Despite its simplicity and low cost, incandescent, popularly referred to as the "light bulb Ilyich", has a very serious disadvantage — for the formation of the luminous flux it uses only 5% of energy consumption, and the rest turns into heat. Today, as more fuel-efficient, mercury-touted compact fluorescent lamps (CFL) with spiral tubes. You’ll save on electricity, but on buying bulbs themselves — will go broke. Yes, and they are not safe. As an alternative to LED bulbs. But their retail price is much higher luminescence.
Meanwhile, there is already a source of light, devoid of many of the drawbacks of the existing lamps. It came up with Yuri Makarov, a senior researcher at the Moscow Aviation Institute. Lamp Makarova (inventor colleagues jokingly called her "light bulb Vassilyitch") is based on the standard incandescent light bulbs with a metal cap, with the only difference being that in the main bulb filament is placed into another thin-walled flask, located in the zone of maximum temperatures (1000 — 2000 ° C) and made of a metal mesh or a heat-resistant cloth (asbestos, carbon cloth). To this flask was uniformly coated with a layer of high phosphor. After incorporating such lamps spiral phosphor almost instantly heats to 1500 ° C and it converts absorbed light energy into heat radiation.
The picture shows the conventional incandescent lamps (60 W) and compact fluorescent lamp (11 W) of the same light output, right — an experimental lamp Makarova (it mesh with the phosphor is placed outside the lamp, which does not allow it to heat up to the optimum temperature) power of 60 W;
As the phosphor of high — a substance which under the influence of the temperature begins to glow, can be used, for example, zinc sulphide activated with copper cations, or salts of sodium and potassium, other metal cations activated. The brightness of the lamp as a whole is expected to be 2-3 times the brightness of the spiral, the heating lyuminoforovuyu flask. Therefore, the light output of a new 40-watt light bulbs will be the equivalent light output of a conventional incandescent lamp of about 150 watts. In this case, energy savings of 70-80%.
For mass production of new bulbs with absolutely harmless thermal luminescence require only minimal upgrading of the existing tube production. The cost of one new bulb is estimated Yu.Makarova not exceed 10 rubles.