Novel Measurement Method of Small Phase with Interference Phase Contrast

Li Ping Pan; Chong Guang Li

doi:10.4028/www.scientific.net/AMR.301-303.1020

Paper Titles

Research of a Measuring System for UV Absolute Spectral Response Based on ECPR
p.1001

FPN Analysis and Processing of the Science Grade CCD Alta U9000
p.1007

Design and Development of Crude Oil Security System Based on Photoelectric Beam Detector
p.1011

Application of Data Protection in Motor Test and Control System
p.1016

Novel Measurement Method of Small Phase with Interference Phase Contrast
p.1020

The Design of Automatic Detection and Classification System for Recycled Drill Pipe
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Analysis and Evaluation of InSAR Phase Unwrapping Approaches
p.1029

Precision Analysis of Gravity Vertical Gradient Measurement Based on CG - 5 Relative Gravimeter
p.1036

Study on Sub-Pixel Techniques for Accurate Image Measurement of Displacement
p.1042

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 301-303Novel Measurement Method of Small Phase with...

Novel Measurement Method of Small Phase with Interference Phase Contrast

Abstract:

A novel method to measure small phase in micro-holography is discussed. It originated from Zernike phase contrast imaging technique, which has been a successful linear phase-to-intensity mapping approach toward phase object. Instead of phase-changing plate, an interference phase contrast technique that is based on in-line holography is utilized to obtain a hologram in the proposed method. The intensity distribution of hologram presents a monotone function with respect to phase distribution of phase object. Thus, the phase can be directly detected through hologram without phase unwrapping. In the work, the contrast of hologram is analyzed toward various phase difference between object wave and reference wave. An optimal solution to measure small phase of phase object is developed, which extends the measuring range of phase. Simulation on a computer is performed to validate theoretically the proposed method.