Lens, optical system and linear wall washer

Abstract

The utility model relates to the field of illumination, in particular to a lens, an optical system and a linear wall washer. The lens comprises an incident area and an emergent area which are arranged in the first direction, and a reflection area is formed on the outer side wall face between the incident area and the emergent area. The incident area is provided with a light incident groove, the light incident groove can receive light rays from a light source, and a first incident surface and a second incident surface which are inclined to each other are formed at the groove bottom of the light incident groove; the emergent area is provided with a first emergent area and a second emergent area which are arranged in the second direction, the projection of the light inlet groove in the first direction falls into the range of the projection of the first emergent area in the first direction, and the projection of the light inlet groove in the first direction is spaced from the projection of the second emergent area in the first direction; a first part of light of the light source can be emitted to the first emergent area from the first incident plane, and a second part of light of the light source can be emitted to the second emergent area from the second incident plane. According to the utility model, the brightness of the root of a light spot can be improved under the condition that the wall washing height is not obviously reduced.

Description

Technical Field

[0001] The utility model relates to the field of lighting, and particularly relates to a lens, an optical system and a linear wall washer lamp. Background Art

[0002] The wall washer lamp is used for illuminating the wall surface, and can make the light wash over the wall surface like water, and is often used for illuminating the indoor wall surface or the building facade; the traditional wall washer lamp itself does not have polarization, and there will be an obvious dark area at the bottom of the light spot formed on the wall surface during wall washing (also called the root, which is the part of the light spot close to the wall washer lamp).

[0003] To solve the above problems, a wall washer lamp with self-polarization has been developed. By the polarization effect, the distribution position of the wall washing light spot is changed as a whole. Although it can optimize the darkening of the bottom of the light spot, the overall wall washing height is reduced a lot, and it is difficult to meet the use requirements under some conditions. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the background art, and provide a lens, an optical system and a linear wall washer lamp, which can make up for the dark area at the root of the wall washing light spot without significantly reducing the wall washing height.

[0005] In the first aspect, the utility model provides a lens, which includes an incident area and an exit area arranged along a first direction. A reflection area is formed on the outer side wall surface between the incident area and the exit area; the incident area has a light incident groove, and the light incident groove can receive light from a light source. The bottom of the light incident groove is formed with a first incident surface and a second incident surface that are inclined; the exit area has a first exit area and a second exit area arranged along a second direction. The projection of the light incident groove in the first direction falls within the projection range of the first exit area in the first direction, and the projection of the light incident groove in the first direction is spaced from the projection of the second exit area in the first direction; the first part of the light of the light source can be emitted from the first incident surface to the first exit area, and the second part of the light of the light source can be emitted from the second incident surface to the second exit area.

[0006] For the lens provided by the utility model, through the first incident surface and the second incident surface that are inclined to each other at the bottom of the light incident groove, the incident light can be divided into at least two parts. Among them, the first part of the light is emitted from the first incident surface to the first exit area, and after being exported, it can form the main light illumination; the second part of the light is emitted from the second incident surface to the second exit area. Since the projection of the light incident groove in the first direction is spaced from the projection of the second exit area in the first direction, the second part of the light is emitted to the second exit area in a posture inclined to the first direction. After being exported, the second part of the light can improve the brightness of the edge area on one side of the main light illumination; the reflection area has a reflection function, and the reflected light can be exported from the exit area to improve the overall brightness.

[0007] Taking some preferred usage scenarios as examples: The lens of the present utility model can be used in wall washing lights, and the second light-emitting area is arranged closer to the wall surface than the first light-emitting area; among the incident light, the first part of the light can be used for wall washing and form a wall washing light spot on the wall surface; after the second part of the light is emitted from the second light-emitting area, it can illuminate the dark area at the root of the wall washing light spot and weaken the darkening effect at the root.

[0008] For the lens described in the present utility model, since the first part of the light and the second part of the light are relatively independent, the first part of the light can achieve the required wall washing height according to the design requirements, and under the illumination of the second part of the light, it can optimize the dark area at the root of the wall washing light spot; thus, without significantly reducing the wall washing height, the brightness at the root of the wall washing light spot can be increased, achieving a better wall washing lighting effect.

[0009] Preferably, the first incident surface faces the first light-emitting area; the second incident surface faces the second light-emitting area.

[0010] Preferably, the first incident surface is a free-form surface that bulges outward; the second incident surface is a free-form surface that bulges outward.

[0011] The free-form surface that bulges outward has a light-gathering effect. The first incident surface is a free-form surface that bulges outward, which can converge the first part of the light incident on the lens from the first incident surface to the first light-emitting area, and can converge the first part of the light to form a narrow light beam to increase the effective range of this part of the light, thereby forming a higher wall washing light spot on the wall surface; the second incident surface is a free-form surface that bulges outward, which can converge the light incident on the lens from the second incident surface to the second light-emitting area, reducing light dissipation, thereby increasing the brightness at the root of the wall washing light spot.

[0012] Preferably, the groove wall of the light-incident groove constitutes a third incident surface, and the third part of the light of the light source can be incident on the reflection area from the third incident surface and be reflected to the first light-emitting area.

[0013] By adjusting the reflection direction of the reflection area, most of the light incident on the lens from the third incident surface can be reflected to the first light-emitting area, thereby increasing the brightness of the main illumination area.

[0014] Preferably, inside the lens, the reflecting surface is a concave surface.

[0015] Inside the lens, the reflecting surface is a concave surface, and the concave surface has a light-gathering effect, which can converge the light incident on the reflecting surface to form a narrow light beam to increase the effective range of this part of the light, thereby forming a higher wall washing light spot on the wall surface.

[0016] Preferably, the reflection area includes a reflecting surface, the reflecting surface is a revolving surface, and the axis of revolution of the reflecting surface is parallel to the first direction.

[0017] Preferably, the first light-emitting area includes a first light-emitting structure, a second light-emitting structure, and a third light-emitting structure that are arranged in sequence along the second direction and are serrated. The first light-emitting structure has a first light-emitting surface, the second light-emitting structure has a second light-emitting surface, and the third light-emitting structure has a third light-emitting surface. The first light-emitting surface, the second light-emitting surface, and the third light-emitting surface are concave curved surfaces.

[0018] The concave inclined curved surface has a polarization effect, can form a polarized light beam, and enables the light to irradiate the wall surface more evenly, so as to form clean and beautiful illumination on the wall surface. The plurality of serrated light-emitting structures can reduce the thickness of the light-emitting area while achieving the polarization effect.

[0019] Preferably, the first light-emitting surface, the second light-emitting surface, and the third light-emitting surface are concave free-form surfaces.

[0020] Preferably, the first light-emitting surface, the second light-emitting surface, and the third light-emitting surface have light-emitting microstructures. The light-emitting microstructures are arranged by a plurality of micro-units, and the planar projection of the micro-units is a non-equilateral hexagon.

[0021] The free-form surface and the light-emitting microstructures can adjust the light, so that the emitted light becomes a polarized light beam similar to a rectangle when washing the wall, which can make the light distribution on the wall surface more uniform, the washing wall light spot softer, and avoid dazzling due to too high local brightness.

[0022] Preferably, the second light-emitting area includes a fourth light-emitting surface, and the fourth light-emitting surface is a convex arc surface.

[0023] The convex arc surface has a converging effect on the light. It can first converge the light in a certain local range, and the light diverges after crossing this local range. In this way, the second part of the light can have a longer range and maintain a higher light energy density within a certain range, so that when irradiating the wall surface at a certain distance from the lens, the illumination brightness is higher.

[0024] In a second aspect, the present invention provides an optical system, including an LED light source and the lens as described above. At least part of the light emitted by the LED light source is incident on the light-incident groove.

[0025] In a third aspect, the present invention provides a linear wall washer, including the optical system as described above.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] A lens provided by the present utility model can divide incident light into at least two parts through a first incident surface and a second incident surface with inclined bottoms of the light incident grooves. Among them, the first part of the light is incident from the first incident surface to the first light-emitting area, and after being led out, it can form the main illumination; the second part of the light is incident from the second incident surface to the second light-emitting area. Since the projection of the light incident groove in the first direction is spaced from the projection of the second light-emitting area in the first direction, the second part of the light is incident on the second light-emitting area in a posture inclined to the first direction. After being led out, the second part of the light can improve the brightness of the edge area on one side of the main illumination; the reflection area has a reflection function, and the reflected light can be led out from the light-emitting area to improve the overall brightness. Taking some preferred usage scenarios as examples: The lens described in the present utility model can be used for wall washing lights, and the second light-emitting area is arranged closer to the wall than the first light-emitting area; among the incident light, the first part of the light can be used for wall washing and form a wall washing light spot on the wall; after the second part of the light is led out from the second light-emitting area, it can illuminate the dark area at the root of the wall washing light spot and weaken the dark effect at the root. For the lens described in the present utility model, since the first part of the light and the second part of the light are relatively independent, the first part of the light can achieve the required wall washing height according to design requirements, and under the illumination of the second part of the light, it can optimize the dark area at the root of the wall washing light spot; thus, without significantly reducing the wall washing height, the brightness of the root of the wall washing light spot can be improved, achieving a better wall washing lighting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a cross-section of the lens described in the present utility model Figure 1 ;

[0029] Figure 2 is a light-emitting schematic diagram (including light-emitting microstructures) of the lens described in the present utility model;

[0030] Figure 3 is a rectangular polarized light beam emitted from the first light-emitting area;

[0031] Figure 4 is a cross-section of the lens described in the present utility model Figure 2 ;

[0032] Figure 5 is Figure 4 detail drawing of part A in

[0033] Figure 6 is a three-dimensional view of the lens described in the present utility model Figure 1 ;

[0034] Figure 7 is Figure 6 detail drawing of part B in

[0035] Figure 8 is a three-dimensional view of the lens described in the present utility model Figure 2 ;

[0036] Figure 9 The front view of the lens described in the present utility model;

[0037] Figure 10 is Figure 9 the enlarged view of part C in

[0038] Figure 11 The oblique rear view of the lens described in the present utility model;

[0039] Figure 12 The light-emitting schematic diagram of the lens described in the present utility model (excluding the light-emitting microstructure). Markings in the figure:

[0040] 1 - Incident area;

[0041] 11 - Light-incident groove;

[0042] 111 - First incident surface; 112 - Second incident surface; 113 - Third incident surface;

[0043] 12 - Axis of rotation;

[0044] 13 - Lens body;

[0045] 2 - Exit area;

[0046] 21 - First exit area;

[0047] 211 - First exit surface; 212 - Second exit surface; 213 - Third exit surface;

[0048] 22 - Second exit area;

[0049] 221 - Fourth exit surface;

[0050] 23 - Micro unit;

[0051] 24 - Sinking side;

[0052] 25 - Rising side;

[0053] 26 - Exit plate;

[0054] 3 - Reflection area;

[0055] 4 - Light source. Specific embodiments

[0056] The present utility model will be further described in detail below in conjunction with specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present utility model to the following embodiments. Any technology implemented based on the content of the present utility model belongs to the scope of the present utility model.

[0057] Unless otherwise specified, in the description of the specific embodiments of the present utility model, the expression terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product / device / equipment of the present utility model is commonly used. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present utility model or simplifying the description in the specific embodiments, so as to facilitate technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present utility model.

[0058] In addition, when terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in the directions of "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still play its role in the solution of the present utility model.

[0059] In addition, when expressions such as "first", "second", "third", etc. appear in the terms, they are only used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of a specific component.

[0060] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a plurality of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be more than 9.

[0061] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / limited, where terms such as "set", "installed", "connected", "connected", "provided with", "laid", "arranged" appear, they 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 connection means commonly used in the art such as welding, riveting, bolting, threaded connection, etc. This connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0062] Example 1

[0063] As Figures 1-12 shown, a lens provided in this embodiment includes an incident region 1 and an exit region 2 arranged along a first direction, and a reflection region 3 is formed on an outer wall surface between the incident region 1 and the exit region 2; the incident region 1 has a light incident groove 11, the light incident groove 11 can receive light from a light source 4, and a first incident surface 111 and a second incident surface 112 which are inclined to each other are formed on the bottom of the light incident groove 11; the exit region 2 has a first exit area 21 and a second exit area 22 arranged along a second direction; a first part of the light from the light source 4 can be incident from the first incident surface 111 to the first exit area 21, and a second part of the light from the light source 4 can be incident from the second incident surface 112 to the second exit area 22.

[0064] The incident region 1 can be used for light to enter the lens, the exit region 2 can be used for light to exit the lens, and the reflection region 3 can be used for reflecting light inside the lens; when the light transmits through the lens, it can directly enter the exit region 2 from the incident region 1 and then be exported; or it can enter the reflection region 3 from the incident region 1, and after reflection, enter the exit region 2 and then be exported.

[0065] This application defines a first direction, and the incident region 1 and the exit region 2 are arranged in sequence along the first direction; this application defines a second direction, and the second direction is perpendicular to the first direction; this application also defines a third direction, and the third direction is perpendicular to the first direction and the second direction.

[0066] The incident region 1 is provided with a light incident groove 11, and the light incident groove 11 is a concave groove type, including an annular groove wall and a groove bottom connected to the groove wall; in use, the light source 4 can be arranged inside the light incident groove 11 or at the opening of the light incident groove 11, so that the light emitted by the light source 4 can enter the lens from the groove wall and the groove bottom of the light incident groove 11.

[0067] For this embodiment, a first incident surface 111 and a second incident surface 112 which are inclined to each other are formed on the bottom of the light incident groove 11. The first incident surface 111 and the second incident surface 112 can be plane or curved surfaces. The so-called "inclined to each other" means that there is an obvious crease or demarcation line between the first incident surface 111 and the second incident surface 112 to distinguish and define the two surfaces; the first incident surface 111 and the second incident surface 112 can be directly connected or separated by other surfaces; as Figure 1 、 11 shown, in this embodiment, the first incident surface 111 and the second incident surface 112 are preferably two connected curved surfaces.

[0068] The light-emitting area 2 includes a first light-emitting area 21 and a second light-emitting area 22 arranged in sequence along the second direction; the first part of the light emitted by the light source 4 enters the first light-emitting area 21 after passing through the first incident surface 111, and the main light illumination can be formed after being led out from the first light-emitting area 21 for main illumination. The second part of the light emitted by the light source 4 enters the second light-emitting area 22 after passing through the second incident surface 112, and the auxiliary light illumination can be formed after being led out from the second light-emitting area 22 for increasing the brightness of the edge on one side of the main light illumination.

[0069] Preferably, the area of the first light-emitting area 21 is larger than that of the second light-emitting area 22, which can enable more light to be emitted from the first light-emitting area 21, facilitating the increase of the main light illumination brightness.

[0070] Preferably, the projection of the light-incident groove 11 in the first direction falls within the range of the projection of the first light-emitting area 21 in the first direction, and the projection of the light-incident groove 11 in the first direction is spaced apart from the projection of the second light-emitting area 22 in the first direction. The second part of the light can enter the second light-emitting area 22 in a posture significantly inclined to the first direction, and the second part of the light can point to the root of the light spot formed by the main light illumination, thereby increasing the brightness of the root of the light spot.

[0071] Further preferably, the first incident surface 111 faces the first light-emitting area 21, which can enable the first part of the light to enter the first light-emitting area 21 without reflection; the second incident surface 112 faces the second light-emitting area 22, which can enable the second part of the light to enter the second light-emitting area 22 without reflection.

[0072] A lens provided by the present utility model can divide the incident light into at least two parts through the first incident surface 111 and the second incident surface 112 with inclined bottoms of the light-incident groove 11, wherein the first part of the light shoots from the first incident surface 111 to the first light-emitting area 21, and the main light illumination can be formed after being led out; the second part of the light shoots from the second incident surface 112 to the second light-emitting area 22. Since the projection of the light-incident groove 11 in the first direction is spaced apart from the projection of the second light-emitting area 22 in the first direction, the second part of the light shoots to the second light-emitting area 22 in a posture inclined to the first direction, and the second part of the light can increase the brightness of the edge area on one side of the main light illumination after being led out; the reflection area 3 has a reflection function, and the reflected light can be led out from the light-emitting area 2 to increase the overall brightness.

[0073] Taking some preferred usage scenarios as examples: the lens described in the present utility model can be used for a wall washer lamp, and the second light-emitting area 22 is arranged closer to the wall than the first light-emitting area 21; among the incident light, the first part of the light can be used for wall washing and form a wall-washing light spot on the wall; after the second part of the light is led out from the second light-emitting area 22, it can illuminate the dark area at the root of the wall-washing light spot and weaken the darkening effect at the root.

[0074] For the lens of the present utility model, since the first part of the light rays and the second part of the light rays are relatively independent, the first part of the light rays can achieve the required wall-washing height according to the design requirements, and under the irradiation of the second part of the light rays, the dark area at the root of the wall-washing light spot can be optimized; thus, without significantly reducing the wall-washing height, the brightness at the root of the wall-washing light spot can be increased, achieving a better wall-washing lighting effect.

[0075] Preferably, both the first incident surface 111 and the second incident surface 112 are plane-symmetric structures, and the two are symmetric with respect to the same symmetric plane, and this symmetric plane is parallel to the first direction and the second direction.

[0076] In one or several preferred embodiments, the first incident surface 111 is a free-form surface that bulges outward; the second incident surface 112 is a free-form surface that bulges outward.

[0077] As Figure 1 shown, the middle parts of the first incident surface 111 and the second incident surface 112 bulge toward the light-incident groove 11. This outwardly bulging free-form surface has a good light-gathering effect, which can converge the first part of the light rays entering the lens from the first incident surface 111 to the first exit area 21, and converge the first part of the light rays to form a narrow light beam. The light energy density of the narrow light beam is relatively high, and it can maintain a relatively high light energy density at a relatively far position after exiting the lens, which can increase the effective range of the light rays and form a higher wall-washing light spot on the wall.

[0078] The second incident surface 112 is a free-form surface that bulges outward, which can converge the second part of the light rays entering the lens from the second incident surface 112 to the second exit area 22, reduce the dissipation of the second part of the light rays inside the lens, and make more light rays exit from the second exit area 22 to increase the brightness at the root of the wall-washing light spot.

[0079] In one or several preferred embodiments, the groove wall of the light-incident groove 11 constitutes a third incident surface 113, and the third part of the light rays of the light source 4 can be incident on the reflection area 3 from the third incident surface 113 and be reflected to the first exit area 21.

[0080] As Figure 1 、 4 、5 shown, the reflection area 3 has a reflection surface, and the reflection surface can be arranged in a ring shape between the incident area 1 and the exit area 2. The reflection surface can reflect the light rays irradiated thereon, thereby improving the light utilization rate. The groove wall of the light-incident groove 11 constitutes a third incident surface 113. Most of the light rays incident on the lens from the third incident surface 113 are incident on the reflection surface and are reflected by the reflection surface to the exit area 2; by adjusting the shape and inclination angle of the reflection surface, more of this part of the light rays can be reflected to the first exit area 21, thereby increasing the brightness of the main light illumination.

[0081] A preferred way of setting the reflecting surface is: setting the reflecting surface as a concave surface inside the lens. Through the light-gathering effect of the concave surface, the third part of the light can be reflected and converged to form a narrow beam, so that most of the light can be reflected to the first light-emitting area 21. Moreover, the narrow beam can increase the effective range of the light and form a higher wall-washing light spot on the wall surface.

[0082] Further preferably, the reflecting surface is a surface of revolution, and the axis of revolution is parallel to the first direction. Those skilled in the art can understand that the surface of revolution refers to the surface formed by a plane or a space curve rotating around an axis, and the axis around which it rotates is called the axis of revolution 12; the surface of revolution has high symmetry and can make the light distribution more uniform.

[0083] In addition, the light rays directed to the first light-emitting area 21 can also be increased by increasing the area of the first light-emitting area 21.

[0084] Preferably, the opening of the light-incident groove 11 is enclosed by the reflecting surface to reduce the light leaking from the incident area 1.

[0085] In one or several preferred embodiments, the first light-emitting area 21 includes a first light-emitting structure, a second light-emitting structure, and a third light-emitting structure arranged in sequence along the second direction and in a zigzag shape. The first light-emitting structure has a first light-emitting surface 211, the second light-emitting structure has a second light-emitting surface 212, and the third light-emitting structure has a third light-emitting surface 213; the first light-emitting surface 211, the second light-emitting surface 212, and the third light-emitting surface 213 are concave curved surfaces.

[0086] As Figure 1 、 6 、Figure 7 shows, the zigzag first light-emitting structure, second light-emitting structure, and third light-emitting structure all include a sinking side 24 and a rising side 25. The sinking side 24 is closer to the incident area 1, the rising side 25 is slightly farther from the incident area 1, and there is a light-emitting surface (the first light-emitting surface 211, the second light-emitting surface 212, or the third light-emitting surface 213) that is recessed into the lens between the rising side 25 and the sinking side 24, thus forming a concave inclined curved surface; for this application, as Figure 2 、 12 shown, the rising side 25 of the same light-emitting structure is closer to the second light-emitting area 22. When the light rays pass through the light-emitting surface, the light rays closer to the rising side 25 have a larger deflection angle, and the light rays closer to the sinking side 24 have a smaller deflection angle. In this way, the light can be irradiated on the wall surface more evenly, so as to form a clean and beautiful light on the wall surface; multiple zigzag light-emitting structures can reduce the thickness of the light-emitting area (the principle of reducing the thickness is similar to that of a Fresnel lens) while achieving the polarization effect.

[0087] As Figure 2 、 12 shown, most of the first part of the light rays are emitted from the first light-emitting surface 211.

[0088] Preferably, the first exit surface 211, the second exit surface 212, and the third exit surface 213 are concave free-form surfaces.

[0089] Preferably, the first exit surface 211, the second exit surface 212, and the third exit surface 213 have light-emitting microstructures, and the light-emitting microstructures are arranged by a number of micro-units 23, and the planar projection of the micro-unit 23 is a non-equilateral hexagon. As Figure 5 , 7 , 10, 9 show that the micro-unit 23 can be a convex hexagon, and the curvatures of the projection of the micro-unit 23 in the XZ plane and the YZ plane are different.

[0090] Through the free-form surface and the light-emitting microstructures, the light rays emitted from the first exit area 21 can be adjusted into a polarized beam similar to a rectangle when washing the wall, as Figure 3 shown, so that the light distribution on the wall surface is more uniform, the wall-washing light spot is softer, and the local brightness is avoided from being too high to cause glare to people.

[0091] As Figure 6 shown, in this application, the X direction is defined as the third direction, the Y direction is defined as the second direction, and the Z direction is defined as the first direction. In this application, both concave and convex are perceived from the outside of the lens, and the specific protruding and concave directions can be referred to the accompanying drawings.

[0092] In one or several preferred embodiments, the second exit area 22 includes a fourth exit surface 221, and the fourth exit surface 221 is a convex arc surface, as Figure 1 shown.

[0093] It can be understood that the convex arc surface has a converging effect on light rays, which can first converge the light rays in a certain local range, and the light rays diverge after passing through the local range. In this way, the second part of the light rays can have a longer range and a higher light energy density within a certain range, so that when illuminating the wall surface at a certain distance from the lens, the illumination brightness is higher.

[0094] Preferably, the fourth exit surface 221 is a smooth surface, a frosted surface, or is provided with an optical microstructure (similar to the light-emitting microstructure).

[0095] Preferably, the first exit surface 211, the second exit surface 212, the third exit surface 213, and the fourth exit surface 221 are strip-shaped structures extending in the third direction, and can be used for linear wall-washing lights to wash the wall surface of a certain length.

[0096] As Figure 2 , 12 shown, the principle of the present utility model is:

[0097] The light rays emitted by the light source 4 generally pass through three optical paths. The first optical path is as follows: The first part of the light rays emitted by the light source 4 are incident on the first exit area 21 from the first incident surface 111 and are transmitted out from the first exit area 21. The second optical path is as follows: The second part of the light rays emitted by the light source 4 are incident on the second exit area 22 from the second incident surface 112 and are transmitted out from the second exit area 22. The third optical path is as follows: The third part of the light rays emitted by the light source 4 are incident on the reflection area 3 from the third incident surface 113, and after reflection, most of them are incident on the first exit area 21 and are transmitted out.

[0098] The light rays emitted from the first exit area 21 are used to form the main light illumination. When washing the wall, the main light illumination can form a relatively bright wall-washing light spot. The light rays emitted from the second exit area 22 are used to form the auxiliary light illumination. The auxiliary light illumination has an inclination angle relative to the first direction. By placing the second exit area 22 closer to the wall surface than the first exit area 21, the auxiliary light illumination can be used to illuminate the dark area at the root of the wall-washing light spot, thereby optimizing the situation where the root of the wall-washing light spot is dark.

[0099] Embodiment 2

[0100] A lens provided in this embodiment, on the basis of Embodiment 1, includes a lens body 13 and an exit plate 26, where: One end of the lens body 13 is provided with an incident area 1, the other end is connected to the exit plate 26, and a reflection area 3 is formed on the side wall of the lens body 13; The incident area 1 has a light-incident groove 11, and the bottom of the light-incident groove 11 is provided with an inclined first incident surface 111 and a second incident surface 112. The exit plate 26 has a first exit area 21 and a second exit area 22 arranged in sequence along the second direction.

[0101] Among the incident light rays, the first part of the light rays can be incident on the first exit area 21 from the first incident surface 111 and be led out; The second part of the light rays can be incident on the second exit area 22 from the second incident surface 112 and be led out.

[0102] Preferably, at least two lens bodies 13 arranged in a straight line are provided on the same exit plate 26, which can be used for a linear wall-washing lamp to perform wall-washing illumination on a wall of a certain length.

[0103] Embodiment 3

[0104] As Figures 1-11As shown in the figure, a lens provided in this embodiment is different from that in Embodiment 2 on the basis of Embodiment 1. In this embodiment, the lens body 13 is approximately frustum-shaped, including a large end and a small end. The large end of the lens body 13 is connected to the light-incident side of the light-emitting plate 26. The small end of the lens body 13 has a light-incident groove 11. The bottom of the light-incident groove 11 is provided with an inclined first incident surface 111 and a second incident surface 112, and both the first incident surface 111 and the second incident surface 112 are convex free-form surfaces; the side wall of the lens body 13 is provided with a reflecting surface, and the reflecting surface surrounds the lens body 13 in a ring shape, so that light can leak out less or not at all from the side wall of the lens body 13.

[0105] The light-emitting plate 26 is provided with a light-emitting area 2, including a first light-emitting surface 211, a second light-emitting surface 212, a third light-emitting surface 213, and a fourth light-emitting surface 221 arranged in sequence along the second direction, where: the first light-emitting surface 211, the second light-emitting surface 212, and the third light-emitting surface 213 are concave free-form surfaces, and all three are inclined to the second direction; the fourth light-emitting surface 221 is a convex arc surface, and this arc surface faces the outside of the light-emitting plate 26.

[0106] Preferably, the first light-emitting surface 211, the second light-emitting surface 212, the third light-emitting surface 213, and the fourth light-emitting surface 221 are strip-shaped and extend along the third direction; and at least two lens bodies 13 are provided on the light-incident side of the light-emitting plate 26, and all the lens bodies 13 are arranged in a straight line along the third direction.

[0107] Embodiment 4

[0108] An optical system provided in this embodiment includes an LED light source and a lens as described in Embodiment 1 or 2 or 3, and at least part of the light emitted by the LED light source is incident on the light-incident groove 11.

[0109] The number of LED light sources can be one or more; the LED light sources can be arranged inside the light-incident groove 11, at the opening of the light-incident groove 11, or at intervals from the opening of the light-incident groove 11.

[0110] Embodiment 5

[0111] A linear wall washer provided in this embodiment includes the optical system as described in Embodiment 4.

[0112] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lens, characterized in that: It comprises an incident area (1) and an exit area (2) arranged along a first direction, and a reflection area (3) is formed on an outer wall surface between the incident area (1) and the exit area (2); The incident area (1) has a light incident groove (11), the light incident groove (11) is capable of receiving light from a light source (4), and the bottom of the light incident groove (11) is formed with a first incident surface (111) and a second incident surface (112) that are inclined relative to each other; The exit region (2) comprises a first exit area (21) and a second exit area (22) arranged along a second direction, the projection of the light entrance groove (11) in the first direction falls within the range of the projection of the first exit area (21) in the first direction, and the projection of the light entrance groove (11) in the first direction is spaced from the projection of the second exit area (22) in the first direction; A first portion of light from the light source (4) can be emitted from the first incident surface (111) toward the first exit area (21), and a second portion of light from the light source (4) can be emitted from the second incident surface (112) toward the second exit area (22).

2. The lens according to claim 1, characterized in that The first incident surface (111) faces the first exit area (21); and the second incident surface (112) faces the second exit area (22).

3. The lens according to claim 1, characterized in that The first incident surface (111) is an outwardly convex free-form surface; and the second incident surface (112) is an outwardly convex free-form surface.

4. The lens according to claim 1, characterized in that The groove wall of the light incident groove (11) forms a third incident surface (113), and a third portion of light from the light source (4) can be emitted from the third incident surface (113) toward the reflection area (3) and reflected to the first emission area (21).

5. The lens according to claim 4, characterized in that The reflection area (3) comprises a reflection surface: Inside the lens, the reflecting surface is a concave surface; And / or, the reflecting surface is a rotating surface, and the rotating axis (12) of the reflecting surface is parallel to the first direction.

6. The lens according to any one of claims 1 to 5, characterized in that: The first light exit area (21) comprises a first light exit structure, a second light exit structure and a third light exit structure which are arranged in sequence along the second direction and are in a sawtooth shape, the first light exit structure having a first light exit surface (211), the second light exit structure having a second light exit surface (212), and the third light exit structure having a third light exit surface (213); The first emission surface (211), the second emission surface (212) and the third emission surface (213) are concave curved surfaces.

7. The lens according to claim 6, characterized in that: The first emission surface (211), the second emission surface (212) and the third emission surface (213) are concave free-form surfaces; and / or, The first emission surface (211), the second emission surface (212) and the third emission surface (213) have a light emission microstructure, the light emission microstructure is formed by arranging a plurality of micro units (23), and the plane projection of the micro units (23) is a non-equilateral hexagon.

8. The lens according to any one of claims 1 to 5, characterized in that: The second emission area (22) comprises a fourth emission surface (221), and the fourth emission surface (221) is an outwardly convex arc surface.

9. An optical system, characterized in that: It comprises an LED light source and a lens as claimed in any one of claims 1 to 8, wherein at least part of the light emitted by the LED light source is incident into the light entrance groove (11).

10. A linear wall washer lamp, characterized in that: Comprising the optical system as claimed in claim 9.

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