1968-02-01

Photometric Evaluation of Mechanical-Test Performance of Automotive Lighting Devices 680141

Test result determinations for automotive lighting devices subjected to laboratory mechanical tests (dust, moisture, and corrosion) are presently based either on subjective evaluations or on time-consuming photometric measurements. This paper deals with a simplified photometric method that provides a basis for objective and relatively rapid evaluations of mechanical test performance of lighting devices. The method basically involves the use of a light-integrating hemisphere to measure the total light output of a device before and after undergoing a mechanical test. The performance of the device is evaluated by comparing the “before” and “after” measurements and checking the results against allowable degradations set forth in the applicable Federal and SAE mechanical test specifications. Evaluation test results show that the photometric method, as it stands, is suitable for use with the laboratory dust test, but that it requires further study and development before it can be used with moisture or corrosion tests.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

U. S. Automotive Corrosion Trends: 1998 SAE (ACAP) Automotive Body Corrosion Survey Results

2003-01-1244

View Details

TECHNICAL PAPER

Causes and Effects of Sludge Formation in Motor Oils

340090

View Details

TECHNICAL PAPER

HOT-ENGINE SLUDGE and ITS CONTROL

450168

View Details

X