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Radiation: Applications

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The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

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Published on: August 30, 2013

Fractioned-pattern radiation mapping, Part I: modeling.

Juan Camilo Valencia Estrada, Jorge Garcia-Marquez, Romain Etienne

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|June 10, 2024

Summary

This summary is machine-generated.

This study introduces a novel technique for predicting radiation distribution in optical systems by fractioning emitting source power among rays. This method accurately calculates irradiance and aids in designing various optical systems.

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Area of Science:

Optical Engineering
Radiometry
Computational Optics

Background:

Accurate prediction of radiation distribution is crucial for optical system design.
Existing methods may have limitations in handling complex optical paths and power losses.

Purpose of the Study:

To present a new technique for predicting radiation distribution in any optical system.
To enable accurate irradiance calculations by considering power losses along optical paths.

Main Methods:

Decomposing emitting source power into fractions assigned to individual rays.
Considering all types of power losses within the rays' optical paths.
Creating fractioned radiation patterns on the final optical surface for each ray.

Main Results:

Fractioned radiation patterns are generated, each representing a portion of the total radiation.
The total irradiance is calculated by summing the fractioned radiation maps.
The method is demonstrated to be non-zero étendue.

Conclusions:

The presented technique accurately predicts radiation patterns in optical systems.
This method simplifies the design of both image-forming and non-image-forming optical systems.
It offers a computationally efficient approach using a limited set of equations.