Doppelbrechung 



58 



Dorn 



direct sighting telescope. 

 -brechung double refraction, bire- 

 fringence, -diode duodiode, 

 double diode. 



doppeleindeutig one to one. 



Doppel-fernglas field glass, bino- 

 culars, -fernrohr binocular 

 telescope, -gängeraufnahme dual- 

 role work, -gestaltung dimorphign. 

 -gitterröhre bigrid valve, twin- 

 grid tube, four-electrode tube 

 (tetrode, pliodynatron, etc.). 

 -gleichr ichter full-wave recti- 

 fier. 



doppel hörig binaural. 



Doppel- impul sverfahren double- 

 iicpulse method. -Kegelantenne 

 cage antenna, double-cone antenna. 

 -klang echoed sound, hearing 

 sound twice (by electric and by 

 air transmission), -knoten 

 binode. -konusantenne cage 

 antenna, double-cone atenna. 

 -krei sdi agraiii figure-8 diagram, 

 tangent circle pattern. -1 inse 

 double lens, doublet, -lötungen 

 (Dewar-GefäSs) double seals 

 (Dewar vessel). 



doppeln duplicate, copy. 



Doppeln, Film- film duplication. 



Doppel-pedalharfe double-action 

 harp, -platten twin plates or 

 crystals, composite crystal, 

 biquartz. -pi attenKri stall 

 bimorph crystal, divided-plate 

 crystal, biquartz. -quarzkeil 

 double quartz wedge, -ring- 

 Oberf 1 ächenspannungsmesser twin- 

 ring type surface tensiometer. 

 -röhre twin-tube, two-system t., 

 dual amplification t., reflex 

 tube, -röhrenschal tung tandem 

 tube (push-pull) circuit organi- 

 zation. 



doppel sägeförmige Spannung double 

 sawtooth potential. 



Doppel-schichtf ilm sandwich film, 

 double-coated f. -schichtlinse 

 double-layer lens, -schnürspur, 

 Gleichtaktsprossen- variable- 



density double-squeeze sound 

 track. 



doppelseitige Bildabtaströhre two- 

 sided mosaic pickup tube (with 

 separate image anode). -Mosaik- 

 rohre image multiplier iconoscope. 



doppelsinnig ambiguous, equivocal, 

 uncertain, double meaning, "double 

 entendre". 



Doppel sperrkl inKe (cf Klinke) double 

 dog, d. pawls, d. detent. 



doppelspuriger Tonstreifen double- 

 edged variable-width sound track 

 or record. 



Doppel steuerröhre power pentode in 

 which cathode grid is connected 

 with control g. rather than with 

 cathode. 



Doppel -T-AnKer shuttle armature, 

 H-type a. 



doppel t-beriihrend bitangent. 

 -brechend birefringent, bire- 

 fractive. -hochrund convexo- 

 convex, -hohl concavo-concave. 



Doppel-umkehrpr isma inversion 

 prism (reverses or exchanges in 

 both axes of image). -V- Antenne 

 double-V-antenna, doublet. 

 -weggleichr ichter full-wave rec- 

 tifier, -wegschal tung double 

 or full-wave rectifier circuit 

 organization, -wendel system 

 biplane filament system, -zacken- 

 schrift mit Abdeckung bilateral 

 track recording with double-vane 

 shutter; double-edged variable- 

 width track, duplex v. -area t. 

 -zackenschrift, Viel- multiple 

 double-edged variable-width track. 

 -zackenspur, Abdeck- duplex vari- 

 able-area track. -ziJnder time 

 and percussion fuse, combination 

 f. -zungenpfeife double-tongued 

 flute, -zweipol röhre duodiode. 

 -zweipol-Dreipol röhre duodiode- 

 triode tube. -zweipol-Vlerpol- 

 röhre duodiode-tetrode tube. 



Doppler breite Doppler broadening 

 (causing D. width). 



Dorn mandrel, spine, pin, tongue. 



