飞行模拟器用投射系统设计

研究了一种瞄准镜用飞行模拟器投射镜头的设计，并给出了模拟器投射镜头的设计实例。模拟器由显示系统、屏幕、投射系统、反射镜组成，模拟图像信号送入模拟器的显示系统，显示系统将视景仿真模拟图像信号投射到屏幕上，屏幕位于投射系统的焦平面上，瞄准镜对由模拟器进入的光线成像实现成像模拟。投射系统由周边系统、中心系统共9路光学镜头组成，投射系统周边系统、中心系统对应于瞄准镜的中心系统与周边系统，中心系统与周边系统的物面位置重合即共物面；中心系统采用摄远物镜镜形式缩短了镜头长度结构更加紧凑。周边系统焦距为f=263．02mm，视场角为2ω=17°，全视场畸边〈0．4％，在屏幕的Nyquist频率处全视场的MTF〉0．9，系统长度330mm；中心系统焦距为f=295．00mm，视场角为2ω=17°，全视场畸变〈0．37％，在屏幕的Nyquist频率处全视场的MTF〉0．9，系统长度283．2mm。投射系统采用全口径出光，同时系统通光口径略大于敏感器的通光口径，降低了系统装配的精度。

Design of Projecting System for the Flight Simulator

After comparing different structures of projecting lenses,a new projecting lens for the flight simulator is designed.The flight simulator is composed of display system,screen,projecting system,reflector.The simulated image of earth is input into the display system of the flight simulator,the display system project the simulated image onto the screen which is played at focal plane of projecting system,the ray coming from screen is focused on the detector of the spaceship optics aiming lens.The projecting system is composed of nine peripheral lenses,one central lens,both peripheral lens’s focal plane and central lens’s focal plane are placed at same plane.The central system is in the form of telephotolens,its length more shorten and its structure more compact.The focal length of the peripheral system is 263.02 mm,the full field of view reaches 17°,the barrel distortion of the peripheral system is smaller than 0.4%,MTF is greater than 0.9 at the Nyquist frequency,the length of the peripheral system is 330 mm.The focal length of the central system is 295 mm,the full field of view reaches 17°,the barrel distortion of the peripheral system is smaller than 0.37%,MTF is greater than 0.9 at the Nyquist frequency,the length of the peripheral system is 283.2 mm.The diameters of exit pupil is greater than the aperture of the spaceship optics aiming lens for the purpose of decreasing accuracy of allignment.