阅读说明：本技术 一种汽车前照灯光学系统 (Optical system of automobile headlamp ) 是由 邓云龙 杨芮牧 尹淼 邓华秋 于 2019-10-11 设计创作，主要内容包括：本发明公开了一种汽车前照灯光学系统,包括近光灯单元及远光灯单元,所述近光灯单元由多个近光灯模块构成,所述近光灯模块包括LED光源、椭球形反射器、抛物面形反射器、遮光板及平凸透镜；所述LED光源设置在椭球形反射器的第一焦点上,遮光板设置椭球形反射器的第二焦点位置,且位于椭球形反射器及平凸透镜之间；所述远光灯单元由多个远光灯模块构成,所述远光灯模块包括N个LED光源、N个结构相同的反射器及矩形平凸透镜,本发明使得整个远光灯系统具有分域配光能力。之后通过远光灯的自由排列,进一步实现了远近光灯的一体化。灯具结构紧凑,光效高,近光灯满足法规要求,远光灯实现矩形光斑像素级照明。(The invention discloses an optical system of an automobile headlamp, which comprises a dipped headlight unit and a high beam unit, wherein the dipped headlight unit consists of a plurality of dipped headlight modules, and each dipped headlight module comprises an LED light source, an ellipsoidal reflector, a paraboloid-shaped reflector, a light screen and a plano-convex lens; the LED light source is arranged on a first focus of the ellipsoidal reflector, and the light shielding plate is arranged at a second focus position of the ellipsoidal reflector and is positioned between the ellipsoidal reflector and the plano-convex lens; the high beam lamp unit is composed of a plurality of high beam lamp modules, each high beam lamp module comprises N LED light sources, N reflectors with the same structure and a rectangular plano-convex lens, and the whole high beam lamp system has the regional light distribution capability. And then, the high beam and the low beam are freely arranged, so that the integration of the high beam and the low beam is further realized. The lamp has compact structure and high lighting effect, the dipped headlights meet the requirements of regulations, and the high beam lights realize pixel-level illumination with rectangular light spots.)

1. An optical system of a vehicle headlight, which is characterized by comprising a dipped headlight unit and a high beam unit,

the dipped headlight unit consists of a plurality of dipped headlight modules, and each dipped headlight module comprises an LED light source, an ellipsoidal reflector, a paraboloid-shaped reflector, a light shielding plate and a plano-convex lens; the LED light source is arranged on a first focus of the ellipsoidal reflector, light emitted by the LED light source is reflected by the ellipsoidal reflector and the parabolic reflector, and the light shielding plate is arranged at a second focus position of the ellipsoidal reflector and is positioned between the ellipsoidal reflector and the plano-convex lens;

the high beam unit comprises a plurality of high beam modules, the high beam modules include LED light source, N reflectors that the structure is the same and rectangle plano-convex lens, N reflectors that the structure is the same apart from parallel arrangement, N is the natural number, according to the light path direction, the sectional area of N reflectors crescent, the light emitting area center of LED light source is located the focus department of first reflector, and N reflectors that the structure is the same all enclose by four paraboloids quadrature and close and constitute.

2. The optical system for automotive headlamps as claimed in claim 1, characterized in that said low beam unit is constituted by six low beam modules and said high beam unit is constituted by ten high beam modules, said ten high beam modules being arranged around the low beam unit.

3. An optical system for automotive headlamps according to claim 2, characterized in that vertical light screens are provided on both sides of each low beam module.

4. The optical system of claim 1, wherein the four paraboloids are equal in length, each paraboloid has five sections, the focal lengths of the sections are respectively 0.3mm, 0.4mm, 0.5mm, 0.6mm and 0.7mm, and the ideal vertex of each section of each paraboloid is equal.

5. The optical system of claim 1, wherein the rectangular plano-convex lens has a length and a width of 20mm and is spaced from the nth reflective cavity by 1 mm.

6. The optical system for automotive headlamps as claimed in claim 1, characterized in that said rectangular plano-convex lens has a rectangular outer shape, a spherical surface shape, a flat first surface, a curvature radius of a second surface of 78mm, and a lens thickness of 6 mm.

7. The optical system of claim 6, wherein one side of the plano-convex lens is a flat surface which is 115mm away from the LED light source and has a center which is shifted downward by 2.1mm, and the other side is a spherical surface having a radius of curvature of 36.1mm, and a thickness of the lens is 13 mm.

Technical Field

The invention relates to the field of optical design, in particular to an optical system of an automobile headlamp.

Background

The LED is a mainstream automobile headlamp light source in the future, and has the advantages of high luminous efficiency, long service life, energy conservation, environmental protection, small volume, good shock resistance, high response speed and the like.

At night, the light distribution effect of the automobile headlamp has great influence on the driving safety of a driver, and the occurrence probability of traffic accidents at night can be effectively reduced due to the good light distribution shape of the headlamp. For an automobile headlamp using a common LED (a light source similar to a surface light source and lambertian light with a light emitting field of 180 °) as a light source, GB25991-2010 "LED headlamp for an automobile" has a detailed specification. On the premise of satisfying the requirements, it is a very important subject to be studied to continuously improve the light distribution effect of the head lamp and to improve the illumination efficiency as much as possible, including the very practical area-divided light distribution illumination (matrix illumination) which appears in recent years.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides an optical system of an automobile headlamp.

The invention adopts the following technical scheme:

an optical system of a vehicle headlight comprises a dipped headlight unit and a high beam unit,

the dipped headlight unit consists of a plurality of dipped headlight modules, and each dipped headlight module comprises an LED light source, an ellipsoidal reflector, a paraboloid-shaped reflector, a light shielding plate and a plano-convex lens; the LED light source is arranged on a first focus of the ellipsoidal reflector, light emitted by the LED light source is reflected by the ellipsoidal reflector and the parabolic reflector, and the light shielding plate is arranged at a second focus position of the ellipsoidal reflector and is positioned between the ellipsoidal reflector and the plano-convex lens;

the high beam unit comprises a plurality of high beam modules, the high beam module includes LED light source, a N reflector and rectangle plano-convex lens that the structure is the same, N reflector interval the same distance parallel arrangement that the structure is the same, but the optical axis three-dimensional fine setting of every structure, N are the natural number, according to the light path direction, the sectional area crescent of a N reflector, the light emitting area center of LED light source is located the focus department of first reflector, and N reflectors that the structure is the same all enclose by four paraboloids quadrature and close and constitute.

The dipped headlight unit consists of six dipped headlight modules, the high beam unit consists of ten high beam modules, which are arranged around the dipped headlight unit.

In the invention, vertical light shielding plates are arranged on two sides of each dipped headlight module.

The four paraboloids are the same in length, each paraboloid is provided with five sections, the focal length of each section is 0.3mm, 0.4mm, 0.5mm, 0.6mm and 0.7mm respectively, and the ideal vertex of each section of each paraboloid is the same.

The length and width of the rectangular plano-convex lens are both 20mm, and the rectangular plano-convex lens and the Nth reflection cavity are spaced by 1 mm.

The rectangular plano-convex lens is rectangular in shape, the surface type is a spherical surface, the first surface is a plane, the curvature radius of the second surface is 78mm, and the thickness of the lens is 6 mm.

One surface of the plano-convex lens is a plane and is 115mm away from the LED light source, the center of the plano-convex lens is downwardly deviated by 2.1mm, the other surface of the plano-convex lens is a spherical surface, the curvature radius of the plano-convex lens is 36.1mm, and the thickness of the lens is 13 mm.

The invention has the beneficial effects that:

(1) the high-beam LED lamp comprises a dipped headlight unit and a high-beam headlight unit, wherein the lighting efficiency of the dipped headlight reaches 84.90%, and the lighting efficiency of the high-beam headlight reaches 91.73%;

(2) the high beam lamp realizes rectangular light distribution light shape, and the illumination distribution is relatively uniform, so that the whole high beam lamp unit has certain regional light distribution capability;

(3) the low beam lamp structure of the invention adopts an ellipsoidal reflecting cavity for forming the illumination of a 15-degree cut-off line,

drawings

FIG. 1 is a front view of an optical system of an automotive headlamp of the present invention;

FIG. 2 is a general view of FIG. 1;

fig. 3 is a front view of the high beam module of fig. 1;

fig. 4 is a structural view of a high beam module;

FIG. 5 is a side view of the low beam module of FIG. 1;

fig. 6 is a schematic diagram of the arrangement structure of low beam light units.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.