飞行模拟器目标显示变焦距系统设计

介绍了飞行模拟器的原理及方案。讨论了飞行模拟器中目标显示变焦距成像系统的光学设计方案。探讨了垂轴放大率时的变焦距系统的特性 ,在垂轴放大率时变倍组和补偿组的共轭距均处于极值 ,在此处补偿组进行平滑换根 ,使补偿组位移曲线的上半段与下半段平滑相连 ,可以让补偿组也为整个系统变倍作出贡献 ,使得凸轮导程缩短 ,达到减小系统外形尺寸的目的。利用阻尼最小二乘法拟合出整个变焦过程中系统最佳像面的位置曲线 ,并按此设计凸轮曲线 ,即可保证系统在整个变焦过程中成像质量均处于最佳状态。成功地将上述思路应用于飞行模拟器变焦距成像系统中 ,取得了很好的效果

Design of target imaging zoom system for flight simulator

The principle of a flight simulator and its implementation are described The design of a zoom lens for target imaging in the flight simulator is discussed It is shown that the conjugate distance of a moving lens group (including the zooming group and the compensating group) reaches to its extreme value when the magnification of the lens group equals to -1 At this point, by means of a smooth transition between two possible cam curves of the compensating group, the group's power can be made to contribute to the magnification variation of the zoom system, resulting in a reduction of the moving scope of the cam curve and the size of the whole system The optimization of the zoom system is achieved using an optical CAD program developed A scheme is proposed to adjust the cam curve according to the best focus of the system, which is successfully implemented in the target imaging zoom system