Optics Express· 2015Q1
Reference-less measurement of the transmission matrix of a highly scattering material using a DMD and phase retrieval techniques
- 237citations
- Q1SCImago
- 2015year
Short summary
A new method measures the transmission matrix (TM) of highly scattering materials using only intensity measurements from a CCD camera and a digital micromirror device (DMD), eliminating the need for a reference beam.
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Key points
- Developed a reference-less method to measure the transmission matrix (TM) of highly scattering materials.
- Employs a digital micromirror device (DMD) for spatial light modulation and a CCD camera for intensity-only measurements.
- Utilizes phase retrieval signal processing techniques to reconstruct the TM.
- Experimentally validated the method's accuracy using prediction quality, singular value distribution, and focusing quality.
AI-generated from the title and abstract; the full text is not read.
Abstract
This paper investigates experimental means of measuring the transmission matrix (TM) of a highly scattering medium, with the simplest optical setup. Spatial light modulation is performed by a digital micromirror device (DMD), allowing high rates and high pixel counts but only binary amplitude modulation. On the sensor side, without a reference beam, the CCD camera provides only intensity measurements. Within this framework, this paper shows that the TM can still be retrieved, through signal processing techniques of phase retrieval. This is experimentally validated on three criteria : quality of prediction, distribution of singular values, and quality of focusing.
The authors' abstract, as published at the source. Optics Express, 2015 · DOI ↗
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Field: Acoustics and Ultrasonics
Acoustics and UltrasonicsPhysics and Astronomy