Conference and Symposia Proceedings

CIE x019-2001 01-Jan-2001

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CIE x019-2001

Proceedings of three CIE Workshops on Criteria for Road Lighting

Commission Internationale de L'Eclairage / 01-Jan-2001 / 114 pages

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Printed Edition	English	€ 120.00 EUR	Usually Ships In 3 - 5 Days

Description

CIE Division 4 "Lighting and Signalling for Transport" organised in the last years three workshops in conjunction with different conferences. The first was the Symposium on "Road Lighting for Developing Countries" held on 3rd September 1997 in Durban, South Africa. The next was the Workshop on "Warrants for Road Lighting" on 24th October 1998 in Bath, Great Britain, and the last one was the Workshop on "Criteria for Road Lighting" organised on 24th June 1999 in Warsaw, Poland. These proceedings contain a selection, aiming only to avoid duplication, of the papers read at the workshops.

There is a certain relation among the three workshops; even a clear progression can be seen in the topics that were discussed. The topics developed from the general discussion of "Road Lighting for Developing Countries"; they became more specific on "Warrants for Road Lighting" and ended in the area of practical application as "Criteria for Road Lighting". The progression is from general to specific and from abstract to concrete. The developing countries were in all cases a major focal point.

Another aspect of progression is that in the past the question whether a road section needed road lighting, was considered as a matter for politicians to decide and CIE showed its involvement in road lighting only after such decisions were made. Even now it is still recognized that the decision "to light or not to light" is indeed a decision of policy makers but the lighting profession could give valuable contributions to the decision making process. This contribution might help to come to a better result where technical, humanitarian, ecological and economic factors all have their place.

The Proceedings contain the text of 17 papers read as well as a report on the discussions and general conclusions. The publication consists of 114 pages.

Conference and Symposia Proceedings 2010-08-10

CIE x018-1999 01-Jan-1999

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CIE x018-1999

Proceedings of the CIE Symposium '99 "75 years of CIE photometry"

Commission Internationale de L'Eclairage / 01-Jan-1999 / 195 pages ISBN: 9783900734961

Format	Language	Price	Avaliablity
CD-ROM	English	€ 84.00 EUR	Ships In 3 - 5 Days
Printed Edition	English	€ 162.00 EUR	Ships In 3 - 5 Days

Description

The 1999 Symposium of the CIE was held at the Hungarian Academy of Sciences, Budapest, between 30 September and 2 October 1999, celebrating the 75th anniversary of the CIE photometric system. Papers dealt with the present photometric system, and discussed its shortcomings and possible extensions.

The presented papers and discussions made it clear that the 75 year old photometric system is still the internationally accepted basis for all visually significant light measurements. It defines one of the base units of the SI system, the candela, and as such it should have a permanent status also in the future. Contributions pointed out, however, that since 1924 great progress has been achieved that found only partly its way into CIE recommendations and standards. By now it is clear that one has to differentiate between foveal vision photometry, to be used when it is important to see and recognise small details, and a photometry that can help illuminating engineers to describe parafoveal vision, brightness perception in the lit environment and mesopic vision.

The present volume contains the written version of the invited and research papers and short descriptions of the lighting calculation software shown during the demonstrations and workshops.

An introduction was presented by Dr. Hengstberger, at the time of starting the organization of the meeting Director of CIE Division 2 and now Vice President for Publications. Highlights of the meeting were: Professor Valberg, one of the leading scientists in vision research, described underlying vision research that makes the difference between flicker photometry based V(lambda) and opponent colour channel influenced brightness perception understandable. Dr. McGowan's paper discussed the application of photometry in lamp industry. Prof. Rea dealt with the applicability of V(lambda) based photometry for foveal recognition of tasks, also in the mesopic range, and possible extensions for parafoveal vision, where at mesopic levels a photometry based on a 10 degree observer with rod participation seems to be necessary. Photometry is important in interior design, this question and some of the necessary extensions of the present photometric system to cope with the requests interior designers have were dealt with by Prof. Loe. Papers by Dr. Blevin and Dr. Wallard explained the interaction between CIE and the Meter Convention and how new scientific results could find their way into the system of international units and measures. Dr. Walraven reported on the progress CIE TC 1-36 made to recommend a fundamental chromaticity diagram, and to provide data for the extension of the V(lambda) function into the infrared. Dr. Sagawa, Director of CIE Division 1 showed in his closing paper the vision of a future photometer, which is an image photometer, where you can switch among a number of evaluation functions, depending on the actual task to be checked.

Conference and Symposia Proceedings 2010-08-10

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