Portable common path shearing interferometry-based holographic microscopy system with augmented reality visualization

Patent metadata

Field	Value
Publication number	US-11269294-B2
Application number	US-201916272581-A
Country	US
Kind code	B2
Filing date	Feb 11, 2019
Priority date	Feb 15, 2018
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

Portable common path shearing interferometry-based holographic microscopy systems. The system includes a light source, a sample holder, a microscope objective lens, a shear plate and an imaging device positioned in a common path shearing interferometry configuration. A housing is configured to receive and hold the shear plate and maintain a position of the shear plate relative to the microscope objective lens.

First claim

We claim:

1. A compact, portable common path shearing interferometry based holographic imaging system comprising:
a light source;
a sample holder;
a microscope objective lens;
a shear plate;
an imaging device; and
a housing configured to receive and hold the shear plate and maintain a position of the shear plate relative to the microscope objective lens, wherein the system is configured for positioning the light source, the sample holder, the microscope objective lens, the shear plate and the imaging device in a common path shearing interferometry configuration.

2. The system of claim 1 , wherein the system has a length of less than 350 mm, a width of less than 350 mm and a height of less than 300 mm.

3. The system of claim 1 , wherein the system has a length of less than 320 mm, a width of less than 320 mm and a height of less than 250 mm.

4. The system of claim 1 , wherein the system has a length of less than 150 mm, a width of less than 150 mm and a height of less than 250 mm.

5. The system of claim 1 , wherein the system has a mass of less than 6 kg.

6. The system of claim 1 , wherein the system has a mass of less than 2 kg.

7. The system of claim 1 , wherein the system has a mass of less than 1 kg.

8. The system of claim 7 , wherein the system exhibits temporal stability of 0.4 nm or better when used without mechanical isolation.

9. The system of claim 1 , wherein the system exhibits a temporal stability of 1.2 nm or better when used without mechanical isolation, where stability is the mean or average of the standard deviation calculated for every pixel of the imaging device over a period of time calculated at a video rate of 30 frames per second.

10. The system of claim 9 , wherein the system exhibits temporal stability of 0.9 nm or better when used without mechanical isolation.

11. The system of claim 10 , wherein the system exhibits temporal stability of 0.5 nm or better when used without mechanical isolation.

12. The system of claim 1 , wherein a beam path of the system is uninterrupted between the light source and the sample holder.

13. The system of claim 1 , wherein the light source is a laser light source, and wherein a beam path is disposed between the laser light source and the sample holder.

14. The system of claim 1 , wherein the optical path between the light source and the imaging device is uninterrupted except by the microscope objective, the shear plate, the sample and any support for the sample.

15. The system of claim 1 , wherein the housing comprises a shearing plate mounting portion including:
a slot configured to receive the shearing plate;
a first channel that enables light from the microscope objective to reach the shearing plate; and
a second channel that enables light from the shearing plate to reach the imaging device, wherein the second channel intersects the first channel.

16. The system of claim 15 , wherein the microscope objective is mounted in or at an opening of the first channel.

17. The system of claim 15 , wherein the sample holder is mounted on a sidewall of the housing.

18. The system of claim 15 , wherein the microscope objective, and the sample holder are mounted to the housing.

19. The system of claim 18 , wherein the imaging device is mounted to the housing.

20. The system of claim 18 , wherein the light source is mounted to the housing.

21. The system of claim 1 , wherein the light source includes a laser diode.

22. The system of claim 1 , wherein the imaging device is a mobile phone.

Assignees

• Univ Connecticut

Inventors

• Javidi Bahram
• Markman Adam
• Rawat Siddharth
• Anand Arun

Classifications

• G03H1/0443 Primary

  Digital holography, i.e. recording holograms with digital recording means (holobject computation G03H1/0866) · CPC title

• G03H2001/005

  in microscopy, e.g. digital holographic microscope [DHM] · CPC title

• G03H1/0005

  Adaptation of holography to specific applications (holographic optical element G02B5/32; holographic scanner G02B26/106; recognition using holographic mask G06V10/88; holographic memories G11B7/0065, G11C13/042) · CPC title

• G03H2001/0033

  in hologrammetry for measuring or analysing · CPC title

• G03H1/02 Primary

  Details {of features involved during the holographic process; Replication of holograms without interference recording} · CPC title