以非成像理论中光学扩展量的传递规律为依据，给出了激光二极管（LD）阵列作为光源的新型激光投影显示系统中方棒照明光路元器件尺寸及入射光束孔径角的确定方法。选用3×8红光LD阵列作为光源，0.45 inch(1 inch=25.4 mm)硅基液晶(LCOS)芯片为空间光调制器（SLM），应用光学设计软件Zemax给出了方棒照明系统的设计实例，包括LD阵列光源光束整形系统、方棒匀光系统、方棒中继系统的设计。结果显示方棒照明系统具有较高的光能利用率及较好的光斑均匀性。由此得出较高光能传递质量的新型激光投影显示系统中方棒照明系统的设计方法。

In non-imaging optics, based on the characteristics of the transition of optical extension, the size of elements and beam aperture angles in light pipe illumination optical path of a new type of laser projection display system with the laser diode (LD) array as the light source are given. As an example, the light pipe illumination system design using standard optical design software Zemax is described. The source is 3×8 red LD array. The spatial light modulator (SLM) is a 0.45 inch (1 inch=25.4 mm) liquid crystal on silicon (LCOS). The design includes laser source beam shaping, light pipe uniformity system and the light pipe relay lens. Good performances of energy efficiency and beam uniformity are gotten. Then, the method to design light pipe illumination system with high quality of energy transition in the laser projection display system is shown.