本文主要介绍背景照明光源的投射光学系统用的显示光源。
The article mainly presents the light sources of the backlighting and the display for projection optical systems.
从光学指标的确定，结构、材料的选取到最终光学性能，阐述了准直投射光学系统的设计。
The projection optics is designed for a constant field angle and entrance pupil. Thus image always fills entrance aperture and view field of the test optical system.
光学系统包括光学图像的形成和光学图像的投射两部分。
Optical systems are divided into two sections of production and projection of optical image?
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