CAJ | 학술논문

基于投影栅的3维面形测量中，包裹相位的提取过程中不可避免地会引入载频分量。为了准确地还原受物体3维形貌所调制的真实相位，必须要消除载频相位，采用剪切原理消除投影栅中的载频，首先通过对光场作剪切转化为相位梯度分布的新光场，再联合最小二乘解包裹算法进行相位展开，并与现有的方法进行了对比。结果表明，该方法能够有效地消除载频，减小重建误差，且其算法简单，可使重构相位值更接近待测的真实相位值。该方法在投影栅去载频的研究中是可行和有效的。
기우투영책적3유면형측량중，포과상위적제취과정중불가피면지회인입재빈분량。위료준학지환원수물체3유형모소조제적진실상위，필수요소제재빈상위，채용전절원리소제투영책중적재빈，수선통과대광장작전절전화위상위제도분포적신광장，재연합최소이승해포과산법진행상위전개，병여현유적방법진행료대비。결과표명，해방법능구유효지소제재빈，감소중건오차，차기산법간단，가사중구상위치경접근대측적진실상위치。해방법재투영책거재빈적연구중시가행화유효적。
In 3-D shape measurement based on projection grating , the carrier frequency component will be introduced inevitably in wrapped phase extraction process .In order to accurately reduce the true phase modulated by 3-D shape of objects, the carrier frequency must be eliminated .The shearing principle was used to eliminate the carrier frequency in the projection gating.Firstly, the new optical field of phase gradient distribution was formed by shearing optical field , and then the phase was unwrapped with the least square algorithm .After comparing the existing methods , it was found the method used in this paper is valid .Simulation and experiments proved that this method can effectively eliminate the carrier frequency , reduce the reconstruction error ,not only the algorithm is simple , but also the reconstructed phase is more close to the true measured phase .This method is feasible and effective on study about removal of carrier frequency in grating projection.