| 摘要 |
PURPOSE:To make the photodetection of scattered light having the max. intensity possible by disposing a means for detecting the scattered light at approximately 45 deg. with the incident direction of radiation in the stage of measuring immune reaction by making use of the intensity fluctuation of scattered light. CONSTITUTION:The immune reaction based on an antigen-antibody reaction is measured by making use of the intensity fluctuation of the scattered light by fine particles. A laser beam flux 2 from a light source 1 is made into a beam flux 4 by a semi-transparent mirror 3 in this stage. Said beam is condensed by a condenser lens 6 and is projected to a cell 7 in which the antigen- antibody reactive liquid contg. the fine particles 9 is contained. The scattered light thereof is made incident through a collimator 10 disposed at approximately 45 deg. with the direction of the projected light to a photodetector 11 and the output thereof is supplied via a low-pass filter 16 to a data processing unit 14. The efficient photodetection of the scattered light having the max. intensity is thus made possible and the measurement data having high reliability is obtd. by eliminating the influence of noise, etc. |
