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公开(公告)号：US20170276595A1
公开(公告)日：2017-09-28
申请号：US15330131
申请日：2015-02-11
CPC分类号： G01N21/15 , B08B5/00 , B08B17/02 , G01N2021/151
摘要： An inspection lens, including a lens tube having a central longitudinal axis and a plurality of axially aligned optical elements, including an outermost element. A sheath surrounding the lens tube and defining there between an annular air flow channel. The sheath has a diversion nozzle at a distal end, terminating in a lens tip. The diversion nozzle is configured to divert the air flow in the annular channel inward toward the longitudinal axis and at a slight reverse angle of between 0-18 degrees relative to a plane normal to the axis and back toward the outermost element creating a reverse oblique impinging jet inside said lens tip that minimizes any recirculation zone in front of the outermost element.
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