Systems and methods of single-shot spatial frequency modulation imaging

Patent metadata

Field	Value
Publication number	US-12345866-B2
Application number	US-202217868562-A
Country	US
Kind code	B2
Filing date	Jul 19, 2022
Priority date	Jul 21, 2021
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

Systems and methods of imaging are described. An imaging system includes a light source configured to projecting a beam of light; a first diffraction grating configured to separating wavelengths of the projected beam of light; a first lens configured to focusing the wavelengths of the projected beam of light projecting from separated by the first diffraction grating; a reticle configured to altering each wavelength of light focused by the first lens; a second lens configured to collimating the wavelengths of light projecting from altered by the reticle; a second diffraction grating configured to multiplexing the collimated light projecting from collimated by the lens; and a third lens configured to projecting the multiplexed light onto an object plane, wherein the multiplexed light is used to generate an image of an object in the object plane.

First claim

What is claimed is:

1. A system for generating an image of an object, the system comprising:
a light source projecting a beam of light;
a first diffraction grating separating wavelengths of the projected beam of light;
a first lens focusing the wavelengths of the projected beam of light separated by the first diffraction grating;
a reticle altering each wavelength of light focused by the first lens;
a second lens collimating the wavelengths of light altered by the reticle;
a second diffraction grating multiplexing the light collimated by the lens; and
a third lens projecting the multiplexed light onto an object plane, wherein the multiplexed light is used to generate an image of an object in the object plane.

2. The system of claim 1 , wherein the reticle alters a spatial frequency of each wavelength.

3. The system of claim 1 , wherein the reticle is at a focal plane of the first lens.

4. The system of claim 1 , wherein the first lens is a cylindrical lens.

5. The system of claim 1 , further comprising:
a fourth lens projecting light from the object plane;
a third diffraction grating diffracting light projected by the fourth lens; and
a fifth lens projecting light diffracted by the third diffraction grating.

6. The system of claim 5 , wherein the image is generated by an image sensor receiving the light projected by the fifth lens.

7. The system of claim 5 , wherein the image is generated using an imaging spectrometer receiving the light projected by the fifth lens.

8. The system of claim 1 , wherein the first lens focuses the light projecting from the first diffraction grating to a line at the reticle.

9. The system of claim 1 , wherein the multiplexed light is projected by the third lens in a line at the object plane.

10. The system of claim 1 , further comprising a cylindrical lens placed between the light source and the first diffraction grating.

11. The system of claim 10 , wherein the first lens and the second lens are identical spherical lenses.

12. A method for generating an image of an object, the method comprising:
projecting a beam of light onto a first diffraction grating;
separating, with the first diffraction grating, wavelengths of the beam of light;
focusing, with a first lens, light projecting from the first diffraction grating;
altering, with a reticle, each wavelength of light focused by the first lens;
collimating, with a second lens, the light projecting from the reticle;
multiplexing, with a second diffraction grating, the collimated light projecting from the lens; and
projecting, with a third lens, the multiplexed light onto an object plane, wherein the multiplexed light is used to generate an image of an object in the object plane.

13. The method of claim 12 , wherein the reticle alters a spatial frequency of each wavelength.

14. The method of claim 12 , wherein the reticle is at a focal plane of the first lens.

15. The method of claim 12 , wherein the first lens is a cylindrical lens.

16. The method of claim 12 , further comprising:
projecting, with a fourth lens, light projecting from the object plane;
diffracting, with a third diffraction grating, light projected from the fourth lens; and
projecting, with a fifth lens, light diffracted by the third diffraction grating.

17. An imaging system comprising:
a light source, wherein the light source projects a beam of light;
a first diffraction grating, wherein the first diffraction grating projects separated wavelengths of the beam of light projected by the light source;
a first lens, wherein the first lens focuses the separated wavelengths projected by the first diffraction grating;
a reticle, wherein the reticle alters each wavelength focused by the first lens;
a second lens, wherein the second lens collimates the wavelengths altered from the reticle into a collimated beam of light;
a second diffraction grating, wherein the second diffraction grating multiplexes the collimated beam of light projecting from the second lens;
a third lens, wherein the third lens projects the multiplexed collimated beam of light onto an object in an object plane; and
an image sensor, wherein the image sensor receives the light projected onto the object and generates an image of the object.

18. The imaging system of claim 17 , wherein the reticle alters a spatial frequency of each wavelength.

19. The imaging system of claim 17 , wherein the first lens is a cylindrical lens.

20. The system of claim 17 , wherein the reticle is at a focal plane of the first lens.

Assignees

• Colorado School Of Mines

Inventors

• Czerski John
• Adams Daniel
• Squier Jeff

Classifications

• G02B21/06

  Means for illuminating specimens · CPC title

• G02B21/364

  Projection microscopes · 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

• G02B21/0064 Primary

  multi-spectral or wavelength-selective arrangements, e.g. wavelength fan-out, chromatic profiling (G02B21/0076 takes precedence) · CPC title

• G02B27/58 Primary

  Optics for apodization or superresolution; Optical synthetic aperture systems · CPC title