Discussion Forum : Avionics
Question -
The main reason for using a collimated display in HUD is ________
Answer: Option C
A COLLIMATED DISPLAY IS A DISPLAY IN WHICH THE RAYS OF LIGHT EMITTED/REFLECTED IS PARALLEL TO THE DISPLAY. SINCE THE RAYS OF LIGHT ARE PARALLEL, ITS FOCUS IS AT INFINITY, THUS THE PILOT IS ABLE TO VIEW THE INFORMATION ON THE HUD WITHOUT CHANGING HIS FOCUS FROM THE OUTSIDE WORLD SCENE WITHOUT PARALLAX ERROR. ALSO, THE RAY OF LIGHT FROM A COLLIMATED DISPLAY WOULD NOT DISPERSE WITH DISTANCE.
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A COLLIMATED DISPLAY IS A DISPLAY IN WHICH THE RAYS OF LIGHT EMITTED/REFLECTED IS PARALLEL TO THE DISPLAY. SINCE THE RAYS OF LIGHT ARE PARALLEL, ITS FOCUS IS AT INFINITY, THUS THE PILOT IS ABLE TO VIEW THE INFORMATION ON THE HUD WITHOUT CHANGING HIS FOCUS FROM THE OUTSIDE WORLD SCENE WITHOUT PARALLAX ERROR. ALSO, THE RAY OF LIGHT FROM A COLLIMATED DISPLAY WOULD NOT DISPERSE WITH DISTANCE.
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