5 November 2014 The investigation of large field of view eyepiece with multilayer diffractive optical element
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Abstract
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 10μm, respectively. The properties of the helmet eyepiece system are excellent.
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Changjiang Fan, Changjiang Fan, } "The investigation of large field of view eyepiece with multilayer diffractive optical element", Proc. SPIE 9272, Optical Design and Testing VI, 92720N (5 November 2014); doi: 10.1117/12.2067748; https://doi.org/10.1117/12.2067748
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