X-ray or gamma ray systems or devices – Source – Electron tube
Reexamination Certificate
2007-08-21
2007-08-21
Song, Hoon (Department: 2882)
X-ray or gamma ray systems or devices
Source
Electron tube
C378S141000
Reexamination Certificate
active
10558767
ABSTRACT:
An x-ray tube (24) includes an anode (42) defining a target. A cathode assembly (40) is in operative relationship with the anode to produce x-rays (56). An evacuated envelope (35) encloses the anode and cathode. The evacuated envelope includes a metal frame portion (39). The material comprising the metal frame portion has a backscatter coefficient. An x-ray transmissive window (41) is joined in a vacuum tight manner to the metal frame portion of the evacuated envelope. The material comprising the x-ray transmissive window has a backscatter coefficient. A backscatter layer (90) is deposited on the x-ray transmissive window and the metal frame portion of the evacuated envelope around the x-ray transmissive window. The backscatter layer has a backscatter coefficient greater than the backscatter coefficient of both of the window and the metal frame.
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Kautz Allan D.
McDonald James L.
Koninklijke Philips Electronics , N.V.
Song Hoon
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