An automated system for evaluation of the quality of light sources

„Skywatcher” System for Daylight Measurements

“…Due to the lack of reduction gears, backlash was reduced, which resulted in high accuracy of the head positioning. This solution has been patented by Sky Watcher as Freedom Find ™ [12] and is used in all heads made by this company. It allows the head to be moved in both axes (Figure 5) either manually, by releasing the clutch, or electronically, without losing its current position.…”

“…The illuminance mainly depends on the sun movement during the day and the permeability and thickness of the cloud layer. [1][2][3][4][5][6][7][8][9][10][11][12] This article analyzes the possibility of measuring the sky luminance distribution using the SkyWatcher Virtuoso automated system, which was originally used for astronomical observations. However, it has the ability to mount other measuring devices and can be manually controlled or programmed according to the assumed algorithm.…”

The ecological hazard of artificial lighting in greenhouses

“…Artificial glass lighting can introduce one more harmful component of light pollution. It is a pulse control of the LEDs power [20][21][22][23] in the greenhouse lamps. It is a very popular way in energy-electronics of controlling the source of power, optical power including [24][25].…”

Desarrollo de un sistema electrónico con desplazamiento bidimensional para obtener el flujo lumínico en distintas fuentes de iluminación para conseguir sus curvas características

“…Dentro de los factores ambientales, se ha observado que las semillas de muchas especies requieren luz para germinar y para algunas, la luz, es un requerimiento obligatorio, en algunas especies el proceso de preparación en las semillas para su germinación tiene hasta un 50% si está expuesta a la luz infrarroja en el rango del espectro visible que va de 620 nm a 750 nm (Fryc & Dimitrova-Grekow, 2016) Gráfica 1 Gráfica para obtener las constantes respecto a las longitudes de onda Para poder realizar la conversión de lúmenes a Watts es necesario tener una constante que permita conocer su equivalencia. En la Gráfica 1 se muestra la coordenada (555,683) donde la longitud de onda es 555 nm y 683 es la constante 683 lumen = 1 Watts o 1 lumen = a 0.001464 Watts.…”