Electric lamp having a mirror-coated lamp vessel

Details Electric lamp having a mirror-coated lamp vessel Electric lamp having a mirror-coated lamp vessel

H - Electricity

01

K

313/173, 313/84,

H01K 1/32 (2006.01) H01J 9/20 (2006.01) H01K 3/00 (2006.01)

Patent

CA 1263137

PHN 11 721 28-1-1987 ABSTRACT: "Electric lamp comprising a mirror-coated lamp vessel". The electric lamp has a lamp vessel (1) of which a wall portion (4) is mirror-coated at its inner surface with an aluminium layer. This wall portion (4) has a boundary (5) near the largest diameter (2) of the lamp vessel (1). This boundary (5) is adjoined by a zone (10) coated with a transparent aluminium oxide layer. In the lamp, a dark zone caused by a very thin aluminium layer adjoining the boundary (5) is avoided.

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