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The location of the entrance pupil, field of view, and motion of the viewer's eye is frequently discussed for virtual reality/augmented reality (VR/AR) displays. In order to properly measure optical performance of these displays, the light measuring device (LMD) must simulate the characteristics of the human eye. An important factor to consider is the location of the entrance pupil (aperture stop setting) of the LMD. We compared field of view (FOV) and luminance deviations with various pupil entrance locations at the LMD in this paper. As a result of the experiment, the entrance pupil at the front focal point of the LMD was the best choice. [ABSTRACT FROM AUTHOR]

The conventional display measurements are no longer satisfying the need for eyewear displays. The measurement of VR/AR type display requires light measuring devices (LMDs) to simulate the characteristics of the human eye. Factors like the position of the pupil, field of view, and the motion of the eye are often discussed. One of the factors to be considered is the choice of entrance pupil location (aperture stop setting) of the LMD. In this paper, a preliminary study was carried out to compare the deviations of FOV and luminance with the choice of entrance pupil location. The experiment demonstrated that it exists as the most accurate eye‐viewing when the entrance pupil is located at the front focal point. [ABSTRACT FROM AUTHOR]

In virtual reality devices, positioning virtual information onto the real‐world scene accurately has always been a challenge. Such performance feature has been widely requiring high precision in vehicle HUD navigation, AR surgery, industrial production assembly and maintenance, and so on. For applications such as surgical use and assembly in the industry, positioning accuracy is essential to evaluate and measure. The accuracy of virtual image positioning depends on the imaging lens, the combiner optics, eye position, etc., and showing the individual parameters of each component is often not adequate to demonstrate the actual performance of the product. As such, the measurement that simulates the human eye under actual product use conditions is crucial for achieving accurate measurement. In this paper, we use a high‐angular resolution 2D imaging luminance meter that mimics the optics of the human eye, together with a two‐axis goniometer, to achieve precise measurement of positioning accuracy. This paper further analyzes the positioning accuracy based on the measurements around both the eye pupil center and eyeball rotation center. In addition, the effects of the applications of the positioning uncertainty were studied. [ABSTRACT FROM AUTHOR]

Augmented Reality (AR) has become a hot topic. It seems AR is finally becoming ready for the generals: Public securities have been using AR glasses to assist their public patrol activities, the museum offers the AR glasses to enhance the visitor experience, the oil evaporation workers wear AR headset to help their evaporation operation, etc. However, the one component that is probably most limiting today's popularization is the display's image quality. This paper addressed the image quality of see‐through real scene for AR glasses. Michelson contrast or namely luminance modulation, is measured to evaluate the quality of an see‐through optics. In this paper, we studied the Michelson contrast at different locations of the optics of AR displays. Two types of AR displays were selected for the evaluation and measurement. This paper discussed the two favorable AR type technologies: waveguide and combiner (prism‐combiner). [ABSTRACT FROM AUTHOR]

The augmented reality (AR) display is one of the arising display technologies. An AR display system creates an immersive aspect of the real environment by generating the virtual image with a micro‐display and fusing the external real‐time image into the same scene. Unlike traditional LCDs, the AR display has a very different image formation mechanism that allows its testing method to be different from conventional methods. This paper introduces some of the main issues related to the real‐scene fused with the virtual image under ambient conditions. [ABSTRACT FROM AUTHOR]