US3887724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making high contrast fiber optic phosphor screen
Assignee: United States Department of the Army
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Filing: 1973-12-06
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Granted: 1975-06-03
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Expires: 1993-12-06
Abstract
Abstract A method of making a fiber optic phosphor screen having high contrast capability in which the phosphor layer is arrayed only over the elemental fiber cores and not over the area of the cladding material surrounding the fiber optic cores.
Inventors
- 👤 Nicholas A Diakides
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:04
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/04; G02B6/06; G02B6/08; H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/892; H01J9/00; H01J9/20; H01J9/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
A METHOD OF PRODUCING A HIGH CONTRAST FIBER OPTIC ARRAYED PHOSPHOR SCREEN COMPRISING THE STEPS OF: IMMERSING IN A PHOTOSENSITIVE SOLUTION A FIBER OPTIC SUBSTRATE COMPOSED OF A PLURLITY OF FIBER OPTIC CORE ELEMENTS SURROUNDED BY CLADDING MATERIAL; ADDING PHOSPHOR TO SAID SOLUTION AND ALLOWING THE PHOSPHOR TO SETTLE ONTO THE SURFACE OF SAID SUBSTRATE TO A DESIRED THICKNESS; DIRECTING ULTRAVIOLET RADIATION FROM THE SIDE OPPOSITE THE PHOSPHOR COATED SURFACE OF THE SUBSTRATE, SAID RADIATION PASSING THROUGH SAID FIBER OPTIC CORE ELEMENTS TO THE PHOSPHOR LAYER; AND REMOVING THE SOFT PHOSPHOR WHICH WAS NOT EXPOSED TO THE ULTRAVIOLET RADIATION AND WHICH REMAINS OVER THE CLADDING THEREBY FORMING SAID ARRAYED PHOSPHOR SCREEN.
Claim 2
Independent Claim
111 words
A METHOD OF PRODUCING A HIGH CONTRAST FIBER OPTIC ARRAYED PHOSPHOR SCREEN COMPRISING THE STEPS OF: IMMERSING IN A PHOTOSENSITIVE SOLUTION A FIBER OPTIC SUBSTRATE COMPOSED OF A PLURLITY OF FIBER OPTIC CORE ELEMENTS SURROUNDED BY CLADDING MATERIAL; ADDING PHOSPHOR TO SAID SOLUTION AND ALLOWING THE PHOSPHOR TO SETTLE ONTO THE SURFACE OF SAID SUBSTRATE TO A DESIRED THICKNESS; DIRECTING ULTRAVIOLET RADIATION FROM THE SIDE OPPOSITE THE PHOSPHOR COATED SURFACE OF THE SUBSTRATE, SAID RADIATION PASSING THROUGH SAID FIBER OPTIC CORE ELEMENTS TO THE PHOSPHOR LAYER; AND REMOVING THE SOFT PHOSPHOR WHICH WAS NOT EXPOSED TO THE ULTRAVIOLET RADIATION AND WHICH REMAINS OVER THE CLADDING THEREBY FORMING SAID ARRAYED PHOSPHOR SCREEN.
Claim 3
Independent Claim
111 words
A method of producing a high contrast fiber optic arrayed phosphor screen comprising the steps of: immersing in a photosensitive solution a fiber optic substrate composed of a plurality of fiber optic core elements surrounded by cladding material; adding phosphor to said solution and allowing the phosphor to settle onto the surface of said substrate to a desired thickness; directing ultraviolet radiation from the side opposite the phosphor coated surface of the substrate, said radiation passing through said fiber optic core elements to the phosphor layer; and removing the soft phosphor which was not exposed to the ultraviolet radiation and which remains over the cladding thereby forming said arrayed phosphor screen.
Claim 4
Independent Claim
111 words
A method of producing a high contrast fiber optic arrayed phosphor screen comprising the steps of: immersing in a photosensitive solution a fiber optic substrate composed of a plurality of fiber optic core elements surrounded by cladding material; adding phosphor to said solution and allowing the phosphor to settle onto the surface of said substrate to a desired thickness; directing ultraviolet radiation from the side opposite the phosphor coated surface of the substrate, said radiation passing through said fiber optic core elements to the phosphor layer; and removing the soft phosphor which was not exposed to the ultraviolet radiation and which remains over the cladding thereby forming said arrayed phosphor screen.
References Cited (Backward Citations)
US3054672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |