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1.1 |
{ New functions for calculating light transmission through prisms.
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R. Compagnon and F. Di Pasquale (Spring 1992)
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LESO-PB
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EPFL
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CH-1015 LAUSANNE
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G. Ward modified for new fprism.c 6/30/93
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}
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{ function fprism(A1..A10) performs the calculations
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A1: length a of the prism panel
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A2: length b "
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A3: length c "
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A4: length d "
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A5: indice of refraction of the prism material
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A6: fraction of the incident ray under which the ray propagation inside
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the prism is aborted (0<A6<1)
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A7: indicates which face of the prism is covered by a metallic layer
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1: face beta
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2: face gamma
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4: no face
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A8: reflection factor of the metallic layer (0<=A8<=1)
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A9: angle tolerance (in radians) for combining rays travelling nearly
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in the same direction
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A10: angle tolerance (in radians) for assuming that a ray is directed
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toward a source
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function fprism_val(a,b,c,d) is used to pick the necessary output values
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calculated by fprism
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a: selector for choosing which value we ask for:
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0: X direction of the ray
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1: Y "
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2: Z "
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3: transmission or reflection factor of the ray
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b: selector for choosing which kind of ray we ask for:
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-1: a reflected ray is expected
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0: any ray (reflected or transmitted) is expected
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1: a transmitted ray is expected
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c: rank of the expected ray (1<=c)
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}
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tau1 = fprism_val(3,1,1);
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dx1 = fprism_val(0,1,1);
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dy1 = fprism_val(1,1,1);
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dz1 = fprism_val(2,1,1);
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tau2 = fprism_val(3,1,2);
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dx2 = fprism_val(0,1,2);
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dy2 = fprism_val(1,1,2);
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dz2 = fprism_val(2,1,2);
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