搜索结果: 1-15 共查到“光学工程 Z-transform”相关记录16条 . 查询时间(0.109 秒)
Researchers transform slow emitters into fast light sources
Researchers transform slow emitters fast light sources
2015/11/12
Researchers from Brown University, in collaboration with colleagues from Harvard, have developed a new way to control light from phosphorescent emitters at very high speeds. The technique provides a n...
EFFICIENT HOUGH TRANSFORM FOR AUTOMATIC DETECTION OF CYLINDERS IN POINT CLOUDS
Cylinder detection Object recognition Hough Transform Reverse Engineering
2015/8/13
We present an efficient Hough transform for automatic detection of cylinders in point clouds. As cylinders are one of
the most frequently used primitives for industrial design, automatic and ro...
Fourier-Transform, Integrated-Optic Spatial-Heterodyne Spectrometer with 1 GHz Resolution on a Silica-Based Planar Waveguide
Waveguides planar Spectroscopy Fourier transforms Integrated optics devices
2015/5/26
We present fabrication details and measurements of a high-resolution planar-waveguide spatial heterodyne spectrometer incorporating 64 asymmetric Mach-Zehnder interferometers.Measurements verify 1 GHz...
Research on new spectral reconstruction solutions for Fourier-transform spectrometer
imaging spectroscopy reconstruction spectrum Fourier transform Hilbert transform
2011/5/5
The spectral reconstruction of Fourier transform spectrometer can be simply achieved by using
a Fourier transform or a Fourier cosine transform. However, the traditional Fourier transform
solution i...
Comparison of wavelet, Gabor and curvelet transform for face recognition
wavelet transform Gabor wavelet curvelet transform face recognition multiscale analysis
2011/5/5
There has been much research about using Gabor wavelet for face recognition. Other multiscale
geometrical tools, such as curvelet and contourlet, have also been used for face recognition, thus
it is...
Novel Optical Fast Fourier Transform Scheme Enabling Real-Time OFDM Processing at 392 Gbit/s and Beyond
Optical communications Discrete optical signal processing
2015/6/10
An optical FFT scheme is implemented and tested at 392 Gbit/s. It enables OFDM sig-nal processing way beyond the bandwidth limits of electronics. The scheme operates with little energy as it exploits ...
Impact of Polarization-mode Dispersion on Wavelet Transform Based Optical OFDM Systems
Fiber optics communications Modulation
2015/6/4
The impact of PMD on wavelet transform based optical OFDM (WTO-OFDM) systems is investigated. Simulations show that WTO-OFDM is very sensitive to PMD. A 1-dB penalty at 5-ps DGD is incurred for 112-Gb...
Noise reduction for digital holograms in a discrete cosine transform (DCT) domain
digital hologram noise reduction discrete cosine transform holographic reconstruction
2011/5/9
This paper presents a method for reducing noise in a digital hologram, which occurs during
acquisition. The algorithm proposed initially transforms a digital hologram into frequency-domain
data thro...
Wavelength - Tunable Nearly - Transform - Limited Pulse Generation Based on Fiber Optical Parametric Oscillator
Tunable Nearly Limited Pulse Generation Based Fiber Optical Parametric Oscillator
2015/7/16
We demonstrate an all-fiber widely-tunable sub-picosecond fiber optical parametric oscillator based on highly - no nlinear dispersion - shifted fiber. Nearly - transform - limited sub - picosecond pul...
Fourier-transform Spectroscopic Technique for Multi-spectral Nonlinear Microscopy Using a 5-fs Broadband Light Source
Four-wave mixing Nonlinear optical spectroscopy Fourier-transform spectroscopy
2009/6/2
We propose nonlinear Fourier-transform spectroscopy using a broadband pulse, which can discriminate the origin in Four-wave mixing (FWM) process. By taking account of the response function of a sample...
An efficient method for human face recognition using nonsubsampled contourlet transform and support vector machine
multiscale geometric analysis face recognition
2011/5/10
To improve the recognition rate in different conditions, a multiscale face recognition method based on nonsubsampled contourlet transform and support vector machine is proposed in this paper. Firstly,...
An image fusion algorithm based on polyharmonic local sine transform (PHLST)
image fusion performance metric
2011/5/6
In this paper, we propose a novel image fusion algorithm based on polyharmonic local sine transform (PHLST). First, we apply PHLST to source image to decompose it into two components: polynomial p and...
Application of Wigner transform for characterization of aberrated laser beams
laser beams laser optics beam quality Wigner transform aberrations
2011/4/26
The slit scan method was implemented for registration of intensity profiles along the caustics of a laser beam. The inverse Radon transform of spatially normalized intensity profiles enables direct co...
Holographic optical elements for Fourier transform (HOE-FT) used in the optical memory system are considered in this paper. The determination of the optimal page composer capacity allows for the appro...
Holographic elements for Fourier transform
Fourier transform holographic elements phase transfer function
2011/4/25
Problems of designing the holographic Fourier transform elements are described. First, two different configurations for a Fourier transform setup are considered. The converging beam Fourier transform ...