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sq(x) : x*x; |
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{ RCSid $Id$ } |
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{ |
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These formulas give exact results from the infinite |
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series solution for an uncoated pane of glass. |
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Inputs: |
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Tn = normal transmittance |
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n = index of refraction |
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Outputs: |
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rn = single-layer normal reflectivity |
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tn = transmissivity |
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Rn = normal reflectance |
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} |
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Tn = 0.88; { normal transmittance } |
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n = 1.52; { index of refraction } |
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rn = sq((1-n)/(1+n)); { reflectivity at normal incidence } |
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tn(Tn) = (sqrt(sq(sq(1-rn))+4*sq(rn*Tn))-sq(1-rn)) / 2/rn/rn/Tn; |
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sq(x) : x*x; |
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rn = sq((1-n)/(1+n)); |
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tn = (sqrt(sq(sq(1-rn))+4*sq(rn*Tn))-sq(1-rn)) / (2*sq(rn)*Tn); |
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Rn = rn + rn*sq((1-rn)*tn)/(1-sq(tn*rn)); |
