A projection lamp lens, a light emitting module and a projection lamp

Abstract

The present invention discloses a projection lamp lens, a light-emitting module and a projection lamp, wherein the projection lamp lens is a semi-rotating body, and the side thereof close to the rotation axis is used as the bottom; the projection lamp lens comprises a lens body and a reflector arranged in sequence along the rotation axis; the bottom surface of the lens body is provided with an incident curved surface, and the side thereof away from the rotation axis is provided with a first refractive curved surface and a second refractive curved surface connected to each other, and a light outlet is provided on the side of the lens body close to the reflector; the light generated by the light source is refracted to a preset receiving surface through the first refractive curved surface, and is also refracted to the receiving surface through the second refractive curved surface, and is also emitted to the reflector through the light outlet, and is reflected to the receiving surface by the reflector. Through the design of the lens body and the reflector, the present invention can superimpose the first exit surface, the second refractive surface and the rectangular light spot projected by the reflector onto the receiving surface to produce a gradient effect.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting, and in particular to a floodlight lens, a light-emitting module and a floodlight. Background Art

[0002] A floodlight is a lamp with a higher illumination on the illuminated surface than the surrounding environment, also known as a spotlight;

[0003] In actual use, it is widely used in large-scale work sites and mines, building outlines, stadiums, overpasses, monuments, parks and flower beds, that is, large-area lighting fixtures used outdoors can be regarded as floodlights, but the projection results of today's floodlights are mostly circular light spots, and it is impossible to achieve gradual changes in light and dark, resulting in poor decorative effects. Summary of the invention

[0004] The present invention aims at solving the shortcomings of the prior art and provides a floodlight lens capable of projecting a gradient rectangular light spot.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A floodlight lens, wherein the floodlight lens is a semi-rotating body (i.e., a three-dimensional structure formed by rotating a geometric figure only half a circle), and the side close to the rotation axis is used as the bottom;

[0007] The floodlight lens comprises a lens body and a reflector which are sequentially arranged along the rotation axis;

[0008] The bottom surface of the lens body is concave in a direction away from the rotation axis to form an incident curved surface, and the incident curved surface encloses a light source cavity for placing a light source;

[0009] A first emitting surface is provided on a side of the lens body away from the rotation axis, wherein the first emitting surface includes a first refractive curved surface and a second refractive curved surface connected to each other;

[0010] The lens body is provided with a light outlet on one side close to the reflector. The present invention effectively avoids the light directed to the reflector from being refracted or internally reflected when passing through the lens body through the design of the light outlet, effectively utilizing the light generated by the light source while avoiding light color separation.

[0011] The side of the reflector close to the lens body is convex toward the direction close to the lens body to form a reflective curved surface; the light generated by the light source is refracted to a preset receiving surface through the first refractive curved surface to form a first rectangular light spot, and is also refracted to the receiving surface through the second refractive curved surface to form a second rectangular light spot, and is also emitted to the reflective curved surface through the light outlet, and is reflected by the reflective curved surface to the receiving surface to form a third rectangular light spot;

[0012] The first rectangular light spot, the second rectangular light spot and the third rectangular light spot are superimposed on the receiving surface to form a fourth rectangular light spot.

[0013] As an implementable method:

[0014] A light emitting layer is provided at the light outlet, and the light emitting layer includes an inner layer and an outer layer. The light emitted by the light source is vertically incident on the inner layer, and the light passing through the inner layer is vertically incident on the outer layer, and is emitted toward the reflective curved surface through the outer layer.

[0015] When light is incident vertically, its direction will not change. Through the design of the light emitting layer, the light source can be protected by the light emitting layer and the lens body while avoiding color separation of light.

[0016] As a possible implementation method: the light output layer and the lens body are an integrally formed structure.

[0017] As an implementation method: a second emitting surface is provided on a side of the lens body away from the reflector, and one side of the second emitting surface is connected to the bottom surface of the lens body, and the other side is connected to the first refractive curved surface;

[0018] The second emitting surface is a semicircular plane perpendicular to the rotation axis, and the center of the plane coincides with the rotation axis.

[0019] As an implementable method:

[0020] The first refractive curved surface is formed by rotating the first curve half a circle around the rotation axis, the first curve includes a first endpoint and a second endpoint, the first endpoint intersects with the second exit surface, and the first endpoint intersects with the second refractive curved surface;

[0021] The first curve is convex to a line connecting the first endpoint and the second endpoint.

[0022] As an implementable method:

[0023] The second refractive curved surface is formed by rotating the second curve half a circle around the rotation axis, and the second curve includes a second endpoint and a third endpoint;

[0024] The second curve is convex to a line connecting the second endpoint and the third endpoint.

[0025] As an implementable method:

[0026] The light source cavity is a hemisphere, and the light emitted by the light source is vertically incident on the incident curved surface.

[0027] As an implementable method:

[0028] When a point on the circumference of the second emitting surface is connected to the spherical center of the light source cavity, the angle formed by the resulting connecting line and the rotation axis is 25° to 35°;

[0029] When the first end point and the second end point are connected to the center of the sphere respectively, the angle formed is 55° to 65°;

[0030] When the second end point is connected to the center of the sphere, the resulting connecting line is perpendicular to the rotation axis;

[0031] When the second endpoint and the third endpoint are respectively connected to the center of the sphere, the angle formed is 25° to 35°.

[0032] As an implementable method:

[0033] The reflection curved surface is formed by rotating the reflection curve half a circle around the rotation axis, the reflection curve includes a fixed endpoint and a moving endpoint, the fixed endpoint is the highest point of the reflection curved surface, and the moving endpoint is the lowest point of the reflection curved surface;

[0034] The reflection curve is a curve formed by a line connecting the fixed end point and the moving end point being concave in a direction away from the lens body.

[0035] As an implementable method:

[0036] Also includes a mounting plate;

[0037] The lens body and the bottom of the reflector are mounted on the mounting plate.

[0038] The present invention further provides a light-emitting module, comprising any one of the above-mentioned floodlight lenses.

[0039] The present invention also provides a floodlight, comprising at least one of the above-mentioned light-emitting modules.

[0040] The present invention has significant technical effects due to the adoption of the above technical solution:

[0041] The present invention uses the design of the lens body and the reflector to make part of the light generated by the light source refract to the receiving surface through the first exit surface, part of the light refract to the receiving surface through the second refractive surface, and part of the light reflected to the receiving surface through the reflective curved surface, and a gradient effect is generated on the receiving surface, giving people a visual comfort. In actual use, users can use the brightness and darkness of the projected light to highlight the displayed content as needed.

[0042] The present invention provides a light outlet on the lens body, thereby effectively preventing the light directed toward the reflector from being refracted or internally reflected when passing through the lens body, making full use of the light generated by the light source while avoiding light color separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 It is a three-dimensional schematic diagram of a floodlight lens of the present invention;

[0045] Figure 2 It is a side view schematic diagram of a floodlight lens of the present invention;

[0046] Figure 3 is a schematic diagram of a first geometric figure and a second geometric figure;

[0047] Figure 4 yes Figure 1 Schematic diagram of light emission from the lens of the floodlight shown;

[0048] Figure 5 yes Figure 1 The wall illumination diagram of the floodlight lens shown;

[0049] Figure 6 yes Figure 1 Light distribution curve (polar coordinates) of the floodlight lens shown;

[0050] In the figure:

[0051] 100 is the lens body, 110 is the incident surface, 120 is the first exit surface (not shown in the figure), 121 is the first refractive surface, 122 is the second refractive surface, 130 is the second exit surface, 140 is the light emitting layer 140, 200 is the reflector, 210 is the reflective surface, 300 is the mounting plate, point b is the first endpoint, point a is the second endpoint, and point c is the third endpoint. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with embodiments. The following embodiments are for explanation of the present invention but the present invention is not limited to the following embodiments.

[0053] Embodiment 1, floodlight lens, such as Figures 1 to 6 As shown, it is a semi-rotating body. In this embodiment, the side close to the rotation axis is used as the bottom. The rotation axis is as shown in FIG. Figure 3 Shown on the y-axis.

[0054] The floodlight lens comprises a lens body 100 and a reflector 200 arranged in sequence along the rotation axis. The lens body 100 is formed by a first geometric figure rotating half a circle (180°) around the rotation axis, and the reflector 200 is formed by a second geometric figure rotating half a circle (180°) around the rotation axis. A person skilled in the art can set the interval between the lens body 100 and the reflector 200 by himself, and the interval can be greater than 0.

[0055] like Figure 1 As shown, the bottom surface of the lens body 100 is concave in a direction away from the rotation axis to form an incident curved surface 110, and the incident curved surface 110 encloses a light source cavity for placing a light source; those skilled in the art can select a suitable LED light source according to actual needs;

[0056] The side of the reflector 200 close to the lens body 100 is convex toward the direction close to the lens body 100 to form a reflective curved surface 210 . The reflective curved surface 210 is a free-form surface, and light is totally reflected on the reflective curved surface 210 .

[0057] In actual use, the floodlight lens is placed vertically, the rotation axis is parallel to the preset receiving surface, the reflector 200 is located below the lens body 100, part of the light generated by the light source is refracted to the receiving surface through the lens body 100, and part of the light is directed to the reflective curved surface 210 of the reflector 200. By designing the reflective curved surface 210 to bulge in the direction close to the lens body 100, the light is reflected to the receiving surface through the reflective curved surface 210, thereby avoiding the loss caused by this part of the light not being projected to the receiving surface and effectively utilizing the light effect.

[0058] In order to fully utilize the light effect, the existing floodlights often need to adjust their projection angles so that the downwardly divergent light can be projected onto the receiving surface. However, when the angle is adjusted, the projected light spot is often deformed. The rectangular light spot is easily deformed into a trapezoidal light spot, which cannot completely cover the area to be illuminated and has poor decorative effect. Through the design of the lens body 100 and the reflector 200, this embodiment can fully utilize the light effect without adjusting the projection angle in actual use.

[0059] Reference Figure 1 The lens body 100 is provided with a first emitting surface 120 on a side away from the rotation axis, wherein the first emitting surface 120 includes a first refractive curved surface 121 and a second refractive curved surface 122 connected to each other, and both the first refractive curved surface 121 and the second refractive curved surface 122 are free-form surfaces;

[0060] Reference Figure 4, the light generated by the light source is refracted to a preset receiving surface through the first refractive curved surface 121 to form a first rectangular light spot, and is also refracted to the receiving surface through the second refractive curved surface 122 to form a second rectangular light spot;

[0061] The light generated by the light source is also emitted toward the reflective curved surface 210 through the lens body 100, and is reflected by the reflective curved surface 210 to the receiving surface, forming a third rectangular light spot;

[0062] The first rectangular light spot, the second rectangular light spot and the third rectangular light spot are superimposed on the receiving surface to form a fourth rectangular light spot, and the fourth rectangular light spot is a light spot with uniformly decreasing brightness.

[0063] Through the design of the lens body 100 and the reflector 200, this embodiment allows part of the light generated by the light source to be refracted to the receiving surface through the first exit surface 120, part to be refracted to the receiving surface through the second refractive surface, and part to be reflected to the receiving surface through the reflective curved surface 210, which is superimposed on the receiving surface to produce a gradient effect, giving people a sense of visual comfort. In actual use, users can use the brightness and darkness of the projected light to highlight the content as needed.

[0064] For example, businesses now use floodlights to project promotional information onto the ground outside the store to attract passers-by, but the projected light spot is often circular and at a certain distance from the store, resulting in poor promotional effects. For example, a floodlight formed by the floodlight lens provided in this embodiment will form a light spot with increasing brightness from the road surface to the store entrance, which can effectively attract pedestrians to pay attention to the store and achieve better promotional effects.

[0065] Further:

[0066] The light source cavity is a hemisphere, and the light emitted by the light source is vertically incident on the incident curved surface 110 .

[0067] When light is incident vertically, its direction will not change.

[0068] In this embodiment, the incident curved surface 110 is designed to avoid refraction or reflection of light when passing through the incident curved surface 110, thereby improving the utilization rate of light and reducing the complexity of light distribution on the first exit surface 120 and the reflective curved surface 210.

[0069] Further:

[0070] A second emitting surface 130 is disposed on a side of the lens body 100 away from the reflector 200 . One side of the second emitting surface 130 is connected to the bottom surface of the lens body 100 , and the other side of the second emitting surface 130 is connected to the first refractive curved surface 121 .

[0071] The second emission surface 130 is a semicircular plane perpendicular to the rotation axis, and the center of the circle coincides with the rotation axis.

[0072] In this embodiment, the second emission surface 130 is designed to be a plane, so as to prevent the light emitted toward the second emission surface 130 from being totally reflected at the second emission surface 130 and affecting the light projection effect.

[0073] Further:

[0074] Reference Figure 3 , when a point (point b) on the circumference of the second emission surface 130 is connected to the spherical center (origin) of the light source cavity, the angle (angle α) formed by the resulting connecting line and the rotation axis is 25° to 35°;

[0075] When the angle α is too large, more light loss will occur, and when the angle α is too small, total reflection will occur. Therefore, in this embodiment, the angle is 30°;

[0076] In this embodiment, the center of the light source cavity is taken as the origin, the optical axis of the light source is taken as the x-axis, the direction from the origin to the receiving surface is taken as the positive direction of the x-axis, the rotation axis is taken as the y-axis, and the direction from the origin to the reflector 200 is taken as the negative direction of the y-axis;

[0077] The angle of the light emitted from the origin to the center of the second exit surface 130 is 90°, and the angle of the light emitted from the origin to any point on the circumference of the second exit surface 130 is 60°;

[0078] Further:

[0079] Reference Figure 3 The first refractive curved surface 121 is formed by rotating the first curve half a circle around the rotation axis, the first curve includes a first endpoint (point b) and a second endpoint (point a), the first endpoint intersects with the second exit surface 130, and the first endpoint intersects with the second refractive curved surface 122;

[0080] The first curve is convex to a line connecting the first endpoint and the second endpoint.

[0081] The first curve can be calculated based on a clipping method.

[0082] Further:

[0083] When the second end point is connected to the center of the sphere, the resulting connecting line is perpendicular to the rotation axis;

[0084] That is, the second endpoint is located on the optical axis of the light source, and the angle of the light passing through the second endpoint is 0°. Technical personnel in this field can set the distance from the second endpoint to the light source according to the required size of the floodlight lens and the size of the light source used. In this embodiment, the width of the light source is 3.5 mm, and the distance from the second endpoint to the light source is 8 cm.

[0085] When the first end point and the second end point are respectively connected to the center of the sphere, the angle (angle β) formed is 55° to 65°, and in this embodiment, the angle is 60°;

[0086] It can be seen from the above that the angle range of the light passing through the first refractive curved surface 121 and the second exit surface 130 is 0° to 90°.

[0087] Further:

[0088] Reference Figure 3 , the second refractive curved surface 122 is formed by rotating the second curve half a circle around the rotation axis, and the second curve includes a second endpoint (point a) and a third endpoint (point c);

[0089] The second curve is convex to a line connecting the second endpoint and the third endpoint.

[0090] The second curve can be obtained by calculation through the clipping method.

[0091] Further:

[0092] When the second end point and the third end point are respectively connected to the center of the sphere, the angle (angle γ) formed is 25° to 35°. When it exceeds this range, the effects of the second rectangular light spot and the third rectangular light spot will be affected;

[0093] In this embodiment, the angle is 30°.

[0094] The angle range of the light passing through the second refractive curved surface 122 and the light irradiated to the reflective curved surface 210 is 0° to -90°. In this embodiment, the angle range of the light passing through the second refractive curved surface 122 is 0° to -30°. Figure 3 As shown in the middle angle γ, the angle range of the light toward the reflective curved surface 210 is -30° to -90°. Figure 3 As shown in the middle angle δ;

[0095] For example, when the angle of the light passing through the third endpoint is -40°, the light with an angle of -35° to -40° is easily totally reflected when passing through the second refractive curved surface 122 due to the excessive divergence angle, resulting in the light being unable to be refracted or separated into different colors.

[0096] Note: A beam of white light is composed of various lights of different wavelengths, and the refractive index of lights of different wavelengths is different. Therefore, when the angle between the incident light and the normal direction of the lens is too large, it is easy to cause some wavelengths of light to be refracted, while some wavelengths of light are fully emitted internally, so that the outgoing light will lose some colors of light and cause color separation.

[0097] Further:

[0098] The reflection curved surface 210 is formed by rotating a reflection curve half a circle around a rotation axis, and the reflection curve includes a fixed endpoint and a moving endpoint, the fixed endpoint is the highest point of the reflection curved surface 210, and the moving endpoint is the lowest point of the reflection curved surface 210;

[0099] The reflection curve is a curve formed by a line connecting the fixed end point and the moving end point being concave in a direction away from the lens body 100 .

[0100] The above reflection curve can be calculated by clipping method;

[0101] The smaller the divergence angle of the light irradiating the reflective curved surface 210 (for example, the divergence angle of the light is 20° if it is -20°), the longer the distance between the fixed endpoint and the moving endpoint in the x direction. Therefore, in this embodiment, only the light with a divergence angle greater than or equal to 30° is reflected.

[0102] Furthermore, a light outlet is provided on a side of the lens body 100 close to the reflector 200 , and the light emitted by the light source is emitted toward the reflective curved surface 210 through the light outlet.

[0103] In this embodiment, the light emitting port is designed to prevent the light emitted to the reflector 200 from being refracted or internally reflected when passing through the lens body 100, thereby effectively utilizing the light generated by the light source and preventing the light from being separated into different colors.

[0104] Furthermore, a light emitting layer 140 is provided at the light emitting port, and the light emitting layer 140 includes an inner layer and an outer layer. Figure 4 As shown, the light emitted by the light source is vertically incident on the inner layer, and the light passing through the inner layer is vertically incident on the outer layer, and is emitted toward the reflective curved surface 210 through the outer layer.

[0105] In this embodiment, the light emitting layer 140 and the lens body 100 jointly protect the light source placed in the light source cavity;

[0106] Note: The light rays entering the inner layer and the outer layer are incident vertically, so the directions of the corresponding light rays will not change.

[0107] Furthermore, the light output layer 140 and the lens body 100 are an integrally formed structure.

[0108] In this embodiment, the lens body 100 and the light output layer 140 are made of PMMA structure, and the refractive index thereof is 1.49.

[0109] Part of the light emitted by the light source is vertically incident on the lens body 100 , and the remaining light is vertically incident on the light output layer 140 .

[0110] Further:

[0111] Reference Figure 2, further comprising a mounting plate 300;

[0112] The bottoms of the lens body 100 and the reflector 200 are mounted on the mounting plate 300 .

[0113] Those skilled in the art can fix the lens body 100 and the reflector 200 on the mounting plate 300 by gluing or other methods, and can also set mounting blocks on the bottom surfaces of the lens body 100 and the reflector 200, and set mounting grooves on the mounting plate 300 that correspond to the mounting blocks one by one, and fix the lens body 100 and the reflector 200 on the mounting plate 300 by cooperating with the mounting blocks and the mounting grooves;

[0114] As can be seen from the above, there are many solutions for mounting the lens body 100 and the reflector 200 on the mounting plate 300 in the art, so this embodiment does not specifically limit them.

[0115] Further:

[0116] The mounting plate 300 is provided with a first positioning strip and a second positioning strip;

[0117] The first positioning bar is used to indicate the installation position of the lens body 100;

[0118] The second positioning bar is used to indicate the installation position of the reflector 200 .

[0119] The steps for calculating the first curve, the second curve and the third curve based on the clipping method are as follows:

[0120] S100, calculate the first curve:

[0121] Presetting the angle value formed when the first end point and the second end point are respectively connected to the center of the sphere, the angle value in this embodiment is 60°;

[0122] Reference Figure 4 Since each incident light beam entering the first curve intersects with the first curve, by calculating the intersection points corresponding to each incident light beam, the corresponding curve can be generated through the intersection points.

[0123] S110, determine the angle of the incident light corresponding to the curve:

[0124] Divide the light passing through the first curve into N parts according to the angle, and determine the angle of the i-th part of the light as θ i (0≤i≤N):

[0125]

[0126] S120, calculate the unit vector of each incident light ray The calculation formula is:

[0127]

[0128] S130, calculating the incident light The unit vector of the outgoing light ray is one-to-one The calculation formula is:

[0129]

[0130] Wherein, d represents the distance between the receiving surface and the lens, which is a preset value. In this embodiment, d=1000 mm; h(i) represents the height of the i-th outgoing light ray.

[0131] The point where h=0 is the point corresponding to the initial outgoing light.

[0132] Assume that the receiving height on the receiving surface is 0 to H, H is a preset value, H is 500 mm in this embodiment, and the calculation formula of h(i) is:

[0133]

[0134] S140, calculating a first curve based on the law of refraction:

[0135] The incident light and the outgoing light satisfy the law of refraction:

[0136]

[0137] Wherein, n1 is the refractive index corresponding to the outgoing light, and n2 is the refractive index corresponding to the incident light. In this embodiment, n1=1.49, n2=1, is the unit vector in the tangent direction, which can be calculated based on the above equation

[0138] The calculation method of the i-th point on the first curve is:

[0139] Obtain the intersection point of the i-1th incident light ray and the first curve to obtain the reference point;

[0140] Get the tangent direction unit vector corresponding to the reference point to obtain the reference vector;

[0141] Construct a reference tangent line based on a reference point and a reference vector;

[0142] The intersection point of the reference tangent line and the i-th incident light ray is calculated, and the obtained intersection point is used as the i-th point on the first curve.

[0143] After the coordinates of each point in the first curve are calculated in sequence based on the above method, the center and radius of the second exit surface 130 can be determined according to the coordinates of the Nth point.

[0144] Note: The initial point (i=0) on the first curve is a preset point, which can be set by those skilled in the art according to actual conditions. In this embodiment, the point is (8,0).

[0145] The technology of generating a corresponding curve based on the coordinates of a plurality of points is an existing technology, so it will not be introduced in detail in this embodiment.

[0146] S200, calculate the second curve:

[0147] The angle values ​​formed when the second endpoint and the third endpoint are respectively connected to the center of the sphere are preset. In this embodiment, the angle value is 30°;

[0148] As above, by calculating the intersection point between the second curve and the corresponding incident light ray, the corresponding curve can be generated through the intersection point.

[0149] S210, determine the angle of the incident light corresponding to the curve:

[0150] Divide the light passing through the second curve into M parts according to the angle, and determine the angle of the jth part of the light as θ j (0≤j≤M):

[0151]

[0152] S220, calculate the unit vector of each incident light ray The calculation formula is:

[0153]

[0154] S230, calculating the incident light The unit vector of the outgoing light ray is one-to-one The calculation formula is:

[0155]

[0156] Where h(j) represents the height of the jth outgoing light ray.

[0157] Taking the point h=0 as the point corresponding to the initial outgoing light, the calculation formula of h(j) is:

[0158]

[0159] S240, calculating the second curve based on the law of refraction:

[0160] The second curve is calculated in the same manner as the first curve in step S130 , and the initial point of the second curve is the same as the initial point of the first curve.

[0161] Those skilled in the art can generate a first geometric figure constituting the lens body 100 by setting the radius corresponding to the light source cavity and the thickness of the light output layer 140 by themselves, and combining the first curve and the second curve obtained by calculation.

[0162] S300, calculate reflection curve:

[0163] The third endpoint is connected to the center of the sphere, and the angle formed by the obtained connecting line and the y-axis is preset. In this embodiment, the angle is 60°;

[0164] As above, by calculating the intersection point of the reflection curve and the corresponding incident light, the corresponding curve can be generated through the intersection point.

[0165] S310, determine the angle of the incident light corresponding to the curve:

[0166] Divide the light passing through the reflection curve into L parts according to the angle, and determine the angle of the kth light as θ k (0≤k≤L):

[0167]

[0168] S320, calculate the unit vector of each incident light beam The calculation formula is:

[0169]

[0170] S330, calculating the incident light The unit vector of the outgoing light ray is one-to-one The calculation formula is:

[0171]

[0172] Wherein, h(k) represents the height of the kth outgoing light ray.

[0173] Taking the point h=0 as the point corresponding to the initial outgoing light, the calculation formula of h(k) is:

[0174]

[0175] S340, calculating the reflection curve based on the reflection law:

[0176] The incident light and the outgoing light satisfy the law of reflection:

[0177]

[0178] The reflection curve is calculated in the manner of calculating the first curve based on the incident light and the tangent direction unit vector in the above step S130. The initial point of the reflection curve is a fixed endpoint, which is set to (0, -5) in this embodiment.

[0179] A person skilled in the art can generate a second geometric figure based on the preset thickness of the reflector 200 and the calculated reflection curve. A person skilled in the art can set the coordinates of the endpoints according to actual needs so that the generated second geometric figure does not overlap with the first geometric figure.

[0180] The lens body 100 and the corresponding reflector 200 can be obtained by rotating the obtained first geometric figure and the second geometric figure by plus or minus 90 degrees around the y-axis.

[0181] The lens obtained in this case is verified based on the ray tracing software TracePro. The specific steps are as follows:

[0182] A receiving plate with a radius of 2000mm is set as a model of the actual wall, a lens is placed 1000mm away from the wall, and the XPE-2 light source is used for simulation. The results are as follows: Figure 5 and Figure 6 shown.

[0183] Depend on Figure 5 As shown in the wall illumination diagram, the center horizontal line, i.e. the position marked by the value 0, is the ground, and the positive direction of the y-axis is the height direction of the wall. From the figure, we can see that the actual light spot after the light passes through the lens is in the shape of a rectangle, with a height of about 500mm, and the brightness decreases from the center to the left and right sides, and from the ground to the height, presenting a gradient rectangular light spot.

[0184] Since the actual light source is not equal to the point light source, the light illumination simulated by the actual light source is slightly different from the theoretical value. From the illumination diagram, it can be seen that the actual light spot is a gradient rectangular light spot of about 3000mm*700mm.

[0185] Embodiment 2: A light-emitting module, comprising the floodlight lens described in Embodiment 1.

[0186] Embodiment 3: A floodlight, comprising at least one light-emitting module as described in Embodiment 2.

[0187] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0188] It should be noted that:

[0189] The "one embodiment" or "embodiment" mentioned in the specification means that the specific features, structures or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0190] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0191] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different. Any equivalent or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. The technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A floodlight lens, characterized in that: The floodlight lens is a semi-rotating body, and the side close to the rotation axis is used as the bottom; The floodlight lens comprises a lens body and a reflector which are sequentially arranged along the rotation axis; The bottom surface of the lens body is concave in a direction away from the rotation axis to form an incident curved surface, and the incident curved surface encloses a light source cavity for placing a light source; A first emitting surface is provided on a side of the lens body away from the rotation axis, wherein the first emitting surface includes a first refractive curved surface and a second refractive curved surface connected to each other; A light outlet is provided on one side of the lens body close to the reflector; The side of the reflector close to the lens body is convex toward the lens body to form a reflective curved surface; The light generated by the light source is refracted to a preset receiving surface through the first refractive curved surface to form a first rectangular light spot, and is also refracted to the receiving surface through the second refractive curved surface to form a second rectangular light spot, and is also emitted to the reflective curved surface through the light outlet, and is reflected by the reflective curved surface to the receiving surface to form a third rectangular light spot; The first rectangular light spot, the second rectangular light spot and the third rectangular light spot are superimposed on the receiving surface to form a fourth rectangular light spot; A light emitting layer is provided at the light outlet, and the light emitting layer includes an inner layer and an outer layer. The light emitted by the light source is vertically incident on the inner layer, and the light passing through the inner layer is vertically incident on the outer layer, and is emitted toward the reflective curved surface through the outer layer.

2. The floodlight lens according to claim 1, characterized in that: The light emitting layer and the lens body are an integrally formed structure.

3. The floodlight lens according to claim 1 or 2, characterized in that: A second emitting surface is provided on a side of the lens body away from the reflector, wherein one side of the second emitting surface is connected to the bottom surface of the lens body, and the other side of the second emitting surface is connected to the first refractive curved surface; The second emitting surface is a semicircular plane perpendicular to the rotation axis, and the center of the plane coincides with the rotation axis.

4. The floodlight lens according to claim 3, characterized in that: The first refractive curved surface is formed by rotating the first curve half a circle around the rotation axis, the first curve includes a first endpoint and a second endpoint, the first endpoint intersects with the second exit surface, and the first endpoint intersects with the second refractive curved surface; The first curve is convex to a line connecting the first endpoint and the second endpoint.

5. The floodlight lens according to claim 4, characterized in that: The second refractive curved surface is formed by rotating the second curve half a circle around the rotation axis, and the second curve includes a second endpoint and a third endpoint; The second curve is convex to a line connecting the second endpoint and the third endpoint.

6. The floodlight lens according to claim 5, characterized in that: The light source cavity is a hemispherical shape; When a point on the circumference of the second emission surface is connected to the spherical center of the light source cavity, the angle formed by the resulting connecting line and the rotation axis is 25° to 35°; When the first end point and the second end point are connected to the center of the sphere respectively, the angle formed is 55° to 65°; When the second end point is connected to the center of the sphere, the resulting connecting line is perpendicular to the rotation axis; When the second endpoint and the third endpoint are respectively connected to the center of the sphere, the angle formed is 25° to 35°.

7. The floodlight lens according to claim 1 or 2, characterized in that: The reflection curved surface is formed by rotating a reflection curve half a circle around a rotation axis, wherein the reflection curve includes a fixed endpoint and a moving endpoint, wherein the fixed endpoint is the highest point of the reflection curved surface, and the moving endpoint is the lowest point of the reflection curved surface; The reflection curve is a curve formed by a line connecting the fixed end point and the moving end point being concave in a direction away from the lens body.

8. A light emitting module, characterized in that: A floodlight lens comprising the lens described in any one of claims 1 to 7.

9. A floodlight, characterized in that: The method comprises at least one lighting module according to claim 8.

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