Discomfort and Disability Glare from Halogen and HID Headlamp Systems Transportation Lighting Group, Lighting Research Center, Rensselaer Polytechnic Institute

Format:

Conference/Event

Author/Creator:

Bullough, John D., author.

Conference Name:

SAE 2002 World Congress & Exhibition (2002-03-04 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2002

Summary:

Illumination from high intensity discharge (HID) headlamps differs from halogen headlamp illumination in two important ways: HID headlamps have higher overall light output and a spectral power distribution that differs from halogen headlamps. These differences have been hypothesized to result in superior visibility with HID headlamps and most particularly in the periphery. These same factors, though, have also been conjectured to result in increased glare for drivers facing HID headlamps in oncoming driving situations. The present paper outlines a series of experimental investigations using halogen, HID, and blue-filtered halogen illumination to measure their relative impact on discomfort glare and disability glare under conditions matching those that might be experienced by oncoming drivers at night. Discomfort glare is determined using the scale devised by de Boer; disability glare is determined by measuring subjects' contrast sensitivity under different lighting conditions. The results are compared with predictions of existing glare models and with research on the possible role of rod photoreceptors or short-wavelength cones in glare-related responses

Notes:

Vendor supplied data

Publisher Number:

2002-01-0010

Access Restriction:

Restricted for use by site license