Importance

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Abstract

Scanning apparatus is provided for sensing non-coded images on a substrate. Hand-held scanning apparatus comprises a group of light sensitive elements for sensing the light and dark pattern of the image as the scanner is moved across the substrate and means for sensing the velocity of the scanner. The velocity determination is carried out through sensing means which comprise an X-Y coordinate grid positioned between the scanner and the substrate, means for sensing the rectilinear component of movement of two positions on said scanner with respect to the X lines in said grid together with the means for sensing the rectilinear component with at least one position on said scanner with respect to the Y lines on said grid. With this capability of calculating the rectilinear components of three such points or positions, the velocity of a given movement of the scanner in the X-Y and .theta. (rotational) directions may be determined. In this manner, the scanner is able to sense lines of the image relative to the velocity of movement of the hand-held scanner which is all that is necessary to record and reproduce the image.

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First Claim