Applicable wavelength range of tungsten halogen lamps

The applicable wavelength range of tungsten halogen lamps is 300nm to 1000nm.

Introduction to tungsten halogen lamps:

A tungsten halogen lamp is a gas-filled incandescent lamp whose filling gas contains some halogen elements or halide. In ordinary incandescent lamps, the high temperature of the filament causes the evaporation of tungsten, and the evaporated tungsten precipitates on the glass bulb, causing the bulb glass bulb to turn black.

Classification:

Tungsten halogen lamps are divided into 6 categories according to their uses: lighting tungsten halogen lamps, which are further divided into high-voltage double-ended lamps, low-voltage single-ended lamps and multi-plane cold reflection low-voltage directional lamps There are 3 types of lighting lamps, which are widely used in shops, showcases, exhibition halls, and home indoor lighting. Automotive tungsten halogen lamps are divided into headlights, low beam lights, cornering lights, brake lights, etc. Infrared and ultraviolet radiation tungsten halogen lamps, infrared radiation tungsten halogen lamps are used in heating equipment and copy machines.

Photography tungsten halogen lamps have replaced ordinary tungsten filament incandescent lamps in stage, film, television and news photography lighting. Instrument tungsten halogen lamps are used in modern microscopes, projectors, slides, medical instruments and other optical instruments. Cold reflection instrument tungsten halogen lamps are used in optical instruments such as portable movie machines, slide projectors, medical and industrial endoscopes, dental surgery coloring and solidification, color photo enlargement and printing.

Principle of tungsten halogen lamp:

1. Cycle

The process of tungsten halogen cycle is as follows: under appropriate temperature conditions, the tungsten halogen evaporates from the filament. Tungsten reacts with halogen substances in the bubble wall area to form volatile tungsten halogen compounds. Because the bulb wall temperature is high enough (250°C), the tungsten halogen compound is in a gaseous state. When the tungsten halogen compound diffuses into the hotter area around the filament, it is differentiated into halogen and tungsten.

The released tungsten is partially returned to the filament, while the halogen continues to participate in the recycling process. Fluorine, chlorine, bromine, iodine and various halogens can produce tungsten regeneration cycles. The main difference between them is the temperature required for the cycle reaction to occur and the degree of interaction with other substances in the lamp. Various bromine tungsten lamps and iodine tungsten lamps are produced in large quantities. Some lamps also use chlorine as a circulating agent. .

2. Luminescence

The luminescence principle of all incandescent lamps is realized by using the principle of luminescence and thermal radiation of objects when heated. The simplest incandescent lamp is to conduct enough light for the filament. When the current is applied, the filament heats up to an incandescent state and emits light, but the life of this incandescent lamp will be quite short.