Ebenbild image, likeness, similarity. 



Ebene optical flat (opt.); plane, 

 plain. 



Ebene, in einer - mit coplanar 

 with, flush with. 



ebene Welle plane wave. 



Ebene, Bezugs- datum level, d. 

 plane, reference 1., fiducial 1. 

 Blenden- diaphragm plane. Brenn-, 

 hintere back focal plane. Brenn-, 

 vordere front focal plane. Ein- 

 falls- plane of incidence. Ein- 

 stell- focal plane. Einstel lungs- 

 focusing plane. Flucht- vanish- 

 ing plane. Halb- semi-plane, 

 half-p., H-p. Haupt- principal 

 plane, p. surface. Hyper- hyper- 

 plane. Kristall- cry stsil" plane, 

 c. face. Netz- lattice plane, 

 plane-family of a crystal. 



Ebene, Polarisations- plane of 

 polarization. Drehung der- 

 polarization error. 



Ebene, Reflexions- plane of re- 

 flection. Schmiegungs- osculat- 

 ing plane. Spalt- cleavage plane, 

 c. face. Symmetrie- plane of 

 symmetry, crystallographic p. 

 Tei lungs- plane of division. 



Ebenenabstand, Haupt- principal 

 plane distance. 



Ebenheit planarity, flatness, 

 smoothness, evenness. 



Ebenmass symmetry. 



Ebnung, Bildfeld- flattening of 

 image field. 



Ebnungsl inse, Feld- field flattener. 



Echelettegitter echelette grating 

 (opt.). 



Echo, stufenförmiges echelon- forma- 

 tion of multiple echoes. 



Echo, Hörer- listener echo. Mehr- 

 fach- multiple echo, reverbera- 



tion, flutter e. Schein- pseudo 

 echo. Vielfach- multiple echo, 

 flutter e. Wellen- radio (signal 

 or wave) echo, wave reflection 

 (involving one or more hops to 

 ionosphere and back). 



Echo- lot sonic altimeter, sound- 

 ranging a. , echo depth sounder, 

 fathometer, -lotung echo sound- 

 ing, echo or reflection altitude 

 or distance measurement and rang- 

 ing; radar or radio locator, 

 sonar work (predicated upon echo 

 principle), -paare paired echoes. 

 -Stromdämpfung echo current at- 

 tenuation; active return loss. 

 -Unterdrückung echo suppression, 

 e. killing, damping of reverbera- 

 tions (by sound absorbing material). 

 -weite echo area, effective scat- 

 tering cross-section of radar 

 target, -werk swell organ. 

 -Wirkung echo effect. 



echt, dampf- fast to steam, koch- 

 fast to boiling, licht- fast to 

 light, non-fading. 



echtes, absolutes Gehör genuine ab- 

 solute pitch. 



echte Längenmessung direct measure- 

 ment of length. 



Eck, Seiten- lateral summit WCfrfel- 

 corner of a cube, cubic summit. 



Ecke corner, angle, edge (of a 

 plane angle), summit (of a crys- 

 tal), quoin. 



Ecke, Mittel- lateral summit. 



Eckfrequenz corner frequency, sharp 

 cut-off frequency (filter). 



eck i g angular, cornered, angled. 



edel noble, non-base, rare, 

 precious, rich, vital, inert (gas). 



Edel -erde rare earth, -gas rare or 

 noble gas, inert gas (in atmos- 



