On-car stray-light testing cart

A stray-light testing apparatus comprising:

• an optical assembly comprising a spatially extended light source and one or more optical elements arranged to direct light from the spatially extended light source along an optical path;
• a moveable frame supporting the optical assembly, the moveable frame comprising one or more adjustable alignment features for guiding positioning of the stray-light testing apparatus relative to an onboard camera on a vehicle, wherein positioning of the stray-light testing apparatus relative to the onboard camera using the adjustable alignment feature positions includes positioning the optical path of the optical assembly within a field of view of the onboard camera;
• and
• a shrouding mechanism attached to the frame and positioned on the frame such that, when the stray-light testing apparatus is aligned relative to the onboard camera on the vehicle and the optical path of the optical assembly is within the field of view of the onboard camera, ambient light exposure for the onboard camera is below a threshold.