Non-rotational symmetric lens and lamp

Abstract

The invention relates to the technical field of illumination lenses, and provides a non-rotational symmetric lens and a luminaire wherein the non-rotational symmetric lens comprises a lens body, the lens body comprises an inner curved surface and an outer curved surface, notches are formed in the two sides of the lens body in the first direction, and the first direction is perpendicular to the central axis of the lens body; the side wall, facing the inner curved surface, of the notch is provided with the reflecting face, the included angle between the reflecting face and the first direction is larger than zero, the reflecting face is used for reflecting light rays emitted to the reflecting face to the lens body along the two sides of the second direction, and the second direction is perpendicular to the first direction and the central axis of the lens body. The technical problems that in the prior art, a lens body is of a rotational symmetry structure, the illumination range in the width direction of a lamp strip is small after the lens body is combined into the lamp strip, multiple lamp strips need to be combined for use, and therefore the material cost and the installation cost of a lamp are increased can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of lighting lenses, and in particular to a non-rotationally symmetrical lens and a lamp. Background Art

[0002] Lens is a structure widely used in the lighting industry, and is commonly used in various lighting fixtures, such as panel lights and kitchen and bathroom lights. The main body of an existing lens is generally a rotationally symmetrical rotating body structure, such as a round cake shape or a hemispherical shape, and a cavity for accommodating lamp beads is provided at its bottom. The side wall of the cavity is called the inner curved surface, and the outward side of the lens body is called the outer curved surface. When the lamp bead is placed in the cavity, the light emitted from the lamp bead will be refracted and scattered inside the lens body, so that the relatively concentrated light emitted by the lamp bead can be evenly dispersed around the lens body.

[0003] However, when such lens bodies are used in combination, for example, when multiple lens bodies are arranged in a row as a light strip, since the light distribution of a single lens body in all directions is basically the same, the lighting range of the light strip formed by their combination will be roughly in the shape of a long strip, that is, the lighting range along the length direction of the light strip is larger, but the lighting range along the width direction of the light strip is smaller, which may easily lead to dark spots due to insufficient luminous flux on the left and right sides of the light strip, or bright spots due to excessive luminous flux between two adjacent lens bodies. Therefore, in order to obtain a good and uniform lighting effect, it is often necessary to densely arrange multiple light strips along the width direction of the light strip to make up for the insufficient lighting range of the light strip in its width direction, but this will also lead to increased material and installation costs of the lamp. Summary of the invention

[0004] The purpose of the present invention is to overcome the technical problem that in the prior art, the lens body adopts a rotationally symmetrical structure, and after being combined into a light strip, the lighting range along the width direction of the light strip is small, and multiple light strips need to be used in combination, which will lead to increased material cost and installation cost of the lamp, and provide a non-rotationally symmetrical lens and lamp.

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

[0006] A lens body, the lens body comprising an inner curved surface and an outer curved surface, with notches arranged on both sides of the lens body along a first direction, the first direction being perpendicular to a central axis of the lens body;

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

[0008] The non-rotationally symmetric lens of the present invention is provided with notches on both sides of the lens body along the first direction, and the notches will reduce the length of the generatrix of the outer curved surface in the first direction along the first direction, so that the lens body becomes a non-rotationally symmetric structure, and a reflecting surface is provided on the notch; when light enters the lens body from the inner curved surface and propagates in the lens body in various directions, the light propagating in the second direction can be emitted from both sides of the outer curved surface along the second direction without obstruction, and is only dispersed under the refraction of the lens body, so that the two sides of the lens body along the second direction can be illuminated more evenly; and most of the light propagating in the first direction will be deflected toward the second direction under the reflection of the reflecting surface, and then emitted from both sides of the outer curved surface along the second direction, and only a small part of the light can pass through the reflecting surface and be emitted 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 the present scheme can concentrate most of the luminous 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 making the light strip, the second direction of the lens body is set along the width direction of the light strip, which can make up for the insufficient illumination range of the light strip along its width direction, and reduce the waste of luminous flux caused by partial overlap of the illumination range between two adjacent lens bodies, thereby avoiding 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, thereby reducing the distribution density and number of light strips in the lamp, reducing the material cost and installation cost of the lamp, or improving the luminous uniformity of the lamp when the number of light strips is the same.

[0010] It should be noted that the light propagating along the first direction and the light propagating along the second direction mentioned in the above content are only for the convenience of describing the approximate propagation direction of the light, and does not mean that the path of the light is completely parallel to the first direction and the second direction, but there may also be an angle.

[0011] Preferably, the reflective surface comprises at least two reflective sub-surfaces distributed along the first direction, and the angle between the reflective sub-surface and the first direction is larger the farther the reflective sub-surface is from the inner curved surface.

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

[0013] Preferably, the reflective sub-surface is a curved surface structure, and the reflective sub-surface is convex toward the side where the inner curved surface is located.

[0014] This proposal recommends one specific shape of the reflective sub-surface.

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

[0016]

[0017] Wherein, x1 and y1 represent the coordinates of any point on the reflection sub-surface along the first direction and the second direction respectively;

[0018] The generatrix of the reflection sub-surface away from the inner surface satisfies the following function:

[0019]

[0020] Wherein, x2 and y2 represent the coordinates of any point on the reflection sub-surface along the first direction and the second direction respectively.

[0021] This scheme recommends a specific functional relationship between the main lines of the two reflecting sub-surfaces when the reflecting surface includes two reflecting sub-surfaces with different angles, so that the light can not only be reflected by the two reflecting sub-surfaces to the second direction respectively, but also be first reflected by one of the reflecting sub-surfaces to the other reflecting sub-surface, and then be reflected for a second time to the second direction, so that this scheme can further concentrate the luminous flux in the second direction.

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

[0023] The present solution recommends further making the inner curved surface also a non-rotationally symmetric structure, so that the emission angle controlled by the inner curved surface generatrix in the second direction is smaller than the emission angle controlled in the first direction, thereby making the light along the second direction have a smaller emission angle at the outer curved surface and be able to propagate to a farther range; that is, the present solution can further concentrate the luminous flux in the second direction and increase the illumination range of the lens body along the second direction.

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

[0025]

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

[0027] This scheme recommends using the illumination range coefficient to guide the generatrix design of the inner curved surface; wherein, the illumination range coefficient is obtained by the inventor of the present invention through studying the relationship between the incident angle and the exit angle of the inner curved surface, and 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 scheme 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] Where 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 solution 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 the light emitted toward the outer curved surface along the first direction toward the two ends of the lens body along the second direction, thereby avoiding the situation where one end is too bright or too dark.

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

[0035] Compared with existing lamps whose lighting range is roughly in the shape of a long strip, the lens body in the lamp of this scheme adopts the non-rotationally symmetrical lens of the present invention, which can transfer a part of the luminous flux originally wasted between two adjacent lens bodies to the two sides of the lamp strip, thereby expanding the lighting range of the light strip along its width direction, and thus can reduce the number of aluminum substrates in the lamp, reduce the material cost and installation cost of the lamp while ensuring the uniformity of light, or improve the luminous uniformity of the lamp while keeping the number of light strips the same.

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

[0037]

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

[0039] This scheme recommends a specific relationship that the distribution spacing of two adjacent lens bodies should abide by. The distribution spacing that satisfies this relationship matches the illumination range of the lens body in the first direction. This can avoid bright spots caused by excessive overlap of the illumination ranges of two adjacent lens bodies, and dark spots caused by the inability to connect the illumination ranges of two adjacent lens bodies.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. The present invention provides a non-rotationally symmetrical lens, wherein notches are provided on both sides of the lens body along a first direction, so that the lens body has a non-rotationally symmetrical structure, and a reflecting surface is provided on the notch;

[0042] Most of the luminous flux incident on the lens body from the inner curved surface can be concentrated in the second direction, so that the illumination range of the lens body along the second direction is larger than the illumination range of the first direction; when making the light strip, the second direction of the lens body is set along the width direction of the light strip, which can make up for the insufficient illumination range of the light strip along its width direction and reduce the waste of luminous flux caused by the partial overlap of the illumination ranges between two adjacent lens bodies, thereby avoiding the problem of dark spots on the left and right sides of the light strip, or the area between two adjacent lens bodies being too bright, thereby reducing the distribution density and number of light strips in the lamp, reducing the material cost and installation cost of the lamp, or improving the luminous uniformity of the lamp when the number of light strips is the same.

[0043] The present invention can further set the inner curved surface as a non-rotationally symmetrical structure, so that the emission angle controlled by the inner curved surface generatrix in the second direction is smaller than the emission angle controlled in the first direction, thereby making the light along the second direction have a smaller emission angle at the outer curved surface and be able to propagate over a farther range; so that the present solution can further concentrate the luminous flux in the second direction and increase the illumination range of the lens body along the second direction.

[0044] 2. The present invention provides a lamp, which, by adopting the non-rotationally symmetrical lens of the present invention, can transfer a part of the light flux originally wasted between two adjacent lens bodies to both sides of the light strip, thereby expanding the lighting range of the light strip along its width direction, and then can reduce the number of aluminum substrates in the lamp, reduce the material cost and installation cost of the lamp while ensuring the uniformity of light, or improve the luminous uniformity of the lamp while keeping the number of light strips the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1It is a schematic diagram of the three-dimensional structure of a non-rotationally symmetrical lens of the present invention;

[0046] Figure 2 It is a schematic diagram of a top view structure of a non-rotationally symmetrical lens of the present invention;

[0047] Figure 3 It is a schematic diagram of a top view and cross-sectional structure of a non-rotationally symmetrical lens of the present invention;

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

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

[0050] Figure 6 It is a schematic diagram of a plane light-emitting optical path of a non-rotationally symmetrical lens of the present invention;

[0051] Figure 7 It is a schematic diagram of the vertical light path of a non-rotationally symmetrical lens of the present invention;

[0052] Figure 8 It is a schematic diagram of the vertical illumination range of a non-rotationally symmetrical lens of the present invention;

[0053] Fig. 9 It is a schematic diagram of the relationship between the illumination range of a non-rotationally symmetrical lens and the lens spacing of the present invention;

[0054] Fig.10 It is a schematic diagram of a top view of a lamp of the present invention;

[0055] Fig.11 It is a schematic diagram of the plane illumination range of a non-rotationally symmetrical lens of the present invention;

[0056] Fig.12 is a schematic diagram of light emission uniformity of a lamp of the present invention;

[0057] Fig.13 It is a schematic diagram of the top view and cross-sectional structure of an existing rotationally symmetrical lens;

[0058] Fig.14 It is a schematic diagram of the structure of the existing lamp from a top view;

[0059] Fig.15 It is a schematic diagram of the luminous uniformity of existing lamps;

[0060] Icon: 1-lens body; 11-inner curved surface; 12-outer curved surface; 13-notch;

[0061] 2-reflection surface; 21-reflection sub-surface; 3-light strip; 4-diffuser plate. DETAILED DESCRIPTION

[0062] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0063] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0064] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0065] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0066] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0067] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0068] Example 1

[0069] like Figures 1 to 8 As shown, a non-rotationally symmetrical lens comprises a lens body 1 and a reflecting surface 2; the lens body 1 comprises an inner curved surface 11 and an outer curved surface 12, and notches 13 are arranged on both sides of the lens body 1 along a first direction, so that the length X2 of the generatrix of the outer curved surface 12 in the first direction along the first direction is reduced and is smaller than the length Y2 of the generatrix of the outer curved surface 12 in the second direction along the second direction; reflecting surfaces 2 are arranged on the side walls of the two notches 13 facing the inner curved surface 11, and the angle between the reflecting surface 2 and the first direction is greater than zero, and the reflecting surface 2 is used to reflect the light incident on the reflecting surface 2 to both sides of the lens body 1 along the second direction, and the first direction, the second direction, and the central axis direction of the lens body 1 are perpendicular to each other.

[0070] In order to facilitate understanding of the various directions in this embodiment, Figures 1 to 15 The Cartesian coordinate system is used to mark each direction, wherein the direction indicated by the arrow X is the first direction, the direction indicated by the arrow Y is the second direction, and the direction indicated by the arrow Z is the direction where the central axis of the lens body 1 is located.

[0071] In the above embodiment, the specific form of the reflecting surface 2 includes but is not limited to polishing the side wall of the notch 13, or adding a material with a higher reflectivity to the side wall of the notch 13, such as aluminum plating or galvanizing; the shape of the reflecting surface 2 includes but is not limited to a plane, a broken line and an arc, as long as it can reflect the light incident on the reflecting surface 2 in the second direction; the shape of the side wall of the notch 13 matches the shape of the reflecting surface 2.

[0072] In an optional embodiment, the reflective surfaces 2 are 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 vertically 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 distributed or spaced apart along the first direction, and the angle between the reflective sub-surface 21 and the first direction is larger as the reflective sub-surface 21 is further away from the inner curved surface 11 .

[0074] In an optional embodiment, the reflective sub-surface 21 is a curved surface structure, and the reflective sub-surface 21 is convex toward the side where the inner curved surface 11 is located. The generatrix shape of the curved surface structure includes but is not limited to a circular arc, an elliptical arc, and a spline curve.

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

[0076]

[0077] Wherein, x1 and y1 represent the coordinates of any point on the reflective sub-surface 21 close to the inner curved surface 11 along the first direction and the second direction respectively;

[0078] The generatrix of the reflection sub-surface 21 away 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 reflection sub-surface 21 away from the inner curved surface 11 along the first direction and the second direction respectively.

[0081] By using two reflective sub-surfaces 21 satisfying the above function, the light can not only be reflected by the two reflective sub-surfaces 21 to the second direction respectively, but also be first reflected by one of the reflective sub-surfaces 21 to the other reflective sub-surface 21 and then reflected twice to the second direction, for example Figure 6 As shown, this embodiment can 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 in the first direction along the first direction is X1, and the length of the generatrix of the inner curved surface 11 in the second direction along the second direction is Y1, and X1 is greater than Y1, for example Figure 6 shown.

[0083] like Figure 8 The figure is a schematic diagram of the refraction phenomenon of light in the lens body 1, wherein 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 irradiation range of the light satisfies the following relationship:

[0084]

[0085] Wherein, 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 in the first direction along the first direction.

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

[0087] like Figure 7 As shown, in order to analyze the numerical relationship between the illumination range and each angle, it is assumed that the generatrix consists of n points, n = 1, 2, 3 ...; correspondingly, there are n beams of light respectively directed to 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 angle of incidence at the inner curved surface 11 is β n , n = 1, 2, 3..., introduce function k, set β = kα, it can be found 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 size of k is positively correlated with the size of b, and the smaller the b value, the smaller the k value, and the light can have a smaller β under the same α, thereby obtaining a larger illumination range, so the b value can be used to guide the design of the generatrix of the inner curved surface 11, and it 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, 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 irradiation range coefficient of the generatrix of the inner curved surface 11 in the first direction; b2 represents the irradiation range coefficient of the generatrix of the inner curved surface 11 in the second direction.

[0092] In an optional implementation manner, 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] Wherein, β represents the emission 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; θ represents the emission angle controlled by the generatrix of the outer curved surface 12.

[0095] Taking n=800 as an example, we calculate k1 and k2 in the first direction and the second direction respectively and get:

[0096]

[0097]

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

[0099] like Fig.13 FIG. 1 is a top view of an existing lens body 1, which shows that the lens body 1 adopts a rotationally symmetrical body of revolution structure. For the light entering the lens body 1 from the inner curved surface 11, no matter in which direction the light propagates, the light will be refracted and scattered to the same extent, thereby illuminating the surroundings of the lens body 1 evenly and in an equal range. Figures 1 to 5 The figure shows a lens body 1 of the present embodiment, and the inner curved surface 11 and the outer curved surface 12 of the lens body 1 both adopt the non-rotationally symmetrical structure as described above. For the light entering the lens body 1 from the inner curved surface 11, a part of the light propagating along the first direction will be deflected to the second direction under the primary reflection or secondary reflection of the reflecting surface 2, thereby increasing the luminous flux of the lens body 1 in the second direction, and another part of the light propagating along the first direction will pass through the reflecting surface 2 and be emitted from the left and right sides of the lens body 1; and the light propagating along the second direction will also obtain a smaller angle θ than the light propagating along the first direction under the refraction of the lens body 1, thereby having a larger illumination range; that is, the light emitted from the upper and lower sides of the lens body 1 includes refracted light, primary reflected light and secondary reflected light, and the light emitted from the left and right sides of the lens body 1 includes refracted light, so that the present scheme obtains the following Fig.11 The lighting effect shown, when used to make the light strip 3, can make up for the insufficient lighting range of the light strip 3 along its width direction, and reduce the waste of luminous flux caused by the partial overlap of the lighting range between two adjacent lens bodies 1, thereby avoiding the problem of dark spots on the left and right sides of the light strip 3, or the area between two adjacent lens bodies 1 being too bright, thereby reducing the distribution density and number of light strips 3 in the lamp, reducing the material cost and installation cost of the lamp, or improving the luminous uniformity of the lamp when the number of light strips 3 is the same.

[0100] It should be noted that the light propagating along the first direction and the light propagating along the second direction mentioned in the above content are only for the convenience of describing the approximate propagation direction of the light, and does not mean that the path of the light is completely parallel to the first direction and the second direction, but there may also be an angle.

[0101] Example 2

[0102] like Fig.10As shown, a lamp includes at least one light strip 3, on which at least two non-rotationally symmetrical lenses of Example 1 are arranged, and lens bodies 1 are distributed at intervals along the length direction of the light strip 3, and the first direction of the lens body 1 is arranged along the length direction of the light strip 3.

[0103] In the above implementation manner, the lamps include but are not limited to kitchen and bathroom lamps, panel lamps, and table lamps.

[0104] like Fig. 9 The figure shows the relationship between the illumination range and the distribution spacing of two adjacent lens bodies 1, and the relationship between the distribution spacing of two adjacent lens bodies 1 and θ can be inferred; therefore, in an optional embodiment, the distribution spacing of 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 4; θ represents the emission angle controlled by the generatrix of the outer curved surface 12; and L represents half of the length of the generatrix of the outer curved surface 12 in the first direction along the first direction.

[0107] Fig.14 It is a conventional kitchen and bathroom flat lamp, comprising three light strips 3 using a conventional lens body 1, and its light uniformity is as follows Fig.15 shown; Fig.12 It is a schematic diagram of the luminous uniformity of a lamp of the present embodiment. Although only one light strip 3 is included, the luminous uniformity of the two is basically consistent; and because only one light strip 3 needs to be installed in the present embodiment, the installation cost of the other two light strips 3 and the consumption of materials such as aluminum substrates can be saved, thereby greatly reducing the installation and material costs of the light strip 3.

[0108] The above are only 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 in the protection scope of the present invention.

Claims

1. A non-rotationally symmetric lens, characterized in that: include: A lens body (1), the lens body (1) comprising an inner curved surface (11) and an outer curved surface (12), with notches (13) being arranged 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); A reflecting surface (2), the reflecting surface (2) being arranged on the side wall of the notch (13) facing the inner curved surface (11), the angle between the reflecting surface (2) and the first direction being greater than zero, the reflecting surface (2) being used to reflect light incident on the reflecting surface (2) toward both sides of the lens body (1) along a second direction, the second direction being perpendicular to the first direction and the central axis of the lens body (1).

2. The non-rotationally symmetric lens according to claim 1, characterized in that: The reflective surface (2) comprises at least two reflective sub-surfaces (21) distributed along a first direction, and the reflective sub-surface (21) further away from the inner curved surface (11) has a larger angle with the first direction.

3. The non-rotationally symmetric lens according to claim 2, characterized in that: The reflection sub-surface (21) is a curved surface structure, and the reflection sub-surface (21) is convex toward the side where the inner curved surface (11) is located.

4. The non-rotationally symmetric lens according to claim 3, characterized in that: The reflecting surface (2) comprises two reflecting sub-surfaces (21) with different angles, and the generatrix of the reflecting sub-surface (21) close to the inner curved surface (11) satisfies the following function: In the formula, x1 and y1 represent the coordinates of any point on the reflection sub-surface (21) along the first direction and the second direction respectively; The generatrix of the reflection sub-surface (21) away from the inner curved surface (11) satisfies the following function: In the formula, x2 and y2 represent the coordinates of any point on the reflection sub-surface (21) along the first direction and the second direction respectively.

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

6. The non-rotationally symmetric lens according to claim 5, characterized in that: The irradiation range coefficient of the generatrix of the inner curved surface (11) in the first direction is b1, and the irradiation range coefficient of the generatrix of the inner curved surface (11) in the second direction is b2, b1 is greater than b2, and the irradiation range coefficient satisfies the following formula: 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); b represents the irradiation range coefficient of the generatrix of the inner curved surface (11), and b can be b1 or b2; and n represents the number of calculated coordinates of the generatrix of the inner curved surface (11).

7. The non-rotationally symmetric lens according to any one of claims 1 to 4, 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: β=0.2(α+θ) In the formula, β represents the emission 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 emission angle controlled by the generatrix of the outer curved surface (12).

8. The non-rotationally symmetric lens according to any one of claims 1 to 4, characterized in that: The reflective surfaces (2) are symmetrically arranged on both sides of the inner curved surface (11) along the second direction.

9. A lamp, comprising at least one light strip (3), characterized in that: The light strip (3) is provided with at least two non-rotationally symmetrical lenses according to any one of claims 1 to 8, 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 provided along the length direction of the light strip (3).

10. The lamp according to claim 9, characterized in that: The distribution spacing between two adjacent lens bodies (1) satisfies the following relationship: 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 (4); θ represents the emission angle controlled by the generatrix of the outer curved surface (12); L represents half of the length of the generatrix of the outer curved surface (12) in the first direction along the first direction.

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