scholarly journals Exposure time dependence of image quality in high-speed retinal in vivo Fourier domain OCT

2005 ◽  
Author(s):  
Robert J. Zawadzki ◽  
Bradley A. Bower ◽  
Mingtao Zhao ◽  
Marinko Sarunic ◽  
Sophie Laut ◽  
...  
Keyword(s):  
Image Quality ◽  
Time Dependence ◽  
Exposure Time ◽  
High Speed ◽  
Fourier Domain ◽  
Fourier Domain Oct

Adaptive-Optics High-Resolution and High-Speed Retinal in vivo Fourier-Domain OCT

2005 ◽  
Author(s):  
Robert J. Zawadzki ◽  
Sophie Laut ◽  
John S. Werner ◽  
Steven M. Jones ◽  
Scott S. Olivier ◽  
...  
Keyword(s):  
High Resolution ◽  
Adaptive Optics ◽  
High Speed ◽  
Fourier Domain ◽  
Fourier Domain Oct

High-speed frequency-swept light source at 1550-nm for Fourier domain OCT with A-scanning rate at 20kHz

2006 ◽  
Author(s):  
R. K. Wang ◽  
S. Cheung ◽  
P. H. Tomlins ◽  
C. Chong ◽  
A. Morosawa ◽  
...  
Keyword(s):  
Light Source ◽  
High Speed ◽  
Fourier Domain ◽  
Scanning Rate ◽  
Fourier Domain Oct

In vivo high power infrared radiation exposure time dependence of lens light scattering

2008 ◽  
Vol 86 ◽  
pp. 0-0
Author(s):  
R AL-SAQRY ◽  
K GALICHANIN ◽  
Y LI ◽  
PG SÖDERBERG ◽  
K SCHULMEISTER ◽  
...  
Keyword(s):  
Light Scattering ◽  
Time Dependence ◽  
Radiation Exposure ◽  
Exposure Time ◽  
High Power ◽  
Infrared Radiation

Three-dimensional measurement by high-speed line-field Fourier-domain optical coherence tomography in vivo

2006 ◽  
Author(s):  
Shuichi Makita ◽  
Yosifumi Nakamura ◽  
Yoshiaki Yasuno ◽  
Takashi Endo ◽  
Masahiro Yamanari ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
High Speed ◽  
Three Dimensional ◽  
Fourier Domain ◽  
Optical Coherence ◽  
Line Field ◽  
Dimensional Measurement ◽  
Three Dimensional Measurement

Analysis of in vitro and in vivo bidirectional flow velocities by phase-resolved Doppler Fourier-domain OCT

2009 ◽  
Vol 156 (1) ◽  
pp. 14-21 ◽  
Author(s):  
Julia Walther ◽  
Gregor Mueller ◽  
Henning Morawietz ◽  
Edmund Koch
Keyword(s):  
Fourier Domain ◽  
Fourier Domain Oct ◽  
Bidirectional Flow ◽  
Flow Velocities

scholarly journals Design and Optimization of a Linear Wavenumber Spectrometer with Cylindrical Optics for Line Scanning Optical Coherence Tomography

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6463
Author(s):  
Sevin Samadi ◽  
Javad Dargahi ◽  
Sivakumar Narayanswamy
Keyword(s):  
Optical Coherence Tomography ◽  
Image Quality ◽  
High Speed ◽  
High Efficiency ◽  
Optical Design ◽  
Optical Coherence ◽  
High Speed Imaging ◽  
Nonlinearity Error ◽  
Line Scanning

We report the design of a high-efficiency spectral-domain spectrometer with cylindrical optics for line scanning optical coherence tomography (OCT). The spectral nonlinearity in k space (wavenumber) lowers the depth-dependent signal sensitivity of the spectrometers. For linearizing, in this design, grating and prism have been introduced. For line scanning, a cylindrical mirror is utilized in the scanning part. Line scanning improves the speed of imaging compared to fly-spot scanning. Line scanning OCT requires a spectrometer that utilizes cylindrical optics. In this work, an optical design of a linear wavenumber spectrometer with cylindrical optics is introduced. While there are many works using grating and prism to linearize the K space spectrometer design, there is no work on linearizing the k-space spectrometer with cylindrical optics for line scanning that provides high sensitivity and high-speed imaging without the need for resampling. The design of the spectrometer was achieved through MATLAB and ZEMAX simulations. The spectrometer design is optimized for the broadband light source with a center wavelength of 830 ± 100 nm (8.607 μm−1− 6.756 μm−1 in k-space). The variation in the output angle with respect to the wavenumber can be mentioned as a nonlinearity error. From our design results, it is observed that the nonlinearity error reduced from 147.0115 to 0.0149 Δθ*μm within the wavenumber range considered. The use of the proposed reflective optics for focusing reduces the chromatic aberration and increases image quality (measured by the Strehl ratio (SR)). The complete system will provide clinicians a powerful tool for real-time diagnosis, treatment, and guidance in surgery with high image quality for in-vivo applications.

scholarly journals In vivo imaging of the human cornea with high-speed and high-resolution Fourier-domain full-field optical coherence tomography

2020 ◽  
Vol 11 (5) ◽  
pp. 2849 ◽  
Author(s):  
Egidijus Auksorius ◽  
Dawid Borycki ◽  
Patrycjusz Stremplewski ◽  
Kamil Liżewski ◽  
Slawomir Tomczewski ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
High Resolution ◽  
In Vivo Imaging ◽  
High Speed ◽  
Fourier Domain ◽  
Human Cornea ◽  
Optical Coherence ◽  
Full Field
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