The tablet through the near infrared transmitted spectrum measurement instrument

摘要

PROBLEM TO BE SOLVED: To provide an instrument for measuring near-infrared transmission spectra of phermaceutical tablets in which entrance of stray radiation, reaching a photodetector, is minimized or is excluded.;SOLUTION: This instrument is equipped with a beam transmission means for transmitting a near-infrared light beam of narrow bandwidth through a phermaceutical tablet, a photodetection means for detecting light transmitted through the tablet, a tablet locator located so as to pass over the light beam, the tablet locator comprising a main body having an upper surface and a lower surface, the upper surface having a stepped well, the stepped well having a first section and a second section centered on the first section, the second section having an exit portal smaller than tablet, wherein the second section receives a tablet, the exit portal having a diameter less than the diameter of the tablet and allowing passing of the light beam passing through the tablet from the lower surface through the second section, and a masking means received in the first section, the masking means having a center opening which provides an optical path for the light beam emitted from the beam transmission means for transmission through the tablet within a boundary inside the boundary of the upper surface of the tablet.;COPYRIGHT: (C)2007,JPO&INPIT