Patent US3602575A successfully refreshed from Google Patents.
US3602575A
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Multiple wavelength optical isolator
Assignee: American Optical Corp
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Filing: 1969-07-02
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Granted: 1971-08-31
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Expires: 1989-07-02
Abstract
Abstract A multiple wavelength optical isolator provides isolation for the light characteristic of either a neodymium glass laser, 1.06 Mu m., or ruby, 0.6943 Mu m. by immersion in either liquid nitrogen or the combination of dry ice and acetone respectively. The isolator includes a piece of silicate glass doped with 58 weight percent of terbium oxide which is subjected to the field of a permanent magnet of approximately 1100 gauss parallel to the path of light in the glass. The thickness of glass in this dimension is approximately 7.7 cm.
Inventors
- 👤 Charles Gilbert Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:14
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/09
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
33 words
A multiple wavelength optical isolator according to claim 1, in which the thickness of the piece of glass is 7.7 cm. and the glass is doped with 58 weight percent of terbium oxide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |