the thirty-second single lens 32 is concave.
[0087] In this embodiment of the application, the cemented surface of the thirty-second single lens 32 is concave.
[0088] The third lens group 30 adopts a cemented lens group, which improves the stability of the lens structure during the switching of the field of view and improves the stability of the illumination quality of the cut-off light.
[0089] In an optional embodiment, the third lens group 30 satisfies: (D31+D32) / L1 is between 0.02 and 0.12; where D31 represents the thickness of the thirty-first single lens 31, D32 represents the thickness of the thirty-second single lens 32, and L1 represents the total length of the lens.
[0090] In an optional embodiment, the fourth single lens satisfies the following condition: D40 / L1 is between 0.01 and 0.06; where D40 represents the thickness of the fourth single lens 40 and L1 represents the total length of the lens.
[0091] In this embodiment, the thickness D31 of the thirty-first single lens 31 can be the distance between the vertex of the concave incident surface and the vertex of the convex exit surface of the thirty-first single lens 31 on the optical axis OA. The thickness D32 of the thirty-second single lens 32 can be the distance between the vertex of the concave incident surface and the vertex of the concave exit surface of the thirty-second single lens 32 on the optical axis OA. The thickness D40 of the fourth single lens 40 can be the distance between the vertex of the convex incident surface and the plane of the exit surface of the fourth single lens 40 on the optical axis OA.
[0092] By configuring the shapes of the eleventh single lens 11 and the twelfth single lens 12 in the first lens group 10, the twenty-first single lens 21, the twenty-second single lens 22 and the twenty-third single lens 23 in the second lens group 20, the thirty-first single lens 31 and the thirty-second single lens 32 in the third lens group 30, and the shape of the light-incident surface and the light-outcident surface of the fourth single lens 40, it is possible to achieve multiple sets of parallel beams emitted from multiple angles and uniform projection.
[0093] In an optional embodiment, the light cutter lens further includes at least one of the following: an incident aperture LS; a projection sheet; wherein the incident aperture LS is configured to confine the light beam emitted by the light source within the aperture opening of the incident aperture and then transmit it to the first lens group 10; the projection sheet is configured to convert the light beam emitted by the light source into a light beam having a preset pattern on the projection sheet and then output it to the first lens group 10.
[0094] In this embodiment, the diameter of the incident aperture LS can be 20.5 mm, but it is not limited to this. The slide (or film) can have various projection patterns. When illuminated by light, these patterns can be projected onto surfaces such as screens, walls, and handicrafts, thereby displaying light spots of various projection patterns.
[0095] In an exemplary embodiment, the projector can be placed above or below the incident aperture LS, or in other positions, depending on actual needs. An aperture can also be provided between at least one of the following: between the first lens group 10 and the second lens group 20, between the second lens group 20 and the third lens group 30, and between the third lens group 30 and the fourth single lens 40.
[0096] In an exemplary embodiment, the incident aperture LS can also be used in conjunction with a beam cutter group to switch between obtaining light spots of various shapes. For example, the light spots of various shapes may include at least one of circles, ellipses, squares, rectangles, triangles, trapezoids, and other polygons, which can illuminate a planned area to highlight, enhance, or emphasize it.
[0097] In one alternative embodiment, the field of view of the cut-off lens is configured to be adjustable within the range of a first field of view to a second field of view;
[0098] Under the first field of view, the cut-off lens satisfies: d21∶d31∶d41 is between 5∶14∶1 and 6∶11∶1; where d21 represents the air gap between the first lens group 10 and the second lens group 20 under the first field of view, d31 represents the air gap between the second lens group 20 and the third lens group 30 under the first field of view, and d41 represents the air gap between the third lens group 30 and the fourth single lens 40 under the first field of view;
[0099] In the case of the second field of view, the cut-off lens satisfies: d22∶d32∶d42 is between 2∶1∶4 and 4∶1∶2; where d22 represents the air gap between the first lens group 10 and the second lens group 20 in the second field of view, d32 represents the air gap between the second lens group 20 and the third lens group 30 in the second field of view, and d42 represents the air gap between the third lens group 30 and the fourth single lens 40 in the second field of view.
[0100] refer to Figure 1 and Figure 2 , Figure 1 The optical path is shown in the case of a first field of view (e.g., 35°), in which the second lens group 20 and the third lens group 30 have a first type of moving position. Figure 2The diagram illustrates the optical path under a second field of view (e.g., 20°), where the second lens group 20 and the third lens group 30 have a second type of moving position. The second lens group 20 and the third lens group 30 are then coupled and linked between the first and second moving positions, achieving beam zoom.
[0101] In an alternative embodiment, the air gap d1 between the first lens group 10 and the incident aperture LS is between 5 mm and 9 mm;
[0102] The thickness D11 of the eleventh single lens 11 in the first lens group is between 1.78 mm and 1.82 mm;
[0103] The thickness D12 of the twelfth single lens 12 in the first lens group is between 10.48 mm and 10.52 mm;
[0104] The air gap between the first lens group 10 and the second lens group 20 is between 24.8 mm and 15.4 mm;
[0105] The thickness D21 of the twenty-first single lens 21 in the second lens group is between 8.58 mm and 8.62 mm;
[0106] The thickness D22 of the twenty-second single lens 22 in the second lens group is between 5.98 mm and 6.02 mm;
[0107] The thickness D23 of the twenty-third single lens 23 in the second lens group is between 4.98 mm and 5.02 mm;
[0108] The air gap between the second lens group 20 and the third lens group 30 is between 7.5 mm and 38.4 mm;
[0109] The thickness D31 of the thirty-first single lens 31 in the third lens group is between 6.48 mm and 6.52 mm;
[0110] The thickness D32 of the thirty-second single lens 32 in the third lens group is between 1.98 mm and 2.02 mm;
[0111] The air gap between the third lens group 30 and the fourth single lens 40 ranges from 2.6 mm to 23.6 mm.
[0112] Below are lens parameters for a specific example of a cut-off lens, as shown in Tables 1, 2, and 3.
[0113] Table 1
[0114]
[0115] Table 2
[0116] First field of view (35°) d21(mm) 15 d31(mm) 38 d41(mm) 3
[0117] Table 3
[0118] Second field of view (20°) d22(mm) 25.2 d32(mm) 7.9 d42(mm) 23.2
[0119] In an exemplary embodiment, the total length L1 of the lens is 108.1 mm.
[0120] Thus, the cut-off lamp lens of this application embodiment can achieve sharp and virtually distortion-free light spot edges and highly uniform illuminance distribution across all viewing angles. Furthermore, the cut-off lamp lens of this application embodiment can improve the uniformity of the emitted light spot, with edge illuminance exceeding 85% of center illuminance, and ensuring that the center and edge images are equally clear during projection, thereby improving the illumination quality of the cut-off lamp.
[0121] This application also provides a light-cutting lamp. Figure 4 A schematic diagram of a specific example of a beam cutter lamp in an embodiment of this application is shown. As shown, the beam cutter lamp includes a light source, a focusing lens group, and the aforementioned zoomable beam cutter lamp lens with adjustable field of view, arranged sequentially along the beam propagation direction.
[0122] The focusing lens group is configured to focus the light beam emitted by the light source and output it to the cutter lens.
[0123] In this embodiment, the light source can be a point light source array, such as an LED array. The cut-off lamp can project light of a uniform color or project an image. The condenser lens group can be configured according to actual needs. The light emitted by the light source, after passing through the condenser lens group, illuminates the incident aperture of the cut-off lamp lens, and then exits from the cut-off lamp lens for projection. This enables long-distance projection, zoom, and adjustable field of view, improving applicability. Furthermore, the cut-off lamp's light spot has sharp edges and low distortion, resulting in good illumination uniformity.
[0124] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.
Claims
1. A zoom cut-off lens with adjustable field of view, characterized in that, The beam cutter lens includes a first lens group, a second lens group, a third lens group, and a fourth single lens arranged sequentially along the beam propagation direction; The first lens group is configured to move along the optical axis to steplessly adjust the focal length of the cut-off lamp lens; The second lens group and the third lens group are respectively configured to be coupled and linked along the optical axis to steplessly adjust the field of view of the cut-off lamp lens; The first lens group has at least two single lenses to form positive optical power and to make the projection distance of the cut-off lamp lens within a preset long distance range.
2. The zoom cut-off lens with adjustable field of view according to claim 1, characterized in that, The field of view ranges from 20° to 35°.
3. The zoom cut-off lens with adjustable field of view according to claim 1, characterized in that, The preset long distance range is 2m to 3m.
4. The zoom cut-off lens with adjustable field of view according to claim 1, characterized in that, The first lens group has at least one of the following: The first lens group includes a first cemented lens group; the first cemented lens group includes an eleventh single lens and a twelfth single lens arranged sequentially along the beam propagation direction; the incident surface of the eleventh single lens is a plane; the emitting surface of the eleventh single lens and the incident surface of the twelfth single lens are the cementing surfaces of the first cemented lens group; for the eleventh single lens, the cementing surface is concave; the emitting surface of the twelfth single lens is convex. The first lens group satisfies at least one of the following: (D11+D12) / L1 is between 0.05 and 0.15; d1 / L1 is between 0.01 and 0.15; where D11 represents the thickness of the eleventh single lens, D12 represents the thickness of the twelfth single lens, d1 represents the air gap between the first lens group and the incident aperture; and L1 represents the total length of the lens.
5. The zoom cut-off lens with adjustable field of view according to claim 1, characterized in that, The second lens group has at least one of the following: The second lens group has negative optical power and includes a twenty-first single lens, a twenty-second single lens and a twenty-third single lens arranged sequentially along the beam propagation direction; the light-incident surface of the twenty-first single lens is concave and the light-exit surface is planar; the light-incident surface of the twenty-second single lens is concave and the light-exit surface is convex; the light-incident surface of the twenty-third single lens is convex and the light-exit surface is convex. The second lens group satisfies the following conditions: L2 / L1 is between 0.12 and 0.23, and (D21+D22+D23) / L2 is between 0.9 and 1; where D21 represents the thickness of the twenty-first single lens, D22 represents the thickness of the twenty-second single lens, D23 represents the thickness of the twenty-third single lens, L2 represents the total length of the second lens group, and L1 represents the total length of the lens.
6. The zoom cut-off lens with adjustable field of view according to claim 1, characterized in that, The third lens group has at least one of the following: The third lens group has negative optical power and includes a second cemented lens group; the second cemented lens group includes a thirty-first single lens and a thirty-second single lens arranged sequentially along the beam propagation direction; the incident surface of the thirty-first single lens is concave. The light-emitting surface of the thirty-first single lens and the light-receiving surface of the thirty-second single lens are the cementing surfaces of the second cemented lens group; for the thirty-first single lens, the cementing surface is a convex surface; the light-emitting surface of the thirty-second single lens is a concave surface. The third lens group satisfies the following condition: (D31+D32) / L1 is between 0.02 and 0.12; where D31 represents the thickness of the thirty-first single lens, D32 represents the thickness of the thirty-second single lens, and L1 represents the total length of the lens.
7. The zoom cut-off lens with adjustable field of view according to claim 1, characterized in that, The fourth single lens satisfies the following condition: D40 / L1 is between 0.01 and 0.06; where D40 represents the thickness of the fourth single lens and L1 represents the total length of the lens. And / or, the light cutter lens further includes at least one of the following: an incident aperture; a projection sheet; wherein the incident aperture is configured to confine the light beam emitted by the light source within the aperture opening of the incident aperture and then transmit it to the first lens group; the projection sheet is configured to convert the light beam emitted by the light source into a light beam having a preset pattern on the projection sheet and then output it to the first lens group.
8. The zoom cut-off lens with adjustable field of view according to claim 1, characterized in that, The field of view of the cut-off lens is configured to be adjustable within the range of a first field of view to a second field of view; Under the first field of view, the cut-off lens satisfies: d21∶d31∶d41 is between 5∶14∶1 and 6∶11∶1; where d21 represents the air gap between the first lens group and the second lens group under the first field of view, d31 represents the air gap between the second lens group and the third lens group under the first field of view, and d41 represents the air gap between the third lens group and the fourth single lens under the first field of view; In the case of the second field of view, the cut-off lens satisfies: d22∶d32∶d42 is between 2∶1∶4 and 4∶1∶2; where d22 represents the air gap between the first lens group and the second lens group in the second field of view, d32 represents the air gap between the second lens group and the third lens group in the second field of view, and d42 represents the air gap between the third lens group and the fourth single lens in the second field of view.
9. The zoom cut-off lens with adjustable field of view according to any one of claims 1-8, characterized in that, The air gap between the first lens group and the incident aperture is between 5 mm and 9 mm; The thickness of the eleventh single lens in the first lens group is between 1.78 mm and 1.82 mm; The thickness of the twelfth single lens in the first lens group is between 10.48 mm and 10.52 mm; The air gap between the first lens group and the second lens group is between 24.8 mm and 15.4 mm; The thickness of the twenty-first single lens in the second lens group is between 8.58 mm and 8.62 mm; The thickness of the twenty-second single lens in the second lens group is between 5.98 mm and 6.02 mm; The thickness of the twenty-third single lens in the second lens group is between 4.98 mm and 5.02 mm; The air gap between the second lens group and the third lens group is between 7.5 mm and 38.4 mm; The thickness of the thirty-first single lens in the third lens group is between 6.48 mm and 6.52 mm; The thickness of the thirty-second single lens in the third lens group is between 1.98 mm and 2.02 mm; The air gap between the third lens group and the fourth single lens ranges from 2.6 mm to 23.6 mm; And / or, the air gap between the first lens group and the incident aperture is 7 mm; The thickness of the eleventh single lens in the first lens group is 1.8 mm; The thickness of the twelfth single lens in the first lens group is 10.5 mm; At the first field of view, the air gap between the first lens group and the second lens group is 15 mm; at the second field of view, the air gap between the first lens group and the second lens group is 25.2 mm. The thickness of the twenty-first single lens in the second lens group is 8.6 mm; The thickness of the twenty-second single lens in the second lens group is 6mm; The thickness of the twenty-third single lens in the second lens group is 5mm; At the first field of view, the air gap between the second lens group and the third lens group is 38 mm; at the second field of view, the air gap between the second lens group and the third lens group is 7.9 mm. The thickness of the thirty-first single lens in the third lens group is 6.5 mm; The thickness of the thirty-second single lens in the third lens group is 2mm; At the first field of view, the air gap between the third lens group and the fourth single lens is 3 mm; at the second field of view, the air gap between the third lens group and the fourth single lens is 23.2 mm.
10. A light-cutting lamp, characterized in that, It includes a light source arranged sequentially along the beam propagation direction, a condenser lens group, and a zoom cut-off lens with an adjustable field of view as described in any one of claims 1-9; The focusing lens group is configured to focus the light beam emitted by the light source and output it to the cutter lens.