Lamp module, particularly for spectral analysis devices
A known lamp module for spectral analysis devices includes a lamp receptacle body having a cavity for receiving a deuterium lamp having a lamp bulb made of synthetic quartz glass. The cavity has a beam outlet opening closed with an optical transmission element. In order to provide a lamp module having a deuterium lamp with an ozone filter that exhibits a long service life, that can be manufactured economically, and that ensures a high intensity in a wavelength range between 190 nm and 250 nm, such a known lamp module is provided with a VUV edge filter in the beam outlet opening on the side of the optical transmission element facing the deuterium lamp.
1. A lamp module comprising a lamp receptacle body ( 1 ) having a cavity ( 12 ) receiving a deuterium lamp ( 2 ) having a lamp bulb made of synthetic quartz glass, the cavity ( 12 ) having a beam outlet opening ( 4 ) closed with an optical transmission element ( 5 ), and a VUV edge filter ( 6 ; 9 ) located in the beam outlet opening ( 4 ) on a side of the optical transmission element ( 5 ) facing the deuterium lamp ( 2 ).
2. The lamp module according to claim 1 , wherein the lamp bulb is positioned in the cavity ( 12 ) of the lamp receptacle body leaving a gap ( 2 a ), the gap having a width in a range of 0.5 mm to 5 mm.
3. The lamp module according to claim 2 , wherein the gap ( 2 a ) is held under a vacuum or is filled with an oxygen-free gas.
4. The lamp module according to claim 1 , wherein the optical transmission element ( 5 ) is arranged in the beam outlet opening ( 4 ) with a spacing from the lamp bulb of a maximum 20 mm.
5. The lamp module according to claim 1 , wherein the lamp receptacle body ( 1 ) comprises a metallic cooling body.
6. The lamp module according to claim 1 , wherein the VUV edge filter ( 6 ) is arranged directly on a surface of the optical transmission element ( 5 ) in the beam outlet opening ( 4 ).
7. The lamp module according to claim 1 , wherein the VUV edge filter ( 9 ) is arranged in the beam outlet opening ( 4 ) with a spacing from a surface of the optical transmission element ( 5 ) facing the deuterium lamp ( 2 ).
8. The lamp module according to claim 7 , wherein the VUV edge filter ( 9 ) has a thickness in a range of 0.1 to 1 mm.
9. The lamp module according to claim 8 , wherein the VUV edge filter ( 9 ) has a maximum thickness 0.3 mm.
10. The lamp module according to claim 1 , wherein the VUV edge filter ( 6 ; 9 ) is selected from an absorption filter, an interference filter, and a combination of these two filters.
11. The lamp module according to claim 1 , wherein the VUV edge filter ( 6 ; 9 ) comprises a multi-layer material.
12. The lamp module according to claim 1 , wherein the beam outlet opening ( 4 ) is sealed against the outside.
13. The lamp module according to claim 1 , wherein the VUV edge filter ( 6 ; 9 ) has an absorption edge in a range of 180-200 nm.
14. The lamp module according to claim 1 , further comprising a second spectral lamp ( 3 ) arranged in a cavity (la) of the lamp receptacle body ( 1 ), the second spectral lamp ( 3 ) having a beam guided through the lamp bulb of the deuterium lamp ( 2 ) to the beam outlet opening ( 4 ).
15. The lamp module according to claim 14 , wherein the second spectral lamp ( 3 ) is selected from a halogen lamp and a light-emitting diode.
16. A spectral analysis device comprising the lamp module according to claim 1 .