WP690E-Circ Imaging Circadiometer – Light Evaluations for Human Vision Science WP690E-Circ alllows users to acquire precise scotopic, ipRGC, S-cone, L-cone and M-cone, radiance measurements of displays, luminaires, or other visual scenes. Photometrica software provides the tools to analyze single or many measurement images to gain understanding of the impacts to human physiological responses. The WP690ES-Circ includes a … Continue reading Imaging circradiometer