Vol. 30, Issue 2-3, pp. 203-211 (2000)

Abstract

Asymptotic and numerical evaluation of the Fresnel diffraction integral for intensity distribution in the axial focal segment of conical axicon was accomplished to find the H coordinate of maximum in cases of monochromatic or polychromatic illumination. The experimental and theoretical values of H coordinate were found to be in good agreement. It has been shown that the axicon focal segment can be used as a tape-line for the length measurement.