This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Variable Curvature Headlamp Reflector Parametric Analysis
Annotation ability available
Sector:
Language:
English
Abstract
Homofocal reflectors are an approach to improving headlamp performance by creating sectionalized reflector surfaces that distribute light rays in desired directions. As the sections become infinitely small, these reflectors may approach continuous, variable radius of curvature (VRC) surfaces. Using new reflector design software and the FiELD (Tm) photometric analysis program, a range of variable curvature reflector surfaces have been evaluated. Aperture and filament position effects on photometric performance with a 9004 halogen bulb are described and the ability of this type of reflector to satisfy Federal automotive roadway illumination requirements with non-optically active covers is discussed.
Recommended Content
Technical Paper | Multi B-Spline Surface Reflector Optimized with Neural Network |
Technical Paper | Faceted Reflector Fog Lamp Eliminates Lens Fluting |
Technical Paper | Headlamp Developments with DMC Reflectors Including Homofocal Arrangements |
Authors
Citation
Erickson, G., Allen, P., and Tuck, R., "Variable Curvature Headlamp Reflector Parametric Analysis," SAE Technical Paper 910820, 1991, https://doi.org/10.4271/910820.Also In
Vehicle Lighting Design for Optimal Visibility and Performance
Number: SP-0857; Published: 1991-02-01
Number: SP-0857; Published: 1991-02-01
References
- Fujita Takeshige Ichihara Takaeo Tanaka Tomio Yamamoto Tsutomu “Development of 2-Lamp System Headlamp Using Halogen Bulb with C-8/C-8 Filament Structure and Multi-Focus Reflector” SAE Technical Paper # 880274 SAE International Congress and Exposition Detroit, MI February 29 March 4 1988
- Neumann, Rainer “High Efficiency Headlamp Systems with Variable Focus” SAE Technical Paper # 890687 SAE International Congress and Exposition Detroit, MI February 27 March 3 1989
- Neumann, Rainer “Improved Low Beam by Use of Segmented Headlamp Systems” SAE Technical Paper # 870063 SAE International Congress and Exposition Detroit, MI February 23-27 1987
- Kaneko, Akira Nino, Naohi “New Optical System for Low Profile Headlamps” SAE Technical Paper # 890690 SAE International Congress and Exposition Detroit, MI February 27 March 3 1989
- Schumacher, Thomas W. Fratty, Hector Dorleans, Guy “Improvements in Low Beam Lighting Achieved by Complex Surface Reflectors” SAE Technical Paper # 870059 SAE International Congress and Exposition Detroit, MI February 23-27 1987
- Spencer, Charles W. Manunta, Giorgio “High Performance Low Profile Headlamps” SAE Technical Paper # 870060 SAE International Congress and Exposition Detroit, MI February 23-27 1987
- Ernst Hans-Otto Rohling Wilhelm “Vehicle Headlight” April 16 1985