Setting illumination (when the reflective chart is used) Equipment: Illuminance meter (Calibrated) 1. Turn on the light source and warm up for about 30 minutes. 2. Place the illuminance meter on the chart surface. Adjust the position and angle of the light source so that the whole surface of the chart is evenly 2000 lx. n Light the chart from almost the same direction and height as the camera to shoot the chart.
Chart
Illuminance meter
Light source
Setting luminous intensity (when the transparent chart is used) Equipment: Luminance meter (Minolta LS-110 or equivalent. Calibrated.) 1. Light the pattern box and warm up for about 30 minutes. 2. Place the pattern box where the chart is not exposed to light, such as a darkroom. (Or cover the pattern box with a cover whose inside is painted in black.) 3. Place the luminance meter facing straight to the chart at a distance of 1 m from it. 4. Adjust the luminance control of the pattern box so that the white portion in the center of the chart is 573 ±6 cd/m2. n This corresponds to the luminous intensity on the 89.9 %-reflective chart at 2000 lx.
Chart
