A non-rotationally symmetric lens and a luminaire

Abstract

This invention relates to the field of lighting lens technology, and provides a non-rotationally symmetrical lens and luminaire. The non-rotationally symmetrical lens includes a lens body comprising an inner curved surface and an outer curved surface. Notches are provided on both sides of the lens body along a first direction, which is perpendicular to the central axis of the lens body. A reflecting surface is provided on the sidewall of the inner curved surface facing the notches. The angle between the reflecting surface and the first direction is greater than zero. The reflecting surface reflects light rays incident on it back to both sides of the lens body along a second direction, which is perpendicular to the first direction and the central axis of the lens body. This invention overcomes the technical problem in the prior art where the lens body uses a rotationally symmetrical structure, resulting in a small illumination range along the width of the light strip after assembly, requiring multiple light strips to be used, thus increasing the material and installation costs of the luminaire.

Description

Technical Field

[0001] This invention relates to the field of lighting lens technology, and in particular to a non-rotationally symmetrical lens and lamp. Background Technology

[0002] A lens is a structure widely used in the lighting industry, commonly used in various lighting fixtures such as panel lights and kitchen and bathroom lights. The body of a conventional lens is generally a rotationally symmetrical rotating body structure, such as a disc shape or a hemispherical shape, with a cavity at its bottom to accommodate the LED chip. The sidewall of the cavity is called the inner curved surface, and the outward-facing side of the lens body is called the outer curved surface. When the LED chip is placed in the cavity, the light emitted from the LED chip is refracted and dispersed inside the lens body, thereby evenly dispersing the relatively concentrated light emitted by the LED chip around the lens body.

[0003] However, when these lens bodies are used in combination, such as arranging multiple lens bodies in a row as a light strip, the illumination range of the light strip formed by combining them will be roughly elongated because the light emission distribution of a single lens body is basically the same in all directions. That is, the illumination range along the length of the light strip is large, but the illumination range along the width of the light strip is small. This can easily lead to problems such as insufficient light flux on the left and right sides of the light strip resulting in dark spots, or excessive light flux between two adjacent lens bodies resulting in bright spots. Therefore, in order to obtain a good and uniform lighting effect, it is often necessary to densely set multiple light strips along the width of the light strip to compensate for the insufficient illumination range of the light strip in its width direction. However, this will also increase the material cost and installation cost of the lighting fixture. Summary of the Invention

[0004] The purpose of this invention is to overcome the technical problem that in the prior art, the lens body adopts a rotationally symmetrical structure, which results in a small illumination range along the width of the light strip after being combined into a light strip, requiring multiple light strips to be used together, thus leading to increased material and installation costs of the lamp. The invention provides a non-rotationally symmetrical lens and lamp.

[0005] In a first aspect, the present invention provides a non-rotationally symmetric lens, comprising:

[0006] The lens body includes an inner curved surface and an outer curved surface, and notches are provided on both sides of the lens body along a first direction, which is perpendicular to the central axis of the lens body.

[0007] The reflective surface is provided on the side wall with the notch facing the inner curved surface. The angle between the reflective surface and the first direction is greater than zero. The reflective surface is used to reflect the light rays incident on the reflective surface to both sides of the lens body along the second direction. The second direction is perpendicular to the first direction and the central axis of the lens body.

[0008] The non-rotationally symmetric lens of this design has notches on both sides of the lens body along the first direction. The notches reduce the length of the generatrix of the outer curved surface along the first direction, making the lens body a non-rotationally symmetric structure. A reflective surface is provided on the notch. When light enters the lens body from the inner curved surface and propagates in various directions within the lens body, the light propagating along the second direction can exit from both sides of the outer curved surface along the second direction without obstruction. It is only dispersed by the refraction of the lens body, thus illuminating both sides of the lens body along the second direction more uniformly. Most of the light propagating along the first direction will be deflected towards the second direction by the reflection of the reflective surface and then exit from both sides of the outer curved surface along the second direction. Only a small portion of the light can pass through the reflective surface and exit from both sides of the outer curved surface along the first direction.

[0009] As can be seen from the above, compared with the existing lens body adopting a rotationally symmetrical rotating body structure, the lens body of this solution can concentrate most of the light flux entering the lens body from the inner curved surface to the second direction, so that the illumination range of the lens body along the second direction is greater than the illumination range of the first direction. When manufacturing the light strip, setting the second direction of the lens body along the width direction of the light strip can make up for the insufficient illumination range of the light strip along its width direction and reduce the light flux waste caused by the partial overlap of the illumination range between two adjacent lens bodies. This avoids the problem of dark spots on the left and right sides of the light strip or the problem of excessive brightness in the area between two adjacent lens bodies. In this way, it can reduce the distribution density and number of light strips in the lamp, reduce the material cost and installation cost of the lamp, or improve the light emission uniformity of the lamp with the same number of light strips.

[0010] It should be noted that the above description of light propagating along the first direction and light propagating along the second direction is only for the convenience of describing the general direction of light propagation. It does not mean that the path of light is completely parallel to the first and second directions, but there can also be an angle between them.

[0011] Preferably, the reflecting surface includes at least two reflecting sub-surfaces distributed along the first direction, and the angle between the reflecting sub-surfaces further away from the inner curved surface and the first direction is larger.

[0012] Since light rays entering the lens body from the inner curved surface often have various angles, this solution recommends that the reflecting surface include at least two reflecting sub-surfaces with different angles to fully reflect light rays at different angles and reduce the situation where light rays are emitted directly from the outer curved surface along the first direction without being reflected by the reflecting surface, thereby concentrating as much light flux as possible in the second direction.

[0013] Preferably, the reflector surface has an arc-shaped structure, with the reflector surface protruding on the side where the inward curved surface is located.

[0014] This scheme recommends one specific shape for the reflector surface.

[0015] Preferably, the reflecting surface includes two reflecting sub-surfaces with different angles, and the generatrix of the reflecting sub-surface closer to the inner curved surface satisfies the following function:

[0016]

[0017] In the formula, x1 and y1 represent the coordinates of any point on the reflector surface along the first and second directions, respectively;

[0018] The generatrix of the reflecting sub-surface far from the inner curved surface satisfies the following function:

[0019]

[0020] In the formula, x2 and y2 represent the coordinates of any point on the reflector surface along the first and second directions, respectively.

[0021] This scheme recommends specific functional relationships between the generatrices of the two reflective sub-surfaces when the reflective surface includes two reflective sub-surfaces with different angles. This allows light to not only be reflected to the second direction by the two reflective sub-surfaces respectively, but also to be reflected by one of the reflective sub-surfaces to the other, and then reflected a second time to the second direction. This enables the scheme to further concentrate the luminous flux in the second direction.

[0022] Preferably, the length of the generatrix of the inner curved surface in the first direction is X1, and the length of the generatrix of the inner curved surface in the second direction is Y1, where X1 is greater than Y1.

[0023] This solution recommends further making the inner curved surface a non-rotationally symmetric structure, so that the emission angle controlled by the generatrix of the inner curved surface in the second direction is smaller than the emission angle controlled in the first direction, thereby enabling the light rays along the second direction to have a smaller emission angle at the outer curved surface and to propagate to a greater range; that is, this solution can further concentrate the light flux in the second direction and improve the illumination range of the lens body along the second direction.

[0024] Preferably, the illumination range coefficient of the generatrix of the inner curved surface in the first direction is b1, and the illumination range coefficient of the generatrix of the inner curved surface in the second direction is b2, where b1 is greater than b2, and the illumination range coefficients satisfy the following formula:

[0025]

[0026] In the formula, β represents the exit angle controlled by the inner curved surface generatrix; α represents the incident angle controlled by the inner curved surface generatrix; b represents the illumination range coefficient of the inner curved surface generatrix, b can be b1 or b2; n represents the number of calculated coordinates of the inner curved surface generatrix.

[0027] This solution recommends using an illumination range coefficient to guide the design of the generatrix of the inner curved surface. The illumination range coefficient was obtained by the inventors of this invention through studying the relationship between the incident angle and the exit angle of the inner curved surface. It can be used to quantitatively reflect the size of the illumination range in the corresponding direction. The smaller the value, the larger the illumination range in the corresponding direction. Therefore, this solution can quantitatively ensure that the illumination range of the lens body in the second direction is greater than its illumination range in the first direction.

[0028] Preferably, the incident angle controlled by the inner curved surface generatrix, the exit angle controlled by the inner curved surface generatrix, and the exit angle controlled by the outer curved surface generatrix satisfy the following relationship:

[0029] β = 0.2(α + θ)

[0030] In the formula, β represents the exit angle controlled by the inner surface generatrix; α represents the incident angle controlled by the inner surface generatrix; and θ represents the exit angle controlled by the outer surface generatrix.

[0031] This scheme can establish the relative relationship between the incident angle controlled by the inner surface generatrix, the exit angle controlled by the inner surface generatrix, and the exit angle controlled by the outer surface generatrix, so as to facilitate the calculation of the generatrix of the inner and outer surfaces.

[0032] Preferably, the reflective surfaces are symmetrically arranged on both sides of the inner curved surface along the second direction.

[0033] This solution can symmetrically reflect light rays incident on the outer curved surface along the first direction to both ends of the lens body along the second direction, avoiding one end being too bright or too dark.

[0034] In a second aspect, the present invention provides a lamp comprising at least one light strip, wherein at least two non-rotationally symmetric lenses of the present invention are disposed on the light strip, the lens bodies being spaced apart along the length direction of the light strip, and the first direction of the lens bodies being disposed along the length direction of the light strip.

[0035] Compared with existing lamps whose lighting range is roughly elongated, the lens body of the lamp in this solution adopts the non-rotationally symmetric lens of this invention, which can transfer a portion of the light flux that was originally wasted between two adjacent lens bodies to both sides of the lamp strip, thereby expanding the lighting range of the lamp strip along its width. This allows for a reduction in the number of aluminum substrates in the lamp, lowering the material and installation costs of the lamp, while maintaining the same light uniformity. Alternatively, it can improve the light emission uniformity of the lamp with the same number of lamp strips.

[0036] Preferably, the spacing between two adjacent lens bodies satisfies the following relationship:

[0037]

[0038] In the formula, S represents the distribution spacing between two adjacent lens bodies; H represents the distance from the top of the lens body to the diffuser plate; θ represents the emission angle controlled by the generatrix of the outer curved surface; and L represents half the length of the generatrix of the outer curved surface along the first direction.

[0039] This solution recommends a specific relationship that should be followed for the spacing between two adjacent lens bodies. The spacing that satisfies this relationship matches the illumination range of the lens body in the first direction. This can avoid excessive overlap of the illumination ranges of two adjacent lens bodies, which would result in bright spots, and also avoid the occurrence of dark spots due to the lack of connection between the illumination ranges of two adjacent lens bodies.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0041] 1. The present invention provides a non-rotationally symmetric lens, which makes the lens body a non-rotationally symmetric structure by setting notches on both sides of the lens body along a first direction, and a reflective surface is provided on the notches;

[0042] This allows most of the light flux entering the lens body from the inner curved surface to be concentrated in the second direction, making the illumination range of the lens body along the second direction greater than that in the first direction. When manufacturing the light strip, setting the second direction of the lens body along the width of the light strip can compensate for the insufficient illumination range of the light strip along its width and reduce the waste of light flux caused by partial overlap of the illumination range between two adjacent lens bodies. This avoids the problem of dark spots on the left and right sides of the light strip or excessive brightness in the area between two adjacent lens bodies. In turn, it can reduce the distribution density and number of light strips in the lamp, reduce the material cost and installation cost of the lamp, or improve the light emission uniformity of the lamp with the same number of light strips.

[0043] The present invention can further configure the inner curved surface as a non-rotationally symmetric structure, so that the emission angle controlled by the generatrix of the inner curved surface in the second direction is smaller than the emission angle controlled in the first direction, thereby enabling the light rays along the second direction to have a smaller emission angle at the outer curved surface and to propagate over a longer range; thus enabling the present invention to further concentrate the light flux in the second direction and improve the illumination range of the lens body along the second direction.

[0044] 2. The present invention provides a lamp that, by employing the non-rotationally symmetric lens of the present invention, can transfer a portion of the light flux that was originally wasted between two adjacent lens bodies to both sides of the lamp strip, thereby expanding the illumination range of the lamp strip along its width direction. In this way, while ensuring that the uniformity of illumination remains unchanged, the number of aluminum substrates in the lamp can be reduced, the material cost and installation cost of the lamp can be reduced, or the luminous uniformity of the lamp can be improved while having the same number of lamp strips. Attached Figure Description

[0045] Figure 1This is a three-dimensional structural schematic diagram of a non-rotationally symmetric lens according to the present invention;

[0046] Figure 2 This is a top view schematic diagram of a non-rotationally symmetric lens according to the present invention;

[0047] Figure 3 This is a top cross-sectional view of a non-rotationally symmetric lens according to the present invention.

[0048] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of section AA;

[0049] Figure 5 yes Figure 3 Schematic diagram of the cross-sectional structure of section BB;

[0050] Figure 6 This is a schematic diagram of the planar light-emitting optical path of a non-rotationally symmetric lens according to the present invention;

[0051] Figure 7 This is a schematic diagram of the vertical light output path of a non-rotationally symmetric lens according to the present invention;

[0052] Figure 8 This is a schematic diagram of the elevation illumination range of a non-rotationally symmetric lens according to the present invention;

[0053] Figure 9 This is a schematic diagram illustrating the relationship between the illumination range and lens spacing of a non-rotationally symmetric lens according to the present invention;

[0054] Figure 10 This is a top view schematic diagram of a lamp according to the present invention;

[0055] Figure 11 This is a schematic diagram of the planar illumination range of a non-rotationally symmetric lens according to the present invention;

[0056] Figure 12 This is a schematic diagram illustrating the light emission uniformity of a lamp according to the present invention;

[0057] Figure 13 This is a top-view cross-sectional structural diagram of an existing rotationally symmetric lens;

[0058] Figure 14 This is a top view of the existing lighting fixture.

[0059] Figure 15 This is a schematic diagram of the luminous uniformity of existing lighting fixtures;

[0060] Icons: 1-Lens body; 11-Inner curved surface; 12-Outer curved surface; 13-Notch;

[0061] 2-Reflective surface; 21-Reflective sub-surface; 3-Light strip; 4-Diffuser plate. Detailed Implementation

[0062] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0063] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0064] Furthermore, the use of terms such as "horizontal," "vertical," "suspension," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspension," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0065] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0066] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0067] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0068] Example 1

[0069] like Figures 1 to 8 As shown, a non-rotationally symmetric lens includes a lens body 1 and a reflecting surface 2. The lens body 1 includes an inner curved surface 11 and an outer curved surface 12. Notches 13 are provided on both sides of the lens body 1 along a first direction, thereby reducing the length X2 of the generatrix of the outer curved surface 12 along the first direction and making it smaller than the length Y2 of the generatrix of the outer curved surface 12 along the second direction. The two notches 13 are provided with reflecting surfaces 2 on the sidewalls facing the inner curved surface 11. The angle between the reflecting surfaces 2 and the first direction is greater than zero. The reflecting surfaces 2 are used to reflect the light rays incident on the reflecting surfaces 2 to both sides of the lens body 1 along the second direction. The first direction, the second direction, and the central axis direction of the lens body 1 are perpendicular to each other.

[0070] To facilitate understanding of the various directions in this embodiment, Figures 1 to 15 The Cartesian coordinate system was used to label each direction, with arrow X pointing to the first direction, arrow Y pointing to the second direction, and arrow Z pointing to the direction of the central axis of lens body 1.

[0071] In the above embodiments, the specific form of the reflective surface 2 includes, but is not limited to, polishing the sidewall of the notch 13, or adding a material with high reflectivity to the sidewall of the notch 13, such as aluminum plating or zinc plating; the shape of the reflective surface 2 includes, but is not limited to, planar, zigzag, and arc-shaped, as long as it can reflect the light incident on the reflective surface 2 in the second direction; the shape of the sidewall of the notch 13 matches the shape of the reflective surface 2.

[0072] In an optional embodiment, the reflective surface 2 is symmetrically arranged on both sides of the inner curved surface 11 along the second direction, for example... Figure 2 and Figure 3 As shown, the reflecting surface 2 is symmetrical about the center of the inner curved surface 11.

[0073] In an optional embodiment, the reflective surface 2 includes at least two reflective sub-surfaces 21 that are continuously or spaced apart along the first direction, and the angle between the reflective sub-surfaces 21 and the first direction is larger the further away from the inner curved surface 11 they are.

[0074] In an optional embodiment, the reflective sub-surface 21 has an arcuate structure, protruding from the side where the inward curved surface 11 is located. The generatrix shape of the arcuate structure includes, but is not limited to, circular arcs, elliptical arcs, and spline curves.

[0075] In an optional embodiment, the reflecting surface 2 includes two reflecting sub-surfaces 21 with different angles, and the generatrix of the reflecting sub-surface 21 closer to the inner curved surface 11 satisfies the following function:

[0076]

[0077] In the formula, x1 and y1 represent the coordinates of any point on the reflective sub-surface 21 near the inner curved surface 11 along the first and second directions, respectively;

[0078] The generatrix of the reflecting sub-surface 21, which is far from the inner curved surface 11, satisfies the following function:

[0079]

[0080] In the formula, x2 and y2 represent the coordinates of any point on the reflective sub-surface 21 away from the inner curved surface 11 along the first and second directions, respectively.

[0081] By employing two types of reflective sub-surfaces 21 that satisfy the above function, light can not only be reflected to the second direction by the two types of reflective sub-surfaces 21 respectively, but also be first reflected by one of the reflective sub-surfaces 21 to the other reflective sub-surface 21, and then reflected a second time to the second direction, for example... Figure 6 As shown, this embodiment is able to further concentrate the light flux in the second direction.

[0082] In an optional embodiment, the length of the generatrix of the inner curved surface 11 along the first direction is X1, and the length of the generatrix of the inner curved surface 11 along the second direction is Y1, where X1 is greater than Y1, for example... Figure 6 As shown.

[0083] like Figure 8 The diagram shows the refraction of light within lens body 1, where α represents the incident angle controlled by the generatrix of the inner curved surface 11, β represents the exit angle controlled by the generatrix of the inner curved surface 11, and θ represents the exit angle controlled by the generatrix of the outer curved surface 12. It can be seen that the illumination range of the light satisfies the following relationship:

[0084]

[0085] In the formula, R represents the illumination range of the light on the diffuser plate 4; H represents the distance from the top of the lens body 1 to the diffuser plate 4; θ represents the emission angle controlled by the generatrix of the outer curved surface 12; and L represents half the length of the generatrix of the outer curved surface 12 along the first direction.

[0086] It can be concluded that the larger the exit angle of the light at the outer curved surface 12, the larger the illumination range in the corresponding direction.

[0087] like Figure 7 As shown, in order to analyze the numerical relationship between the illumination range and various angles, assume that the generatrix consists of n points, n = 1, 2, 3...; correspondingly, n beams of light are incident on the n points of the generatrix, and the incident angle of the nth beam of light at the inner curved surface 11 is denoted as α. n The exit angle at the inner curved surface 11 is denoted as β. n Let n = 1, 2, 3, ..., and introduce a function k. Let β = kα. We can find that k satisfies the following relationship:

[0088]

[0089] In the formula, k represents the functional relationship between β and α; b is a constant; n represents the number of calculated coordinates of the generatrix of the inner curved surface 11. It can be seen that the magnitude of k is positively correlated with the magnitude of b. The smaller the value of b, the smaller the value of k. Thus, the light can have a smaller β under the same α, thereby obtaining a larger illumination range. Therefore, the value of b can be used to guide the design of the generatrix of the inner curved surface 11 and is defined as the illumination range coefficient. Therefore, in an optional embodiment, the illumination range coefficient of the generatrix of the inner curved surface 11 in the first direction is b1, and the illumination range coefficient of the generatrix of the inner curved surface 11 in the second direction is b2, where b1 is greater than b2, for example, b1 is 1.5 and b2 is 1; and b1 and b2 satisfy the following formula:

[0090]

[0091] In the formula, k1 represents the functional relationship between β and α in the first direction; k2 represents the functional relationship between β and α in the second direction; b1 represents the illumination range coefficient of the generatrix of the inner surface 11 in the first direction; and b2 represents the illumination range coefficient of the generatrix of the inner surface 11 in the second direction.

[0092] In an optional embodiment, the incident angle controlled by the generatrix of the inner curved surface 11, the exit angle controlled by the generatrix of the inner curved surface 11, and the exit angle controlled by the generatrix of the outer curved surface 12 satisfy the following relationship:

[0093] β = 0.2(α + θ)

[0094] In the formula, β represents the exit angle controlled by the generatrix of the inner curved surface 11; α represents the incident angle controlled by the generatrix of the inner curved surface 11; and θ represents the exit angle controlled by the generatrix of the outer curved surface 12.

[0095] Taking the case of n=800 as an example, we can calculate k1 and k2 in the first and second directions respectively to obtain:

[0096]

[0097]

[0098] Since β = 0.2(α + θ), then θ = 5β - α = 5kα - α. We can calculate that θ in the first and second directions are 1.187α and 0.25α respectively, meaning that θ in the second direction is less than θ in the first direction. Therefore, from... It can be seen that the illumination range in the second direction is also greater than that in the first direction.

[0099] like Figure 13 The image shown is a top view of a conventional lens body 1. It is evident that it employs a rotationally symmetrical structure. For light rays entering the lens body 1 from the inner curved surface 11, regardless of the direction of propagation, the light rays are refracted and scattered to the same degree, thus uniformly and evenly illuminating the periphery of the lens body 1. However, as... Figures 1 to 5 The image shows a lens body 1 according to this embodiment. Both the inner curved surface 11 and the outer curved surface 12 of the lens body 1 adopt the non-rotationally symmetric structure described above. For light rays entering the lens body 1 from the inner curved surface 11, a portion of the light rays propagating in the first direction will be deflected in the second direction by the primary or secondary reflection of the reflecting surface 2, thereby increasing the luminous flux of the lens body 1 in the second direction. Another portion of the light rays propagating in the first direction will pass through the reflecting surface 2 and exit from the left and right sides of the lens body 1. The light rays propagating in the second direction will also obtain a smaller angle θ than the light rays propagating in the first direction under the refraction of the lens body 1, thus having a larger illumination range. That is, the light rays exiting from the upper and lower sides of the lens body 1 include refracted rays, primary reflected rays, and secondary reflected rays, while the light rays exiting from the left and right sides of the lens body 1 include refracted rays, enabling this solution to achieve the desired illumination. Figure 11 The lighting effect shown can compensate for the insufficient illumination range of the light strip 3 along its width direction when used to make the light strip 3, and reduce the waste of luminous flux caused by the partial overlap of the illumination range between two adjacent lens bodies 1. This avoids the problem of dark spots on the left and right sides of the light strip 3, or the problem of excessive brightness in the area between two adjacent lens bodies 1. In this way, it can reduce the distribution density and number of light strips 3 in the lamp, reduce the material cost and installation cost of the lamp, or improve the luminous uniformity of the lamp when the number of light strips 3 is the same.

[0100] It should be noted that the above description of light propagating along the first direction and light propagating along the second direction is only for the convenience of describing the general direction of light propagation. It does not mean that the path of light is completely parallel to the first and second directions, but there can also be an angle between them.

[0101] Example 2

[0102] like Figure 10As shown, a lighting fixture includes at least one light strip 3, on which at least two non-rotationally symmetric lenses of one embodiment 1 are disposed. The lens bodies 1 are spaced apart along the length direction of the light strip 3, and the first direction of the lens bodies 1 is disposed along the length direction of the light strip 3.

[0103] In the above embodiments, the lighting fixtures include, but are not limited to, kitchen and bathroom lights, panel lights, and table lamps.

[0104] like Figure 9 The diagram shows the relationship between the illumination range and the spacing between two adjacent lens bodies 1. The relationship between the spacing between two adjacent lens bodies 1 and θ can be deduced. Therefore, in an optional embodiment, the spacing between two adjacent lens bodies 1 satisfies the following relationship:

[0105]

[0106] In the formula, S represents the distribution spacing between two adjacent lens bodies 1; H represents the distance from the top of the lens body 1 to the diffuser plate 4; θ represents the emission angle controlled by the generatrix of the outer curved surface 12; and L represents half the length of the generatrix of the outer curved surface 12 along the first direction.

[0107] Figure 14 It is an existing kitchen and bathroom flat light, including three light strips 3 using traditional lens bodies 1, whose light emission uniformity is as follows: Figure 15 As shown; and Figure 12 This is a schematic diagram of the light emission uniformity of a lamp in this embodiment. Although it only includes one light strip 3, the light emission uniformity of the two is basically the same. Since this embodiment only needs to install one light strip 3, the installation cost of the other two light strips 3 and the consumption of materials such as aluminum substrate can be saved, thereby greatly reducing the installation and material cost of the light strip 3.

[0108] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-rotationally symmetric lens, characterized in that, include: Lens body (1), the lens body (1) includes an inner curved surface (11) and an outer curved surface (12), and notches (13) are provided on both sides of the lens body (1) along a first direction, the first direction being perpendicular to the central axis of the lens body (1); The reflective surface (2) is provided on the side wall of the notch (13) facing the inner curved surface (11). The angle between the reflective surface (2) and the first direction is greater than zero. The reflective surface (2) is used to reflect the light rays incident on the reflective surface (2) to both sides of the lens body (1) along the second direction. The second direction is perpendicular to the first direction and the central axis of the lens body (1). The reflective surface (2) includes at least two reflective sub-surfaces (21) distributed along a first direction, and the angle between the reflective sub-surfaces (21) and the first direction is larger the further away from the inner curved surface (11).

2. A non-rotationally symmetric lens according to claim 1, characterized in that, The reflective sub-surface (21) has an arc structure and protrudes towards the side where the inner curved surface (11) is located.

3. A non-rotationally symmetric lens according to claim 2, characterized in that, The reflecting surface (2) includes two reflecting sub-surfaces (21) with different angles. The generatrices of the reflecting sub-surfaces (21) closer to the inner curved surface (11) satisfy the following function: In the formula, , These represent the coordinates of any point on the reflective sub-surface (21) along the first and second directions, respectively; The generatrix of the reflecting sub-surface (21) away from the inner curved surface (11) satisfies the following function: In the formula, , These represent the coordinates of any point on the reflective sub-surface (21) along the first and second directions, respectively.

4. A non-rotationally symmetric lens according to any one of claims 1 to 3, characterized in that, The length of the generatrix of the inner curved surface (11) in the first direction is X1, and the length of the generatrix of the inner curved surface (11) in the second direction is Y1, where X1 is greater than Y1.

5. A non-rotationally symmetric lens according to claim 4, characterized in that, The irradiation range coefficient of the generatrix of the inner curved surface (11) in the first direction is: The irradiation range coefficient of the generatrix of the inner curved surface (11) in the second direction is , Greater than The irradiation range coefficient satisfies the following formula: In the formula, The emission angle represents the angle controlled by the generatrix of the inner curved surface (11); The angle of incidence represents the angle controlled by the generatrix of the inner curved surface (11); The irradiation range coefficient representing the generatrix of the inner curved surface (11) is... Desirable or ; The number of calculated coordinates for the generatrix of the inner surface (11).

6. A non-rotationally symmetric lens according to any one of claims 1 to 3, characterized in that, The incident angle controlled by the generatrix of the inner curved surface (11), the exit angle controlled by the generatrix of the inner curved surface (11), and the exit angle controlled by the generatrix of the outer curved surface (12) satisfy the following relationship: In the formula, The emission angle represents the angle controlled by the generatrix of the inner curved surface (11); The angle of incidence represents the angle controlled by the generatrix of the inner curved surface (11); The exit angle is controlled by the generatrix of the outer surface (12).

7. A non-rotationally symmetric lens according to any one of claims 1 to 3, characterized in that, The reflective surface (2) is symmetrically arranged on both sides of the inner curved surface (11) along the second direction.

8. A lighting fixture comprising at least one light strip (3), characterized in that, The light strip (3) is provided with at least two non-rotationally symmetric lenses as described in any one of claims 1 to 7, the lens bodies (1) being spaced apart along the length direction of the light strip (3), and the first direction of the lens bodies (1) being arranged along the length direction of the light strip (3).

9. A lamp according to claim 8, characterized in that, The spacing between two adjacent lens bodies (1) satisfies the following relationship: In the formula, Represents the distribution spacing between two adjacent lens bodies (1); Represents the distance from the top of the lens body (1) to the diffuser plate (4); The emission angle controlled by the generatrix of the outer curved surface (12); This represents half the length of the generatrix of the outer surface (12) along the first direction.

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