An embodiment of the invention relates to the technical field of projection optics, and discloses a projection optical system applied to a head-up display device of an automobile. The projection optical system comprises an image generation unit, a first reflection unit, a double-telecentric lens, a light splitting device, a first lens, a second reflection unit, a second lens and a controller connected with the image generation unit and the light splitting device which are sequentially arranged in a light emitting direction, wherein the light splitting device is fan-shaped in the overlooking direction and is arranged on the image surface of the double-telecentric lens; and the controller is configured to control the light splitting device to swing to a first angle to enable the first imageto be emitted and imaged through the first lens when controlling the image generation unit to emit the first image, and control the light splitting device to swing to an initial position to enable thesecond image to be emitted and imaged through the second lens when controlling the image generation unit to emit the second image. According to the projection optical system provided by the embodiment of the invention, different display contents and pictures can be respectively realized at two different positions in a sequential control mode, and the projection optical system is small in size andlow in cost.
本发明实施例涉及投影光学技术领域,公开了一种应用于汽车的抬头显示装置的投影光学系统,包括按出光方向依次设置的图像生成单元、第一反射单元、双远心镜头、分光装置、第一镜头、第二反射单元、第二镜头、与图像生成单元和分光装置连接的控制器,分光装置在俯视方向上为扇形且设置在所述双远心镜头的像面处,控制器配置为在控制图像生成单元出射第一图像时控制分光装置摆动至第一角度使第一图像通过第一镜头出射成像,在控制图像生成单元出射第二图像时控制摆动至初始位置使第二图像通过第二镜头出射成像,本发明实施例提供的投影光学系统通过分时序控制的方式能够在两个不同的位置分别实现不同的显示内容和画面,且体积小、成本低。
Projection optical system and head-up display device of automobile
一种投影光学系统及汽车的抬头显示装置
2021-03-30
Patent
Electronic Resource
Chinese
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