17.4: Comprehensive Survey on Viewing Angle Measurement Devices: A Theoretical Study

Abstract

Abstract Viewing angle properties are certainly among the most common characteristics measured on any type of displays and in particular on LCDs. Historically, goniometers have first been used for this task. In 1993 ELDIM has introduced Fourier optics instruments (conoscopes) that are now widely used by many display makers. More recently an imaging technique based on the use of a low reflectance hemisphere has been introduced. All these approaches have their inner advantages and drawbacks depending on the optical setup and the measurements constraints. We present a comparison of these three systems based on their theoretical specifications.