Luminance Measurement, Contrast Sensitivity, Homogeneity: New Approaches of Defining the Quality of Headlamps

Michael Hamm; Martin Lampen

doi:10.4271/980324

1998-02-23

Luminance Measurement, Contrast Sensitivity, Homogeneity: New Approaches of Defining the Quality of Headlamps 980324

The conventional measurements to describe the photometric quality of headlamps usually only comprise the luminous flux and the illuminance (resp. the luminous intensity) in several measuring points given by Type Approval Legislation. Practically, these photometric measurements do not describe the visual impression of a headlamp light distribution sufficiently, neither in lab nor in real street geometry.

With the clear outer lens headlamps introduced recently, filament images are projected directly onto the screens or streets, thus giving new impulses to research. Starting from the established photometric practice, other types of measurements and physiological fundamentals will be discussed. The basic tools to make physical measurement and physiological impression comparable, e.g. in terms of homogeneity, are shown.

SAE MOBILUS

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

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

Luminance Measurement, Contrast Sensitivity, Homogeneity: New Approaches of Defining the Quality of Headlamps 980324

SAE MOBILUS