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    DEVICES AND METHODS FOR PERFORMING HIGH-HARMONIC DIFFRACTIVE LENS COLOR COMPENSATION
    3.
    发明公开
    DEVICES AND METHODS FOR PERFORMING HIGH-HARMONIC DIFFRACTIVE LENS COLOR COMPENSATION 审中-公开

    公开(公告)号：US20240142790A1

    公开(公告)日：2024-05-02

    申请号：US18276105

    申请日：2022-02-05

    申请人： Arizona Board of Regents on Behalf of the University of Arizona

    发明人： Thomas D. Milster ,  Young-Sik Kim ,  Zichan Wang

    IPC分类号： G02B27/42 ,  G02B5/18 ,  G02B27/00

    CPC分类号： G02B27/4211 ,  G02B5/1876 ,  G02B27/0056

    摘要： Devices and methods are provided for performing color correction of focal dispersion in high-harmonic lenses. The device comprises a multi-order diffractive engineered surface (MODE) lens comprising a MODE primary lens having height transitions in the front surface that segment it into annular zones and a color corrector comprising a diffractive Fresnel lens (DFL). Polychromatic light passing through the MODE primary lens experiences LCA that is corrected by the color corrector. The color corrector can be configured to correct Type 1 LCA resulting from a combined effect of the DFL and a refractive index change versus wavelength associated with material comprising the device that together produce a change in focus of the polychromatic light, as well as Type 2 LCA resulting from a cyclic variation in focal length versus wavelength caused by the abrupt changes in the height of the front surface of the MODE primary lens at the transitions.

    ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME
    8.
    发明申请
    ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME 审中-公开

    公开(公告)号：US20180039051A1

    公开(公告)日：2018-02-08

    申请号：US15657501

    申请日：2017-07-24

    申请人： CANON KABUSHIKI KAISHA

    发明人： Kohei Kimura

    IPC分类号： G02B15/20 ,  G02B27/00 ,  G02B15/167

    CPC分类号： G02B15/20 ,  G02B5/0883 ,  G02B15/167 ,  G02B15/173 ,  G02B27/0025 ,  G02B27/4211

    摘要： A zoom lens includes, in order from an object side to an image side, a positive first lens unit, a negative second lens unit, a middle lens group including at least one lens unit, a negative N minus second lens unit, a negative N minus first lens unit, and a positive Nth lens unit, where N is an integer of six or more, in which distances between the adjacent lens units change during zooming, the first lens unit moves toward the object side during zooming from a wide-angle end to a telephoto end, the N minus second lens unit moves during focusing, and a total lens length at the wide-angle end, a backfocus at the wide-angle end, and a lateral magnification of a combined system of the N minus first lens unit and the Nth lens unit at the wide-angle end are set appropriately.

    INFRARED IMAGING SYSTEM AND METHOD OF OPERATING
    9.
    发明申请
    INFRARED IMAGING SYSTEM AND METHOD OF OPERATING 审中-公开

    公开(公告)号：US20180013965A1

    公开(公告)日：2018-01-11

    申请号：US15714527

    申请日：2017-09-25

    申请人： SONY CORPORATION

    发明人： Muhammad ATIF ,  Muhammad SIDDIQUI ,  Christian UNRUH ,  Markus KAMM

    IPC分类号： H04N5/33 ,  G02B27/00 ,  H04N9/04 ,  H04N9/083

    CPC分类号： H04N5/332 ,  G02B13/14 ,  G02B27/005 ,  G02B27/0075 ,  G02B27/4211 ,  H04N5/3572 ,  H04N9/045 ,  H04N9/07 ,  H04N9/083

    摘要： A lens unit (120) shows longitudinal chromatic aberration and focuses an imaged scene into a first image for the infrared range in a first focal plane and into a second image for the visible range in a second focal plane. An optical element (150) manipulates the modulation transfer function assigned to the first and second images to extend the depth of field. An image processing unit (200) may amplify a modulation transfer function contrast in the first and second images. A focal shift between the focal planes may be compensated for. While in conventional approaches for RGBIR sensors contemporaneously providing both a conventional and an infrared image of the same scene the infrared image is severely out of focus, the present approach provides extended depth of field imaging to rectify the problem of out-of-focus blur for infrared radiation. An imaging system can be realized without any apochromatic lens.