Optical distance measuring instrument

专利名称：Optical distance measuring instrument发明人：Alfons Ernst申请号：US05/971249申请日：19781220公开号：US04243325A公开日：19810106

摘要：An instrument for measuring a dimension of an object is disclosed including arotatable disc defining at least one translucent involute slit proceeding from a base circlecentered at the center of rotation of the disc and a diaphragm mounted adjacent the discand defining a linear slit arranged on a line tangent to the base circle. The intersection ofthe involute slit and the diaphragm slit forms a translucent overlap zone, and an image ofthe object is projected onto the disc or the diaphragm in the region of the diaphragm slitoriented such that the dimension to be measured is parallel to the diaphragm slit.

申请人：DR. JOHANNES HEIDENHAIN GMBH

代理机构：Hume, Clement, Brinks, Willian & Olds, Ltd.

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