CN215982375U - Lens, lamp and optical system - Google Patents

Abstract

The utility model relates to the technical field of illumination, in particular to a lens, a lamp and an optical system. A lens including a rotating body having an incident region at a rear end and an exit region at a front end, an outer sidewall between the incident region and the exit region forming a reflection region; the reflection area comprises a first reflection area and a second reflection area, and the second reflection area is positioned at the periphery of the first reflection area; the second reflection area is provided with a plurality of reflection units; the incident region comprises an incident port and an incident side surface formed by sinking from the incident port along the direction from the rear end to the front end; the incident side surface is provided with a plurality of ribs, and each rib extends along the direction from the rear end to the front end. After the light enters the lens from the incident side surface, the light is crossed before reaching the second reflecting surface, so that the incident angle of partial light on the second reflecting surface is increased, and the beam angle is increased after the partial light is reflected by the convex edge of the reflecting surface area.

Description

Lens, lamp and optical system

Technical Field

The utility model relates to the technical field of illumination, in particular to a lens, a lamp and an optical system.

Background

The LED lamp has a good energy-saving effect, is more and more applied to various lighting scenes, and is more and more applied in the field of motor vehicle lighting. However, due to the characteristics of the point light source, the LED light source needs to be matched with a light conversion device such as a lens, and each side surface of the lens is used as a reflection surface or a refraction surface to reflect or refract light, so as to realize light distribution of the point light source and obtain light spots with parameters such as beam angle and uniformity meeting the requirements of an application scene.

In the total reflection lens, in order to ensure uniformity of a light spot under a certain beam angle, a rib having two reflecting surfaces is generally disposed in a total reflecting surface region, and as shown in fig. 1 and 2, light is reflected by the two reflecting surfaces and then exits from an exit surface of the lens. Chinese patent CN205535602U discloses a lens, a lighting fixture and a vehicle distance light illumination optical system, which adopts the above scheme to make the beam angle smaller and the light spot uniform, and is suitable for vehicle distance light illumination. In some lighting scenarios, however, it is desirable to adjust the beam angle while maintaining spot uniformity. The curvature of two reflecting surfaces in the reflecting surface ridge is usually adjusted. However, the reflecting surface area and the reflecting surface are both curved surfaces, the curvature of the reflecting surface area is gradually changed, and the precision requirement of the reflecting surface area on a mold is high during actual processing, so that the production yield is greatly reduced. This approach makes it difficult to meet lens products with different beam angle requirements.

Therefore, there is a need for a total reflection lens with uniform light spot, easy adjustment of beam angle, and easy processing.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: aiming at the problems that the curved surface of the convex edge is difficult to adjust, the precision requirement is high and the processing difficulty is high in the prior art, the convex edge is arranged on the incident side surface of the total reflection lens, so that light rays enter the lens from the incident side surface and then cross before reaching the second reflecting surface, the incident angle of partial light rays on the second reflecting surface is increased, and the light spots are increased after being reflected by the convex edge in the reflecting surface area, the light beam angle is increased, and the uniformity of the light spots is kept. The convex edge curved surface parameters of the reflecting surface area do not need to be adjusted, so that the precision requirement and the processing difficulty of the die are greatly reduced.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a lens comprising a rotating body having an incident area at a rear end and an exit area at a front end, an outer sidewall between the incident area and the exit area forming a reflective area; the reflection area comprises a first reflection area and a second reflection area, and the second reflection area is positioned at the periphery of the first reflection area; the second reflection area is provided with a plurality of reflection units;

the incident region comprises an incident port and an incident side surface formed by sinking from the incident port along the direction from the rear end to the front end; the incident side surface is provided with a plurality of ribs, and each rib extends along the direction from the rear end to the front end.

Through setting up the bead at the incident side in incident area, light from the incident surface after penetrating, partial light has alternately before reaching the second plane of reflection for shine the light incident angle of reflection unit on the second plane of reflection and increase, because the incident angle increases, through reflection unit transmission back, light is more dispersed, and has still kept even nature. In different products, when the beam angle needs to be adjusted, only the distribution density of the convex ribs in the incident area needs to be adjusted, and the reflection unit with higher precision requirement does not need to be adjusted. Greatly reducing the precision requirement on the die and reducing the processing difficulty.

As a preferable aspect of the present invention, the ribs are uniformly distributed along a circumferential direction of the incident side surface.

As a preferable scheme of the utility model, the tops of the convex ridges are smoothly transited.

As a preferred aspect of the present invention, there is a smooth transition between adjacent ribs.

Smooth transition between make light distribute more for even behind the bead through circumference distribution, bead top and bead, can promote the homogeneity of facula.

As a preferable aspect of the present invention, a third reflection region is provided between the first reflection region and the second reflection region.

As a preferable aspect of the present invention, the third reflection region is provided with a plurality of reflection units.

As a preferable aspect of the present invention, the reflection unit includes a first reflection surface and a second reflection surface, and an intersection where the first reflection surface and the second reflection surface intersect is an intersection line; making a tangent line of the intersecting line by passing through any point Q of the intersecting line, and respectively intersecting a virtual plane passing through the point Q and perpendicular to the tangent line with the first reflecting surface and the second reflecting surface to form a line I and a line II;

the first line is a curve or a straight line, and the second line is a curve or a straight line.

In both curved and straight line cases, reflection of light can be achieved. The deflection angle of the light after passing through the reflecting unit can be adjusted by adjusting the included angle and the line type of the first line and the second line of the curve, and further the uniformity of the beam angle and the light spot is adjusted.

As a preferable aspect of the present invention, the first line and the second line are straight lines, and the first line is substantially perpendicular to the second line.

By substantially perpendicular to line one and line two, it is meant that the angle between line one and line two is 90 degrees or close to 90 degrees. When the virtual surface is made at different points on the intersecting line to obtain different first and second lines, the included angle is slightly changed, but is basically between 88 degrees and 92 degrees, the included angle close to 90 degrees enables the die design and processing to be more convenient, and the yield in the processing process is improved.

The utility model also provides a lamp comprising the lens.

The utility model also provides an optical system comprising the lens.

When the lens is used for a lamp and an optical system, the requirement of the lamp or the optical system on the precision of the optical lens can be greatly reduced, and especially the requirement on the precision of a reflecting unit is reduced. In this case, the lens adopting the scheme is used as a light distribution lens, so that the manufacturing difficulty and cost of the lamp or the optical system can be greatly reduced.

The lamp has the beneficial effects that:

1. according to the lens, the convex ribs are arranged in the incidence area to serve as the optical microstructures, the light is distributed more uniformly after passing through the convex ribs due to the circumferential distribution and the smooth transition between the tops of the convex ribs and the convex ribs, and the uniformity of light spots can be improved. After the light passes through the rib structure, the light deflects before reaching the reflecting unit of the second reflecting surface, and a cross phenomenon exists. The incident angle of the light irradiated to the reflecting unit on the second reflecting surface is increased, and the light is more dispersed and still maintains uniform property after being emitted by the reflecting unit due to the increase of the incident angle. When the beam angle needs to be adjusted, only the distribution density of the convex ribs of the incidence area needs to be adjusted, and the reflection unit with higher precision requirement does not need to be adjusted. Greatly reducing the precision requirement on the die and reducing the processing difficulty.

2. According to the lens, the first line and the second line of each cross section in the reflecting unit are basically perpendicular to each other, so that light rays passing through the reflecting unit are basically reflected in opposite directions, although the light rays are not or slightly diffused at the reflecting unit, the mutually perpendicular arrangement mode greatly reduces the requirement on the precision of a mold, and the yield is improved. When the lens is used for a lamp and an optical system, the requirement of the lamp or the optical system on the precision of the optical lens can be greatly reduced, and especially the requirement on the precision of a reflecting unit is reduced.

Drawings

Fig. 1 is a schematic diagram of a lens with a ribbed total reflection area in the prior art.

Fig. 2 is a schematic optical path diagram of the lens of fig. 1.

Fig. 3 is a schematic view of the structure of the lens of the present invention.

Fig. 4 is a schematic view of another angle of view structure of the lens of the present invention.

Fig. 5 is an enlarged schematic view of fig. 4 at circle O.

Fig. 6 is an enlarged schematic view of fig. 5 at circle P.

Fig. 7 is an enlarged view schematically shown in circle H of fig. 4.

Fig. 8 is a schematic top view of a lens of the present invention.

Fig. 9 is a schematic cross-sectional view at a-a of fig. 8.

Fig. 10 is a schematic illustration of the light path from the perspective of fig. 9.

Fig. 11 is a schematic front view of a lens of the present invention.

Fig. 12 is a schematic view of the optical path in the sectional view B-B in fig. 11.

Fig. 13 is a schematic view showing the positional relationship of the intersecting line, the tangent line and the sectional plane.

Fig. 14 is a schematic diagram of the optical path of light rays at the reflection unit.

Fig. 15 is a schematic diagram of the optical path of light rays at the reflection unit according to another embodiment.

Fig. 16 is a schematic structural view of a lens in embodiment 2.

Fig. 17 is a sectional view schematically showing the lens in example 2.

Fig. 18 is a schematic diagram showing the distribution of the optical path of the lens in which the projection is not provided in the incident region.

Fig. 19 is a schematic diagram of the optical path distribution of the lens in embodiment 2.

Reference numerals:

1-the incident side; 11-ribs; 111-fin one; 112-rib two; 1111-a rib surface I; 1112-rib surface two; 1121-convex ridge surface three; 2-an exit area; 3-a first reflective area; 4-a second reflective area; 5-a reflection unit; 51-a first reflective surface; 52-a second reflective surface; 53-intersecting line; 511-line one; 521-line two; 6-third reflection area.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Example 1

A lens, as shown in fig. 3 and 4, comprising a rotating body having an incident region at a rear end and an exit region 2 at a front end, an outer sidewall between the incident region and the exit region 2 forming a reflection region; the reflection area comprises a first reflection area 3 and a second reflection area 4, and the second reflection area 4 is positioned at the periphery of the first reflection area 3; the second reflection area 4 is provided with a plurality of reflection units 5; in the lens of this embodiment, the edge of the exit area further includes an edge for assembling with other components and a card slot.

The incidence region comprises an incidence port and an incidence side surface 1 formed by sinking from the incidence port along the direction from the rear end to the front end; the incident side surface 1 is provided with a plurality of ribs 11, and each rib 11 extends along the direction from the rear end to the front end. As shown in fig. 4, the reflection unit 5 extends in a direction from the incident region to the exit region, and has a gradually enlarged cross section.

As shown in fig. 5, the ribs are uniformly distributed along the circumferential direction of the incident side surface 1. The tops of the convex ribs 11 are smoothly transited. The adjacent convex ribs 11 are smoothly transited. Specifically, as shown in fig. 6, the rib 11 includes a first rib 111 and a second rib 112 adjacent to each other; the first rib 111 is formed by a first rib surface 1111 and a second rib surface 1112; the joint of the first rib surface 1111 and the second rib surface 1112 is in smooth transition; the second rib 112 is composed of a third rib surface 1121 and a fourth rib surface, wherein the third rib surface 1121 is connected with the second rib surface 1112, and the connection part of the second rib surface 1112 and the third rib surface 1121 is in smooth transition. Smooth transition between 11 tops of bead and bead through circumference distribution makes light distribute more evenly behind bead 11, can promote the homogeneity of facula.

As shown in fig. 7, the reflection unit 5 includes a first reflection surface 51 and a second reflection surface 52, and an intersection line 53 is formed at an intersection of the first reflection surface 51 and the second reflection surface 52.

As shown in fig. 8 and 9, in the present embodiment, incident-side surface 1 has a cylindrical shape with a large top and a small bottom, and ribs 11 are provided in the same number at the upper end (entrance port) of incident-side surface 1 and the lower end of incident-side surface 1. That is, each rib 11 extends from bottom to top, and the cross section is gradually enlarged. The light path in cross section is shown in fig. 10. Described at the observation angle of fig. 10, the light rays are not only reflected and refracted in the vertical direction as shown in fig. 10. Also refraction in the horizontal direction occurs at the ridges, and reflection in the horizontal direction occurs at the reflection unit 5. The schematic is shown in fig. 11 and 12.

The angle between the first reflective surface 51 and the second reflective surface 52 is particularly important for the distribution of light. Because the joint of the two reflecting surfaces is the intersecting line 53, a point on the intersecting line 53 is usually taken, a tangent line of the intersecting line 53 is made through the point, and then a plane is made through the point, so that the tangent line is perpendicular to the plane; the plane intersects the two reflecting surfaces to form two line segments, and the two line segments and points on the arc line form an included angle which is used for describing the included angle of the reflecting surfaces. The angle does not have to be the same size when different points are taken on the arc.

Specifically, as shown in fig. 13, a tangent of the intersecting line 53 is defined as any point Q that passes through the intersecting line 53, and a virtual plane that passes through the point Q and is perpendicular to the tangent intersects the first reflecting surface 51 and the second reflecting surface 52 to form a line i 511 and a line ii 521, respectively; the first line 511 is a curved line or a straight line, and the second line 521 is a curved line or a straight line.

The curve case is shown in fig. 15, and the straight line case is shown in fig. 14. In both curved and straight line cases, reflection of light can be achieved. The deflection angle of the light after passing through the reflection unit 5 can be adjusted by adjusting the included angle and the line shape of the first line 511 and the second line 521 of the curve, so that the beam angle and the uniformity of the light spots are adjusted.

In both schemes, it is more preferable that, as shown in fig. 14, the first line 511 and the second line 521 are straight lines, and the first line 511 is substantially perpendicular to the second line 521. Substantially perpendicular to line one 511 and line two 521 means that the angle α between line one 511 and line two 521 is 90 degrees or close to 90 degrees. When different lines I511 and II 521 are obtained by making virtual surfaces at different points on the intersecting line 53, the included angle is slightly changed, but is basically between 88 degrees and 92 degrees, and the included angle close to 90 degrees enables the die design and processing to be more convenient, and the yield in the processing process is improved.

The arrangement in which the first line 511 and the second line 521 are substantially perpendicular achieves the minimum beam angle of the lens without providing the incidence area rib, and the processing arrangement is the simplest. And then the incident area convex edge which is convenient to process is reused, and the increase of the beam angle is realized.

Example 2

The present embodiment differs from embodiment 1 in that a third reflection region 6 is provided between the first reflection region 3 and the second reflection region 4, as shown in fig. 16 and 17. Fig. 18 is a schematic diagram of the optical path of the incident area without the rib, and fig. 19 is a schematic diagram of the optical path of the incident area with the rib in the present embodiment. In contrast, according to the embodiment, under the same incident beam condition, after passing through the lens, the light beams are cross-amplified inside the lens, and then reflected by the reflection unit 5, the light beams emitted from the exit area have wider distribution and remain uniform, and the beam angle is larger.

In a further aspect, a plurality of reflection units may be further disposed in the third reflection area 6. The reflecting unit may be arranged in the same manner as the reflecting unit 5 of the second reflecting area 4, or may be different from the reflecting unit 5 of the second reflecting area.

Example 3

A luminaire comprising the lens described in embodiment 1 or embodiment 2.

Example 4

An optical system comprising the lens described in embodiment 1 or embodiment 2. The optical system is particularly suitable for a high beam lighting optical system of a motor vehicle, and on the basis of the minimum beam angle, the mode that the convex edge is arranged in the incident area is adopted, so that the beam angle is conveniently adjusted and increased, and the product quality and batch consistency are greatly improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A lens comprising a rotating body having an entrance area at a rear end and an exit area (2) at a front end, an outer sidewall between the entrance area and the exit area (2) forming a reflective area; the reflection area comprises a first reflection area (3) and a second reflection area (4), and the second reflection area (4) is positioned at the periphery of the first reflection area (3); the second reflection area (4) is provided with a plurality of reflection units (5); it is characterized in that the preparation method is characterized in that,

the incidence region comprises an incidence port and an incidence side surface (1) which is formed by sinking from the incidence port along the direction from the rear end to the front end;

the incident side surface (1) is provided with a plurality of ribs (11), and each rib (11) extends along the direction from the rear end to the front end.

2. Lens according to claim 1, characterized in that said ridges are evenly distributed along the circumference of said entry side (1).

3. The lens of claim 1 wherein the ridge top transitions smoothly.

4. The lens of claim 1, wherein adjacent ridges transition smoothly.

5. Lens according to claim 1, characterized in that a third reflecting area (6) is provided between the first reflecting area (3) and the second reflecting area (4).

6. Lens according to claim 5, characterized in that the third reflecting area (6) is provided with several reflecting units.

7. The lens according to any of the claims 1 to 6, characterized in that said reflecting unit (5) comprises a first reflecting surface (51) and a second reflecting surface (52), said first reflecting surface (51) and said second reflecting surface (52) intersecting at an intersection line (53); making a tangent of the intersecting line (53) through any point Q of the intersecting line (53), wherein a virtual plane passing through the point Q and perpendicular to the tangent is respectively intersected with the first reflecting surface (51) and the second reflecting surface (52) to form a line I (511) and a line II (521);

the first line (511) is a curved line or a straight line, and the second line (521) is a curved line or a straight line.

8. The lens of claim 7, wherein said line one (511) and said line two (521) are straight lines, said line one (511) being substantially perpendicular to said line two (521).

9. A luminaire comprising a lens as claimed in any one of claims 1 to 8.

10. An optical system comprising a lens as claimed in any one of claims 1 to 8.

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