| 摘要 |
PURPOSE:To classify and count a blood corpuscle accurately by providing a pulse height processing circuit which compares an artificial pulse signal, which is generated by using a pulse signal due to an impulsive scattered light as a trigger, with the pulse signal to classify and count blood corpuscles. CONSTITUTION:A laser light beam 2 emitted from a laser light source 1 is reflected on a plane mirror 3 and has the direction changed at right angles and is converged by a concave mirror 4 and is irradiated to a cell 6 through which a fluid including a blood corpuscle is flowed. Since the convergent light 5 of the laser reflected and converged in the vertical direction by the concave mirror 4 passes through a plane vertical to the flow passage of the cell 6 with a flat form, this light is irradiated to the blood corpuscle which passes through a narrow space one by one, successively, and the probability that plural blood corpuscles are irradiated simultaneously is reduced. Consequently, the light scattered successively by blood corpuscle is detected to attain a signal proportional to the number of blood corpuscle. In Fig., a photodetector 8 and a classifying and counting circuit 9 are provided. |
