Diffusing glass panes are used in non-residential buildings for their uniform distribution of transmitted solar radiation and for privacy reason. To quantify their ability to destroy or maintain coherence in the image of an object, when this object is viewed through them, the view-through index was defined (REVIS project), starting from gonio-photometric measurement of the bidirectional transmission/ reflection distribution function (BTDF). The paper describes an innovative method, based on the analysis of images collected by a CCD detector or scanner and successive mathematical evaluation. This approach does not require complex measurement and expensive instrumentation and can give a good evaluation of the glass performance if the geometrical measurement conditions are correctly selected, considering the actual conditions of vision and perception. In this first work the mathematical and experimental basis of the measurement principle are described
Characterization of translucent glazing units for the design and evaluation of indoor lighting / Zinzi, M; Iacomussi, Paola; Rossi, Giuseppe; N., Bo; G., Scialpi. - (2009), pp. CD-ROM. (Intervento presentato al convegno Intl. Conference Glass Processing, tenutosi a Tampere nel 12-15 giugno 2009).
Characterization of translucent glazing units for the design and evaluation of indoor lighting
IACOMUSSI, PAOLA;ROSSI, GIUSEPPE;
2009
Abstract
Diffusing glass panes are used in non-residential buildings for their uniform distribution of transmitted solar radiation and for privacy reason. To quantify their ability to destroy or maintain coherence in the image of an object, when this object is viewed through them, the view-through index was defined (REVIS project), starting from gonio-photometric measurement of the bidirectional transmission/ reflection distribution function (BTDF). The paper describes an innovative method, based on the analysis of images collected by a CCD detector or scanner and successive mathematical evaluation. This approach does not require complex measurement and expensive instrumentation and can give a good evaluation of the glass performance if the geometrical measurement conditions are correctly selected, considering the actual conditions of vision and perception. In this first work the mathematical and experimental basis of the measurement principle are describedI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.