Abstract： AS/NZS 1906.4:2010 pdf download.Retroreflective materials and devices forroad traffic control purposes Part 4: High-visibility materials for safetygarments. 1.3.1.3 Rotation angle (e) The angle measured from an arbitrary starting point thro...

AS/NZS 1906.4:2010 pdf download.Retroreflective materials and devices forroad traffic control purposes Part 4: High-visibility

materials for safetygarments.

1.3.1.3 Rotation angle (e)

The angle measured from an arbitrary starting point through which the retroretlective material is rotated during the photometric

testing. about an axis normal to, and passing through the centre of. the piece.

1.3.2 Light technical parameters

1.3.2.1 coefficient of luminous intensity (CIL)

The quotient expressed in candela per lux (cd.Ix’), obtained by dividing the luminous intensity, in the direction considered, by

the illuminance at the retroreflective surface, for given observation. entrance and rotation angles. It is referred to as the ‘CIL value’.

NOTE: This coefficient is applicable to devices that are effectively point sources of light at normal viewing distances.

1.3.2.2 Coefficient of luminous intensity per unit area

The value expressed in candela per lux per square metre (cd.1x .m— )‘ obtained by dividing the coefficient of luminous intensity of a test piece by the area in square metres of that test piece measured parallel to its surface. It is referred to as the CIUm

value’.

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