The invention provides a two-piece projection lens with a large numerical aperture, which sequentially comprises a first lens with positive focal power and a convex object side surface from an object side to an imaging side, and the first lens comprises a first light incident surface close to the object side and a first light emergent surface close to the imaging side; the second lens has positive focal power, and the object side surface of the second lens is a convex surface; the second lens comprises a second light incident surface close to the object side and a second light emergent surface close to the imaging side; and at least one of the first light incident surface, the first light emergent surface, the second light incident surface and the second light emergent surface is a diffractive optical surface. The two-piece type projection lens can be applied to projection systems of intelligent pixel headlamps such as automobile headlamps and motorcycle headlamps, the light energy utilization rate is increased by increasing the numerical aperture, the brightness is improved, and the two-piece type projection lens has proper image resolution.

    本发明提供了一种大数值孔径的两片式投影镜头,从物侧到成像侧依次包括:具有正光焦度且物侧面为凸面的第一透镜,所述第一透镜包括靠向物侧的第一入光面以及靠向成像侧的第一出光面;具有正光焦度且物侧面为凸面的第二透镜,所述第二透镜包括靠向物侧的第二入光面以及靠向成像侧的第二出光面;所述第一入光面、第一出光面、第二入光面、第二出光面中,至少有一个面为衍射光学面。本发明的两片式投影镜头,可应用于汽车、摩托车前大灯等智能像素大灯的投影系统,通过提高数值孔径来提高光能利用率,提高亮度,并且具有合适的画像解析度。


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    Title :

    Two-piece projection lens with large numerical aperture


    Additional title:

    一种大数值孔径的两片式投影镜头


    Contributors:
    JIANG CHENG (author) / SHE JUN (author) / NAN JIXUE (author)

    Publication date :

    2022-05-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B62J Fahrrad- oder Motorradsättel oder -sitze , CYCLE SADDLES OR SEATS / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / F21W Index-Schema in Verbindung mit den Unterklassen F21K, F21L, F21S und F21V, betreffend den Gebrauch oder Einsatz von Leuchten oder Beleuchtungssystem , INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K,  F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS



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