Schott Ag

Christopher Moelle

Lars Bewig

Wolfram Maring

Jochen Heinz

Thomas Kuepper

Thomas Küpper

Wolfgang Moehl

In order to improve the energy balance of an HID lamp, the quartz burner, preferably the inside thereof, is coated with a UV reflecting layer system by alternatingly applying amorphous thin layers made at least of titanium oxide and silicon oxide having the respective general stoichiometry TiOand SiOby means of a plasma impulse chemical vapor deposition (PICVD) method at a high power density and increased substrate temperatures ranging from 100&#xb0; to 400&#xb0; C., using small growth rates ranging from 1 nm/sec to 100 nm/sec so as to form an interference layer system having a thickness of less than 1200 nm and a minimized UV-active defective spot rate ranging from 0.1 to 1 percent.

Method for coating the quartz burner of an HID lamp

The invention relates to a process for producing an object which has optical layers. According to the invention such a process comprises the following process steps: To a substrate of plastic material several optical layers are applied; the optical layers are applied by means of a chemical plasma-impulse vaporization (PICVC).

Object which has optical layers

Growing community of inventors

Bad Gandersheim, Germany

Christopher Moelle