激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2014年
3期
33-34
,共2页
三维测量%傅里叶变换%条纹周期性%光栅函数%测量精度
三維測量%傅裏葉變換%條紋週期性%光柵函數%測量精度
삼유측량%부리협변환%조문주기성%광책함수%측량정도
Three-dimensional Measurement%Fourier Transform%Periodic Stripes%Grating Function%Measurement Accuracy
采用逆推法，计算出基于发散光路的三维测量中参考面上为标准的正弦性光场时的投影光栅函数，再将计算出的投影光栅，用投影仪投影到参考面上，从而获得了标准的正弦性光场，并利用傅里叶变换方法进行三维测量。实验研究表明，此方法可以有效地抑制变形条纹的频谱混叠，准确的提取其基频信息，从而提高三维测量的精度。仿真与实验均验证了提出方法的可行性与有效性。
採用逆推法，計算齣基于髮散光路的三維測量中參攷麵上為標準的正絃性光場時的投影光柵函數，再將計算齣的投影光柵，用投影儀投影到參攷麵上，從而穫得瞭標準的正絃性光場，併利用傅裏葉變換方法進行三維測量。實驗研究錶明，此方法可以有效地抑製變形條紋的頻譜混疊，準確的提取其基頻信息，從而提高三維測量的精度。倣真與實驗均驗證瞭提齣方法的可行性與有效性。
채용역추법，계산출기우발산광로적삼유측량중삼고면상위표준적정현성광장시적투영광책함수，재장계산출적투영광책，용투영의투영도삼고면상，종이획득료표준적정현성광장，병이용부리협변환방법진행삼유측량。실험연구표명，차방법가이유효지억제변형조문적빈보혼첩，준학적제취기기빈신식，종이제고삼유측량적정도。방진여실험균험증료제출방법적가행성여유효성。
A method to construct grating projection function by inverse method is given in this paper. When a sinusoidal grating is projected on a diffuse object to be measured, the grating’s phase deformation caused by the surface shape is extracted by the Fou-rier transform method. Experiment shows that the proposed method can effectively inhibit spectrum aliasing of deformation stripes, and accurately extract the fundamental frequency information, so as to improve the accuracy of three-dimensional measurement. Simu-lation and experimental results show the feasibility and effectiveness of this method.
