Optical element holder, light scanning unit, and image forming apparatus with accommodation for heat-related dimensional changes of optical element
First Claim
Patent Images
1. An optical element holder, comprising:
- a holding frame having end surfaces provided spaced apart by a specific distance from end portions of a correction lens in a longitudinal direction by deeming a light scanning direction as the longitudinal direction and having at least first and second side surfaces disposed to cover the correction lens except for at least an incident portion and an exiting portion of light; and
at least one pushing member disposed so that the correction lens is between a part of the pushing member and the first side surface of the holding frame and being configured so that the pushing member pushes the correction lens toward the first side surface of the holding frame.
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Abstract
An optical element holder is provided with a holding frame having a side surface provided spaced apart by a specific distance from an end portion of the correction lens in a longitudinal direction by deeming a light scanning direction as the longitudinal direction and holding the correction lens so as to cover the correction lens except for at least an incident portion and an exiting portion of light, and a pushing member that pushes the correction lens toward the holding frame, so that displacement in the light scanning direction due to heat of the optical element is lessened.
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Citations
20 Claims
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1. An optical element holder, comprising:
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a holding frame having end surfaces provided spaced apart by a specific distance from end portions of a correction lens in a longitudinal direction by deeming a light scanning direction as the longitudinal direction and having at least first and second side surfaces disposed to cover the correction lens except for at least an incident portion and an exiting portion of light; and at least one pushing member disposed so that the correction lens is between a part of the pushing member and the first side surface of the holding frame and being configured so that the pushing member pushes the correction lens toward the first side surface of the holding frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An optical element holder, comprising:
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a holding frame having end surfaces spaced apart by a specific distance from end portions of a correction lens in a longitudinal direction by deeming a light scanning direction as the longitudinal direction and having at least first and second side surfaces disposed to cover the correction lens except for at least an incident portion and an exiting portion of light; and pushing means for pushing the correction lens toward at least one of the first and second side surfaces of the holding frame. - View Dependent Claims (16, 17)
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18. A correction lens unit, comprising:
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an elongate correction lens having opposite end portions spaced apart along a longitudinal direction; a holding frame having end surfaces spaced apart by specified distances from the end portions of the correction lens in the longitudinal direction, the holding frame having at least first and second side surfaces disposed to cover the correction lens except for at least an incident portion and an exiting portion of light; at least one spring member disposed so that the correction lens is between a part of the spring member and at least one of the first and second side surfaces of the holding frame, the spring member being configured for pushing the correction lens toward at least one of the first and second side surfaces of the holding frame. - View Dependent Claims (19, 20)
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Specification