Kabushiki Kaisha Daini Seikosha

Seiko Instruments & Electronics Ltd.

Mamoru Hayamizu

Yasushi Tanigaki

Nobuo Tsukada

An automated drawing system has an automatic drawing machine which receives input data from a central control unit for making a drawing on a roll of drawing paper in accordance with the input data. At the time of making the drawing, the automatic drawing machine also encodes the drawing paper with a bar code pattern representative of the lengthwise and widthwise size of the drawing. The drawing paper is then advanced to a paper cutter system which includes a bar code reader for reading and decoding the bar code pattern and for producing therefrom control signals indicative of the desired lengthwise and widthwise size of the drawing. These control signals are fed to a Y-axis or widthwise cutter and an X-axis or lengthwise cutter which accordingly cut the drawing paper in lengthwise and widthwise directions to obtain a cut piece of drawing paper containing thereon the drawing and having a size determined by the bar code pattern.

Paper cutting unit of automatic drawing machines

A beam of light from a light source is reflected by a polyhedral mirror which is continuously rotating in a constant speed around its axis. The reflected beam sweeps on an object and passes a predetermined point of the object surface. A dispersed light from the point is formed into a beam through a set of slits and reaches a light detector. The polyhedral mirror has a plurality of mirror surfaces each of which is spaced at a distance from the rotary axis thereof, different from the adjacent mirrors. A pair of targets are arranged in the beam axis to the light detector. Dispersed light beams from both upper and lower targets also reach into the light detector. The distance between a point of the object and the beam line from the light source is computed from the distances of the mirror surfaces from the rotary axis of the polyhedral mirror, the distance between the upper and lower targets and the inclination angles of the mirror surfaces from the beam line, and the angles of the reflected beam hitting the predetermined point or the targets.

Method for optically measuring a distance

A beam of light from a light source is reflected by a polyhedron mirror which is continuously rotating around its axis. The reflected beam sweeps on an object and passes a predetermined point of the object surface. A dispersed light from the point is formed into a beam through a set of slits and reaches into a light detector. The polyhedron mirror has a plurality of mirror surfaces each of which is spaced at an independent distance from the rotary axis thereof. The distance between the predetermined point of the object and the beam line from the light source is computed by using the distances of the mirror surfaces from the rotary axis of the polyhedron mirror and the inclination angles of the mirror surfaces from the beam line, at which angles the reflected beam hits the predetermined point.

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Tokyo, Japan

Mamoru Hayamizu