کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
735140 893572 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Wavefront reconstruction method using the intensity image of phase-shift grating
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Wavefront reconstruction method using the intensity image of phase-shift grating
چکیده انگلیسی

An improved Hartmann test for wavefront reconstruction and spot diagram building with high spatial resolution is presented, which uses geometrical optics and ray tracing method based on the phase information of phase-shift grating. To improve accuracy and spatial resolution the fringe analysis is used. A liquid–crystal display (LCD) is used as a grating and a phase-shifting device. The sinusoidal grating generated by the computer was displayed on the LCD and illuminated to generate the fringe beam. The fringe beam transmits the lens being tested and the image of the phase-shift grating is projected on a screen. A CCD camera detects the intensity distribution of the images and the fringes become deformed carrying the information of wavefront. The deformed phase distribution can be tested accurately by the phase-shifting technique and then is used for ray tracing. The spot diagram is obtained from the phase distribution contour lines. And the wavefront can be reconstructed because that the light travels in direction normal to the wavefront. In this paper, the method is presented, and the experimental results are shown.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 48, Issue 5, May 2010, Pages 600–604
نویسندگان
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