An instrument to monitor the luminance of pattern visual evoked potential stimuli

Abstract

When recording pattern visual evoked potentials it is important that the overall luminance of the pattern and the relative luminance of the pattern elements (for example checks or bars) are maintained at a constant level. This paper describes a low-cost battery-powered instrument designed and constructed to measure the luminance of specific areas of the screen on which the pattern is projected.

Key Words:

• Luminance
• Calibration
• Vep