Abstract: An image forming device including a toner holder 10 and a toner passage control device 4 including a plurality of toner passage holes 14 for controlling the passage of a toner 3, wherein a spacer member 22 arranged between the toner holder 10 and the toner passage control device 4 for maintaining the distance therebetween to be substantially constant has a predetermined surface roughness and a predetermined hardness while having a rigidity such that irregularities on the surface of the toner passage control device 4 are not transferred onto a toner layer 3a, so as to prevent the toner layer 3a on the toner holder 10 from being scratched and to form a high-quality image both in an initial stage of a recording operation and in a long-term use.

Abstract: The light reflection pattern 22 is formed on a surface of the substrate 21. The light reflection pattern 22 is formed at an area that contains positions at which the Y lamp 12 and M lamp 13 are attached. The light reflection pattern 22 is composed of an ink layer by silk screen printing. The printing is performed along with other patterns such as an identification number, part name, and part attached position of the substrate 21. According to the constitution, it is possible to reduce the number of parts along with the number of assembling processes, and further possible to reduce the cost and labor time needed for the manufacturing and maintenance.

Abstract: The optical scanner of this invention includes a light source, an optical deflector for scanning a light flux from the light source, a first image formation optical system disposed between the light source and the optical deflector, and a second image formation optical system disposed between the optical deflector and a surface to be scanned. The second image formation optical system includes a curved mirror for reflecting a light flux from the optical deflector and a correction lens for converging the light flux from the curved mirror on the surface to be scanned. A refractive power in the sub-scanning direction at the center of the correction lens in the scanning direction is different from that at the periphery thereof.