| 摘要 |
PURPOSE:To manufacture continuously the titled optical transmitting body by a stable wire diameter, by measuring a diameter of an organic base material extruded continuously from a forming means, and adjusting a feed quantity of a pre-polymer based on a measured value. CONSTITUTION:A cylinder 19 to which transparent glass windows 14, 15 for measuring a wire diameter of an organic base material have been installed is inserted between a diffusion layer 18 and a forming tool 12. A laser light emitting part 7 and a laser photodetecting part 6 are installed on both sides of this cylinder 19 with a window, so that a laser light 8 scans in the direction crossing the organic base material 21 through the window 14 by a tuning fork. The light 8 which has transmitted through the base material 21 is detected by the photodetecting part 6, and based on the time when the photodetecting quantity has been reduced during the scan, namely, the time of scan which has transmitted through the base material 21, its diameter is calculated. It is fed back to a driving voltage of an extruding motor 4, and an extruding speed of a piston 2 is controlled in order to align the wire diameter of the organic base material with a set value. |
