Implement method for light-emitting diode (LED) secondary light distribution lens capable of obtaining evenly distributed rectangular light spots
A technology of uniform distribution and secondary light distribution, applied in the field of applied optics, can solve problems such as the complexity of three-dimensional design, and achieve the effects of reducing design difficulty, solving design errors, and improving uniformity
Inactive Publication Date: 2012-09-19
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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[0007] In view of this, the technical problem to be solved by the present invention is: to overcome the shortcomings of the existing two-dimensional design and the complexity of the three-dimensional design, to provide a method for realizing the LED secondary light distribution lens with uniform distribution of rectangular light spots, and to make the curved surface of the lens The three-dimensional design is decomposed into several two-dimensional designs, realizing the secondary light distribution of LED lights, the light spot is rectangular, and the light distribution in the entire rectangular area is uniform
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[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0033] The implementation method of the LED secondary light distribution lens with evenly distributed rectangular light spots provided by the present invention comprises the following steps:
[0034] Step 1: According to the provided LED light source information, determine that the light distribution function of the LED light source satisfies the relationship: I(θ)=80*cos 2 θ;
[0035] Step 2: Determine the length a=30m, width b=16m of the rectangular target lighting area as required, and the distance h=10m between the light source and the lighting area;
[0036] Step 3: select the lens material as PMMA, and the refractive index of this material is n=1.49;
[0037] Step 4: Divide the rectangular lighting area into sever...
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The invention discloses an implement method for a light-emitting diode (LED) secondary light distribution lens capable of obtaining evenly distributed rectangular light spots. The implement method includes determining the distribution of light of an LED light source which is required for light distribution design; determining an illumination rectangular area and the distance between the light source and the illumination area; determining a lens material; dividing the rectangular area into a plurality of line segments which pass through the center of the rectangle; establishing and obtaining the one-to-one correspondence relation between any point on the line segments and an emergence angle of the light source on the basis of the law of conservation of energy; and solving a light distribution curved surface of the light distribution lens on the basis of the refraction law and the correspondence relation. According to the implement method for the LED secondary light distribution lens capable of obtaining the evenly distributed rectangular light spots, the secondary light distribution of an LED is achieved, the light spots are rectangular after the light distribution, and the light is evenly distributed.
Description
technical field [0001] The present invention is applied to the field of optical technology, and in particular relates to a method for realizing an LED secondary light distribution lens with evenly distributed rectangular light spots. Background technique [0002] With the development trend of low-carbon energy-saving and green environmental protection, light-emitting diodes (LEDs) have attracted more and more attention due to their advantages of low energy consumption, high luminous efficiency and long life. As a new type of light source, LED is increasingly used in various lighting systems. However, LED lamps still have problems that need to be solved urgently. Due to the small size of the LED lamp, its light-emitting area is small and its directionality is strong, so the irradiation area is limited, and it needs to be distributed twice to meet the actual needs. [0003] There are two methods currently used in light distribution: reflective light distribution and refracti...
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IPC IPC(8): F21V5/04
Inventor 谢常青辛将朱效立刘明
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI