Patent ID: 6947190

Claim:
An optical scanning apparatus comprising: a first optical member for receiving a plurality of light beams with an interval and for causing a first group of beams to emerge with a narrower interval, said first optical member being rotatable to adjust the interval of the beams emergent therefrom; a second optical member for receiving at least one second light beam and the first group of beams emergent from said first optical member with an interval and for causing a third group of beams to emerge with a narrower interval, said second optical member being rotatable to change the interval between the first group of beams and the at least one second beam; a third optical member for receiving a plurality of beams with an interval and for causing a second group of beams with a narrower interval, wherein the at least one second light beam comprises the second group of beams; and deflecting means for scanningly deflecting the third group of beams emergent from said second optical member.