By employing an infrared vidicon,we constructed a near infrared absorption imaging system. It was used to obtain the two dimensional distribution of the amount of organic and inorganic substances including -OH, -CH, and -NH groups. These groups absorb near infrared light at the different wavelengths. Therefore it is possible to obtain the separate images of the substances including the different groups. On the other hand, since the substances have the different penetration depths of light, the two dimensional analysis of the depth profiles is also possible. The calibration methods to cancel the instrumental characteristics and to remove the surface scattering effect are also presented.
