If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Theoretical background of defocus image modulation processing (DIMP) based on three dimensional optical transfer functions (3D-OTFs)

$30.41 plus tax (Refund Policy)

Buy Article:

Abstract:

Defocus-image modulation processing (DIMP), where a bipolar weighted image integration of the observed defocus series is performed, is one of the most promising approaches for real-time observation of spherical-aberration-free phase and amplitude images with a transmission electron microscope. DIMP can be extended to hollow-cone illumination (HCI) to improve the resolution of the electron microscope significantly, which has been already confirmed in the experiment using an optical microscope. In this paper, the theoretical background of DIMP is investigated by using 3D-OTFs in 3D-Fourier space. First, 3D-OTFs are derived under coherent illumination and the filtering characteristics of the DIMP are interpreted using the 3D-OTFs. Then the bipolar weighting functions used in DIMP are obtained by inverse Fourier transform of the filter functions in 3D-Fourier space under axial and hollow-cone illuminations.

Keywords: Transmission electron microscope; defocus image modulation processing (DIMP); hollow-cone illumination; three-dimensional optical transfer function

Document Type: Original Article

DOI: http://dx.doi.org/10.1078/0030-4026-00012

Affiliations: 1: Department of Material and Life Science, Osaka University, Yamada-oka 2-1, Suita, Osaka 565, Japan 2: Department of Lightwave Sciences, Osaka Electro-Communication University, 18-8 Hatsu-cho, Neyagawa, Osaka 572, Japan

Publication date: February 1, 2001

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more