| US 7,492,495 B2 | ||
| Optical scanning apparatus and scanning image display apparatus | ||
| Keiichiro Ishihara, Yokohama (Japan); and Shigehiro Kadota, Machida (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Jan. 22, 2007, as Appl. No. 11/625,354. | ||
| Claims priority of application No. 2006-016218 (JP), filed on Jan. 25, 2006. | ||
| Prior Publication US 2007/0171497 A1, Jul. 26, 2007 | ||
| Int. Cl. G02B 26/08 (2006.01) | ||
| U.S. Cl. 359—202 [359/198; 359/199; 359/214] | 5 Claims |
| 1. An optical scanning apparatus comprising:
a light source;
deflecting means for deflecting a light beam emitted from the light source two-dimensionally in a first direction and a second
direction, deflection speed of the deflecting means being higher in the first direction than in the second direction, and
the apparatus scanning a surface to be scanned two-dimensionally with a deflected light beam deflected by the deflecting means
in such a way that scanning loci in scanning in the first direction are arranged along the second direction,
wherein the deflecting means is driven in such a way that its angular velocity in the second direction is smaller when optically
scanning a position on the surface to be scanned at which the angle of incidence of the deflected light beam in the second
direction is large than when optically scanning a position on said surface to be scanned at which the angle of incidence of
the deflected light beam in said second direction is small, and
wherein a light beam travelling to a center of a scanning range of the surface to be scanned is obliquely incident on the
surface to be scanned.
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