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Modified optika.sensors.absorbance() to not consider reflections from the non-illuminated side for performance reasons. #120

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Modified optika.sensors.absorbance() to not consider reflections from the non-illuminated side for performance reasons. #120

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ef81bd4
Modified `optika.sensors.absorbance()` to _not_ consider reflections …
roytsmart Sep 20, 2025
65fd04e
further improvements
roytsmart Sep 21, 2025
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43 changes: 27 additions & 16 deletions optika/sensors/_materials/_materials.py
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Original file line number Diff line number Diff line change
Expand Up @@ -126,29 +126,40 @@ def absorbance(
if not isinstance(chemical_substrate, optika.chemicals.AbstractChemical):
chemical_substrate = optika.chemicals.Chemical(chemical_substrate)

result = optika.materials.layer_absorbance(
index=1,
layer_oxide = optika.materials.Layer(
chemical=chemical_oxide,
thickness=thickness_oxide,
interface=optika.materials.profiles.ErfInterfaceProfile(
width=roughness_oxide,
),
)

layer_substrate = optika.materials.Layer(
chemical=chemical_substrate,
thickness=thickness_substrate,
interface=optika.materials.profiles.ErfInterfaceProfile(
width=roughness_substrate,
),
)

_, transmissivity_oxide = optika.materials.multilayer_efficiency(
wavelength=wavelength,
direction=direction,
n=n,
layers=[
optika.materials.Layer(
chemical=chemical_oxide,
thickness=thickness_oxide,
interface=optika.materials.profiles.ErfInterfaceProfile(
width=roughness_oxide,
),
),
optika.materials.Layer(
chemical=chemical_substrate,
thickness=thickness_substrate,
interface=optika.materials.profiles.ErfInterfaceProfile(
width=roughness_substrate,
),
),
layer_oxide,
],
substrate=layer_substrate,
)

absorption = chemical_substrate.absorption(wavelength)

decay = np.exp(-absorption * thickness_substrate)

transmissivity_total = transmissivity_oxide * decay

result = transmissivity_oxide - transmissivity_total

return np.real(result)


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