Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE446817ApublicationCriticalpatent/BE446817A/xx
H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
H01J37/02—Details
H01J37/22—Optical, image processing or photographic arrangements associated with the tube
H01J37/224—Luminescent screens or photographic plates for imaging; Apparatus specially adapted therefor, e. g. cameras, TV-cameras, photographic equipment or exposure control; Optical subsystems specially adapted therefor, e. g. microscopes for observing image on luminescent screen