異形前照灯の近距離測光について

概要

論文の詳細を見る
In principle, luminous intensity test of automobile headlamp should be made in full distance based on "inverse square law".Automobile inspection stations or maintenance shops which do not have sufficient places have widely adoped short distance test method using screen-type tester or condenser-type one. This method must be practical, but in this case some kinds of headlamps show law accuracy data.This report shows the results of short distance tests of unconventional headlamps such as square type or oval type.The results are summarised as follows.1.Some kinds of unconventional headlamps tested by condenser-type tester indicated low intensity value in comparison with the standard measurement at 10 meter distance, and especially luminous flux axis of headlamp was inclined from normal position.2.Unconventional headlamps tested by screen-type tester showed better data in comparison with condenser-type one.From these results, it may be concluded that the screen-type headlight tester used at 3 meter distance is most suitable for short distance test of automobile headlamps including unconventional ones.
独立行政法人海上技術安全研究所の論文
1969-03-31