scholarly journals Microshape Measurement Method Using Speckle Interferometry Based on Phase Analysis

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 112
Author(s):  
Yasuhiko Arai
Keyword(s):  
Fine Structure ◽  
Phase Analysis ◽  
Measurement Method ◽  
Phase Distribution ◽  
Periodic Structures ◽  
Scattered Light ◽  
Speckle Interferometry ◽  
Diffraction Limit ◽  
Silica Microspheres ◽  
Measured Object

A method for the measurement of the shape of a fine structure beyond the diffraction limit based on speckle interferometry has been reported. In this paper, the mechanism for measuring the shape of the fine structure in speckle interferometry using scattered light as the illumination light is discussed. Furthermore, by analyzing the phase distribution of the scattered light from the surface of the measured object, this method can be used to measure the shapes of periodic structures and single silica microspheres beyond the diffraction limit.

scholarly journals Shape Measurement Method of Two-Dimensional Micro-Structures beyond the Diffraction Limit Based on Speckle Interferometry

Photonics ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 420
Author(s):  
Yasuhiko Arai
Keyword(s):  
Phase Distribution ◽  
Scattered Light ◽  
Three Dimensional ◽  
Speckle Interferometry ◽  
Diffraction Limit ◽  
Objective Lens ◽  
Two Dimensional ◽  
Phase Detection ◽  
Fibrous Materials ◽  
Noise Component

A technique based on speckle interferometry for observing microstructures beyond the diffraction limit by detecting the spatial phase distribution of scattered light from microstructures has previously been reported. In this study, the development of this technique using a two-dimensional method is discussed. In order to observe general two-dimensional images, development of new technology in several stages is required. A two-dimensional filtering technique to reduce the noise component and a two-dimensional integration path to detect the three-dimensional shape of the surface are described in detail. As a first step toward observing complex two-dimensional structures in the future, it is investigated that directional two-dimensional information such as fibrous materials and micro-linear structures can be visually captured and treated as meaningful two-dimensional structures. As a result, it is shown that it is possible to observe fine two-dimensional letters with a line width of 100 nm, which is beyond the diffraction limit of the objective lens, demonstrating the effectiveness of the observation technique for microstructures by phase detection.

Amplitude-Phase Analysis of Cosmic Microwave Background Maps

2005 ◽  
Vol 201 ◽  
pp. 134-137
Author(s):  
D. Novikov ◽  
P. Naselsky ◽  
J. Silk
Keyword(s):  
Cosmic Microwave Background ◽  
Phase Analysis ◽  
Phase Distribution ◽  
Point Sources ◽  
Microwave Background ◽  
Novel Method

We propose a novel method for the extraction of unresolved point sources from CMB maps. This method is based on the analysis of the phase distribution of the Fourier components for the observed signal and unlike most other methods of denoising does not require any significant assumptions about the expected CMB signal. The aim of our investigation is to show how, using our algorithm, the contribution from point sources can be separated from the resulting signal on all scales.

scholarly journals Local investigation of the optical properties of subwavelength rectangular holes with a focused beam of electrons

2011 ◽  
Vol 369 (1950) ◽  
pp. 3456-3471 ◽  
Author(s):  
J. C. Prangsma ◽  
D. van Oosten ◽  
L. Kuipers
Keyword(s):  
Optical Properties ◽  
Spatial Distribution ◽  
Gold Film ◽  
Scattered Light ◽  
Diffraction Limit ◽  
Optical Diffraction ◽  
Hole Shape ◽  
Small Clusters ◽  
Focused Beam ◽  
Shape And Size

The optical properties of rectangular subwavelength holes in a gold film are investigated using the light generated when a focused beam of electrons impinges on the sample close to the hole. Using this technique, multi-spectral maps of the holes are obtained with a resolution beyond the optical diffraction limit. The results show the influence of hole shape on the spectrum of locally scattered light. Rectangular holes of varying shape and size are investigated, and the spatial distribution of the polarization of the observed light is measured. The influence of neighbouring holes is investigated by measuring small clusters of holes.

D25 Development of Optical Measurement Method beyond the Diffraction Limit for Microstructures

2014 ◽  
Vol 2014.10 (0) ◽  
pp. 241-242
Author(s):  
Hiromasa KUME ◽  
Hiroki YOKOZEKI ◽  
Ryota KUDO ◽  
Satoru TAKAHASHI ◽  
Kiyoshi TAKAMASU
Keyword(s):  
Measurement Method ◽  
Optical Measurement ◽  
Diffraction Limit ◽  
Optical Measurement Method
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