The invention relates to a vehicle rearview mirror, in particular to L sight lens (an L lens for short) for increasing the view of a vehicle. According to the technical scheme, a longitudinal curvature radius and a standard curvature radius of a wide-angle lens surface arranged according to an L shape in the longitudinal direction are the same, and a constant value view-increased curvature radius is adopted as the transverse curvature radius; and the transverse curvature radius and the standard curvature radius of a wide-angle lens surface arranged according to an L shape in the transverse direction are the same, and a constant value view-increased curvature radius is adopted as the longitudinal curvature radius. A longitudinal view-increased curvature radius transversely arranged at the time and a transverse view-increased curvature radius longitudinally arranged at the time are adopted as the longitudinal curvature radius and the transverse curvature radius at the corner of the wide-angle lens surface arranged according to an L shape, and multi-order smooth treatment is carried out on generated curve surface connection positions. By means of the scheme, the designed L lens enables the view to be wider, and influences on senses of a driver are avoided.


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    Title :

    L lens curvature radius scheme


    Contributors:
    ZHAO HONG (author)

    Publication date :

    2015-11-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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