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Title: Electronic Chart Scanning And Related Equipment
Author: Emile Farr
Source: 1977 International School of Hydrocarbon Measurement
Year Published: 1977
Abstract: The Electroscanner, as pictured in Figure 1, consists of two scan stations with an associated digital computer housed in one of the station cabinets. A different scan station is required for the integration of each type chart, i.e., American, Foxboro, or Rockwell. The instrument shown here will scan American or Foxboro charts. Temperature and gravity charts may also be scanned. The unit to be used at a given time may be selected by the operator. A front panel switch is provided for the selection. The optical scanner consists of a large rotating disk which contains several scan lenses, the number depending upon the geometry of the particular type chart to be read. This disk rotates above a revolving chart table, both being driven by a common synchronous motor. A small fluorescent light is used as a chart illuminator. Reflected light from the chart is collected by a scan lens and focused via a prism and mirrors onto the face of a light sensitive phototube.

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