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