Total internal reflection of a Gaussian light beam

1999 ◽  
Vol 44 (4) ◽  
pp. 417-421
Author(s):  
P. D. Kukharchik ◽  
V. M. Serdyuk ◽  
I. A. Titovitskii
Keyword(s):  
Light Beam ◽  
Total Internal Reflection ◽  
Internal Reflection

scholarly journals Light beam output from diamond-shaped total-internal reflection modes by using intracavity air gaps

2007 ◽  
Vol 15 (25) ◽  
pp. 17392 ◽  
Author(s):  
Takehiro Fukushima ◽  
Susumu Shinohara ◽  
Takahisa Harayama
Keyword(s):  
Light Beam ◽  
Total Internal Reflection ◽  
Internal Reflection ◽  
Air Gaps ◽  
Beam Output

Total internal reflection of pulsed light beam upon ideal non-absorbing plasma

2012 ◽  
Vol 59 (7) ◽  
pp. 643-649
Author(s):  
Xiangmin Liu ◽  
Yan Shi ◽  
Pengfei Zhu ◽  
Yanli Zhang ◽  
Qingfen Yang
Keyword(s):  
Light Beam ◽  
Total Internal Reflection ◽  
Internal Reflection ◽  
Pulsed Light

Non-Intrusive Unilateral Measurements of Void Incidence Within a Microchannel

2007 ◽  
Author(s):  
Douglas Heymann ◽  
Jordan Young ◽  
Ruander Cardenas
Keyword(s):  
Data Acquisition ◽  
Light Beam ◽  
Void Fraction ◽  
Vapor Bubble ◽  
Total Internal Reflection ◽  
Critical Angle ◽  
Optical Probe ◽  
Internal Reflection ◽  
Continuous Data ◽  
Two Phase

Void fraction measurements are used to characterize two-phase flow within a microchannel. Limitations of typical void fraction measurement systems include disruption of the flow (intrusive optical probe) and non-continuous data acquisition. Using the principles of total internal reflection, a Non-Intrusive Void Incidence Sensor (NIVIS) has been developed to determine the void incidence (frequency of a vapor bubble passing a known position in the channel). Continuous data can be recorded with a typical computer. A light beam is introduced through a fiber optic to the outside of a transparent channel wall at a critical angle. This critical angle is designed such that when a vapor bubble is present at the specified location, total internal reflection will occur. An output fiber is fixed in a determined position to receive light in the case of total internal reflection. Without the presence of a vapor bubble, the light beam will be reflected past the output fiber. A substantial increase in output signal is noticed when total internal reflection occurs. Characteristics of the NIVIS, proven during non-intrusive testing, include: continuous data acquisition of bubble incidences, measurements within a 100 micron wide channel, and bubble boundary differentiation.

Comparison of sensitivity of the refractometric methods of frustrated total internal reflection and surface plasmon resonance

2020 ◽  
pp. 44-49
Author(s):  
I. N. Pavlov
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Total Internal Reflection ◽  
Resonance Method ◽  
Internal Reflection ◽  
Optical Methods ◽  
Thin Boundary Layer ◽  
Experimental Conditions ◽  
Frustrated Total Internal Reflection

Two optical methods, namely surface plasmon resonance imaging and frustrated total internal reflection, are described in the paper in terms of comparing their sensitivity to change of refractive index of a thin boundary layer of an investigated medium. It is shown that, despite the fact that the theoretically calculated sensitivity is higher for the frustrated total internal reflection method, and the fact that usually in practice the surface plasmon resonance method, on the contrary, is considered more sensitive, under the same experimental conditions both methods show a similar result.

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