Photonics Dictionary

infrared light source

An infrared light source is a device that emits light in the infrared spectrum, which lies beyond the visible spectrum of light. Infrared light has longer wavelengths than visible light and is typically invisible to the human eye. However, it can be detected by specialized equipment such as infrared cameras or sensors.

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There are several types of infrared light sources, each with its own method of generating infrared radiation:

Incandescent bulbs: These are similar to standard light bulbs but are designed to emit more infrared radiation than visible light. They generate heat, which causes a filament inside the bulb to glow and emit infrared radiation.

Light-emitting diodes (LEDs): Infrared LEDs are semiconductor devices that emit light in the infrared spectrum when an electric current passes through them. They are commonly used in remote controls, security systems, and proximity sensors.

Infrared lasers: Infrared lasers produce highly focused beams of infrared light. They are used in various applications such as communication systems, laser printers, medical equipment, and industrial processing.

Gas discharge lamps: Some types of gas discharge lamps, such as mercury vapor lamps and xenon arc lamps, emit infrared radiation as part of their spectral output. These lamps are often used in scientific and industrial applications.

Infrared light sources have numerous practical applications across various fields, including: Infrared photography and videography, night vision technology, remote sensing and satellite imaging, thermal imaging for security, surveillance, and medical diagnostics, communication systems such as infrared data transmission and remote controls, additionally heating and drying processes in industrial applications

Overall, infrared light sources play a crucial role in enabling technologies that rely on the detection and manipulation of infrared radiation.
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