System and method for phase contrast microscopy imaging

Patent metadata

Field	Value
Publication number	US-11150461-B2
Application number	US-202017098410-A
Country	US
Kind code	B2
Filing date	Nov 15, 2020
Priority date	Nov 15, 2019
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

The present invention discloses a system and a method for phase contrast microscopy imaging. The system includes a microscope, a light source array, an image acquisition module and a calculation module. The light source array includes a fixture having a through hole and two light source groups arranged around the through hole. The two light source groups emit a first beam and a second beam symmetrically arranged about a optical axis of the microscope to illuminate a specimen. The light beams enter and get scattered in the specimen and are obliquely transmitted through the specimen, and collected by the microscope after passing through the through hole. The image acquisition module acquires a first image corresponding to the first beam and a second image corresponding to the second beam. The calculation module obtains a phase contrast image according to the first and second image.

First claim

What is claimed is:

1. A system for phase contrast microscopy imaging, comprising:
a microscope with an optical axis, wherein the microscope comprises an objective;
a light source array comprises a fixture and two light source groups, wherein the fixture is disposed on the object side of the objective and has a through hole, and the two light source groups is disposed on the side of the fixture away from the objective and is arranged around the through hole, wherein the two light source groups respectively emit a first beam and a second beam symmetrically arranged about the optical axis to illuminate a specimen, and wherein the first beam and the second beam enter and get scattered in the specimen and are obliquely transmitted through the specimen, and collected by the microscope after passing through the through hole;
an image acquisition module that is disposed on the image side of the microscope, for acquiring a first image corresponding to the first light beam and a second image corresponding to the second light beam;
a calculation module for restoring primary color components of the first image and the primary color components of the second image and subtracting the primary color components obtained from the first image and the primary color components obtained from the second image to obtain a phase contrast image;
wherein the light source groups comprise a plurality of light sources, and the light sources in one light source group and the light sources in the other are arranged symmetrically about the optical axis;
wherein two symmetrical light sources in the light source groups are monochromatic light sources, the other light sources in the light source groups are visible light sources or monochromatic light sources, and the other light sources in different light source groups that are symmetrical about the optical axis are the same.

2. The system of claim 1 , wherein the size of the through hole is not larger than the field of view of the objective.

3. The system of claim 1 , wherein the fixture is a circuit board, and the two light source groups are powered by the circuit board.

4. The system of claim 1 , wherein the specimen is located at a side of the light source array away from the objective, and the light source array is close to the specimen when the specimen is illuminated.

5. The system of claim 1 , wherein the two symmetrical monochromatic light sources are same-color monochromatic light sources or different-color monochromatic light sources, and when the symmetrical monochromatic light sources are same-color monochromatic light sources, the two light source groups emit the first light beam and the second light beam in sequence, and when the symmetrical monochromatic light sources are different-color monochromatic light sources, the two light source groups emit the first light beam and the second light beam simultaneously or sequentially.

6. The system of claim 1 , wherein one of the two symmetrical monochromatic light sources is a red primary color light source that emits red light, and the other is a blue primary color light source that emits blue light.

7. The system of claim 1 , wherein one of the two symmetrical monochromatic light sources is a blue primary color light source that emits blue light, and the other is a green primary color light source that emits green light.

8. A method for phase contrast microscopy imaging, comprising following steps:
two light source groups of a light source array respectively emit a first beam and a second beam symmetrically arranged about an optical axis of a microscope to illuminate a specimen, wherein the first beam and the second beam enter and get scattered in the specimen and are obliquely transmitted through the specimen, and collected by a microscope after passing through a through hole of the light source array;
an image acquisition module acquires a first image corresponding to the first light beam and a second image corresponding to the second light beam on the image side of the microscope;
a calculation module restores the primary color components of the first image and the primary color components of the second image and subtracts the primary color components obtained from the first image and the primary color components obtained from the second image to obtain a phase contrast image.

Assignees

• Ankon Medical Tech Shanghai Co Ltd

Inventors

• Duan Xiaodong
• Wang Qingqing
• You Qinghu

Classifications

• G02B21/14 Primary

  affording illumination for phase-contrast observation · CPC title

• G02B21/082

  for incident illumination only · CPC title

• G02B21/361

  Optical details, e.g. image relay to the camera or image sensor (G02B21/364 takes precedence; illumination details G02B21/06 and subgroups) · CPC title

• H04N9/645

  Beam current control means · CPC title

• G02B21/367 Primary

  providing an output produced by processing a plurality of individual source images, e.g. image tiling, montage, composite images, depth sectioning, image comparison · CPC title