Optical characterization and ergonomical factors of near‐to‐eye displays
Toni Järvenpää, Monika Pölönen · Journal of the Society for Information Display · 2010
Abstract— Near‐to‐eye displays (NEDs) have unique optical properties requiring different characterization techniques compared to direct‐view display measurements. Here, a new version of a NED measurement system is introduced, and optical measurements of five commercially available consumer NED products are discussed. Luminance, focal distance, qualified viewing space, angular properties, and interocular differences are among the values. In addition, these results are compared to extensive subjective studies. The main intention is not to benchmark between the different products, but to show that display measurements are important for NEDs. According to the results, the determination of NED's characteristics helps to predict the subjective experiences, but the nature of the relation between subjective and objective findings is rather complex and depends on several NED‐, user‐, and task‐related features. Measured characteristics indicate that with a conventional biocular NED system approach of using two microdisplays and their enlarging optics, it is a design and a manufacturing challenge to build an ergonomically satisfactory NED device that fits everyone.