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The investigation of large Field of View Eyepiece with multiLayer Diffractive Optical Element

机译：多层衍射光学元件大视野目镜的研究

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摘要

In this paper, a light-small hybrid refractive/ diffractive eyepiece for HMD is designed, which introduces a multilayer Diffractive Optical Element for the first time. This eyepiece optical system has a 22mm eye relief and 8mm exit pupil with 60° FOV. The multilayer DOE overcomes the difficulties of single-layer DOE and double-layer DOE using in the optical system, and improve the image contrast and the performance significantly due to the diffraction efficiency of the multilayer DOE is lager than 90% in wide waveband and large FOV range. The material of multilayer DOE are FCD1 for first layer, FD6 for second layer, PS for the filler layer. Moreover, the weight of the eyepiece system is only 8g, and the diameter of lens is 16mm. The MTF performance can satisfy the requirement of display with VGA resolution. Besides, the lateral color and distortion are 4.8% and 10um, respectively. The properties of the helmet eyepiece system are excellent.
机译：本文设计了一种用于HMD的轻巧的混合折射/衍射目镜，首次引入了多层衍射光学元件。该目镜光学系统具有22毫米的眼睛浮雕和8毫米的出射光瞳，其FOV为60°。多层DOE克服了光学系统中单层DOE和双层DOE的使用困难，并且由于多层DOE在宽波段和大波长时的衍射效率大于90％，因此可以显着提高图像对比度和性能。 FOV范围。多层DOE的材料为：第一层为FCD1，第二层为FD6，填充层为PS。而且，目镜系统的重量仅为8g，镜片直径为16mm。 MTF性能可以满足VGA分辨率显示的要求。此外，横向颜色和畸变分别为4.8％和10um。头盔目镜系统的特性非常出色。

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