Lens array, lens unit, led head, exposure device, image forming device, reading device, method for manufacturing lens array, and forming die
AssigneeOki Data Corporation
InventorAkihiro YAMAMURA
Life of this patent
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Abstract
A lens array includes a plurality of lenses having respective optical axes that are approximately parallel to each other, wherein the plurality of lenses are configured in a direction approximately perpendicular to the optical axes and are formed integrally with each other, and a maximum inclination angle of a lens surface on each of a predetermined number of the plurality of lenses is less than or equal 50.8 degrees or less, the maximum inclination angle being defined as a maximum value of an angle formed by an optical axis and a normal line of a lens surface of one of the predetermined number of the plurality of lenses.
Claims20
A lens array, comprising:
- a plurality of lenses having respective optical axes that are approximately parallel to each other, wherein
- the plurality of lenses are configured in a direction approximately perpendicular to the optical axes and are formed integrally with each other, and
- a maximum inclination angle of a lens surface on each of a predetermined number of the plurality of lenses is less than or equal 50.8 degrees or less, the maximum inclination angle being defined as a maximum value of an angle formed by an optical axis and a normal line of a lens surface of one of the predetermined number of the plurality of lenses.
A forming die to be used for forming a lens array including a plurality of lenses having respective optical axes that are approximately parallel to each other, the forming die, comprising:
- separable first mold and second mold that form a cavity when clamped together for forming the lens array, wherein
- curved surfaces that correspond to lens surfaces of the plurality of lenses are formed in the first mold and the second mold, and
- a maximum inclination angle of one of the curved surfaces is 50.8 degrees or less, the maximum inclination angle being defined as a maximum value of an angle formed by a direction corresponding to an optical axis and a normal line of the one of the curved surfaces.
Dependencies are inferred from the claim text.