Beuret Marc, Twardowski Patrice, Fontaine Joël
Université de Strasbourg, INESS, ENSPS, Boulevard S. Brant, F −67412 Illkirch Cedex, France.
Opt Express. 2011 Sep 26;19(20):19688-701. doi: 10.1364/OE.19.019688.
The design and the analysis of an off-axis (50°) diffractive imaging optical system is presented in this paper. A 10°x15° field of view is considered. The optical system is composed of two diffractive optical elements. A static diffractive optical element having a frozen phase transfer function is used to perform a virtual point in the considered field of view. A dynamic diffractive optical element having an adapted calculated phase transfer function is used to compensate for aberrations of the static element. Using a sequential creation of virtual image points and considering human eye characteristics, it is shown that a nine points virtual image can be obtained with current technology. Moreover, it is presented that aberrations can be compensated whatever the position of the virtual point in the 10°x15° field of view. Finally, using rigorous coupled wave analysis, it is shown that an average diffraction efficiency of 79% can be reached across the considered field of view with a standard deviation of nearly 5%.
本文介绍了一种离轴（50°）衍射成像光学系统的设计与分析。考虑了10°×15°的视场。该光学系统由两个衍射光学元件组成。具有冻结相位传递函数的静态衍射光学元件用于在所考虑的视场中生成一个虚拟点。具有适配计算相位传递函数的动态衍射光学元件用于补偿静态元件的像差。通过依次创建虚拟像点并考虑人眼特性，结果表明利用当前技术可以获得九点虚拟像。此外，还表明无论虚拟点在10°×15°视场中的位置如何，像差都可以得到补偿。最后，通过严格耦合波分析表明，在所考虑的视场内平均衍射效率可达到79%，标准差接近5%。
