Optical scanning device
AssigneeCanon Kabushiki Kaisha
InventorsJun Nagatoshi, Mitsuhiro Ohta, Shunsuke Tanaka
Life of this patent
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Abstract
In one embodiment, an optical scanning device includes a board and a light receiving member, the positional accuracy of which is improved. When a length in a scanning direction and a length in an intersection direction of a body portion of the light receiving member are denoted by Lx0 and Ly0, respectively, and a length in the scanning direction and a length in the intersection direction of a through-hole formed in the board are denoted by Lx1 and Ly1, respectively, the lengths Lx0, Ly0, Lx1, and Ly1 satisfy the following formula: (Lx1−Lx0)>(Ly1−Ly0).
Claims14
An optical scanning device comprising:
- a light source;
- a deflection unit configured to deflect a light beam emitted from the light source;
- a board;
- and
- a light receiving member including a body portion, which includes a light receiving portion, and a first terminal portion and a second terminal portion, each of which is soldered to the board,
- wherein the light receiving portion receives the light beam deflected by the deflection unit and moving in a scanning direction,
- wherein the first terminal portion and the second terminal portion are located opposite each other across the body portion in an intersection direction that intersects with the scanning direction as viewed in a normal direction to a mounting surface of the board,
- wherein the board has a through-hole formed thereon, into which at least a part of the body portion is inserted, and includes a first soldering portion soldered to the first terminal portion and a second soldering portion soldered to the second terminal portion, the first soldering portion and the second soldering portion being located opposite each other across the through-hole in the intersection direction, and
- wherein, when a length in the scanning direction and a length in the intersection direction of the body portion are denoted by Lx0 and Ly0, respectively, and a length in the scanning direction and a length in the intersection direction of the through-hole are denoted by Lx1 and Ly1, respectively, the lengths Lx0, Ly0, Lx1, and Ly1 satisfy the following formula:
- (Lx1−Lx0)>(Ly1−Ly0).
An optical scanning device comprising:
- a light source;
- a deflection unit configured to deflect a light beam emitted from the light source;
- a board having a through-hole formed thereon;
- and
- a light receiving member including a light receiving portion and mounted on the board,
- wherein the light receiving member receives the light beam that has entered the through-hole while being deflected by the deflection unit and moving in a scanning direction, and
- wherein the light receiving portion is located in a position which is downstream of the center of the light receiving member with respect to the scanning direction and which allows no light beam reflected from an inner wall of the through-hole to be incident on the light receiving portion.
Dependencies are inferred from the claim text.