Method for free curved surface optical component for collimating light shaping

A technology of optical components and design methods, applied in the directions of optical components, optics, lighting device components, etc., can solve problems such as discontinuous free-form surfaces, difficult problems, and not satisfying integrable conditions.

Active Publication Date: 2013-02-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some easy-to-obtain energy mapping relationships often do not satisfy the integrability condition, and only discontinuous free-form surfaces can be obtained at this time
For example, Chinese patent 200910046129.5 uses a variable-separable mapping relationship to realize rectangular lighting, but only discontinuous free-form surfaces can be obtained, which undoubtedly poses a big problem for actual processing.

Method used

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  • Method for free curved surface optical component for collimating light shaping
  • Method for free curved surface optical component for collimating light shaping
  • Method for free curved surface optical component for collimating light shaping

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Embodiment 1: The free-form surface optical element intends to adopt such as attached image 3 In the type of structure shown, the front surface S1 adopts a plane, and the rear surface S2 is a free-form surface, so the focus of this design is how to design the rear surface S2 of this free-form optical element. Assuming that the incident collimated light beam has an equal intensity distribution, the light beam will produce a square illumination with a smiling face pattern on the target illumination surface after light distribution by the free-form surface lens. It is required that both the smiling face pattern and the square background are uniformly illuminated, and the illuminance ratio of the two is 3:2. The z coordinate of the vertex of the free-form surface S2 on the back surface is 5 mm, the distance between the front surface S1 of the free-form lens and the target lighting surface is 300 mm, the side length of the square illumination spot is 100 mm, and the cross-s...

Embodiment 2

[0080] Embodiment 2: The free-form surface optical element intends to adopt such as attached image 3 In the type of structure shown, the front surface S1 adopts a plane, and the rear surface S2 is a free-form surface, so the focus of this design is how to design the rear surface S2 of this free-form optical element. Assuming that the incident collimated light beam has an equal intensity distribution, the light beam will produce a rectangular illumination with the word "mao" on the target illumination surface after light distribution by the free-form surface lens. It is required that both the smiling face pattern and the rectangular background are uniformly illuminated, and the illuminance ratio of the two is 3:2. The z coordinate of the vertex of the free-form surface S2 on the rear surface is 5mm, the distance between the front surface S1 of the free-form lens and the target lighting surface is 300mm, the length and width of the rectangular illumination spot are 100mm and 50mm...

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Abstract

The invention discloses a method for designing a free curved surface optical component for collimating light shaping and belongs to the technical field of non-imaging optics. The specific structure of the free curved surface optical component is set according to the design requirement, and the free curved surface which meets the preset illumination requirement can be designed according to the refraction law and the energy conversion law under the assistance of a computer, so that emergent light of a light source is deflected by the free curved surface to generate illumination light spots such as the square illumination light spots with the smile face patterns and the rectangular illumination light spots with the characters 'mao' in a target illumination area. A certain surface of the free curved surface optical component is the free curved surface which is obtained by curved surface fitting discrete data. The method is high in design efficiency; the complex illumination step can be realized; the continuous free curved surface can be obtained; and the curved surface can be processed. Refraction and reflection free curved surface optical components can be obtained by a compression molding technology by optical glass.

Description

technical field [0001] The invention relates to the technical field of non-imaging optics and illumination, in particular to a design method of a free-form surface optical element used for collimated light shaping. Background technique [0002] According to the intensity distribution of the light source (laser) and the target illumination requirements, it is a reverse design problem to design an optical surface to achieve the predetermined light distribution requirements, which has always been a hot and difficult point in the research of non-imaging optics. Due to the advantages of flexible spatial layout and design freedom of free-form surfaces, the use of free-form surfaces can not only greatly simplify the structure of the optical system, but also easily achieve complex lighting requirements. Therefore, the design of free-form surfaces plays a decisive role in solving this reverse problem. . [0003] Currently, optimal design and "Partial Differential Equation (PDE)" met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G02B27/00F21V5/04
Inventor 李海峰吴仍茂侯佳张雅琴杨洋王会会刘鹏郑臻荣刘旭
Owner ZHEJIANG UNIV
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