SPECTRAL MEASURING DEVICE

摘要

A spectral measuring device, wherein a holder (30) for holding a specimen (100) is disposed on the outside of a vacuum chamber (50) having a light transmitting window (52a), a light radiating part having a light detection part and a terahertz light generator (6) is fixed to a base (53) disposed in the vacuum chamber and radiates terahertz pulse light to the specimen (100) on the outside of the vacuum chamber through the light transmitting window (52a) and specimen light from the specimen (100) is received by the light detection part through the light transmitting window (52a), and the base (53) in the vacuum chamber and the holder (30) on the outside of the vacuum chamber are connected to each other through a connection member (54a) passed through the partition wall of the vacuum chamber (50) so as to be airtight against and displaceable relative to the partition wall and so that the relative positions thereof can be fixed.