JP2005265904A5 - - Google Patents

Claims (9)

Comprising a light source means, a light deflector for deflecting a light beam emitted from said light source means, and an imaging optical system for imaging the light beam deflected by the deflecting surface of the optical deflector on a surface to be scanned, each In the optical scanning device having the scanning optical system ,
The optical deflector is commonly used for the plurality of scanning optical systems,
In each optical path of the plurality of scanning optical systems, at least one mirror is provided between the imaging optical system and the surface to be scanned,
In the main scanning section, the mirror located closest to the scanned surface among the at least one mirror is a concave shape or a convex shape corresponding to the direction of the surface normal of the mirror ,
In the main scanning section, among the mirrors arranged on the most scanned surface side of the plurality of scanning optical systems, the mirrors whose surface normals are in the same direction have the same shape. Scanning device. Comprising a light source means, a light deflector for deflecting a light beam emitted from said light source means, and an imaging optical system for imaging the light beam deflected by the deflecting surface of the optical deflector on a surface to be scanned, each In the optical scanning device having the scanning optical system ,
The optical deflector is commonly used for the plurality of scanning optical systems,
In each optical path of the plurality of scanning optical systems, at least one mirror is provided between the imaging optical system and the surface to be scanned, and the position is closest to the surface to be scanned among the at least one mirror. A mirror bending mechanism for bending the mirror is provided on the mirror to be
In the main scanning section, the mirror bending mechanism supports both ends of the mirror, presses one point outside the support point of the mirror, and forms a concave surface with respect to the incident light beam, and supports both ends of the mirror. It has one of the mechanisms that press one point between the points and form a convex surface with respect to the incident light beam, and the pressing position is a position equidistant from the support point,
The mirror provided the mirror bending mechanism is mainly in-scan section, the optical scanning device, characterized in that the concave or convex shape, to correspond to the orientation of the surface normal of the mirror. Claims in the main scanning direction in the scanning optical system adjacent the pressing position of the mirror at the sub-scan section, characterized in that it is set so as to be opposite direction with respect to the optical axis of the imaging optical system Item 3. The optical scanning device according to Item 2 . In the main scanning section, of the most of the surface to be scanned side arranged each of the mirrors of said plurality of scanning optical system, a mirror that the surface normal is the same direction, characterized in that consists of identical shape claims Item 4. The optical scanning device according to Item 2 or 3. Mirrors most disposed on the surface to be scanned side of each of the plurality of scanning optical system, 1 to claim, characterized in that said than imaging optical system is disposed at a position closer to the surface to be scanned side 5. The optical scanning device according to any one of 4 above. 6. The optical scanning device according to claim 1 , wherein the number of mirrors disposed after the imaging optical system is the same in each scanning optical system. When adjusting the scanning line curvature, the irradiation positions at three image heights on the respective axes and the outermost axis are measured with respect to the light beams of the plurality of scanning optical systems, and the measured irradiation positions are measured. calculating a scanning line bend amount of the scanning optical system from the data, the result of the calculated most the scanning line bending amount is the maximum of the scanning optical system as a reference of the scanning optical system in a direction that is corrected by the mirror bending mechanism 4. The optical scanning device according to claim 2, wherein the other scanning optical system is adjusted by the mirror bending mechanism so as to coincide with a scanning line bending amount of the reference scanning optical system.   A color image forming system comprising: a plurality of image carriers, each of which is disposed on a surface to be scanned of the optical scanning device according to claim 1 and forms images of different colors. apparatus.   9. The color image forming apparatus according to claim 8, further comprising a printer controller that converts color signals input from an external device into image data of different colors and inputs the converted image data to each optical scanning device.