Improved resolution synthetic aperture holographic imaging

2007 ◽  
Author(s):  
Lluís Martínez-León ◽  
Bahram Javidi
Keyword(s):  
Synthetic Aperture ◽  
Holographic Imaging

scholarly journals Super-resolution Holographic Imaging Techniques Using a Synthetic Aperture

2012 ◽  
Vol 21 (5) ◽  
pp. 27
Author(s):  
Jaeduck JANG ◽  
Jung Hoon PARK ◽  
KyooHyun KIM ◽  
Hyeonseung YU ◽  
YongKeun PARK
Keyword(s):  
Imaging Techniques ◽  
Super Resolution ◽  
Synthetic Aperture ◽  
Holographic Imaging

scholarly journals Ultrasonic Synthetic-Aperture Holographic Imaging†

1992 ◽  
pp. 813-820
Author(s):  
Richard Y. Chiao ◽  
Robert S. Gilmore ◽  
Thomas G. Kincaid
Keyword(s):  
Synthetic Aperture ◽  
Holographic Imaging

Performance and applications of the holography electron microscope

1993 ◽  
Vol 51 ◽  
pp. 1078-1079
Author(s):  
Akira Tonomura
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Phase Measurement ◽  
Electron Holography ◽  
Imaging Method ◽  
High Contrast ◽  
Magnetic Lens ◽  
High Brightness ◽  
Holographic Imaging ◽  
Dynamic Observation

Electron holography is a two-step imaging method. However, the ultimate performance of holographic imaging is mainly determined by the brightness of the electron beam used in the hologram-formation process. In our 350kV holography electron microscope (see Fig. 1), the decrease in the inherently high brightness of field-emitted electrons is minimized by superposing a magnetic lens in the gun, for a resulting value of 2 × 109 A/cm2 sr. This high brightness has lead to the following distinguished features. The minimum spacing (d) of carrier fringes is d = 0.09 Å, thus allowing a reconstructed image with a resolution, at least in principle, as high as 3d=0.3 Å. The precision in phase measurement can be as high as 2π/100, since the position of fringes can be known precisely from a high-contrast hologram formed under highly collimated illumination. Dynamic observation becomes possible because the current density is high.

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