Solid state photo sensor with adjustable viewing means

摘要

An x-ray source propagates radiation across an examination gap onto a intensifier tube input screen. The output screen of the intensifier tube is viewed by a video camera. A sampling means is disposed between the intensifier output screen and the video camera. The sampling means views the intensifier output screen and converts the viewed image into an electronic control signal for the x-ray source. The sampling means includes a first block pivotally secured to a second block below a receiving hole in the first block. The blocks are adjustably biased in pivoting tension about a pivot below the receiving hole. A barrel is frictionally engaged in the receiving hole. One end of the barrel is angled on one side and cutout on the other side. A mirror is fixedly disposed on the angled side such that light propagating through the cutout is reflected through the central axis of the barrel to a photo diode fixedly disposed at the other end of the barrel. The sampling means is disposed such that the mirror is positioned to view the face of the intensifier output screen. The pivot provides a pivoting adjustment of the mirror viewing position along a first line perpendicular to the pivot. The receiving hole and barrel cooperate to provide rotatable adjustment about the central axis of the barrel.