光学精密工程2011，Vol.19Issue(3)：508-514,7.DOI:10.3788/OPE.20111903.0508
折/衍混合自由曲面式头戴显示器光学系统设计
Design of optical system of HMD using hybrid refractive/diffractive and free-form surfaces
摘要
Abstract
To resolve the contradictions between wide Field of View(FOV),large exit pupil and compact,lightweight,a hybrid refractive/diffractive optical system using Free Form Surfaces(FFSs) for a Head Mount Display(HMD) was designed. The dispersion characteristics of diffractive elements were used to correct the chromatic aberration,and the appropriate types of FFS were selected to correct the off-axial aberrations(astigmatism, coma and distortion). Furthermore, the FFS prism was made of plastic materials to form an optical structure without rotational symmetry to achieve compact and easy to align functions. Obtained optical system can offer the eye relief of 17.4 mm,exit pupil of 4 mm and the FOV of 55°. Moreover,the RMS diameters of spot diagram are less than 30μm,the MTF are higher than 0.1 at the spatial frequency of 30 lp/mm across the entire visual field,and the maximum distortion is less than 10 ％. Experimental results indicate that the optical system has perfect performance and can meet the demands of eyepieces for aberration characteristics.关键词
头戴式显示器/虚拟现实/自由曲面/折/衍混合系统/光学设计Key words
Head-mounted Displays (HMDs) / Virtual reality / Free-form-Surface (FFS) / hybrid refractive/diffractive system / optical design分类
信息技术与安全科学引用本文复制引用
姜洋,孙强,谷立山,刘英,李淳,王健..折/衍混合自由曲面式头戴显示器光学系统设计[J].光学精密工程,2011,19(3):508-514,7.基金项目
国家863高技术研究发展计划资助项目(No.2007AA122110) （No.2007AA122110）
国家自然科学基金资助项目(No.60977001) （No.60977001）
