Quality of finish measurement optical instrument

专利名称：Quality of finish measurement optical

instrument

发明人：John Pfanstiehl申请号：US09/038579申请日：19980311公开号：US06088116A公开日：20000711

摘要：A small battery powered instrument and method for measuring the finishappearance quality of highly reflective surfaces such as the paint on the exterior bodypanels of automotive vehicles. The instrument is placed on the surface to be measured;ambient light is prevented from entering from the interior space of the instrument by itsopaque enclosure and by a seal which contacts the reflective surface. The user looksthrough a binocular viewing port at a reflection of a test object on the surface. The testobject is illuminated by an internal bulb and internal power source which enables theinstrument to be used in the field or with any ambient light levels. In the preferredembodiment, the test object is comprised of lines of alphanumeric characters; each linehas successively smaller characters and the reflection is viewed at a fixed 20 degree angleto perpendicular to the surface. The measured value of the surface's finish appearancequality is the number of the line that has the smallest characters which are all clearlyrecognizable to the user. The instrument is comprised of a minimum number of opticalcomponents to make this measurement affordable to new markets. The alphanumericcharacters provide a greater degree of precision in discerning small differences in finishappearance quality than test objects in the prior art.

申请人：PFANSTIEHL; JOHN

代理机构：Gifford, Krass, Groh, Sprinkle, Anderson & Citkowski, PC

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