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    • 6. 发明申请
    • IMAGE-CAPTURING OPTICAL SYSTEM, IMAGE-CAPTURING DEVICE, AND VEHICLE
    • US20230119358A1
    • 2023-04-20
    • US17905493
    • 2021-03-04
    • KYOCERA Corporation
    • Atsushi YAMAZAKI
    • G02B13/18G02B9/10
    • 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