The invention provides a projection lens, a projection device, a display device and a vehicle. The projection lens comprises a first lens group, a diaphragm and a second lens group which are sequentially arranged along a projection light path. The first lens group is used for refracting the first image light and emitting the second image light to the diaphragm. The diaphragm is used for transmitting the second image light. The second lens group is used for refracting the second image light and emitting third image light. Wherein the first image light, the second image light and the third image light respectively bear a first image, a second image and a third image, and the third image is an image obtained after the long side and the short side of the first image are amplified by different amplification factors. The projection lens provided by the invention can realize different amplification factors for long and short edges of an image, and when the projection lens is applied to a projection device, the utilization efficiency of image light can be improved, and the loss of the image light is reduced.

    本申请提供了一种投影镜头、投影装置、显示装置和交通工具。该投影镜头包括沿投影光路依次设置的第一透镜群、光阑、第二透镜群。其中,第一透镜群用于对第一图像光进行折射,并出射第二图像光至光阑。光阑用于透过第二图像光。第二透镜群用于对第二图像光进行折射,并出射第三图像光。其中,第一图像光、第二图像光以及第三图像光分别承载第一图像、第二图像和第三图像,且第三图像为将第一图像的长边和短边进行不同放大倍率放大后得到的图像。本申请提供的投影镜头能够实现对图像长短边不同的放大倍率,当应用于投影装置时,可以提高图像光的利用效率,减少对图像光的损失。


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    Title :

    Projection lens, projection device, display device and vehicle


    Additional title:

    一种投影镜头、投影装置、显示装置和交通工具


    Contributors:
    FANG ZHIFANG (author) / ZHAO HAN (author)

    Publication date :

    2023-09-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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