A Simple High Precision Extinction Method for Measuring Refractive Index of Transparent Materials

2009 ◽  
pp. 31-31-7
Author(s):  
SF Nee ◽  
HE Bennett
Keyword(s):  
Refractive Index ◽  
High Precision ◽  
Transparent Materials

MCVM: MONTE CARLO MODELING OF PHOTON MIGRATION IN VOXELIZED MEDIA

2010 ◽  
Vol 03 (02) ◽  
pp. 91-102 ◽  
Author(s):  
TING LI ◽  
HUI GONG ◽  
QINGMING LUO
Keyword(s):  
Monte Carlo ◽  
Refractive Index ◽  
High Precision ◽  
Heterogeneous Media ◽  
Homogeneous Medium ◽  
Software Tool ◽  
Light Transport ◽  
Photon Migration ◽  
Monte Carlo Code ◽  
Monte Carlo Modeling

The Monte Carlo code MCML (Monte Carlo modeling of light transport in multi-layered tissue) has been the gold standard for simulations of light transport in multi-layer tissue, but it is ineffective in the presence of three-dimensional (3D) heterogeneity. New techniques have been attempted to resolve this problem, such as MCLS, which is derived from MCML, and tMCimg, which draws upon image datasets. Nevertheless, these approaches are insufficient because of their low precision or simplistic modeling. We report on the development of a novel model for photon migration in voxelized media (MCVM) with 3D heterogeneity. Voxel crossing detection and refractive-index-unmatched boundaries were considered to improve the precision and eliminate dependence on refractive-index-matched tissue. Using a semi-infinite homogeneous medium, steady-state and time-resolved simulations of MCVM agreed well with MCML, with high precision (~100%) for the total diffuse reflectance and total fractional absorption compared to those of tMCimg (< 70%). Based on a refractive-index-matched heterogeneous skin model, the results of MCVM were found to coincide with those of MCLS. Finally, MCVM was applied to a two-layered sphere with multi-inclusions, which is an example of a 3D heterogeneous media with refractive-index-unmatched boundaries. MCVM provided a reliable model for simulation of photon migration in voxelized 3D heterogeneous media, and it was developed to be a flexible and simple software tool that delivers high-precision results.

Temperature insensitive high-precision refractive-index sensor using two concatenated dual-resonance long-period gratings

2013 ◽  
Vol 38 (10) ◽  
pp. 1666 ◽  
Author(s):  
Saurabh Mani Tripathi ◽  
Wojtek J. Bock ◽  
Arun Kumar ◽  
Predrag Mikulic
Keyword(s):  
Refractive Index ◽  
High Precision ◽  
Refractive Index Sensor ◽  
Long Period ◽  
Long Period Gratings ◽  
Dual Resonance

Using minimum deviation of a secondary rainbow and its application to water analysis in a high-precision, refractive-index comparator for liquids

1997 ◽  
Vol 36 (22) ◽  
pp. 5552 ◽  
Author(s):  
Hiroyuki Hattori ◽  
Hirotugu Yamanaka ◽  
Hendrik Kurniawan ◽  
Sadahiro Yokoi ◽  
Kiichiro Kagawa
Keyword(s):  
Refractive Index ◽  
High Precision ◽  
Water Analysis ◽  
Minimum Deviation

Reflective grating interferometer for measuring the refractive index of transparent materials

1995 ◽  
Vol 118 (5-6) ◽  
pp. 491-494 ◽  
Author(s):  
S De Nicola ◽  
P Ferraro ◽  
A Finizio ◽  
G Pesce ◽  
G Pierattini
Keyword(s):  
Refractive Index ◽  
Grating Interferometer ◽  
Transparent Materials

High precision temperature‐ and energy‐dependent refractive index of GaAs determined from excitation of optical waveguide eigenmodes

1990 ◽  
Vol 57 (13) ◽  
pp. 1328-1330 ◽  
Author(s):  
S. R. Kisting ◽  
P. W. Bohn ◽  
E. Andideh ◽  
I. Adesida ◽  
B. T. Cunningham ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Waveguide ◽  
High Precision ◽  
Precision Temperature ◽  
Energy Dependent
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