Lock-in thermal IR imaging using a solid immersion lens

2006 ◽  
Vol 46 (9-11) ◽  
pp. 1508-1513 ◽  
Author(s):  
O. Breitenstein ◽  
F. Altmann ◽  
T. Riediger ◽  
D. Karg ◽  
V. Gottschalk
Keyword(s):  
Solid Immersion Lens ◽  
Ir Imaging ◽  
Lock In

Use of a Solid Immersion Lens for Thermal IR Imaging

2006 ◽  
Author(s):  
O. Breitenstein ◽  
F. Altmann ◽  
T. Riediger ◽  
D. Karg ◽  
V. Gottschalk
Keyword(s):  
Detection Limit ◽  
Spatial Resolution ◽  
Wavelength Range ◽  
Scattered Light ◽  
Operation Mode ◽  
Solid Immersion Lens ◽  
Front Side ◽  
Ir Camera ◽  
Ir Imaging ◽  
Lock In

Abstract A hemispherical silicon solid immersion lens (SIL) was used to improve the spatial resolution of front-side thermal IR imaging in lock-in mode. The bottom of the SIL was coneshaped to reduce the footprint of the SIL to the size of the imaged region. Caused by the lock-in operation mode, the detection limit improves by 2-3 orders of magnitude, and scattered light does not limit the image contrast. By using this SIL in combination with an IR camera working in the 3-5 μm wavelength range, a spatial resolution of 1.4 μm was obtained for thermal IR imaging. An automatic SIL positioning facility was constructed to place the SIL exactly in the center of the imaged region and to easily remove it after the detailed investigation.

Combining Refractive Solid Immersion Lens and Pulsed Laser Induced Techniques for Effective Defect Localization on Microprocessors

2008 ◽  
Author(s):  
A.C.T. Quah ◽  
S.H. Goh ◽  
V.K. Ravikumar ◽  
S.L. Phoa ◽  
V. Narang ◽  
...  
Keyword(s):  
Case Studies ◽  
Spatial Resolution ◽  
Failure Modes ◽  
Pulsed Laser ◽  
Detection Algorithm ◽  
Detection Sensitivity ◽  
Solid Immersion Lens ◽  
Defect Localization ◽  
Lock In

Abstract The spatial resolution and sensitivity of laser induced techniques are significantly enhanced by combining refractive solid immersion lens technology and laser pulsing with lock-in detection algorithm. Laser pulsing and lock-in detection enhances the detection sensitivity and removes the ‘tail’ artifacts due to amplifier ac-coupling response. Three case studies on microprocessor devices with different failure modes are presented to show that the enhancements made a difference between successful and unsuccessful defect localization.

Amplitude-Modulated Lock-In Vibrothermography for NDE of Polymers and Composites

1995 ◽  
Vol 7 (1) ◽  
pp. 215-228 ◽  
Author(s):  
J. Rantala ◽  
D. Wu ◽  
G. Busse
Keyword(s):  
Lock In

Lock-in in Business Organizations

2000 ◽  
Author(s):  
Lynda Woodman Keen
Keyword(s):  
Business Organizations ◽  
Lock In

A Raman signature of the incommensurate-commensurate phase transition (lock-in) in a crystalline monomer diacetylene : pTS

1982 ◽  
Vol 43 (5) ◽  
pp. 755-759 ◽  
Author(s):  
M. Bertault ◽  
M. Krauzman ◽  
M. Le Postollec ◽  
R.M. Pick ◽  
M. Schott
Keyword(s):  
Phase Transition ◽  
Commensurate Phase ◽  
Lock In

Examination of Measurement Method for Magnetostriction of Electrical Steel Sheet with Lock-in Amplifier

2012 ◽  
Vol 132 (11) ◽  
pp. 1033-1038
Author(s):  
Yuichiro Kai ◽  
Yuji Tsuchida ◽  
Takashi Todaka ◽  
Masato Enokizono
Keyword(s):  
Measurement Method ◽  
Steel Sheet ◽  
Electrical Steel ◽  
Lock In ◽  
Electrical Steel Sheet

Scoping Social Entrepreneurship in India: Organisation, Technology, and Collaboration

GIS Business ◽  
2007 ◽  
Vol 2 (1) ◽  
pp. 39-47
Author(s):  
Sunita Kumari ◽  
Bino Paul G.D.
Keyword(s):  
Social Development ◽  
Human Development ◽  
Social Entrepreneurship ◽  
Social Stratification ◽  
Poverty Reduction ◽  
Social Protection ◽  
Secondary Data ◽  
Non Profit ◽  
The Core ◽  
Lock In

We explore emerging contexts of social entrepreneurship in India. Social entrepreneurship is emerging as an important option in poverty reduction and social change wherein organizing societal responses to scenarios like entrenched deprivation, cumulative disadvantages, long extant institutional lock-in, and vulnerabilities enmeshed in social stratification, hiatus emanating from segmentation of labour market and inadequate coverage of social protection form the core of strategies/collectives/organisation. In this paper, first, drawing cues from the literature, we outline basic typology of social entrepreneurship while delineating pivotal role technology and collaboration play in social entrepreneurship. Second, we provide a glimpse of not profit organisations in India, based on the secondary data. We juxtapose select patterns from the data on non profit organisations with human development. Third, we discuss select cases of social entrepreneurship that diverge in characteristics and contexts, in particular how these initiatives work towards poverty reduction and social development.

Parameters in lock-in thermography of CFRP laminates

2016 ◽  
Vol 58 (1) ◽  
pp. 31-35
Author(s):  
Philipp Myrach ◽  
Christiane Maierhofer ◽  
Markus Rahammer ◽  
Marc Kreutzbruck
Keyword(s):  
Cfrp Laminates ◽  
Lock In
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