CN210688099U

CN210688099U - Optical lens

Info

Publication number: CN210688099U
Application number: CN201921222689.7U
Authority: CN
Inventors: 王科; 冯奇斌; 吴疆; 靳彭
Original assignee: Coreach Electronic Technology Co ltd
Current assignee: Coreach Electronic Technology Co ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-06-05
Anticipated expiration: 2029-07-31

Abstract

The utility model provides an optical lens, include: a first surface; a second surface opposite the first surface; a third surface connecting the first surface and the second surface, the third surface at least comprising a recess; wherein the second surface comprises: a bottom surface, the bottom surface being a plane, a direction parallel to the bottom surface being a first direction, a direction perpendicular to the bottom surface being a second direction, the second direction being parallel to a direction of a central axis of the optical lens; a second recess within which an optical element is disposed, the second recess comprising: a first curved surface recessed toward the optical element; a second curved surface connecting the bottom surface and the first curved surface, the second curved surface being recessed toward the third surface. The utility model provides an optical lens has improved light utilization ratio.

Description

Optical lens

Technical Field

The utility model relates to an optics field especially relates to an optical lens.

Background

Light Emitting Diodes (LEDs) are mainstream illumination Light sources due to low starting voltage, long life, high lighting efficiency, and environmental friendliness, and are currently widely used in the fields of commercial and household illumination, liquid crystal display, and the like. In order to form a surface light source with uniform brightness, a lens array is generally required to be composed of a plurality of LEDs. In order to reduce the light mixing height, a lens is generally required to regulate and control the light emitted by the LED, the light source of the LED is required to be fully utilized through the optical lens, and the light source of the LED is required to be regulated and controlled through the optical lens, so that a light spot with a larger radius is realized with a smaller light mixing distance, and the conventional refractive lens or reflective lens cannot meet the requirements.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention provides an optical lens to solve the problems of the prior art that the utilization rate of the light source is not high and the light is not uniform.

To achieve the above and other objects, the present invention provides an optical lens, including:

a first surface;

a second surface opposite the first surface;

a third surface connecting the first surface and the second surface, the third surface at least comprising a recess;

wherein the second surface comprises:

a bottom surface, the bottom surface being a plane, a direction parallel to the bottom surface being a first direction, a direction perpendicular to the bottom surface being a second direction, the second direction being parallel to a direction of a central axis of the optical lens;

a second recess within which an optical element is disposed, the second recess comprising:

a first curved surface recessed toward the optical element;

a second curved surface connecting the bottom surface and the first curved surface, the second curved surface being recessed toward the third surface.

In one embodiment, the first surface includes a first straight surface and a second straight surface, the first straight surface is connected with the second straight surface, and the second straight surface is connected with the third surface.

In one embodiment, the first and second straight faces form a first depression, the first depression being recessed toward the second surface, the first depression including a first depression center point.

In one embodiment, the slope of the second straight surface is greater than the slope of the first straight surface. In one embodiment, the second depression is recessed toward the first surface, the second depression including a second depression center point.

In one embodiment, a line connecting the center points of the first and second recesses is perpendicular to the bottom surface, and the optical lens is symmetrical about the line connecting the center points of the first and second recesses.

In one embodiment, the third surface includes a third curved surface, a third straight surface and a fourth curved surface, the third curved surface is connected to the first surface, the fourth curved surface is connected to the bottom surface, the third straight surface is connected to the fourth curved surface, and the third straight surface and the fourth curved surface form a third concave portion.

In an embodiment, the light emitted by the light emitting element and having a predetermined angle or less with respect to the central axis of the optical lens is refracted by the first curved surface to reach the first surface, and the light reaching the first surface reaches the third curved surface through total reflection of the first surface and is refracted by the third curved surface to exit.

In an embodiment, the light emitted by the light emitting element and having a central axis relative to the optical lens, which is larger than the preset angle, reaches the fourth curved surface through the refraction of the second curved surface and is refracted and emitted through the fourth curved surface.

In an embodiment, the preset angle is an included angle formed between the preset angle and a central axis of the optical lens, and a value of the preset angle is greater than or equal to 30 ° and less than or equal to 60 °.

The utility model discloses an optical lens, after the light of second depressed part through optical lens refracts the light of light source, partial light reflects the third surface in a plurality of faces of different angles of first surface through again, and partial light is direct to reach the third surface through the refraction of second depressed part in addition, and the light source passes through the utility model discloses an optical lens's many refractions and reflection to less mixed light distance realizes the facula that the radius is bigger, and the light that sends is more even, has improved the utilization ratio of light.

Drawings

FIG. 1: the present embodiment provides a schematic structural diagram of an optical element.

FIG. 2 is a schematic illustration of angle α in FIG. 1.

FIG. 3: the present embodiment provides a schematic structural diagram of another optical element.

FIG. 4: the present embodiment provides a schematic structural diagram of another optical element.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

Referring to fig. 1, the present embodiment provides an optical lens, including: a first surface S1, a second surface S2 and a third surface S3.

Referring to fig. 1, the first surface S1 includes a plurality of straight surfaces, in this embodiment, the first surface S1 includes a plurality of first straight surfaces F1 and second straight surfaces F2, the first straight surfaces F1 are connected to the second straight surfaces F2, the second straight surfaces F2 are connected to the third surface S3, the first straight surfaces F1 and the second straight surfaces F2 form a first concave portion a, the first concave portion a includes a first concave middle point AO, and an intersection of the two first straight surfaces F1 forms the first concave middle point AO. In this embodiment, the first straight surface F1 and the second straight surface F2 have a certain inclination angle, the included angle between the first straight surface F1 and the center line of the first recess a is larger than the included angle between the extending direction of the second straight surface F2 and the center line of the first recess a, that is, the slope of the second straight surface F2 is larger than the slope of the first straight surface F1, and the slope of the first straight surface F1 and the slope of the second straight surface F2 are based on the first direction. In the present embodiment, the first straight surface F1 extends obliquely from the first recess center point AO toward the second straight surface F2, the second straight surface F2 is connected to the third surface S3, and the first recess center point AO is recessed toward the second surface S2. In this embodiment, the first surface S1 serves as a reflective surface, and when light is incident on the first straight surface F1 and the second straight surface F2, the first straight surface F1 and the second straight surface F2 reflect the light to the third surface S3, and then the light exits. Part of the light rays may be refracted from the first straight surface F1, and therefore, the slope of the first straight surface F1 can be adjusted to make the central illuminance and the edge illuminance of the target surface uniform. In this embodiment, when the light is reflected from the second straight surface F2, the reflected light exits along an angle γ of 80 ° -100 °, for example 90 °.

Referring to fig. 1, the second surface S2 is located opposite to the first surface S1, and the second surface S2 includes a bottom surface N, a first curved surface D1 and a second curved surface D2. In this embodiment, the bottom surface N is, for example, a plane, and the direction parallel to the bottom surface N is set as a first direction, and the direction perpendicular to the bottom surface N is set as a second direction. The second curved surface D2 is connected to the bottom surface N, the first curved surface D1 is connected to the second curved surface D2, and a plurality of the first curved surfaces D1 and the second curved surfaces D2 form a second recess B for accommodating a light emitting element C. The second concave portion B includes a second concave center BO, and an intersection of the two first curved surfaces D1 forms the second concave center BO, in this embodiment, the first concave center AO is located above the second concave center BO, a connecting line of the first concave center AO and the second concave center BO is parallel to the second direction and perpendicular to the first direction, and a connecting line of the first concave center AO and the second concave center BO intersects with the second concave portion B at a point B1, where the point B1 is, for example, the center of the optical element C. In the present embodiment, the radius of curvature of the first curved surface D1 is concave toward the first surface S1, i.e., the first curved surface D1 is concave toward the second concave portion B, and the radius of curvature of the second curved surface D2 is concave toward the second concave portion B, i.e., the second curved surface D2 is concave toward the third surface S3.

Referring to fig. 1, the first curved surface D1 and the second curved surface D2 intersect at a point B2, and a connection line between the point B1 and the point B2 divides the optical element C into a first portion and a second portion. In this embodiment, the light in the first portion is refracted by the first curved surface D1, the refracted light is totally reflected by the first surface S1, and the reflected light is refracted by the third curved surface H1. The light rays in the second part are refracted through the second curved surface D2, and the refracted light rays are refracted through the fourth curved surface H2 and then exit.

Referring to fig. 1-2, an angle α between a line connecting the point B1 and the point B2 and a central axis of the optical lens (a line connecting the center point AO of the first concave portion and the center point BO of the second concave portion) is 30 ° -60 °, for example 35 °. in this embodiment, the first curved surface D1 and the second curved surface D2 are used as incident surfaces, when the light in the first portion is refracted from the first curved surface D1, the first curved surface D1 modulates the light to be converged and emitted along an angle β 1, the angle β 1 is 20 ° -50 °, for example 35 °. when the light in the second portion is refracted from the second curved surface D2, the second curved surface D2 modulates the light to be converged and emitted along an angle β 2, and the angle β 2 is 50 ° -90 °, for example 65 °.

Referring to fig. 1, the third surface S3 is connected to the first surface S1 and the second surface S2, the third surface S3 includes a third curved surface H1, a third straight surface F3 and a fourth curved surface H2, the fourth curved surface H2 is connected to the bottom surface N, the third straight surface F3 is connected to the fourth curved surface H2, the third curved surface H1 is connected to the third straight surface F3, and the third curved surface H1 is further connected to the first surface S1. In this embodiment, the third curved surface H1 is recessed toward the outer side of the optical element, and the fourth curved surface H2 and the third straight surface F3 form a third recess. In this embodiment, the light in the first portion is emitted from the third curved surface H1, the light in the second portion is emitted from the fourth curved surface H2, and when the light is emitted from the third straight surface F3, the light can be emitted to the substrate reflection film and reflected to the target surface again. In this embodiment, the third surface S3 serves as an exit surface, the light in the first portion is reflected from the second straight surface F2 and the first straight surface F1, most of the light exits from the third curved surface H1 and then exits to the corresponding target surface, and when another portion of the light exits from the third straight surface F3, the light is refracted to the substrate reflective film (not shown) and reflected to the corresponding target surface again. When the light in the second portion exits from the second curved surface D2, the light refracts from the fourth curved surface H2 and exits to the corresponding target surface.

Referring to fig. 1, the optical lens of the present embodiment is symmetrical about a connection line between the first concave center AO and the second concave center BO, so that the optical lens includes at least a third concave portion, and a maximum value of a projection coordinate of the third curved surface H1 in the first direction is greater than a maximum value of a projection coordinate of the fourth curved surface H2 in the first direction.

Referring to fig. 3-4, the present invention provides an optical lens, including: a first surface D1, a second surface D2, and a third surface D3, respectively, surrounding a central axis OE of the optical lens; the second surface D2 is opposite the first surface D1; the third surface D3 is connected between the first surface D1 and the second surface D2 and is formed on the peripheral side edge of the optical lens; wherein the first surface D1 includes: a first depression concave toward the second surface D2, the first depression including a first depression center point; the second surface D2 includes: a bottom surface F, the bottom surface F being a plane, a direction parallel to the bottom surface F being a first direction, a direction perpendicular to the bottom surface F being a second direction, the second direction being parallel to the direction of the central axis OE of the optical lens; and a second recess portion recessed toward the first surface D1 along the second direction, the light emitting element 10 being disposed inside the second recess portion; the third surface includes at least one third recess.

Referring to fig. 3-4, the second recess portion includes a second recess center point; a first incident region extending obliquely from the second recess center point to the outer periphery of the bottom surface F, the second recess center point having a minimum depth toward the first surface D1; a second incidence area extending from the first incidence area to the bottom surface F.

Referring to fig. 3-4, the minimum depth refers to the minimum difference between the central height of the second concave portion and the central height of the first concave portion, i.e. the central height of the second concave portion is the maximum.

Referring to FIGS. 3-4, the center point of the second cavity is the intersection of the surface S1 and the central axis OE, and the center point of the first cavity is the intersection of the curved surface S2 and the central axis OE; a first recess center point OA and a second recess center point OB. In some embodiments, a line connecting the center point of the first recess and the center point of the second recess is perpendicular to the bottom surface F, and the line overlaps with a position where a main optical axis of the optical lens is located.

Referring to fig. 3-4, the optical lens provided by the present invention is a symmetrical structure, the optical lens is centrosymmetric along the central axis OE, and the first surface D1, the second surface D2 and the third surface D3 are centrosymmetric along the central axis OE.

Referring to fig. 3-4, when the optical lens of the present invention is normally placed, the bottom surface F of the second surface D2 is disposed in contact with the substrate, at this time, the second surface D2 is the lower surface of the optical lens, the first surface D1 is opposite to the second surface D2, the first surface D1 is the upper surface of the optical lens, and the third surface D3 is a side surface connecting the upper surface and the lower surface, which is symmetrical with respect to the central axis OE of the optical lens.

Referring to fig. 3-4, the third surface D3 includes a first exit surface connected to the first surface D1 and a second exit surface connected to the bottom surface F, and the first exit surface and the second exit surface are respectively disposed at two sides of the third recess; the second exit face is connected to the bottom surface.

Referring to fig. 3-4, a maximum value of a projection coordinate of the first exit surface of the third surface along the second direction in the first direction is greater than a maximum value of a projection coordinate of the second exit surface of the third surface along the second direction in the first direction; that is, the area of the projection formed by the first emission surface in the first direction along the second direction covers and is larger than the area of the projection formed by the second emission surface in the first direction along the second direction. With the third recessed portion as a boundary, the third surface D3, i.e., the portion where the side surface is adjacent to the first surface D1, i.e., the upper surface, can be referred to as the upper half of the optical lens, and the third surface D3, i.e., the portion where the side surface is adjacent to the bottom surface F, can be referred to as the lower half of the optical lens. In some embodiments, the curvature of the first incident region is such that the light emitted from the light emitting element 10 with respect to the central axis OE of the optical lens being equal to or smaller than a predetermined angle is refracted by the first incident region to reach the first surface D1, and the light reaching the first surface D1 reaches the first exit surface through total reflection of the first surface D1 and is refracted by the first exit surface; the curvature of the second incident area is such that the light emitted by the light emitting element 10 and having the central axis OE greater than the preset angle with respect to the optical lens reaches the second exit surface through the refraction of the second incident area and is refracted through the second exit surface.

Referring to fig. 3-4, the predetermined angle is an included angle formed between the predetermined angle and the central axis OE of the optical lens, and the value of the predetermined angle is greater than or equal to 30 ° and less than or equal to 60 °.

In summary, the present embodiment provides an optical lens, in which after light of a light source is refracted by a second concave portion of the optical lens, part of the light is reflected by a plurality of light beams facing different angles on a first surface to reach a third surface, and part of the light is directly reflected by the second concave portion to reach the third surface.

The above description is only a preferred embodiment of the present application and the explanation of the applied technical principle, and it should be understood by those skilled in the art that the scope of the present application is not limited to the technical solution of the specific combination of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept, for example, the technical solutions formed by mutually replacing the above technical features (but not limited to) having similar functions disclosed in the present application.

Besides the technical features described in the specification, other technical features are known to those skilled in the art, and further description of the other technical features is omitted here in order to highlight the innovative features of the present invention.

Claims

1. An optical lens, comprising:

a first surface;

a second surface opposite the first surface;

wherein the second surface comprises:

a first curved surface recessed toward the optical element;

a second curved surface connecting the bottom surface and the first curved surface, the second curved surface being recessed toward the third surface;

the first surface comprises a first straight surface and a second straight surface, the first straight surface is connected with the second straight surface, and the second straight surface is connected with the third surface.

2. The optical lens of claim 1, wherein: the first straight surface and the second straight surface form a first concave portion, the first concave portion is recessed towards the second surface, and the first concave portion comprises a first concave center point.

3. The optical lens of claim 1, wherein: the slope of the second straight surface is greater than the slope of the first straight surface.

4. The optical lens of claim 1, wherein: the second depression is recessed toward the first surface, the second depression including a second depression center point.

5. The optical lens of claim 2, wherein: the line connecting the center points of the first and second recesses is perpendicular to the bottom surface, and the optical lens is symmetrical about the line connecting the center points of the first and second recesses.

6. The optical lens of claim 1, wherein: the third surface comprises a third curved surface, a third straight surface and a fourth curved surface, the third curved surface is connected with the first surface, the fourth curved surface is connected with the bottom surface, the third straight surface is connected with the fourth curved surface, and the third straight surface and the fourth curved surface form a third depressed part.

7. The optical lens of claim 6, wherein: the light rays emitted by the optical element and having a central axis which is equal to or smaller than a preset angle relative to the optical lens are refracted by the first curved surface to reach the first surface, and the light rays reaching the first surface are reflected by the first surface to reach the third curved surface and are refracted by the third curved surface to be emitted.

8. The optical lens of claim 7, wherein: the light rays emitted by the optical element and relative to the central axis of the optical lens, wherein the light rays are larger than the preset angle, reach the fourth curved surface through the refraction of the second curved surface, and are refracted and emitted through the fourth curved surface.

9. An optical lens according to claim 7 or 8, characterized in that: the preset angle is an included angle formed by the preset angle and the central axis of the optical lens, and the value of the preset angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.