Characterization and use of a digital light projector for vision research

For creating stimuli in the laboratory, digital light projection (DLP) tech nology has the potential to overcome the low output luminance, lack of pixe l independence, and limited chromaticity gamut of the cathode ray tube (CRT ). We built a DLP-based stimulator for projecting patterns on the in vitro primate retina. The DLP produces high light levels and has good contrast. S patial performance was similar to that of a CRT. Temporal performance was l imited by the refresh rate (63 Hz). The chromatic gamut was modestly larger than that of a CRT although the primary spectra varied to a small degree w ith light output and numerical aperture. (C) 2001 Elsevier Science Ltd. All rights reserved.