Patent US3867020A successfully refreshed from Google Patents.
US3867020A
Expired / Lapsed
US
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Controlled light limiting lens assembly
Assignee: Individual
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Filing: 1973-12-17
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Granted: 1975-02-18
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Expires: 1993-12-17
Abstract
Abstract A controlled light-limiting lens assembly useful as a fishing aid includes a first lens member in the form of a sheet of louvered material provided with a central aperture which defines a limited angle of light acceptance disposed along a line of sight. The louvered material prevents the passage of light having an angle of incidence relative to the louvered lens material greater than the angle of light acceptance. A second lens member is provided which is made of a polarized material and disposed juxtaposed in a plane substantially parallel to that defined by the first lens member along the line of sight. The central aperture in the first lens member and the second lens member are aligned along the line of sight and the second lens member is rotatably mounted relative to the first lens member. In this manner, the light transmitted through the lens assembly is further limited by selection of a single angle of polarization of light incident within the predetermined angle of light acceptance. A pair of eyeglasses is described which incorporates the above described light limiting lens assemblies in each of the frame member portions adapted to be placed in front of a viewer'' s eyes.
Inventors
- 👤 Harold N Braunhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:05
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/16; G02C7/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
150 words
A light-limiting lens assembly comprising a first lens member in the form of a sheet of louvered material provided with a central aperture which defines a limited angle of light acceptance disposed along a line of sight, said louvered material preventing the passage of light having an angle of incidence greater than said angle of light acceptance relative to said first lens member; and a second lens member made of a polarized material and disposed juxtaposed in a plane substantially parallel to that defined by said first lens member along the line of sight, said central aperture and said second lens member being aligned along the line of sight, and said second lens member being rotatable relative to said first lens member, whereby the light transmitted through the lens assembly is further limited by selection of a single angle of polarization of light incident within said angle of light acceptance.
Claim 2
Dependent Claim
150 words
A light-limiting lens assembly comprising a first lens member in the form of a sheet of louvered material provided with a central aperture which defines a limited angle of light acceptance disposed along a line of sight, said louvered material preventing the passage of light having an angle of incidence greater than said angle of light acceptance relative to said first lens member; and a second lens member made of a polarized material and disposed juxtaposed in a plane substantially parallel to that defined by said first lens member along the line of sight, said central aperture and said second lens member being aligned along the line of sight, and said second lens member being rotatable relative to said first lens member, whereby the light transmitted through the lens assembly is further limited by selection of a single angle of polarization of light incident within said angle of light acceptance.
Claim 3
Dependent Claim
74 words
A light limiting assembly as defined in claim 1, wherein said louvered material is made of a transparent sheet; and an array of spaced opaque elements disposed within said sheet, said opaque elements being disposed parallel to each other and generally parallel to the line of sight, whereby said opaque elements only impair the tramsmission of light having an angle of incidence greater than a predetermined value relative to the plane of said sheet.
Claim 4
Dependent Claim
22 words
A light limiting assembly as defined in claim 2, wherein said opaque elements are in the form of elongate parallel flat strips.
Claim 5
Dependent Claim
25 words
A light limiting assembly as defined in claim 2, wherein said opaque elements are in the form of a plurality of spaced concentric circular strips.
Claim 6
Dependent Claim
76 words
A light limiting assembly as defined in claim 1, further comprising a frame member which supports the lens assembly, said frame member comprising an annular lens mount adapted to receive said first lens member, and an annular ring rotatably mounted on said lens mount and adapted to receive said second lens member, whereby said second lens member can be rotated relative to said second lens member by rotating said annular ring relative to said lens mount.
Claim 7
Dependent Claim
30 words
A light limiting assembly as defined in claim 5, wherein said lens mount and said annular ring are provided with annular recessed seats adapted to receive said respective lens members.
Claim 8
Dependent Claim
85 words
A light limiting assembly as defined in claim 1, further comprising a frame member which supports the lens assembly, said frame member comprising an annular lens mount adapted to receive said first lens member, an annular ring adapted to receive said second lens member, and coupling means for rotatably mounting said annular ring on said lens mount, whereby said coupling means permits said second lens member to rotate relative to said first lens member by rotation of said annular ring relative to said lens mount.
Claim 9
Dependent Claim
63 words
A light-limiting lens assembly as defined in claim 7, wherein said coupling means comprises a circular annular projection on one of said lens mount and annular ring, and a circular annular on the other of said lens mount and annular ring, said annular projection being disposed within said annular recess with some clearance to permit sliding movement of the former within the latter.
Claim 10
Dependent Claim
74 words
A pair of eyeglasses as defined in claim 9, wherein said louvered material is made of a transparent sheet; and an array of spaced opaque elements disposed within said sheet, said opaque elements being disposed parallel to each other and generally parallel to the line of sight, whereby said opaque elements only impair the transmission of light having an angle of incidence greater than a predetermined value relative to the plane of said sheet.
Claim 11
Dependent Claim
22 words
A pair of eyeglasses as defined in claim 10, wherein said opaque elements are in the form of elongate parallel flat strips.
Claim 12
Dependent Claim
25 words
A pair of eyeglasses as defined in claim 10, wherein said opaque elements are in the form of a plurality of spaced concentric circular strips.
Claim 13
Dependent Claim
69 words
A pair of eyeglasses as defined in claim 9, wherein said fixed portions are annular lens mounts adapted to receive said first lens member, and said movable portions are annular rings rotably mounted on said lens mounts and adapted to receive said second lens members, whereby said second lens members can be rotated relative to said second lens members by rotating said annular rings relative to said lens mounts.
Claim 14
Dependent Claim
30 words
A pair of eyeglasses as defined in claim 13, wherein said lens mount and said annular ring are provided with annular recessed seats adapted to receive said respective lens members.
Claim 15
Dependent Claim
81 words
A pair of eyeglasses as defined in claim 9, wherein said fixed portions are annular lens mounts adapted to receive said first lens members, said movable portions are annular rings adapted to receive said second lens members, and coupling means for rotatably mounting said annular rings on respective ones of said lens mounts, whereby said coupling means permits said second lens member to rotate relative to said first lens member by rotation of said annular ring relative to said lens mount.
Claim 16
Dependent Claim
64 words
A pair of eyeglasses as defined in claim 15, wherein said coupling means comprises a circular annular projection on one of said lens mount and annular ring, and a circular annular recess on the other of said lens mount and annular ring, said annular projection being disposed within said annular recess with some clearance to permit sliding movement of the former within the latter.
References Cited (Backward Citations)
US2773422A
Cited
US3791722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |