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    • 91. 发明授权
    • Imaging lens
    • US11899174B2
    • 2024-02-13
    • US17038115
    • 2020-09-30
    • TOKYO VISIONARY OPTICS CO., LTD.
    • Yukio Sekine
    • G02B13/00G02B9/64
    • G02B13/0045G02B9/64
    • There is provided a compact and high-resolution imaging lens at a low cost.
      The imaging lens comprises in order from an object side to an image side, a first lens having positive refractive power and a convex surface facing the object side near an optical axis, a second lens having negative refractive power and a meniscus shape having the convex surface facing the object side near the optical axis, a third lens having the positive or the negative refractive power, a fourth lens having the convex surface facing the image side near the optical axis, a fifth lens having the positive refractive power, a sixth lens having the positive refractive power, and a seventh lens having the negative refractive power and a concave surface facing the image side near the optical axis, the image side surface of said seventh lens is formed as an aspheric surface which changes to the convex surface at a peripheral area, the object-side surface of said fifth lens has the convex surface facing the object side near the optical axis, all lenses are single lenses arranged with an interval between lenses adjacent to each other, and below conditional expressions (1), (2) and (3) are satisfied:

      (1) 1.50
    • 92. 发明授权
    • Imaging lens
    • US11874440B2
    • 2024-01-16
    • US17038122
    • 2020-09-30
    • TOKYO VISIONARY OPTICS CO., LTD.
    • Yukio Sekine
    • G02B13/00G02B9/64
    • G02B13/0045G02B9/64
    • There is provided a compact and high-resolution imaging lens at a low cost.
      The imaging lens comprises in order from an object side to an image side, a first lens having positive refractive power and a convex surface facing the object side near an optical axis, a second lens having negative refractive power and a meniscus shape having the convex surface facing the object side near the optical axis, a third lens having the positive or the negative refractive power, a fourth lens having the convex surface facing the image side near the optical axis, a fifth lens having the positive refractive power, a sixth lens having the positive refractive power, and a seventh lens having the negative refractive power and a concave surface facing the image side near the optical axis, the image side surface of said seventh lens is formed as an aspheric surface which changes to the convex surface at a peripheral area, the object-side surface of said fifth lens has the convex surface facing the object side near the optical axis, all lenses are single lenses arranged with an interval between lenses adjacent to each other, and below conditional expressions (1), (2) and (3) are satisfied:

      1.50