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Proceedings Paper

Visual resolution in incoherent and coherent light: preliminary investigation
Author(s): Katarzyna Sarnowska-Habrat; Boguslawa Dubik; Marek Zajac
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Paper Abstract

In ophthalmology and optometry a number of measures are used for describing quality of human vision such as resolution, visual acuity, contrast sensitivity function, etc. In this paper we will concentrate on the vision quality understood as a resolution of periodic object being a set of equidistant parallel lines of given spacing and direction. The measurement procedure is based on presenting the test to the investigated person and determining the highest spatial frequency he/she can still resolve. In this paper we describe a number of experiments in which we use test tables illuminated with light both coherent and incoherent of different spectral characteristics. Our experiments suggest that while considering incoherent polychromatic illumination the resolution in blue light is substantially worse than in white light. In coherent illumination speckling effect causes worsening of resolution. While using laser light it is easy to generate a sinusoidal interference pattern which can serve as test object. In the paper we compare the results of resolution measurements with test tables and interference fringes.

Paper Details

Date Published: 4 May 2001
PDF: 9 pages
Proc. SPIE 4241, Saratov Fall Meeting 2000: Optical Technologies in Biophysics and Medicine II, (4 May 2001); doi: 10.1117/12.431513
Show Author Affiliations
Katarzyna Sarnowska-Habrat, Wroclaw Univ. of Technology (Poland)
Boguslawa Dubik, Wroclaw Univ. of Technology (Poland)
Marek Zajac, Wroclaw Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 4241:
Saratov Fall Meeting 2000: Optical Technologies in Biophysics and Medicine II
Valery V. Tuchin, Editor(s)

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