The excitation spectrum of the A0(+) (5(3)P(1)) - X0(+)(5(1)S(0)) transition in the CdHe van der Waals molecule has been recorded in an experiment of a continuous supersonic molecular beam crossed with a pulsed dye laser beam. Rotational analysis of the spectrum leads to more accurate estimation of molecular bond lengths in the ground and lowest excited states. Am agreement of experimental results with the most recent ab initio calculations is demonstrated.