Method and system for measuring spatial light field of luminaire

A method for measuring the spatial light field of a luminaire, wherein illuminance distributions on illuminated surfaces within two or more local angular intervals in the far-field of a measured luminaire are measured and integrated to obtain full spatial light field information of the measured luminaire, wherein specific steps are as follows:

• S1:
• installing the measured luminaire on a rotatable table, wherein only a portion of light emitted by the measured luminaire illuminates a diffusing screen in the far-field space, while the remaining light is blocked by a stray light eliminating device;
• S2:
• aligning a first imaging measurement device with the diffusing screen to measure the illuminance distribution thereon, and aligning a second imaging measurement device with the measured luminaire to obtain a light-emitting surface image of the measured luminaire;
• S3:
• rotating the measured luminaire through the rotatable table to change the pose of the measured luminaire, and repeating step S2 for measurement in two or more poses;
• and
• S4:
• integrating the light-emitting surface images of the measured luminaire in different poses and the illuminance distributions on the diffusing screen to calculate a full spatial luminous intensity distribution of the measured luminaire.