toggle visibility Search & Display Options

Select All    Deselect All
 |   | 
Details
   print
  Records Links
Author (up) Bará, S. url  doi
openurl 
  Title Black-body luminance and magnitudes per square arcsecond in the Johnson-Cousins BVR photometric bands Type Journal Article
  Year 2019 Publication Photonics Letters of Poland Abbreviated Journal Photon. Lett. Pl.  
  Volume 11 Issue 3 Pages 63  
  Keywords Skyglow; night sky brightness; luminance; photometric  
  Abstract A relevant amount of light pollution studies deal with the unwanted visual effects of artificial light at night, including the anthropogenic luminance of the sky that hinders the observation of the celestial bodies which are a main target of ground-based astrophysical research, and a key asset of the intangible heritage of humankind. Most quantitative measurements and numerical models, however, evaluate the anthropogenic sky radiance in any of the standard Johnson-Cousins UBVRI photometric bands, generally in the V one. Since the Johnson-Cousins V band is not identical with the visual CIE V-lambda used to assess luminance, the conversion between these two photometric systems turns out to be spectrum-dependent. Given its interest for practical applications, in this Letter we provide the framework to perform this conversion and the transformation constants for black-body spectra of different absolute temperatures.  
  Address Dept. Física Aplicada, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia  
  Corporate Author Thesis  
  Publisher Photonics Society of Poland Place of Publication Editor  
  Language English Summary Language English Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2080-2242 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 2685  
Permanent link to this record
 

 
Author (up) Fryc, I.; Tabaka, P. url  doi
openurl 
  Title Outdoor Areas Lighting with LEDs – the Competition Between Scotopic Efficacy and Light Pollution Type Journal Article
  Year 2019 Publication Photonics Letters of Poland Abbreviated Journal Photon.Lett.PL  
  Volume 11 Issue 3 Pages 75  
  Keywords Skyglow  
  Abstract In this paper the effect of spectral power distribution SPD

of typical outdoor LED lamps on star visibility index SVI was analyzed.

For those lamps the nearest color temperature CCT [K] and scotopic

efficacy lm/W] data are also provided. The SVI has been defined as a

ratio of its scotopic flux to scotopic flux created by full moon light. The

calculations show that there is a strong relation between CCT of LEDs

and SVI index. Low CCT of the lamps does not significantly affect their

SVI value. Unfortunately, those kind of lamps are less attractive in

applications because of their low .
 
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2080-2242 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 2692  
Permanent link to this record
 

 
Author (up) Jakubowski, P. url  doi
openurl 
  Title Artificial light sources as light pollutant of humans melatonin suppression Type Journal Article
  Year 2019 Publication Photonics Letters of Poland Abbreviated Journal Photon.Lett.PL  
  Volume 11 Issue 3 Pages 78  
  Keywords Human Health  
  Abstract Blue light emitted by LEDs might influence thenatural biological rhythm of a human being, whichcan beconsidered as environment pollution.In this paper the effect of the latest commercially available LEDs on melatonin suppression index (MSI) was analyzed. The research was based on spectral power distributionof a given LED(SPD) and melatonin suppression functionin reference to melatonin suppression under daylight (illuminant D65). The resultsof calculations show astrong correlation between CCT and MSI;however,MSI factor might vary for different LEDs with the same CCT.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2080-2242 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 2693  
Permanent link to this record
 

 
Author (up) Kowalska, J. url  doi
openurl 
  Title Coloured light pollution in the urban environment Type Journal Article
  Year 2019 Publication Photonics Letters of Poland Abbreviated Journal  
  Volume 11 Issue 4 Pages 93-95  
  Keywords Lighting  
  Abstract The article deals with issues related to colored lighting occurring in urban space. On the example of the Colosseum Amphitheatre 3D model, applications of colorful illumination were shown and the rationale for using color in individual cases was discussed. The aim of the article is to draw attention to proper planning and modernization of lighting to limit the negative interference of light in the ecosystem.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ intern @ Serial 2969  
Permanent link to this record
 

 
Author (up) Ściężor, T. url  doi
openurl 
  Title Overnight measurements of the sky brightness as a method for assessing the cloudiness Type Journal Article
  Year 2019 Publication Photonics Letters of Poland Abbreviated Journal Photon.Lett.PL  
  Volume 11 Issue 3 Pages 72  
  Keywords Skyglow; Remote Sensing  
  Abstract Determining the state of cloudiness at night is always a problem, especially at low levels of light pollution. This paper presents an innovative method of assessing the cloudiness of the night sky solely on the basis of all-night measurements of the brightness of the sky using generally available SQM meters. Using the numerical method of calculating the discrete derivative of overnight brightness of the night sky from time it is possible not only to distinguish a cloudless sky from a cloudy one, but even to distinguish high level clouds from medium or low.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2080-2242 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 2689  
Permanent link to this record
Select All    Deselect All
 |   | 
Details
   print

Save Citations:
Export Records: