photodetector

noun

pho·​to·​de·​tec·​tor ˌfō-tō-di-ˈtek-tər 

: any of various devices for detecting and measuring the intensity of radiant energy through photoelectric action

Examples of photodetector in a Sentence

Recent Examples on the Web

Rudra used the film to develop a photodetector for infrared light. — IEEE Spectrum, 7 Aug. 2025

An alternative is to use single pixel imaging techniques, which form images from randomized light falling on a single photodetector. — The Physics Arxiv Blog, Discover Magazine, 21 Mar. 2024

Each robot also had a photodetector that could sense the polarity of light, allowing basic commands to be sent using a simple flashlight with a polarization filter. — Ars Technica, 1 Mar. 2025

Crystals are used everywhere, from touchscreens, smoke alarms, solar panels, medical imaging devices, and most optoelectronics and photodetectors in general. — Keith Cooper, Space.com, 23 Oct. 2025

Word History

First Known Use

1947, in the meaning defined above

Rhymes for photodetector

• bisector
• collector
• connector
• corrector
• defector
• deflector
• detector
• director
• dissector
• effector
• ejector
• elector

Medical Definition

photodetector

noun

pho·​to·​de·​tec·​tor -di-ˈtek-tər 

: any of various devices for detecting and measuring the intensity of radiant energy through photoelectric action

… the pulse oximeter incorporates both photodiodes and photodetector in a fingertip sensor that can be clipped or taped to the patient's finger.

—The New England Journal of Medicine