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Base de datos CISDOC

ID (ISN) del documento42906
Número CIS 84-1881
ISBN(s) 91-7464-160-3
Año 1983
Número de serie Arbete och hälsa 1983:6
Autor(es) Carlsson L., Knave B., Lennerstrand G., Wibom R.
Título Glare with outdoor high-mast illumination - Visual acuity and contrast sensitivity effects in studies on different floodlighting systems
Título original Bländning vid utomhus högmast-belysning - Effekter på synskärpa och kontrastkänslighet i jämförande studier över olika [en sueco]
Información bibliográfica Arbetarskyddsstyrelsen, Publikationsservice, 171 84 Solna, Sweden, 1983. 27p. Illus. 7 ref.
Resumen Glare effects on visual acuity and contrast sensitivity were studied during outdoor timber yard work (sorting of logs) with two different systems of floodlighting. The binocular visual acuity of 19 volunteers was measured at 40, 55 and 80% contrast and the contrast sensitivity of 14 volunteers at spatial frequencies of 0.5 to 16 cycles/degree. One of the lighting systems used conventional floodlights with symmetrical distribution of the light over a wide area. The other system used a new type of oblique floodlight with an asymmetrical light distribution. With the light source 15° from the centre of the visual field, the visual acuity and the contrast sensitivity were consistently lower with the conventional type than with the new type of floodlight. Thus, not only is the vision of details impaired by glare but so is the contrast perception of coarse patterns. The workers scored the difference in glare between the two floodlight systems as "great" to "very great".
Descriptores (primarios) iluminación por proyección; contraste; deslumbramiento; serrerías; tareas visuales
Descriptores (secundarios) iluminación; agudeza visual; entresacado a mano
Tipo de documento E - Libros, informes, actas
Tema(s) Iluminación, color, visión
Broad subject area(s)
Navegación por categoria(s) Lumber and the woodworking industry
Non-ionizing radiation
Lighting and colour
Woodworking industry