scholarly journals Low dispersion integrated Michelson interferometer on silicon on insulator for optical coherence tomography

2011 ◽  
Author(s):  
Gunay Yurtsever ◽  
Katarzyna Komorowska ◽  
Roel Baets
Keyword(s):  
Optical Coherence Tomography ◽  
Michelson Interferometer ◽  
Silicon On Insulator ◽  
Optical Coherence ◽  
Low Dispersion

scholarly journals Investigation of Light Parameters on Image Quality and Optical Coherence Tomography

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Boka Fikadu ◽  
Bulcha Bekele ◽  
Leta Tesfaye Jule ◽  
Anatol Degefa ◽  
N. Nagaprasad ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Image Quality ◽  
Time Domain ◽  
Glass Sample ◽  
Michelson Interferometer ◽  
Signal Strength ◽  
Optical Coherence ◽  
Time Domain Signal ◽  
Significant Difference ◽  
The Time Domain

In this work, image quality and optical coherence tomography were studied. The results of the study show that there is a very significant difference between ultrasound and optical coherence tomography to produce an image with a different wave. To understand this, we studied the basic principle of optical coherence tomography in the Michelson interferometer using monochromatic and broadband sources. Time-domain and spectral-domain measurements, which exist at the detector level, are briefly described using a glass sample. The time-domain signal strength of the Michelson interferometer using a broadband source is a Gaussian envelope.

Extended measuring depth dual-wavelength Fourier domain optical coherence tomography

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Haroun Al-Mohamedi ◽  
Ismael Kelly-Pérez ◽  
Theo Oltrup ◽  
Alan Cayless ◽  
Thomas Bende
Keyword(s):  
Optical Coherence Tomography ◽  
Wide Spectrum ◽  
Michelson Interferometer ◽  
Dual Band ◽  
Human Model ◽  
Optical Coherence ◽  
Reference Mirror ◽  
Pass Filter ◽  
Wide Range ◽  
Sd Oct

Abstract In this work an enhanced wide range dual band spectral domain optical coherence tomography technique (SD-OCT) is presented to increase the depth and accuracy of the measurement of optical A-scan biometry. The setup uses a Michelson interferometer with two wide-spectrum Superluminescent Diodes (SLD). The emissions of the SLDs are filtered by a long-pass filter (900 nm) in front of the reference mirror. The light is spectrally decomposed using a single reflective diffraction grating (1,800 lines/mm) and the whole spectrum captured with two CCD line sensors. The capabilities of the system have been validated using a self-made human model eye.

Infrared Optical Path Adjustment Method for Common-Path Optical Coherence Tomography

2012 ◽  
Vol 546-547 ◽  
pp. 531-536
Author(s):  
Yan Jun Li ◽  
Zhong Dong Liu ◽  
Yi Nan Zhang ◽  
Hai Xiao
Keyword(s):  
Optical Coherence Tomography ◽  
Michelson Interferometer ◽  
Glass Tube ◽  
Biological Tissues ◽  
Optical Path ◽  
Optical Coherence ◽  
Cross Sectional ◽  
Adjustment Method ◽  
Common Path

A new, common-path, in-axis concentric beam-splitting Michelson interferometer is demonstrated for optical coherence tomography (OCT), which can be used to perform high-resolution cross-sectional in vivo and in situ imaging of biological tissues. A piece of glass tube with its inner diameter smaller than the beam-width of the collimated light is used to split the light into a reference and sample beam. In order to obtain the optimal spectral interferogram of this OCT system, an infrared optical path adjustment method was introduced in this paper.

A wafer-level miniaturized Michelson interferometer on glass substrate for optical coherence tomography applications

2016 ◽  
Vol 242 ◽  
pp. 210-216 ◽  
Author(s):  
M.J. Maciel ◽  
C.G. Costa ◽  
M.F. Silva ◽  
A.C. Peixoto ◽  
R.F. Wolffenbuttel ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Glass Substrate ◽  
Michelson Interferometer ◽  
Optical Coherence ◽  
Wafer Level

scholarly journals All-optically integrated photoacoustic and optical coherence tomography: A review

2017 ◽  
Vol 10 (04) ◽  
pp. 1730006 ◽  
Author(s):  
Wei Qiao ◽  
Zhongjiang Chen
Keyword(s):  
Optical Coherence Tomography ◽  
Biomedical Imaging ◽  
Imaging System ◽  
Michelson Interferometer ◽  
Optical Coherence ◽  
Dual Mode ◽  
Imaging Technology ◽  
Fabry Perot ◽  
All Optical ◽  
Potential Applications

All-optically integrated photoacoustic (PA) and optical coherence tomography (OCT) dual-mode imaging technology that could offer comprehensive pathological information for accurate diagnosis in clinic has gradually become a promising imaging technology in the aspect of biomedical imaging during the recent years. This review refers to the technology aspects of all-optical PA detection and system evolution of optically integrated PA and OCT, including Michelson interferometer dual-mode imaging system, Fabry–Perot (FP) interferometer dual-mode imaging system and Mach–Zehnder interferometer dual-mode imaging system. It is believed that the optically integrated PA and OCT has great potential applications in biomedical imaging.

scholarly journals Spectroscopic Optical Coherence Tomography for Thin Layer and Foil Measurements

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5653
Author(s):  
Aleksandra M. Kamińska ◽  
Marcin R. Strąkowski ◽  
Jerzy Pluciński
Keyword(s):  
Optical Coherence Tomography ◽  
Thin Layer ◽  
Michelson Interferometer ◽  
High Sensitivity ◽  
Thin Foil ◽  
Thin Layers ◽  
Optical Coherence ◽  
Minimum Value ◽  
Proposed Model ◽  
Fabry Perot

The main goal of this research was to assess if it is possible to evaluate the thickness of thin layers (both thin films on the surface and thin layers below the surface of the tested object) and foils using optical coherence tomography (OCT) for thickness assessment under the resolution of the standard commercially available OCT measurement system. In the proposed solution, light backscattered from the evaluated thin layer has been expressed as a multiple beam interference. Therefore, the OCT system was modeled as a two-beam interferometer (e.g., Michelson), in which one beam propagates from the reference arm and the other comes from a Fabry–Pérot interferometer. As a consequence, the mathematical model consists of the main Michelson interferometer, in which the measuring arm represents the Fabry–Pérot interferometer. The parameters of the layer (or foil) are evaluated by analyzing the minimum value of the interference contrast. The model developed predicts the behavior of the thin layers made from different materials (with different refractive indexes) with different thickness and located at different depths. To verify the correctness of the proposed model, an experiment with a wedge cell has been carried out. The wedge cell was shifted across the scanning beam using a linear translation stage with a micrometer screw under the scanning head. The relationship between the thickness of the gap of the wedge cell and the OCT output signal is presented. For the additional verification of the proposed model, the results of the measurements of the thickness of the thin foil were compared with the theoretical results of the simulations. The film thickness was evaluated based on the calculated positions of the minimum value of interference contrast. A combination of the standard potentialities of OCT with the proposed approach to analyzing the signal produces new metrological possibilities. The method developed allows us to evaluate thickness under the resolution of the system and the location of the layer as well. This produces the possibility of measuring a layer which is covered by another layer. Moreover, it is possible to create a thickness map with high sensitivity to thickness changes. These experiments and simulations are the culmination of preliminary research for evaluating the potential of the proposed measurement method.

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