This SAE Recommended Practice is intended to provide guidelines for the identification of subjects used in dynamic tests. It establishes recommendations for location and description of target areas on test subjects or test devices, as well as recommendations for photographic calibration and timing.
SAE J138-1969 history
2019SAE J138-2019 Performance Requirements for Motor Vehicle Headlamps
1969SAE J138-1969 Film Analysis Guides for Dynamic Studies of Test Subjects