Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 429200
Title Transvision: A light transmission measurement system for greenhouse covering materials
Author(s) Swinkels, G.L.A.M.
Source In: VII International Symposium on Light in Horticultural Systems, Wageningen, The Netherlands, 15 - 18 October, 2012. - Leuven : ISHS - p. 563 - 568.
Event Leuven : ISHS VII International Symposium on Light in Horticultural Systems, Wageningen, 2012-10-15/2012-10-18
Department(s) WUR GTB Tuinbouw Technologie
Publication type Contribution in proceedings
Publication year 2012
Abstract Abstract: For determining the optical performance of greenhouse covering materials other than standard float glass the current Dutch NEN 2675 norm is no longer appropriate. The emergence of a new generation of materials (diffuse, layered) resulted in a new measuring protocol developed by TNO and Wageningen UR. In line with this protocol Wageningen UR has developed an accurate measuring device (Transvision) for measuring the light transmittance for direct and hemispherical incident light. The device is based on spectral analysis of a perpendicular beam passing the material under a variable angle of incidence into an integrating sphere. With the angular transmission data, the hemispherical transmission can be calculated which is the most important benchmark for the performance as a covering material at northern latitudes. The device is specially developed for measuring thick, multi-layer and large materials which cannot be cut for testing, like tempered or structured glass panes. For clear float glass the device meets the specifications of the NEN 2675 and the results are comparable with those of professional spectrometer systems.
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