What isobjective lensinmicroscope

F. Zernike, F.J.M. Stratton, Diffraction Theory of the Knife-Edge Test and its Improved Form, The Phase-Contrast Method, Monthly Notices of the Royal Astronomical Society, Volume 94, Issue 5, March 1934, Pages 377–384, https://doi.org/10.1093/mnras/94.5.377

Oxford University Press is a department of the University of Oxford. It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide