Scanniing optical apparatus
AssigneeCanon Kabushiki Kaisha
InventorYoshihiro Ishibe
Life of this patent
Estimating the term…
Abstract
A scanning optical apparatus includes a light source, a deflector for deflecting a beam emitted from the light source, an optical device for guiding the beam emitted from the light source to the deflector, a stop member, provided in an optical path between the optical device and the deflector, for shaping a beam size of the beam having passed the optical device, the stop member having an aperture portion, an imaging device for guiding the beam deflected by the deflector onto a surface to be scanned, and a shade member, provided in the optical path between the stop member and the deflector, for intercepting a beam traveling in a central part of the stop member.
Claims12
A scanning optical apparatus comprising:
- light source means;
- deflecting means for deflecting a beam emitted from said light source means;
- optical means for guiding the beam emitted from said light source means to said deflecting means;
- a stop member, provided in an optical path between said optical means and said deflecting means, for shaping a beam size of the beam having passed said optical means, said stop member having an aperture portion;
- imaging means for guiding the beam deflected by said deflecting means onto a surface to be scanned;
- and
- a shade member, provided in the optical path between said stop member and said deflecting means, for intercepting a beam traveling in a central part of said stop member.
A laser beam printer apparatus comprising:
- light source means;
- deflecting means for deflecting a beam emitted from said light source means;
- optical means for guiding the beam emitted from said light source means to said deflecting means;
- a stop member, provided in an optical path between said optical means and said deflecting means, for shaping a beam size of the beam having passed said optical means, said stop member having an aperture portion;
- a recording medium;
- imaging means for guiding the beam deflected by said deflecting means onto a surface of said recording medium;
- and
- a shade member, provided in the optical path between said stop member and said deflecting means, for intercepting a beam traveling in a central part of said stop member.
Dependencies are inferred from the claim text.