OBJECTIVE LENS, OPTICAL SYSTEM, AND MICROSCOPE

    公开(公告)号:US20230408804A1

    公开(公告)日:2023-12-21

    申请号:US18240658

    申请日:2023-08-31

    申请人: NIKON CORPORATION

    IPC分类号: G02B21/02 G02B9/14 G02B21/33

    CPC分类号: G02B21/02 G02B9/14 G02B21/33

    摘要: An objective lens (OL) comprises, disposed in order from an object: a positive lens (L11); a negative meniscus lens (L12) cemented to the positive lens (L11) and having a concave surface facing the object; and a positive meniscus lens (L13) having a concave surface facing the object; wherein the objective lens satisfies following conditional expressions 2.03≤n1m≤2.30 and 20≤ν1m, where, n1m: a refractive index of the negative meniscus lens (L12) with respect to a d-line, and ν1m: an Abbe number of the negative meniscus lens (L12).

    Camera optical lens
    64.
    发明授权

    公开(公告)号:US11366292B2

    公开(公告)日:2022-06-21

    申请号:US17134507

    申请日:2020-12-28

    发明人: Yunjie Liu

    摘要: A camera optical lens is provided, including from an object side to an image side: a first lens having positive refractive power; a second lens having negative refractive power; and a third lens having positive refractive power, wherein the camera optical lens satisfies following conditions: 0.75≤f1/f≤0.95; 1.20≤f3/f≤2.00; 0≤(R1+R2)/(R1−R2)≤0.80; −3.50≤(R3+R4)/(R3−R4)≤−1.50; −8.00≤(R5+R6)/(R5−R6)≤−2.50; and 1.50≤d5/d4≤4.00. The above camera optical lens can meet design requirements for large aperture, wide angle and ultra-thinness while maintaining good imaging performance.

    OPTICAL IMAGE CAPTURING SYSTEM
    65.
    发明申请

    公开(公告)号:US20220003965A1

    公开(公告)日:2022-01-06

    申请号:US17121035

    申请日:2020-12-14

    摘要: The invention discloses a three-piece optical lens for capturing image and a three-piece optical module for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with positive refractive power; a second lens with refractive power; and a third lens with refractive power; and at least one of the image-side surface and object-side surface of each of the three lens elements are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.

    Large-aperture optical lens with three lens pieces

    公开(公告)号:US11204482B1

    公开(公告)日:2021-12-21

    申请号:US17237367

    申请日:2021-04-22

    摘要: An optical lens is provided with three lens pieces. The optical lens includes a diaphragm, a first lens piece having positive focal power, a second lens piece having negative focal power and a third lens piece having positive focal power, arranged in sequence. The first lens piece has an S1 surface and an S2 surface. The second lens piece has an S3 surface and an S4 surface. The third lens piece has an S5 surface and an S6 surface. An S7 surface is provided on a side of the S6 surface away from the S5 surface. A lens frame is provided at the S6 surface or between the S6 and S7 surfaces. The calibers of the Si to S7 surfaces sequentially decrease. An equivalent focal length of the first lens piece is larger than that of the third lens piece. A numerical aperture of the lens is larger than 0.6.

    CAMERA OPTICAL LENS
    67.
    发明申请

    公开(公告)号:US20210048619A1

    公开(公告)日:2021-02-18

    申请号:US16991054

    申请日:2020-08-12

    发明人: Xuqi Bian Jia Chen

    IPC分类号: G02B13/00 G02B9/14 G02B27/00

    摘要: Provided is a camera optical lens including, sequentially from an object side to an image side: 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. The camera optical lens satisfies: −0.80≤f1/f≤1.10; 0.30≤d3/d5≤1.00; −20.00≤(R5+R6)/(R5−R6)≤−10.00; 5.00≤R2/f≤50.00; and −10.00≤(R3+R4)/(R3−R4)≤−4.00, where f and f2 denote focal lengths of the camera optical lens and the first lens, respectively; R2, R4 and R6 denote curvature radiuses of image side surfaces of the first, second and third lenses, respectively; R3 and R5 denote curvature radiuses of object side surfaces of the second and third lenses, respectively; d3 denotes an on-axis thickness of the second lens; and d5 denotes an on-axis thickness of the third lens. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses.

    Optical zoom system and method for its use

    公开(公告)号:US10484615B2

    公开(公告)日:2019-11-19

    申请号:US15892647

    申请日:2018-02-09

    摘要: A camera head is provided that includes a first lens group, including at least one deformable lens with variable curvature, a second lens group moveable relative to the first lens group, and an image sensor for capturing a light beam received from an endoscope, wherein the first lens group is fixed relative to the image sensor and the aperture of the first lens group is smaller than the aperture of the second lens group. A method is also provided for capturing of an image utilizing a zoom system including a variable power first lens group and a movable second lens group.