Provided is an image-capturing optical system including a first lens group that includes a first lens having a positive refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power arranged in this order starting from an object side or that includes a first lens having a negative refractive power and a second lens having a positive refractive power arranged in this order starting from the object side, the first lens group having a negative refractive power as a whole, at least one on-axis luminous flux regulating diaphragm, and a second lens group that has a positive refractive power. A surface of at least one of the lens that are included in the first lens group and that have the negative refractive power, the surface being located on the object side, is a convex surface in a paraxial region and has an aspherical surface having a shape with which convex power decreases with increasing distance from an optical axis. A surface of the second lens group on the most image side has a convex shape toward the image side in a paraxial region. The image-capturing optical system satisfies the following conditional expressions (1) to (3): −1.30<−0.6Di/tanω/100<−0.42ω≤120° where f is a focal length of an entire lens system, fn is a focal length of a negative lens of the first lens group, Di is a distortion at a maximum angle of view (unit: %), and ω: an incident angle of a maximum angle of view light beam on the object side.


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    Title :

    IMAGING OPTICAL SYSTEM, IMAGING DEVICE, AND VEHICLE


    Additional title:

    OPTISCHES ABBILDUNGSSYSTEM, ABBILDUNGSVORRICHTUNG UND FAHRZEUG
    SYSTÈME OPTIQUE D'IMAGERIE, DISPOSITIF D'IMAGERIE ET VÉHICULE


    Contributors:

    Publication date :

    2024-04-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    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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