Source: Laser Components

<>

Understanding Infrared Emitters

Thermal Emitters

Thermal emitters are devices that emit thermal radiation from a heated source. They are commonly used in applications such as spectroscopy. Examples include incandescent lamps, Nernst lamps, and globars. Calibrated blackbody sources are also used, where a heated ceramic tube emits thermal radiation.

Pulsable Thermal Emitters

Pulsable thermal emitters utilize thin foils with low thermal capacitance to generate modulated thermal radiation on short timescales, typically in milliseconds. These emitters find applications in various industries, including laser printers.

Infrared Light Emitting Diodes (LEDs)

Infrared LEDs offer higher radiance compared to thermal emitters. They are capable of rapidly modulating output power, making them suitable for applications like remote control transmitters. Infrared LEDs come in a range of output powers, from a few milliwatts to several watts.

Advantages of Infrared LEDs

Unlike laser diodes, infrared LEDs pose lower risks in terms of laser safety. They provide directed output, although not as focused as laser diodes.

Conclusion

Understanding the different types of infrared emitters, including thermal emitters and infrared LEDs, is crucial for various applications in industries such as spectroscopy, remote controls, and industrial fabrication. Each type of emitter offers unique advantages in terms of radiance, modulation capabilities, and safety considerations.

Source: Amazon.de
Feel free to comment your thoughts.