Far infrared

Far Infrared (FIR) is a region of the infrared spectrum of light that has a wavelength longer than visible light, but shorter than microwave radiation. The range of wavelengths for far infrared is approximately 15 micrometers (μm) to 1 mm, which means it is situated between the mid-infrared and microwave bands of the electromagnetic spectrum. This type of radiation, invisible to the human eye, is perceived as heat by the skin.

Properties and Applications

Far infrared radiation possesses unique properties that make it useful in a variety of applications, ranging from medical therapy and heating to astronomy and environmental science.

Medical Therapy

In the field of medicine, FIR is used for its therapeutic effects. It is believed to improve blood circulation, relieve pain, reduce inflammation, and promote muscle relaxation. Devices such as infrared saunas and heating pads emit FIR to penetrate the human tissue, providing a deep, soothing warmth. FIR therapy is often used in the treatment of chronic conditions such as rheumatoid arthritis, fibromyalgia, and back pain.

Heating

Far infrared is also utilized in heating applications due to its ability to produce a comfortable, radiant heat that warms objects directly without significantly heating the air in between. This principle is applied in products like infrared heaters and outdoor heating systems.

Astronomy

In astronomy, FIR observation is crucial for studying the universe. Far infrared telescopes can detect the thermal emissions of objects in space that are too cool to emit light visible to the naked eye, such as nebulae, galaxies, and interstellar clouds. This information helps astronomers understand the structure and formation of celestial bodies.

Environmental Science

In environmental science, FIR technology is used in remote sensing to monitor and analyze the Earth's atmosphere and surface. It can help detect changes in temperature, moisture levels, and chemical compositions, contributing to research in climate change and environmental protection.

Health and Safety

While FIR is considered safe for various applications, including medical therapy, excessive exposure can lead to potential health risks such as overheating and burns, especially with direct contact devices like heating pads. It is important to use FIR products according to manufacturer guidelines and under professional supervision when used for therapeutic purposes.

Research and Development

Ongoing research in the field of far infrared technology aims to expand its applications and improve its efficiency. Innovations in materials science, for example, are leading to the development of more effective FIR emitting fabrics and surfaces. In medicine, studies continue to explore the full range of therapeutic benefits and potential uses of FIR in treating different health conditions.