Optical system for a holographic microscope including a spatial filter

摘要

An optical system for a holographic microscope includes: a light source configured to emit a light beam; a grating configured to split the light beam into a reference beam and an object beam; a lens unit configured to irradiate a sample by the reference and object beams split by the grating; a spatial filter including a first region for the reference beam and a second region for the object beam; and a detector configured to detect an interference pattern caused by the reference and object beams.

主权项

1. An optical system for a holographic microscope comprising:
a light source configured to emit a light beam; a grating configured to split the light beam into a reference beam and an object beam, the reference beam being a beam bent by the grating, and the object beam being a beam which goes straight through the grating; a first polarizer configured to make the reference beam and the object beam be polarized differently from each other; wherein, the grating and the first polarizer are positioned such that a sample is irradiated by both the reference beam and the object beam split by the grating and polarized by the first polarizer; a spatial filter made up of a second polarizer and a pinhole, the pinhole being provided at a position distant from a center of the spatial filter; wherein the object beam from the sample passes the second polarizer and the pinhole, and the reference beam from the sample passes the pinhole and does not pass through the second polarizer; and a detector configured to detect an interference pattern caused by the reference beam after it has passed through the pinhole and the object beam after it has passed through the second polarizer and the pinhole.