TY - JOUR
T1 - A high-density multi-point LAPS set-up using a VCSEL array and FPGA control
AU - Wagner, Torsten
AU - Werner, Carl Frederik B.
AU - Miyamoto, Ko Ichiro
AU - Schöning, Michael J.
AU - Yoshinobu, Tatsuo
N1 - Funding Information:
The authors gratefully thank the Japan Society for the Promotion of Science (JSPS), as well as the “Fachagentur für Nachwachsende Rohstoffe e.V.” (FNR) and the Federal Ministry of Food, Agriculture and Consumer Protection (BMELV) of Germany for the financial support (Bio-LAPS).
Funding Information:
Torsten Wagner was born in Mönchengladbach, Germany, in 1978. He received his diploma in 2003 in electrical engineering from the University of Applied Sciences Aachen, his master of science in 2003 in model simulation and control from the Coventry University in UK, and his doctoral degree (PhD) in 2008 from the Philipps University Marburg in cooperation with the University of Applied Sciences Aachen. His research subjects concern chemical sensors, especially the light-addressable potentiometric sensor and sensor-signal processing. Since 2008, he is working under a scholarship from the Japanese Society for the Promotion of Sciences (JSPS) at the Tohoku University in Japan.
Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/6/20
Y1 - 2011/6/20
N2 - A new LAPS (light-addressable potentiometric sensor) set-up will be introduced, in which the light sources are miniaturised by the utilisation of a VCSEL (vertical-cavity surface-emitting laser) array to increase the measurement spot density. An FPGA (field-programmable gate array) is used to generate modulation signals for individual illumination of each measurement spot of the LAPS. The new set-up can operate a large number of measurement spots simultaneously by reading out the sum photocurrent and separate the signals of the individual measurement spots by an FFT analysis. The frequency, amplitude and offset of the modulation signal can be configured for each measurement spot by software. The new system can be combined with a positioning stage allowing the parallel read out of a single line of measurement spots and a scan perpendicular to that line in a similar manner, like for an optical scanner set-up. First measurements demonstrate the functionality of the new LAPS set-up as a chemical imaging system.
AB - A new LAPS (light-addressable potentiometric sensor) set-up will be introduced, in which the light sources are miniaturised by the utilisation of a VCSEL (vertical-cavity surface-emitting laser) array to increase the measurement spot density. An FPGA (field-programmable gate array) is used to generate modulation signals for individual illumination of each measurement spot of the LAPS. The new set-up can operate a large number of measurement spots simultaneously by reading out the sum photocurrent and separate the signals of the individual measurement spots by an FFT analysis. The frequency, amplitude and offset of the modulation signal can be configured for each measurement spot by software. The new system can be combined with a positioning stage allowing the parallel read out of a single line of measurement spots and a scan perpendicular to that line in a similar manner, like for an optical scanner set-up. First measurements demonstrate the functionality of the new LAPS set-up as a chemical imaging system.
KW - Biosensor
KW - Chemical imaging
KW - FPGA
KW - Field effect
KW - LAPS
KW - Light-addressable potentiometric sensor
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U2 - 10.1016/j.snb.2010.03.009
DO - 10.1016/j.snb.2010.03.009
M3 - Article
AN - SCOPUS:79955665490
VL - 154
SP - 124
EP - 128
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
SN - 0925-4005
IS - 2
ER -