Lens unit, camera module and manufacturing method of lens unit
AssigneeHitachi Maxell, Ltd.
InventorsHiroyuki Hirata, Haruo Arai, Masatoshi Hashimoto, Masahiro Suzuki
Life of this patent
Estimating the term…
Abstract
To implement the alignment of lenses with a simple configuration or by a simple method. A lens unit includes a plurality of lenses each including a lens portion and a flange portion surrounding the lens portion, and a tube portion that holds the plurality of lenses successively arranged along an optical axis. The holder body includes first and second receive portions successively formed along the optical axis. The first receive portion holds the lenses by pressing the side of the flange portion that extends along the optical axis. The second receive portion receives the lens such that the lens can be moved in a direction crossing the optical axis.
Claims14
A lens unit comprising:
- a plurality of lenses each comprising a lens portion and a flange portion surrounding the lens portion;
- and
- a holder body that holds one lens and other lenses of the plurality of lenses that are successively arranged along an optical axis, wherein
- the holder body comprises first receive portions and a second receive portion successively formed along the optical axis,
- the first receive portions are shaped such that the first receive portions can receive the other lenses from a first direction that is parallel to the optical axis and receive them in a state where the received other lenses are press-fitted in the first receive portions so that the received other lenses are prevented from moving in a direction perpendicular to the optical axis by restricting the received other lenses in a radial direction thereof,
- the second receive portion is shaped such that the second receive portion can receive the one lens from a second direction which is opposite to the first direction and receive it in a state where the received one lens can be moved in the direction perpendicular to the optical axis,
- the first receive portions hold the other lenses,
- the second receive portion holds the one lens, and
- the flange portion of the one lens held within the second receive portion at least partially protrudes from an end of the second receive portion of the holder body in the first direction.
A method of manufacturing a lens unit comprising a holder body that holds one lens and other lenses each comprising a lens portion and a flange portion surrounding the lens portion, wherein the holder body comprises first and second receive portions successively formed along an optical axis, the first receive portions receive the other lenses in a state where the received other lenses are press-fitted in the first receive portions so that the received other lenses are prevented from moving in a direction perpendicular to the optical axis, the second receive portion receives the one lens in a state where the received one lens can be moved in the direction perpendicular to the optical axis, the method comprising:
- pressing the other lenses into the first receive portions of the holder body from a first direction which is parallel to the optical axis by applying a pressure;
- putting the one lens within the second receive portion of the holder body from a second direction which is opposite to the first direction and in a state where the one lens can be moved in the direction perpendicular to the optical axis;
- holding a jig against a side of the flange portion and thereby positioning the one lens in a place where an optical characteristic is optimized, the flange portion at least partially protruding from an end of the second receive portion of the holder body in the first direction when the one lens is put in the second receive portion;
- and
- fixedly-bonding the one lens located in the second receive portion to the second receive portion of the holder body.
A lens unit comprising:
- a plurality of lenses each comprising a lens portion and a flange portion surrounding the lens portion;
- and
- a holder body that holds one lens and other lenses of the plurality of lenses that are successively arranged along an optical axis, wherein
- the holder body comprises first receive portions and a second receive portion successively formed along the optical axis, the first receive portions being disposed in a first direction relative to the second receive portion,
- the first receive portions hold the other lenses in a state where the held other lenses are press-fitted in the first receive portions so that the received other lenses are prevented from moving in a direction perpendicular to the optical axis,
- the second receive portion holds the one lens,
- there is a space between the second receive portion and the one lens during an assemble process, whereas the one lens is fixedly-bonded to the second receive portion after the assemble process, the space allowing the one lens to be moved in the direction perpendicular to the optical axis, and
- the flange portion of the one lens at least partially protrudes from an end of the second receive portion of the holder body in a second direction which is opposite to the first direction.
Dependencies are inferred from the claim text.