scholarly journals Spectrometer-based refractive index and dispersion measurement using low-coherence interferometry with confocal scanning

2018 ◽  
Vol 26 (3) ◽  
pp. 3604 ◽  
Author(s):  
Daniel Francis ◽  
Helen D. Ford ◽  
Ralph P. Tatam
Keyword(s):  
Refractive Index ◽  
Low Coherence ◽  
Low Coherence Interferometry ◽  
Dispersion Measurement ◽  
Confocal Scanning

Simultaneous Measurement of Refractive Index and Thickness of Transparent Plates by Low Coherence Interferometry

1997 ◽  
Vol 4 (4) ◽  
pp. 507-515 ◽  
Author(s):  
Masato Ohmi ◽  
Takehisa Shiraishi ◽  
Hideyuki Tajiri ◽  
Masamitsu Haruna
Keyword(s):  
Refractive Index ◽  
Simultaneous Measurement ◽  
Low Coherence ◽  
Low Coherence Interferometry

scholarly journals Spatially Resolved Cross-Linking Characterization by Imaging Low-Coherence Interferometry

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1152 ◽  
Author(s):  
Christopher Taudt ◽  
Bryan Nelsen ◽  
Elisabeth Rossegger ◽  
Sandra Schlögl ◽  
Edmund Koch ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Thickness ◽  
Information Acquisition ◽  
Cross Linking ◽  
Imaging Spectrometer ◽  
Low Coherence ◽  
Spatially Resolved ◽  
Low Coherence Interferometry ◽  
Error Estimations ◽  
Phase Data

A method to characterize cross-linking differences in polymers such as waveguide polymers has been developed. The method is based on the scan-free information acquisition utilizing a low-coherence interferometer in conjunction with an imaging spectrometer. By the introduction of a novel analyzing algorithm, the recorded spectral-phase data was interpreted as wavelength-dependent optical thickness which is matchable with the refractive index and therefore with the degree of cross-linking. In the course of this work, the method was described in its hardware and algorithmic implementation as well as in its accuracy. Comparative measurements and error estimations showed an accuracy in the range of 10−6 in terms of the refractive index. Finally, photo-lithographically produced samples with laterally defined cross-linking differences have been characterized. It could be shown, that differences in the optical thickness of ±1.5 μm are distinguishable.

Corneal group refractive index measurement using low-coherence interferometry

1998 ◽  
Author(s):  
Stephen R. Uhlhorn ◽  
Fabrice Manns ◽  
Hassan Tahi ◽  
Pascal O. Rol ◽  
Jean-Marie A. Parel
Keyword(s):  
Refractive Index ◽  
Refractive Index Measurement ◽  
Low Coherence ◽  
Low Coherence Interferometry ◽  
Index Measurement ◽  
Group Refractive Index

Needle-based refractive index measurement using low-coherence interferometry

2007 ◽  
Vol 32 (4) ◽  
pp. 385 ◽  
Author(s):  
Adam M. Zysk ◽  
Steven G. Adie ◽  
Julian J. Armstrong ◽  
Matthew S. Leigh ◽  
Alexandre Paduch ◽  
...  
Keyword(s):  
Refractive Index ◽  
Refractive Index Measurement ◽  
Low Coherence ◽  
Low Coherence Interferometry ◽  
Index Measurement
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