Output irradiance of tapered lightpipes.

@article{Moreno2010OutputIO,
  title={Output irradiance of tapered lightpipes.},
  author={Ivan Moreno},
  journal={Journal of the Optical Society of America. A, Optics, image science, and vision},
  year={2010},
  volume={27 9},
  pages={
          1985-93
        }
}
  • Ivan Moreno
  • Published 12 August 2010
  • Physics
  • Journal of the Optical Society of America. A, Optics, image science, and vision
A light cone efficiently transports, distributes, and concentrates the incoming radiation. I derive a formula for the spatial irradiance (or illuminance) distribution at the exit aperture of a tapered light pipe. The theory is demonstrated by Monte Carlo ray-tracing for lightpipes with light-emitting diodes at the input face. The analysis is based on the addition of the radiation patterns of the multiple virtual sources that, as in a three-dimensional kaleidoscope, are seen through a tapered… 

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References

SHOWING 1-10 OF 24 REFERENCES

Optimization of freeform lightpipes for light-emitting-diode projectors.

Standard nonimaging components used to collect and integrate light in light-emitting-diode-based projector light engines are compared to optimized freeform shapes and it is shown that the simultaneous optimization of the output surface and the profile shape yields transmission efficiency within the étendue limit up to 90% and spatial uniformity higher than 95%, even for compact sizes.

Design of Efficient LightPipes for Illumination by an Analytical Approach.

An analysis of several commonly used lightpipe configurations, e.g., straight and single circular bend, and different cross sections, leads to the maximization of throughput and transfer efficiency.

Gradually tapered light pipes for illumination of LED projectors

Abstract— LEDs are totally different from classical light sources: they have a different shape, radiation pattern, driving requirements, etc. Therefore, the illumination engine, which determines the

Three-dimensional measurement of light-emitting diode radiation pattern: a rapid estimation

We describe a simple imaging technique that enables a three-dimensional inspection of the angular intensity distribution of a light-emitting diode (LED) over a significant part of the hemisphere. The

Uniform illumination of distant targets using a spherical light-emitting diode array

An array of light-emitting diodes LEDs assembled upon a spherical surface can produce a wider angle distribution of light than a typical array i.e., an array assembled by mounting LEDs into a flat

No-loss bent light pipe with an equiangular spiral.

It is shown that in theory such a light pipe does exist, in a form corresponding to the so-called golden rectangle, that is capable of being bent without loss of light and with no limitations on acceptance angle.

Guiding Light From LED Array Via Tapered Light Pipe for Illumination Systems Design

In illumination systems, it is often necessary to get a structure that can have good performance on uniformity. Although light-emitting diodes (LEDs) are replacing conventional light sources in

Far-field condition for light-emitting diode arrays.

A far-zone condition for measuring or modeling propagation of light from an LED array is proposed and an equation gives the far-field distance as a function of the LED radiation pattern, array geometry, and number of LEDs.

8.3: Design of a Compact Light Engine for FLCOS Microdisplays in a p‐HMPD System

A compact light engine for a ferroelectric Liquid-crystal-on-Silicon (FLCOS) microdisplay used in a polarized head mounted projection display (p-HMPD) to improve the light efficiency and image uniformity is designed.