scholarly journals Distribution of the complex amplitude and intensity in a 3D scattering pattern formed by the optical system for an on-axis point object

2018 ◽  
Vol 42 (3) ◽  
pp. 377-384 ◽  
Author(s):  
S. N. Koreshev ◽  
D. S. Smorodinov ◽  
O. V. Nikanorov ◽  
M. A. Frolova
Keyword(s):  
Quantitative Evaluation ◽  
Optical System ◽  
Three Dimensional ◽  
Complex Amplitude ◽  
Optical Systems ◽  
Depth Of Field ◽  
Scattering Pattern ◽  
Point Object ◽  
Extended Depth Of Field

A quantitative evaluation of the depth of field of optical systems is given. Results of the calculation of the distribution of the complex amplitude and intensity in a three-dimensional scattering pattern formed by the optical system for an on-axis point object are presented. The work was carried out as part of developing optical systems with an extended depth of field for a synthesized hologram of a point object located on a perpendicular constructed to the hologram center.

Atomic Resolution in Crystal Aperture Stem

1990 ◽  
Vol 48 (1) ◽  
pp. 236-237
Author(s):  
J T Fourie
Keyword(s):  
Optical System ◽  
Spherical Aberration ◽  
Three Dimensional ◽  
Transmission Function ◽  
Optical Systems ◽  
Bragg Angle ◽  
Electron Optical System ◽  
Intimate Contact ◽  
Diffraction Effects ◽  
Design Aspect

The attempts at improvement of electron optical systems to date, have largely been directed towards the design aspect of magnetic lenses and towards the establishment of ideal lens combinations. In the present work the emphasis has been placed on the utilization of a unique three-dimensional crystal objective aperture within a standard electron optical system with the aim to reduce the spherical aberration without introducing diffraction effects. A brief summary of this work together with a description of results obtained recently, will be given.The concept of utilizing a crystal as aperture in an electron optical system was introduced by Fourie who employed a {111} crystal foil as a collector aperture, by mounting the sample directly on top of the foil and in intimate contact with the foil. In the present work the sample was mounted on the bottom of the foil so that the crystal would function as an objective or probe forming aperture. The transmission function of such a crystal aperture depends on the thickness, t, and the orientation of the foil. The expression for calculating the transmission function was derived by Hashimoto, Howie and Whelan on the basis of the electron equivalent of the Borrmann anomalous absorption effect in crystals. In Fig. 1 the functions for a g220 diffraction vector and t = 0.53 and 1.0 μm are shown. Here n= Θ‒ΘB, where Θ is the angle between the incident ray and the (hkl) planes, and ΘB is the Bragg angle.

scholarly journals Complex Amplitude Filters for Extended Depth of Field

2010 ◽  
Vol 2 (4) ◽  
Author(s):  
Jorge Ojeda-Castaneda ◽  
E. Yepez-Vidal ◽  
E. Garcia-Almanza
Keyword(s):  
Complex Amplitude ◽  
Depth Of Field ◽  
Extended Depth Of Field

Analysis of optical systems with extended depth of field using the Wigner distribution function

2006 ◽  
Vol 45 (34) ◽  
pp. 8586 ◽  
Author(s):  
Qingguo Yang ◽  
Liren Liu ◽  
Jianfeng Sun ◽  
Yongjian Zhu ◽  
Wei Lu
Keyword(s):  
Distribution Function ◽  
Wigner Distribution ◽  
Optical Systems ◽  
Depth Of Field ◽  
Wigner Distribution Function ◽  
Extended Depth Of Field

scholarly journals Three dimensional multi-molecule tracking in thick samples with extended depth-of-field

2015 ◽  
Vol 23 (2) ◽  
pp. 787 ◽  
Author(s):  
Heng Li ◽  
Danni Chen ◽  
Gaixia Xu ◽  
Bin Yu ◽  
Hanben Niu
Keyword(s):  
Three Dimensional ◽  
Depth Of Field ◽  
Extended Depth Of Field

Three-dimensional tomography using a cubic-phase plate extended depth-of-field system

1999 ◽  
Vol 24 (4) ◽  
pp. 253 ◽  
Author(s):  
Daniel L. Marks ◽  
Ronald A. Stack ◽  
David J. Brady ◽  
Joseph van der Gracht
Keyword(s):  
Three Dimensional ◽  
Depth Of Field ◽  
Cubic Phase ◽  
Phase Plate ◽  
Field System ◽  
Extended Depth Of Field

Extended depth of field in images through complex amplitude pre-processing and optimized digital post-processing

2014 ◽  
Vol 40 (1) ◽  
pp. 29-40 ◽  
Author(s):  
L.M. Ledesma-Carrillo ◽  
M. Lopez-Ramirez ◽  
C.A. Rivera-Romero ◽  
A. Garcia-Perez ◽  
G. Botella ◽  
...  
Keyword(s):  
Complex Amplitude ◽  
Depth Of Field ◽  
Post Processing ◽  
Extended Depth Of Field
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