Performance Requirements for Motor Vehicle Headlamps
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 performance requirements for headlamps.
Revisions to this document were made to improve the readability and to revise the photometric tables format. In addition, the replaceable bulb wording was removed/revised to apply to other types of motor vehicle headlamp systems. Specific changes are detailed below:
Title of document changed to remove replaceable bulb restriction for this document.
Table of Contents changed to remove “replaceable bulb” on Figures 1, 3, and 4. Figure titles also changed. Table of Contents updated to mirror changes in the document.
Revised section 3 to remove definitions duplicated from SAE J387 and added definitions for Integral Beam Headlamp, Combination Headlamp, Replaceable Bulb Headlamp, and Replaceable Light Source Headlamp. Revised Replaceable Light Source definition. Removed H-V axis definition.
Updated section 4 to include markings for Integral Beam Headlamps and Combination Headlamps. Changed title of 4.5 to Optical Axis Marking for a more accurate description of this section.
Revised Section 5 to more closely match SAE J575. Also, removed duplicate wording from SAE J575 and just referred to SAE J575 when appropriate.
Revised Section 6 to match Section 5 renumbering. Also, removed duplicate wording from SAE J575 and just referred to SAE J575 when appropriate.
Revised the 10U-60U measuring procedure to ensure that the test is repeatable and accurate. Width of scans revised to ±20 degrees to reflect only the important area for veiling glare. Graphics changes as required to reflect the zone.
Added similar requirements for two zones defining 0U-10U as previously there were no requirements/restrictions for this zone. “Zone 2” created to define requirements for the left side of the beam pattern and “Zone 3” created to define the requirements for the right side of the beam pattern.
Moved Figures into the body of the text and deleted photo Tables as they are incorporated into the figures. Figures renumbered as appropriate. Figures duplicated in SAE J575 removed.
Added text describing the photometric charts and added some chart footnotes into the document text.
Modified Scope to match actual contents of document by removing the words “material requirements, design requirements, and design guidelines.”
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