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Some Reflections on How Much Information is there on a Piece of Film, on How Film Compares with CCD Cameras and what Features a Scanner would need to Digitize TEM Negatives

Published online by Cambridge University Press:  14 March 2018

Alwyn Eades
Alwyn Eades*
Affiliation:
Univ. of Illinois

Extract

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The world of electron microscopy is in a period of transition from acquiring images on film to acquiring images digitally, using CCD cameras, for example. It would be useful to know how much information there is on a piece of film, in order to know how film compares with digital methods and to be able to make good judgements on the optimum moment to change from one technology to the other.

This is an attempt to use simple arguments to estimate just how much information there is in an image exposed on film in the transmission electron microscope. The main reason for addressing this issue is that, while many people are affected by it, there seems to be little agreement on the answer.

Type
Research Article
Information
Microscopy Today , Volume 4 , Issue 1 , February 1996 , pp. 24 - 27
Copyright
Copyright © Microscopy Society of America 1996

References

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Zeitler, E, The photographic emulsion as analog recorder for electrons, Ultramicroscopy, 46 (1992) 405-416.Google Scholar
Krivanek, O L, and Mooney, P E, Applications of slow-scan CCD cameras in transmission electron microscopy, Ultramicroscopy, 49 (1993) 95-108.Google Scholar