Skiopticon image from the Department of Photography at the Royal Institute of Technology. Use by Professor Helmer Bäckström as lecture material. Bäckström was Sweden's first professor in photography at the Royal Institute of Technology in Stockholm picture: At the far left an electric lens. The middle figure shows its ekvipotential surfaces. At the far right magnetic lens according to Knoll and Ruska. Slashed surface marks iron capsule, black marks unnagnetic material that pads the gap in iron capsule, routed surfaces mark wire winding. Lower image: various forms of electronic
Skiopticon image from the Department of Photography at the Royal Institute of Technology. Use by Professor Helmer Bäckström as lecture material. Bäckström was Sweden's first professor in photography at the Royal Institute of Technology in Stockholm picture: At the far left an electric lens. The middle figure shows its ekvipotential surfaces. At the far right magnetic lens according to Knoll and Ruska. Slashed surface marks iron capsule, black marks unnagnetic material that pads the gap in iron capsule, routed surfaces mark wire winding. Lower image: various forms of electronic more info See: Bäckström, Helmer. Photographic manual. Nature and Culture. Stockholm. 1942. p. 929.
Size: 2439px × 2049px
Photo credit: © BTEU/TEKNISKA / Alamy / Afripics
License: Licensed
Model Released: No
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