This SAE Recommended Practice is intended as a guide toward standard practice and is subject to change to keep pace with experience and technical advances. This document establishes additional performance requirements and provides test methods and requirements to evaluate the suitability of plastic material or materials intended for optical applications in motor vehicles. The tests are intended to determine physical and optical characteristics of the material or materials only. Performance expectations of finished assemblies, including plastic components, are to be based on tests for lighting devices, as specified in SAE Standards and Recommended Practices for motor vehicle lighting equipment.
This document is being updated for the 5-year document review. The changes made were to the include common wording for the scope of lighting committee documents and the last sentence of the scope has been removed. SAE J578 has been updated for the use of “Non-incandescent” sources and uses the language “The color of light emitted from the device shall fall within the following boundaries…”, therefore SAE J576 has been updated to harmonize language with SAE J578 allowing for light sources that emit light in a narrow spectrum and are not fully reliant on the color of the lens to filter a broad-spectrum light source. Use of the CIE 1931 standard colorimetric observer (2° observer) in optical measurements is now clearly specified and the haze for forward road illumination devices, excluding cornering lamps, shall not be greater than 7% after outdoor exposure.