Chapter/Index: Introduction | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Appendix
| Spatial coherency originates from the fact that the illumination is never perfectly parallel and is actually slightly convergent at the best imaging condition, which can be described as having a distribution of different illumination tilts.
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