Some articles on dark field, dark:
... In dark field imaging (also termed diffraction contrast imaging) researchers adjust the excitation of the objective lens so as to produce an image of the diffraction pattern in the middle ... scientists to image diffraction intensities that may be of particular interest (dark field) ... if a researcher wants to map out the origin of some particular diffraction intensity, dark field analysis allows one to image (in real-space) where the particular intensity originates from ...
... Annular dark-field imaging is a method of mapping samples in a scanning transmission electron microscope (STEM) ... by collecting scattered electrons with an annular dark-field detector ... In traditional dark-field imaging, an objective aperture is placed in the diffraction plane so as to only collect electrons scattering through that aperture, avoiding the main beam ...
Famous quotes containing the words field and/or dark:
“... no young colored person in the United States today can truthfully offer as an excuse for lack of ambition or aspiration that members of his race have accomplished so little, he is discouraged from attempting anything himself. For there is scarcely a field of human endeavor which colored people have been allowed to enter in which there is not at least one worthy representative.”
—Mary Church Terrell (18631954)
“Does the road wind uphill all the way?
Yes, to the very end.
Will the days journey take the whole long day?
From morn to night, my friend.
But is there for the night a resting-place?
A roof for when the slow, dark hours begin,”
—Christina Georgina Rossetti (18301894)