Patent ID: 9417130
Filing Date: 2016-08-16
CPC Classification: G01J

Claim Text:
1. An interference spectrophotometer comprising: a movable mirror unit having a movable mirror capable of reciprocating movement; a stationary mirror; an infrared light source unit which emits an infrared light; a beam splitter which receives infrared light from said infrared light source unit, splits it into two toward said fixed mirror and movable mirror, receives the infrared light which is reflected back from said stationary mirror and the infrared light which is reflected back from the movable mirror, and combines them into interference light; an interference light detection unit in which a sample is placed and which detects light intensity information of interference light transmitted or reflected by said sample; a movable mirror velocity information detection unit which detects movable mirror velocity information for said movable mirror; and a control unit which acquires said light intensity information and movable mirror velocity information and computes the absorption or transmission spectrum of said sample; said interference spectrophotometer being further characterized in that it comprises a storage unit which stores a correlation function indicating change in light intensity information in relation to movable mirror velocity, and a target movable mirror velocity, and said control unit corrects the light intensity information obtained by said interference light detection unit into corrected light intensity information which would be obtained when the movable mirror velocity of said movable mirror is the target movable mirror velocity, using said movable mirror velocity information and correlation function.