| 摘要 |
A multibeam scanning apparatus capable of changing magnification is is provided with a light source part, an afocal zoom lens, a first anamorphic optical system and a second anamorphic optical system. The light source part generates a plural number of collimated light beams and the afocal zoom lens changes the angular magnification of the collimated light beams. The first anamorphic optical system forms linear images from the beams transmitted through the afocal zoom lens. The linear images are parallel with the plane defined by the light beams as deflected by a deflector. The second anamorphic optical system is disposed between the deflector and a surface to be scanned to form good scanning spots on the scanned surface from the linear images on the reflecting surface of the deflector.
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