Polarization imaging using active illumination and lock-in like algorithms

2003 ◽  
Author(s):  
Matthew Gypson ◽  
Michael Dobbs ◽  
Jeff Pruitt ◽  
Benjamin Neff ◽  
Judy Fennelly
Keyword(s):  
Polarization Imaging ◽  
Active Illumination ◽  
Lock In

Differential polarization imaging of sickled cells

1988 ◽  
Vol 46 ◽  
pp. 62-63
Author(s):  
Marcos F. Maestre
Keyword(s):  
Optical Properties ◽  
Theoretical Approach ◽  
Polarized Light ◽  
Polarization Microscopy ◽  
Spectroscopic Techniques ◽  
Polarization Imaging ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Microscopic Scale ◽  
Chiral Structures

Recently we have developed a form of polarization microscopy that forms images using optical properties that have previously been limited to macroscopic samples. This has given us a new window into the distribution of structure on a microscopic scale. We have coined the name differential polarization microscopy to identify the images obtained that are due to certain polarization dependent effects. Differential polarization microscopy has its origins in various spectroscopic techniques that have been used to study longer range structures in solution as well as solids. The differential scattering of circularly polarized light has been shown to be dependent on the long range chiral order, both theoretically and experimentally. The same theoretical approach was used to show that images due to differential scattering of circularly polarized light will give images dependent on chiral structures. With large helices (greater than the wavelength of light) the pitch and radius of the helix could be measured directly from these images.

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

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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