The embodiment of the invention relates to the technical field of projection optics, and discloses a double-telecentric projection lens, which comprises a front group of lenses, a rear group of lenses and an equivalent prism which are sequentially arranged from an image surface to a DMD chip, wherein the front group lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged in sequence, the rear group lens comprises a sixth lens, a seventh lens, an eighth lens and a ninth lens which are arranged in sequence, and the third lens and the fourth lens form a doublet lens; and the DMD chip is configured to emit two images at the same time, and when the DMD chip emits the two images at the same time, the two images emitted at the same time are imaged at different positions after being emitted by the double telecentric projection lens. The double-telecentric projection lens provided by the embodiment of the invention can be applied to a projection optical system in a head-up display device of an automobile so as to realize simultaneous projection imaging of two pictures, and the imaging effect is good.
本发明实施例涉及投影光学技术领域,公开了一种双远心投影镜头,所述双远心投影镜头包括从像面到DMD芯片之间依次设置的:前组透镜、后组透镜和等效棱镜;其中,所述前组透镜包括依次设置的第一透镜、第二透镜、第三透镜、第四透镜和第五透镜,所述后组透镜包括依次设置的第六透镜、第七透镜、第八透镜和第九透镜,所述第三透镜和所述第四透镜组成一个双胶合透镜;所述DMD芯片配置为同时出射两个图像,且在所述DMD芯片同时出射两个图像时,同时出射的所述两个图像经所述双远心投影镜头出射后成像在不同位置上,本发明实施例提供的双远心投影镜头能够应用于汽车的抬头显示装置中的投影光学系统中,以实现两种画面的同时投影成像,且成像效果好。
Double-telecentric projection lens and head-up display device of automobile
一种双远心投影镜头及汽车的抬头显示装置
2021-05-07
Patent
Electronic Resource
Chinese
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