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CN-224229817-U - Lens

CN224229817UCN 224229817 UCN224229817 UCN 224229817UCN-224229817-U

Abstract

The utility model relates to the technical field of illumination, in particular to a lens, which comprises a lens body, wherein the lens body comprises an incidence cavity, a first incidence surface is arranged at the top of the incidence cavity, the side wall of the incidence cavity is provided with a second incidence surface, the second incidence surface is of a curved surface structure, the second incidence surface protrudes towards the middle part of the incidence cavity, the incidence cavity is of a round platform structure, the radius of the cross section of the incidence cavity gradually decreases from the bottom to the top, the top of the lens body is provided with a concave first emergent surface, the first emergent surface protrudes towards the inside of the lens body, the side wall of the lens body is provided with a reflecting surface, the second incidence surface of the lens body is of a curved surface protruding towards the middle part of the incidence cavity, under the light condition of the same incidence angle, the distance from a light spot formed on the reflecting surface to the emergent surface is closer than that of a traditional lens, the color difference is smaller than that of the traditional lens body, and the consistency of light color is improved.

Inventors

  • HUO YONGFENG
  • CAO WENQIANG
  • DENG QIUJU

Assignees

  • 成都恒坤光电科技有限公司

Dates

Publication Date
20260512
Application Date
20250515

Claims (6)

  1. 1. The lens is characterized by comprising a lens body (1), wherein the lens body (1) comprises an incidence cavity (2), a first incidence surface (21) is arranged at the top of the incidence cavity (2), the side wall of the incidence cavity (2) is provided with a second incidence surface (22), the second incidence surface (22) is of a curved surface structure, the second incidence surface (22) protrudes towards the middle part of the incidence cavity (2), the incidence cavity (2) is in a round table shape, and the radius of the cross section of the incidence cavity (2) gradually decreases from the bottom to the top; The top of the lens body (1) is provided with a concave first emergent surface (3), and the first emergent surface (3) is a concave surface; the side wall of the lens body (1) is provided as a reflecting surface (5).
  2. 2. A lens according to claim 1, characterized in that the angle α between the optical axis of the lens body (1) and the line connecting the vertex to the bottom of the second entrance surface (22) is in the range of 5 ° to 50 °.
  3. 3. A lens according to any of claims 1-2, characterized in that the bottom of the first exit surface (3) is provided with a convex second exit surface (4), the second exit surface (4) being convex.
  4. 4. A lens according to claim 3, characterized in that the second exit surface (4) is provided with a third exit surface (6) on top, the third exit surface (6) being of planar construction.
  5. 5. A lens according to claim 4, characterized in that the second exit surface (4) and the third exit surface (6) are provided with spherical micro lenses (7).
  6. 6. A lens according to claim 5, characterized in that the reflecting surface (5) is covered with a scale (8).

Description

Lens Technical Field The utility model relates to the technical field of illumination, in particular to a lens. Background Along with the continuous development of lighting technology, an LED (LIGHT EMITTING Diode) is used as a novel light source, and has the advantages of low energy consumption, long service life, fast response speed, small volume, environmental friendliness, capability of realizing multicolor lighting and the like, so that the LED gradually replaces the light sources of the traditional incandescent lamp, fluorescent lamp and the like, and is widely applied to a plurality of fields such as road lighting, commercial lighting, indoor lighting, car lights, backlight sources and the like. However, although the performance of the LED light source is excellent, a large number of LED lamps on the market still have significant optical quality problems at present, and especially, the quality of the light spots is not ideal, which is often manifested as uneven distribution of the main light spots and the auxiliary light spots, blurred edges, uneven brightness and darkness, and formation of parasitic light. The problem can seriously influence the uniformity and visual aesthetic feeling of illumination, and the long-term use of the LED lamp with poor light spot quality can also lead to visual fatigue, so that irreversible visual damage is caused to eyes of people, especially, the problem is more prominent in scenes with higher requirements on illumination quality (such as office work, reading, medical illumination and the like), the incident cavity of the existing lens is of a cylindrical structure, the cross section of the side wall of the incident cavity is in a straight line, after light rays are emitted into the incident cavity, the cross section of the incident surface is in contact with the side wall of the incident cavity, and the normal direction of each position of the side wall of the incident cavity is the same, so that the change range of the incident angle of the light rays entering the lens after being reflected by the side wall of the incident cavity is limited, and the propagation path of the light rays entering the lens body is concentrated, so that the light rays are easy to penetrate out from the emergent area of the lens when being secondarily reflected, the light rays form interference fringes with the light rays penetrating from the incident surface of the lens, the light spots of the incident area appear stray light and the light spots of the irradiated area are overlarge, and the light spot color difference of the irradiated area is reduced, and the quality of the light spots is reduced. Disclosure of utility model The utility model aims to overcome the defects that in the traditional lens in the prior art, the change range of the incident angle of light entering the lens is limited after the light enters the lens to be contacted with the incident surface, so that stray light appears on light spots in an irradiation area of the lens and the light spots have overlarge chromatic aberration, and provides the lens. In a first aspect, the present utility model provides a lens, including a lens body, where the lens body includes an incident cavity, a first incident surface is disposed at the top of the incident cavity, a side wall of the incident cavity is set to be a second incident surface, the second incident surface is of a curved surface structure, the second incident surface protrudes toward the middle of the incident cavity, the incident cavity is of a truncated cone structure, and a radius of a cross section of the incident cavity gradually decreases from the bottom to the top; The top of the lens body is provided with a concave first emergent surface, and the first emergent surface is a concave surface; the side wall of the lens body is provided as a reflecting surface. The utility model provides a lens, wherein an incidence cavity is arranged in a lens body and is used for injecting light into the lens, the side wall of the incidence cavity is provided with a second incidence surface, the second incidence surface is provided with a curved surface structure protruding towards the middle part of the incidence cavity, the incidence cavity is of a round platform structure with the cross section radius gradually reduced from the bottom to the top, refraction and reflection are generated when the light is injected into the second incidence surface, and refraction light is generated when the light contacts with the second incidence surface, the refraction light enters the lens through the second incidence surface and forms a light spot on the reflection surface, compared with the traditional lens, the second incidence surface of the lens body is a curved surface protruding towards the middle part of the incidence cavity, and under the light condition of the same incidence angle, the distance from the light spot formed on the reflection surface to the emergence surface is closer th