US4264130A
Expired / Lapsed
US
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Self-focusing fiber array
Assignee: Ricoh Co Ltd
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Filing: 1979-06-18
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Granted: 1981-04-28
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Expires: 1999-06-18
Abstract
Abstract A self-focusing fiber array comprises three rows of self-focusing fibers, which are most closely packed and each of the self-focusing fibers substantially satisfies an equation of ##EQU1## where n o is the refractive index at the center of the cross section of each of the self-focusing fibers and n(r) is the refractive index at a distance r from the center of the cross section and a is a positive constant, and each of the self-focusing fibers is equal in the length under a condition of ##EQU2## and each end surface of the self-focusing fibers is in the same plane.
Inventors
- 👤 Yukio Ogura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:15
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/0006; G02B3/0037; G02B3/0056; G02B3/0087; G02B6/00; G02B6/04; G02B6/06; G02B6/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
A self-focusing fiber array comprising a number of self-focusing fibers having a refractive index which substantially satisfies a relationship of ##EQU30## where n o is the refractive index at the center of the cross section of each of said self-focusing fibers and n(r) is the refractive index at a distance r from said center and a is a positive integer, said self-focusing fibers arranged in at least three rows under the closest packing conditions and the length of each of said self-focusing fibers being equally Z which satisfies a relationship of ##EQU31## and each end surface of said self-focusing fibers being in the same plane.
Claim 2
Dependent Claim
105 words
A self-focusing fiber array comprising a number of self-focusing fibers having a refractive index which substantially satisfies a relationship of ##EQU30## where n o is the refractive index at the center of the cross section of each of said self-focusing fibers and n(r) is the refractive index at a distance r from said center and a is a positive integer, said self-focusing fibers arranged in at least three rows under the closest packing conditions and the length of each of said self-focusing fibers being equally Z which satisfies a relationship of ##EQU31## and each end surface of said self-focusing fibers being in the same plane.
Claim 3
Dependent Claim
16 words
A self-focusing fiber array as in claim 1 wherein said fibers are arranged in three rows.
Claim 4
Dependent Claim
34 words
A self-focusing fiber array as in claim 2 wherein the first and second rows are offset with respect to each other and the first and third rows are aligned with respect to each other.
Claim 5
Dependent Claim
17 words
A self-focusing fiber array as in claim 1 wherein the fibers are held in a hardened adhesive.
Claim 6
Dependent Claim
29 words
A self-focusing fiber array as in claim 1 wherein the fibers are held in a hardened adhesive having a refractive index higher than the peripheral portions of the fibers.
Claim 7
Dependent Claim
54 words
A self-focusing fiber array as in claim 1 in a cathode ray tube apparatus, comprising a cathode ray tube having a fluorescent surface, a photoconductor drum, a charging corona charger, a development apparatus, and an image transfer corona charger; the said fiber array being positioned between said fluorescent surface and said drum photoconductor surface.
Claim 8
Dependent Claim
16 words
A self-focusing fiber array as in claim 6 wherein said fibers are arranged in three rows.
Claim 9
Dependent Claim
42 words
A self-focusing fiber array as in claim 6 wherein the end of said array is spaced from the surface of the drum by a sufficient space so that the end of the array is not smeared by toner on the drum surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |