scholarly journals Re-Interpretations of Gotlandic Picture Stones Based on the Reflectance Transformation Imaging Method (RTI): Some Examples

Author(s):  
Sigmund Oehrl ◽  
2022 ◽  
Vol 58 (2) ◽  
pp. 32-38
Author(s):  
Barbora Borůvková ◽  
Klára Burianová

Current technological developments offer an inexhaustible number of procedures for digitization. However, technological equipment intended for teams in professional laboratories reaches price levels that cultural institutions often do not have enough finances. Procedures and methods using equipment, which institutions often already own or are not so expensive to acquire, come to the fore. One of them is the RTI (Reflectance Transformation Imaging) method, which creates a spatial relief composed of a sequence of images with visible lighting. The RTI method is very successful in depicting illegible or wiped details and is already widely used in archaeology.


Author(s):  
T. Y. Tan ◽  
W. K. Tice

In studying ion implanted semiconductors and fast neutron irradiated metals, the need for characterizing small dislocation loops having diameters of a few hundred angstrom units usually arises. The weak beam imaging method is a powerful technique for analyzing these loops. Because of the large reduction in stacking fault (SF) fringe spacing at large sg, this method allows for a rapid determination of whether the loop is faulted, and, hence, whether it is a perfect or a Frank partial loop. This method was first used by Bicknell to image small faulted loops in boron implanted silicon. He explained the fringe spacing by kinematical theory, i.e., ≃l/(Sg) in the fault fringe in depth oscillation. The fault image contrast formation mechanism is, however, really more complicated.


Author(s):  
Akira Tonomura

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.


2011 ◽  
Vol 59 (S 01) ◽  
Author(s):  
S Ihlenburg ◽  
A Rüffer ◽  
T Radkow ◽  
A Purbojo ◽  
M Glöckler ◽  
...  

2008 ◽  
Vol 39 (01) ◽  
Author(s):  
AJ Fallgatter ◽  
AC Ehlis ◽  
MM Richter ◽  
M Schecklmann ◽  
MM Plichta

2015 ◽  
Vol 36-37 (1) ◽  
pp. 51-63 ◽  
Author(s):  
Roy Towers ◽  
Nick Card

This paper describes a hitherto unidentified adaptation in Grooved Ware pottery at the Ness of Brodgar, Orkney ( Fig. 1 ). The technological technique adopted appears designed to cope with a common problem of Grooved Ware potters at the Ness: that of detached cordons, where applied decorative cordons on the exterior surface of the vessels are knocked off or simply fall off. The evidence shows that, in the case of one large pottery deposit from the site, some vessel exteriors were specially prepared in order to ensure cordon adhesion. The Ness of Brodgar site is introduced, issues surrounding pottery production and applied decoration in the Late Neolithic, particularly in Orkney, are noted and the problem-solving sherds are described. The paper is illustrated in part by the use of Reflectance Transformation Imaging (RTI).


2013 ◽  
Vol E96.B (7) ◽  
pp. 2014-2023 ◽  
Author(s):  
Ryo YAMAGUCHI ◽  
Shouhei KIDERA ◽  
Tetsuo KIRIMOTO

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