Light Meters are device used to measure amount of light. Unit of light measurement is Lux and Foot candle. Lux (lx) is amount of illuminance per square meter from one feet of light soure. Lux meters used method photodetector, best placed with light source for optimal exposure. The values ​​obtained from optical receiver will be displayed to the user via either analog or digital device.

 

▼ Basic components of a light meter

1. Sensor is the most important part of lux meter. Sensor is photoelectric cell that converts light to electric charge, sensor will installed inside plastic dome can receive light from multiple directions.

2. Display is important to display measured values. LED, LCD display for digital meter.

3. Processor received data from sensor and convert to digital, and send value to display.

4. Cap is part of protection sensor, mostly made from plastic or rubber.

 

Lux Meters are device used to measure amount of illuminance. Unit of light measurement is Lux, Foot candle, cd/m². Some model included internal memory for data-logger and transfer data into PC to analysis with software. Light intensity measurement in offices, factories, schools, establishments are so important. Photography usually uses a metering device to determine optimal exposure both digital and analog. Which help the photographer determine and control shutter speed and F-number for suitable illuminance. In addition lux meters also used in the film for scene design to determine appropriate exposure for scene.