Design method of LED homogeneous reflector based on optical extension and use thereof

A technology of etendue and uniform illumination, which is applied to reflectors, lighting and heating equipment, components of lighting devices, etc., can solve the problems of complex structure of reflectors and light guide plates, low energy utilization rate, inconvenient processing, etc., to achieve Increase the utilization rate of light energy, high energy utilization rate, and improve the uniformity of illumination

Inactive Publication Date: 2009-11-25
CHINA JILIANG UNIV
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Problems solved by technology

[0007] However, the combined structure of the reflector and the light guide plate in the prior art is too complicated and inconvenient to process. Although some optical transm

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  • Design method of LED homogeneous reflector based on optical extension and use thereof
  • Design method of LED homogeneous reflector based on optical extension and use thereof
  • Design method of LED homogeneous reflector based on optical extension and use thereof

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[0050] The design method of the present invention applies the theory of conservation of optical expansion in non-imaging optics to establish the general mathematical model of the reflector based on the analysis of the luminous characteristics of the LED light source and the requirements of specific target planar illumination, and the uniform illumination can be realized by using a single reflector. And higher uniformity of illumination and energy utilization can be obtained on the target plane.

[0051] Using the related theory of optical expansion, see figure 2 , A polar coordinate system is established, the center of the light-emitting surface of the LED is placed at the origin of the coordinate system (0, 0), and the normal of the light-emitting surface is along the negative direction of the x-axis. In polar coordinates, the differential equation of the contour of the reflecting surface is:

[0052] dr ( θ ...

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Abstract

The invention discloses a design method of LED homogeneous reflector based on optical extension and use thereof; general mathematic models are established by using the theory of optical extension conservation in non-imaging optics according to the luminescence properties of LED light source and the analysis of special target plane illumination requirement; and the reflection surface is a curved surface determined by curved rotation limited by the curvilinear equation in the description. Uniform illumination can be realized by using a single reflector, and higher illumination homogeneity and energy utilization rate are obtained on the target plane. The design method of reflector with uniform illumination in the invention can be used for system of uniform illumination in high requirement, such as microscope illumination system, indoor illumination and optical projection system using LED as light source. Therefore, the invention not only can simplify the structure of the system but also can increase the utilization rate of optical energy, and the illumination homogeneity also can be greatly improved. Therefore, the invention has very good application prospect.

Description

technical field [0001] The invention relates to LED lighting technology, in particular to a design method of a uniform lighting reflector and a reflector obtained by the design method. Background technique [0002] With the development of semiconductor lighting technology, LED, as a new artificial light source, has shown a very broad application prospect due to its small size, low energy consumption, good monochromaticity and other advantages. LEDs are gradually replacing traditional light sources and becoming a new generation of light sources. However, there are still many deficiencies in LEDs at present. The total luminous energy of a single LED is low, and most LED products have a Lambertian distribution luminous curve with a large divergence angle, so they cannot be used alone in lighting systems. In most applications, People need additional optical elements to cooperate with LEDs to achieve uniform illumination within a certain range. [0003] In the prior art, there ...

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Application Information

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IPC IPC(8): F21V7/04H01L33/00F21Y101/02F21Y115/10
Inventor 余桂英金骥朱旭平蒋贤满
Owner CHINA JILIANG UNIV
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