If it is damaged, then there can be breakage along the path of the filament. The other way to test the lamp is to manually inspect the filament. If there is continuity between the two points then, the lamp is ok. After that check the continuity at the two points of the pin. Then set it in a diode or continuity mode. So, it will be difficult to observe the slide. Thus, the lamp will emit a yellow color light.
For example, in a compound microscope, if you are using a low voltage 6 VDC lamp instead of 12 VDC, then the lamp will not emit sufficient light. Second thing is that you need to know the rating of your lamp before use.
Halogen lamp skin#
So, if anyone touches the bulb, there can be a high chance of skin burn.įirst thing is that do not touch the head of the halogen lamp when it is in use. The filament of the lamp is extremely hot.And the remaining energy converts into heat energy. That means, out of the total energy only 10 to 30% converts into light energy. The efficiency of the halogen lamp is not more than 10 to 30%.It has got a higher efficiency in comparison to other incandescent lights.It has got a compact size in comparison to other light sources.Thus it prevents the blackening of the lamp.
The halogen gas present in the lamp does not allow the tungsten to adhere to the wall of the lamp. This is more than that of a regular incandescent lamp. The lifespan of a halogen lamp is about 2000 hours in an ideal case. This cycle increases the life span of the lamp and maintains the proper light transmission. So, this process of bringing the evaporated tungsten back to the filament by the halogen gas is known as the halogen cycle. Thus, the tungsten combined with the gas can return to the filament. So, it prevents the blackening of the lamp.Īs the halogen gas is in continuous motion, it comes in contact with the filament. But, in the case of a halogen lamp, the tungsten combines with the halogen gas. In the case of a normal incandescent lamp, this tungsten gets adhered to the wall of the glass covering. Novel gases help to reduce the rate of evaporation of the tungsten. Due to extremely high-temperature evaporation of the tungsten takes place. This rise in the temperature of the filament causes the emission of light (white or yellow). When the current flows through an extremely thin tungsten filament heat is produced. Along with this, a trace amount of halogen gases such are iodine and bromine are present inside the lamp. The inert gas such as argon fills up the major portion of the lamp. This filament is very thin and compactly arranged inside the quartz envelope. Halogen lamp consists of a tungsten filament. Halogen Lamp Construction and Working Halogen Lamp Besides that, we will also discuss the advantages, disadvantages, handling, and testing methods of the halogen lamp. Thus, today we will discuss the construction and working of this lamp. It is also used in film projectors, scientific equipment, etc. In medical equipment such as the microscope, colorimeter, clinical chemistry analyzer, etc, it is useful to carry on the tests. For example, in the house, it is useful to light up the rooms. Due to its wide range of sizes and variations, it has been widely used in a number of applications. It can be an AC or DC and are available in various shapes and sizes. It operates on the principle of the halogen cycle. A halogen lamp is a type of incandescent lamp with a fraction of halogen gas in it.
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