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公开(公告)号：US3572883A
公开(公告)日：1971-03-30
申请号：US3572883D
申请日：1969-08-27
Applicant: SAAB AB
Inventor： NORDLUND STEN , WETTERBRANDT BENGT , PERSSON LARS-JOHAN
CPC classification number: G06K9/2009 , G01T5/02
Abstract: A scanner for bubble chamber photographs comprises a rotatable mirror-carrying outer member and an inner periscope member that rotates with and moves lengthwise relative to the outer member. The periscope member has accurately straight track surfaces along its length that parallel the rotational axis and lie in substantially perpendicular planes which respectively extend to opposite sides of said axis. Each of said tracks is engaged by rollers carried by the outer member at fixed axially spaced locations. Other rollers on the outer member engage the periscope member under radially inward bias to maintain the track surfaces guidingly engaged with the first mentioned rollers.
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