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Item _em_micrographs.astigmatism_flag


Description 

 Astigmatism(axial): an electron-optical lens aberration that causes 
  the defocus to be a function of azimuth, and the contrast transfer 
  function to deviate from circular symmetry about the optical axis. 
  As a consequence, the Thon rings deform into elliptic or hyperbolic 
  patterns, depending on the size of defocus and the size of the 
  astigmatic defocus difference. 
  A flag for   Y or N  for astigmatism estimation

Category

em_micrographs

Mandatory Code

no

Data Type Code

ucode

Enumeration Values

Item Value Description
N n.a.
NO n.a.
Y n.a.
YES n.a.

 

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