STEREO ACUITY AND VISUAL ACUITYIN HEAD MOUNTED DISPLAYS

摘要

We have determined how the stereo acuity and visual acuity with Helmet MountedDisplays (HMD’s) depend on the HMD’s spatial resolution. We measured stereoacuity and visual acuity on 6 subjects for three types of HMD, with display resolutionsranging from 0.18 to 0.50 pixel/arcmin. The HMD’s provide stereo acuity rangingfrom 1.1 to 2.7 arcmin-1, not far below our subjects’ unaided stereo acuity. The ratio ofstereo acuity to display resolution is 6.3 pixel-1 and independent of HMD type. TheHMD’s are therefore well suited for tasks that require stereo vision, even though theHMD visual acuities are rather low; the HMD with the highest resolution provides avisual acuity (0.55 arcmin-1) which is still four times lower than the unaided visualacuity. We attribute these excellent HMD stereo acuity scores to the target used whichis much more representative of real world scenes than the typical static ‘fine line’target often used in the scientific literature.