Photoemitter
Photomultiplier tube having a plurality of sensing areas
Photomultiplier tube having a stress isolation cage assembly
Photomultiplier tube having directional alkali metal vapor evapo
Photomultiplier with dynode support structure
Phototube having apertured electrode recessed in cup-shaped elec
Phototube having domed mesh with non-uniform apertures
Phototube having improved electron collection efficiency
Pip inverter tube cathode housing
Proportional counter end effects eliminator