High Precision Signal Processing Algorithm for White Light Interferometry
نویسنده
چکیده
A new signal processing algorithm for absolute temperature measurement using white light interferometry has been proposed and investigated theoretically. The proposed algorithm determines the phase delay of an interferometer with very high precision (.
منابع مشابه
White Light Spectral Interferometry for Real-time Surface Profile Measurement
This paper presents a high speed surface profile optical measurement technique based on white light spectral interferometry and parallel signal processing using a general purpose graphic processing unit (GPGPU). A white light source is used to acquire the surface profile of the sample instantly in real time through a cylindrical Michelson interferometer. The interference signals are resolved by...
متن کاملBayesian Estimation for White Light Interferometry
In this thesis, a new approach for the reconstruction of height maps from scanning white light interferometry is presented. This method unifies the conventional steps of preand postprocessing within Bayesian inference. An adept formulation of the prior allows for the exact computation of the height estimate, obviating the need for stochastic sampling or simulation methods. In conventional surfa...
متن کاملFundamental aspects of resolution and precision in vertical scanning white-light interferometry
Wediscuss the height and lateral resolution that can be achieved in vertical scanningwhite-light interferometry (SWLI).With respect to interferometric height resolution, phase-shifting interferometry (PSI) is assumed to provide the highest accuracy. However, if the noise dependence of SWLI phase evaluation and PSI algorithms is considered, SWLImeasurements can be shown to bemore precise.With re...
متن کاملIn-Situ Surface Inspection Using White Light Channelled Spectrum Interferometer
We introduce a new environmentally robust optical interferometry system for fast surface profile measurement. The proposed white light channelled spectrum Interferometer (WLCSI) is effective for applications in on-line surface inspection because it can obtain a surface profile in a single shot. Compared to the traditional spectral interferometry techniques, cylindrical lens is used in the Miche...
متن کاملGrid Impedance Estimation Using Several Short-Term Low Power Signal Injections
In this paper, a signal processing method is proposed to estimate the low and high-frequency impedances of power systems using several short-term low power signal injections for a frequency range of 0-150 kHz. This frequency range is very important, and thusso it is considered in the analysis of power quality issues of smart grids. The impedance estimation is used in many power system applicati...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 8 شماره
صفحات -
تاریخ انتشار 2008