Why the divergence of collimating sources is not listed?
A. Since LTCL illuminators have to be used in combination with Telecentric Lenses, the optical system aperture depends only on the Telecentric lens aperture stop; for this reason, the collimating source divergence is not a relevant value. The divergence of the illuminators ranges from 0.1° to 1°; the collimation degree of LED sources is lower than in laser beam collimators which, in turn, could not be used effectively in machine vision applications because of diffraction effects, which would seriously affect the measurement accuracy Q.
