Cathodoluminescence light, cathodoluminescence light sources.
Cathodoluminescence lamp is based on the phenomenon of field emission. Its principle of operation is similar to the principle of operation of cathode ray tubes of old televisions. The lamp has high reliability, durability and high luminous intensity.
Cathodoluminescence lamp (cathodoluminescence light sources) is based on the phenomenon of field emission.
Its principle of operation is similar to the principle of operation of cathode ray tubes of old televisions. So, in a sealed glass bulb (tube) creates a vacuumin which is placed the cathode (negative electrode) and anode (positive electrode). As the cathode uses carbon material composed of carbon nanofibers. The advantage of this material is that it is not heated and is able to operate for a long time. Between the cathode and the anode creates a potential difference, reaching a dozen kilovolts. Under the action of electric field the electrons leave the cathode and bombard the surface of the anode. Because under the surface of the anode is applied a thin layer of phosphor, the latter from the penetration of electrons begins to glow, emitting photons.
Cathodoluminescence lamp capable of emitting light in any spectral region, from red to ultraviolet. The lamp has high reliability, durability and high luminous intensity. She is not afraid of heat and requires cooling.
Thus, in the experiments of the Russian scientists have created a prototype cathodoluminescence lamps for General lighting. Has been achieved the following characteristics, cathodoluminescence lamp: luminous flux 250 LM (which is comparable with the incandescent lamp 25 W) at a power consumption of 5.5 W. Luminous efficiency of this lamp is 30-40 LM/W. Lamp has a built-in power supply with standard E27 socket and can be connected to a conventional lamp.
– favorable, human-readable radiation spectrum,
– large area light emitting surface,
– large range of working ambient temperature
– long service life,
– higher brightness compared to the LEDs
– high speed on/off switch.
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