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A Design Method of LED Lens for Non-plane Uniform Illumination

A technology of LED lens and uniform lighting, applied in lighting and heating equipment, components of lighting devices, lighting devices, etc., can solve problems such as ununiform lighting, and achieve the effects of saving design time, good lighting performance, and high flexibility

Active Publication Date: 2020-07-28
FUDAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency that the traditional free-form surface lens cannot perform uniform illumination on non-plane, and provide a design method of LED single free-form surface lens for non-planar illumination, aiming at obtaining high efficiency and high uniformity on non-planar objects. degree of illumination spot

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  • A Design Method of LED Lens for Non-plane Uniform Illumination
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  • A Design Method of LED Lens for Non-plane Uniform Illumination

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0032] The LED lens design method for non-plane uniform illumination according to the present invention specifically includes the following steps:

[0033] (1) Determine the light intensity distribution of the LED.

[0034] (2) In space Cartesian coordinates, establish a free-form surface lens mathematical model according to the light intensity distribution of the LED, take the location of the LED as the coordinate origin, place the target non-plane directly above the XOY plane, and the free-form surface lens is located between the LED and the target non-plane Between, the Z coordinates of each component should be greater than zero, the specific method is as follows:

[0035] Set the free-form surface material refractive index n A , the LED is located at the origin of the Cartesian coordinate system, under normal temperature conditions, the refrac...

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Abstract

The invention belongs to the technical field of optical lenses, and particularly relates to an LED lens design method for non-planar uniform illumination. The method comprises the following steps of:dividing a target non-planar into a plurality of grids on a projection surface of a XOY plane, introducing into a matrix, indicating a vertical distance between each grid and the LED; substituting thevertical distance into a traditional lens mathematical model, iteratively solving the model by setting the expected irradiance distribution of the target non-planar, and obtaining multiple sets of discrete points; and using a three-dimensional drawing to get a final free-form surface lens. The optical device is a single free-form surface lens, is easy to process, and has good light distribution performance. The lens performs secondary light distribution on the emitted light of the LED, and obtains a uniform irradiated light spot on the target non-plane, thereby overcoming the insufficiency that the conventional free-form lens cannot perform uniform illumination on the non-planar. According to the LED lens design method for the non-planar uniform illumination, the irradiation uniformity isgood, the uniformity on the target non-planar can reach 70.01%, and the utilization rate of the LED energy can reach 83.51% or more.

Description

technical field [0001] The invention belongs to the technical field of optical lenses, in particular to an LED lens design method for non-plane uniform illumination. Background technique [0002] As a new generation of light source, LED has the advantages of energy saving, high efficiency and long life. However, most LEDs are used as Lambertian light sources, and the lighting effect is poor, so LEDs need to be light-distributed. In recent years, LED light distribution technology has developed rapidly. Researchers have studied and proposed various design methods to achieve ideal irradiance distribution on the target lighting surface. Previous studies mainly focused on structural design, solution methods and obtaining special irradiance distribution, etc. Secondary optical design has also been proved to be an effective method to solve the above problems. [0003] In order to improve the energy utilization rate and irradiance uniformity of the LED lighting system, the early re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00F21V5/04F21Y115/10
CPCF21V5/04F21Y2115/10G02B27/0012
Inventor 孔令豹孙翔徐敏
Owner FUDAN UNIV
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