Browse Publications Technical Papers 980323
1998-02-23

Photometric and Optical Methods of Lamp Analysis 980323

Perhaps the most significant factor impacting the accuracy of software for the design of automobile illumination optics is the proper characterization of the light source. Techniques used in the past have employed a simplified geometry to model the emitting element of the lamp along with an intensity distribution which had been measured at some fixed distance. This produced major inaccuracies in the prediction of the optical performance of complicated systems.
The authors have been active for several years in developing improved techniques for lamp characterization. It is the intent of this paper to describe the aspects of lamp modeling which we have found to be important. These factors include the use of “far-field” and “near-field” photometry, the spatial variation of luminance over the lamp, and re-emission of radiation incident on the lamp.
The most difficult light sources to model accurately are high intensity discharge sources. Methods will be discussed for the solid modeling of such light sources by the use of luminance and intensity data. Instrumentation for the collection of these data is desired.

SAE MOBILUS

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

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 17% 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

A Numerical Methodology to Compute Temperatures of a Rotating Cardan Shaft

2013-01-0843

View Details

TECHNICAL PAPER

A Numerical Methodology to Compute Temperatures of a Rotating Cardan Shaft

2013-01-0843

View Details

TECHNICAL PAPER

Light Distribution Editor (LDE) Virtual Light World in HELIOS

970907

View Details

X