Patent US4264349A successfully refreshed from Google Patents.
US4264349A
Expired / Lapsed
US
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Drawing optical waveguides by heating with laser radiation
Assignee: Corning Glass Works
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Filing: 1979-07-02
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Granted: 1981-04-28
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Expires: 1999-07-02
Abstract
Abstract In drawing an optical waveguide, the blank is heated by a beam of laser radiation which has substantially zero power from the axis of the blank to a prescribed radial position and substantially uniform power from that position to a greater radial position. A rotating spinner splits radiation from the laser into two rotating beams, the paths of which are made to be non-intersecting with the axis of the blank being drawn. A conical reflector forms the radiation into a circumferential beam through which the blank passes.
Inventors
- 👤 David S. Grey
- 👤 Robert A. Wey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:28
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/025; C03B37/029; B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/073; B23K26/0734; C03B2205/00; C03B2205/60; C03B2205/62; C03B2205/67
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A method of heat-treating comprising: providing a substantially continuous blank; producing laser radiation; splitting said radiation into beams which do not intersect the axis of said blank; forming in a plane normal to said blank beams of laser radiation having substantially zero power density from the axis of said blank to a prescribed radial position of said blank; heating the blank with said beam of laser radiation; and drawing said blank along the axis thereof.
Claim 2
Independent Claim
75 words
A method of heat-treating comprising: providing a substantially continuous blank; producing laser radiation; splitting said radiation into beams which do not intersect the axis of said blank; forming in a plane normal to said blank beams of laser radiation having substantially zero power density from the axis of said blank to a prescribed radial position of said blank; heating the blank with said beam of laser radiation; and drawing said blank along the axis thereof.
Claim 3
Dependent Claim
35 words
The method recited in claim 1 further comprising heating said blank to the drawing temperature of the materials thereof; and drawing the heated blank to reduce the cross-sectional area thereof to form an optical waveguide.
Claim 4
Dependent Claim
45 words
The method recited in claim 1 wherein said beams of laser radiation are circumferential with substantially zero power density from the axis of said blank to a prescribed radial position and with substantially uniform power density from said radial position to a greater radial position.
Claim 5
Dependent Claim
41 words
The method recited in claim 1 wherein said beams of laser radiation have a power density distribution with substantially zero power at the axis of said blank and with a substantially Gaussian power distribution about a prescribed radius of said blank.
Claim 6
Dependent Claim
29 words
The method recited in claim 1 further comprising forming said beams of laser radiation with a prescribed power density distribution as a function of axial position along said blank.
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 |