Methods of resolution enhancement of laser diameter measuring instruments

Yury A. Chursin, Evgeny M. Fedorov

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The paper presents the implementation of diffraction and spectral analysis methods allowing 1 μm resolution enhancement of optical instruments intended for measurements of such round wire materials as cables, wires, cords, etc. with diameters exceeding the wavelength (∼0.5 mm and large). The transformation function suggested allows detecting geometrical boundaries of object's shadows that are used to calculate its diameter independently from its location in the gaging zone. The real-time detection algorithm is described for diffraction extreme values in the analog video signal produced by the chargecoupled device sensors. A method of additional improvement of resolution is shown on the basis of spectral analysis.

Original languageEnglish
Pages (from-to)86-92
Number of pages7
JournalOptics and Laser Technology
Publication statusPublished - 2015


  • Diffraction
  • In-process diameter measurement
  • Spectral analysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

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