photometer

• 测量光强度的科学仪器，可通过将光源与标准光源比较来测量，或用于摄影中测量光照水平。

A scientific instrument used to measure the intensity of light, either by comparing a light source to a standard or by measuring light levels for photographic purposes.

1. Luminous intensity meterC1formalscientific

   An instrument used to measure the brightness or luminous intensity of a light source by comparing it to a standard source, either visually or photoelectrically.

   光度计

   • The scientist used a photometer to measure the output of the new LED bulb.
   • A visual photometer compares two light sources side by side.
   • Photoelectric photometers provide more accurate readings than older models.

2. Photographic light meterB2formaltechnical

   A device used in photography to measure the intensity of light, helping to determine the correct exposure settings.

   摄影测光表

   • The photographer adjusted the aperture based on the photometer reading.
   • A built-in photometer in the camera helps set the shutter speed.
   • He used a handheld photometer to measure the light in the studio.

   同义词exposure meterlight meter