CN207080826U - A compound total reflection LED spotlight lens - Google Patents

Abstract

The utility model discloses a kind of compound total reflection LED spotlight lens, including refraction convex lens structures, refraction total reflection refraction structure and refraction total reflection total reflection total reflection refraction structure, the refraction total reflection refraction structure and refraction total reflection total reflection total reflection refraction structure are centrosymmetric setting around the refraction convex lens structures；The convex lens structures of penetrating include the first incidence surface and the first exiting surface, the refraction total reflection refraction structure includes the second incidence surface, first fully reflecting surface and the second exiting surface, the refraction total reflection total reflection total reflection refraction structure includes the second incidence surface, the second fully reflecting surface and the second exiting surface.Overall dimensions of the present utility model are small, in light weight, and optics utilization rate is high.

Description

A compound total reflection LED spotlight lens

technical field

The utility model belongs to the technical field of LED spotlight lenses, in particular to a composite total reflection LED spotlight lens.

Background technique

The application of lighting includes ambient lighting and accent lighting. Ambient lighting provides the basic illuminance required for vision. Accent lighting improves the illuminance of key areas through spotlight design to highlight key display items. The focus design is mainly to adjust the large-angle beam of the luminous light source to a small-angle beam. There are two main schemes, optical reflector and optical lens.

For example, CN201510081535.0 discloses a design method of a LED collimator lens with double free-form surfaces, through the change of curvature of the inner surface (light incident surface) and the outer surface (light exit surface), the refraction and light collection of the convex lens is realized. CN201210550997.9 discloses a design method of an LED collimator lens, through the cooperation of three curved surfaces, the inner surface (light incident surface), the internal total reflection surface of the lens, and the light exit surface, to realize the light concentrating design. CN01805486.2 discloses another condensing lens structure, which divides the light beam of the light source into two parts, one part realizes light condensing through the double-convex lens structure in the middle part, and the other part enters light through the curved surface of the inner wall, and after total reflection inside the outer wall , the light emerges from the annular plane on the upper surface of the lens. CN201110128186.5 discloses a compact non-imaging LED collimation system. The light beam of the light source is divided into two parts, one part passes through the intermediate refraction structure, and the other part refracts to the ring position on the upper surface of the lens through the light incident surface to generate the first internal total Reflection, the second reflection occurs on the lower surface of the lens, and then exits from the circular position on the upper surface after changing the direction.

For the above-mentioned multiple concentrating lens design schemes, in order to realize the concentrating design at a small angle (50% of the beam angle is less than 15 degrees), CN201510081535.0 relies solely on the refraction scheme, the size of the lens is large, the weight is also large, and the optical efficiency is low; CN201210550997. 9 and CN01805486.2 adopt a refraction scheme and a total internal reflection scheme. Under the same size, the optical efficiency is improved compared with the simple refraction scheme; CN201110128186.5 and CN201610073520.4 realize the reduction of the lens size and height, but most of the light beam ( 70%) or more through three internal reflections to emit light, resulting in low optical efficiency. At the same time, because the LED light source has a certain size, a small part of the light emitted from different positions of the LED is not ideally emitted according to the designed optical path, and becomes invalid light, which also leads to Undesirable phenomena of stray light and glare.

Therefore, it is necessary to further improve the lens designed to achieve small-angle light concentrating, so that it can achieve small size, light weight, high optical efficiency, and effectively avoid stray light and glare.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a composite total reflection LED spotlight lens with small size, light weight, high optical efficiency, and effectively avoiding stray light and glare.

The technical scheme of the utility model is realized in the following way: a composite total reflection LED spotlight lens, including a refraction convex lens structure, a refraction-total reflection-refraction structure and a refraction-total reflection-total reflection-total reflection-refraction structure, the Both the refraction-total reflection-refraction structure and the refraction-total reflection-total reflection-total reflection-refraction structure are center-symmetrically arranged around the refraction convex lens structure;

The convex lens structure includes a first light incident surface and a first light exit surface, the refraction-total reflection-refraction structure includes a second light incident surface, a first total reflection surface and a second light exit surface, and the refraction-total reflection - The total reflection-total reflection-refraction structure includes a second light incident surface, a second total reflection surface and a second light exit surface;

The second light incident surface includes a planar portion and a curved portion connected thereto, the curved portion is connected to the first light incident surface, and the planar portion is connected to the first total reflection surface; the first total reflection surface The reflective surface is connected with the second total reflection surface, and the outer surface of the second total reflection surface is uniformly provided with prismatic protrusions, and the ridge line of the prismatic protrusions is a curve; the first light-emitting surface and the second light-emitting surface The light-emitting surfaces are located on the same plane, and the first light-emitting surface is located in the center of the first light-emitting surface;

The incident light having an included angle of 0° to 35° with the central axis of the first light incident surface is refracted by the first light incident surface, and then refracted and emitted by the first light exit surface;

The incident light having an angle of 35° to 52° with the central axis of the first light incident surface directly enters from the curved surface of the second light incident surface, and after being refracted by the second light incident surface, it is refracted to The second light-emitting surface produces the first total reflection at the second light-emitting surface, and then the prismatic protrusions that are directly reflected into the second total reflection surface and undergo the second total reflection produce the second, The third total reflection, finally refracted and emitted from the second light-emitting surface;

The incident light having an included angle of 52° to 80° with the central axis of the first light incident surface enters and refracts from the plane portion of the second light incident surface, and produces a first light on the first total reflection surface. Subtotal reflection, and then refracted and emitted through the second light-emitting surface; The light energy distribution ratio is 36±5%: 34±5%: 30±5%.

Preferably, the first light incident surface is a convex structure composed of facets.

Preferably, the first total reflection surface is an internal total reflection surface in the shape of a segmented curved surface composed of facets.

Preferably, the first light-emitting surface is a plane, and a micro-bump array is arranged on the surface.

Preferably, the second light-emitting surface is a plane mirror.

Preferably, the light energy distribution ratio of the light source beam in the refraction convex lens structure, refraction-total reflection-refraction structure and refraction-total reflection-total reflection-total reflection-refraction structure is 36%:34%:30%.

The first light-emitting surface and the second light-emitting surface form a circular bottom surface, the diameter of the circular bottom surface is 40.40±1mm, and the height of the entire lens is 11.43±1mm. The distance between the bottom surface is 5.12±0.5mm, the diameter of the first light incident surface is 10.40±0.5mm; the second light incident surface, the first total reflection surface and the second total reflection surface are symmetrically arranged on the center of the Around the circle formed by the first light incident surface, the width from the second light incident surface to the first total reflection surface is 6.21±0.05mm, and the width from the second total reflection surface to the edge is 9.30±0.05mm.

The beneficial effects of the utility model are: the utility model adopts a structure including a refraction convex lens, a refraction-total reflection-refraction structure and a refraction-total reflection-total reflection-total reflection-refraction structure. The utilization rate of optics is improved, and the second incident surface in the refraction-total reflection-refraction structure is composed of a flat part and a curved part. The design of the curved part here improves the utilization rate of optics; while the refraction-total reflection- The outer surface of the second total reflection surface of the total reflection-total reflection-refraction structure is uniformly provided with prismatic protrusions, and the ridge line of the prismatic protrusions is a curve. The incident light passes through less than 40% of the prismatic protrusion structured light, which ensures that the overall optical efficiency of the lens is higher than 80%. The utility model has small overall size, light weight and high optical utilization rate.

Description of drawings

Fig. 1 is a schematic diagram (bottom view) of a first embodiment of the overall structure of a compound total reflection LED spotlight lens of the present invention.

Fig. 2 is a sectional view of plane H-H in Fig. 1 .

Fig. 3 is a schematic diagram of an overall structure of an embodiment of a composite total reflection LED spotlight lens of the present invention.

Fig. 4 is a schematic diagram (top view) of an overall structure of an embodiment of a compound total reflection LED spotlight lens of the present invention.

Fig. 5 is a schematic diagram (side view) of an overall structure of an embodiment of a compound total reflection LED spotlight lens of the present invention.

Fig. 6 is a partially enlarged view of part B in Fig. 5 .

Fig. 7 is a partially enlarged view of part E in Fig. 5 .

Fig. 8 is an optical path diagram of all incident light rays in Embodiment 1 of a compound total reflection LED spotlight lens of the present invention.

Fig. 9 is an optical path diagram of a part of incident light rays in Embodiment 1 of a composite total reflection LED spotlight lens of the present invention (incident light rays having an angle between 0° and 35° with the central axis of the first light incident surface).

Fig. 10 is an optical path diagram of part of the incident light in Embodiment 1 of a composite total reflection LED spotlight lens of the present invention (incident light with an angle of 35° to 52° with the central axis of the first light incident surface).

Fig. 11 is an optical path diagram of part of the incident light in Embodiment 1 of a composite total reflection LED spotlight lens of the present invention (incident light with an angle of 52° to 80° with the central axis of the first light incident surface).

Fig. 12 is an optical effect diagram of a compound total reflection LED spotlight lens assembled on an LED light source according to the present invention.

Fig. 13 is a light distribution curve diagram of a composite total reflection LED spotlight lens assembled on an LED light source according to the present invention.

Fig. 13 is a light distribution curve diagram of a composite total reflection LED spotlight lens assembled on an LED light source according to the present invention.

Fig. 14 is a schematic diagram (sectional view) of the overall structure of Embodiment 2 of a compound total reflection LED spotlight lens of the present invention.

Fig. 15 is a schematic diagram (sectional view) of the overall structure of Embodiment 3 of a compound total reflection LED spotlight lens of the present invention.

The labels corresponding to the names of each part: first light incident surface-1, second light incident surface-2, flat part-21, curved part-22, first total reflection surface-3, second total reflection surface-4, second total reflection surface-4, The second light-emitting surface-5, the first light-emitting surface-6.

Detailed ways

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

Embodiment one

As shown in Figure 1-7, a compound total reflection LED spotlight lens includes a refraction convex lens structure, a refraction-total reflection-refraction structure and a refraction-total reflection-total reflection-total reflection-refraction structure, and the refraction-total reflection-refraction structure Both the reflection-refraction structure and the refraction-total reflection-total reflection-total reflection-refraction structure are center-symmetrically arranged around the refraction convex lens structure;

The convex lens structure includes a first light incident surface 1 and a first light exit surface 6, and the refraction-total reflection-refraction structure includes a second light incident surface 2, a first total reflection surface 3 and a second light exit surface 5, so The refraction-total reflection-total reflection-total reflection-refraction structure includes a second light incident surface 2, a second total reflection surface 4 and a second light exit surface 5;

The second light incident surface 2 includes a planar portion 21 and a curved portion 22 connected thereto, the planar portion is connected to the first total reflection surface, and the curved surface 22 is connected to the first light incident surface 1, where the curved portion The curved surface design more effectively improves the utilization rate of optics, and the optical efficiency is improved by 5%; the second total reflection surface 4 is connected with the first total reflection 3 surface, and the second total reflection surface 4 is on the outer surface Ridged protrusions are evenly arranged, and the ridges of the ridged protrusions are curved lines. The radius of curvature of the ridges ranges from 6 mm to 1000 mm. In this embodiment, the radius of curvature is 10 mm. According to the curvature of the ridges The light can produce different light distribution angles, and the light distribution angle produced in this embodiment is 24 degrees. In addition, the design of the prismatic protrusion structure has the advantage of being ultra-thin and short-focus, and less than 40% of all incident light passes through the prismatic protrusion structure, ensuring that the overall optical efficiency of the lens is higher than 80%. The first light-emitting surface 6 and the second light-emitting surface 5 are located on the same plane, and the first light-emitting surface is located at the center of the first light-emitting surface;

Specifically, the first light incident surface 1 is a convex structure composed of facets. The first total reflection surface 3 is an internal total reflection surface, which is in the shape of a segmented curved surface composed of face sheets, and the segmented curved surface has a light-gathering effect. The first light-emitting surface 6 is a plane, and the surface is provided with an array of micro-bumps. The second light-emitting surface is a plane mirror.

The lens product has the characteristics of small size, and its specific size is: the first light-emitting surface 6 and the second light-emitting surface 5 form a circular bottom surface, the diameter of the circular bottom surface is 40.40±1mm, and the entire lens The height is 11.43±1mm, the distance from the highest point of the first light incident surface 1 to the circular bottom surface is 5.12±0.5mm, the diameter of the first light incident surface 1 is 10.40±0.5mm; the second light incident surface 1 The light surface 2, the first total reflection surface 3 and the second total reflection surface 4 are symmetrically arranged around the circle formed by the first light incident surface 1, and the second light incident surface 2 is connected to the first total reflection surface. The width of 3 is 6.21±0.05mm, and the width from the second total reflection surface 4 to the edge is 9.30±0.05mm.

As shown in Figures 8 and 9, the incident light having an angle of 0 to 35 degrees with the central axis of the first light incident surface 1 (the light in part A in Figure 8) is refracted by the first light incident surface 1 , and then refract and exit through the first light-emitting surface 6;

As shown in FIGS. 8 and 10 , the incident light (the light in part B in FIG. 8 ) with an included angle of 35° to 52° with the central axis of the first light incident surface 1 directly passes from the second light incident surface 2 The curved surface 22 is incident, and after being refracted by the second light incident surface 2, it is refracted to the second light exit surface 5 to generate the first total reflection at the second light exit surface 5, and directly reflects to the second light exit surface 5. The second and third total reflections are generated through the prismatic protrusions of the second total reflection surface 4 in the total reflection surface 4, and finally refracted and emitted from the second light exit surface 5;

As shown in FIGS. 8 and 11 , the incident light (part C light in FIG. 8 ) with an angle of 52 degrees to 80 degrees with the central axis of the first light incident surface 1 passes through the plane of the second light incident surface 2 Part 21 is directly incident and refracted, and the first total reflection is generated on the first total reflection surface 3, and then refracted and emitted by the second light exit surface 5;

During the light irradiation process, the light energy distribution ratio of the light source beam in the refraction convex lens structure, refraction-total reflection-refraction structure and refraction-total reflection-total reflection-total reflection-refraction structure is 36±5%: 34±5%: 30±5%.

In this embodiment, the light energy distribution ratio of the light source beam in the refraction convex lens structure, refraction-total reflection-refraction structure and refraction-total reflection-total reflection-total reflection-refraction structure is 36%:34%:30%.

After the utility model is assembled above the LED light source, the LED light source adopts a 5mmx5mm patch lamp bead, the lens size of the assembly is 43mm, and the assembly height is 12mm. The optical effect achieved is shown in Figure 12. At a distance of 1 meter, the illuminance Distribution map, uniform illumination gradient, no stray light spots.

As shown in Figure 12, in the light distribution curve, the 50% light intensity angle is 13.4 degrees, and the central light intensity value: lumen value is 13.6.

The size of the lens product is adjusted according to the size of the light source and the specific assembly structure. If different fixing devices are used for installation, the width of the entire installation device will be different.

Embodiment two

As shown in FIG. 14 , the difference between this embodiment and the first embodiment is that the radius of curvature of the ridge line is 1000 mm, and the resulting light distribution angle is 12 degrees.

Embodiment three

As shown in FIG. 15 , the difference between this embodiment and Embodiments 1 and 2 is that the radius of curvature of the ridge line is 5 mm, and the resulting light distribution angle is 36 degrees.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also change and modify the above embodiment. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims (6)

1. A composite total reflection LED spotlight lens, characterized in that it includes a refraction convex lens structure, a refraction-total reflection-refraction structure and a refraction-total reflection-total reflection-total reflection-refraction structure, and the refraction-total reflection-refraction structure The refraction structure and the refraction-total-reflection-total-reflection-total-reflection-refraction structure are arranged centrally symmetrically around the refraction convex lens structure; The refraction convex lens structure includes a first light incident surface and a first light exit surface, the refraction-total reflection-refraction structure includes a second light incident surface, a first total reflection surface and a second light exit surface, and the refraction-total reflection - The total reflection-total reflection-refraction structure includes a second light incident surface, a second total reflection surface and a second light exit surface; The second light incident surface includes a planar portion and a curved portion connected thereto, the curved portion is connected to the first light incident surface, and the planar portion is connected to the first total reflection surface; the first total reflection surface The reflective surface is connected with the second total reflection surface, and the outer surface of the second total reflection surface is uniformly provided with prismatic protrusions, the ridge lines of the prismatic protrusions are curves, and the range of the radius of curvature of the ridge lines is Yes: 5mm to 1000mm; the first light-emitting surface and the second light-emitting surface are located on the same plane, and the first light-emitting surface is located in the center of the first light-emitting surface; The incident light having an included angle of 0° to 35° with the central axis of the first light incident surface is refracted by the first light incident surface, and then refracted and emitted by the first light exit surface; The incident light having an included angle of 35° to 52° with the central axis of the first light incident surface directly enters from the curved surface of the second light incident surface, and after being refracted by the curved surface of the second light incident surface, Refraction to the second light-emitting surface produces the first total reflection at the second light-emitting surface, and then directly reflects into the second total reflection surface through the prismatic protrusions of the second total reflection to generate the second and second Three times of total reflection, and finally refracted and emitted from the second light-emitting surface; The incident light with an angle of 52 degrees to 80 degrees with the central axis of the first light incident surface enters and refracts from the plane part of the second light incident surface, and produces the first total reflection on the first total reflection surface. total reflection, and then refract and exit through the second light-emitting surface; during the light irradiation process, the light source beam in the refraction convex lens structure, refraction-total reflection-refraction structure and refraction-total reflection-total reflection-total reflection-refraction structure Light energy distribution ratio 36±5%: 34±5%: 30±5%. 2. A compound total reflection LED spotlight lens as claimed in claim 1, wherein the first light incident surface is a convex structure composed of facets. 3. A compound total reflection LED spotlight lens according to claim 1, wherein the first total reflection surface is an internal total reflection surface in the form of a segmented curved surface composed of facets. 4. A composite total reflection LED spotlight lens as claimed in claim 1, wherein the first light-emitting surface is a plane, and the surface is provided with a micro bump array. 5. A composite total reflection LED spotlight lens as claimed in claim 1, wherein the second light-emitting surface is a flat mirror surface. 6. A compound total reflection LED spotlight lens as claimed in claim 1, characterized in that, the refraction convex lens structure, refraction-total reflection-refraction structure and refraction-total reflection-total reflection-total reflection-refraction structure The light energy distribution ratio of the medium light source beam is 36%: 34%: 30%.