Mercury short-arc lamp

Details Mercury short-arc lamp Mercury short-arc lamp

H - Electricity

05

B

H05B 31/02 (2006.01) G03F 7/20 (2006.01) H01J 61/073 (2006.01) H01J 61/26 (2006.01) H01J 61/82 (2006.01)

Patent

CA 2323324

The invention proposes arranging a getter (7) made from niobium on the electrode rod (4) of a mercury short-arc lamp, the two following conditions being fulfilled: ~ D > 1.8 . d and ~ .alpha. ~20°. In this case, D and d denote a diameter of the relevant electrode head (2) or the associated electrode rod (4), and .alpha. denotes an angle which is defined by the longitudinal axis of the electrode and an imaginary connecting line between the end of the getter (7) averted from the electrode head, and a point on the perpendicular, running through the end of the electrode rod on the electrode head side, to the electrode longitudinal axis. The point mentioned corresponds to the projection of the maximum radius of the lateral surface of the electrode head onto this perpendicular. An improved maintenance of the lamp is thereby achieved.

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