Glossary
- illuminometer A photometric instrument used to measure the illumination falling on a surface. It may be photoelectric or visual.
- brightness meter An instrument for measuring the brightness (luminance) of a scene. It may be a spot meter, covering an area of a degree or less, or an averaging meter, covering a broad area of the scene. Brightness meters may be visual, in which case an image of...
luminancephotometric instrumentsmeasures illuminationphotoelectricbrightness metersilluminance meterlux meterlight measurementtest & measurementlight sources