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Обобщённая оптическая теорема и описание точечных источников излучения «СВЕТОТЕХНИКА», 2021, №2

Журнал «Светотехника» №2

Дата публикации 20/04/2021
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Обобщённая оптическая теорема и описание точечных источников излучения «СВЕТОТЕХНИКА», 2021, №2
Авторы статьи:
Апресян Леон Арсенович

Апресян Леон Арсенович, кандидат физ.-мат. наук. Старший научный сотрудник Института Общей Физики им. А.М. Прохорова РАН. Окончил МФТИ в 1972 г., защитил кандидатскую диссертацию в 1978. Круг интересов: статистическая радиофизика, электродинамика случайно-неоднородных сред

Аннотация
Даётся простой вывод обобщённой формы оптической теоремы для случая консервативного рассеивателя в однородной непоглощающей среде, пригодной для описания точечных источников излучения и области наблюдения, близкой к рассеивателю. Изложение построено на использовании операторного подхода и скалярного волнового уравнения в пределе исчезающе малого поглощения. Такой подход не требует асимптотических оценок быстро осциллирующих интегралов, не использует интегрирования потоков энергии, приводящего к потере информации о законе сохранения энергии, и допускает естественное обобщение на случаи поляризованного излучения и более сложных многокомпонентных полей. Полученная оптическая теория обобщает соответствующие результаты для специальных моделей рассеивателей (известные из математической литературы) на общий случай вещественного рассеивающего потенциала и произвольных источников излучения.
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