Particle analyzer

• US 5,831,723 A
• Filed: 04/02/1997
• Issued: 11/03/1998
• Est. Priority Date: 04/03/1996
• Status: Expired due to Term

• Current Assignee: Tao Medical Electronics Co., Ltd. (Sysmex Corporation), Toa Medical Electronics Co., Ltd.
• Original Assignee: Toa Medical Electronics Co., Ltd.
• Inventors: Kusuzawa, Hideo, Kubota, Fumio
• Primary Examiner(s): McGraw, Vincent P.
• Application Number:
  US08/832,559
• Time in Patent Office: 580 Days
• Field of Search: 356/73, 356/23
• US Class Current: 356/73
• CPC Class Codes: G01N 15/1433 using image recognition
• CPC Class Codes: G01N 15/1459 the analysis being performed on a sample stream

Abstract

A particle analyzer includes a sheath flow cell for converting a particle containing sample into a sample flow, a first light source for illuminating the sample flow by a continuous light, a light detecting element for detecting a light emitted from a particle illuminated by the first light source and for converting the light into a particle signal indicative of a characteristic of the particle, a second light source for illuminating the sample flow by a momentary light, an imaging device for capturing an image of a particle illuminated by the second light source, an analyzing section for performing particle analysis by employing the particle signal and the image of the particle as analysis data for analyzing the particle, and an inhibiting section for inhibiting the analyzing section from employing, as the analysis data, the particle signal obtained when the second light source illuminates the sample flow.

Claims

1. A particle analyzer comprising:

a sheath flow cell for converting a particle containing sample into a sample flow;

a first light source for illuminating the sample flow by a continuous light;

a light detecting element for detecting a light emitted from a particle illuminated by the first light source and for converting the light into a particle signal indicative of a characteristic of the particle;

a second light source for illuminating the sample flow by a momentary light;

an imaging device for capturing an image of a particle illuminated by the second light source; and

an analyzing section for performing particle analysis by employing the particle signal and the image of the particle as analysis data for analyzing the particle; and

an inhibiting section for inhibiting the analyzing section from employing, as the analysis data, the particle signal obtained when the second light source illuminates the sample flow.

2. The particle analyzer as defined in claim 1, wherein the analyzing section includes an A/D converter for A/D converting in advance the particle signal input from the light detecting element and the inhibiting section includes means for temporarily inhibiting converting operation of the A/D converter when the second light source illuminates the sample flow.

3. The particle analyzer as defined in claim 1, wherein the analyzing section includes an A/D converter for A/D converting in advance the particle signal input from the light detecting element and the inhibiting section includes means for temporarily inhibiting the light detecting element from inputting the particle signal to the A/D converter when the second light source illuminates the sample flow.

4. The particle analyzer as defined in claim 1, wherein the analyzing section includes an A/D converter for A/D converting in advance the particle signal input from the light detecting element and a storing section for storing the A/D converted particle signal, and the inhibiting section includes means for temporarily inhibiting the storing section from storing the A/D converted particle signal when the second light source illuminates the sample flow.

5. The particle analyzer as defined in claim 1, wherein the analyzing section includes:

an A/D converter for A/D converting in advance the particle signal input from the light detecting element;

identifier adding means for adding, to the A/D converted particle signal, an identifier indicative of the particle signal obtained when the second light source illuminates the sample flow; and

a storing section for storing the A/D converted particle signal having the added identifier,

the inhibiting section includes means for inhibiting the analyzing section from employing the particle signal having the identifier as the analysis data.