Line head, image forming apparatus incorporating the same, and method of adjusting position of the same
AssigneeSeiko Epson Corporation
InventorsNozomu Inoue, Kiyoshi Tsujino
Life of this patent
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Abstract
In a line head, a plurality of light emitters are arrayed on a substrate in a first direction. Each of the light emitters is operable to emit a light beam. In a rod lens array, a plurality of rod lenses are arrayed in the first direction, and each of the rod lenses is adapted to focus the light beam emitted from an associated one of the light emitters onto a target surface. The substrate and the rod lens array are attached to a holder elongated in the first direction. Positioning members are provided at both end portions of the holder in the first direction. A relative position between the substrate and at least one of the positioning members is variable in a second direction perpendicular to the first direction.
Claims14
A method of adjusting a position of a line head comprising:
- a substrate;
- a plurality of light emitters, arrayed on the substrate in a first direction, each of which is operable to emit a light beam;
- a rod lens array, in which a plurality of rod lenses are arrayed in the first direction, and each of the rod lenses is adapted to focus the light beam emitted from an associated one of the light emitters onto a target surface;
- a holder, to which the substrate and the rod lens array are attached, the holder being elongated in the first direction;
- and positioning members, provided at both end portions of the holder in the first direction, wherein the substrate and the holder are movable in a second direction perpendicular to the first direction, wherein the method comprises:
- observing focused light spots formed by light beams emitted from at least two of the light emitters, thereby defining a first line connecting the focused light spots;
- defining a second line connecting the positioning members;
- and
- positioning at least one of the substrate and the holder such that the first line is made parallel with the second line.
A method of adjusting a position of a line head comprising:
- a substrate;
- a plurality of light emitters, arrayed on the substrate in a first direction, each of which is operable to emit a light beam;
- a rod lens array, in which a plurality of rod lenses are arrayed in the first direction, and each of the rod lenses is adapted to focus the light beam emitted from an associated one of the light emitters onto a target surface;
- a holder, to which the substrate and the rod lens array are attached, the holder being elongated in the first direction;
- and positioning members, provided at both end portions of the holder in the first direction, wherein the positioning members are movable in a second direction perpendicular to the first direction, wherein the method comprises:
- observing focused light spots formed by light beams emitted from at least two of the light emitters, thereby defining a first line connecting the focused light spots;
- defining a second line connecting the positioning members;
- and
- positioning the positioning members such that the first line is made parallel with the second line.
Dependencies are inferred from the claim text.