Abstract:
In an absolute position measuring method prepared by the present invention, a data cell expressing one bit of an absolute position binary cord (APBC) includes a data section, a neutral section, and a clock section at a relatively fixed position. The method comprises as follows: a step where each section includes one or more segments, the data cell is subdivided by segments at regular intervals, and a binary scale composed of the APBC is provided; a step of acquiring the image of the binary scale; and a step of calculating an absolute position by processing the image. In the magnification of an optical system, the width of an image corresponding to one segment is integer times of a pixel width of a photo sensor array. [Reference numerals] (S102) Obtain binary scale intensity profile or image;(S112) Trace clock pixel;(S114) Set clock pixel index;(S122) Obtain absolute code pixel index;(S124) Determine binary sate of pixel sub-set by using the intensity of absolute code pixels corresponding to absolute code pixel index;(S126) Convert binary code of pixel sub-sets in which binary state is determined into absolute location through rockup table;(S130) Fine data pixel corresponding to the location of data section with maximum intensity in each pixel sub-set;(S142) Calculate relative phase of the data section by using pixel vales around the data pixels;(S144) Take -2� when the relative phase is over zero;(S150) Calculate absolute position by using absolute position code, absolute code pixel index and relative phase
Abstract:
본 발명은 가시도 향상 저결맞음 간섭계에 관한 것으로, 더 상세하게는 백색광(다파장)을 이용하여 유체 내에 있거나 반투명 바이오샘플 등 저반사율물질의 결맞음에 의한 단차 측정시 반사광의 광량을 주입잠금기법에 의해 위상 왜곡없이 증폭하여 기준면과 측정면에서 각각 반사된 기준광신호와 반사광신호를 동일 또는 유사하게 하여 가시도를 향상시킨 가시도 향상 저결맞음 간섭계에 관한 것이다.
Abstract:
PURPOSE: An underwater moving body precise exploration device, an exploration method and an aerial vehicle with the exploration device are provided to measure and analyze a flow field of water stream generated by an underwater moving body on a 2D or 3D space. CONSTITUTION: A scanner(2) irradiates a laser beam of a laser light source to a specific object area in underwater. An imaging optical system(3) transmits the laser beam to an optical detection unit(4). The laser beam is reflected after irradiating the laser beam from the laser light source to the specific object area. The optical detection unit(4) is installed in a location for sensing the reflected laser beam. The optical detection unit senses and processes the reflected laser beam by an optical method. A flow field analysis unit(5) analyzes flow field data of water stream generated by an underwater moving body on a 2D or 3D space by using the reflected laser beam and optical information of an irradiated laser beam. [Reference numerals] (AA) Object area; (BB) Flow field generated by water stream
Abstract:
PURPOSE: An optical encoder and a displacement measuring method using the same are provided to measure the absolute displacement of high resolution and to reduce size and costs with one track. CONSTITUTION: An optical encoder comprises a light emitting unit(30), a reflecting member(20), a moving member(10), and a first light receiving unit(41). The reflecting member reflects lights of the light emitting unit. The moving member is arranged to a direction across a progressive direction of the lights between the light emitting and the reflecting member and comprises a diffraction screen. The diffraction screen is arranged at a constant pitch along a moving direction. [Reference numerals] (71) First signal processing unit; (72) Second signal processing unit
Abstract:
The present invention provides a spectrum domain interface device and a spectrum domain interface device. The spectrum domain interface device comprises: a laser light source oscillating in a constant frequency band at constant longitudinal mode frequency intervals; a fiber-ferrule resonator for making light received from the laser light source penetrate selected longitudinal modes having a free spectral range greater than the longitudinal mode frequency intervals; an interferometer for making interference light having a light path difference caused by different light paths from the light received from the fiber-ferrule resonator; a spectrum analyzer for resolving and analyzing the interference light received from the interferometer according to frequencies; and a signal processing part for extracting the spectrum cycle of an interference signal according to the frequencies using the interference signal of the spectrum analyzer, and the light path difference received from the interferometer using the spectrum cycle.