An optical lens, an optical module having the optical lens, and an automobile headlight

Abstract

The invention provides an optical lens, an optical module with the optical lens, and an automobile headlamp. The optical lens includes a first optical part, a second optical part, and a third optical part. A light source emits an illuminating beam, and the center of the optical lens The light beam is refracted by the first optical part and the third optical part and then exits in a direction parallel to the optical axis of the third optical part; the divergent beam is refracted and totally reflected by the second optical part and refracted by the third optical part The trailing edge is emitted in a direction parallel to the optical axis of the third optical part. Based on the above configuration, on the one hand, the focal length of the optical lens is enlarged, which is conducive to light condensing, and the outgoing beam is more concentrated, thereby improving the light distribution value; on the other hand, compared with the traditional method, the size of the optical lens is reduced; moreover, Efficient use of light is achieved without any controllable waste of light.

Description

technical field [0001] The invention relates to the field of automobile lamps, in particular to an optical lens, an optical module with the optical lens, and an automobile headlamp. Background technique [0002] Light-emitting diodes (LEDs) are the fourth generation of automotive light sources following incandescent lamps, tungsten-halogen lamps and high-intensity discharge lamps (HID). LED has many advantages such as small size, low energy consumption, fast response, and long life, and conforms to the trend of future automobile development in the direction of compactness, energy saving, safety, and fashion. In recent years, with the continuous expansion of the application of LEDs in automotive lighting systems, more and more problems have been overcome. However, the application of LEDs in automotive headlights is still challenging, that is, the optical characteristics of LEDs are different from traditional automotive light sources, which makes LEDs face complex optical des...

AI Technical Summary

Problems solved by technology

In the case of a constant diameter, the larger the focal length, the stronger the light concentration, but at the same time the utilization efficiency of the light source will decrease; while in the case of a constant focal length, the larger the diameter, the higher the system efficiency. A compromise between lens focal length and diameter

In this case, the following unfavorable results may be caused: (1) the size (thickness and diameter) of the entire lens group is relatively large; (2) the focal length of the lens is limited to a certain extent and cannot be too large, which is very important for realizing the high beam function is not conducive to focusing; (3) limits the system efficiency

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