Presentation is loading. Please wait.

Presentation is loading. Please wait.

Introduction to the radiancy and the colour 2008 Technical Advisory Service.

Similar presentations


Presentation on theme: "Introduction to the radiancy and the colour 2008 Technical Advisory Service."— Presentation transcript:

1 Introduction to the radiancy and the colour 2008 Technical Advisory Service

2 Introduction to the radiancy and the colour The radiancy The solar spectrum The light Light transmission and reflexion Energetic transmission and reflexion Protection of the glass against radiancy The colour Conclusion

3 The radiancy Solar radiancy Radiators Close IR Long IR Radio waves V is ib le

4 The radiancy Type of radiancyWavelength Gamma raysfrom 0 to 0,01 nm X raysfrom 0,01 nm to 10 nm Ultraviolet (UV) - UV C - UV B - UV A from 10 nm to 380 nm from 2 nm to 280 m from 280 nm to 315 nm from 315 nm to 380 nm Lightfrom 380 nm to 780 nm Infrared (IR) - close IR A IR B - long IR C from 780 nm to 10 6 nm from 780 nm to 1400 nm from 1400 nm to 2500 nm from 2500 nm to 10 6 nm Radio wavesfrom10 6 nm to several km Solar spectru m

5 The radiancy Type of radiancyApplication - Effect Gamma rays X rays Radiography Ultraviolet (UV) Energy Tanning Cancer of the skin Blanching of objects Light Infrared (IR) - close IR A IR B - long IR C Energy of the solar radiancy Energy emitted by objects (radiators) Radio wavesRadios

6 Introduction to the radiancy and the colour The radiancy The solar spectrum The light Light transmission and reflexion Energetic transmission and reflexion Protection of the glass against radiancy The colour Conclusion

7 The solar spectrum Intensity (W/m²) Wavelength (nm) Energy 2500 UV Light Short infra red

8 The solar spectrum UV: 280 to 380 nm 5% energy Light: 380 to 780 nm 50% energy Short I.R.: 78O to 2500 nm 45% energy

9 The solar spectrum Solar constant : 1353 W/m² reflective absorbed dispersed direct

10 Introduction to the radiancy and the colour The radiancy The solar spectrum The light Light transmission and reflexion Energetic transmission and reflexion Protection of the glass against radiancy The colour Conclusion

11 Intensity (W/m²) Wavelength (nm) Light The solar spectrum

12 The ligth

13 (nm) Violet380 to 462 nm Blue462 to 500 nm Green500 to 577 nm Yellow577 to 600 nm Orange600 to 625 nm Red625 to 780 nm

14 Introduction to the radiancy and the colour The radiancy The solar spectrum The light Light transmission and reflexion Energetic transmission and reflexion Protection of the glass against radiancy The colour Conclusion

15 Light transmission and reflexion (380–780 nm) v = LT = transmitted light incident light Light LT v LR v

16 the light transmission depends on : the transmissions curve of the product the reference illuminant the eye sensibilty Light transmission and reflexion (380–780 nm)

17 Transmission curve of the product Single glazing 6 mm Longueur donde (nm) CLAIR BRONZE GRIS AZUR VERT Transmission (%) PRIVA BLUE Light transmission and reflexion (380–780 nm)

18 Reference illuminant Light transmission and reflexion (380–780 nm)

19 Reference lighting up : A: filament light bulb (automotive) C65: natural light D65: natural light (EN 410) Light transmission and reflexion (380–780 nm)

20 Eye sensitivity Light transmission and reflexion (380–780 nm)

21 Light transmission With = transmission curve of the product S() = eye sensitivity E() = reference illuminant Light transmission and reflexion (380–780 nm)

22 Light reflexion With = transmission curve of the product S() = eye sensitivity E() = reference lighting up Light transmission and reflexion (380–780 nm)

23 Index of reproduction of colours RD65 This index gives a quantitative evaluation of the difference in color between 8 samples of color-test lit directly by illuminating D65, and the light coming from same illuminating, transmitted by the glazing Light transmission and reflexion (380–780 nm)

24 Introduction to the radiancy and the colour The radiancy The solar spectrum The light Light transmission and reflexion Energetic transmission and reflexion Protection of the glass against radiancy The colour Conclusion

25 } SF SF = g = transmitted heat incident heat e qiqi qeqe ER e Heat Energetic transmission and reflexion (300–2500 nm)

26 Energetic equation : DET + EA + ER = 100 % e = ER = energetic reflexion e = DET = direct energetic transmission e = EA = energetic absorption SF = g = solar factor = total energetic transmission Energetic transmission and reflexion (300–2500 nm)

27 Clear glazing Stopray Safir Transmission (%) Wavelength (nm) Energetic transmission and reflexion (300–2500 nm)

28 Direct energetic transmission With = transmission curve of the product E() = solar spectrum of reference Energetic transmission and reflexion (300–2500 nm)

29 Solar factor (monolithic glazing) Energetic transmission and reflexion (300–2500 nm) For clear glazing, we have h i = 8 W/(m²K) and h e = 23 W/(m²K)

30 Energetic transmission and reflexion (300–2500 nm) h e = coefficient of surface heat exchange between the wall and the external environment absorption h i = coefficient of surface heat exchange between the wall and the interior environment

31 Transmission et réflexion énergétique (300–2500 nm)

32 Energetic transmission and reflexion (300–2500 nm) Remarks : indexes of the USA standards SHGC (solar heat gain coefficient) = SFS SC (shading coefficient) = sS/87 SC sw = DET/87 SC lw = SC – SC sw Relative Heat Gain: RHG (W/m²) = 630 SC + 7,8 U

33 Introduction to the radiancy and the colour The radiancy The solar spectrum The light Light transmission and reflexion Energetic transmission and reflexion Protection of the glass against radiancy The colour Conclusion

34 Protection of the glass against radiancy Protection against X rays Glass with high lead content

35 Protection of the glass against radiancy Protection against the UV Laminated glass TrUV, SPF, Krochman KDF The less the UV transmission, the less UV penetrate int he building Caution: no UV transmission is not synonymous with absence of discolouration (blanching)

36 Protection of the glass against radiancy Protection against the light and lighting of the buildings Coloured glazings, coated glass TL The highest the LT, the more light comes into the building. The lighting level of the buildings depends on the LT See training «Glass and solar control»

37 Protection of the glass against radiancy Protection against vision Opaque, mat, painted, printed glazings …

38 Protection of the glass against radiancy Protection against short IR and the heat Ccoloured glass, coated glass SF, (TrIR) The lowest the SF, the lowest heat comes into the building. The system of air conditioning of a building depends on the level of SF See training «Glass and solar control»

39 Protection of the glass against radiancy Protection against long IR Low emissivity glass (Top N, Top NT, Stopray, Planibel G, Sunergy) Emissivity Ug The heating system depends on the level of insulation of the building See training «Glass and thermal insulation»

40 Protection of the glass against radiancy Protection against radio waves Electrified coated glass

41 Protection of the glass against radiancy

42 Introduction to the radiancy and the colour The radiancy The solar spectrum The light Light transmission and reflexion Energetic transmission and reflexion Protection of the glass against radiancy The colour Conclusion

43 The colour

44

45

46 The colour of an object depends on : the illuminant which lights the object the object itself which modifies by transmission or reflexion the received light the eye of the observer and the transfer of the image towards the brain

47 The colour

48 To quantify a colour, it is thus necessary to know : the spectrum of energy emitted by the source of light the spectrum of transmission or reflexion of the object the response of the human eye

49 The colour Guild & Wright experiment

50 The colour

51 R, B, V graphic

52 The colour CIE 1931 colorimetric graphic

53 The colour Tristimuli X, Y, Z:

54 The colour

55 Tristimuli X, Y, Z: Rem: Y = TL Inconvenience : Are not sufficient to differentiate all the colours.

56 The colour Trichromaticity coordinates x, y, z:

57 The colour Trichromaticity coordinates x, y, z: Only 2 independent coordinates So we use : x, y, Y = TL

58

59 The colour Diagram of trichromaticity CIE 1931: contains 2 axis x and y sources A, B, C, D, … according to the used illuminant graduated wavelengths on the border = dominant wavelength the pureness of the tint P = m/n

60 (0,2; 0,5) n m

61 The colour Diagram of trichromaticity CIE 1931: Example: A point of coordinates (x, y) = (0,2; 0,5) corresponds to : a green colour a dominant wavelength = 512 nm a pureness of tint P = 4/10 = 0,4

62 The colour Diagram of trichromaticity CIE 1931: Inconveniences : The inferior side of the graphe corresponds to multichromatics colours we specify a negative dominant wavelength This system is not proportional to what the eye can see.

63 The colour

64 Hunter Lab System :

65

66 The colour CIE L*a*b* System:

67 The colour Système CIE L*a*b*:

68 The colour

69 Difference of coulour between 2 products :

70 The colour

71

72 CIE 1931 and CIE 1964 colorimetric graphic

73 The colour

74 Summary : Different systems exist : X, Y, Z x, y, z Lab L*a*b* CIELCH (L*, C*, h); UCS (Y, u, v), …

75 The colour Summary : In order to characterize a colour at the best, we must specify 5 values : 3 coordinates of colour 1 illuminant 1 angle of observation Example: Lab, D65, 2°

76 Introduction to the radiancy and the colour The radiancy The solar spectrum The light Light transmission and reflexion Energetic transmission and reflexion Protection of the glass against radiancy The colour Conclusion

77

78 Conclusions

79

80 Stopray Neutral 50/40 (LR = 15)

81 Conclusion The perception (colour, level of transmission and reflexion, …) that we have from an object, depends on : the object the illuminant the level on luminosity its environment (contrast) A same objet (thus a same glazing) will have a different aspect depending on its location, the time of the day, the surrounding objects, …


Download ppt "Introduction to the radiancy and the colour 2008 Technical Advisory Service."

Similar presentations


Ads by Google