IP Library › Granted Patent US 12,339,217
Granted Patent B2
US 12,339,217 · App. 17/935,696 · Granted Jun 24, 2025

Flow cytometer

Inventors: Toru Imai (Tokyo, JP); Keisuke Toda (Tokyo, JP); Sadao Ota (Tokyo, JP)
Assignees: ThinkCyte K.K.; The University of Tokyo
G01N15/1436G01N15/01G01N2015/1006
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Quick Facts
Patent No.
US 12,339,217
App. No.
17/935,696
Granted
Jun 24, 2025
Kind
B2
Abstract

This flow cytometer includes a flow path through which an observation object flows with a fluid; an optical illumination system including a spatial optical modulation device, and a first optical element; and an optical detection system including a first light detector, wherein the optical illumination system further includes a first spatial filter disposed in a first optical path between a light source and an image position of light imaged in the flow path by the first optical element and having a first region which hinders traveling of light emitted from the light source towards the observation object, the optical detection system further includes a second light detector disposed in a second optical path between the first light detector and the image position and having a second region which directs the light modulated by the observation object towards the first light detector, and the position of the first region and the position of the second region are in a substantially optically conjugate relationship.

Claims (38)

1. A flow cytometer comprising:

a flow path configured to direct an object;

an optical illumination system comprising:

a light source configured to emit light;

a spatial optical modulator configured to generate a structured illumination pattern by modulating the light emitted from the light source;

a first spatial filter comprising:

a region disposed on a surface of the first spatial filter facing the light source, wherein the region is configured to generate a modified structured illumination pattern by hindering a portion of the structured illumination pattern; and

a first lens configured to form an image of the modified structured illumination pattern from the first spatial filter, wherein the image of the modified structured illumination pattern is disposed at a position in the flow path; and

wherein the first spatial filter is disposed in a first optical path between the light source and the position in the flow path;

an optical detection system comprising:

a second lens configured to direct a transmitted light from the object in the flow path onto a blocking region of a second spatial filter;

wherein the second spatial filter is disposed in a second optical path between a light detector and the position in the flow path;

wherein the second spatial filter comprises:

the blocking region; and

another region configured to direct a modified light modulated from the object in the flow path towards the light detector; and

wherein the light detector is configured to detect the modified light;

wherein the first spatial filter and the second spatial filtered are positioned in a substantially optically conjugate relationship.

2. The flow cytometer according to claim 1 , wherein the modified light comprises scattered light or diffracted light.

3. The flow cytometer of claim 1 , wherein the region of the first spatial filter hinders the portion of the structured illumination pattern transmitting, blocking, diffracting, or reflecting, or any combination thereof, of the portion of the structured illumination pattern.

4. The flow cytometer of claim 1 , wherein the first spatial filter further comprises a reflecting region configured to reflect another modified light from the object towards another light detector; wherein the reflecting region is disposed on a surface facing the position; and

wherein the optical detection system further comprises the another light detector; wherein the another light detector is configured to detect the another modified light from the reflecting region.

5. The flow cytometer of claim 1 , wherein the spatial optical modulator further comprises the first spatial filter.

6. The flow cytometer of claim 1 , wherein the spatial optical modulator comprises a diffractive optical element (DOE), a spatial light modulator (SLM), a digital micromirror device (DMD), or a film with a surface comprising a plurality of regions having different optical characteristics, or any combination thereof.

7. The flow cytometer of claim 1 , wherein the spatial optical modulator comprises a diffractive optical element (DOE).

8. The flow cytometer of claim 1 , wherein the spatial optical modulator comprises a film with a surface comprising a plurality of regions having different optical characteristics.

9. The flow cytometer of claim 1 , wherein the second lens is disposed between the position and the second spatial filter.

10. The flow cytometer of claim 1 , further comprising a flow cell, wherein the flow cell comprises the flow path.

11. The flow cytometer of claim 1 , wherein the spatial optical modulator is further configured to generate a first irradiation region on the first spatial filter by directing the structured illumination pattern to the first spatial filter.

12. The flow cytometer of claim 11 , wherein the first spatial filter further comprises a first overlapping region in which the first region and the irradiation region overlap.

13. The flow cytometer of claim 12 , wherein the second lens is further configured to generate a second irradiation region on the second spatial filter by directing the transmitted light of the structured illumination pattern to the second spatial filter.

14. The flow cytometer of claim 13 , wherein the second spatial filter further comprises a second overlapping region in which the another region and the second irradiation region overlap.

15. The flow cytometer of claim 14 , wherein the second lens is further configured to form an image of the first overlapping region onto the second spatial filter, and wherein the image of the first overlapping region has the same size or a larger size than the second overlapping region.

16. The flow cytometer of claim 1 , further comprising a third lens disposed between the second spatial filter and the light detector, wherein the third lens is configured to form an image of the modified light from the second spatial filter onto the light detector.

17. The flow cytometer of claim 1 , wherein the first spatial filter further comprises one or more propagating regions configured to transmit or reflect the modified structured illumination pattern towards the first lens.

18. The flow cytometer of claim 17 , wherein the region of the first spatial filter hinders the portion of the structured illumination pattern by transmitting the portion of the structured illumination pattern, and wherein the region is further configured to direct another modified light from the object towards another light detector, and

wherein the optical detection system further comprises the another light detector, wherein the another light detector is configured to detect the another modified light from the region of the first spatial filter.

19. The flow cytometer of claim 1 , wherein the spatial optical modulator is positioned between the light source and the first spatial filter in the first optical path.

20. The flow cytometer of claim 1 , wherein the another region of the second spatial filter directs the modified light to the light detector by transmitting or reflecting at least a portion of the modified light.

Assignments (3)
CORRECTIVE ASSIGNMENT TO CORRECT THE SPELLING OF ASSIGNEE'S NAME PREVIOUSLY RECORDED ON REEL 062018 FRAME 0379. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT OF ASSIGNORS INTEREST. Recorded Jan 18, 2024
From: IMAI, TORU; TODA, KEISUKE
To: THINKCYTE K.K.
Reel/Frame 066343/0661 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 7, 2022
From: IMAI, TORU; TODA, KEISUKE
To: THINKCYTE, INC.
Reel/Frame 062018/0379 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 7, 2022
From: OTA, SADAO
To: THE UNIVERSITY OF TOKYO
Reel/Frame 062018/0402 →
Priority Claims (1)
JP 2020-065940 · Apr 1, 2020 · national
Continuity (2)
Continuation PCTJP2021013478 · Mar 30, 2021
Related Publication 20230090631A1 · Mar 23, 2023
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