Design method for polarizing lens, polarizing lens, and LED street lamp

Abstract

Provided is a design method for a polarizing lens. The method comprises: through establishing corresponding relations of the light distribution curve of a LED light source and the light distribution curve of a LED street lamp, based on refraction of light rays through an incident plane of a polarizing lens, the light rays being emitted from the LED light source, directly forming a refracted ray in luminous intensity distribution required by reaching a target surface, an exit surface not changing propagation direction of the refracted ray, and establishing to obtain a structure model of the polarizing lens. The polarizing lens obtained by the design method uses the refraction on the incident plane of the polarizing lens to directly form the refracted ray in the luminous intensity distribution required by reaching a target surface, the polarizing lens effectively reduces total reflection in the polarizing lens, increases light out-coupling efficiency, and effectively reduces total reflection loss of light rays in relatively large angles on the exit surface of a conventional lens, and increases efficiency of the LED light source. In addition, also provided is the polarizing lens obtained by the design method for the polarizing lens, and the LED street lamp using the polarizing lens.

Description

technical field [0001] The invention relates to the field of lighting equipment, in particular to a design method of a polarized lens, a polarized lens designed using the design method, and an LED street lamp using the polarized lens. Background technique [0002] Street lamps are the main components of urban lighting. Traditional street lamps mainly use high-pressure sodium lamps, but due to their shortcomings such as large power consumption, short life, high maintenance costs, low light utilization rate, and low color rendering index, they are no longer suitable for the development of today's society. needs. Therefore, it is of great significance to develop a new type of high-efficiency, energy-saving, long-life, high color rendering index and environmentally friendly street lamp for urban energy-saving lighting. [0003] Due to the advantages of LED light source, such as high efficiency, energy saving and environmental protection, LED street lamps using it as a key compo...

AI Technical Summary

Problems solved by technology

Although this design method simplifies the difficulty of design, however, the large-angle light emitted by the LED light source is prone to total reflection inside the lens, resulting in waste of large-angle light and reducing the utilization efficiency of the LED light source.

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