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Science 27 May 1966:
Vol. 152. no. 3726, pp. 1238 - 1239
DOI: 10.1126/science.152.3726.1238
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Articles

Rotation Technique in Radially Symmetric Electron Micrographs: Mathematical Analysis

Richard S. Norman 1

1 Program in Communication Sciences, University of Michigan, Ann Arbor

The rotation operation of order m operating on a signal removes all spatial frequencies not multiple to m. Anomalous reinforcements, causing misinterpretation, can be discounted without following previously suggested restrictions. The improvement in signal-to- noise ratio is less than m, in contrast to signal averaging of electrophysiology. A dove prism and stroboscope can implement the technique.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)