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 reflection unit, a double-telecentric lens, a light splitting device and an imaging lens which are sequentially arranged according to a light emitting direction, the light splitting device needs to be arranged on the image plane of the double-telecentric lens and is configured to reflect light beams used for imaging in the light beams emitted by theimage generation unit, the double-telecentric lens is configured to be used for adjusting the size of the projection image, and the imaging lens is configured to be used for adjusting virtual image distance of projection image and outputting light beam of projection image so as to realize projection imaging. According to the projection optical system provided by the embodiment of the invention, the size of the image can be flexibly adjusted through the double-telecentric lenses, and the virtual image distance of the image can be flexibly adjusted through the imaging lens; and the projection optical system can be applied to head-up display devices of different types of automobiles, and is good in imaging effect, small in size and low 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,其包括按出光方向依次设置的图像生成单元、反射单元、双远心镜头、分光装置和成像镜头,所述分光装置需要设置在所述双远心镜头的像面处且配置为反射出射所述图像生成单元所出射的光束中用于成像的光束,所述双远心镜头配置为可用于调整所述投影图像的尺寸,所述成像镜头配置为可用于调整所述投影图像的虚像距离,并输出所述投影图像的光束以实现投影成像,本发明实施例提供的投影光学系统可通过所述双远心镜头灵活调节图像的尺寸,通过成像镜头灵活调节图像的虚像距离,能够应用于不同类型的汽车的抬头显示装置中,且成像效果好、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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