| 摘要 |
PURPOSE:To measure a shape at a high accuracy by arranging an irradiation means for a pattern projection light to be projected to an object within a tube cylinder operable freely at a manipulation end to always maintain a fixed angle of irradiation of a laser light pattern. CONSTITUTION:A torque cable 15 is a tubular cable and when a rotating force is applied from one end thereof to turn it by a specified angle, the other end thereof turns by the same angle. When a pattern projection member 18 is turned by a specified angle from the manipulation side of an endoscope 17, the tip thereof turns by the same angle by the action of the torque cable 15. As a result, an outgoing angle theta1 of a laser light pattern emitted from the pattern projection member 18 can be fixed at a fixed value. The pattern projection member 18 is inserted and the insertion thereof is stopped at a position where the tip of the member enters an assigned area of a monitor screen. Thus, an outgoing position of the laser light pattern can be fixed thereby enabling highly accurate measurement of a shape with a higher reliability in the results of computation.
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