PARTICLE ANALYZER, OPTICAL SYSTEM FOR PARTICLE ANALYZER, AND LENS FOR PARTICLE ANALYZER

摘要

A particle analyzer comprises a light source, a flow cell, an irradiating optical system, and a light receiving optical system. The light receiving optical system comprises a light focusing lens system which includes a light focusing lens configured to focus forward scattered light from the particles, a light receiving member configured to receive the forward scattered light, and a beam stopper. The beam stopper is provided in the light path between the light focusing lens system and the light receiving member. The light focusing lens has an aspheric lens form. The light focusing lens system is configured such that the focal distance of the forward scattered light through the central area which includes the optical axis is longer than the focal distance of the forward scattered light through the peripheral area outside the central area.

主权项

1. A particle analyzer, comprising:
a light source; a flow cell configured to flow a sample which includes particles; an irradiating optical system configured to irradiate light from the light source to a flow channel inside the flow cell; and a light receiving optical system configured to receive light from the flow channel, wherein the light receiving optical system comprises: a light focusing lens system which includes a light focusing lens configured to focus forward scattered light from the particles that flow in the flow channel; a light receiving member configured to receive the forward scattered light which is focused by the light focusing lens system; and a beam stopper configured to block direct light from the light source, wherein the beam stopper is provided in the light path between the light focusing lens system and the light receiving member, wherein the light focusing lens has an aspheric lens form, wherein the light focusing lens system is configured such that the focal distance of the forward scattered light through the central area which includes the optical axis is longer than the focal distance of the forward scattered light through the peripheral area outside the central area.