邀请函Invitation2022.2.pdf | 3.13MB | Download |
Spectral Ray Tracing From Near Field Goniophotometer MeasurementsRadiantZemax,KXOptoelectronics ABSTRACT Measuredlightsourcemodelshavebeenwidelyusedinraytracesimulationsforopticaldesignformorethan15yearsnow, but to date the generated ray sets have not contained spectralinformation. In some limitedcases,tristimulusmeasurements can be helpful, but most ray tracing software requires a specificwavelength assignedtoeachraytoenablefullcolorsimulationsofanopticalsystem. Thispaper describes and tests various techniques for combining spectralmeasurements with either photopicortristimulusimagingcolorimeterstoproduceraysetsthatcontainawavelength.Theseraysetscangenerallybereadilyusedbymostray-tracingsoftwaretomoreaccuratelyrefractanddiffractraysthroughtheopticalsystemandtogenerateilluminanceorluminancedistributionsthatalsoincludecolorimetricinformation. Finallythemethodsaretestedwithreallightsourceswherespectralpowerdistributionvariessignificantlyspatiallyacrossthelightsourceand/orasafunctionofangle. Keywords: (nearfield, goniophotometry, spectral measurement, white LED, source model, sourceimaginggoniometer) |