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Karl Wilhelm Andreas Strehl (April 30, 1864 – June 14, 1940) was a German physicist, mathematician, and writer. He is notable for the Strehl ratio, a widely used measurement for the optical quality of an imaging system.

See also

• Strehl ratio

References

1. Hopf, Johannes. "Kurt Hopf – Astronomie – Karl Strehl Strehlwert Definitionshelligkeit". www.kurt-hopf.de.
2. Strehl, K. 1895, Aplanatische und fehlerhafte Abbildung im Fernrohr, Zeitschrift für Instrumentenkunde 15 (Oct.), 362–370.
3. Strehl, K. 1902, Über Luftschlieren und Zonenfehler, Zeitschrift für Instrumentenkunde, 22 (July), 213–217. [PDF file]

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