摘要:
A density measuring device includes a moving member that can be moved in a liquid, a light emitting member and a light receiving member that receives light emitted by the light emitting member. A gap part in which the moving member is disposed in a path of light emitted from the light emitting member can be moved. A density measuring unit measures the density of the liquid based on the result of output of the light receiving member for a case where the moving member is located in the path of light emitted from the light emitting member and a case where the moving member is not located in the path of light emitted from the light emitting member.
摘要:
A method of measuring density includes detecting movement of a moving member in a light path of light emitted from a light emitting member, measuring an output of a light receiving member for a case where the moving member is moved in the light path, as a first output, detecting that the moving member is not in the light path, measuring an output of the light receiving member for a case where the moving member is not in the light path, as a second output, and calculating density based on the first output and the second output.
摘要:
The invention provides an image forming apparatus and an image forming method capable of smoothly and reasonably conducting image formation in case of using a lens (lenses) of which optical magnification is minus. An image forming apparatus of the invention comprises: a line head having lenses of which optical magnification is minus and a light emitter array in which a plurality of light emitting elements are aligned. The lenses are plural in an axial direction (main scanning direction) of an image carrier and a direction (sub scanning direction) perpendicular to the axial direction. A light emitter block composed of “m×n” (in number) light emitting elements is disposed relative to each lens. The “m×n” light emitting elements comprises “n” (in number) light emitting element lines arranged in the direction perpendicular to the axial direction and each light emitting element line includes “m” (in number) light emitting elements aligned in the axial direction. The image forming apparatus further comprises: a control means for actuating the respective light emitting elements to emit lights to be inversed in the axial direction and the direction perpendicular to the axial direction to form an image on the image carrier. In this manner, images of plural colors are formed on the image carrier at once.