Variable reference blocking apparatus and method of use

    公开(公告)号:US10569379B2

    公开(公告)日:2020-02-25

    申请号:US15109091

    申请日:2014-12-30

    Abstract: Described is a variable reference blocking apparatus for blocking an optical article (5). The apparatus comprises an adjustable ring unit (11) having a plurality of concentric members (19,19c,19i) positioned about a central axis. Each concentric member (19,19c,19i) generally comprises a lip region (17) on its upper end that is capable of receiving at least a portion of a front face of the optical article (5). The apparatus further comprises a moveable base (13) in which its upper portion is coupled with a removable insert (7). The removable insert (7) is generally positioned to be centered about the front face of the optical article (5).

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