公开(公告)号：KR100675607B1

公开(公告)日：2007-02-01

申请号：KR1020050102675

申请日：2005-10-29

Applicant: 조선대학교산학협력단

Inventor： 김재열 ,  곽이구 ,  송경석 ,  양동조 ,  김우진

IPC: G01D5/353

Abstract: A laser encoder using an optic fiber as a laser transfer medium is provided to realize miniaturization through simplification of a laser interferometer by using a flexible optical fiber as a transmission medium of laser and of dividing the optical fiber. A laser encoder using an optic fiber as a laser transfer medium includes a laser source(1), a beam transmission unit(2) including a beam splitter(21) to separate a single wavelength laser beam from a laser beam emitted from the laser source, an optical fiber(22) to receive and transmit the single wavelength laser beam, a beam reducer(23) to guide the laser beam at an end of the optical fiber to the center of the optical fiber, and a beam expander(24) to output the laser beam in the form of a parallel laser beam with a predetermined diameter, a detector head(3) including a polarizing beam splitter(31) to separate the laser beam into a reference laser beam(RB) and a measuring laser beam(MB), a movable reflector(33) installed to a mobile body, a 1/4 wave plate(34) to change the polarizing direction of the measuring laser beam, a fixed reflector(36) to combine the reference laser beam with the reflected measuring laser beam, a quad-photodiode to detect an inference signal, an amplifier(38), a traveling distance estimator(4) having an A/D converter(41), and a phase estimator.

Abstract translation: 提供一种使用光纤作为激光传输介质的激光编码器，通过使用柔性光纤作为激光的传输介质和分割光纤，通过简化激光干涉仪实现小型化。 一种使用光纤作为激光传输介质的激光编码器，包括激光源（1），包括分束器（21）的光束传输单元（2），所述分束器用于从激光源发射的激光束中分离单波长激光束 ，接收和发射单波长激光束的光纤（22），将光纤端部的激光束引导到光纤中心的光束减径器（23），以及扩束器（24） 以具有预定直径的平行激光束的形式输出激光束，包括偏振分束器（31）的检测器头（3），以将激光束分离成参考激光束（RB）和测量激光束 （MB），安装在移动体上的可动反射镜（33），改变测定用激光的偏振方向的1/4波长板（34），将参照激光与上述 反射测量激光束，检测推理信号的四极光电二极管，放大器（38） ，具有A / D转换器（41）的行进距离估计器（4）以及相位估计器。