Abstract A geometric method that attempts to synthesize all available geometric information on a pulsar is developed to constrain the 3-D structure of emission regions of pulsars. In terms of retarded magnetic dipolar field and with inclusion of aberration and retardation effects, the method is endeavored to constrain the geometrical parameters of emission regions via reproducing observational multi-wavelength features, e.g. pulse widths, phase offsets between different pulses and polarization properties. It is applied to gamma-ray pulsar B1055–52 which shows main pulse and inter-pulse at radio frequencies and double-peaked light curve at gamma-ray energy band. The results imply that the radio emission region probably consists of an inner and an outer ring, while the gamma-ray emission region is severely asymmetrical to magnetic axis.
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