Patent ID: 9140654
Filing Date: 2015-09-22
Classification: G01N

Abstract:
1. An inspection apparatus comprising: a light source configured to emit an inspection light; a table configured to mount an inspection target thereon; an illumination optical system configured to direct the inspection light from the light source toward the inspection target mounted on the table; an objective lens unit configured to gather transmitting or reflected light generated after the illumination optical system illuminates the inspection target with the inspection light; a light receiving unit configured to capture an optical image formed from the light illuminated through the objective lens unit; a chamber configured to house the table, the illumination optical system, the objective lens unit and the light receiving unit; a temperature adjustment unit configured to adjust a temperature in the chamber; and a gas supply unit configured to be connected to the objective lens unit to supply an inert gas into the objective lens unit from the outside of the chamber, wherein the gas supply unit disposed inside the chamber has a structure in which the temperature of the inert gas supplied into the objective lens unit becomes a predetermined temperature.