Reconstruction of incoherent source Bessel beam

Abstract

Based on the Hankel wave theory, reconstruction property of Bessel beam generated by incoherent source is analyzed. The section light intensity distribution of Bessel beam after on-axis circular obstacle is simulated by optical design software ZEMAX. Light emitting diode (LED) has a certain spectrum width, therefore we describe it by using a continuous spectrum with a certain range of spectral width. From the simulation results we can see visually that Bessel beam gradually realizes the reconstruction after circular obstacles on-axial shelter. It is proved that LED has the reconstruction property. We use LED and axcion element to generate Bessel beam. This Bessel beam passes though an on-axis circular obstacle and an on-axis square obstacle. We take the pictures of the section light intensity distribution at different positions. The reconstruction properties of the LED incoherent source are verified. Experimental results accord well with the simulation results.