scholarly journals Acousto-optic filtration in low-coherence spectral-domain interferometry

2021 ◽  
Vol 2127 (1) ◽  
pp. 012034
Author(s):  
L Burmak
Keyword(s):  
Michelson Interferometer ◽  
Depth Resolution ◽  
Measurement Range ◽  
Spectral Domain ◽  
Interference Signal ◽  
Optical Coherence ◽  
Basic Principles ◽  
Depth Measurement ◽  
Low Coherence ◽  
Low Coherence Interferometry

Abstract The basic principles of measurements in spectral-domain low coherence interferometry (optical coherence tomography, optical coherence microscopy) based on acousto-optic filtration are discussed. Relations for extracting information about sample’s spatial structure from a series of spectral interference images acquired with spectral tuning are given. The implementation of measurements in spectral domain using acousto-optic filtration is considered. The effect of the acousto-optic filter characteristics on depth measurement range and depth resolution is estimated. The results of modelling of the interference signal and experimental data obtained in the scheme with acousto-optic filtration of interfering beams at the output of Michelson interferometer are presented.

Measurement of ocular axial length using full-range spectral-domain low-coherence interferometry

2018 ◽  
Vol 16 (3) ◽  
pp. 031701
Author(s):  
Yi Wang Yi Wang ◽  
Liang Feng Liang Feng ◽  
Lida Zhu Lida Zhu ◽  
Hongxian Zhou Hongxian Zhou ◽  
Zhenhe Ma Zhenhe Ma
Keyword(s):  
Axial Length ◽  
Full Range ◽  
Spectral Domain ◽  
Low Coherence ◽  
Low Coherence Interferometry

A rapid method of measuring dispersion in low coherence interferometry and optical coherence tomography systems

2009 ◽  
Vol 12 (1) ◽  
pp. 015302 ◽  
Author(s):  
Alexander Meadway ◽  
Seyed Hamid Hosseiny Darbrazi ◽  
George Dobre ◽  
Richard B Rosen ◽  
Adrian Gh Podoleanu
Keyword(s):  
Optical Coherence Tomography ◽  
Rapid Method ◽  
Optical Coherence ◽  
Low Coherence ◽  
Low Coherence Interferometry

scholarly journals A Fluidic Biosensor Based on a Phase-Sensitive Low-Coherence Spectral-Domain Interferometer

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3757
Author(s):  
Cuixia Guo ◽  
Xiaojie Yang ◽  
Zhiyuan Shen ◽  
Jian-Ping Wu ◽  
Suyi Zhong ◽  
...  
Keyword(s):  
Protein A ◽  
Spectral Domain ◽  
Minimum Detectable Concentration ◽  
Interference Signal ◽  
Fiber Optic Probe ◽  
Scale Thickness ◽  
Common Path ◽  
Low Coherence ◽  
Detectable Concentration ◽  
Phase Sensitive

A phase-sensitive fluidic biosensor based on a spectral-domain low-coherence interferometer is presented in this paper. With a fiber optic probe employing the common-path interferometric configuration, subnanometric changes in thickness of the molecular layers can be detected through phase analysis of the acquired interference signal from the sensor surface. Advantages of this biosensor include its picometer-scale thickness sensitivity, 13.9-ms time response, and tolerance to the fluctuation in concentration of the target solution. The capabilities of this biosensor in monitoring specific molecular binding and recognizing specific molecular was successfully demonstrated by using the reactions between the molecules of protein A and IgG. The calculated minimum detectable concentration of IgG is 0.11 µg/mL.

scholarly journals From Light to Displacement: A Design Framework for Optimising Spectral-Domain Low-Coherence Interferometric Sensors for In Situ Measurement

2020 ◽  
Vol 10 (23) ◽  
pp. 8590
Author(s):  
Tom Hovell ◽  
Jon Petzing ◽  
Laura Justham ◽  
Peter Kinnell
Keyword(s):  
Spectral Domain ◽  
Design Framework ◽  
Object Surface ◽  
Low Coherence ◽  
Interferometric Sensors ◽  
Spectral Domain Oct ◽  
Low Coherence Interferometry ◽  
Definition Of ◽  
In Situ Metrology

Growing requirements for in situ metrology during manufacturing have led to an increased interest in optical coherence tomography (OCT) configurations of low coherence interferometry (LCI) for industrial domains. This paper investigates the optimisation of spectral domain OCT hardware and signal processing for such implementations. A collation of the underlying theory of OCT configured LCI systems from disparate sources linking the journey of the light reflected from the object surface to the definition of the measurand is presented. This is portrayed in an applicable, comprehensible design framework through its application to profilometry measurements for optimising system performance.

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