Test Methods and Equipment for Lighting Devices for Use on Vehicles Less than 2032 mm in Overall Width J575_202104

DOI: https://doi.org/10.4271/J575_202104

Issuing Committee: Test Methods and Equipment Stds Committee

Publisher: SAE International

Pages: 24

Rationale: A study was done regarding the releavance of the lens impact test with plastic lenses. It was shown that more than 30 times the impact force of the glass lens impact test is required to crack a polycarbonate or impact resistant PMMA headlamp lens of typical thickness. In review ot the test history, it was determined that the required force was designed around the impact strength of a glass lens. The impact test will be split into two types of material: glass lenses and plastic lenses (4.3). For glass lenses, the historical impact force of 0.196 J is used, but for plastic lenses the impact force is increased to 10X that of a glass lens. The equivalent road velocity versus impact mass is shown in the curve below for the plastic lens test energy of 1.96 J. Section 4.3 renumbered to include plastic headlamp lens impact test. Section 4.11.8 numbering error corrected (4.10.7 ➔ 4.11.7).