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Spatial terahertz-light modulators for single-pixel cameras

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Ivanov Stantchev, Rayko and Pickwell-MacPherson, Emma (2022) Spatial terahertz-light modulators for single-pixel cameras. In: Borwen, You and Lu, Ja-Yu, (eds.) Terahertz Technology. IntechOpen. ISBN 9781839626128

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Official URL: http://dx.doi.org/10.5772/intechopen.96691

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Abstract

Terahertz imaging looks set to become an integral part of future applications from semiconductor quality control to medical diagnosis. This will only become a reality when the technology is sufficiently cheap and capabilities adequate to compete with others. Single-pixel cameras use a spatial light modulator and a detector with no spatial-resolution in their imaging process. The spatial-modulator is key as it imparts a series of encoding masks on the beam and the detector measures the dot product of each mask and the object, thereby allowing computers to recover an image via post-processing. They are inherently slower than parallel-pixel imaging arrays although they are more robust and cheaper, hence are highly applicable to the terahertz regime. This chapter dedicates itself to terahertz single-pixel cameras; their current implementations, future directions and how they compare to other terahertz imaging techniques. We start by outlining the competing imaging techniques, then we discuss the theory behind single-pixel imaging; the main section shows the methods of spatially modulating a terahertz beam; and finally there is a discussion about the future limits of such cameras and the concluding remarks express the authors’ vision for the future of single-pixel THz cameras.

Item Type: Book Item
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TR Photography
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Terahertz technology, Light modulators, Compressed sensing (Telecommunication) , Signal processing, Hadamard transform spectroscopy, Digital cameras
Journal or Publication Title: Terahertz Technology
Publisher: IntechOpen
ISBN: 9781839626128
Book Title: Terahertz Technology
Editor: Borwen, You and Lu, Ja-Yu
Official Date: 17 August 2022
Dates:
DateEvent
17 August 2022Published
DOI: 10.5772/intechopen.96691
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
14206717Research Grants Council, University Grants Committeehttp://dx.doi.org/10.13039/501100002920
14201415Research Grants Council, University Grants Committeehttp://dx.doi.org/10.13039/501100002920
ITS/371/16Innovation and Technology Commission - Hong KongUNSPECIFIED
EP/S021442/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
UNSPECIFIEDRoyal Societyhttp://dx.doi.org/10.13039/501100000288
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