Characterization of ink-jet printed RGB color filters with spectral domain optical coherence tomography

Czajkowski, Jakub; Vilmi, Pauliina; Lauri, Janne; Śliz, Rafal; Fabritius, Tapio; Myllylä, Risto

doi:10.1117/12.929681

Cited by 6 publications

(3 citation statements)

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“…Here, a laboratory-built spectral domain DOCT device was used; the detailed device description can be found in refs. [24,25]. This device has an axial resolution of 0.9 µm in water.…”

Section: Methodsmentioning

confidence: 99%

Rheological and Flocculation Analysis of Microfibrillated Cellulose Suspension Using Optical Coherence Tomography

et al. 2018

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A sub-micron resolution optical coherence tomography device was used together with a pipe rheometer to analyze the rheology and flocculation dynamics of a 0.5% microfibrillated cellulose (MFC) suspension. The bulk behavior of the MFC suspension showed typical shear thinning (power-law) behavior. This was reflected in a monotonously decreasing floc size when the shear stress exceeded the yield stress of the suspension. The quantitative viscous behavior of the MFC suspension changed abruptly at the wall shear stress of 10 Pa, which was reflected in a simultaneous abrupt drop of the floc size. The flocs were strongly elongated with low shear stresses. With the highest shear stresses, the flocs were almost spherical, indicating a good level of fluidization of the suspension.

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“…Here, a laboratory-built spectral domain DOCT device was used; the detailed device description can be found in refs. [24,25]. This device has an axial resolution of 0.9 µm in water.…”

Section: Methodsmentioning

confidence: 99%

Rheological and Flocculation Analysis of Microfibrillated Cellulose Suspension Using Optical Coherence Tomography

et al. 2018

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“…The laboratory-built spectral domain OCT device 17,18 employs an integrated supercontinuum light source (SuperK Extreme EXB-1, NKT Photonics). The spectrum range from 450 to 800 nm was used for imaging.…”

Section: Methodsmentioning

confidence: 99%

Quantification of cell-free layer thickness and cell distribution of blood by optical coherence tomography

2016

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Abstract. A high-speed optical coherence tomography (OCT) with 1-μm axial resolution was applied to assess the thickness of a cell-free layer (CFL) and a spatial distribution of red blood cells (RBC) next to the microchannel wall. The experiments were performed in vitro in a plain glass microchannel with a width of 2 mm and height of 0.2 mm. RBCs were suspended in phosphate buffered saline solution at the hematocrit level of 45%. Flow rates of 0.1 to 0.5 ml∕h were used to compensate gravity induced CFL. The results indicate that OCT can be efficiently used for the quantification of CFL thickness and spatial distribution of RBCs in microcirculatory blood flow.

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“…In principle, WSI has lot of common with another 3D imaging technique, called optical coherence tomography (OCT) [8]. Beyond OCT's major application field in ophthalmology, it has emerged as a powerful tool in nondestructive testing of various types samples including microfluidics [9][10][11], displays [12], LEDs [13], printed electronics [14][15][16][17] and art work [18]. Development of high speed OCTs have led to two variants, the one is based on wavelength scanning (swept-source OCT) and the other is based on acquiring the whole spectrum at a single shot J.L is partially supported by European Regional Development Fund (project: PrintoCent10, no.…”

Section: Introductionmentioning

confidence: 99%

Wavelength Scanning Interferometry for Topography of Microchannels at Roll-to-Roll Line with Optical Coherence Tomography

Lauri

Liedert

Fabritius

2021

2021 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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Roll-to-roll (R2R) process is mass manufacturing method that can produce various products ranging from printed electronics to microfluidics. Microfluidics, used in biosensors, demands high tolerances and quality to guarantee correct functionality of sensors. In this work, optical coherence tomography device was installed at the R2R-line to measure the height and width of the hot embossed microchannel structures at speed of 1m/min. The repeating channel structure on the 10 m long sample web was measured at 1m interval. An algorithm, typically used in wavelength scanning interferometry (WSI), is utilized to recover topography at nanometer scale. The results showed that the R2R hot embossing process was very stable and predictable. If process parameters, for instance pressure at the hot embossing unit was increased, it resulted deeper channels as expected. The OCT, with the WSI algorithm, provides topography of microchannel at nanometer scale being thus an excellent tool for optimization of process parameters and for on-line quality control.

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Characterization of ink-jet printed RGB color filters with spectral domain optical coherence tomography

Cited by 6 publications

References 0 publications

Rheological and Flocculation Analysis of Microfibrillated Cellulose Suspension Using Optical Coherence Tomography

Rheological and Flocculation Analysis of Microfibrillated Cellulose Suspension Using Optical Coherence Tomography

Quantification of cell-free layer thickness and cell distribution of blood by optical coherence tomography

Wavelength Scanning Interferometry for Topography of Microchannels at Roll-to-Roll Line with Optical Coherence Tomography

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