Light spot uniformizing lens
By designing a lens with uniform light spot, the angle between the reflecting surface and the horizontal direction is 89°~90°, and the light-emitting surface is provided with a wavy stripe structure, which solves the problems of uneven light spot and yellow light when the lenses are arranged at close distances, and improves the fill light lighting effect and brightness uniformity.
Patent Information
- Application Number
- CN202422937480.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-29
AI Technical Summary
When existing lenses are arranged at close distances, the light spot on the lower half of the screen is uneven and accompanied by yellow light, resulting in poor fill lighting effect.
A lens with uniform light spot is designed. The angle between the tangent plane at the highest point of the reflecting surface and the horizontal direction is 89°~90°. The light-emitting surface is provided with a wavy stripe structure. The light-emitting surface is a central concave curved surface and is fixed by a mounting plate to ensure that the light evenly covers the lower half of the screen and avoid the appearance of yellow light.
The light spot achieves uniform coverage of the lower half of the screen, significantly improving the fill light effect and increasing the brightness and lighting uniformity.
Smart Images
Figure CN223318945U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of optical lenses, and in particular relates to a lens with uniform light spots. Background Art
[0002] With the continuous advancement and development of lighting technology, various light sources have been widely used in fields such as lighting and advertising. The original distribution of the light spot of conventional light sources generally follows the simulation principle of Lambertian light sources. When using them, the ideal spatial distribution characteristics of light intensity are determined according to specific lighting needs and usage scenarios, such as the desired lighting effect and actual application context. To achieve this goal, a light distribution lens is installed in the direction of the light source's projection light to perform secondary light distribution design on the light source. The light distribution lens is a precision optical component, and its own structure will directly affect the light distribution effect.
[0003] Currently, when the lens used in advertising light boxes or wall washers is used very close to the screen or wall (within 40 mm), the light projected by the lens will show an uneven light spot in the lower half (i.e., the area close to the ground or the bottom of the wall), accompanied by yellow light, resulting in poor fill lighting effect. Utility Model Content
[0004] The utility model aims to provide a lens with uniform light spot, which solves the technical problem in the prior art that uneven light spot and yellow light appear on the lower half of the screen when the lens is arranged at a close distance.
[0005] The utility model discloses a lens with uniform light spot, comprising:
[0006] The lens cup body has an upper end surface forming a light-emitting surface, a lower end surface forming a backlight surface, a light-entering hole being provided on the backlight surface, and an outer peripheral surface of the lens cup body forming a reflective surface. The reflective surface is an outward convex surface arranged around the optical axis, and the angle between the tangent plane at the highest point and the horizontal direction is in the range of 89° to 90°.
[0007] This application makes the angle between the tangent plane at the highest point of the reflecting surface and the horizontal direction range from 89° to 90°, which can guide the light to be projected onto the screen at a large angle, or even in a direction close to the horizontal, thereby ensuring that the light can evenly cover the lower half of the screen, including the area at the same horizontal height as the lens, and effectively avoid the appearance of yellow light, significantly improving the effect of fill lighting.
[0008] On the basis of the above technical solution, the solution of this application can also be improved as follows:
[0009] Preferably, the light-emitting surface is provided with a wavy stripe structure, the cross-section of the stripe structure is composed of alternating concave arcs and convex arcs, and the starting and ending ends are both the concave arcs; by adopting this solution, the light can be refracted and dispersed while achieving a predetermined angle of light distribution, thereby improving the uniformity of brightness over a larger range, and making part of the light refracted to illuminate the lower half of the screen at an angle closer to the horizontal, thereby further improving the uniformity of lighting.
[0010] Preferably, the light-emitting surface is a centrally concave curved surface, and the angle between the tangent plane of the outer edge and the horizontal direction is in the range of 30° to 35°; by adopting this solution, the light can be made more dispersed, thereby expanding the illumination range, and making the light intensity in the illumination area appropriate, thereby improving the uniformity of the overall illumination.
[0011] Preferably, the curvature radius of the concave arc is 1 mm to 0.5 mm, and the curvature radius of the convex arc is 1 mm to 1.5 mm; adopting this solution, the refraction dispersion effect is better.
[0012] Preferably, the side wall of the light entrance hole is a straight annular surface with the top inclined inward, and the bottom of the light entrance hole is a central convex curved surface; adopting this solution, it is convenient to demold during production, and part of the emitted light can be converged so that the lighting effect meets the use requirements.
[0013] Preferably, it includes:
[0014] The mounting plate is sleeved on the lower end of the reflecting surface; adopting this solution makes it easy to install and fix the lens.
[0015] Preferably, the mounting plate comprises:
[0016] A plate body, sleeved on the lower end of the reflecting surface;
[0017] A support ring is provided at the bottom of the plate and is sleeved outside the light entrance hole;
[0018] A plurality of support blocks are provided at the bottom of the plate body and arranged around the support ring;
[0019] The bottom surfaces of the support ring and the support block are on the same horizontal plane. This solution facilitates gluing and fixing of the lens, and seals the light entrance hole to prevent the glue from interfering with the light source.
[0020] Preferably, the mounting plate comprises:
[0021] A plurality of positioning protrusions are arranged at intervals on the bottom surface of the support ring; this solution can play a positioning role, improve the accuracy and portability of lens installation, and ensure the lighting effect.
[0022] Preferably, the light emitting surface, the backlight surface, the light entrance hole, the reflective surface and the mounting plate are all arranged coaxially with the optical axis; adopting this solution ensures that the light is evenly distributed on the imaging surface, avoiding the appearance of obvious dark areas or bright areas, thereby improving the uniformity of the lighting.
[0023] Through the above technical solution, the utility model achieves the following beneficial effects:
[0024] 1. By making the reflective surface a convex curved surface arranged around the optical axis, with the tangent plane at its highest point forming an angle between 89° and 90° with the horizontal direction, this device can guide light onto the screen at a large angle, even in a nearly horizontal direction. This ensures that the light evenly covers the lower half of the screen, including the area at the same level as the lens, effectively avoids the appearance of yellow light, and significantly improves the fill lighting effect.
[0025] 2. This application provides a wavy stripe structure on the light-emitting surface. The cross-section of the stripe structure is composed of alternating concave arcs and convex arcs, with both the starting and ending ends being concave arcs. This allows the light to be distributed at a predetermined angle while refracting and dispersing the light, thereby improving brightness uniformity over a wider range. It also refracts some light to illuminate the lower half of the screen at an angle closer to horizontal, further improving illumination uniformity.
[0026] 3. This application sets the light-emitting surface as a central concave curved surface, which can make the light more dispersed when passing through the light-emitting surface, thereby expanding the illumination range. By limiting the angle range between the tangent plane of the outer edge and the horizontal direction to 30°~35°, the light intensity in the illumination area is appropriate, thereby improving the uniformity of the overall illumination. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0028] Figure 1 This is a cross-sectional schematic diagram of a uniform spot lens according to a specific embodiment of the present utility model;
[0029] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;
[0030] Figure 3 for Figure 1 The schematic diagram of the structure of the lens with uniform light spot at the upper viewing angle is shown;
[0031] Figure 4 for Figure 1 The schematic diagram of the structure of the lens with uniform light spot at the bottom viewing angle is shown;
[0032] Figure 5 for Figure 1 Schematic diagram of illumination of lens with uniform light spot;
[0033] Figure 6 for Figure 1 Schematic diagram of the arrangement of the lens for uniform light spot;
[0034] Description of reference numerals:
[0035] 1. Lens cup; 11. Light-emitting surface; 12. Backlight surface; 13. Light entrance hole; 131. Flat annular surface; 132. Central convex curved surface; 14. Reflecting surface; 15. Stripe structure; 151. Concave arc; 152. Convex arc;
[0036] 2. Mounting plate; 21. Plate body; 22. Support ring; 23. Support block; 24. Positioning protrusion. DETAILED DESCRIPTION
[0037] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.
[0038] First of all, it should be noted that in the following description, some directional words involved in order to clearly illustrate the technical solution of the present invention, such as the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are all based on the normal meanings of the components in a uniform spot lens by analogy. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.
[0039] In this application, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0040] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.
[0041] Example:
[0042] like Figures 1 to 4 As shown, the embodiment of the present application discloses a lens with uniform light spot, which is used in advertising light boxes or wall washers. The specific structure includes: a lens cup body 1, which is a cup-shaped structure that is wide at the top and narrow at the bottom. It can be made of a transparent material such as silicone, acrylic, polycarbonate or glass, without limitation.
[0043] Specifically, the upper end surface of the lens cup body 1 forms a light-emitting surface 11, the lower end surface of the lens cup body 1 forms a backlight surface 12, the backlight surface 12 is provided with a light entrance hole 13, and the outer peripheral surface of the lens cup body 1 forms a reflective surface 14; wherein, the reflective surface 14 is an outward convex curved surface arranged around the optical axis, and the angle between the tangent plane at the highest point and the horizontal direction is in the range of 89° to 90°.
[0044] It can be understood that the angle between the tangent plane at the highest point of the reflecting surface 14 and the horizontal direction ranges from 89° to 90°, which means that the top of the reflecting surface 14 is very steep and almost completely perpendicular to the horizontal plane. Therefore, the light here will follow the law of reflection, that is, the incident angle is approximately equal to the reflection angle.
[0045] It should be noted that the optical axis refers to the optical axis of the ideal optical system in which the lens is located, that is, the straight line in the ideal optical system in which the lens is located that does not deflect light. It is only used to illustrate the working principles and technical effects of the lenses in each embodiment and should not be understood as limiting the present technical solution.
[0046] The above technical solution, such as Figure 5 As shown, it works as follows:
[0047] During installation, the lens is arranged vertically upward and placed at a close distance (within 40 mm) from the curtain or wall, and then the light source is installed in the light entrance hole 13.
[0048] During illumination, light is released from the light source, and a portion of the light directed toward the left side is scattered near the top of the reflective surface 14 after passing through the medium inside the lens cup 1, and then is released to the outside after being reflected near the top of the reflective surface 14 and refracted by the light-emitting surface 11. It can illuminate the curtain or wall on the right side at a large angle or even a nearly horizontal angle, thereby ensuring that the light can evenly cover the lower half of the curtain and even the area at the same horizontal position as the lens.
[0049] By making the angle between the tangent plane at the highest point of the reflecting surface 14 and the horizontal direction range from 89° to 90°, the utility model can guide the light to be projected onto the screen at a large angle, or even in a direction close to the horizontal, thereby ensuring that the light can evenly cover the lower half of the screen, including the area at the same horizontal height as the lens, and effectively avoid the appearance of yellow light, thereby significantly improving the effect of fill lighting.
[0050] In some embodiments, as Figure 1 and Figure 2 As shown, the light emitting surface 11 is provided with a wavy stripe structure 15 . The cross section of the stripe structure 15 is composed of alternately connected concave arcs 151 and convex arcs 152 , and the starting and ending ends are both concave arcs 151 .
[0051] During irradiation, Figure 6 As shown, the stripe structure 15 is set to be perpendicular to the screen. Therefore, due to the presence of alternating protrusions and depressions, it can refract and disperse the light while achieving a predetermined angle of light distribution, thereby improving the uniformity of brightness over a wider range.
[0052] In addition, if Figure 2 As shown, by setting the starting and ending ends of the cross section of the stripe structure 15 to be concave arcs 151, it can diverge the light so that part of the light is refracted to illuminate the lower half of the screen at an angle closer to the horizontal, thereby further improving the lighting uniformity.
[0053] For example, the curvature radius of the lower concave arc 151 is 1 mm to 0.5 mm, and the curvature radius of the upper convex arc 152 is 1 mm to 1.5 mm, which has a better refractive dispersion effect.
[0054] In some embodiments, as Figure 1 and Figure 2 As shown, the light emitting surface 11 is a centrally concave curved surface, and the angle between the tangent plane of the outer edge and the horizontal direction is in the range of 30° to 35°.
[0055] By setting the light-emitting surface 11 as a central concave curved surface, the light can be more dispersed when passing through the light-emitting surface 11, thereby expanding the illumination range. By limiting the angle range between the tangent plane of the outer edge and the horizontal direction to 30°~35°, the light intensity in the illumination area is appropriate, thereby improving the uniformity of the overall illumination.
[0056] In some embodiments, as Figure 1 As shown, the side wall of the light incident hole 13 is a straight annular surface 131 with the top end tilted inward; the bottom of the light incident hole 13 is a central convex curved surface 132.
[0057] The above-mentioned arrangement of the light entrance hole 13 facilitates demoulding during production and can converge part of the emitted light so that the lighting effect meets the use requirements.
[0058] In some embodiments, as Figure 1 As shown, it includes: a mounting plate 2, which is sleeved on the lower end of the reflecting surface 14 to facilitate the installation and fixation of the lens.
[0059] In this embodiment, the mounting plate 2 includes: a plate body 21, a support ring 22 and a plurality of support blocks 23, which are configured as follows:
[0060] The plate 21 is sleeved on the lower end of the reflective surface 14 and is preferably square with chamfered corners on all sides.
[0061] The support ring 22 is provided at the bottom of the plate 21 and is sleeved outside the light entrance hole 13. It is preferably annular and is coaxially arranged with the light entrance hole 13.
[0062] A plurality of support blocks 23 are provided at the bottom of the plate body 21 and arranged around the support ring 22, preferably four in number and evenly distributed at the four corners of the plate body 1;
[0063] The bottom surfaces of the support ring 22 and the support block 23 are on the same horizontal plane, so as to ensure that the lens can be stably supported.
[0064] Through the above arrangement, a gap for placing glue is formed at the bottom of the plate 21, which facilitates gluing and fixing of the lens, and the support ring 22 can seal the light entrance hole 13 to prevent the glue from interfering with the light source.
[0065] Based on the above embodiments, Figure 1 and Figure 4 As shown, the mounting plate 2 further includes: a plurality of positioning protrusions 24 , which are arranged at intervals on the bottom surface of the support ring 22 .
[0066] Exemplarily, there are two positioning protrusions 24 symmetrically arranged on both sides of the bottom surface of the support ring 22 , but the present invention is not limited thereto and is not specifically limited thereto.
[0067] The above arrangement can play a role in positioning, improve the accuracy and portability of lens installation, and ensure the lighting effect.
[0068] In some embodiments, the light emitting surface 11, the backlight surface 12, the light entrance hole 13, the reflective surface 14 and the mounting plate 2 are all arranged coaxially with the optical axis, which ensures that the light is evenly distributed on the imaging surface, avoids obvious dark areas or bright areas, and thus improves the uniformity of the lighting.
[0069] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.
[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.
[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.
Claims
1. A lens with uniform light spot, characterized in that: include: The lens cup body has an upper end surface forming a light-emitting surface, a lower end surface forming a backlight surface, a light-entering hole being provided on the backlight surface, and an outer peripheral surface of the lens cup body forming a reflective surface. The reflective surface is an outward convex surface arranged around the optical axis, and the angle between the tangent plane at the highest point and the horizontal direction is in the range of 89° to 90°.
2. The uniform spot lens according to claim 1, characterized in that: The light emitting surface is provided with a wavy stripe structure, the cross section of the stripe structure is composed of alternately connected concave arcs and convex arcs, and the starting and ending ends are both the concave arcs.
3. The uniform spot lens according to claim 2, characterized in that: The light emitting surface is a centrally concave curved surface, and the angle between the tangent plane of the outer edge and the horizontal direction is in the range of 30° to 35°.
4. The uniform spot lens according to claim 2, characterized in that: The curvature radius of the concave arc is 1 mm to 0.5 mm, and the curvature radius of the convex arc is 1 mm to 1.5 mm.
5. The uniform spot lens according to claim 1, characterized in that: The side wall of the light entrance hole is a straight annular surface with the top end inclined inwards, and the bottom of the light entrance hole is a central convex curved surface.
6. The uniform spot lens according to claim 1, characterized in that: include: The mounting plate is sleeved on the lower end of the reflecting surface.
7. The uniform spot lens according to claim 6, characterized in that: The mounting plate comprises: A plate body, sleeved on the lower end of the reflecting surface; A support ring is provided at the bottom of the plate and is sleeved outside the light entrance hole; A plurality of support blocks are provided at the bottom of the plate body and arranged around the support ring; Wherein, the bottom surfaces of the support ring and the support block are in the same horizontal plane.
8. The uniform spot lens according to claim 7, characterized in that: The mounting plate comprises: A plurality of positioning protrusions are arranged at intervals on the bottom surface of the support ring.
9. The uniform spot lens according to claim 6, characterized in that: The light-emitting surface, the backlight surface, the light-entering hole, the reflecting surface and the mounting plate are all coaxially arranged with the optical axis.