CN110822322A

CN110822322A - Condensing lens system

Info

Publication number: CN110822322A
Application number: CN201911044253.8A
Authority: CN
Inventors: 尹勇健
Original assignee: Guangzhou Jiao Hui Photoelectric Technology Co Ltd
Current assignee: Guangzhou Jiao Hui Photoelectric Technology Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-02-21

Abstract

The present application relates to a condenser lens system. The condensing lens system comprises a plurality of lamp beads and a plurality of focusing lenses. A plurality of the lamp beads are arranged in a matrix, and a heat dissipation area is arranged between two adjacent lamp beads. The emergent light of each lamp bead is focused by one focusing lens to form a beam of emergent light. The formed multiple emergent light beams are focused on the same focus to achieve the purpose of improving the brightness. The heat dissipation area is arranged between the lamp beads in the condensing lens system, waste heat is prevented from being gathered, the number of the heat dissipation fins can be reduced, and therefore the size of the condensing lens system is reduced.

Description

Condensing lens system

Technical Field

The present application relates to the field of optical lighting, and more particularly, to a condenser lens system.

Background

The projector is a lamp with higher illumination intensity on the illuminated surface than the surrounding environment. Generally, it can be aimed in any direction, mainly for large-area workplace mines, stadiums, overpasses, monuments, parks, etc.

The power of LED lamp pearl is less, and the luminous quantity is few, if pile up a plurality of LED lamp pearls together in order to increase the luminous quantity, often can produce a large amount of waste heat in less space. In order to increase the heat dissipation, a heat sink structure with a large volume is correspondingly assembled, which often results in an oversized lamp.

Disclosure of Invention

In view of the above, it is necessary to provide a condenser lens system to solve the problem that the conventional projector needs to be installed with a bulky heat sink structure.

A condenser lens system comprising:

the lamp beads are arranged in a matrix manner, and a heat dissipation area is arranged between any two adjacent lamp beads;

and the emergent light of each lamp bead is focused by one focusing lens to form a bundle of emergent light, and each bundle of emergent light is focused at the same focus.

In one embodiment, the refractive indexes of the focusing lenses are the same, the curvature radiuses of the focusing lenses are sequentially increased along the directions of the two sides of the central axis of the condensing lens system, and an included angle between the emergent light of each lamp bead and the incident light surface of one focusing lens is a first preset angle, so that each beam of emergent light is focused on the same focus.

In one embodiment, the light incident surface of each focusing lens is horizontally arranged along the first direction.

In one embodiment, the light emitted by each of the lamp beads is perpendicular to the first direction.

In one embodiment, the light incident surface of each focusing lens is horizontally arranged along a first direction, the emergent light of each lamp bead is perpendicular to the first direction, the refractive indexes of the focusing lenses are the same, and the curvature radiuses of the focusing lenses are sequentially increased along the directions of the two sides of the central axis of the condensing lens system.

In one embodiment, the plurality of focusing lenses are connected by bonding, thereby forming a focusing lens body.

In one embodiment, the curvature radii of the plurality of focusing lenses are the same, the refractive indexes of the plurality of focusing lenses are sequentially reduced along the directions of the two sides of the central axis of the condensing lens system, and an included angle between the emergent light of each lamp bead and the incident light surface of one focusing lens is a first preset angle, so that each beam of emergent light is focused on the same focus.

In one embodiment, the method further comprises the following steps:

and the collimating lens group is arranged between the emergent light of the lamp bead and the focal lens.

In one embodiment, the focusing lens has a shape of one of a triangle, a quadrangle, a hexagon, or other polygons.

In one embodiment, the focusing lens is made of transparent optical glass or transparent optical plastic.

The condensing lens system comprises a plurality of lamp beads and a plurality of focusing lenses. A plurality of the lamp beads are arranged in a matrix, and a heat dissipation area is arranged between two adjacent lamp beads. The emergent light of each lamp bead is focused by one focusing lens to form a beam of emergent light. The formed multiple emergent light beams are focused on the same focus to achieve the purpose of improving the brightness. The heat dissipation area is arranged between the lamp beads in the condensing lens system, so that a large amount of waste heat is avoided being gathered, the number of heat dissipation fins can be reduced, and the size of the condensing lens system is reduced.

Drawings

FIG. 1 is a diagram of a condenser lens system provided in one embodiment of the present application;

FIG. 2 is a diagram of a condenser lens system according to an embodiment of the present application;

FIG. 3 is a diagram of a condenser lens system according to an embodiment of the present application;

FIG. 4 is a diagram of a condenser lens system provided by an embodiment of the present application;

FIG. 5 is a light distribution graph of a focusing lens system according to an embodiment of the present disclosure;

FIG. 6 is a top view of a focusing lens body according to an embodiment of the present application;

fig. 7 is a cross-sectional view of a focusing lens body according to an embodiment of the present application.

Description of the main element reference numerals

Condenser lens system 10

Lamp bead 110

Heat dissipation area 101

Focusing lens 120

Focusing lens body 130

Collimating lens group 140

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the condenser lens system of the present application will be described in further detail below by way of embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that the radius of curvature of the condenser lens in the present application specifically refers to the radius of curvature of the light exit surface of the condenser lens. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The LED projection lamp is also called a linear LED projection lamp, because the LED projection lamp is in a strip shape, the LED projection lamp is also called an LED linear lamp, is mainly used for architectural decoration and illumination and is also used for outlining large buildings. Because the LED projection lamp is mainly used for large-area operation field mines, stadiums, overpasses, monuments, parks and the like, the required larger light is bright. But the power of single LED lamp pearl is less, and luminous quantity is few. Therefore, a plurality of LED beads are generally required to be stacked together to increase the amount of light emitted. When a plurality of LED lamp beads are stacked together, a large amount of waste heat is generated in a small space. In order to increase the heat dissipation, a heat sink structure with a large volume is correspondingly assembled, which often results in an oversized lamp.

Referring to fig. 1, in order to solve the above problem, the present application provides a condenser lens system 10. The condenser lens system 10 includes a plurality of beads 110 and a plurality of focusing lenses 120.

A plurality of the lamp beads 110 are arranged in a matrix. In an alternative embodiment, a plurality of the beads 110 are arranged in a regular matrix, for example, a matrix with N rows and N columns. In an alternative embodiment, a plurality of the beads 110 are arranged in an irregular matrix. In an alternative embodiment, the light beads 110 are LED light beads. And a heat dissipation area 101 is arranged between any two adjacent lamp beads 110. Namely, a plurality of LED lamp beads are arranged, and a spacing space for heat dissipation is reserved between adjacent LED lamp beads. The emergent light of each lamp bead 110 is focused by one focusing lens 120 to form a bundle of emergent light, and each bundle of emergent light is focused at the same focus. In an alternative embodiment, the focusing lens 120 is made of transparent optical glass or transparent optical plastic. For example, the focusing lens 120 may use a quartz glass material having a refractive index of 1.3 to 1.57. The shape of the focusing lens 120 is not particularly limited as long as the light emitted from the lamp beads 110 can be focused on the same central axis.

In this embodiment, the condenser lens system 10 includes a plurality of beads 110 and a plurality of focusing lenses 120. A plurality of 110 pearls of lamp are the matrix arrangement, are equipped with the heat dissipation district between two adjacent lamp pearl 110. The emergent light of each lamp bead 110 is focused by one focusing lens 120 to form a beam of emergent light. The formed multiple emergent light beams are focused on the same focus to achieve the purpose of improving the brightness. The heat dissipation area 101 is arranged between the lamp beads 110 in the condenser lens system 10, so that a large amount of waste heat is avoided being gathered, the use of heat dissipation fins can be reduced, and the volume of the condenser lens system 110 is reduced.

In one embodiment, the refractive index of 120 of each focusing lens is the same, and the curvature radius of 120 of a plurality of focusing lenses increases in sequence along the central axis of the condenser lens system 10 toward both sides. That is, as shown in fig. 2, the radius of curvature of the focusing lens 120 increases in order to the left or right along the central axis. The radius of curvature and refractive index of the focusing lens 120 at positions equidistant from the central optical axis are the same. An included angle between the emergent light of each lamp bead 110 and the incident light surface of one focusing lens 120 is a first preset angle, so that a plurality of emergent light beams are focused on the same focus.

In the case that the curvature radius and the refractive index of the focusing lens 120 are fixed, the length of the focal length of the focusing lens 120 is also fixed, and the position of the focal point can be changed by adjusting the angle between the incident light and the incident surface of the lens. In an alternative embodiment, as shown in fig. 2, in order to focus the multiple outgoing light beams on the same focus, the outgoing light of each of the lamp beads 110 may be perpendicular to the first direction. A central LED + lens combination is arranged on the center of the matrix, and the optical axis of the combination is superposed with the central axis of the matrix. Then, the angle between the incident light and the incident surface of the lens is changed by adjusting the included angle between each focusing lens 120 and the first direction, so as to adjust the focal position of the emergent light. The focusing lens 120 may be disposed at an angle of 0 ° to 90 ° with respect to the first direction.

In addition, a collimating lens group 140 may be disposed between the lamp bead 110 and the focusing lens 120. So that the light emitted by each of the lamp beads 110 is parallel to each other after being processed by the collimating lens group 140 (i.e., the light emitted by each of the lamp beads 110 is perpendicular to the first direction). The collimating lens group 140 may be formed by combining a plurality of collimating lens mirrors.

In another alternative embodiment, as shown in fig. 3, in order to focus the multiple outgoing light beams on the same focal point, the light incident surface of each focusing lens 120 may be horizontally disposed along the first direction. A central LED + lens combination is arranged on the center of the matrix, and the optical axis of the combination is superposed with the central axis of the matrix. Then, the angle between the incident light and the incident surface of the lens is changed by adjusting the included angle between each lamp bead 110 and the first direction, so as to adjust the focal position of the emergent light. The included angle between the lamp bead 110 and the first direction can be 0-90 degrees. When the collimating lens group 140 is arranged between the lamp beads 110 and the focusing lens 120, the angle between each lamp bead 110 and the collimating lens group 140 can be adjusted, so that the size of the included angle between each lamp bead 110 and the first direction can be set arbitrarily.

In this embodiment, when the curvature radius and the refractive index of the focusing lens 120 are both fixed, the length of the focal length of the focusing lens 120 is also fixed, so that each incident light beam and the incident surface of the lens form different angles, and the position of the focal point of each emergent light beam is changed, so that the light beams emitted by the lamp beads 110 are focused on the same central axis.

Referring to fig. 4, in one embodiment, the refractive index of each focusing lens 120 is the same, and the curvature radius of the focusing lenses 120 increases along the central axis of the condenser lens system 10. The light incident surface of each focusing lens 120 is horizontally arranged along a first direction. And the emergent light of each lamp bead 110 is perpendicular to the first direction. At this time, each of the focusing lenses 120 may have a horizontal light incident surface, but one side of the light emergent surface of each of the focusing lenses 120 is higher than the other side, so that the light emitted from the lamp beads 110 may be focused on the same central axis.

For example, as shown in fig. 4, the curvature radii of R0 to R3 are sequentially increased, if the lens is differentiated, and then observed, the differentiated light emitting surface is a plane and forms an included angle α with the light incident surface, and it is known that the larger the curvature radius (the smaller the curvature), the smaller the α angle value, and it is known that visible light includes a plurality of different wavelengths of light, and the refractive indices of the same material for different wavelengths of light are different, so that as refraction occurs, a prism effect (dispersion: a commonly known rainbow effect) is generated, and many types of aberrations (chromatic dispersion, chromatic aberration, etc.) are caused, so that as long as the α angle value is smaller, the refraction effect is reduced as much as possible, thereby reducing the curvature radius of the focusing lens 120, the larger the aberrations (for example, chromatic aberration) can be reduced.

Referring to fig. 5, the light incident surface of each of the focusing lenses 120 is horizontally disposed along the first direction, so that the light incident surface of each of the focusing lenses 120 can be designed as a plane, which facilitates processing and manufacturing and reduces processing difficulty. Each of the focusing lenses 120 may be independent from the other focusing lenses 120. Each focusing lens 120 and the other focusing lenses 120 may be an integral body adhered together. In addition, a collimating lens group 140 may be disposed between the lamp bead 110 and the focusing lens 120. So that the light emitted by each of the lamp beads 110 is parallel to each other after being processed by the collimating lens group 140 (i.e., the light emitted by each of the lamp beads 110 is perpendicular to the first direction).

Referring to fig. 6 and 7, in one embodiment, the focusing lenses 120 are bonded to each other to form a focusing lens body 130. All the focusing lenses 120 are designed into a whole, and the light incident surface of the focusing lens body 130 is designed on the bottom plane of the whole, so that the structure is further simplified, the processing is convenient, and the processing difficulty is reduced. In an alternative embodiment, the focusing lens 120 is one of triangular, quadrilateral, hexagonal or other polygonal shape. In an alternative embodiment, the focusing lens body 130 is a lens formed by a plurality of tubular structure arrays, and the lens body of the lens is formed by bonding a plurality of tubular single bodies. The tubular single bodies can be quadrangle, triangle, hexagon or other polygonal composition which can be seamlessly spliced. The array body formed by bonding the plurality of tubular single bodies is used as a material and processed into a lens according to certain optical design requirements. As shown in fig. 6, the lens is a plano-convex lens composed of an array body formed by bonding a plurality of square tubular single bodies.

Further, in order to make different regions in the focusing lens body 130 have different values of refractive index and curvature radius, tubular monomers with different refractive index can be distributed in different regions of the lens. This will further simplify the function of the optical system.

In one embodiment, in order to make the focal length of the focusing lens 120 farther from the central axis longer, so as to ensure that each bundle of the emergent light is focused on the same focal point, the focal length can also be achieved by changing the refractive index of each focusing lens 120, that is, the curvature radii of the focusing lenses 120 are the same, the refractive indexes of the focusing lenses 120 are sequentially reduced along the directions of the two sides of the central axis of the condensing lens system 10, and an included angle between the emergent light of each lamp bead 110 and the incident light surface of one focusing lens 120 is a first preset angle, so that each bundle of the emergent light is focused on the same focal point.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A condenser lens system, comprising:

the lamp comprises a plurality of lamp beads (110), wherein the lamp beads (110) are arranged in a matrix, and a heat dissipation area (101) is arranged between any two adjacent lamp beads (110);

the lamp beads comprise a plurality of focusing lenses (120), emergent light of each lamp bead (110) is focused by one focusing lens (120) to form a bundle of emergent light, and each bundle of emergent light is focused at the same focus.

2. The condenser lens system as claimed in claim 1, wherein the refractive indexes of the plurality of focusing lenses (120) are the same, the radii of curvature of the plurality of focusing lenses (120) sequentially increase along the central axis of the condenser lens system (10) toward both sides, and an included angle between the outgoing light of each lamp bead (110) and the incident light surface of one focusing lens (120) is a first preset angle, so that each outgoing light beam is focused on the same focal point.

3. The condenser lens system of claim 2, wherein the light incident surface of each of the condenser lenses (120) is horizontally arranged along the first direction.

4. The condenser lens system as claimed in claim 2, wherein the light emitted from each of the beads (110) is perpendicular to the first direction.

5. The condenser lens system as claimed in claim 1, wherein the light incident surface of each of the focusing lenses (120) is horizontally disposed along a first direction, the light emitted from each of the lamp beads (110) is perpendicular to the first direction, the refractive indexes of the focusing lenses (120) are the same, and the radii of curvature of the focusing lenses (120) are sequentially increased along the central axis of the condenser lens system (10) toward both sides.

6. The condenser lens system of claim 5, wherein the plurality of focusing lenses (120) are adhesively attached to each other to form a focusing lens body (130).

7. The condenser lens system as claimed in claim 1, wherein the radii of curvature of the plurality of the focusing lenses (120) are the same, the refractive indexes of the plurality of the focusing lenses (120) decrease sequentially along the central axis of the condenser lens system (10) toward both sides, and an included angle between the outgoing light of each lamp bead (110) and the incident light surface of one of the focusing lenses (120) is a first preset angle, so that each outgoing light is focused on the same focal point.

8. The condenser lens system of claim 1, further comprising:

and the collimating lens group (140) is arranged between the emergent light of the lamp bead (110) and the focal lens (120).

9. The condenser lens system of claim 1, wherein the shape of the focusing lens (120) is one of triangular, quadrilateral, hexagonal or other polygonal.

10. The condenser lens system of claim 1, wherein the focusing lens (120) is made of transparent optical glass or transparent optical plastic.