The invention relates to equipment for analyzing physical properties of various particles, in particular to a multidimensional optical information sensor for analyzing physical properties of particles. The sensor comprises a
laser source, a first focusing lens group, a diaphragm, a double-bellmouth flow
pipe, an optical trap, a two-dimensional composite focusing
system consisting of a hollow ellipsoidal reflecting surface and a second focusing lens group along the vertical direction of incident light, a diaphragm, a photoelectric
detector, a two-dimensional spectral focusing
system consisting of a lens and a planar mirror along the forward direction of incident light, a diaphragm and a photoelectric
detector. The sensor can integrally acquire the particle
light scattering universal transient optical information and convert to electrical
signal, and has the characteristics of comprehensive and rich optical information and low light
noise, the optical
information acquisition system is compact in structure, and the application of optical lenses is flexible, thereby realizing integrated collection of four-dimensional optical information and completely reflecting the physical properties of various particles.