Discussion Forum : Avionics
Question -
Which of the following is the correct order for the path of light in a HUD?
Answer: Option A
THE SYMBOLS AND FLIGHT PARAMETERS ARE GENERATED AND MAGNIFIED BY THE CRT (CATHODE RAY TUBE) AND IS REFLECTED ALMOST 90° BY A MIRROR. THE REFLECTED RAYS ARE PASSED THROUGH A COLLIMATING LENS WHICH PRODUCES A PARALLEL RAY OF LIGHT WITH FOCUS AT INFINITY. THE COLLIMATED RAYS ARE THEN DISPLAYED IN A COMBINER GLASS WHICH COMBINES THE OUTSIDE WORLD PICTURE WITH THE FLIGHT PARAMETERS GENERATED TO BE VIEWED BY THE PILOT.
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THE SYMBOLS AND FLIGHT PARAMETERS ARE GENERATED AND MAGNIFIED BY THE CRT (CATHODE RAY TUBE) AND IS REFLECTED ALMOST 90° BY A MIRROR. THE REFLECTED RAYS ARE PASSED THROUGH A COLLIMATING LENS WHICH PRODUCES A PARALLEL RAY OF LIGHT WITH FOCUS AT INFINITY. THE COLLIMATED RAYS ARE THEN DISPLAYED IN A COMBINER GLASS WHICH COMBINES THE OUTSIDE WORLD PICTURE WITH THE FLIGHT PARAMETERS GENERATED TO BE VIEWED BY THE PILOT.
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