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专利名称：Optical measuring system发明人：Charles King申请号：US06/235400申请日：19810218公开号：US04461576A公开日：19840724
摘要：An optical gauge having a laser or other such light source, the beam from whichis cyclically directed upon a photo-detector by a rotating plane mirror, the time at whichor during which in each revolution of the plane mirror the beam impinges upon thephoto-detector being commensurate with a linear parameter of a workpiece upon whichthe beam is also directed, either constantly, as in the first disclosed embodiment, orcyclically as the beam is moved across the workpiece and occluded thereby during aportion of each rotation of the mirror, as in the second disclosed embodiment. The pointon the rotating mirror at which the beam is reflected lies at the focal point of a fixed,parabolic mirror. In the first embodiment, used to monitor the surface level of a processliquid, such as molten glass, the beam is directed at an angle upon the surface of theliquid by which it is reflected to a single parabolic mirror and thence to the rotating planemirror by which it is scanned in a circular path which intersects the photo-detector in eachrevolution. In the second embodiment, the workpiece is positioned between a pair ofparabolic mirrors arranged in coaxial, face-to-face relation. The beam is scanneddiametrically across a first parabolic mirror after being reflected by the rotating planemirror, and is thus reflected to and scanned across the second parabolic mirror exceptwhen it is occluded by the workpiece between the two parabolic mirrors. The photo-
detector lies at the focal point of the second parabolic mirror and thus receives light atall times that the beam is scanned across the parabolic mirrors except when occluded bythe workpiece. Thus, the time during which the beam is occluded during each scan is afunction of the position or dimension of the workpiece by which it is occluded.
申请人：COURSER INCORPORATED
代理机构：Jones, Tullar & Cooper
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