Hi,
I’m using ZOS-API in python to analyse PSFs using the Huygens and FFT methods. Is there a way to extract the airy radius and return it to Python?
Hi,
I’m using ZOS-API in python to analyse PSFs using the Huygens and FFT methods. Is there a way to extract the airy radius and return it to Python?
Thanks David, that works!
Hi Charlotte,
I could be wrong but the Airy radius should be:
To solve this formula you need the wavelength (lambda), and the numerical aperture (NA). Both can be retrieved through the ZOSAPI. Specifically, the ISNA (image-space NA) operand gives you the NA of your system through the Merit Function Editor. In the ZOSAPI you can evaluate a single operand without calculating the entire Merit Function using the Merit Function Editor (MFE) method:
GetOperandValue(MeritOperandType type, int srf, int wave, double Hx, double Hy, double Px, double Py, double Ex, double Ey)
So, a piece of code like below should return the Airy radius in Python:
# Wavenumber in OpticStudio
wavenumber = 1
# Wavelength hum]
wavelength = TheSystem.SystemData.Wavelengths.GetWavelength(wavenumber).Wavelength
# Retrieve Merit Function Editor (MFE)
mfe = TheSystem.MFE
# Evaluate ISNA (Image-Space NA)
isna = mfe.GetOperandValue(ZOSAPI.Editors.MFE.MeritOperandType.ISNA, 0, 0, 0, 0, 0, 0, 0, 0)
# Calculate Airy radius
airy = 1.22 * wavelength / (2 * isna)
# Display the result
print(airy)
I hope this helps.
Take care,
David
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