Annual optical spacer, image lens system, and mobile terminal
First Claim
1. An annular optical spacer configured to be disposed between two lens elements for providing an optical space between the two lens elements, the annular optical spacer comprising:
- a first side portion;
a second side portion opposite to the first side portion;
a central through hole coaxial with a central axis of the annular optical spacer;
an outer annular portion disposed around the central through hole and connecting the first side portion with the second side portion;
an inner annular portion disposed around the central through hole and connecting the first side portion with the second side portion, wherein a vertical distance between the inner annular portion and the central axis of the annular optical spacer is shorter than a vertical distance between the outer annular portion and the central axis of the annular optical spacer, and the inner annular portion comprises;
at least one rugged surface comprising a plurality of annular protruding structures, wherein the annular protruding structures are coaxially arranged around the central axis; and
an anti-reflective layer on top of the rugged surface;
wherein the annular optical spacer is made of opaque plastic material;
wherein a diameter of the central through hole decreased along the rugged surface from the second side portion to the first side portion;
wherein each of the annular protruding structures is arc-shaped, a maximum width of each of the annular protruding structures is L, a curvature radius of each of the annular protruding structures is R, and the following relationship is satisfied;
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2 Assignments
0 Petitions
Accused Products
Abstract
An annular optical spacer includes a first side portion, a second side portion, an outer annular portion, an inner annular portion and an anti-reflective layer. The second side portion is opposite to the first side portion. The outer annular portion connects the first side portion with the second side portion. The inner annular portion connects the first side portion with the second side portion. A vertical distance between the inner annular portion and a central axis of the annular optical spacer is shorter than a vertical distance between the outer annular portion and the central axis of the annular optical spacer. The inner annular portion includes at least one rugged surface. The rugged surface includes a plurality of annular protruding structures, and the annular protruding structures are coaxially arranged around the central axis. The anti-reflective layer is on top of the rugged surface.
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Citations
21 Claims
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1. An annular optical spacer configured to be disposed between two lens elements for providing an optical space between the two lens elements, the annular optical spacer comprising:
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a first side portion; a second side portion opposite to the first side portion; a central through hole coaxial with a central axis of the annular optical spacer; an outer annular portion disposed around the central through hole and connecting the first side portion with the second side portion; an inner annular portion disposed around the central through hole and connecting the first side portion with the second side portion, wherein a vertical distance between the inner annular portion and the central axis of the annular optical spacer is shorter than a vertical distance between the outer annular portion and the central axis of the annular optical spacer, and the inner annular portion comprises; at least one rugged surface comprising a plurality of annular protruding structures, wherein the annular protruding structures are coaxially arranged around the central axis; and an anti-reflective layer on top of the rugged surface; wherein the annular optical spacer is made of opaque plastic material; wherein a diameter of the central through hole decreased along the rugged surface from the second side portion to the first side portion; wherein each of the annular protruding structures is arc-shaped, a maximum width of each of the annular protruding structures is L, a curvature radius of each of the annular protruding structures is R, and the following relationship is satisfied;
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1.65. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An image lens system, comprising:
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a barrel, a lens assembly disposed in the barrel; and an annular optical spacer disposed in the barrel and connected with the lens assembly, wherein the annular optical spacer is configured to be disposed between two lens elements for providing an optical space between the two lens elements, and the annular optical spacer comprises; a first side portion; a second side portion opposite to the first side portion; a central through hole coaxial with a central axis of the annular optical spacer; an outer annular portion disposed around the central through hole and connecting the first side portion with the second side portion; an inner annular portion disposed around the central through hole and connecting the first side portion with the second side portion, wherein a vertical distance between the inner annular portion and the central axis of the annular optical spacer is shorter than a vertical distance between the outer annular portion and the central axis of the annular optical spacer, and the inner annular portion comprises; at least one rugged surface comprising a plurality of annular protruding structures, wherein the annular protruding structures are coaxially arranged around the central axis and integrated with the rugged surface; and an anti-reflective layer on top of the rugged surface; wherein the annular optical spacer is made of opaque plastic material; wherein a diameter of the central through hole decreased along the rugged surface from the second side portion to the first side portion; wherein each of the annular protruding structures is arc-shaped, a maximum width of each of the annular protruding structures is L, a curvature radius of each of the annular protruding structures is R, and the following relationship is satisfied;
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1.65. - View Dependent Claims (16, 17, 18, 19)
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20. An annular optical spacer having a central axis and configured to be disposed between two lens elements which have a common optical axis, wherein the central axis of the annular optical spacer is coincident with the optical axis of the two lens elements, and the annular optical spacer comprises:
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an inner annular portion, wherein the inner annular portion is ring-shaped and formed completely about the central axis of the annular optical spacer, and the inner annular portion has an inner surface defining a central through hole of the annular optical spacer, and an outer surface opposite to the inner surface; an outer annular portion, wherein the outer annular portion is ring-shaped and formed completely about the central axis, and has an inside surface connected to the outer surface of the inner annular portion, an outside surface opposite to the inside surface thereof; wherein the inner annular portion comprises a first face that extends from the inner surface to the outer surface thereof on one side of the inner annular portion in a direction away from the central axis of the annular optical spacer, and a second face that extends from the inner surface to the outer surface thereof on an opposite side of the inner annular portion; wherein the first face of the inner annular portion comprises a plurality of annular protruding structures, wherein each of the annular protruding structures is arc-shaped and the annular protruding structures are connected end-to-end along the first face of the inner annular portion; wherein the annular protruding structure closest to the inner surface of the inner annular portion is spaced apart in an axial direction of the annular optical spacer from the annular protruding structure closest to the outer surface of the inner annular portion; wherein an anti-reflective layer is disposed on top of the annular protruding structures; wherein a maximum width of each of the annular protruding structures is L, a curvature radius of each of the annular protruding structures is R, and the following relationship is satisfied;
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1.65. - View Dependent Claims (21)
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Specification