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    Optical systems and associated detecting means
    4.
    发明授权
    Optical systems and associated detecting means 失效

    公开(公告)号：US3864566A

    公开(公告)日：1975-02-04

    申请号：US68506257

    申请日：1957-09-18

    Applicant: AMERICAN OPTICAL CORP

    Inventor： SIMPSON GEORGE R ,  MACNEILLE STEPHEN M

    IPC: G02B17/02 ,  G02B23/00 ,  H04J3/14

    CPC classification number: G02B23/00 ,  G02B19/0028 ,  G02B19/008

    Abstract: 1. An opaque main supporting housing and a said light-collecting and detecting system disposed within said main supporting housing at a location intermediate the spaced opposite ends thereof said housing surrounding said light-collecting and detecting system and said system being arranged to simultaneously view from said location all parts of a predetermined endless annular object field outwardly of said main housing and in concentric relation to a longitudinal axis extending centrally through said housing, said system comprising a single photosensitive detecting element of relatively small predetermined size disposed at a fixed axial location in said main housing for detecting any appreciable change in light intensity occurring in any part of said object field, a plurality of similar light apertures circumferentially arranged in side wall portions of said housing, said light apertures being appreciably spaced from one another in said wall portions and with said wall portions between each pair of adjacent light apertures being of substantially equal size, each of said light apertures being of relatively small dimensions considered in both the axial and circumferential directions of said housing, and each being arranged in like angular relation to said longitudinal axis at said fixed axial location, whereby each of said light apertures will be disposed so as to face outwardy toward a different predetermined sector of said endless angular object field, each light aperture being formed so as to view a sector of appreciable circumferential angular value, and to admit into said housing light from all parts of the sector aligned therewith, and all of said light apertures being so disposed relative to each other in said housing as to jointly simultaneously admit into said housing light from all parts of said endless annular object field, a plurality of optical systems within said housing, each of said optical systems being optically aligned with a different one of said light apertures, respectively, and with said photosensitive detecting element, and each of said optical systems comprising means providing a plurality of spaced optical surfaces including means having an optical surface for collecting substantially all of the light from said object field which enters the light aperture aligned therewith and for directing substantially all of the light so collected toward means providing a second optical surface, said second optical surface being a positive optical surface disposed so as to receive substantially all of said light and direct same as a convergent beam onto said photosensitive detecting element.

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