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I would like to get an explanation on how to understand such a lens spot diagram: Spot diagram in Zemax

Thanks

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The size of the spot is the size an image of a point source will be on you detector.

In other words, the spot diagram gives indication of the image of a point object. In the absence of aberrations, a point object will converge to a perfect image point.

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Thanks. Meaning that for the same object point, I have a different size of spot for each pixel of my sensor? Here IMA: 0.000MM refers to the center of the sensor? And IMA: 5.500MM refers to a point located at 5.5000MM of the center? – Raphael Jan 11 '12 at 12:21
Not exactly a point, by 5.5mm must be the size of a point source you would be able to see ont he screen going by the above definition :) @Raphael – Jack Jan 11 '12 at 12:23
Sorry but I don't understand what means IMA: 5.5MM/0.0MM/3.0MM.. – Raphael Jan 11 '12 at 12:27
IMA describes the location of the centroid on the imaging surface – Jack Jan 11 '12 at 12:33
This Biphotonics article should help you . Dont wrorry by the bophotonics name, go to fig 6 and related discussion, you will be at bay :) @Raphael – Jack Jan 11 '12 at 12:34
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