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.)
Filing date
Publication date
Application filedfiledCritical
Publication of NL7314289ApublicationCriticalpatent/NL7314289A/xx
G02B3/02—Simple or compound lenses with non-spherical faces
G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
H01J9/22—Applying luminescent coatings
H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
H01J9/2272—Devices for carrying out the processes, e.g. light houses
H01J9/2273—Auxiliary lenses and filters
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Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Optics & Photonics
(AREA)
Engineering & Computer Science
(AREA)
Manufacturing & Machinery
(AREA)
Formation Of Various Coating Films On Cathode Ray Tubes And Lamps
(AREA)
Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes
(AREA)