“…Albrecht-Bühler (2) considers one-sided oblique illumination in light microscopy, particularly the effect of increasingly incoherent illumination. Diffraction images of truncated triangular wave objects formed by a polarizing microscope with crossed polarizers are the subject of a theoretical letter by Chopra et al (42). The problem of resolution and its relationship to quantitative image analysis is discussed by Serra and Mueller (308).…”