Moisture sensor, moisture detector, and image forming apparatus

• Main Authors: OBA YOSHIHIRO, SUGAWARA SATORU, ISHII TOSHIHIRO, HOSHI FUMIKAZU
• Format: Patent
• Language: English
• Published: 13.10.2015
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MAGNETOGRAPHY; MEASURING; PHOTOGRAPHY; PHYSICS; TESTING

A moisture sensor for detecting moisture content of an object includes a light source to emit light having an infrared wavelength that is absorbed by water; an optical system to receive the light from the light source and output linearly polarized light having a first polarization direction in a direction toward the object, and to receive light scattered from the object and output linearly polarized light having a second polarization direction perpendicular to the first polarization direction in another direction other than the direction toward the object; and a photodetector to receive the linearly polarized light having the second polarization direction output from the optical system.