Design method for optical lens for LED automobile front fog lamp

A technology of optical lens and design method, which is applied in the direction of headlights, light sources, motor vehicles, etc.

Active Publication Date: 2016-02-24
ZHONGSHAN INST OF MODERN IND TECH SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the application of LEDs in automotive front fog lamps is still chall

Method used

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  • Design method for optical lens for LED automobile front fog lamp
  • Design method for optical lens for LED automobile front fog lamp
  • Design method for optical lens for LED automobile front fog lamp

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Experimental program
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Embodiment Construction

[0042] The present invention will be described in detail below with reference to the drawings and specific embodiments, but the implementation and protection of the present invention are not limited thereto.

[0043] 1. Establish a coordinate system and set initial conditions, and evenly divide the solid angle of the LED light source

[0044] First, like figure 1 As shown, a coordinate system with the center of the light-emitting surface 101 of the LED light source as the coordinate origin O is established, the plane where the light-emitting surface of the LED light source is located is the xoy plane, the axis passing through the origin and perpendicular to the xoy plane is the z-axis, and the positive direction of the z-axis is the light Axis direction. The point of intersection with the z-axis is O'(the distance between the origin O and the point O'is 25m) and the plane parallel to the plane xoy is the target illumination surface 200, and the point O'is the center point of the t...

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Abstract

The invention discloses a design method for an optical lens for an LED automobile front fog lamp. A cavity for holding an LED light source is formed in the lens. The LED light source emits light right towards the cavity of the lens. The light from the central portion of an LED firstly penetrates through a spherical surface on the top of the inner wall of the cavity, and the direction of the light does not change when the light enters the lens; then the light is refracted on a free-form surface in the middle of the top of the outer side of the lens to form emergent light irradiating an illumination surface. The light from the edge portion of the LED is firstly refracted on a columnar surface of the inner wall of the cavity of the lens to enter the lens, then is totally reflected on a total reflection free-form surface on the outer side of the lens, and finally is refracted on a ring plane of the top edge of the lens to irradiate the illumination surface. The lens is simple and compact in structure, small in size, high in light energy utilization rate and low in glare effect, and the light distribution requirement of the automobile front fog lamp at the 'F3' level in the Economic Commission for Europe Regulation 19 Revision 15 (ECE R19 Rev15) is met.

Description

Technical field [0001] The invention relates to the field of LED automotive lighting, and particularly relates to a free-form surface optical lens design method for LED automotive front fog lamps. Background technique [0002] Light-emitting diodes (LEDs) have the advantages of long life, high efficiency, fast response, and small size. In recent years, they have been widely used in the field of vehicle lighting. With the continuous innovation of LED technology, LED car lights will be the development trend of vehicle lighting applications in the future. However, the application of LEDs to automobile front fog lamps is still quite challenging, and the light energy utilization rate needs to be further improved. [0003] The United Nations Economic Commission for Europe Automobile Regulations (ECER19Rev15) has made very detailed definitions and requirements for the light distribution performance of automobile front fog lamps. The original front fog lamp, that is, the "B" class front ...

Claims

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Application Information

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IPC IPC(8): F21V5/04F21W101/02F21W101/10F21Y115/10F21W107/10
CPCF21S41/141F21S41/25F21W2102/00F21W2107/10
Inventor 葛鹏寇灵梅李秀丰王洪
Owner ZHONGSHAN INST OF MODERN IND TECH SOUTH CHINA UNIV OF TECH
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