Electric lamp provided with an interference filter
First Claim
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1. An electric lamp provided with a glass lamp vessel sealed in a vacuum-tight manner and having an SiO2 content of at least 95% by weight, current supply conductors extending through the wall of the lamp vessel to an electric element arranged in the lamp vessel and an interference filter of alternating layers consisting essentially of SiO2 and consisting essentially of niobium oxide provided on the glass lamp vessel.
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Abstract
The electric lamp according to the invention has a lamp vessel (1) of glass having an SiO2 content of at least 95% by weight, in which an electric element (3) is arranged. The lamp vessel is coated with an interference filter (5) of alternating layers of SiO2 and Nb2 O5.
21 Citations
2 Claims
- 1. An electric lamp provided with a glass lamp vessel sealed in a vacuum-tight manner and having an SiO2 content of at least 95% by weight, current supply conductors extending through the wall of the lamp vessel to an electric element arranged in the lamp vessel and an interference filter of alternating layers consisting essentially of SiO2 and consisting essentially of niobium oxide provided on the glass lamp vessel.
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Current AssigneeUS Philips Corporation (Koninklijke Philips N.V.)
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Original AssigneeUS Philips Corporation (Koninklijke Philips N.V.)
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InventorsKuus, Gijsbert
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Primary Examiner(s)Moore, David K.
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Assistant Examiner(s)Wieder, K.
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Application NumberUS06/871,033Time in Patent Office663 DaysField of Search313/112, 313/113, 313/580, 313/315, 350/164, 350/166, 350/311US Class Current313/112CPC Class CodesG02B 5/282 reflecting for infrared and...H01K 1/32 provided with coatings on t...
