Analysis of the light—beam scattering and the sum and differential signal output by arbitrarily shaped pits and bosses

1989 ◽  
Vol 72 (5) ◽  
pp. 37-47 ◽  
Author(s):  
Yuji Funabiki ◽  
Toshitaka Kojima
Keyword(s):  
Light Beam ◽  
Differential Signal ◽  
Beam Scattering ◽  
Signal Output

Light beam scattering on ring layer of spherical heterogeneities of GI-POF core to wavequide TE-modes

2016 ◽  
Author(s):  
Alexander A. Shibelgut ◽  
Dmitry A. Konkin ◽  
Rahim A. A. Rahim ◽  
Rudol'ph V. Litvinov ◽  
Oleg V. Stukach
Keyword(s):  
Light Beam ◽  
Beam Scattering

Differential Forces within the Proximal Patellar Tendon as an Explanation for the Characteristic Lesion of Patellar Tendinopathy

2008 ◽  
Vol 36 (11) ◽  
pp. 2119-2127 ◽  
Author(s):  
Edwin Mark Dillon ◽  
Pieter J. Erasmus ◽  
Jacobus H. Müller ◽  
Cornie Scheffer ◽  
Richard V. P. de Villiers
Keyword(s):  
Patellar Tendon ◽  
Posterior Region ◽  
Anterior Region ◽  
Patellar Tendinopathy ◽  
Optic Fiber ◽  
Transverse Strain ◽  
Kinetic Chain ◽  
Differential Signal ◽  
Jump Exercise ◽  
Signal Output

Background Patellar tendinopathy is a common condition affecting the posterior region of the proximal patellar tendon, but the reason for this typical location remains unclear. Hypothesis The posterior region of the proximal patellar tendon is subjected to greater tendinous forces than is the corresponding anterior region. Study Design Descriptive laboratory study. Method An optic fiber technique was used to detect forces in both the anterior and the posterior regions of the proximal patellar tendon in 7 healthy persons. The optic fiber force sensor works on the principle of the amplitude modulation of transmitted light when the optic fiber is geometrically altered owing to the forces acting on it. Longitudinal strain in the tendon or ligament produces a negative transverse strain, thus causing a force that effectively squeezes the optic fiber. Measurements were recorded during the following exercises: closed kinetic chain quadriceps contraction (eccentric and concentric), open kinetic chain quadriceps contraction (eccentric and concentric), a step exercise, and a jump exercise. Results During all the exercises, the peak differential signal output in the posterior location of the proximal patellar tendon was greater than in the corresponding anterior location. The greatest differential signal output was found in the jump and squat exercises. Conclusion The posterior region of the proximal patellar tendon is subjected to greater tendinous forces than is the corresponding anterior region. This finding supports the tensile-overload theory of patellar tendinopathy. Clinical Relevance Jump activities and deep squat exercises expose the patellar tendon to very large tendinous forces.

3D FDTD Method Analysis of Light-beam Scattering from a RAD-MSR Disk Models

PIERS Online ◽  
2009 ◽  
Vol 5 (3) ◽  
pp. 291-296
Author(s):  
Di Yang ◽  
Akira Yokoyama ◽  
Toshitaka Kojima
Keyword(s):  
Light Beam ◽  
Fdtd Method ◽  
Beam Scattering ◽  
Method Analysis

DUAL LIGHT BEAM MODULATION OF PHOTOCARRIER LIFETIME IN INTRINSIC a-Si:H

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-597-C4-600 ◽  
Author(s):  
P. D. Persans ◽  
H. Fritzsche
Keyword(s):  
Light Beam ◽  
Beam Modulation
Sign in / Sign up

Export Citation Format

Share Document