led motorcycle headlamp combined lens

Abstract

The invention discloses a combined lens for an LED motocycle headlamp. The combined lens comprises high beam lamp and lower beam lamp light combined lens free-form surfaces, each optical lens is composed of a double free-form hook face and a single free-form hook face, the optical lens of a high beam lamp is placed in front of a chip, and the optical lens of a lower beam lamp is placed in front of a reflection cup. The deterministic processes of the hook faces include the steps of building a rectangular coordinate system, determining oval zones and semi-circle zones which use illumination face center points as centers, conducting energy dividing on the oval zones and the semi-circle zones, obtaining energy ratios accounted by the single free-form hook faces and the double free-form hook faces, and calculating the light outlet angle of the chip and the mapping relation of a target plane; and then obtaining coordinate values of points on the double free-form hook faces and the single free-form hook faces, combining the obtained points, conducting modeling, and then obtaining a model solid. The combined lens overcomes the defects that in an existing motocycle lens illumination technology, dispersion is serious, the color temperature is slightly high, and the lighting effect using rate is low.

Description

technical field [0001] The invention relates to the technical field of LED motorcycle lamp lighting, in particular to a combined lens for low beam and high beam of LED motorcycles. Background technique [0002] Due to the continuous breakthrough of LED chip technology and the improvement of packaging technology, the luminous efficiency of LED has been continuously improved. The small size, light weight, high stability and high luminous efficiency of LED chips are increasingly recognized and loved by all walks of life. In recent years, more and more attention has been paid to the application of LEDs in the field of motor vehicle lighting, especially in the field of motorcycle headlights using LED light sources. Since the luminous model of the LED chip is approximately a cosine radiator, the optical characteristics are different from those of traditional motorcycles. The incandescent filament light source makes the LED light source face more complicated optical design problems...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems mentioned above, and provides LED headlights for motorcycles. The light distribution requirements solve the optical design problem of using LED light sources, and use a combined lens with double free-form surfaces and single free-form surfaces to solve both the problem of high color temperature and the problem of spot illumination

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