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Title: Night driving filter for automobiles
Authors: Rao, P K
Dodd, D S
Singh, Virender
Issue Date: Sep-2002
Publisher: NISCAIR-CSIR, India
Abstract: The dazzle (excessive visible radiation) produced by the headlights of the oncoming vehicles, blinds the driver's eyes instantly, during night driving. The frequent dazzling not only makes the driving difficult but, it also impairs the vision. Therefore, it is essentially required to suppress the dazzle by means or an optical filter (Night driving filter ) The night driving filter absorbs the excessive radiations ┬áresulting in reducing the glare. The night driving filter consists or a vacuum deposited gradient density, neutral film, having a required thickness gradation prolilc on a glass substrate. Online testing of filter was done, by fitting it in the car and driving on lighted and un-lighted roads. single and dual carriage-ways. The results are encouraging as shown in Table 1. The results show that the right hand portion of the filter (seen in the direction or view or the driver), blocks the glare and reduces it to about 25- 30 % , at the same time view of the road from the center as well as from left hand portion of the filter, is not reduced, resulting in stress-free comfortable driving and better overall visualization.
Page(s): 611-614
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.40(09) [September 2002]

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