Leuchtdichte 



73 



Licht, Ober- 



glow, luminescence or luminosity; 

 phosphorescence p. 



Leuchtdichte brightness (in terms 

 of stilb, sb, or apostilb, asb, 

 or other units), intrinsic bril- 

 liance (of a luminous surface). 

 Bildwand- screen brightness, s. 

 luminous density. Dreifarben- 

 tricolor RD (reflection density) 

 value. Schwarz- brightness of 

 black. 



Leuchte lamp equipment (m.p.). 

 Flächen- bank or pillar of lamps, 

 battens. Natrium- sodium lamp. 



Leuchtelektronen emitting electrons, 

 optical e. 



leuchten emit light, shine, glow, 

 luminesce. 



Leuchten, Nach- afterglow, phosphor- 

 escence, persistence of light or 

 of vision (of an image, on re- 

 tina). 



leuchtende Flamme luminous flame. 



Leuchtenergie erzeugend photogenic, 

 fluorogenic, phosphorogenic (as 

 by manganese, in zinc sulfide). 



Leuchter, Selbst- self-luminous 

 substance, fluorescent s., phos- 

 phor. 



Leuchtfaden luminous or glow column; 

 streamer, -einsatz streamer on- 

 set. 



Leucht-farbe luminous paint. 



-f leckdurchmesser spot diameter. 

 -gebilde luminous pattern (lines, 

 bands, or continuous spectra), 

 -hülle luminous sheath, 1. en- 

 velope; photosphere (of sun). 



Leuchtkraft illuminating power, 

 luminosity. -, gemessene lumin- 

 ance, photometric brightness. 

 -bestimmung photometry, -ver- 

 minderer, Nach- poison, killer 

 (of phosphorescence), -ver- 

 st'arker phosphorogen. 



Leucht-kreuz reticle image (re- 

 flector sight), -masse, -ma- 

 terial phosphor, luminescent or 

 phosphorescent substance or ma- 

 terial, -mittel illuminant. 

 -punkt (luminous) spot, -rakete 



flare, -resonator glow-tube re- 

 sonance indicator, -röhre lumin- 

 ous discharge tube; fluorescent t. 

 -schirm fluorescent screen, lumin- 

 escent s., phosphor s.; target, 

 -schirmsubstanz phosphor, fluores- 

 cent substance (for c.-r. tube 

 screens), -spur tracer trajectory. 

 -strahl quel 1 e, einfarbige mono- 

 chromatic illuminator, monochroma- 

 tor. -stofflampe fluorescent 

 lamp, luminous or luminescent 1. 

 or tube, t. containing phosphor, 

 -streifen (bei Entladung) luminous 

 streamer (in discharge), -verfahren, 

 Selbst- self-luminous or s. -emis- 

 sive method (using electrons on 

 object surface). -Zeiger dial 

 light resonance indicator. 

 -Zifferblatt luminous dial. 



L Glied L-type section, filter mesh 

 or network m. 



Libelle level, spirits or water 1. 

 Kreuz- cross level. 



licht(e) light, pale, bright, lumin- 

 ous, clear, inside (of diameter). 

 -(e) weite inside diameter, i. 

 width, lumen, clear aperture (of 

 lens), useful or effective d. 



Licht, auffallendes incident light. 

 -,aüsfal lendes emergent light, 

 transmitted 1. -, direktes specular 

 light. -,durchfal lendes transcid- 

 ent light, transmitted 1. -.ein- 

 fallendes incident light, -»ein- 

 farbiges monochromatic light, homo- 

 geneous 1. -»eingestrahltes in- 

 cident light, exciting 1. -, falsches 

 light fog, leakage 1., stray light 

 (film printing), -»gerichtetes 

 parallel light rays. -, spektral 

 zerlegtes spectroscopically dis- 

 persed or separated light. 

 -,unzerlegtes undispersed light. 



Licht, Blitz- flashlight, flash bulb, 

 magnesium light, lime 1. Flut- 

 floodlight. Gegen- backlight, 

 counter light (m.p.). Kathoden- 

 cathode glow. Neben- light-shot 

 (film). Nord- aurora boreal is. 

 Ober- overhead scoop light, scaffold 



