skip to main content

Title: Longitudinal correlation properties of an optical field with broad angular and frequency spectra and their manifestation in interference microscopy

The results of theoretical and experimental studies of the longitudinal correlation properties of an optical field with broad angular and frequency spectra and manifestations of these properties in interference microscopy are presented. The joint and competitive influence of the angular and frequency spectra of the object-probing field on the longitudinal resolution and on the amplitude of the interference microscope signals from the interfaces between the media inside a multilayer object is demonstrated. The method of compensating the so-called defocusing effect that arises in the interference microscopy using objectives with a large numerical aperture is experimentally demonstrated, which consists in using as a light source in the interference microscope an illuminating interferometer with a frequency-broadband light source. This method of compensation may be used as the basis of simultaneous determination of geometric thickness and refractive index of media forming a multilayer object. (optical fields)
Authors:
;  [1]
  1. N.G. Chernyshevsky Saratov State University, Saratov (Russian Federation)
Publication Date:
OSTI Identifier:
22370650
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 43; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CORRELATIONS; INTERFACES; INTERFERENCE; INTERFEROMETERS; LAYERS; LIGHT SOURCES; MICROSCOPES; MICROSCOPY; REFRACTIVE INDEX; SIGNALS; SPECTRA; THICKNESS