虚拟现实首次尝试使用了头盔式显示器（HMD）。
The first attempt at virtual reality used head-mounted displays (HMDs).
本文介绍了几种头盔式显示器的光学设计方案，并从提高系统的分辨率、对比度，重量等各方面作了比较。
Several optical design schemes of helmet display are introduced and compared in resolution, contrast and weihgt of system.
这两个系统都是步兵装备的网络位置感知系统，包括使用GPS数字地图显示技术的头盔佩戴式的显示器。
These are network-situational-awareness systems for dismounted units, complete with a helmet-mounted display screen that uses GPS digital-mapping-display technology, Fuller said.
针对实验室的光学透视式增强现实系统的组成特点，选定了虚拟摄像机(头盔显示器与人眼的结合)的标定算法。
Based on our system, this paper selects the calibration algorithm of the virtual camera which models the combination of HMD and user's eye.
针对实验室的光学透视式增强现实系统的组成特点，选定了虚拟摄像机(头盔显示器与人眼的结合)的标定算法。
Based on our system, this paper selects the calibration algorithm of the virtual camera which models the combination of HMD and user's eye.
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