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Lens, automobile lamp lens system and automobile

A lens and sawtooth technology, applied in the field of automobile headlamps, can solve problems such as chromatic dispersion, achieve the effect of eliminating chromatic dispersion, improving reddish or bluish, and high precision

Inactive Publication Date: 2021-02-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a lens, a car light lens system and an automotive

Method used

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  • Lens, automobile lamp lens system and automobile
  • Lens, automobile lamp lens system and automobile
  • Lens, automobile lamp lens system and automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, in the lens 1a provided by Embodiment 1 of the present invention, the cross-section of the lens 1a is meniscus-shaped, and the lens 1a includes a first surface 11a and a second surface 12a.

[0033] The first surface 11a is a binary surface, and the second surface 12a is a smooth surface.

[0034] The binary surface includes a base surface and a plurality of serrations 13a spaced apart from each other formed on the base surface.

[0035] In the lens 1a provided by Embodiment 1 of the present invention, since the dispersion coefficient of the smooth surface is a positive number, while the dispersion coefficient of the binary surface has nothing to do with the material, and the dispersion coefficient of the binary surface is a negative number, by setting the first surface 11a to two The element surface can make the dispersion coefficient of the binary surface and the dispersion coefficient of the smooth surface cancel each other, so as to elimi...

Embodiment 2

[0058] Such as figure 2 As shown, the difference between the lens 1b provided by Embodiment 2 of the present invention and Embodiment 1 is that the first surface 11b of the lens 1b is a smooth surface, and the second surface 12b of the lens 1b is a binary surface, so as to form the The lens 1b.

[0059] In the lens 1b provided by Embodiment 2 of the present invention, by setting the second surface 12b as a binary surface, the dispersion coefficient of the binary surface and the dispersion coefficient of the refracting surface can cancel each other, so as to eliminate the dispersion and improve the reddish or near cut-off line. Blue issue. In addition, since the size of the sawtooth 13b on the binary surface is nanoscale, it cannot be observed by human eyes and does not affect the appearance of the lens. Compared with the existing Fresnel lens, the lens 1b of the embodiment of the present invention has a The proportion of the working surface is relatively large, and the non-...

Embodiment 3

[0061] Such as image 3 As shown, the lens 1c provided by Embodiment 3 of the present invention includes a first surface 11c and a second surface 12c, the first surface 11c of the lens 1c is a binary surface, and the second surface 12c is a smooth surface.

[0062] The difference from Embodiment 1 is that on the binary surface, the width of the multiple serrations 13c along the radial direction of the lens gradually decreases from the center of the lens 1c to the edge of the lens, and the multiple The heights of the serrations 13c along the axial direction of the lens 1c are consistent to form a binary surface of the lens 1c.

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Abstract

The invention belongs to the technical field of automobile headlamps, and relates to a lens, an automobile lamp lens system and an automobile. The cross section of the lens is in a crescent shape, andthe lens comprises a first surface and a second surface. One of the first surface and the second surface is a binary surface, and the other one is a smooth surface; and the binary surface comprises abase surface and a plurality of sawteeth which are formed on the base surface at intervals. The lens can eliminate chromatic dispersion, improve the problem that a cut-off line accessory is slightlyred or slightly blue, meanwhile, stray light cannot be generated at the edge of the lens, and the lighting effect is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of automobile headlamps, and in particular relates to a lens, an automobile lamp lens system and an automobile. Background technique [0002] Projection headlamp systems are widely used due to their clear cut-off lines and compact size. The projected headlight system mainly includes a light source, a reflective bowl, a baffle and a lens. The surface shape of the reflective bowl is generally composed of an ellipsoid or a variable ellipsoid. The reflected light is reflected, so that the reflected light converges to the second focal point of the reflective bowl, so as to realize the convergence of the light emitted by the light source. The baffle is used to form the clear cut-off line, and the lens is used to magnify the light pattern to a certain extent and project it onto the road. In projection headlamp systems, plano-convex aspheric lenses are commonly used as lenses. However, due to the large diameter, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S41/275F21S41/00F21S41/30F21W107/10
CPCF21S41/00F21S41/275F21S41/30F21W2107/10
Inventor 李红蒋金波周美华孙亚轩宋新新
Owner BYD CO LTD
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