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Chromatic Aberrations near the Cutoff of Low-Beam Headlamps.
| 题名： | Chromatic Aberrations near the Cutoff of Low-Beam Headlamps. |
| 作者： | Sivak-M.; Flannagan-M.J.; Schoettle-B.; Adachi-G. |
| 关键词： | *Low-beamed-headlamps.;Headlamps-; Colorimetry-; Color-; High-intensity-lighting. |
| 摘要： | Projector type automobile headlamps have gained substantial popularity during the past few years. Some reasons for their popularity are the smaller size and better ability to create sharper vertical cutoffs. On the other hand, projector headlamps are subject to color aberrations near the cutoff. These aberrations are caused by dispersion of white light when passing through the lens (Vozenilek, Purma, and Stefka, 2000). The color changes are especially of concern with high-intensity discharge (HID) headlamps, because their color composition (even without color aberrations) is known to lead to more discomfort-glare complaints (Flannigan, Sivak, Battle, Sato, and Taube, 1993), and the aberrations are likely to exacerbate the problem. The purpose of this study was to evaluate the extent and magnitude of color aberrations in HID and tungsten-halogen projector low beams. Specifically, we made colorimetric measurements near the cutoffs of 8 projector HIDs and 4 projector tungsten-halogens. As a control, we also evaluated 9 nonprojector HIDs and 5 nonprojector tungsten-halogens. |
| 报告类型： | 科技报告 |
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