Infrared lamp is a kind of lamp type apparatus that emits electromagnetic wave length of 0.77-1000 μ M. Its wavelength is electromagnetic radiation between red light and microwave, which belongs to invisible light. The lamp cap is usually made of ceramic cone-shaped wick, which is made of nickel chromium alloy coil. After being electrified, the filament burns at about 500 ℃ and emits a lot of infrared rays. It can be divided into near infrared region (0.77-3.0 μ m), mid infrared region (3.0-30.0 μ m) and far infrared region (30.0-1000 μ m). It has the characteristics of high thermal efficiency. It is mainly used in medical physiotherapy, food baking and paint drying.