Fig. 3.

A standard curve and measurements relating Iris values to irradiance. All plot markers represent the mean and standard deviation of a set of eight measurements. (A) A standard curve generated from a set of measurements across the programmable range of Iris values (triangular markers). Predicted Iris values for specific target irradiances were then programmed and the actual irradiance measured (circular markers). (B) Target irradiances for three different LPAs are shown (circular markers). The measurements between LPAs at the target irradiances all cluster closely and are within 3% of their respective targets.