We investigate image formations in gravitational lensing
systems using wave optics. Applying the Fresnel-Kirchhoff diffraction formula
to waves scattered by a gravitational potential of a lens object, we
demonstrate how images of source objects are obtained directly from wave
functions without using a lens equation for gravitational lensing. As an
example of image formation in gravitational lensing, images of a point source
by a point mass gravitational lens are presented. These images reduce to those
obtained by a ray tracing method in the geometric optics limit.
Cite this paper
Y. Nambu, "Wave Optics and Image Formation in Gravitational Lensing," International Journal of Astronomy and Astrophysics, Vol. 3 No. 1, 2013, pp. 1-7. doi: 10.4236/ijaa.2013.31001.
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