Optical lens, lamp and lighting equipment

Abstract

The embodiment of the utility model discloses an optical lens, a lamp and lighting equipment, comprising: a lens body, the lens body having a light incident surface and a light emergent surface which are located at two opposite sides in the thickness direction of the lens body; the lens body comprises a light inlet surface and a light outlet surface, the light inlet surface is arranged to be a plane, the light outlet surface comprises a convex spherical surface and an annular concave surface, the convex spherical surface is arranged in the middle of the annular concave surface, and the convex spherical surface and the light inlet surface are oppositely arranged in the thickness direction of the lens body; the part, located between the light incident face and the convex spherical face, of the lens body is composed of a microprism array set.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting fixtures, and in particular to an optical lens, a lamp and a lighting device. Background Art

[0002] Currently, there are many optical solutions for achieving convergent projection on the market. Regardless of the optical path, they are all based on the optical path design algorithm that regards the light source as a point, hereinafter referred to as the "point light source algorithm". However, the actual light source's luminous surface is much larger than a point, especially for COB light sources (COB light sources are high-power integrated surface light sources, which are high-efficiency integrated surface light source technologies that directly attach LED chips to a highly reflective mirror metal substrate). The light source has a large luminous area, and the point light source algorithm cannot control the light emitted from the edge of the light source, thus forming a secondary light spot that causes the UGR to soar.

[0003] After the COB light source spot is collimated, there is an obvious yellow edge. The existing technology uses bead-dot diffusion to eliminate the yellow edge, but it will also cause a large secondary light spot, which will cause glare and affect the light output efficiency and lighting effect. Utility Model Content

[0004] In view of this, the utility model provides an optical lens, a lamp and a lighting device, which are used to solve the problem that the edge light forms a secondary light spot and causes glare, thereby affecting the light output efficiency and lighting effect.

[0005] The utility model provides an optical lens, which comprises:

[0006] A lens body, wherein the lens body has a light incident surface and a light emitting surface located on two opposite sides in a thickness direction of the lens body;

[0007] The light incident surface is set as a plane, and the light emitting surface includes a convex spherical surface and an annular concave surface, the convex spherical surface is arranged in the middle of the annular concave surface, and the convex spherical surface and the light incident surface are arranged opposite to each other in the thickness direction of the lens body;

[0008] Wherein, the portion of the lens body located between the light incident surface and the convex spherical surface is composed of a microprism array group.

[0009] In one of the embodiments, a transition fillet is formed at the annular connection between the convex spherical surface and the annular concave surface, and the cross-section of the transition fillet is set to be a concave arc surface structure.

[0010] In one embodiment, the height of the annular concave surface away from the edge of the light incident surface is greater than the height of the vertex of the convex spherical surface.

[0011] In one of the embodiments, the lens body is further provided with an annular convex surface with a closed structure, and the annular convex surface is arranged around the outer periphery of the light incident surface.

[0012] In one embodiment, the cross-sectional area of ​​the lens body decreases gradually from the light emitting surface to the light incident surface, so that the lens body forms a cone-shaped columnar structure.

[0013] In one embodiment, the lens body further includes a positioning protrusion, which is in an annular structure and is arranged at one end of the lens body located on the light emitting surface and surrounds the outer circumference of the annular concave surface.

[0014] In one embodiment, the positioning protrusion is provided with at least one notch groove, and the notch groove penetrates through two opposite sides of the positioning protrusion along the thickness direction of the lens body.

[0015] In one embodiment, the lens body further includes a card body, which is disposed in the notch groove and is gap-matched with groove walls on both sides of the notch groove.

[0016] The utility model also provides a lamp, comprising:

[0017] A lamp housing, wherein a mounting cavity is formed inside the lamp housing;

[0018] a light source component, wherein the light source component is disposed in the installation cavity; and

[0019] As described above, the optical lens is arranged in the mounting cavity and is located directly in front of the light emitting surface of the light source component.

[0020] The utility model also provides a lighting device, which comprises the lamp as described above.

[0021] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0022] The optical lens of the present scheme is provided with a light entrance surface and a light exit surface located on opposite sides in the thickness direction thereof. When the light beam emitted by the light source is captured by the optical lens from the plane light entrance surface and then emitted from the light exit surface, the main light beam located in the center area of ​​the light beam is mainly emitted from the convex spherical surface, and the light spot is mixed by the precise diffusion of the light beam by the microprism array group, and finally is accurately converged to the area requiring illumination under the action of refraction. The light beam at the peripheral edge portion of the light beam incident from the outer peripheral edge of the light entrance surface cannot be converged by the convex spherical surface, and will pass through the convex spherical surface and be emitted to the annular concave surface. The annular concave surface will further refract the light beam at the edge portion, thereby achieving precise control of the light spot and guiding the light beam at the edge portion to the area requiring illumination, thereby achieving uniform expansion of the light spot of the light beam by the optical lens, meeting the lighting requirements while preventing the formation of secondary light spots, avoiding glare, and ensuring light output efficiency and lighting effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] in:

[0025] Figure 1 is a schematic structural diagram of an optical lens according to an embodiment;

[0026] Figure 2 for Figure 1 A schematic diagram of a top view structure;

[0027] Figure 3 for Figure 2 Cross-sectional structure diagram at AA in the middle.

[0028] Description of reference numerals:

[0029] 10. Lens body; 11. Light incident surface; 12. Light exit surface; 121. Convex spherical surface; 122. Annular concave surface; 13. Annular convex surface; 14. Positioning convex edge; 141. Notch groove; 142. Card body; 20. Transition fillet. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figures 1 to 3 As shown, an optical lens according to an embodiment includes a lens body 10, and the lens body 10 has a light incident surface 11 and a light exit surface 12 located on opposite sides of the thickness direction thereof. It can be understood that the so-called light incident surface 11 refers to the side where the light beam emitted by the light source enters the optical lens; the so-called light exit surface 12 refers to the side where the light beam exits from the optical lens.

[0035] In this application, in order to reduce the installation space occupied and reduce the manufacturing and use costs, the optical lens adopts an ultra-thin structure design with a thickness range of 6mm-15mm. Of course, other numerical ranges can also be used in other embodiments.

[0036] In the present application, the light incident surface 11 is set as a plane. The so-called plane means that the light incident surface 11 has a flat and smooth structure. However, the plane can be perpendicular to the incident light beam, or can be arranged at a certain angle, which can be selected according to actual needs.

[0037] The light emitting surface 12 includes a convex spherical surface 121 and an annular concave surface 122 . The convex spherical surface 121 is arranged in the middle of the annular concave surface 122 , and the convex spherical surface 121 and the light incident surface 11 are arranged opposite to each other in the thickness direction of the lens body 10 .

[0038] The portion of the lens body 10 between the light incident surface 11 and the convex spherical surface 121 is composed of a micro-prism array group.

[0039] The implementation of the embodiments of the utility model will have the following beneficial effects: the optical lens of the present scheme is provided with a light incident surface 11 and a light emitting surface 12 located on opposite sides of the thickness direction thereof; when the light beam emitted by the light source is captured by the optical lens from the planar light incident surface 11 and then emitted from the light emitting surface 12, the main light beam located in the central area of ​​the light beam is mainly emitted from the convex spherical surface 121, and the light beam is precisely diffused by the microprism array group to achieve light spot mixing, and finally accurately converged to the area requiring illumination under the action of refraction; the light beam at the peripheral edge portion of the light beam incident from the outer peripheral edge of the light incident surface 11 cannot be converged by the convex spherical surface 121, and will pass through the convex spherical surface 121 and be emitted onto the annular concave surface 122; the annular concave surface 122 will further refract the light beam at the edge portion, thereby achieving precise control of the light spot, so as to guide the light beam at the edge portion to the area requiring illumination, thereby achieving uniform expansion of the light spot of the light beam by the optical lens, meeting the lighting requirements while preventing the formation of secondary light spots, avoiding glare, and ensuring light output efficiency and lighting effects.

[0040] In one embodiment, a transition fillet 20 is formed at the annular connection between the convex spherical surface 121 and the annular concave surface 122, and the cross section of the transition fillet 20 is set as an inner concave arc surface structure. Compared with forming a sharp-angle transition structure between the convex spherical surface 121 and the annular concave surface 122, which is not only difficult to manufacture, but also prone to stress concentration and cracks, and also causes the edge part of the light to form disordered propagation in the lens body 10, designing the annular connection between the convex spherical surface 121 and the annular concave surface 122 as a transition fillet 20 with an inner concave arc surface structure can well solve the above problems.

[0041] like Figure 3 As shown, in one embodiment, the height of the annular concave surface 122 away from the edge of the light incident surface 11 is greater than the height of the vertex of the convex spherical surface 121. This increases the coverage of the annular concave surface 122, and enables the edge area light that is emitted from the edge of the convex spherical surface 121 but cannot obtain the convergence effect to be completely emitted to the annular concave surface 122, and then all the edge area light is reflected to the area that needs to be illuminated, thereby preventing some edge area light from not being diffused and forming secondary light spots, causing glare problems, and affecting the light output efficiency and lighting effect.

[0042] In one embodiment, the lens body 10 is further provided with an annular convex surface 13 of a closed structure, and the annular convex surface 13 is arranged around the outer periphery of the light incident surface 11. The annular convex surface 13 is arranged in a flared shape on the outer periphery of the light incident surface 11, and can guide the discrete light at the edge of the light beam emitted by the light source to the light incident surface 11 and correct the optical path, thereby ensuring that all the light beams can be incident on the light incident surface 11, thereby ensuring the light output effect.

[0043] When the optical lens is used, it needs to be installed in the installation cavity of the lamp housing of the lamp. For example, when the lamp is a downlight, the lamp housing is a cylindrical structure. Therefore, in one embodiment, the cross-sectional area of ​​the lens body 10 decreases from the light emitting surface 12 to the light incident surface 11, so that the lens body 10 forms a head cone columnar structure. The size of the end with the smallest cross section of the lens body 10 is smaller than the entrance size of the lamp housing, so that the lens body 10 can be quickly and accurately inserted into the lamp housing, reducing the difficulty of installation.

[0044] like Figures 1 to 3 As shown, further, in one embodiment, the lens body 10 further includes a positioning convex edge 14, which is an annular structure, and is arranged at one end of the lens body 10 located at the light emitting surface 12, and surrounds the outer circumference of the annular concave surface 122. A stop convex edge is provided on the inner wall of the installation cavity of the lamp housing, and when the lens body 10 is pushed into the lamp housing at a preset depth position, the positioning convex edge 14 will abut against the stop convex edge to realize the installation and positioning of the optical lens.

[0045] Furthermore, in another embodiment, the positioning flange 14 is provided with at least one notch groove 141, and the notch groove 141 penetrates the opposite sides of the positioning flange 14 along the thickness direction of the lens body 10. In addition, a fixing block is provided on the inner wall of the installation cavity of the lamp housing, and as the optical lens is continuously pushed into the interior of the lamp housing, the fixing block is automatically inserted into the notch groove 141, and the optical lens and the lamp housing can be further assembled and fixed, thereby improving the connection strength between the two.

[0046] In addition, in one embodiment, the lens body 10 further includes a card body 142, which is disposed in the notch groove 141 and is gap-matched with the groove walls on both sides of the notch groove 141. The fixing block is also provided with a bayonet, which is engaged with the bayonet by means of the card body 142, thereby further improving the firmness of the assembly of the optical lens and the lamp housing.

[0047] It should also be noted that this application is actually used, and it also requires a COB deep anti-glare free-form surface algorithm based on an extended light source to overcome the light source expansion effect, perform energy control for the entire light source, and accurately calculate the direction of light by controlling the edge of the light source rather than the center. In real light source applications, the light spot can be accurately controlled in the area that needs to be illuminated without secondary light spots and stray light, thereby achieving deep anti-glare control on the lens. The technology of achieving deep protection using a single lens can achieve a deep anti-glare effect of UGR<9 without using light cutting technologies such as deep tubes and small holes.

[0048] The utility model also provides a lamp, comprising:

[0049] A lamp housing, wherein a mounting cavity is formed inside the lamp housing;

[0050] A light source component is disposed in the mounting cavity; and

[0051] As mentioned above, the optical lens is arranged in the mounting cavity and is located directly in front of the light emitting surface of the light source.

[0052] The utility model also provides a lighting device, which comprises the above lamp.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An optical lens, characterized in that: include: A lens body, wherein the lens body has a light incident surface and a light emitting surface located on two opposite sides in a thickness direction of the lens body; The light incident surface is set as a plane, and the light emitting surface includes a convex spherical surface and an annular concave surface, the convex spherical surface is arranged in the middle of the annular concave surface, and the convex spherical surface and the light incident surface are arranged opposite to each other in the thickness direction of the lens body; Wherein, the portion of the lens body located between the light incident surface and the convex spherical surface is composed of a microprism array group.

2. The optical lens according to claim 1, wherein: A transition fillet is formed at the annular connection between the convex spherical surface and the annular concave surface, and the cross section of the transition fillet is set to be an inner concave arc surface structure.

3. The optical lens according to claim 1, wherein: The height of the annular concave surface away from the edge of the light incident surface is greater than the height of the vertex of the convex spherical surface.

4. The optical lens according to claim 1, wherein: The lens body is further provided with an annular convex surface of a closed structure, and the annular convex surface is arranged around the outer periphery of the light incident surface.

5. The optical lens according to claim 1, wherein: The cross-sectional area of ​​the lens body decreases gradually from the light emitting surface to the light incident surface, so that the lens body forms a head cone columnar structure.

6. The optical lens according to claim 1, wherein: The lens body further comprises a positioning convex edge, which is in an annular structure and is arranged at one end of the lens body located at the light emitting surface and surrounds the outer circumference of the annular concave surface.

7. The optical lens according to claim 6, wherein: The positioning convex edge is provided with at least one notch groove, and the notch groove penetrates through two opposite sides of the positioning convex edge along the thickness direction of the lens body.

8. The optical lens according to claim 7, wherein: The lens body also includes a card body, which is arranged in the notch groove and is gap-matched with groove walls on both sides of the notch groove.

9. A lamp, characterized in that: include: A lamp housing, wherein a mounting cavity is formed inside the lamp housing; A light source component, wherein the light source component is disposed in the mounting cavity; as well as The optical lens according to any one of claims 1 to 8, wherein the optical lens is disposed in the mounting cavity and is directly in front of the light emitting surface of the light source component.

10. A lighting device, characterized in that: Comprising the lamp as claimed in claim 9.

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