US3947089A
Expired / Lapsed
US
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Lead-bismuth glasses for acoustooptic and magnetooptic devices
Assignee: Kimble Glass Inc
•
Filing: 1975-05-05
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Granted: 1976-03-30
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Expires: 1995-05-05
Abstract
Abstract Disclosed are stable, homogeneous GeO 2 -B 2 O 3 -PbO-Bi 2 O 3 glass compositions having high indices of refraction, low sound velocities, low acoustic loss and high Verdet constants which render them useful in acoustooptic and magnetooptic devices.
Inventors
- 👤 James E. Rapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:37
CPC Classifications
G; G02; G02B; G02B1/00; C; C03; C03C; C03C3/00; C03C3/12; C03C3/122; C03C3/253; C03C4/00; C03C4/0057; G02F; G02F1/00; G02F1/0009; G02F1/0036; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/901
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
97 words
A homogeneous glass composition having an index of refraction of at least about 2.1, a longitudinal sound velocity of less than about 4 mm/μsec, an acoustic loss of less than about 6 db/cm at 20 MHz, a Verdet constant greater than about 0.10 min/Oe-cm at 0.63μ m and an optical loss of less than about 10% cm when measured at a wavelength between 1 and 2μm said glass consisting essentially of: Composition
Mole %
______________________________________
GeO.sub.2
5-32
B.sub.2 O.sub.3
1.5-18
PbO 30-60
Bi.sub.2 O.sub.3
10-41
______________________________________ wherein: Bi 2 O 3 +PbO ≧ 65% mole and ##EQU3##
Claim 2
Dependent Claim
97 words
A homogeneous glass composition having an index of refraction of at least about 2.1, a longitudinal sound velocity of less than about 4 mm/μsec, an acoustic loss of less than about 6 db/cm at 20 MHz, a Verdet constant greater than about 0.10 min/Oe-cm at 0.63μ m and an optical loss of less than about 10% cm when measured at a wavelength between 1 and 2μm said glass consisting essentially of: Composition
Mole %
______________________________________
GeO.sub.2
5-32
B.sub.2 O.sub.3
1.5-18
PbO 30-60
Bi.sub.2 O.sub.3
10-41
______________________________________ wherein: Bi 2 O 3 +PbO ≧ 65% mole and ##EQU3##
Claim 3
Dependent Claim
15 words
The glass composition of claim 1 wherein 1 ≦ PbO/Bi 2 O 3 ≦ 3.
Claim 4
Dependent Claim
14 words
The glass composition of claim 1 wherein PbO/Bi 2 O 3 is about 2.
Claim 5
Dependent Claim
25 words
The glass composition of claim 1 which consists essentially of: Component
Mole %
______________________________________
GeO.sub.2
9-30
B.sub.2 O.sub.3
2-15
PbO 34-54
Bi.sub.2 O.sub.3
20-35.
______________________________________
Claim 6
Dependent Claim
68 words
In a device for the acousto-optical modulation of a beam of electromagnetic radiation comprising a glass element, means for propagating longitudinal sonic wave through said element in a propagating a beam of electromagnetic radiation through said element in a predetermined direction so as to cause deflection of said beam by acousto-optical interaction with the sonic waves, the improvement wherein said glass element has the composition of claim 1.
Claim 7
Dependent Claim
73 words
In a device for the acousto-optical modulation of a beam of electromagnetic radiation comprising a glass element, means for propagating longitudinal sonic wave through said element in a predetermined direction, and means for propagating a beam of electromagnetic radiation through said element in a predetermined direction so as to cause deflection of said beam by acousto-optical interaction with the sonic waves, the improvement wherein said glass element has the composition of claim 2.
Claim 8
Dependent Claim
73 words
In a device for the acousto-optical modulation of a beam of electromagnetic radiation comprising a glass element, means for propagating longitudinal sonic wave through said element in a predetermined direction, and means for propagating a beam of electromagnetic radiation through said element in a predetermined direction so as to cause deflection of said beam by acousto-optical interaction with the sonic waves, the improvement wherein said glass element has the composition of claim 3.
Claim 9
Dependent Claim
73 words
In a device for the acousto-optical modulation of a beam of electromagnetic radiation comprising a glass element, means for propagating longitudinal sonic wave through said element in a predetermined direction, and means for propagating a beam of electromagnetic radiation through said element in a predetermined direction so as to cause deflection of said beam by acousto-optical interaction with the sonic waves, the improvement wherein said glass element has the composition of claim 4.
Claim 10
Dependent Claim
69 words
In a Faraday rotator comprising a light rotating glass element, means for directing a beam of polarized light through said element, means for impressing a magnetic field on said element, said field having a component in the direction of propagation of the light through the element, means for detecting the light transmitted through said element, the improvement wherein said light rotating glass element has the composition of claim 1.
Claim 11
Dependent Claim
69 words
In a Faraday rotator comprising a light rotating glass element, means for directing a beam of polarized light through said element, means for impressing a magnetic field on said element, said field having a component in the direction of propagation of the light through the element, means for detecting the light transmitted through said element, the improvement wherein said light rotating glass element has the composition of claim 2.
Claim 12
Dependent Claim
69 words
In a Faraday rotator comprising a light rotating glass element, means for directing a beam of polarized light through said element, means for impressing a magnetic field on said element, said field having a component in the direction of propagation of the light through the element, means for detecting the light transmitted through said element, the improvement wherein said light rotating glass element has the composition of claim 3.
Claim 13
Dependent Claim
69 words
In a Faraday rotor comprising a light rotating glass element, means for directing a beam of polarized light through said element, means for impressing a magnetic field on said element, said field having a component in the direction of propagation of the light through the element, means for detecting the light transmitted through said element, the improvement wherein said light rotating glass element has the composition of claim 4.
References Cited (Backward Citations)
US2853393A
Cited
US3810688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |