Absolute radiometric and photometric measurements of near-eye displays

Abstract

-The arrival of near-eye displays has challenged the traditional methods that have been used to measure the optical properties of displays. Near-eye displays typically create virtual images and are designed for the relatively small entrance pupil of the human eye. These two attributes result in optical measurement requirements that are substantially different from traditional flat panel displays. This paper discusses the optical system requirements needed to make absolute radiometric and photometric measurements of near-eye displays. These guidelines are contrasted with the performance of current optical measurement instruments. An initial study was conducted using traditional and modified instruments and exhibited a significant variance in the results with different near-eye display designs. The study demonstrated that some traditional optical instruments can yield erroneous results when used to measure near-eye displays. Generic optical system design concepts were used to interpret the experimental results and helped to identify how current commercial designs could be modified to properly measure near-eye displays.

Qualified viewing space determination of near‐eye and head‐up displays

“…Head‐up and near‐eye display (HUD and NED, respectively) manufacturers rely on luminance, color, and uniformity measurements as essential performance evaluation criteria in the augmented reality and virtual reality display visual field of view (FOV). Recent work has been performed that defines a minimum essential set of measurement instrument optical system characteristics to assure repeatable and reproducible photometric and colorimetric measurement results . Building upon these findings, we give a method of defining the boundaries of the qualified viewing space (QVS) based on a display quality performance parameter.…”

31‐2: Measuring Interocular Geometric Distortion of Near‐Eye Displays

“…Previous research on NED metrology pointed out the need for the optical measurement equipment to simulate the optical configuration of the human eye [2]. This included limiting the entrance pupil size of the optical system to that of the eye, which is typically 2-5 mm in diameter.…”

Novel method for the fast measurement of the three‐dimensional range of the eyebox of a VR device

“…Various definitions and measurement methods have been reported for the eyebox. [7][8][9][10][11][12][13][14][15][16][17] One example definitions 17 states that it is a "threedimensional space within which users place their eye so as to be able to properly see the entire virtual image without moving the head or making any other adjustment. "…”