The invention discloses an oblique incident
laser particle analyzer for realizing the measurement of a full-range (0-180 degrees) scattering angle. The oblique incident
laser particle analyzer comprises a
laser, a lens group, a sample
cell and viewfinders. The oblique incident laser particle analyzer is characterized in that the lens group consists of a front lens and a rear lens which share the same
optical axis; the front lens and the rear lens are respectively arranged at the front side and the rear side of the sample
cell, so that the center of the sample
cell is positioned on the
optical axis; the laser is obliquely arranged at the rear side of the rear lens; emitted
laser beams pass through the edge part of the rear lens to form parallel light which obliquely enters the center of the sample cell; and the viewfinders comprise a front
viewfinder positioned at the front part of the front lens and a rear
viewfinder positioned at the rear lens and can be used for receiving a scattering
light signal from particles in the sample cell. According to the oblique incident laser particle analyzer, the problems of low sensitivity and resolution caused by
narrow range of the scattering angle received by the lenses are solved; and the oblique incident laser particle analyzer has the characteristics of high sensitivity and resolution, high test accuracy, wide range of measuring the
particle size distribution, and the like.