平视显示器（HUD──head－updisplsy）又称平视仪，是将飞机操纵和武器瞄准信息的光学字符和图像通过准在光学系统投影到驾驶员正前方视野的电光显示器。它一般安装在仪表板上部中央，使驾驶员在观察前方外界景物的同时可经看到叠加在外景上的显示信息。平视显示器实际上由平 Head-up display (HUD ─ ─ head-updisplsy), also known as head-up instrument, is the aircraft control and aiming information of the optical characters and images through the optical system projected to the pilot in front of the field of vision electro-optic display. It is generally installed in the upper center of the dashboard, so that drivers can see the superposition of the display on the outside while looking at the outside scenery. Head-up display actually by the flat