Global light spot high-uniformity illumination system based on optical fiber light emission

Abstract

The utility model discloses a global light spot high-uniformity illumination system based on optical fiber light emission. The lighting system comprises an optical fiber light source, a first lens set, a second lens set and a third lens set which are sequentially arranged in the optical axis direction. The fiber-optic light source has a light-emitting source and an optical fiber. The beneficial effects of the utility model are that the light emitted by the light emitting source is coupled to the optical fiber and is homogenized by the optical fiber, then the light emitted by the optical fiber is used as a secondary light source, and a Galileo or Kepler telescope structure composed of the second lens group and the third lens group is matched, so that the angle change with larger magnification is realized, and the angle change is more accurate. And the illumination or irradiance uniformity of the illumination in the whole process of angle change is maintained at a relatively high level.

Description

Technical Field

[0001] The utility model relates to zoom lighting, in particular to a global light spot high-uniformity lighting system based on optical fiber light output. Background Art

[0002] With the increase of variable distance lighting or laser glare scenes, in order to achieve better lighting or glare effects, the uniformity of the light spot is usually required to be high, and the whole process of angle change is required to have high uniformity. In the existing technology, the use of LED to make searchlights or blue laser to excite fluorescent materials to generate white light to make searchlights has the problem of poor uniformity. Utility Model Content

[0003] The utility model aims to solve the problems in the prior art and provide a novel global light spot high uniformity lighting system based on optical fiber light output.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a technical solution: a global spot high uniformity illumination system based on optical fiber light output, comprising: an optical fiber light source, lens group 1, lens group 2 and lens group 3 arranged in sequence along the optical axis direction, the lens group 1 has a convergence effect, the lens group 2 and the lens group 3 form a Galilean or Keplerian telescope structure, and the light output of the optical fiber light source passes through the lens group 1, the lens group 2 and the lens group 3 in sequence to be emitted outward. The optical fiber light source has a light source and an optical fiber, the light source is relative to the incident end of the optical fiber, the light output of the light source is coupled to the incident end of the optical fiber, is homogenized inside the optical fiber, and is emitted outward from the output end of the optical fiber.

[0005] As a preferred solution for the global light spot high uniformity illumination system based on optical fiber light output, the light source is LED, LD or other light sources.

[0006] As a preferred solution of the global light spot high uniformity illumination system based on optical fiber light output, the light source is used to emit monochromatic light or white light.

[0007] As a preferred solution of the global spot high uniformity illumination system based on optical fiber light output, the ratio of the optical fiber length to the diameter is relatively large, such as a ratio of ≥1000 times;

[0008] As a preferred solution for the global spot high uniformity illumination system based on optical fiber light output, the optical fiber placement needs to be properly wound, generally more than 360°.

[0009] As a preferred solution for a global spot high uniformity illumination system based on fiber optic light output, the lens group one, the lens group two and the lens group three are configured as follows: the lens group one is fixed, and at most one of the lens group two and the lens group three is movable and the movement direction is along the optical axis.

[0010] As a preferred solution of a global spot high uniformity illumination system based on optical fiber light output, when the lens group two is a single lens, the radius of curvature of a surface of the lens group two facing the lens group three is greater than the radius of curvature of a surface of the lens group two facing away from the lens group three.

[0011] As a preferred solution of a global spot high uniformity illumination system based on optical fiber light output, when the lens group three is a single lens, the curvature radius of a surface of the lens group three facing the lens group two is greater than the curvature radius of a surface of the lens group three facing away from the lens group two.

[0012] Compared with the prior art, the beneficial effect of the utility model is at least that: by coupling the light output from the light source to the optical fiber, homogenizing it through the optical fiber, and then using the light output from the optical fiber as a secondary light source, in combination with a Galilean or Keplerian telescope structure composed of the lens group two and the lens group three, a larger magnification angle change can be achieved, and the illumination or irradiance uniformity of the light is maintained at a high level throughout the entire angle change process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the lighting system of the utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the optical fiber in the utility model (7 cores).

[0015] Figure 3 This is a schematic diagram of the structure of the optical fiber in the utility model (3 cores).

[0016] Figure 4 This is a diagram of the use status of the lighting system of the utility model (before the second lens group moves).

[0017] Figure 5 This is a diagram of the lighting system of the utility model in use state (after the second lens group moves). DETAILED DESCRIPTION

[0018] The present invention is further described in detail below through specific implementations in combination with the accompanying drawings. It should be noted that the description of these implementations is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] See also Figures 1 to 5 , the figure shows a global spot high uniformity lighting system based on optical fiber light output. The light source system can be used in lamps such as searchlights.

[0020] The light source system comprises: an optical fiber light source 1, a lens group 1 2, a lens group 2 3, a lens group 3 4, etc. The optical fiber light source 1, the lens group 1 2, the lens group 2 3, and the lens group 3 4 are arranged in sequence along the optical axis direction.

[0021] The focal length of the lens group 1 2 is positive, and its purpose is to converge the light emitted by the optical fiber light source 1 to a smaller divergence angle.

[0022] The optical angle of the second lens group 3 is positive or negative, and the optical focal length of the third lens group 4 is positive, so that the second lens group 3 and the third lens group 4 form a Galilean or Keplerian telescope structure. For safety reasons, the Galilean telescope structure is usually preferred.

[0023] The light emitted from the optical fiber light source 1 passes through the lens group 1 2, the lens group 2 3, and the lens group 3 4 in sequence and then is emitted outward. The final light spot can maintain high uniformity at a distance greater than 30 times the lens aperture of the lens group 3 4.

[0024] In some embodiments, the fiber optic light source 1 has a light source and an optical fiber 10. The light source is opposite to the incident end of the optical fiber 10. The light source can be an LED, LD or other light source. The light source is used to emit monochromatic light or white light. The optical fiber 10 can be a single core or multiple cores ( Figure 2 It is an optical fiber with 7 cores. Figure 3 The optical fiber 10 has a length-to-diameter ratio that is relatively large, such as a ratio of ≥1000 times; and the placement of the optical fiber 10 requires proper winding, generally requiring winding of more than 360°. The working principle of the optical fiber light source 1: The light beam of the light source is coupled to the incident end of the optical fiber 10, and after being homogenized by the optical fiber 10, it is emitted from the output end of the optical fiber 10.

[0025] In some embodiments, the lens group 1 2, the lens group 2 3 and the lens group 3 4 are configured such that: the lens group 1 2 is fixed, and at most one of the lens group 2 3 and the lens group 3 4 is movable and the moving direction is along the optical axis. Figure 4 and Figure 5, the lens group 2 3 is movable and the lens group 3 4 is fixed, and when the lens group 2 3 is close to the lens group 3 4, the divergence angle of the final light emitted by the light source system becomes larger. It should be noted that if the outer end of the lens group 3 4 has a protective lampshade, then either the lens group 2 3 or the lens group 3 4 can be movable; if the outer end of the lens group 3 4 does not have a protective lampshade 5, then only the lens group 2 3 can be movable.

[0026] When the lens group 2 3 is a single lens, the curvature radius of a surface of the lens group 2 3 facing the lens group 3 4 is greater than the curvature radius of a surface of the lens group 2 3 facing away from the lens group 3 4 .

[0027] When the lens group three 4 is a single lens, the curvature radius of a surface of the lens group three 4 facing the lens group two 3 is greater than the curvature radius of a surface of the lens group three 4 facing away from the lens group two 3 .

[0028] The above only expresses the implementation mode of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A global spot high uniformity lighting system based on optical fiber light output, characterized in that: include: An optical fiber light source, a lens group 1, a lens group 2, and a lens group 3 are sequentially arranged along the optical axis direction, wherein the lens group 1 has a converging effect, the lens group 2 and the lens group 3 form a Galilean or Keplerian telescope structure, and the light from the optical fiber light source sequentially passes through the lens group 1, the lens group 2, and the lens group 3 to be emitted outward; The fiber light source comprises a light source and an optical fiber, wherein the light source is opposite to the incident end of the optical fiber, and the light output from the light source is coupled to the incident end of the optical fiber, is homogenized inside the optical fiber, and is emitted outward from the output end of the optical fiber; The ratio of the optical fiber length to the diameter is ≥1000 times; The optical fiber placement needs to be wound more than 360°.

2. The global spot high uniformity lighting system based on optical fiber light output according to claim 1, characterized in that: The light source is LED or LD.

3. The global spot high uniformity lighting system based on optical fiber light output according to claim 1, characterized in that: The light source is used to emit monochromatic light or white light.

4. The global spot high uniformity lighting system based on optical fiber light output according to claim 1, characterized in that: The lens group 1, the lens group 2 and the lens group 3 are configured as follows: the lens group 1 is fixed, and at most one of the lens group 2 and the lens group 3 is movable and the moving direction is along the optical axis.

5. The global spot high uniformity lighting system based on optical fiber light output according to claim 4, characterized in that: When the lens group 2 is a single lens, the curvature radius of a surface of the lens group 2 facing the lens group 3 is greater than the curvature radius of a surface of the lens group 2 facing away from the lens group 3.

6. The global spot high uniformity lighting system based on optical fiber light output according to claim 4, characterized in that: When the lens group three is a single lens, the curvature radius of a surface of the lens group three facing the lens group two is greater than the curvature radius of a surface of the lens group three facing away from the lens group two.

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