Headlamp unit based on PBS optical splitter

Abstract

The invention relates to a headlamp unit based on a PBS optical splitter. The headlamp unit comprises a lens and an optical splitter. According to the reverse light path, parallel light is refracted twice through an incident plane and an image plane of the lens, passes through the optical splitter, and is gathered at two or more focal points, each point corresponds to one optical path system, and all the optical path systems can be opened simultaneously or opened individually to obtain corresponding headlamp light types. Through combination of the PBS optical splitter, light source can be opened and closed in combination through the two optical systems, thus different lighting light types are achieved, and the two optical systems are not in interference with each other; at least two precise focal points are obtained for lens focus through the PBS optical splitter, and ideal light types can be obtained; and the full beam headlight type can cover the dipped headlight type partially, and the situation that brightness mutation exists in the light type joints can be avoided.

Description

technical field [0001] The invention relates to a headlamp of a vehicle lamp, specifically, a headlamp unit based on a PBS beam splitter. Background technique [0002] Existing headlight lenses such as figure 1 As shown, it is generally a collimating lens with a single focus. Therefore, only one light shape can be imaged. When two light shapes are imaged through a lens at the same time, such as the far and near light integrated lighting unit, a light shield with a switchable position is generally required to be used for far and near. light switch. Since the position switching process of the shading plate needs to be realized by mechanical movement, it brings a series of defects such as noise and wear. [0003] In the existing technology, there is also a light source switch to realize the switching of far and near beams. The far and near beams are respectively equipped with light sources. However, since there is only one lens focus, it is difficult to splice the ideal ligh...

AI Technical Summary

Problems solved by technology

Since the position switching process of the shading plate needs to be realized by mechanical movement, it brings a series of defects such as noise and wear.

[0003] In the existing technology, there is also a light source switch to realize the switching of far and near beams. The far and near beams are respectively equipped with light sources. However, since there is only one lens focus, it is difficult to splice the ideal lighting light shape integrating far and near beams; at the same time, Because the high-beam lighting system cannot illuminate the low-beam area, there is an obvious brightness mutation at the junction of the high-beam and low-beam lighting shapes

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