Patent ID: 9570264
Date: 2017-02-14
CPC Classifications: G01N,H01J

Claim:
1. A transmission type X-ray generator comprising: an anode having an electron path formation member having an annular inner wall surface so as to define an electron path hole, an integrated target including a target layer, an insulating substrate supporting the target layer and a conductive metal layer including a metal component, and an electron source facing the target layer so as to irradiate the target layer with electrons passing through the electron path hole so as to generate a main X-ray, wherein the electron path formation member has a sub X-ray generating portion receiving reflected electrons reflected from the target layer and generating a sub X-ray at the annular inner wall surface; wherein the target layer is disposed at a central area of the insulating substrate and is remote from a periphery of the insulating substrate; wherein the conductive metal layer is overlaid partially on the target layer such that the target layer is electrically connected to the electron path formation member via the conductive metal layer and the sub X-ray generating portion is irradiated with electrons reflected from the target layer or is overlaid under the target layer such that the target layer is electrically connected to the electron path formation member via the conductive metal layer and the sub X-ray generating portion is irradiated with electrons reflected from the target layer; and wherein at least a part of a peripheral area of the integrated target corresponding to the substrate not covered with the target layer has higher transmittance than that of the central area of the integrated target corresponding to the substrate covered with the target layer, with respect to the sub X-ray.