The invention relates to a
structured light imaging
system suitable for
semiconductor SIP
system-in-
package, which comprises a central camera, and a plurality of groups of DLP projections and side cameras are symmetrically arranged on two sides of an
optical axis of the central camera; the DLP
projector emits parallel light beams to irradiate the surfaces of the
crystal grains, and the side cameras receive reflected light rays in parallel; the device further comprises a
control unit, and the
control unit sequentially controls the DLP projectors and the side cameras which are symmetrically arranged in pairs to synchronously work and processes image data so as to reconstruct the three-dimensional morphology of the surface of the
crystal grain. When incident light emitted by the DLP
projector irradiates the surface of the
crystal grain at a specific angle,
specular reflection light of the incident light propagates in the symmetrical direction according to the reflection law. The side camera and the DLP
projector are symmetrically arranged, so that the
optical axis of the side camera is consistent with a reflection light path, and a highlight area image generated by
mirror reflection is accurately captured. The
layout breaks through the limitation of the traditional
diffuse reflection hypothesis, so that the morphology information of the high-reflection surface can be completely acquired, and the accuracy and reliability of crystal grain three-dimensional reconstruction in SIP packaging are remarkably improved.