CAJ | 학술논문

传统的时间平均全息术通过对再现像光强分布的测量来实现振幅分布的检测,由于噪音影响往往得不到满意的结果.第一类零阶贝塞尔函数相位只有0和π两个取值,所以利用再现光场的相位可以确定振幅分布.理论分析发现,以往的讨论忽略了照明光之间位移引起的相位变化,研究通过叠加一个相位因子对此进行了修正,并利用贝塞尔函数平方的相位特点提出了消除该相位因子的办法.实验结果表明,该相位因子确实存在并影响测量,用本文所提出的方法可以很好地消除该相位因子的影响,使利用时间平均数字全息再现光场的相位检测振动物体的振幅分布变得方便和准确.
전통적시간평균전식술통과대재현상광강분포적측량래실현진폭분포적검측,유우조음영향왕왕득불도만의적결과.제일류령계패새이함수상위지유0화π량개취치,소이이용재현광장적상위가이학정진폭분포.이론분석발현,이왕적토론홀략료조명광지간위이인기적상위변화,연구통과첩가일개상위인자대차진행료수정,병이용패새이함수평방적상위특점제출료소제해상위인자적판법.실험결과표명,해상위인자학실존재병영향측량,용본문소제출적방법가이흔호지소제해상위인자적영향,사이용시간평균수자전식재현광장적상위검측진동물체적진폭분포변득방편화준학.
In traditional digital holography,the measurement of amplitude of vibration is realized by detecting the intensity distribution of reconstructed image,and satisfied results can not be obtained.The phase of the first kind zero-order Bessel function has binary values,zero and π,thus,the distribution of amplitude of vibration can be measured through the phase of reconstructed wave.Theoretical analysis demonstrates that the phase change caused by the shift of illuminated light is ignored in discussion before.In this study,this method is corrected by overlapping a phase factor and a new method is put forward to eliminate the effects of this factor by utilizing the phase characteristics of squared Bessel function.Experiment shows that,this phase factor not only exist,but also influence final measurement.Using proposed method,this influence can be eliminated very well.Moreover,it will bring convenience into the measurement of amplitude of vibration via the phase of reconstructed wave in time-average digital holography.