Patent ID: 9176449
Filing Date: 2015-11-03
Classification: G03G

Abstract:
1. A wet-type image forming apparatus comprising: an image carrier; a toner developer layer formed of toner and a carrier liquid carried on said image carrier; and a toner amount detection unit for detecting a toner amount of the toner developer layer carried on said image carrier, said toner amount detection unit including: a light-emitting unit for emitting light to the toner developer layer carried on said image carrier and a light-receiving unit for receiving reflected light when light is emitted from said light-emitting unit to the toner developer layer carried on said image carrier, wherein wavelength characteristics of a light emission intensity of said light-emitting unit and a light reception sensitivity of said light-receiving unit are set such that an intensity of detection sensitivity of said toner amount detection unit in accordance with a product of a light emission intensity of said light-emitting unit and a light reception sensitivity of said light-receiving unit is greater in a wavelength region in which a characteristic value based on a product of a transmittance of the toner developer layer and a reflectivity of said image carrier as a reference for a light emission wavelength is included in a predetermined range, than in other wavelength regions.