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Design method for freeform curved surface light-reflecting device of small-sized projecting apparatus lighting system and its use

A technology of a projection device and an illumination system, which is applied to the non-imaging optics theory and the field of illumination of projection equipment, can solve the problems of reducing the utilization rate of light energy, increasing the volume and complexity of the illumination system, etc., and achieves simple structure, full utilization, total transmission high rate effect

Inactive Publication Date: 2007-09-12
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

In the lighting optical system of current projection equipment, square rods and compound eyes are generally used to improve the uniformity of illumination, but these devices increase the volume and complexity of the lighting system. The loss of the compound eye will reduce the utilization of light energy

Method used

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  • Design method for freeform curved surface light-reflecting device of small-sized projecting apparatus lighting system and its use
  • Design method for freeform curved surface light-reflecting device of small-sized projecting apparatus lighting system and its use
  • Design method for freeform curved surface light-reflecting device of small-sized projecting apparatus lighting system and its use

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Embodiment Construction

[0048] The present invention obtains the free-form surface reflector of the small projection device lighting system that realizes uniform rectangular illumination by numerically solving a set of partial differential equations, and then applies it to the small projection device lighting system using LED as the light source to achieve further miniaturization of the system . The main points of the design are as follows:

[0049] The first is the derivation of partial differential equations. The present invention uses the law of reflection, illuminance formula and energy conservation to derive the partial differential equations according to the luminous characteristics of the light source and the target plane required for uniform illumination.

[0050]Before obtaining the partial differential equations according to the light source and the illumination surface, the coordinates of the light source, the free-form surface and the target illumination surface need to be determined first. I...

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Abstract

The invention has opened a free curved surface reflection design procedures and use of one small projection installment lighting system. Free curved surface reflection of light implement design procedures is adopted law of refection , illuminance formula and energy conservation , according to the luminescence characteristic of lamp-house and needed target the balancing illumination, infers a group of partial differential equations, used differences law to find the solution, whose numerical value solution is to be a free curved surface reflection of light implement shape data , the specific target uniform rectangular lighting formed by the free curved surface reflection's refection to the photosource, can be applied to small LED light source for projection Lighting System.Its main merits are: (1) calculation time is short, only a few minutes that will be required for a free curved surface reflection; (2) the utilization of light energy is high; (3) the degree of illumination uniformity is good; (4) applying in the small projection installment of lighting system, will enable the system structure to be more compact.

Description

Technical field [0001] The present invention relates to non-imaging optics theory and the field of projection equipment lighting technology, in particular to a design method and application of a free-form surface reflector for a small projection device lighting system. The present invention is suitable for designing and applying a single LED or LED array as a light source The free-form surface reflector of the lighting system of the small projection device. Background technique [0002] In order to achieve specific lighting, the traditional free-form surface reflector design step is to first have the surface shape of the free-form surface, and further optimize the free-form surface reflector structure according to the illuminance distribution on the target surface obtained by simulation. Repeat this process and finally get a design that meets the requirements. , This method is time-consuming and laborious. Another design is through the splicing of multiple non-uniform rational B-...

Claims

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Application Information

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IPC IPC(8): G02B27/00G03B21/20
Inventor 丁毅郑臻荣刘旭李海峰顾培夫陆巍
Owner ZHEJIANG UNIV
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