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Related Concept Videos

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Related Experiment Video

Updated: Jun 11, 2026

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects
10:16

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

Published on: February 8, 2014

Digital holographic tomography based on spectral interferometry.

Lingfeng Yu1, Zhongping Chen

  • 1Department of Biomedical Engineering, Beckman Laser Institute, University of California, Irvine, Irvine, California 92612, USA. yulingfeng@gmail.com

Optics Letters
|October 17, 2007
PubMed
Summary
This summary is machine-generated.

A new digital holographic tomography system uses a broadband light source and spectral interferometer for faster 3D imaging. This method improves acquisition speed over traditional systems for detailed tomographic reconstruction.

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Area of Science:

  • Optical Engineering
  • 3D Imaging Technology
  • Holography

Background:

  • Conventional digital holographic systems often face limitations in acquisition speed.
  • Wavelength-scanning techniques are commonly used but can be time-consuming.
  • There is a need for faster and more efficient 3D tomographic imaging methods.

Purpose of the Study:

  • To develop a novel digital holographic tomography system.
  • To enhance the acquisition speed of tomographic imaging.
  • To demonstrate a new approach for creating 3D tomographic images using synthesized holograms.

Main Methods:

  • Utilized an inexpensive broadband light source and a fiber-based spectral interferometer.
  • Synthesized multiple holograms (object wave fields) at different wavelengths via transverse probe beam scanning.
  • Calculated optical fields from synthesized holograms and numerically superposed them for 3D tomographic image reconstruction.

Main Results:

  • Successfully developed a digital holographic tomography system.
  • Achieved improved acquisition speed compared to conventional wavelength-scanning systems.
  • Demonstrated the feasibility of the proposed method through experimental validation.

Conclusions:

  • The developed system offers a faster alternative for digital holographic tomography.
  • The use of synthesized holograms and numerical superposition enables efficient 3D image reconstruction.
  • This approach holds promise for various applications requiring rapid 3D tomographic imaging.