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Lens for LED street lamp with equal brightness illumination and design method thereof

A technology of LED street lamp and design method, which is applied to lighting and heating equipment, outdoor lighting, lighting devices, etc., can solve the problem that the target illumination cannot be obtained very accurately.

Active Publication Date: 2016-07-06
CECEP LATTICELIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the design of the LED secondary optical lens is mostly based on the distribution of illumination, and sometimes the target illumination cannot be obtained accurately.

Method used

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  • Lens for LED street lamp with equal brightness illumination and design method thereof
  • Lens for LED street lamp with equal brightness illumination and design method thereof
  • Lens for LED street lamp with equal brightness illumination and design method thereof

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Experimental program
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Embodiment Construction

[0020] See figure 1 with figure 2 , An LED street lamp lens for iso-brightness illumination, comprising an outer curved surface 1, a bottom surface 2 and an LED lamp cavity 3 on the bottom surface;

[0021] The outer curved surface 1 is composed of irregular curved surfaces that are symmetrical about the central axis;

[0022] The LED lamp cavity 3 is a concave hemispherical surface, and the radius of the hemispherical surface is determined by the size of the selected LED lamp beads.

[0023] The design method of LED street lamp lens for iso-brightness lighting is as follows:

[0024] (1) Calculate the target light intensity at each point of the target illumination surface

[0025] a) According to the simplified brightness coefficient table in "Urban Road Lighting Design Standard CJJ45-2006" combined with geometric relations, the simplified brightness coefficients of certain specific points on the lighting surface can be read.

[0026] Set the observation point at a distance of 60m from...

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Abstract

The invention provides an equal-luminance lighting LED street lamp lens and a method for designing the equal-luminance lighting LED street lamp lens. The equal-luminance lighting LED street lamp lens comprises an outer curved face (1), a bottom face (2) and an LED lamp cavity (3) which is arranged on the bottom face. The outer curved face (1) is formed by irregular curved faces which are symmetrical right and left along the central axis. The LED lamp cavity (3) is an inward-concave hemisphere face, and the semi-diameter of the hemisphere face is determined by the size of an LED lamp bead which is selected and used. The outer curved face (1) is a free-form curved face which is worked out by numerical calculating software, objective light intensity of each point of an objective luminous face which is integrated in the program for calculating the free-form curved face is calculated, and therefore the effect that light rays can be refracted by the lens and then precisely illuminate an objective luminous point after being given out is ensured.

Description

Technical field [0001] The invention belongs to the technical field of semiconductor lighting, and in particular relates to a lens for an LED street lamp with constant brightness lighting and a design method thereof. Background technique [0002] After entering the lighting field, LED has quickly become the pride of the lighting industry with its advantages of low energy consumption, high luminous efficiency, fast response, long life and so on. Over the past ten years, the rapid development of LED has become an unstoppable trend in the lighting field. However, the light emitted by LEDs is Lambertian, and it is difficult to directly use for lighting. Secondary optical design is required. Different lighting scenarios have different requirements. Therefore, a new subject-LED secondary optical design-should be applied. Born. The packaging of LED chips is regarded as a primary optical design, and the design of refractive lenses and reflectors based on the results of the primary optic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21V5/04G06F17/50F21W131/103F21Y115/10
Inventor 程治明曾平张志海
Owner CECEP LATTICELIGHTING