At 22:43, in the "infinity space", rays of green and yellow light propagate at different angles to the optical axis, what does this mean for the wavefront itself? If I have a bandpass filter that is specified for normal incidence, then different positions on the sample will mean different angle of incidence onto the filter in the "infinity space", which means I can no longer assume the same pass band for all sample positions! Surely I have made an error?
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At 22:43, in the "infinity space", rays of green and yellow light propagate at different angles to the optical axis, what does this mean for the wavefront itself? If I have a bandpass filter that is specified for normal incidence, then different positions on the sample will mean different angle of incidence onto the filter in the "infinity space", which means I can no longer assume the same pass band for all sample positions! Surely I have made an error?