Path: SpacecraftEstimation/StellarModels
% Spread of a point light source due to defocusing
Computes the spread of a point light source at infinity due to defocusing of
the lens. The point is on the boresight of the lens. The function computes the
total amount of light deposited in each cell of an nxn focal plane. This model
assumes that the incoming radiation is uniformly distributed across the
aperture. The integration function is very simple and requires a large mesh
size for accuracy.
If no arguments are entered it will generate a mesh plot.
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Form:
h = DeFocus( w, iAperture, fStop, focalLength, d, nMesh )
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Inputs
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w (1,1) Width of each cell in fraction of focal length
iAperture (1,1) Intensity of light at the aperture (watts/*^2)
fStop (1,1) F stop of the lens
focalLength (1,1) Focal length (*)
d (1,1) Distance from lens to focal plane in fraction
or multiples of focalLength
nMesh (1,1) The number of elements in the pixel mesh
(Default = 20)
* indicates any unit of length.
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Outputs
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h (n,n) Intensity profile (watts/*^2)
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Common: CommonData/SwooshWatermark Common: General/Watermark Common: Graphics/NewFig
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