SAE J2310-2024 PDF

Full title and description

SAE J2310-2024 — Road Vehicles — Test Method for Measuring the Spectral and Total Photometric Characteristics of Headlamps and Forward Illumination Devices Using Goniophotometric Measurements. This SAE Recommended Practice defines procedures and measurement conditions for using goniophotometers and associated equipment to determine spectral and photometric properties of vehicle headlamps and forward lighting devices, including methods to derive total luminous flux, luminous intensity distributions, colorimetric data, and spectral power distributions under specified operating conditions.

Abstract

SAE J2310-2024 provides standardized test methods for characterizing the spectral and photometric behavior of automotive headlamps and forward lighting devices via goniophotometric measurement. The document specifies instrumentation, measurement geometry, calibration, environmental and electrical conditions, data reduction, and reporting formats. It supports consistency and repeatability across laboratories and manufacturers for assessing luminous flux, intensity patterns, correlated color temperature, color rendering metrics, and spectral power distribution for compliance evaluation, design validation, and comparative performance studies.

General information

• Status: Published, recommended practice (current as of 2024)
• Publication date: 2024
• Publisher: SAE International
• ICS / categories: 43.040 (Road vehicles engineering); 17.140 (Optics and photonics)
• Edition / version: 2024 edition
• Number of pages: Typically 20–40 pages (official document page count varies)

Scope

This recommended practice establishes standard procedures for goniophotometric measurement of headlamps and forward illumination devices used on road vehicles. It covers instrument specification and calibration, measurement geometries and angular resolution, electrical and thermal stabilization of light sources, ambient and stray-light control, spectral measurement requirements, data processing to compute luminous flux and intensity distributions, and the format for reporting results. It is intended for laboratory evaluation of device performance, R&D characterization, regulatory support, and supplier quality control. It does not replace vehicle-level photometric compliance tests specified by regulatory bodies but provides laboratory measurement methods that support those activities.

Key topics and requirements

• Definitions and terminology for goniophotometric measurements, spectral quantities, and photometric parameters.
• Instrumentation requirements: goniophotometer types, photometers, spectroradiometers, detectors, and calibration standards.
• Measurement geometry and angular resolution for capturing intensity distributions and total flux.
• Environmental and electrical conditioning: stabilized supply, thermal equilibration, and ambient control.
• Calibration and verification procedures using traceable luminous and spectral standards.
• Procedures for measuring spectral power distribution, correlated color temperature (CCT), and color rendering indices.
• Data reduction, uncertainty analysis, and methods to compute total luminous flux and luminous intensity distribution.
• Reporting requirements: measurement conditions, uncertainties, raw and processed data formats, and pass/fail indications where applicable.

Typical use and users

Primary users include automotive lighting engineers, headlamp manufacturers, component suppliers, independent test laboratories, and vehicle OEM validation teams. Typical uses are product development and optimization, supplier quality control, comparative performance testing, laboratory support for regulatory submissions, and research into advanced lighting technologies such as LED, laser, and adaptive lighting systems.

Related standards

Standards and documents often referenced alongside SAE J2310 include international and regional photometric and automotive lighting standards such as CIE technical reports on photometry and colorimetry, ISO and IEC standards for spectroradiometers and integrating spheres, and vehicle lighting regulations and test procedures published by UNECE, SAE (other J-series documents), and regional authorities that define on-vehicle photometric compliance tests.

Keywords

goniophotometer, headlamp, forward lighting, photometry, spectroradiometer, luminous flux, luminous intensity distribution, spectral power distribution, colorimetry, correlated color temperature, calibration, measurement uncertainty

FAQ

Q: What is this standard?

A: SAE J2310-2024 is a recommended practice that specifies goniophotometric test methods for measuring the spectral and photometric characteristics of road vehicle headlamps and forward illumination devices in laboratory conditions.

Q: What does it cover?

A: It covers instrumentation and calibration, measurement geometry and procedures, spectral and photometric measurement techniques, data reduction and uncertainty analysis, and reporting formats for luminous flux, intensity distributions, and colorimetric data.

Q: Who typically uses it?

A: Automotive lighting designers, component suppliers, OEM test and validation teams, and independent laboratories use it for design verification, quality control, and laboratory characterization supporting regulatory compliance.

Q: Is it current or superseded?

A: The document is presented as the 2024 edition and considered current as published in 2024. Users should confirm the latest status with SAE International for any amendments or revisions.

Q: Is it part of a series?

A: Yes. SAE J2310 sits within SAE’s body of lighting and photometry documents and is typically used alongside other SAE lighting standards and relevant international photometry and colorimetry standards.

Q: What are the key keywords?

A: Key keywords include goniophotometer, headlamp, photometry, spectral power distribution, luminous flux, intensity distribution, colorimetry, calibration, and measurement uncertainty.