Modeling Light Transfer through Optical Fibers for Illumination Applications

Saraiji, Riad; Mistrick, Richard G.; Modest, Michael F.

doi:10.1080/00994480.1996.10748154

Cited by 9 publications

(8 citation statements)

References 6 publications

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“…This principle has been utilized in calculating the light flux output of a light guide in terms of the flux input, using Monte Carlo ray-tracing. 10 These same r, u and 8 parameters have been used in ray-tracing studies of the role of skew rays in radiation leakage. 11 In large core cylindrical optical fibres, such as those used for illumination purposes, the ray input position, r, is an important parameter affecting ray propagation.…”

Section: Previous Methods: Undoped Light Guidesmentioning

confidence: 99%

Monte Carlo ray-tracing in particle-doped light guides

Deller

Franklin

Smith

2006

Lighting Research & Technology

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A general Monte Carlo ray-tracing method for light guides with particles randomly dispersed in a matrix material is presented. Previous ray-tracing approaches have been designed for undoped cylindrical light guides, where a propagating ray is deviated by total internal reflection only. These geometrical principles are extended and further developed into a method of ray-tracing suitable for particle-doped systems. Redefining ray direction after deviation by a particle, obtaining ray/wall intercept points and angles, and calculation of ray reflection angles from a cylindrical surface are described. Simulations of light from a source LED traced through TRIMM-doped (Transparent Refractive Index Matched MicroParticle) polymethyl methacrylate (PMMA) light guides have been performed. Distributions of the light exiting the walls of two concentrations of TRIMM-doped light guides are given, as an example of an application of the described ray-tracing method.

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Section: Previous Methods: Undoped Light Guidesmentioning

confidence: 99%

Monte Carlo ray-tracing in particle-doped light guides

Deller

Franklin

Smith

2006

Lighting Research & Technology

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“…Fresnel reflections on the head surfaces of the optical fiber, 2. absorption ofthe radiation in the core, 3. losses due to the fact that some of the energy carried by the energy flux will be absorbed in the cladding (the refraction on the core-cladding boundary), 4. losses resulting from imperfection of the total internal reflections at the core-cladding boundary.…”

Section: Energy Flux Losesmentioning

confidence: 99%

“…In order to use an optical fiber in photometers the fact that the light signal is sent in an analogue form over comparatively short distances (a few centimeters) must be taken into account. In view of this, when designing this type of photometer losses of energy flux depending on the angle of incidence of the beam on the optical fiber head and changes in the spectral composition ofthe light passing through the optical fiber are of significance [1,2,3]. There are very few papers dealing with this problem and the results published are usually based solely on digital simulation [1,3].…”

Section: Introductionmentioning

confidence: 99%

“…In view of this, when designing this type of photometer losses of energy flux depending on the angle of incidence of the beam on the optical fiber head and changes in the spectral composition ofthe light passing through the optical fiber are of significance [1,2,3]. There are very few papers dealing with this problem and the results published are usually based solely on digital simulation [1,3]. The papers based on experimental results provide incomplete information being restricted to energy flux losses only as a function of chosen angles of incidence ofthe beam on the optical fiber head [2].…”

Section: Introductionmentioning

confidence: 99%

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Spatial distribution of luminance of light emitted by optical fibers

Czech

2003

SPIE Proceedings

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“…With the knowledge of the components of the vector R ( fig.6) and of the position of the point R at the front of the light fibre, it is possible to determine the point of the intersection of the line coinciding with this vector with the side surface of the cylinder: 4+Y=r2 (7) where z -lies in the interval from 0 do 1 (1 -length of light fibre), r -radius of core. w: =R…”

Section: Course Of the Luminous Flux In The Light Fibrementioning

confidence: 99%

<title>Transfer of luminous flux through optical fiber for illumination</title>

Dorosz

Dybczyński

2003

SPIE Proceedings

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The paper considers problems concerning the entry of the light beam into optical fibre, its propagation inside as well as the processes connected with the beam's exit. Light flux losses occurring during the processes mentioned above, such as Fresnel' s reflections, internal reflections on the interface of the two media as well as the losses resulting from the absorption of the radiation inside the core of the optical fibre were discussed. The work also describes the algorithm of numerical computations and the results of computer simulations in the function of such variable parameters as the distance of the light source from both the symmetry axis and the front of the optical fibre, linear absorption coefficient of the fibre core material, losses resulting from the defective internal reflections as well as the length of the core itself The numerical results were presented graphically.

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Modeling Light Transfer through Optical Fibers for Illumination Applications

Cited by 9 publications

References 6 publications

Monte Carlo ray-tracing in particle-doped light guides

Monte Carlo ray-tracing in particle-doped light guides

Spatial distribution of luminance of light emitted by optical fibers

<title>Transfer of luminous flux through optical fiber for illumination</title>

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