SINGLE PARTICLE DETECTOR USING LIGHT SCATTERING TECHNIQUES

摘要

The device (10) utilizes an impactor (17a) to set an upper limit on particle size. Sample fluid is passed through a high density light, with the intersection of the fluid and high density light forming a sensing volume. Particles in the fluid scatter light which is collected and focused by spherical mirrors (41, 42) onto detectors (34, 35). The scattered light causes a signal to be generated which is then compared by coincidence detecting circuitry in order to qualify whether a particle scattered the light.