Quality control of AR/VR near-eye displays: goniometric vs. advanced 2D imaging light measurements

Light measurement devices (LMD) are essential tools for developing novel display technologies as well as for quality assurance in display mass production. More complex displays, e.g. near-eye displays (NEDs), might require various LMDs in different development and production phases. Here we demonstrate the benefit and seamless use of complementary measurement principles and LMDs due to an absolute and traceable calibration concept. Goniometric display analysis with full angular and spectral resolution complements with spectrally enhanced, fast 2D imaging measurements covering a wide range of display test applications from research and development to production. Experimental data from these measurement principles are compared, emphasizing luminance and chromaticity measurements, based on LCD and OLED displays of Virtual Reality (VR) headsets. A standard light source acts as a reference for these measurements. Absolute and traceable calibration is discussed with respect to accuracy and complementary characterization of the displays under test (DUT).