The initial search method is to help find one single point on the object.
As an image acquisition modality, this is distinct from X-ray fluorescence scanning to obtain an XRF spectrum at every single point on an object, which could also be claimed as a type of hyperspectral imaging.
In CLSM, only one single point in microscopic objects is illuminated at any time and this point is then imaged into the pinhole at the entrance of the photo-detector while out-of-focus signals are blocked.
Usually the image formed by a single lens is not good enough for precise work in such fields as astronomy, microscopy, and photography; this is because the cone of rays emitted by a single point in a distant object is not united in a perfect point by the lens but instead forms a small patch of light.
"Western perspective is from a single point of view, with objects either closer or farther away," he explained.
He knew Cézanne; Gauguin; and Picasso, who along with Braque pioneered cubism, a movement that quickly spread into sculpture, architecture, literature, and music, moving beyond single point perspective to capture objects from many angles at once, forever changing the way we view the world.
If a lens were perfect and the object were a single point of monochromatic light, then, as noted above, the light wave emerging from the lens would be a portion of a sphere centred about the ideal image point, lying in the paraxial image plane at a height above the axis given by the Lagrange theorem.
Asymmetry and fitting error are then extracted for each sweep across the object, giving a single point in an abstract phase space.
It is just a single point, because it corresponds to all three objects maintaining the same distance apart by orbiting (in real space) in a circle.
