公开(公告)号：KR1020030061200A

公开(公告)日：2003-07-18

申请号：KR1020020001744

申请日：2002-01-11

Applicant: 국방과학연구소

Inventor： 백성현 ,  최경영 ,  황을하

IPC: G01B9/02

Abstract: PURPOSE: A photo detector and a photo detecting method are provided to achieve a simple and compact structure of the photo detector by aligning optical fibers in a row. CONSTITUTION: A photo detector includes a light source(25) for radiating laser beam(26), a first optical fiber(21) for transmitting laser beam(26) radiated from the light source(25), a lens(23) for allowing laser beam(26) to be focused onto an upper surface of a sample(24), and a second optical fiber(22) for transmitting reflection beam(26a), which is reflected from the upper surface of the sample(24) spaced from a center of the lens(23) by a predetermined distance corresponding to twice of a focusing distance of the lens(23), into a signal processing section(27). Ends of the first and second optical fibers(21,22) and the upper surface of the sample(24) are located at positions, which are spaced from the center of the lens(23) by the predetermined distance corresponding to twice of the focusing distance of the lens(23), so that an image of the end of the first optical fiber(21) is formed in an opposite side of the lens(23), which is spaced from the lens(23) at the same distance with the end of the first optical fiber(21).

Abstract translation: 目的：提供光电检测器和光电检测方法，以通过将光纤排列成一行来实现光电检测器的简单紧凑的结构。 构成：光检测器包括用于辐射激光束（26）的光源（25），用于传输从光源（25）辐射的激光束（26）的第一光纤（21），用于允许 将聚焦在样品（24）的上表面上的激光束（26）和用于透射从样品（24）的上表面反射的反射光束（26a）的第二光纤（22） 透镜（23）的中心距离相当于透镜（23）的聚焦距离的两倍的预定距离处于信号处理部分（27）中。 第一和第二光纤（21,22）的端部和样品（24）的上表面位于与透镜（23）的中心相隔预定距离的位置处，该距离对应于聚焦的两倍 透镜（23）的距离，使得第一光纤（21）的端部的图像形成在与透镜（23）相距一定距离的透镜（23）的相对侧， 第一光纤（21）的端部。