Betekenis van:
illuminant

Voorbeeldzinnen

1. ‘Colour rendering’ (Ra), which is the effect of an illuminant on the colour appearance of objects by conscious or subconscious comparison with their colour appearance under a reference illuminant;
2. ‘Colour rendering’ (Ra), which means the effect of an illuminant on the colour appearance of objects by conscious or subconscious comparison with their colour appearance under a reference illuminant.
3. This shall be verified by the visual comparison test indicated above, the control field being illuminated by a light source of which the trichromatic coordinates differ by 0,01 from that of standard illuminant A.
4. When the retro-reflecting device is illuminated by ICI standard illuminant A, with an angle of divergence of 1/3° and an illumination angle of V = H = 0°, or, if this produces a colourless surface reflection, an angle V = ± 5°, H = 0°, the trichromatic coordinates of the reflected luminous flux must be within the following limits: ≤
5. Clear retro-reflecting devices must not produce a selective reflection, that is to say, the trichromatic coordinates ‘x’ and ‘y’ of the standard illuminant ‘A’ used to illuminate the retro-reflecting device must not undergo a change of more than 0,01 after reflection by the retro-reflecting device.