Refine
Year of publication
Document Type
Language
- English (35) (remove)
Has Fulltext
- no (35)
Is part of the Bibliography
- no (35) (remove)
Keywords
- Microelectronics (6)
- fluorescence (6)
- Fluorescence lifetime imaging (5)
- Diode lasers (4)
- Phase shift (4)
- Fluorescence (3)
- Image processing algorithms (3)
- polymer (3)
- FD-FLIM (2)
- FLIM (2)
- Image processing (2)
- Stray light (2)
- fluorescence lifetime imaging (2)
- wood (2)
- ADC (1)
- Confocal laser scanning microscopy (1)
- Custom specific electronics (1)
- DDR4 SDRAM technology (1)
- DRAM Devices (1)
- DRAM Failure Analysis (1)
- DRAM retention solder simulation (1)
- Delta-Sigma (1)
- Electrooptical waveguides (1)
- Failure Analysis (1)
- Fourier transforms (1)
- ISC Measurements (1)
- Lasers and electrooptics (1)
- Loop transformation (1)
- MSP430 Launch Pad (1)
- MathWorks' HDL (1)
- Microcomputer (1)
- Microscopy (1)
- PV-Cell defects (1)
- Phase modulation (1)
- Photovoltaik (1)
- Plastics (1)
- Raman spectroscopy (1)
- Ultraviolet radiation (1)
- Xilinx XC9572XL CPLD (1)
- Zedboard (1)
- aircraft instrumentation (1)
- bandwidth (1)
- characterization (1)
- data acquisition (1)
- decay time (1)
- delta-sigma converter (1)
- effective resolution (1)
- fluorescence lifetime (1)
- functional verification (1)
- identification of plastics (1)
- lifetime (1)
- liquid crystal displays (1)
- mixed signal devices (1)
- model-based development (1)
- neural networks (1)
- parallelization (1)
- pattern analysis (1)
- plastic identification (1)
- plastic sorting (1)
- polymer identification (1)
- quantum efficiency (1)
- sensors (1)
- system simulation (1)
- wood species identification (1)
Institute
Today, the automatic separation of polymers from each other in an industrial scale is an unsolved problem. In laboratory environments, two methods are known whereby plastic is sorted either by color or by fluorescence decay time measurements that require fast synchronization and thus expensive equipment. A simple and pragmatic process is proposed to separate plastics from each other: all fluorescent photons are counted in relation to the absorbed photons. A theoretical model and an experimental setup are built in order to determine an apparatus specific quantum efficiency.
A Novel Approach to Identify Wood Species Optically using Fluorescence Lifetime Imaging Microscopy
(2021)
This contribution presents the results obtained with fluorescence lifetime imaging microscopy (FLIM)within the optical identification and differentiation of the four wood species walnut, beech, spruce, and maple. The experimental setup as well as the evaluation algorithm, with which the experiments were carried out, is explained briefly.
A novel approach to optically distinguish plastics based on fluorescence lifetime measurements
(2020)
In medical and biological research, fluorescence lifetime measurements and fluorescence lifetime imaging is already a part of the standardized analysis procedures. As first investigations have shown, polymers can be identified using fluorescence lifetime imaging and an evaluation algorithm. Thus, this contribution pursues a novel approach for the direct differentiation of four polymers with fluorescence lifetime imaging. Therefore, the evaluation algorithm is extended to compare several fluorescence lifetime images to prove that a distinction is possible.
A novel approach to optically distinguish plastics based on fluorescence lifetime measurements
(2020)
A DDR2 SDRAM test setup implemented on the Griffin III ATE test system from HILEVEL Technologies is used to analyse the row hammer bug. Row hammer pattern experiments are compared to standard retention tests.
The analysis confirms that the row hammer effect is caused by a charge excitation process depending on the number of stress activation cycles. The stress has to occur in the local neighborhood of the cells under test.
Shallow impurity levels support the responsible charge carrier transport process in the used DDR2 SDRAM technology
In this contribution the frequency domain fluorescence lifetime imaging microscopy (FD-FLIM) technique is evaluated for post-consumer wood sorting. The fluorescence characteristics of several wood samples were determined, whereby two excitation wavelengths (405 and 488 nm) were used. The measured data were processed using algorithmic methods to identify the wood species and post-consumer wood category. With the excitation wavelength of 405 nm, 16 out of 19 samples could be correctly assigned to the corresponding post-consumer wood category by means of the fluorescence lifetimes. Thus, the experimental results revealed the high potential of the FD-FLIM technique for automated post-consumer wood sorting.
Nowadays, fluorescence lifetime measurements and the method of fluorescence lifetime imaging are already state of the art in biomedical research. Also first investigations show that polymers could be identified due to their endogenous fluorescent lifetime. Thus an approach of identifying polymers with fluorescence lifetime imaging is done in this contribution. Therefore, four different polymers are examined and evaluated with statistical methods in order to determine their specific fluorescence lifetimes.