激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2012年
4期
20-21
,共2页
波片%相位延迟%空心轴步进电动机%单片机
波片%相位延遲%空心軸步進電動機%單片機
파편%상위연지%공심축보진전동궤%단편궤
wave plate%phase retardation%hollow axle stepping motor%single chip computer
本文提出用空心轴步进电动机带动待测波片调制输出光强，单片机控制步进电动机并同步采样输出光强的光电信号，通过USB接口将采样的光电信号数字量传给上位机，上位机根据步机电动机的时钟脉冲和采样光电信号，求出波片相位延迟的方法。同时提出利用已知四分之波片快轴标定待测波片快轴的新方法。对该方法的不确定度进行了分析。设计制作了实验装置，测量结果表明，四分之波片相位延迟测量的不确定度小于2°。
本文提齣用空心軸步進電動機帶動待測波片調製輸齣光彊，單片機控製步進電動機併同步採樣輸齣光彊的光電信號，通過USB接口將採樣的光電信號數字量傳給上位機，上位機根據步機電動機的時鐘脈遲和採樣光電信號，求齣波片相位延遲的方法。同時提齣利用已知四分之波片快軸標定待測波片快軸的新方法。對該方法的不確定度進行瞭分析。設計製作瞭實驗裝置，測量結果錶明，四分之波片相位延遲測量的不確定度小于2°。
본문제출용공심축보진전동궤대동대측파편조제수출광강，단편궤공제보진전동궤병동보채양수출광강적광전신호，통과USB접구장채양적광전신호수자량전급상위궤，상위궤근거보궤전동궤적시종맥충화채양광전신호，구출파편상위연지적방법。동시제출이용이지사분지파편쾌축표정대측파편쾌축적신방법。대해방법적불학정도진행료분석。설계제작료실험장치，측량결과표명，사분지파편상위연지측량적불학정도소우2°。
A novel means is propesed to measure phase retardation of wave plates.A hollow axle stepping motor rotates the wave plate and modulates output light intensity, while the single chip computer controls the stepping motor and synchronously samples optical and electric signals of output intensity. Once the sampled signal, s are transmitted to the superior computer by USB interlace,according to the stepping motor time pulse and the sampled signals, the phase retardation of the wave plate can be obtained by the superior computer. Moreover,a new approach to calibrate the fast axis of the quarter wave plate is proposed,in which the uncertainty is analyzed.The experimontal result shows that the phase retardation of the quarter wave plate is less than 2 degree.
