scholarly journals Interferometry Using Generalized Lock-in Amplifier (G-LIA): A Versatile Approach for Phase-Sensitive Sensing and Imaging

10.5772/66657 ◽  
2017 ◽  
Author(s):  
Aurélien Bruyant ◽  
Julien Vaillant ◽  
Tzu-Heng Wu ◽  
Yunlong Zhu ◽  
Yi Huang ◽  
...  
Keyword(s):  
Phase Sensitive ◽  
Lock In

Room-Temperature Near-Infrared Metastable Species Measured by Phase-Sensitive Lock-in and Fourier Transform Techniques

1998 ◽  
Vol 45 (4) ◽  
pp. 503-508 ◽  
Author(s):  
Pi-Tai Chou ◽  
Youn-Chan Chen ◽  
Shu-Juan Chen ◽  
Min-Zen Lee ◽  
Ching-Yen Wei ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Room Temperature ◽  
Near Infrared ◽  
Phase Sensitive ◽  
Lock In

Using of Lock-In Amplifier for Thermal Expansion Measurements of Solids

2008 ◽  
Vol 3 (4) ◽  
pp. 64-67
Author(s):  
Kamil R. Zhdanov ◽  
Evgeny B. Amitin ◽  
Ravil K. Zhdanov
Keyword(s):  
Thermal Expansion ◽  
Phase Sensitive ◽  
Lock In

This paper describes simple electrical scheme for dilatometric researching. Using phase-sensitive AC voltmeter SR830 and digital DC voltmeter Solartron 7061 give full set of requed data.

Weak Signal Detection System Based on Lock-in Amplifier Technology

2013 ◽  
Vol 389 ◽  
pp. 489-493
Author(s):  
Yong Lv ◽  
Chun Hui Niu ◽  
Yue Qiang Li ◽  
Qing Shan Chen ◽  
Xiao Ying Li ◽  
...  
Keyword(s):  
Signal Detection ◽  
Detection System ◽  
Signal To Noise Ratio ◽  
Weak Signal ◽  
Weak Signal Detection ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Phase Sensitive ◽  
Lock In

In order to detect the weak signal deeply buried in the noise, a weak signal detection system based on lock-in amplifier is proposed. The system includes the preamplifier circuit, active low pass filter circuit, AC amplifying circuit and phase sensitive demodulation circuit. Test results show that it can greatly increase the signal-to-noise ratio (SNR) up to 12.7db.

Versatile low‐cost digital lock‐in amplifier suitable for multichannel phase‐sensitive detection

1989 ◽  
Vol 60 (7) ◽  
pp. 2257-2259 ◽  
Author(s):  
S. Carrato ◽  
G. Paolucci ◽  
R. Tommasini ◽  
R. Rosei
Keyword(s):  
Low Cost ◽  
Sensitive Detection ◽  
Phase Sensitive ◽  
Phase Sensitive Detection ◽  
Lock In

Development of an Impedance Meter Based on a Digital Lock-In Amplifier with 4-Kelvin-Probe Electrodes

2021 ◽  
Vol 18 (4) ◽  
pp. 1171-1176
Author(s):  
Rafael da Silva Ferraz ◽  
Raiff Sales da Fonseca ◽  
Cláudio Bastos da Silva ◽  
Horácio Tertuliano Santos Filho
Keyword(s):  
Embedded System ◽  
Experimental Tests ◽  
Sensitive Detection ◽  
Signal Acquisition ◽  
Kelvin Probe ◽  
C Language ◽  
Phase Sensitive ◽  
Phase Sensitive Detection ◽  
Lock In ◽  
Mathematical Operations

In this paper, it is described a new design of a digital Lock-In amplifier applied to 4-Kelvin- probe electrodes for the measurement of complex electrical variables. The proposed design is based on the operation of a Phase Sensitive Detection (PSD) circuit and on signal acquisition by the Nyquist principle. The hardware basically consists of a programmable embedded system and an analog interfacing circuit. The microcontroller within the circuit was programmed using standard C language for portability and performs the acquisition of the resulting signal along with mathematical operations. Experimental tests on the prototype have shown that it performs as theoretically predicted.

Phase-sensitive lock-in imaging of surface densities of states

2005 ◽  
Vol 17 (1) ◽  
pp. 213-216 ◽  
Author(s):  
Martin Švec ◽  
Pingo Mutombo ◽  
Pavel Shukrinov ◽  
Viktor Dudr ◽  
Vladimír Cháb
Keyword(s):  
Densities Of States ◽  
Phase Sensitive ◽  
Lock In

scholarly journals Generalized lock-in detection for interferometry: application to phase sensitive spectroscopy and near-field nanoscopy

2014 ◽  
Vol 22 (18) ◽  
pp. 22232 ◽  
Author(s):  
A. Al Mohtar ◽  
J. Vaillant ◽  
Z. Sedaghat ◽  
M. Kazan ◽  
L. Joly ◽  
...  
Keyword(s):  
Near Field ◽  
Phase Sensitive ◽  
Lock In
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