1
Peter Bohlander, Heinz Peter Hippler: Apparatus for the determination of the position of a surface. Betriebsforschungsinstitut VDEh Institut fur angewandte Forschung, Holman & Stern, June 5, 1984: US04453083 (16 worldwide citation)

Apparatus is disclosed for determining the position of a surface in which radiation from an optical radiant source is applied to the surface and, by means of a lens system, an image of the radiation is produced on a photoelectric receiver. A laser serves as the radiant source, and is aimed at an ang ...


2
Peter Bohlander: Method and means for the determination of a planar dimension. Institut fur Angewandte Forschung, Holman & Stern, January 10, 1978: US04067652 (9 worldwide citation)

In measuring the width of rolled stock, a photo-sensitive diode array overlying an edge of the stock is scanned to provide an indication of the position of the edge of the stock, the outputs of the diodes appearing serially to provide a waveform. To find the step in this waveform which represents th ...


3
Peter Bohlander: Apparatus for adjusting the position of an edge with surface portions reflecting different wavelengths of light. Betriebsforschungsinstitut VDEh Institut fur angewandte Forschung, Holman & Stern, May 6, 1986: US04587414 (5 worldwide citation)

Apparatus for adjusting the position of an edge between two surface porti of a moving belt with different spectral reflectivities where required in connection with work or treatment needed along the edge of one of the two surface portions while the belt is moving. It is a pre-requisite condition tha ...