JP2005266827A5 - - Google Patents

Claims (8)

Light source means, deflection means for deflecting a plurality of light beams emitted from the light source means, scanning optical means for imaging a plurality of light beams deflected by the deflection means on a surface to be scanned, and deflection by the deflection means A multi-beam scanning device having synchronization detecting means for detecting a part of the plurality of light fluxes ,
The synchronization detection means has synchronization position determination means formed of a plastic material mixed with glass fiber that determines the timing of synchronization detection, and is separate from the scanning optical means between the deflection means and the synchronization detection means. Having optical means for body synchronization detection;
The focal length of the scanning optical means in the main scanning direction is fk (mm), the focal length of the synchronization detecting optical means in the main scanning direction is fb (mm), and the unevenness difference in the main scanning direction of the synchronization position determining means is Lm. (Mm), when the pixel density in the main scanning direction on the scanned surface is Am (dpi),
0 (mm) <Lm ≦ (25.4 / Am / 3) × (fb / fk)
fk> fb
A multi-beam scanning device characterized by satisfying the following conditions. Light source means, deflection means for deflecting a plurality of light beams emitted from the light source means, scanning optical means for imaging a plurality of light beams deflected by the deflection means on a surface to be scanned, and deflection by the deflection means A multi-beam scanning device having synchronization detecting means for detecting a part of the plurality of light fluxes ,
The synchronization detection means has synchronization position determination means formed of a plastic material mixed with glass fiber that determines the timing of synchronization detection.
When the unevenness difference in the main scanning direction of the synchronization position determining means is Lm (mm) and the pixel density in the main scanning direction on the scanned surface is Am (dpi),
Lm ≦ (25.4 / Am / 3)
A multi-beam scanning device characterized by satisfying the following conditions. Light source means, deflection means for deflecting a plurality of light beams emitted from the light source means, scanning optical means for imaging a plurality of light beams deflected by the deflection means on a surface to be scanned, and deflection by the deflection means A multi-beam scanning device having synchronization detecting means for detecting a part of the plurality of light fluxes ,
The synchronization detection means has synchronization position determination means formed of a plastic material mixed with glass fiber that determines the timing of synchronization detection.
The material of the edge of the synchronous position determining means for scanning the plurality of light beams at different positions in the sub-scanning direction is formed of a plastic material not containing glass fiber, or a metal or a vinyl. Multi-beam scanning device. Light source means, deflection means for deflecting a plurality of light beams emitted from the light source means, scanning optical means for imaging a plurality of light beams deflected by the deflection means on a surface to be scanned, and deflection by the deflection means A multi-beam scanning device having synchronization detecting means for detecting a part of the plurality of light fluxes ,
The multi-beam scanning device according to claim 1, wherein an edge of the synchronization detecting means for scanning the plurality of light beams at different positions in the sub-scanning direction is etched. A multi-beam scanning device according to any one of claims 1 to 4, wherein a photosensitive member disposed on the scanned surface, formed on said photosensitive member by a light beam scanned by said multi-beam scanning device A developing device that develops the electrostatic latent image as a toner image, a transfer device that transfers the developed toner image onto a transfer material, and a fixing device that fixes the transferred toner image onto the transfer material. An image forming apparatus. 5. The multi-beam scanning device according to claim 1, and a printer controller that converts code data input from an external device into an image signal and inputs the image signal to the multi-beam scanning device. An image forming apparatus. A plurality of multi-beam scanning devices each comprising the multi-beam scanning device according to any one of claims 1 to 4, and an image of a color different from each other, arranged on a scanned surface of each multi-beam scanning device. A color image forming apparatus comprising: a plurality of image carriers to be formed. 8. The color image forming apparatus according to claim 7, further comprising: a printer controller that converts color signals input from an external device into image data of different colors and inputs the image data to each multi-beam scanning device.