Lens device for projection lamp and projection lamp
By designing a lens device for a projection lamp, the lens body structure with the inner concave and outer convex curved surfaces is used to solve the beam dispersion and stray light problems caused by the unstable quality of the existing projection lamp, achieving a more efficient lighting effect and reducing production costs.
Patent Information
- Application Number
- CN202421962206.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The quality of existing projector lenses is unstable, resulting in problems such as beam dispersion, uneven brightness distribution, macular effect and stray light, increasing manufacturing costs and production complexity.
A lens device for a projector is designed, including a lens plate and a lens body. The light inlet surface of the lens body is a concave curved surface and the light outward surface is a convex curved surface. Light enters the lens body from the light inlet surface and emits from the middle of the light outward surface. The output range of light is limited by the curve design, and the beam dispersion and stray light are reduced.
It effectively reduces beam dispersion, uneven brightness distribution and light scattering, alleviates or eliminates problems such as aperture ghosting, macular effects, lamp bead images and stray light, improves lighting effects, and reduces processing and production costs.
Smart Images
Figure CN223036253U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of floodlights, in particular to a lens device for a floodlight and a floodlight. Background Art
[0002] As a professional lighting tool, a floodlight can concentrate light to illuminate a specific area and is widely used in stadiums, building contour lighting, overpass decoration, and various outdoor activity venues. A floodlight usually includes a light source and a lens. The light source emits light, and the lens restricts the angle of the light. There are some deficiencies in the lenses of floodlights on the market at present. First of all, the quality of most lenses on the market varies. This is mainly because there are various uncertainties in the manufacturing process, including raw material quality, processing accuracy, and process control, etc. This directly leads to a significant decline in the lighting effect after the light source passes through such lenses. Specifically, it is manifested as beam dispersion, forming disturbing aperture ghosts, uneven brightness distribution, the appearance of yellow spot effects, and unclear images of lamp beads, etc., seriously interfering with the expected lighting quality and visual experience. In addition, due to the minute flaws on the surface of the glass lens or the non-ideal state of the internal structure, light will scatter unexpectedly when passing through the lens, generating stray light. The industry generally adopts the method of frosting the lens surface in an attempt to weaken the influence of stray light. However, this additional step not only increases the complexity of the manufacturing process, prolongs the production cycle, but also directly raises the production cost of the glass lens, making manufacturers face the pressure of low production efficiency and cost control. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to provide a lens device for a floodlight, which can improve the lighting effect and reduce the processing cost.
[0004] To solve the above technical problem, the utility model provides a lens device for a floodlight. The floodlight includes a light source component. The lens device for the floodlight includes a lens plate and a lens body arranged on the lens plate. The position of the lens body corresponds to the position of the light source component.
[0005] An incident light surface and an emergent light surface are respectively arranged on the inner side and the outer side of the lens body. The incident light surface is an inner concave curved surface, and the emergent light surface is an outer convex curved surface. The light emitted by the light source component can enter the lens body from the incident light surface and be emitted from the middle of the emergent light surface.
[0006] As an improvement to the above solution, the longitudinal section of the light incident surface includes a first curve. A first light incident portion is provided in the middle of the light incident surface. The first light incident portion is formed by rotating the first curve around the central axis of the light incident surface. The light exit surface includes a first light exit portion. The first light exit portion is provided in the middle of the light exit surface. Part of the light emitted by the light source component can enter the lens body from the first light incident portion and exit from the first light exit portion.
[0007] As an improvement to the above solution, the angle formed by the light falling within the first light incident portion and the central axis is between 0° and 65°.
[0008] As an improvement to the above solution, the longitudinal section of the light incident surface includes a second curve. The second curve is connected to the side of the first curve away from the central axis. A second light incident portion is connected to the side of the first light incident portion away from the central axis. The second light incident portion is formed by rotating the second curve around the central axis. The light exit surface includes a second light exit portion. The second light exit portion is provided on the side of the first light exit portion away from the central axis. Part of the light emitted by the light source component can enter the lens body from the second light incident portion and exit from the second light exit portion and the lens plate.
[0009] As an improvement to the above solution, the angle formed by the light falling within the second light incident portion and the central axis is between 60° and 88°.
[0010] As an improvement to the above solution, the longitudinal section of the light incident surface includes a third curve. The third curve is connected to the side of the second curve away from the central axis. A third light incident portion is connected to the side of the second light incident portion away from the central axis. The third light incident portion is formed by rotating the third curve around the central axis. Part of the light emitted by the light source component can enter the lens body from the third light incident portion and exit from the lens plate.
[0011] As an improvement to the above solution, the angle formed by the light falling within the third light incident portion and the central axis is between 85° and 90°.
[0012] As an improvement to the above solution, the longitudinal section of the light exit surface includes a light exit curve. The first light exit portion and the second light exit portion are formed by rotating the light exit curve around the central axis.
[0013] As an improvement to the above solution, the number of the lens bodies is multiple, and the multiple lens bodies are arranged on the lens plate in an interleaved manner.
[0014] The present utility model further provides a floodlight, including the lens device for floodlight as described above.
[0015] Implementing the present utility model has the following beneficial effects:
[0016] The lens device for a floodlight of the present utility model is provided with a lens plate and a lens body. The light source component of the floodlight is arranged on the side of the light incident surface inside the lens body. The light incident surface inside the lens body is a concave curved surface, and the light emitting surface outside the lens body is a convex curved surface. The light emitted by the light source component can enter the lens body from the light incident surface and exit from the middle of the light emitting surface, so that the emission range of most of the light can be limited to the middle of the light emitting surface, greatly reducing the phenomena of light beam dispersion, uneven brightness distribution and light scattering, alleviating or eliminating the problems of aperture ghosting, yellow spot effect, lamp bead image and stray light, thereby improving the lighting effect. Moreover, in this process, there is no need to process the surface of the lens body, which can reduce the processing and production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic structural diagram of the lens device for a floodlight of the present invention from a first perspective;
[0018] Figure 2 is a schematic structural diagram of the lens device for a floodlight of the present invention from a second perspective;
[0019] Figure 3 is a schematic diagram of the light path where light enters the first light incident part and exits from the first light emitting part;
[0020] Figure 4 is a schematic diagram of the light path where light enters the second light incident part and exits from the second light emitting part and the lens plate;
[0021] Figure 5 is a schematic diagram of the light path where light enters the third light incident part and exits from the lens plate;
[0022] Figure 6 is a color diagram of the light path and the synthesized spot diagram after light enters each light incident part;
[0023] Figure 7 is Figure 6 the grayscale diagram of;
[0024] Figure 8 is a color diagram of the overall synthesized spot diagram;
[0025] Figure 9 is Figure 8 the grayscale diagram of;
[0026] Figure 10 is the light distribution curve diagram of the lens device for a floodlight of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the orientation terms such as up, down, left, right, front, back, inside and outside that appear or will appear in the text of the present utility model are only based on the drawings of the present utility model and do not specifically limit the present utility model.
[0028] See Figure 1 , Figure 2 and Figure 3 , an embodiment of the present utility model discloses a lens device for a floodlight, including a lens plate 1 and a lens body 2 provided on the lens plate 1. The lens plate 1 is fixed inside the floodlight, and the floodlight includes a light source member 10. The number of the light source members 10 is multiple, and the number of the light source members 10 corresponds to the number of the lens bodies 2. The position of the lens body 2 corresponds to the position of the light source member 10. The light emitted by the light source member 10 is first refracted into the lens body 2 and then refracted out of the lens body 2 to form floodlight.
[0029] The internal structure of most of the existing glass lenses on the market has poor light constraint. After the light enters the glass lens, it is easy to produce more scattering towards the side edges of the glass lens. More scattering will weaken the concentration of the light, thus prone to yellow spots. Also, since the number of the glass lenses and the light-emitting members is usually multiple, the scattered light will irradiate the adjacent glass lens or light-emitting member. Therefore, phenomena such as aperture ghosting and lamp bead imaging will occur. Moreover, there will also be a problem of more stray light in the scattered light. In order to reduce the influence of the stray light, it is usually necessary to perform frosting treatment on the surface of the glass lens, which increases the processing procedures and improves the processing cost and production cost.
[0030] In the embodiment of the present utility model, the lens body 2 has an inner side and an outer side. An incident light surface 3 and an emergent light surface 4 are respectively provided on the inner side and the outer side of the lens body 2. The inner side of the lens body 2 is a concave surface, and the outer side of the lens body 2 is a convex surface. The light source member 10 is located inside the lens body 2. Therefore, when emitting light, the light first enters the incident light surface 3 on the inner side of the lens body 2 and then exits from the emergent light surface 4 on the outer side of the lens body 2. The lens body 2 is a surface of revolution. The incident light surface 3 is formed by at least one curve rotating around the central axis 5 of the incident light surface 3. The light emitted by the light source member 10 can enter the lens body 2 from the surface formed by the rotation of the curve and exit from the middle of the emergent light surface 4. Since most of the light can exit from the middle of the emergent light surface 4, the phenomenon of light scattering from the edge of the emergent light surface 4 can be reduced. On the one hand, reducing scattering can weaken the aperture ghosting and reduce the stray light phenomenon. On the other hand, the concentration of light can improve the illumination uniformity and reduce the appearance of yellow spots. Moreover, the reduction of edge scattering can reduce the irradiation of the lamp beads and the side of the lens, thereby reducing the phenomenon of lamp bead imaging. In the embodiment of the present utility model, by improving the structure of the lens body 2, the yellow spots are faded, and the phenomena of aperture ghosting, lamp bead imaging and stray light appearance are reduced. There is no need to perform surface treatment on the lens body 2, so the processing procedures can be reduced, the production efficiency is greatly improved, and the production and processing costs are reduced.
[0031] The beneficial effects of the embodiment of the present utility model are as follows:
[0032] The lens device for a floodlight in the embodiment of the present utility model is provided with a lens plate 1 and a lens body 2. The light source member of the floodlight is arranged on the side of the incident light surface 3 inside the lens body 2. The incident light surface 3 inside the lens body 2 is a concave curved surface, and the emergent light surface 4 outside the lens body 2 is a convex curved surface. The light emitted by the light source member can enter the lens body 2 from the incident light surface 3 and exit from the middle of the emergent light surface 4, so that the emission range of most of the light can be limited to the middle of the emergent light surface 4, greatly reducing the phenomena of light beam dispersion, uneven brightness distribution and light scattering, alleviating or eliminating the problems of aperture ghosting, yellow spot effect, lamp bead image and stray light appearance, thereby improving the lighting effect. Moreover, in this process, there is no need to process the surface of the lens body 2, and the processing and production costs can be reduced.
[0033] Specifically, refer to Figure 3, the longitudinal section of the light incident surface 3 includes a first curve 6. The first curve 6 is disposed in the middle of the longitudinal section of the light incident surface 3. A first light incident portion 31 is provided in the middle of the light incident surface 3. The first light incident portion 31 is formed by rotating the first curve 6 around the central axis 5. The light exit surface 4 includes a first light exit portion 41. The first light exit portion 41 is disposed in the middle of the light exit surface 4. Part of the light emitted by the light source member 10 can enter the lens body 2 from the first light incident portion 31 and exit from the first light exit portion 41. By reasonably setting the curvature change of the first curve 6 and the proportion of the first light incident portion 31 in the light incident surface 3, it can be ensured that most of the light of the light source member 10 can exit from the first light exit portion 41 in the middle of the light exit surface 4.
[0034] By setting the curvature change of the first curve 6 and the proportion of the first light incident portion 31 in the light incident surface 3, the angle formed by the light falling within the first light incident portion 31 and the central axis 5 can be made between 0° and 65°. The light with an angle formed with the central axis 5 between 0° and 65° covers most of the light within the normal emission range of the light source member 10, which is about 75%, and is the distribution range of the principal rays. In this way, most of the light can exit through the first light exit portion 41 in the middle of the light exit surface 4. These rays enter the lens body 2 for refraction. According to Snell's law, when the rays enter the lens body 2 with a larger refractive index, the refraction angle will be smaller than the incident angle. At the same time, by controlling the curvature and coverage of the first light incident portion 31, the light incident within a large range can be constrained within a smaller range, reducing the scattering of the light. Subsequently, the light exits from the first light exit portion 41. By controlling the curvature of the first light exit portion 41, the refraction angle of the light exiting from the lens body 2 to the external air can be limited to be further smaller than the refraction angle of the light within the lens body 2, thereby obtaining an ideal light projection angle and reducing the edge scattered light. After testing, in the embodiment of the present invention, the angle of the light exiting from the light exit surface 4 is between 31° and 32°, which can meet the technical requirements of a 30° floodlight, while weakening the aperture ghosting, lightening the yellow spot, and reducing the stray light.
[0035] In addition, referring to Figure 4, the longitudinal section of the light incident surface 3 includes a second curve 7, the second curve 7 is connected to the side of the first curve 6 away from the central axis 5, a second light incident part 32 is connected to the side of the first light incident part 31 away from the central axis 5, the second light incident part 32 is formed by rotating the second curve 7 around the central axis 5, most of the light rays outside the principal ray will enter the lens body 2 from the second light incident part 32, and the light exit surface 4 includes a second light exit part 42, the second light exit part 42 is arranged on the side of the first light exit part 41 away from the central axis 5, part of the light rays emitted by the light source member 10 can enter the lens body 2 from the second light incident part 32 and be emitted from the second light exit part 42 and the lens plate 1. By controlling the curvature and coverage range of the second light incident part 32, most of the light rays can be emitted from the second light exit part 42, and the remaining small part is emitted from the lens plate 1. The light rays emitted from the lens plate 1 only account for a small proportion, so that the light rays can be made to approach the direction close to the central axis 5 as much as possible, so as to improve the light concentration and the irradiation uniformity of the exit area, thereby reducing the phenomena of aperture ghosting, yellow spot and lamp bead imaging, and reducing the stray light at the edge. This light is most of the other light rays except the principal ray.
[0036] Specifically, in the embodiment of the present invention, the angle formed by the light rays falling within the second light incident part 32 and the central axis 5 is between 60° and 88°. The light rays in this range cover about 20%-25% of the light rays within the normal emission range of the light source member 10. Coupled with the light rays emitted from the first light exit part 41, nearly 95% of the light rays are emitted from the first light exit part 41 and the second light exit part 42, which can greatly ensure the light concentration, reduce the edge scattered light, thereby reducing the phenomena of aperture ghosting, yellow spot and lamp bead imaging, and reducing the stray light at the edge.
[0037] Further, referring to Figure 5 , the longitudinal section of the light incident surface 3 includes a third curve 8, the third curve 8 is connected to the side of the second curve 7 away from the central axis 5, a third light incident part 33 is connected to the side of the second light incident part 32 away from the central axis 5, the third light incident part 33 is formed by rotating the third curve 8 around the central axis 5, part of the light rays emitted by the light source member 10 can enter the lens body 2 from the third light incident part 33 and be emitted from the lens plate 1. The third light incident part 33 is used to receive the remaining little light rays, so only a little light rays enter the lens body 2 through the third light incident part 33 and are finally emitted from the lens plate 1. By controlling the curvature and coverage range of the third light incident part 33, most of this part of the light rays can be deflected towards the direction of the central axis 5, thereby further reducing the scattering at the edge, thereby reducing the phenomena of aperture ghosting and lamp bead imaging, and reducing the stray light at the edge.
[0038] Specifically, in the embodiment of the present utility model, the angle formed by the light falling within the third light incident portion 33 and the central axis 5 is between 85° and 90°. The light within this range only accounts for about 5% of the light within the normal emission range of the light source member 10. This proportion is relatively small, which can significantly reduce the edge scattered light, and can significantly fade the yellow spot, reduce the ghosting, reduce the imaging of the lamp beads and the stray light.
[0039] The longitudinal section of the light emitting surface 4 includes a light emitting curve 9, and the first light emitting portion 41 and the second light emitting portion 42 are formed by rotating the light emitting curve 9 around the central axis 5.
[0040] See Figures 6 - 10 , in the embodiment of the present invention, through the cooperation between the first light incident portion and the first light emitting portion, the cooperation between the second light incident portion and the second light emitting portion and the lens plate, and the cooperation between the third light incident portion and the lens plate, the effects of light concentration, uniform light distribution in the middle region, reduction of stray light and reduction of yellow spot are achieved. After testing, the angle of the light emitted from the light emitting surface 4 in the embodiment of the present utility model is between 31° and 32°. It can not only meet the technical requirements of a 30° floodlight, but also the spot produced on the receiving surface at a straight-line distance of 5 m has a soft cut-off, uniform transition, and no adverse phenomena such as stray light yellow spot, aperture ghosting, and lamp bead chip imaging, and the visual effect is excellent.
[0041] The embodiment of the present utility model also discloses a floodlight (not shown in the drawings), including the lens device for floodlight as described above. The lens device for floodlight includes a lens plate 1 and a lens body 2. The light source member 10 is disposed on the side of the light incident surface 3 inside the lens body 2, and the light incident surface 3 is formed by rotating at least one curve around the central axis 5 of the light incident surface 3. The light emitted by the light source member 10 can enter the lens body 2 from the surface formed by the rotation of the curve and be emitted from the middle of the light emitting surface 4 to form the light of the floodlight. Therefore, most of the light emitted by the light source member 10 can be concentrated in the middle of the light emitting surface 4, reducing the emission of the edge light, and can achieve the concentrated emission of light, thereby fading the yellow spot, reducing the aperture ghosting, lamp bead imaging and the appearance of stray light. Moreover, by improving the structure, it is possible to avoid adding processes such as surface treatment, greatly improving the production efficiency and reducing the production cost.
[0042] The above are the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.
Claims
1. A lens device for a floodlight, characterized in that: The floodlight comprises a light source, and the lens device for the floodlight comprises a lens plate and a lens body arranged on the lens plate, and the position of the lens body corresponds to the position of the light source; The inner side and the outer side of the lens body are respectively provided with a light-incoming surface and a light-emitting surface, the light-incoming surface is an inner concave curved surface, and the light-emitting surface is an outer convex curved surface, and the light emitted by the light source can enter the lens body from the light-incoming surface and be emitted from the middle of the light-emitting surface.
2. The lens device for a floodlight according to claim 1, characterized in that: The longitudinal section of the light-incoming surface includes a first curve, a first light-incoming portion is provided in the middle of the light-incoming surface, and the first light-incoming portion is formed by rotating the first curve around the central axis of the light-incoming surface. The light-emitting surface includes a first light-emitting portion, and the first light-emitting portion is provided in the middle of the light-emitting surface. Part of the light emitted by the light source can enter the lens body from the first light-incoming portion and be emitted from the first light-emitting portion.
3. The lens device for a floodlight according to claim 2, characterized in that: The angle formed between the light rays falling into the first light-incoming portion and the central axis is between 0° and 65°.
4. The lens device for a floodlight according to claim 2, characterized in that: The longitudinal section of the light-incoming surface includes a second curve, which is connected to a side of the first curve away from the central axis, and a second light-incoming portion is connected to the side of the first light-incoming portion away from the central axis, and the second light-incoming portion is formed by rotating the second curve around the central axis. The light-emitting surface includes a second light-emitting portion, which is arranged on a side of the first light-emitting portion away from the central axis, and part of the light emitted by the light source can enter the lens body from the second light-incoming portion and be emitted from the second light-emitting portion and the lens plate.
5. The lens device for a floodlight according to claim 4, characterized in that: The angle formed between the light rays falling into the second light input portion and the central axis is between 60° and 88°.
6. The lens device for a floodlight according to claim 4, characterized in that: The longitudinal section of the light-entering surface includes a third curve, and the third curve is connected to a side of the second curve away from the central axis. The side of the second light-entering portion away from the central axis is connected to a third light-entering portion, and the third light-entering portion is formed by rotating the third curve around the central axis. Part of the light emitted by the light source can enter the lens body from the third light-entering portion and be emitted from the lens plate.
7. The lens device for a floodlight according to claim 6, characterized in that: The angle formed between the light rays falling into the third light-entry portion and the central axis is between 85° and 90°.
8. The lens device for a floodlight according to claim 4, characterized in that: The longitudinal section of the light emitting surface includes a light emitting curve, and the first light emitting portion and the second light emitting portion are formed by rotating the light emitting curve around the central axis.
9. The lens device for a floodlight according to claim 1, characterized in that: There are multiple lens bodies, and the multiple lens bodies are arranged on the lens plate in a staggered manner.
10. A floodlight, characterized in that: The invention comprises a lens device for a floodlight as described in any one of claims 1 to 9.