- Cámara Fotográfica
- Rueda de medir
Sirve para la medición precisa de los acontecimientos luminosos en el sector de la industria, el comercio, la agricultura y la investigación. Además se puede utilizar el luxómetro para comprobar la iluminación del ordenador, del puesto de trabajo, en la decoración de escaparates y para el mundo del diseño. Contiene una célula fotoeléctrica que capta la luz y la convierte en impulsos eléctricos, los cuales son interpretados y representada en una pantalla con la correspondiente escala de luxes.
Un luxómetro (también llamado luxmetro o light meter) es un instrumento de medición que permite medir simple y rápidamente la iluminancia real y no subjetiva de un ambiente. La unidad de medida es lux. Contiene una célula fotoeléctrica que capta la luz y la convierte en impulsos eléctricos, los cuales son interpretados y representada en un display o aguja con la correspondiente escala de luxes.
El luxómetro moderno funciona según el principio de una celda (célula) C.C.D. o fotovoltaica; un circuito integrado recibe una cierta cantidad de luz (fotones que constituyen la “señal”, una energía de brillo) y la transforma en una señal eléctrica (analógica). Esta señal es visible por el desplazamiento de una aguja, el encendido de diodo o la fijación de una cifra. Una fotoresistencia asociada a un ohmímetro desempeñaría el mismo papel.
Un filtro de corrección de espectro permite evitar que las diferencias de espectro falseen la medida (la luz amarilla es más eficaz que la azul, por ejemplo, para producir un electrón a partir de la energía de un paquete de fotones).
Los luxómetros pueden tener varias escalas para adaptarse a las luminosidades débiles o las fuertes (hasta varias decenas de millares de luxes).
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