Microwave lamp
A microwave lamp is a special form of a gas discharge lamp . Their specialty is the electrodeless design, similar to a nullode , and the energy supply in the form of microwave radiation .
functionality
The microwave lamp consists of a quartz glass ball or bulb filled with noble gas at low pressure and coated with metal halide salts. Using microwaves (typical frequency 2.45 GHz) from a magnetron , a plasma is generated in the sphere, also known as a burner , by ionizing the inert gas filling . The plasma causes the metal halide salt to evaporate. Noble gas plasma and metal halide vapor together now emit light in a broad spectral range . Lamps with this technology are also called LEP lamps ( Light Emitting Plasma ) or plasma lamps.
The light spectrum can be changed by doping the coating. With an Indium - bromide coating a bright midday light corresponding to color of light of 6500 K arise.
Other properties
By changing the power of the magnetron, microwave lamps can be dimmed to 50% , their color spectrum remains stable.
The color rendering index of microwave lamps is up to 95. The technology is scalable; the light output is up to 120 lumens / watt .
The lamp has a service life of 8,000 ( ultraviolet ) to 25,000 hours (decrease in luminous flux by 10%). The life of the magnetron is of a similar order of magnitude.
System outputs up to 5 kW are offered.
Due to the high luminous flux, the lamps are sometimes not installed directly on site. Instead, the light is guided into the room with the help of light guides . That makes this type of lamp easy to maintain.
In industry, ultraviolet microwave lamps are used for curing paintwork, coatings or bonds (UV curing).
An example of the microwave lamp is the sulfur lamp .
Web links
- Microwave lamp research and technology at the FH Aachen (incl. Script)
Individual evidence
- ↑ Ports are testing new plasma lamps . In: Schiff & Hafen , issue 12/2016, p. 53, DVV Media Group, Hamburg 2016, ISSN 0938-1643
- ↑ Data sheet of a commercial microwave lamp. (pdf; 649 kB) (No longer available online.) Luxim company, archived from the original on May 23, 2012 ; accessed on April 21, 2009 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Archived copy ( memento of the original from January 13, 2017 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ http://www.ceravision.com/products/high-bay
- ↑ http://www.ceravision.com/technology/future-applications
- ↑ equipment selector chart. (No longer available online.) Fusionuv.com, archived from the original on February 8, 2009 ; accessed on April 24, 2009 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
