Free-form surface type binary optical element, designing method and manufacturing method thereof and free-form surface type binary optical projection system

Abstract

The invention discloses a free-form surface type binary optical element, a designing method and a manufacturing method thereof and a free-form surface type binary optical projection system. The designing method comprises the steps of forming an original file, wherein the original file comprises an original pattern; performing grid division on the original file to form an original file array plane; displaying a display pattern in a display area, performing grid division, which is the same as that of the original file, on the display area to form a display area array plane; performing grid division, which is the same as that of the original file, on a virtual plane to form a virtual array plane; adjusting the angle of a plane corresponding to a first color in the virtual array plane to enable the display pattern in the display area to correspond to the original pattern in the original file; and forming a free-form surface by using each angle-adjusted plane in the virtual array plane. 本发明公开了一种自由曲面型二元光学元件及其设计、制作方法及自由曲面型二元光学投影系统。本发明的设计方法包括以下步骤：形成一原始文件，该原始文件包含原始图案；将原始文件进行网格化分，形成原始文件阵列面；显示图案在一显示区域内显示，将显示区域进行与原始文件相同的网格化分，形成显示区域阵列面；将一虚拟面进行与原始文件相同的网格化分，形成虚拟阵列面；调整虚面阵列面中对应于第一颜色的平面的角度，使得显示区域的显示图案与原始文件中的原始图案对应；利用调整角度后的虚拟阵列面中的各个平面，形成自由曲面。