CN106500013A - Projecting Lamp lens, light emitting module and Projecting Lamp - Google Patents

Abstract

The invention discloses a projection lamp lens, a light-emitting module and a projection lamp, wherein the projection lamp lens comprises a base and a lens main body arranged on the base; the lens body comprises an inner surface for receiving light rays and an outer surface which covers the outer part of the inner surface and is used for emitting the light rays; the positive projection of the outer surface is square, and the light received by the inner surface is refracted by the outer surface to form a square light spot on the opposite plane; the light-emitting surface of the outer surface is formed by splicing optical curves with equal-angle sections, and the distance from a boundary point of a light spot formed by emergent light on the outer surface to the center point of the light spot is taken as an energy distribution standard by the sections; the forward projection of base is fillet square, and the lens main part is connected to the one end of base, and the other end is provided with the installation component of connecting external installation mechanism. According to the projection lamp lens, the light emitting module and the projection lamp, the emergent light spot is a square light spot, the illumination uniformity is more than 0.85, and the projection lamp lens, the light emitting module and the projection lamp are stable and simple in structure and convenient to install.

Description

Floodlight lens, light emitting module and floodlight

technical field

The invention relates to the field of optical technology, in particular to a floodlight lens, a light emitting module and a floodlight.

Background technique

Flood lights refer to lamps that make the illuminance on the illuminated surface higher than that of the surrounding environment. Generally, it can be aimed in any direction and has a structure that is not affected by climatic conditions. It is currently widely used in large-area worksites and mines, building outlines, stadiums, overpasses, monuments, parks and flower beds, etc. Therefore, almost all large-area lighting fixtures used outdoors can be regarded as floodlights.

Ordinary light sources facing the wall will get a circular light spot with a bright center and dark surroundings. If you want to get a uniform square light spot, you must carry out effective secondary light distribution for the light source, that is, design a light source lens or reflective cup. The traditional design method is to add prism-shaped decorative panels around the light source to perform simple light distribution and form a square spot. The spot illumination distribution formed by this design method is not uniform, the boundary is not clear, and it is difficult to achieve the required light distribution, especially in the light-emitting advertising lighting, the realization of a square spot with high uniformity has always been a problem to be solved in the field.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a floodlight lens, an optical module having the floodlight lens, and a floodlight, which can realize a highly uniform square light spot.

The projection lamp lens provided by the present invention includes a base and a lens body arranged on the base;

The lens body includes an inner surface for receiving light, and an outer surface covering the inner surface for emitting light;

The forward projection of the outer surface is square, and the light received by the inner surface is refracted by the outer surface to form a square spot on the plane facing it;

The light emitting surface of the outer surface is spliced by optical curves of equiangular sections, and the section takes the distance from the boundary point of the light spot formed by the outgoing light on the outer surface to the center point of the light spot as the energy distribution standard;

The forward projection of the base is a square with rounded corners, one end of the base is connected to the lens body, and the other end is provided with a mounting assembly connected to an external mounting mechanism.

As an implementable manner, the optical curve satisfies the following equation:

Among them, ro is the value of the lens when θ=θ _min , θ is the angle between the incident light and the light output direction of the center of the light source, θ _min is the minimum angle between the incident light and the light output direction of the light source center, γ(θ) is the angle between the outgoing light and the light source The included angle of the central light-emitting direction, n is the refractive index of the lens.

As a possible implementation manner, the outer surface includes a first curved surface and a second curved surface connected to each other;

The first curved surface is the light-emitting surface of the outer surface;

The second curved surface is a diffuse reflection curved surface, vertically arranged on the periphery of the first curved surface, and connected to the base.

As a possible implementation manner, the inner surface is a hemispherical surface with the center of the light source as the center.

As a possible implementation manner, a cavity for accommodating a light source is formed between the inner surface and the base.

As a possible implementation, the base includes a mounting plate and a boss on the mounting plate;

The boss is a hollow cube with rounded corners;

The mounting plate has a rounded cube structure, and the mounting assembly is arranged on the mounting plate.

As a possible implementation manner, the surface material of the boss and the mounting plate is a frosted material.

The light-emitting module provided by the present invention includes a light source and the above-mentioned projector lens;

The light source is arranged on the base, and the light emitted by the light source is received by the inner surface of the lens body and emitted from the outer surface of the lens body.

The floodlight provided by the present invention includes an array composed of a plurality of light emitting modules.

The beneficial effect of the present invention compared with prior art is:

The projection lamp lens provided by the present invention is realized by a base and a lens body integrally formed with the base and arranged on the base. Among them, the forward projection of the outer surface of the lens body is square, and the light received by the inner surface forms a square spot on the plane facing it after being refracted by the outer surface; The optical curves of the sections are spliced together, and the distance from the boundary point of the spot formed by the light emitted from the outer surface of the section to the center point of the spot is used as the energy distribution standard, so that the illuminance of each section is uniform. The base adopts a double-layer structure, and its shape is adapted to the shape of the lens body. Its forward projection is a rounded square. On the one hand, it does not affect the formation of the square spot, and on the other hand, it facilitates the installation and fixing of the lens body.

The floodlight lens, light-emitting module and exit light spot of the floodlight provided by the present invention meet the requirements of the boundary shape of the square spot, and can achieve an illuminance uniformity of more than 0.85, and the structure is stable, simple, and easy to install.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the projection lamp lens provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic diagram of the three-dimensional structure of the projection lamp lens provided by Embodiment 2 of the present invention;

Fig. 3 is a schematic diagram of another three-dimensional structure of the floodlight lens shown in Fig. 1;

Fig. 4 is a schematic diagram of another three-dimensional structure of the floodlight lens shown in Fig. 1;

Fig. 5 is an illuminance distribution diagram of the light-emitting module provided by Embodiment 3 of the present invention;

Fig. 6 is a light intensity distribution diagram of two sections of the light emitting module provided by Embodiment 3 of the present invention;

Fig. 7 is a schematic diagram of the installation structure of the floodlight provided by Embodiment 4 of the present invention.

detailed description

The above and other technical features and advantages of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

Please refer to FIG. 1 to FIG. 4 , the floodlight lens provided by Embodiment 1 of the present invention includes a base and a lens body disposed on the base.

Wherein, the base and the lens body are integrally formed, and the structure is stable. The lens body includes an inner surface (not shown) for receiving light, and an outer surface covering the inner surface for emitting light. The inner surface is a hemispherical surface with the center of the light source as the center of the sphere, and is mainly used to form a cavity with the base to accommodate the light source to receive the energy emitted by the light source. As shown in Figure 1, the outer surface includes a first curved surface 100 and a second curved surface 200 connected to each other, the first curved surface 100 is the light-emitting surface of the outer surface, and the second curved surface 200 is a diffuse reflection curved surface, which is vertically arranged on the first curved surface 100 the periphery, connect the base. The forward projection of the base is a square with rounded corners, one end of the base is connected to the lens body, and the other end is provided with a mounting component connected to an external mounting mechanism.

Specifically, the forward projection of the outer surface is square, and the light received by the inner surface is refracted by the outer surface to form a square light spot on the plane facing it. The optical curves are spliced, and the distance from the boundary point of the light spot formed by the outgoing light on the surface of the section to the center point of the light spot is used as the energy distribution standard to achieve uniform distribution of illumination.

The above optical curve satisfies the following equation:

Among them, ro is the value of the lens when θ=θ _min , θ is the angle between the incident light and the light output direction of the center of the light source, θ _min is the minimum angle between the incident light and the light output direction of the light source center, γ(θ) is the angle between the outgoing light and the light source The included angle of the central light-emitting direction, n is the refractive index of the lens. The optical curves of the corresponding sections can be obtained by connecting the solutions obtained by the above formulas with smooth curves. Finally, the equiangular sections are spliced together to obtain a smooth curved surface, that is, the first curved surface 100 .

As a possible implementation mode, as shown in FIG. 2 , the first curved surface 100 of the floodlight lens provided by Embodiment 2 of the present invention is divided into four equiangular sections, respectively 110 , 120 , 130 , and 140 . The optical curve of each section can be obtained by the above formula. The first curved surface 100 can also be divided into 6, 8, and other equal-angle sections. By using the distance from the boundary point of the light spot to the origin as the uniform illumination area to be realized for each optical section, the distance between the boundary point of the light spot and the origin The maximum value of the distance from the origin of the spot center is used as the standard for the energy distribution of each section, and the illuminance value of the overall target surface can be determined. By solving the optical curve corresponding to each section and splicing the curves of each section into an overall smooth surface, a square high-uniformity spot can be realized.

Due to the particularity of the structure of the lens body provided by the present invention, it is difficult to meet an installation substrate that completely matches its structure, so it is not convenient to install directly; moreover, once the installation is not in place, it is prone to light leakage and other phenomena, which will affect the outgoing light spot shape and illuminance uniformity.

To overcome the above problems, as shown in FIG. 1 , FIG. 3 and FIG. 4 , the base provided by the present invention is integrally formed with the lens body, and the base includes a mounting plate 400 and a boss 300 on the mounting plate 400 . The boss 300 is a transitional structure arranged between the lens body and the mounting plate. Its shape corresponds to the shape of the butt surface of the lens body. It is a hollow cube with rounded corners.

The mounting plate 400 is a cube with rounded corners, and is mainly used for docking with an external mounting structure. There are two cylindrical feet at the bottom for fixing.

The base and the lens body are integrally formed. This structural setting makes it easy to realize docking installation between the base and the external installation structure, which is convenient to operate and does not affect the shape of the outgoing light spot and the uniformity of illumination.

Furthermore, the surface materials of the second curved surface 200 , the boss 300 and the mounting plate 400 are frosted materials, which further improves the uniformity of the overall illumination.

Based on the same inventive concept, Embodiment 3 of the present invention further provides a light emitting module, including a light source and the projection lamp lens in the above embodiment. The light source can be an LED light or other point light sources. The light emitted by the light source is received by the inner surface of the lens body, and then emitted from the outer surface of the lens body to form a square spot with uniform illumination. The illuminance distribution and light intensity distribution of the spot are shown in Figure 5 and Figure 6.

Based on the same inventive concept, referring to FIG. 7 , Embodiment 4 of the present invention also provides a floodlight, which includes an array composed of a plurality of the above-mentioned light emitting modules. When installing, you only need to fix the base of each floodlight lens to the corresponding position to form an array, which can realize large-area lighting, and is especially suitable for outdoor lighting such as advertisements.

The floodlight lens, light-emitting module and exit light spot of the floodlight provided by the present invention meet the requirements of the boundary shape of the square spot, and can achieve an illuminance uniformity of more than 0.85, and the structure is stable, simple, and easy to install.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the protection scope of the present invention. . In particular, for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A floodlight lens, characterized in that it comprises a base and a lens body arranged on the base; The lens body includes an inner surface for receiving light, and an outer surface covering the inner surface for emitting light; The forward projection of the outer surface is square, and the light received by the inner surface is refracted by the outer surface to form a square spot on the plane facing it; The light-emitting surface of the outer surface is spliced by optical curves of equiangular sections, and the section uses the distance from the boundary point of the light spot formed by the outgoing light on the outer surface to the center point of the light spot as the energy distribution standard; The forward projection of the base is a square with rounded corners, one end of the base is connected to the lens body, and the other end is provided with a mounting assembly connected to an external mounting mechanism. 2. The projector lens according to claim 1, wherein the optical curve satisfies the following equation: Among them, ro is the value of the lens when θ=θ _min , θ is the angle between the incident light and the light output direction of the center of the light source, θ _min is the minimum angle between the incident light and the light output direction of the light source center, γ(θ) is the angle between the outgoing light and the light source The included angle of the central light-emitting direction, n is the refractive index of the lens. 3. The projector lens according to claim 1, wherein the outer surface comprises a first curved surface and a second curved surface connected to each other; The first curved surface is the light-emitting surface of the outer surface; The second curved surface is a diffuse reflection curved surface, vertically arranged on the periphery of the first curved surface, and connected to the base. 4. The floodlight lens according to claim 1, wherein the inner surface is a hemispherical surface with the center of the light source as the center of the sphere. 5. The projection lamp lens according to claim 1, wherein a cavity for accommodating a light source is formed between the inner surface and the base. 6. The spotlight lens according to any one of claims 3 to 5, wherein the base includes a mounting plate and a boss on the mounting plate; The boss is a hollow cube with rounded corners; The mounting plate has a rounded cube structure, and the mounting assembly is arranged on the mounting plate. 7. The floodlight lens according to claim 6, characterized in that, the surface material of the boss and the mounting plate is a frosted material. 8. A lighting module, characterized in that it comprises a light source and the projection lamp lens according to any one of claims 1-7; The light source is arranged on the base, and the light emitted by the light source is received by the inner surface of the lens body and emitted from the outer surface of the lens body. 9. A floodlight, characterized by comprising an array composed of a plurality of light emitting modules according to claim 8.