217 LEBEDEV 



been working at Leningrad University until the present time. 

 He was a Corresponding Member of the U.S.S.R. Academy of 

 Sciences from 1939 to 1943 when he was elected an Academici- 

 an. Lebedev was twice a Deputy to the U.S.S.R. Supreme Soviet. 

 He received a Stalin Prize in 1947 and again in 1949. In 1957 

 he was made a Hero of Socialist Labor. 



In 1919, at the State Optical Institute, Lebedev began a varied 

 study of the processes of annealing optical glass. He formu- 

 lated a theory of temperature conditions for annealing various 

 types of glass. Lebedev investigated the use of interference 

 for measuring wave lengths and indices of refraction. In 1931 

 he designed a polarized interferrometer which was based on 

 light passing through a birefringent lens. He is a prominent 

 Soviet specialist in the area of electronic optics. In 1931, while 

 studying the diffraction of fast electrons, Lebedev used the 

 focusing action of a magnetic lens in an electron diffraction 

 camera. Together with associates, Lebedev designed a Soviet 

 electronic microscope (Stalin Prize 1947). He has also studied 

 photoelectric phenomena, and he directed the construction of a 

 Soviet photographic camera (Stalin Prize 1949). 



In 1958 Lebedev was appointed Chief of the U.S.S.R. Acade- 

 my of Sciences Commission Staff on Radiobiology. As of 1961, 

 he was Chairman of the Permanent Commission for Electron 

 Microscopy. 

 Bibliography: 



On structural transformations in glass, in Structure of 



Glass. Collection of Articles. Mo scow -Leningrad: 1953. 

 Biography: 



Academician A. A. Lebedev, in General Conference of the 



U.S.S.R. Academy of Sciences, September 25-30, 1943. 



Moscow -Leningrad: 1944. 



Academician Aleksandr Alekseevich Lebedev (On the 60th 



Anniversary since the date of birth). Zhur. Eksptl. i Teoret. 



Fiz., 1953, 25, #6(12). 

 Office: Department of Physics 



Leningrad University 

 Leningrad, USSR 



LEBEDEV, SERGEI ALEKSEEVICH (Radio Engineer ) 



S. A. Lebedev was born November 2, 1902. After graduating 

 in 1928 from Moscow Technological College, he worked until 

 1945 in the All-Union Electrotechnical Institute. In 1946 to 

 1951 he was Director of the Institute of Electroengineering at 

 the Ukrainian S.S.R. Academy of Sciences. Lebedev became 



