کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7131737 1461689 2018 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Accuracy concerns in digital speckle photography combined with Fresnel digital holographic interferometry
ترجمه فارسی عنوان
دقت در عکاسی دیجیتال همراه با تلسکوپ هولوگرافی دیجیتال فرسن
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
چکیده انگلیسی
A combination of digital holographic interferometry (DHI) and digital speckle photography (DSP) allows in-plane and out-of-plane displacement measurement between two states of an object. The former can be determined by correlating the two speckle patterns whereas the latter is given by the phase difference obtained from DHI. We show that the amplitude of numerically reconstructed object wavefront obtained from Fresnel in-line digital holography (DH), in combination with phase shifting techniques, can be used as speckle patterns in DSP. The accuracy of in-plane measurement is improved after correcting the phase errors induced by reference wave during reconstruction process. Furthermore, unlike conventional imaging system, Fresnel DH offers the possibility to resize the pixel size of speckle patterns situated on the reconstruction plane under the same optical configuration simply by zero-padding the hologram. The flexibility of speckle size adjustment in Fresnel DH ensures the accuracy of estimation result using DSP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 104, May 2018, Pages 84-89
نویسندگان
, , , ,