Light & Engineering Vol. 23, No. 4, pp. 75-80, 2015 Svetotekhnika No. 5, 2015, pp. 23-27 NEXT GENERATION GONIOPHOTOMETRY Jьrgen P. WeiЯhaar Opsira GmbH, Weingarten, Germany E-mail: weisshaar@opsira.de ABSTRACT In these times of steadily reduced product life times and a rapidly changing choice of available light source it is mandatory to be able to measure the photometric and colorimetric properties of sources and luminaires in an effective, quick and precise way. <...> Modern approaches in computer aided optics design of luminaires demand high-grade measurement data of the sources very early in the development process to support a design of the lighting systems that’s effi cient and close to reality. <...> Manufacturers of sources as well as luminaire makers and vendors need to obtain these information quickly, easily and effi ciently. <...> The new approach described in this paper, the next generation goniophotometry, combines the advantages of various conventional goniophotometer methods, comprising much more fl exibility, multiple functions and a top of the line precision in only one single device. <...> Keywords: goniophotometer, light source, luminaire, robogonio, CA – computer aided, DUT – device under test, LID – luminous intensity distribution, CHMSL – central high mounted stop lamp 1. <...> They have been used for photometric measurements of sources or lumiaires for almost 100 years now. <...> At the beginning, but also until today, the basic approach with a goniophotometer is the measurement of the angular dependant luminous intensity 75 distribution (LID) of the device under test (DUT), e.g. a luminaire. <...> The detector is a simple photometer measuring in the far fi eld of the DUT. <...> Forced by the development of steadily more complex as well as more compact lighting systems, but also driven by the use of high performance optics design software packages running on powerful computers, the goniophotometer applications diversifi ed. This paper introduces a worldwide new technology of using one single device to derive the data of the sources as a seed for the optics design process as well as to perform all the necessary measurements on the resulting products (luminaires, head lamps, signal lamps, etc.) to obtain the well known luminous intensity distribution and much more. <...> One of the various <...>