Спектроскопия. Спектрофотометр. Изучаем свет и светодиоды.

PPFD - плотность фотосинтетического фотонного потока (photosynthetic photon flux density).

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Спектроскопия. Спектрофотометр. Изучаем свет и светодиоды.

Сообщение Admin » 12 май 2016 13:44

Для исследования спектра, который излучает светодиод и мощностных характеристик излучения, таких как PPFD (микромоли), милливаты, люксы, CRI мы будем применять USB спектрофотометр производства США Ocean Optics STS-VIS, оснащенный косинус-корректором CC-3-UV-S и оптокабелем QP600-025-VIS-NIR длиной 25см.
Полученные измерения обрабатываются официальным программным обеспечением OceanView, которое позволяет проводить широчайшие измерения в области спектроскопии и спектрофотомерии.
Спектрофотометр:
IMG_4285.JPG
IMG_4285.JPG (397.14 КБ) 42277 просмотров

Оптокабель:
IMG_4286.JPG
IMG_4286.JPG (390.54 КБ) 42277 просмотров

Косинус корректор:
IMG_4288.JPG
IMG_4288.JPG (403 КБ) 42277 просмотров

Косинус корректор:
IMG_4289.JPG
IMG_4289.JPG (392.32 КБ) 42277 просмотров


Для примера измерен спектр LED лампы "филамент" мощностью 6Вт, температура свечения 2700К.
Спектр лампы Филамент 6Вт.png
Спектр лампы Филамент 6Вт.png (49.04 КБ) 42277 просмотров


А так же спектр солнца ближе к закату, время измерения 19:00:
Солнечный спектр 19.jpg
Солнечный спектр 19.jpg (159.6 КБ) 42275 просмотров


По ходу развития форума мы будем постоянно проводить измерения различных светодиодных светильников и фитоламп. Измерять их реальные характеристики и спектр. В процессе создавать и выкладывать видео на наш YouTube канал, подписывайтесь!

Для измерения мощностных параметров света с высокой точностью связка из спектрофотомера+оптокабель+косинус-корректор должна быть откалибрована с помощью эталонного источника света. Мы обзавелись специальным калибратором OceanOptics HL-2000-CAL. Эталонный источник света, собственная калибровка приближена к эталонам NIST.
Процедура калибровки заключается в сравнении измерения излучения калибровочной лампы с заведомо известными параметрами этой же лампы (параметры даны в отдельном файле). После измерения вводятся необходимые поправочные коэффициенты и сохраняются в каллибровочный фаил, котороый и используется при дальнейших измерениях. Таким образом достигается очень высокая точность измерений. Инструкцией даже запрещается разбирать связку спектрофотомера+оптокабель+косинус-корректор, после сборки - разборки требуется повторная калибровка.

О спектре и параметрах солнечного света можно прочесть тут: https://www.ppfd.ru/viewtopic.php?f=38&t=13

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