A diffuser-based three-dimensional measurement of polarization-dependent scattering characteristics of optical films for 3D-display applications

Abstract

We propose an accurate and easy-to-use three-dimensional measurement method using a diffuser plate to analyze the scattering characteristics of optical films. The far-field radiation pattern of light scattered by the optical film is obtained from the illuminance pattern created on the diffuser plate by the light. A mathematical model and calibration methods were described, and the results were compared with those obtained by a direct measurement using a luminance meter. The new method gave very precise three-dimensional polarization-dependent scattering characteristics of scattering polarizer films, and it can play an effective role in developing high performance polarization-selective screens for 3D display applications.

Camera-based ARS system for complete light scattering determination/characterization

“…As both screens are commercially available and intended for general purpose usage, such as rear projection, no polarization effects due to the screens were expected or observed in our system. By putting a polarization filter after the light source or the sample, one is also able to measure the scattered polarized light with the camera-based system [15].…”

“…However, a reflective screen was used instead of a transmissive one in order to gain in the signal. A similar approach (but without a lens) was used for the characterization of optical films for 3D displays [15]. Foldyna et al [16] reported on a system for spatial measurements of reflected light in a broad range with a very complex conoscopy configuration.…”