Imaging system and imaging method that perform a correction of eliminating an influence of ambient light for measurement data

摘要

An imaging system using a transmission light source unit includes a sensor unit (imaging unit) that detects light emitted from a light source unit, a storage unit that stores correction data for eliminating the influence of ambient light, and a signal processing unit that performs correction for eliminating the influence of ambient light on measurement data, which is obtained by measurement using a subject, based on the correction data. The correction data is calculated based on a difference between first reference data obtained by imaging in a state where a light shielding plate having an opening is disposed between the light source unit and the sensor unit and second reference data obtained by imaging in a state where no light shielding plate is disposed.

主权项

1. An imaging system that images a subject by irradiating the subject with light and detecting light transmitted through the subject, comprising:
a light source unit; a sensor that detects light emitted from the light source unit; a storage that stores first correction data calculated based on a difference between first reference data and second reference data, the first reference data being detected by emitting the light with a light shielding plate having an opening placed between the light source unit and the sensor unit and being detected in an opening corresponding region, which is a region in a detection surface of the sensor unit corresponding to the opening of the shielding plate, the second reference data being detected in the opening corresponding region by emitting the light without placing the light shielding plate; and a signal processor programmed to perform first correction of eliminating an influence of ambient light for measurement data, which is obtained by measurement using the subject, based on the first correction data, wherein the storage further stores second correction data for correcting light intensity distribution according to an irradiation position of the light, and the signal processor performs second correction of eliminating an influence of the light intensity distribution for the measurement data based on the second correction data before the first correction.