Large-area uniform illumination system based on aspheric lens surface shape numerical reconstruction

A technology of aspherical lens and uniform illumination, which is applied in the direction of lighting devices, lighting and heating equipment, components of lighting devices, etc.

Active Publication Date: 2020-10-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing direct method is mainly to calculate the lens surface shape for the target light intensity distribution, and it is still difficult to achieve a specific illuminance di

Method used

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  • Large-area uniform illumination system based on aspheric lens surface shape numerical reconstruction
  • Large-area uniform illumination system based on aspheric lens surface shape numerical reconstruction
  • Large-area uniform illumination system based on aspheric lens surface shape numerical reconstruction

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Experimental program
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Embodiment

[0045] Embodiment: the aspheric lens unit intends to adopt as attached Figure 4 For the structure type shown, the surface function of the incident surface adopts an 8th-order even-degree polynomial, and the surface function of the initial surface of the outgoing surface also adopts an 8-order even-degree polynomial. The light source of the light-emitting surface uses an LED with a light-emitting surface size of 1.3mmx1.3mm light source, and assume that the brightness distribution of the LED light source satisfies (where C1 is a constant). It is required that the outgoing light beam of the light source array is deflected by the aspheric lens array to produce a uniform illumination spot in the target rectangular illumination area of ​​the target illumination surface. The radius of the extended circular light source is 0.75mm, the center point of the light source is at the coordinate origin, and the maximum emission angle of the light source is It is assumed that the incident...

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Abstract

The invention discloses a large-area uniform illumination system based on aspheric lens surface shape numerical reconstruction, and belongs to the technical field of non-imaging optics and extended light source beam shaping. The system comprises a plurality of array units which are arranged at equal intervals in a row direction and a column direction and have the same structure. Each array unit iscomposed of an aspheric lens (U) and a light-emitting surface light source (V). The aspheric lens surface type parameters of all the aspheric lenses (U) are the same, and all the light-emitting surface light sources (V) are the same; the optical axis of each light-emitting surface light source coincides with the optical axis of the corresponding aspheric lens, light emitted by the light-emittingsurface light sources is deflected by the corresponding aspheric lenses to generate corresponding energy distribution units on a target lighting surface, and all the energy distribution units are overlapped to generate preset large-area uniform energy distribution. The system is compact and simple in structure; the illumination area is large, the energy distribution uniformity is high, and the energy utilization rate is high; practicability is high, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of non-imaging optics and beam shaping of extended light sources, in particular to a large-area uniform illumination system based on numerical reconstruction of aspherical lens surfaces. Background technique [0002] The main purpose of lighting design is to redistribute the spatial energy distribution of the light source using precisely designed and processed optical surfaces to produce the targeted lighting effect. The performance of the lighting system is largely limited by the effectiveness of the optical surface design method, and the current lighting design method can be divided into the design method for the zero-extended-expenditure light source and the design method for the non-zero-expenditure light source. [0003] The design approach for zero etendue sources is very effective if the etendue of the source is assumed to be zero. Since the spatial and angular extent of the actual light source is no...

Claims

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Application Information

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IPC IPC(8): F21K9/20F21V5/04G06F30/20G06T17/10F21Y115/10
CPCF21K9/20F21V5/007F21V5/04G06F30/20G06T17/10F21Y2115/10
Inventor 吴仍茂丁章浩刘映利郑臻荣刘旭
Owner ZHEJIANG UNIV
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