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US 6,285,482 B1Granted
Optical deflecting-scanning apparatus
AssigneeCanon Kabushiki Kaisha
InventorNobuaki Date
Life of this patent
Estimating the term…
Abstract
An optical deflecting-scanning apparatus includes a deflector for deflecting a light beam to scan, a driving device for rotationally driving the deflector, a cover having a cylindrical portion to cover a peripheral surface of the deflector and an annular slit provided in the cylindrical portion of the cover and extending in a circumferential direction of the deflector. The slit opens along the entire circumference of the deflector.
Claims26
An optical deflecting-scanning apparatus comprising:
- a deflector for deflecting a light beam to scan;
- driving means for rotationally driving said deflector;
- a cover having a cylindrical portion to cover a peripheral surface of said deflector;
- and
- an annular slit provided in said cylindrical portion of said cover and extending in a circumferential direction of said deflector, said slit opening along the entire circumference of said deflector,
- wherein said cover comprises a first cylindrical member for covering a top half of said deflector, and a second cylindrical member for covering a bottom half of said deflector, and wherein said annular slit is formed between said first and second cylindrical members, and
- wherein a part of said first cylindrical member is constructed so as to cover the outside of said second cylindrical member.
4 more elements
A scanning optical apparatus comprising:
- a light source portion;
- a deflector for deflecting a light beam from said light source portion to scan;
- driving means for rotationally driving said deflector;
- a cover having a cylindrical portion to cover a peripheral surface of said deflector;
- and
- an annular slit provided in said cylindrical portion of said cover and extending in a circumferential direction of said deflector, said slit opening along the entire circumference of said deflector,
- wherein said cover comprises a first cylindrical member for covering a top half of said deflector, and a second cylindrical member for covering a bottom half of said deflector, and wherein said annular slit is formed between said first and second cylindrical members, and
- wherein a part of said first cylindrical member is constructed so as to cover the outside of said second cylindrical member.
5 more elements
An image forming apparatus comprising:
- a light source portion;
- a deflector for deflecting a light beam from said light source portion to scan;
- a recording medium for receiving the light beam deflected to scan by said deflector;
- driving means for rotationally driving said deflector;
- a cover having a cylindrical portion to cover a peripheral surface of said deflector;
- and
- an annular slit provided in said cylindrical portion of said cover and extending in a circumferential direction of said deflector, said slit opening along the entire circumference of said deflector,
- wherein said cover comprises a first cylindrical member for covering a top half of said deflector, and a second cylindrical member for covering a bottom half of said deflector, and wherein said annular slit is formed between said first and second cylindrical members, and
- wherein a part of said first cylindrical member is constructed so as to cover the outside of said second cylindrical member.
6 more elements
An optical deflecting apparatus, comprising:
- a deflector capable of deflecting a light beam to scan;
- driving means for rotationally driving said deflector;
- a cover which covers said deflector;
- a wall provided between said deflector and said cover, said wall being located apart from said cover in the direction of the optical axis;
- and
- an annular slit provided in said wall, said slit extending along an entire circumference of said deflector.
3 more elements
An optical deflecting apparatus to be housed in a box which houses an fθ lens, comprising:
- a deflector capable of deflecting a light beam to scan;
- driving means for rotationally driving said deflector;
- a cover which covers said deflector and is adapted to be housed in the box;
- a wall provided between said deflector and said cover, said wall being located apart from said cover in the direction of the optical axis;
- and
- a slit provided in said wall.
3 more elements
An image forming apparatus comprising:
- (i) image-bearing means;
- and
- (ii) an optical deflecting apparatus located in a box, said optical deflecting apparatus comprising:
- a deflector capable of deflecting a light beam to scan;
- driving means for rotationally driving said deflector;
- a cover which covers said deflector and is housed in the box;
- a wall provided between said deflector and said cover, said wall being located apart from said cover in the direction of the optical axis;
- and
- a slit provided in said wall.
6 more elements
Dependencies are inferred from the claim text.