Arc lamp with an internally mounted filter
View Patent ↗An arc lamp with a filter mounted internally has been disclosed. The arc lamp includes an anode, a cathode, a body defining a cavity, wherein the anode and the cathode are inside the cavity, and a filter mounted within the cavity. Other embodiments are claimed and described.
1. An arc lamp comprising:
an anode;
a cathode;
a body defining a cavity, wherein the anode and the cathode are inside the cavity;
a filter mounted within the cavity; and
a washer to hold the filter in place within the cavity.
2. An arc lamp comprising:
an anode;
a cathode;
a body defining a cavity, wherein the anode and the cathode are inside the cavity; and
a filter mounted within the cavity, wherein the filter includes an aperture through which the cathode goes.
3. The arc lamp of claim 2 , wherein the filter is coated with a coating substantially over the aperture, the coating selected from a group consisting of an ultra violet suppression coating and an infrared rejection coating.
4. An arc lamp comprising:
an anode;
a cathode;
a body defining a cavity, wherein the anode and the cathode are inside the cavity;
a filter mounted within the cavity, wherein the filter is made of narrow bandpass glass; and
a washer to hold the filter in place within the cavity.
5. The arc lamp of claim 4 , wherein the filter is made of heat absorbing glass.
6. The arc lamp of claim 4 , wherein the filter comprises a circular quartz disc.
7. The arc lamp of claim 4 , wherein the filter operates within a temperature range of −40° C. to 500° C.
8. An arc lamp comprising:
a body defining a cavity;
an anode;
a cathode substantially aligned with the anode to define an arc gap in between;
a strut holding the cathode; and
a filter mounted within the cavity between the strut and the arc gap.
9. The arc lamp of claim 8 , wherein the filter includes an aperture through which the cathode goes.
10. The arc lamp of claim 8 , wherein the filter is coated with a coating substantially over the aperture, the coating selected from a group consisting of an ultra violet suppression coating and an infrared rejection coating.
11. The arc lamp of claim 8 , wherein the filter is made of narrow bandpass glass.
12. The arc lamp of claim 8 , wherein the filter is made of heat absorbing glass.
13. The arc lamp of claim 8 , wherein the filter comprises a circular quartz disc.
14. The arc lamp of claim 8 , wherein the filter operates within a temperature range of −40° C. to 500° C.
15. A method to make an arc lamp, the method comprising:
mounting a filter within a cavity defined by a body of the arc lamp; and
coupling a washer to the filter to hold the filter in place.
16. A method to make an arc lamp, the method comprising:
mounting a filter within a cavity defined by a body of the arc lamp; and
coupling a washer to the filter to hold the filter in place, wherein the filter defines an aperture substantially centered on the filter.
17. The method of claim 16 , further comprising mounting a cathode through the aperture of the filter.
18. The method of claim 16 , further comprising putting a coating substantially over the aperture, the coating selected from a group consisting of an ultra violet suppression coating and an infrared rejection coating.
19. The method of claim 16 , wherein the filter is made of narrow bandpass glass.
20. The method of claim 16 , wherein the filter is made of heat absorbing glass.
21. The method of claim 16 , wherein the lamp operates within a temperature range of −40° C. to 500° C.
22. The method of claim 16 , wherein the filter comprises a circular quartz disc.