Conventional head-up displays have a restricted field of view caused by the relatively small diameter of the collimating optics. There is a growing interest in alternative designs which make a greater field of view available to the pilot. Several possible design options for achieving a wide field are outlined. The new methods usually rely on the properties of diffractive optical elements to achieve a satisfactory performance with respect to accuracy, photometric efficiency and sunlight rejection. Some advantages arising from the particular characteristics of diffractive elements are considered. Most wide field of view displays are of the 'projected porthole' type, i.e. the exit pupil of the system is not within the equipment but is instead projected to the observer's eye position. Definitions of the instantaneous and total fields of view are discussed and compared with those for the conventional head-up display. Economic justification of the wide field of new displays is also discussed.
Wide field of view head-up displays
Das grosse Feld der Flugzeuganzeigeinstrumente
Displays Technology and Applications ; 4 , 2 ; 89-96
1983
8 Seiten, 11 Quellen
Article (Journal)
English
FLUGZEUG , AVIONIK , ANZEIGETECHNIK , ANZEIGEELEMENT , OPTIK , DISPLAY , GENAUIGKEITSKLASSE , BLENDUNG , BLICKWINKEL
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