激光投影显示技术是显示技术近年来的发展趋势, 本文设计了一种新的针对激光光源的照明系统, 它由激光器阵列作为光源、改进的卡塞格林汇聚系统、光纤导光棒、激光散射器及4f 中继系统组成。改进的卡塞格林汇聚系统收集激光器阵列发出的光能耦合进光纤, 激光在光纤中传输, 使光束混合均匀, 激光散射器对光束匀光及整形, 通过4f 中继系统照射在0.61 英寸(1 英寸=2.54 cm)LCOS 芯片上, 形成高效均匀的照明光束, 光纤可弯曲可合束能实现超高亮度照明。用光学扩展量评价了系统的光能利用率。最后通过软件模拟, 验证了方案的可行性。

In recent years, the laser display is the tendency of the display technology. A new kind of illumination system is proposed for laser light source, which consists of laser array light source, improved Cassegrain optical system, fiber, laser diffuser and 4f-relay system. In order to obtain efficient and uniform illumination distribution, the light from the laser is collected by the improved Cassegrain optical system and then coupled into the fiber where it’s been mixed and uniformed. Then the beam is collected on the 0.61-inch LCOS chip through the 4f-relay system after being shaped by the laser diffuser. The system could achieve high brightness illumination because the fiber can be bent and combined, and the optical extension is evaluated based on optical extend. Finally, the designed system is ray tracing simulated in optical software to verify the feasibility of the method.