Optimization of SNR, sensitivity values by evaluating the relative spacing between the partial mirror and scanning reference mirror for multiple reference optical coherence tomography

2020 ◽  
Author(s):  
Anand Arangath ◽  
Kai Neuhaus ◽  
Yi Zhou ◽  
Sergey Alexandrov ◽  
Josh Hogan ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Reference Mirror ◽  
Relative Spacing ◽  
Multiple Reference

3D nondestructive testing system with an affordable multiple reference optical-delay-based optical coherence tomography

2015 ◽  
Vol 54 (18) ◽  
pp. 5634 ◽  
Author(s):  
Roshan Dsouza ◽  
Hrebesh M. Subhash ◽  
Kai Neuhaus ◽  
Josh Hogan ◽  
Carol Wilson ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Nondestructive Testing ◽  
Testing System ◽  
Optical Coherence ◽  
Optical Delay ◽  
Multiple Reference

Dermascope assisted interactive patient interface for multiple reference optical coherence tomography

2014 ◽  
Author(s):  
Roshan Dsouza ◽  
Hrebesh Subhash ◽  
Kai Neuhaus ◽  
Josh Hogan ◽  
Carol Wilson ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Multiple Reference ◽  
Patient Interface

scholarly journals Dermascope guided multiple reference optical coherence tomography

2014 ◽  
Vol 5 (9) ◽  
pp. 2870 ◽  
Author(s):  
Roshan Dsouza ◽  
Hrebesh Subhash ◽  
Kai Neuhaus ◽  
Josh Hogan ◽  
Carol Wilson ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Multiple Reference

Mobile Optical Coherence Tomography Sensor for Surface Layers Testing

2012 ◽  
Vol 518 ◽  
pp. 201-210
Author(s):  
Sławomir Tomczewski ◽  
Leszek Salbut
Keyword(s):  
Optical Coherence Tomography ◽  
Measurement Range ◽  
Optical Coherence ◽  
Surface Layers ◽  
Reference Mirror ◽  
Fringe Contrast ◽  
Contrast Analysis ◽  
Smart Pixel ◽  
Compact Design ◽  
Axial Scanning

In the paper the new type of mobile sensor based on optical coherence tomography is presented. For increasing the measurement range the special dynamic focusing system which moves imaging plane during axial scanning process is used. Therefore developed system allows focusing on measured layer. Additionally, for image analysis the special type of CMOS matrix (called smart-pixel camera), synchronized with a reference mirror transducer, is applied. Due to hardware realization of a fringe contrast analysis simultaneously in each pixel with high frequency, the time of measurement decreases significantly. These advantages together with a compact design allow the sensor to be used as the mobile device for measurements of surface topography, thickness of surface layers and subsurface defects detection in laboratory, workshop and out-door conditions. Calibration of the designed sensor and its application to the technological measurements of the sticker label layers are presented and discussed.

Comparing an FFT filter for multiple reference optical coherence tomography (MR-OCT) with an Chebychev and an elliptic filter

2017 ◽  
Author(s):  
Kai Neuhaus ◽  
Sergey Alexandrov ◽  
Roshan Dsouza ◽  
Sean O'Gorman ◽  
Hrebesh M. Subhash ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Elliptic Filter ◽  
Multiple Reference

Multiple reference optical coherence tomography (MR-OCT) system

2013 ◽  
Author(s):  
Martin Leahy ◽  
Josh Hogan ◽  
Carol Wilson ◽  
Hrebesh Subhash ◽  
Roshan Dsouza
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Multiple Reference

Voice coil based robust and miniature optical delay for multiple reference optical coherence tomography

2014 ◽  
Author(s):  
Roshan Dsouza ◽  
Hrebesh Subhash ◽  
Kai Neuhaus ◽  
Josh Hogan ◽  
Carol Wilson ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Optical Delay ◽  
Multiple Reference

Characterization of an amplified piezoelectric actuator for multiple-reference optical coherence tomography

2018 ◽  
Vol 57 (22) ◽  
pp. E142 ◽  
Author(s):  
Sean O’Gorman ◽  
Kai Neuhaus ◽  
Sergey Alexandrov ◽  
Josh Hogan ◽  
Carol Wilson ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Piezoelectric Actuator ◽  
Optical Coherence ◽  
Multiple Reference

scholarly journals Simultaneous en-face imaging of multiple layers with multiple reference optical coherence tomography

2017 ◽  
Vol 22 (08) ◽  
pp. 1 ◽  
Author(s):  
Kai Neuhaus ◽  
Seán O’Gorman ◽  
Paul M. McNamara ◽  
Sergey Alexandrov ◽  
Josh Hogan ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
En Face ◽  
Multiple Reference ◽  
En Face Imaging

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.

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