LCoS光引擎成像测试实验方法及结果分析

Experimental Method and Result Analysis for Imaging Test of LCoS Light Engine

光引擎是硅基液晶(LCoS)投影显示系统的核心部件。为了掌握LCoS光引擎各组件的实际工作情况,了解实际装配过程中的误差对成像质量的影响,以被广泛使用的三片式ColorQuadTM结构LCoS光引擎为例,介绍了一种通过在光学平台上搭建系统光路来进行LCoS光引擎成像测试的实验方法。先进行光源模组、分光合光、投影成像这三部分光学系统的搭建,然后根据具体成像,分析各器件的工作情况,相应地调整和修改光路,使系统呈现优质的图像,最后总结了测试实验结果中出现的投影画面亮度分布不均匀、对比度不高以及画面出现重影等问题,并针对这些问题做出了详细的分析。

Light engine is the core component of LCoS projection system.In order to master the actual work situation of LCoS light engine,and understand the influence of the image quality by practical assemble error,three-chip LCoS light engine of ColorQuadTM structure is chosen as an example,and a method for test image made by LCoS light engine using an optical path system based on optical experimental flatform is introduced.First,the three parts of optical system（the light source module,distribution and composition of light and projec tion imaging） are built,the result of the experiment is analyzed.Second,in order to make the system has the high quality images,the light road is adjusted and modified by analysis of specific imaging according to the work of each device.Finally,the problems such as uneven brightness distribution,low contrast ratio and double images in the test experiment are summarised and analyzed in detail.