Highly accurate wavefront reconstruction algorithms over broad spatial-frequency bandwidth
نویسندگان
چکیده
منابع مشابه
Highly accurate wavefront reconstruction algorithms over broad spatial-frequency bandwidth.
New algorithms for reconstructing wavefront from slopes data are developed, which exhibit high accuracy over broad spatial-frequency bandwidth. Analyzing wavefront reconstructors in the frequency domain lends new insight into ways to improve frequency response and to understand noise propagation. The mathematical tools required to analyze the frequency domain are first developed for discrete ba...
متن کاملAlgorithms for Wavefront Reconstruction
Knowing the solution to Helmholtz equation in a narrow band, with a width of order wave length around a scatterer, we investigate the possibility to construct the wave fronts predicted by the asymptotic methods Geometrical Optics (GO) and Geometrical Theory of Diffraction (GTD). More specifically we show how to build a polynomial approximation of the asymptotic solution on a circle around the s...
متن کاملBroad-Bandwidth Optical Frequency Conversion of Over 100 Terahertz in Silicon Waveguides
We demonstrate ultra-broad-bandwidth low-peak-power frequency conversion of continuouswave light in a silicon photonic structure via the nonlinear optical process of four-wave mixing. Our process produces continuous conversion over two-thirds of an octave from 1241-nm to 2078-nm wavelength light. This provides us with an extremely broad-bandwidth of over 100 THz, which is useful for application...
متن کاملSpatial-frequency bandwidth of perceived contrast
The aim of this study was to investigate the spatial-frequency bandwidth of perceived suprathreshold contrast. It has been shown that for grating stimuli contrast detection thresholds depend on spatial frequency, grating area and the number of orientation components. However, suprathreshold contrast perception exhibits contrast constancy, i.e. suprathreshold contrast matches are independent of ...
متن کاملVibrationally resolved sum-frequency generation with broad-bandwidth infrared pulses.
We present a novel procedure for vibrationally resolved sum-frequency generation (SFG) in which a broad-bandwidth IR pulse is mixed with a narrow-bandwidth visible pulse. The resultant SFG spectrum is dispersed with a spectrograph and detected in parallel with a scientific-grade CCD detector, permitting rapid and high signal-to-noise ratio data acquisition over a 400-cm(-1) spectral region with...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Optics Express
سال: 2011
ISSN: 1094-4087
DOI: 10.1364/oe.19.018997