‎"RECKNAGEL, A.‎
‎Theorie des elektrischen Elektronenmikroskops für Selbststrahler‎

‎Berlin, Springer, 1941. 8vo. In contemporary halv cloth with gilt lettering to spine. In ""Zeitschrift für Physik"", Bd. 117, 1941. Entire volume offered. Stamp to front free end-paper. Fine and clean. Pp. 689-708. [Entire volume: VIII, 818 pp.].‎

Reference : 49301

‎First printing of Recknagel's paper in which he showed that the immersion objective lens, which is a crucial part of a Emission Electron Microscope that accelerates the electrons emitted at quite low energy E0 to some final energy E and forms the first image of the emitting surface, has surprisingly good properties. Its basic aberration coefficients are proportional to the ratio E0/E so that they keep decreasing down to lowest emission energies.Here he concluded that there were no reason in principle to prevent the emission microscope from attaining the resolution of the light microscope. ‎