Lens retaining barrel
First Claim
1. A lens rotating barrel comprising:
- a cylindrical part for radially positioning a lens;
at least one abutment extending annularly from said cylindrical part for positioning the lens relative to a direction of an optical axis of the lens, said cylindrical part having a plurality of protrusions uniformly and circumferentially spaced around an interior thereof such that a circle inscribed within the protrusions has a diameter that is substantially the same as an outer diameter of the lens and has a center coincident with the optical axis of the lens, said at least one abutment extending radially inwardly a greater extent than the protrusions and having a plurality of seats uniformly and circumferentially spaced therearound for receiving thereon the lens, the seats having upper surfaces defining an envelope expanding in a direction substantially orthogonal to the optical axis of the lens, whereby the lens is retained in position by means of each of said plurality of protrusions of said cylindrical part and each of said upper surfaces of said seats; and
an adhesive located between the lens retaining barrel and the lens for securely holding the lens in the lens retaining barrel, the adhesive having a viscosity that enables the adhesive to permeate the lens and having resiliency when cured to achieve follow-up deformation to accurately maintain a position of the optical axis of the lens relative to the lens retaining barrel.
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Accused Products
Abstract
A lens retaining barrel includes a cylindrical part for radially positioning a lens and an abutment for positioning the lens in the direction of the optical axis of the lens. The cylindrical part has a multiplicity of protrusions uniformly and circumferentially spaced around the interior thereof such that a circle inscribed within the protrusions has the same diameter as the outer diameter of the lens and has its center coincident with the optical axis of the lens. The abutment extends radially inwardly a greater extent than the protrusions and has a multiplicity of seats uniformly and circumferentially spaced around the abutment for receiving the lens. The seats have tops defining an envelope extending in a direction orthogonal to the optical axis of the lens. The lens is retained in position by each protrusion of the cylindrical part and each top of the seats and is adhered to the lens retaining barrel by an adhesive. By virtue of this construction, the lens retaining barrel is free from any eccentricity or tilt of the lens, has a higher mounting accuracy, and is easy to assemble for mounting.
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Citations
21 Claims
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1. A lens rotating barrel comprising:
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a cylindrical part for radially positioning a lens; at least one abutment extending annularly from said cylindrical part for positioning the lens relative to a direction of an optical axis of the lens, said cylindrical part having a plurality of protrusions uniformly and circumferentially spaced around an interior thereof such that a circle inscribed within the protrusions has a diameter that is substantially the same as an outer diameter of the lens and has a center coincident with the optical axis of the lens, said at least one abutment extending radially inwardly a greater extent than the protrusions and having a plurality of seats uniformly and circumferentially spaced therearound for receiving thereon the lens, the seats having upper surfaces defining an envelope expanding in a direction substantially orthogonal to the optical axis of the lens, whereby the lens is retained in position by means of each of said plurality of protrusions of said cylindrical part and each of said upper surfaces of said seats; and an adhesive located between the lens retaining barrel and the lens for securely holding the lens in the lens retaining barrel, the adhesive having a viscosity that enables the adhesive to permeate the lens and having resiliency when cured to achieve follow-up deformation to accurately maintain a position of the optical axis of the lens relative to the lens retaining barrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A lens holder for holding a lens, comprising:
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a frame having a cylindrical wall defining a cylindrical opening and having forward and rearward ends for receiving a lens inserted axially through the forward end of the cylindrical wall into the cylindrical opening, the cylindrical wall having a plurality of circumferentially spaced protrusions protruding radially inwardly therefrom for radially positioning the lens within the cylindrical opening, the radial innermost parts of the protrusions lying on a circular locus having a diameter which is substantially the same as the outer diameter of the lens, and a plurality of abutments extending radially inwardly a greater extent than the protrusions and disposed within and circumferentially spaced around the cylindrical opening for axially positioning the lens therein, the axial forwardmost parts of the abutments lying in a plane which is substantially orthogonal to the optical axis of the lens; and an adhesive located between the lens retaining barrel and the lens for securely holding the lens in the lens retaining barrel, the adhesive having a viscosity that enables the adhesive to permeate the lens and having resiliency when cured to achieve follow-up deformation to accurately maintain a position of the optical axis of the lens relative to the lens retaining barrel. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification