FURNACE INTERIOR MONITORING DEVICE

摘要

Disclosed is a furnace interior monitoring device (21) which monitors the interior of a furnace in which radiant light is emitted, being equipped with a laser illumination device (100) that illuminates the side walls of the furnace with laser light and a light-receiving device (200) that receives laser light reflected from the side walls of the furnace. The light-receiving device (200) is equipped with an optical filter (15) that transmits laser light and light of a prescribed wavelength region within the wavelength region corresponding to red light of the three primary colors; and an image-forming device (8) that forms an image of the side walls of the furnace based on light that includes the reflected laser light that passes through the optical filter (15).