A lens and optical system

Abstract

A lens and optical system are disclosed. The optical system includes a light source, a light-diffusing plate, and a lens in sequence according to the light emission direction. The lens includes an incident surface, a reflecting surface, and an emitting surface. The emitting surface is located on the opposite side of the reflecting surface and is stepped, comprising several stepped surfaces with different heights. Adjacent stepped surfaces are connected by connecting surfaces. The stepped surfaces are located above the incident surface and have optical textures that disperse light. The connecting surfaces are total internal reflection surfaces. The presence of both the reflecting and connecting surfaces as total internal reflection surfaces improves the brightness of the light emitted from the stepped surfaces and reduces stray light affecting the light emission. The different heights and staggered arrangement of the stepped surfaces create a floating, three-dimensional effect on the entire emitting surface. The light-diffusing plate disperses the light from the LED chips, resulting in more uniform light emission from the lens.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a lens and an optical system. Background Technology

[0002] Lenses are widely used in the optical systems of lighting fixtures. Lenses can be designed to focus or disperse light depending on the required function. Currently, regardless of the type of lens, the light-emitting surface is a single, flat surface, lacking a three-dimensional effect. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a lens and an optical system, wherein the light-emitting surface of the lens is stepped and the light-emitting surface has a three-dimensional effect.

[0004] To solve the above-mentioned technical problems, one of the technical solutions of this utility model is: a lens, including an incident surface, a reflecting surface, and an emitting surface. The emitting surface is located on the opposite side of the reflecting surface. The emitting surface is stepped, comprising several stepped surfaces with different heights. Adjacent stepped surfaces are connected by connecting surfaces. The stepped surfaces are located above the incident surface, and optical textures that disperse light are provided on the stepped surfaces. The connecting surfaces are total reflection surfaces. The principle of this utility model is that both the reflecting surface and the connecting surface are total reflection surfaces, which can improve the brightness of the light emitted from the stepped surface and reduce the impact of stray light on the light emitted from the stepped surface. Since each stepped surface has a different height and is staggered, when light is emitted from the stepped surface, a floating three-dimensional effect is formed on the entire emitting surface. This type of emitting surface can be applied to signal lights, brake lights, headlights, position lights, etc.

[0005] As an improvement, the lens has a triangular cross-section, with the bottom surface of the lens being the light-incident surface, the outer side of the lens being the reflecting surface, and the inner side of the lens being the light-exit surface.

[0006] As an improvement, the lens is a stretching body or a rotating body.

[0007] As an improvement, the angle between the connecting surface and the incident light surface is 70~90°.

[0008] To solve the aforementioned technical problems, the second technical solution of this utility model is: an optical system comprising, in sequence according to the light emission direction, a light source, a light-diffusing plate, and a lens. The lens includes an incident surface, a reflecting surface, and an emitting surface. The emitting surface is located on the opposite side of the reflecting surface and is stepped, comprising several stepped surfaces with different heights. Adjacent stepped surfaces are connected by connecting surfaces. The stepped surfaces are located above the incident surface and have optical textures that disperse light. The connecting surfaces are total reflection surfaces. The principle of this utility model is as follows: both the reflecting surface and the connecting surface are total reflection surfaces, which can improve the brightness of the light emitted from the stepped surface and reduce stray light affecting the light emitted from the stepped surface; each stepped surface has a different height and is staggered, creating a floating three-dimensional effect on the entire emitting surface when light is emitted from the stepped surface; the light-diffusing plate can disperse the light from the LED beads, making the light emitted from the lens more uniform; this type of emitting surface can be applied to signal lights, brake lights, headlights, position lights, etc.

[0009] As an improvement, the lens has a triangular cross-section, with the bottom surface of the lens being the light-incident surface, the outer side of the lens being the reflecting surface, and the inner side of the lens being the light-exit surface.

[0010] As an improvement, the lens is a stretching body or a rotating body.

[0011] As an improvement, the angle between the connecting surface and the incident light surface is 70~90°.

[0012] As an improvement, the light-diffusing plate is placed close to the incident surface of the lens.

[0013] As an improvement, the light source includes a lamp board and a number of LED beads disposed on the lamp board, the LED beads being distributed according to the shape of the light incident surface of the lens.

[0014] The beneficial effects of this utility model compared with the prior art are: Both the reflective and connecting surfaces are total reflection surfaces, which can improve the brightness of the stepped surface and reduce the impact of stray light on the light output of the stepped surface; each stepped surface has a different height and is staggered with each other, so when the stepped surface emits light, it forms a floating three-dimensional effect on the entire light output surface; the light doubling plate can disperse the light of the LED beads, making the light output of the lens more uniform. Attached Figure Description

[0015] Figure 1 This is an exploded view of the first optical system.

[0016] Figure 2 This is an exploded view of the second type of optical system.

[0017] Figure 3 This is a diagram showing the relationship between the lens, the light-diffusing plate, and the light source. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figures 1 to 3 As shown, an optical system includes, in sequence according to the light emission direction, a light source, a light-diffusing plate 2, and a lens 1. The lens 1 includes an incident surface 11, a reflecting surface 13, and an emitting surface 12. The emitting surface 12 is located on the opposite side of the reflecting surface 13. The cross-section of the lens 1 is approximately triangular. The bottom surface of the lens 1 is the incident surface 11, the outer side of the lens 1 is the reflecting surface 13, and the inner side of the lens 1 is the emitting surface 12. The lens 1 is a stretched or rotating body, such as a strip or a ring, and can be designed according to the shape of the lamp. The emitting surface 12 is stepped, comprising several stepped surfaces 121 with different heights, and adjacent stepped surfaces 121 are connected by a connecting surface 122. Next, the stepped surface 121 is located above the light-incident surface 11, and the number of stepped surfaces 121 is designed according to needs. The stepped surface 121 is provided with optical textures that disperse light, such as vertical textures or corn kernel textures. The connecting surface 122 is a total reflection surface 13, and the angle between the connecting surface 122 and the light-incident surface 11 is 70~90°. After the light enters the lens 1 from the light-incident surface 11, part of the light directly exits from the stepped surface 121, and the other part of the light is reflected by the reflecting surface 13 and the connecting surface 122 and finally exits from the stepped surface 121. The light-diffusing plate 2 is closely attached to the light-incident surface 11 of the lens 1. The shape of the light-diffusing plate 2 can be similar to the shape of the light-incident surface 11. The light-diffusing plate can disperse the light from the LED beads, making the light output of the lens 1 more uniform. The light source includes a lamp board 3 and a number of LED beads 4 disposed on the lamp board 3. The LED beads 4 are distributed according to the shape of the light-incident surface 11 of the lens 1.

[0020] The principle of this invention is as follows: both the reflective surface 13 and the connecting surface 122 are total reflective surfaces 13, which can improve the light output brightness of the stepped surface 121 and reduce the influence of stray light on the light output of the stepped surface 121; each stepped surface 121 has a different height and is staggered with each other, so when the stepped surface 121 emits light, it forms a floating three-dimensional effect on the entire light output surface 12; this type of light output surface 12 can be applied to signal lights, brake lights, headlights, position lights, etc.

Claims

1. A lens comprising an incident surface, a reflecting surface, and an exiting surface, characterized in that: The light-emitting surface is located on the opposite side of the reflective surface. The light-emitting surface is stepped and includes several stepped surfaces with different heights. Adjacent stepped surfaces are connected by a connecting surface. The stepped surface is located above the light-incident surface. The stepped surface has optical textures that disperse light. The connecting surface is a total reflection surface.

2. A lens according to claim 1, characterized in that: The lens has a triangular cross-section, with the bottom surface being the light-incident surface, the outer side being the reflecting surface, and the inner side being the light-exit surface.

3. A lens according to claim 2, characterized in that: The lens is a stretching body or a rotating body.

4. A lens according to claim 1, characterized in that: The angle between the connecting surface and the incident light surface is 70~90°.

5. An optical system comprising, in sequence according to the light emission direction, a light source, a light-diffusing plate, and a lens, characterized in that: The lens includes an incident light surface, a reflecting light surface, and an exit light surface. The exit light surface is located on the opposite side of the reflecting light surface. The exit light surface is stepped and includes several stepped surfaces with different heights. Adjacent stepped surfaces are connected by a connecting surface. The stepped surface is located above the incident light surface. The stepped surface has optical textures that disperse light. The connecting surface is a total reflection surface.

6. An optical system according to claim 5, characterized in that: The lens has a triangular cross-section, with the bottom surface being the light-incident surface, the outer side being the reflecting surface, and the inner side being the light-exit surface.

7. An optical system according to claim 6, characterized in that: The lens is a stretching body or a rotating body.

8. An optical system according to claim 5, characterized in that: The angle between the connecting surface and the incident light surface is 70~90°.

9. An optical system according to claim 5, characterized in that: The light-diffusing plate is closely attached to the incident light surface of the lens.

10. An optical system according to claim 5, characterized in that: The light source includes a lamp board and a number of LED beads disposed on the lamp board, the LED beads being distributed according to the shape of the light incident surface of the lens.

Images