| 摘要 |
1st and 2nd pulsed waves are transmitted along 1st and 2nd transmit beams where at least one of the beams is broad in at least one direction, and the transmit timing between said 1st and 2nd pulsed waves are selected so that the pulsed wave fronts overlap in an overlap region R(r,t) that propagates along at least one measurement or image curve &Ggr;(r) in the material object. At least the scattered signal produced by nonlinear interaction between said 1st and 2nd waves in the overlap region is received and processed to form a nonlinear interaction scattering image signal along &Ggr;(r). The measurement or image curve &Ggr;(r) can be scanned laterally by either changing of the relative transmit timing between the 1st and 2nd pulsed waves or the direction of at least one of the 1st and 2nd transmit beams, or both. The methods are applicable to image nonlinear scattering sources for both electromagnetic and elastic waves, and combinations of these. |
