Patent ID: 8912503

Claim:
A transmission X-ray analyzer for detecting a transmission X-ray image of a sample that moves relatively in a predetermined scanning direction, the transmission X-ray analyzer comprising: a time delay and integration (TDI) sensor comprising a plurality of two-dimensionally arranged image pickup devices for reading charge generated when an image derived from the transmission X-ray image is subjected to photoelectric conversion, the TDI sensor comprising a plurality of stages of line sensors including the plurality of two-dimensionally arranged image pickup devices arranged in a direction perpendicular to the predetermined scanning direction, the plurality of stages of line sensors being arranged in the predetermined scanning direction, and the TDI sensor being configured to transfer charge accumulated in one line sensor to an adjacent subsequent line sensor; shielding means for shielding an image of light entering an arbitrary number of stages of the TDI sensor by moving back and forth in the predetermined scanning direction, the shielding means being disposed between the TDI sensor and the sample; and position control means for controlling a position of the shielding means so as to shield an arbitrary number of stages of line sensors among the plurality of stages of line sensors.