Band-limited zone plates for single-sideband holography

2009 ◽  
Vol 48 (34) ◽  
pp. H64 ◽  
Author(s):  
Yasuhiro Takaki ◽  
Yumi Tanemoto
Keyword(s):  
Zone Plates ◽  
Single Sideband ◽  
Band Limited

scholarly journals Holographic near-eye display based on complex amplitude modulation with band-limited zone plates

2021 ◽  
Author(s):  
Yun Chen ◽  
Minjie Hua ◽  
Tianshun Zhang ◽  
Mingxin Zhou ◽  
Jianhong Wu ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Complex Amplitude ◽  
Zone Plates ◽  
Band Limited

Object Wave Determination by Single-Sideband Methods

1973 ◽  
Vol 31 ◽  
pp. 266-267
Author(s):  
Kenneth H. Downing ◽  
Benjamin M. Siegel
Keyword(s):  
Phase Shift ◽  
Carbon Films ◽  
Object Wave ◽  
Electron Wave ◽  
Phase Object ◽  
Heavy Atoms ◽  
Single Sideband ◽  
Thin Carbon ◽  
Additional Phase Shift ◽  
Additional Phase

Under the “weak phase object” approximation, the component of the electron wave scattered by an object is phase shifted by π/2 with respect to the unscattered component. This phase shift has been confirmed for thin carbon films by many experiments dealing with image contrast and the contrast transfer theory. There is also an additional phase shift which is a function of the atomic number of the scattering atom. This shift is negligible for light atoms such as carbon, but becomes significant for heavy atoms as used for stains for biological specimens. The light elements are imaged as phase objects, while those atoms scattering with a larger phase shift may be imaged as amplitude objects. There is a great deal of interest in determining the complete object wave, i.e., both the phase and amplitude components of the electron wave leaving the object.

THE EFFECTS OF MANUFACTURING INACCURACIES ON THE IMAGING PROPERTIES OF ZONE PLATES

1984 ◽  
Vol 45 (C2) ◽  
pp. C2-93-C2-96
Author(s):  
M. J. Simpson ◽  
M. T. Browne ◽  
R. E. Burge ◽  
P. Charalambous ◽  
P. J. Duke ◽  
...  
Keyword(s):  
Zone Plates ◽  
Imaging Properties

Method of estimation of hidden correlation of narrowband noise signals

2019 ◽  
pp. 34-39 ◽  
Author(s):  
E.I. Chernov ◽  
N.E. Sobolev ◽  
A.A. Bondarchuk ◽  
L.E. Aristarhova
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
New Technology ◽  
Digital Signal ◽  
Measuring Instruments ◽  
Central Frequency ◽  
Pearson Criterion ◽  
Useful Signal ◽  
Band Limited ◽  
Narrowband Noise

The concept of hidden correlation of noise signals is introduced. The existence of a hidden correlation between narrowband noise signals isolated simultaneously from broadband band-limited noise is theoretically proved. A method for estimating the latent correlation of narrowband noise signals has been developed and experimentally investigated. As a result of the experiment, where a time frag ent of band-limited noise, the basis of which is shot noise, is used as the studied signal, it is established: when applying the Pearson criterion, there is practically no correlation between the signal at the Central frequency and the sum of signals at mirror frequencies; when applying the proposed method for the analysis of the same signals, a strong hidden correlation is found. The proposed method is useful for researchers, engineers and metrologists engaged in digital signal processing, as well as developers of measuring instruments using a new technology for isolating a useful signal from noise – the method of mirror noise images.

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