Method and apparatus for digital holographic microtomography

Patent metadata

Field	Value
Publication number	US-2018266806-A1
Application number	US-201715628272-A
Country	US
Kind code	A1
Filing date	Jun 20, 2017
Priority date	Mar 17, 2017
Publication date	Sep 20, 2018
Grant date	—

Abstract

A method for digital holographic microtomography comprises (a) providing at least one wavefront controlling device for driving a sample to be rotated and/or an incident beam scanning the sample, (b) utilizing a digital holographic access unit for recording the transmitted or reflected wavefronts of the sample, (c) utilizing a digital holography reconstructing method for reconstructing the transmitted or reflected wavefronts of the sample, and (d) utilizing a tomographic reconstruction approach for reconstructing three dimensional image information of the sample.

First claim

What is claimed is:

1 . A method for digital holographic microtomography, comprising:
(a) providing at least one wavefront controlling device for driving a sample to be rotated and/or an incident beam scanning said sample; (b) utilizing a digital holographic access unit for recording transmitting or reflecting wavefronts of said sample; (c) utilizing a digital holographic reconstruction approach for reconstructing said transmitting or reflecting wavefronts of said sample; and (d) utilizing a tomographic reconstruction approach for reconstructing three dimensional image of said sample.

2 . The method of claim 1 , wherein said at least one wavefront controlling device includes a spatial light modulator.

3 . The method of claim 1 , wherein said at least one wavefront controlling device includes an electrically controlled light reflector.

4 . The method of claim 1 , wherein said at least one wavefront controlling device includes a mirror loaded piezoelectric transducer.

5 . The method of claim 1 , wherein said at least one wavefront controlling device includes a liquid crystal on silicon device.

6 . The method of claim 1 , wherein said digital holographic access unit includes a photodetector array or an image sensor.

7 . The method of claim 1 , wherein said digital holographic reconstruction approach includes Fourier transform approach.

8 . The method of claim 1 , wherein said digital holographic reconstruction approach includes convolution approach.

9 . The method of claim 1 , wherein said digital holographic reconstruction approach includes angular spectrum approach.

10 . The method of claim 1 , wherein said digital holographic reconstruction approach includes Fresnel diffraction approximate approach.

11 . The method of claim 1 , wherein said tomographic reconstruction approach includes back projection approach.

12 . The method of claim 1 , wherein said tomographic reconstruction approach includes back propagation approach.

13 . The method of claim 1 , wherein said tomographic reconstruction approach includes Fourier slice theorem approach.

14 . The method of claim 1 , wherein said tomographic reconstruction approach includes Fourier diffraction theorem approach.

15 . An apparatus for digital holographic microtomography, comprising:
at least one wavefront controlling device for optically driving a sample to be rotated and/or an incident beam scanning said sample; at least one lens configured for collecting transmitting or reflecting wavefronts of said sample; and a photodetector array or an image sensor configured under said at least one lens.

16 . The apparatus of claim 15 , wherein said at least one wavefront controlling device includes a spatial light modulator.

17 . The apparatus of claim 15 , wherein said at least one wavefront controlling device includes an electrically controlled light reflector.

18 . The apparatus of claim 15 , wherein said at least one wavefront controlling device includes a mirror loaded piezoelectric transducer.

19 . The apparatus of claim 15 , wherein said at least one wavefront controlling device includes a liquid crystal on silicon device.

20 . The apparatus of claim 15 , further comprising a beam splitting element configured in front of said at least one wavefront controlling device.

Assignees

• Univ Nat Taiwan Normal

Inventors

• Cheng Chau-Jern
• Lin Yu-Chih
• Tu Han-Yen

Classifications

• G03H1/0866

  Digital holographic imaging, i.e. synthesizing holobjects from holograms · 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

• G01B9/02083

  characterised by particular signal processing and presentation · CPC title

• G01B9/021 Primary

  using holographic techniques · CPC title

• A61B5/0066

  Optical coherence imaging · CPC title