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US4225459A
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Glasses having a low non-linear refractive index for laser applications
Assignee: Schott AG
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Filing: 1978-04-18
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Granted: 1980-09-30
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Expires: 1998-04-18
Abstract
Abstract Glass composition ranges are described which permit the introduction of laser activators into fluorphosphate glass with exceptionally high fluorine content while forming glasses of high crystallization stability and permitting the realization of large melt volumes. The high fluorine content imparts to the glasses an exceptionally low nonlinear refractive index n 2 down to O,4 ×10 -13 esu.
Inventors
- 👤 Marga Faulstich
- 👤 Walter Jahn
- 👤 Georg Krolla
- 👤 Norbert Neuroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:18
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/0071; C03C3/00; C03C3/12; C03C3/23; C03C3/247; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
88 words
Glasses suitable for laser applications having a low non-linear refractive index n 2 <0.60 in the optical position range nd=1.40-1.44 νd=94-86 which consist essentially of the following components, expressed as oxides in weight percent: P 2 O 5 : 4.5-9.10 As 2 O 5 : 0-4.5 P 2 O 5 +As 2 O 5 : 8.44-9.10 alkali metal oxides: 4.44-10.65 MgO: 3.88-4.23 CaO: 22.13-25.14 MgO+CaO: 26.11-29.02 SrO: 0-11.14 BaO: 0-9.62 SrO+BaO: 5.08-11.14 Al 2 O 3 : 18.70-20.03 Nd 2 O 3 : 0-2.58 F 2 -O: 27.61-28.90.
Claim 2
Dependent Claim
88 words
Glasses suitable for laser applications having a low non-linear refractive index n 2 <0.60 in the optical position range nd=1.40-1.44 νd=94-86 which consist essentially of the following components, expressed as oxides in weight percent: P 2 O 5 : 4.5-9.10 As 2 O 5 : 0-4.5 P 2 O 5 +As 2 O 5 : 8.44-9.10 alkali metal oxides: 4.44-10.65 MgO: 3.88-4.23 CaO: 22.13-25.14 MgO+CaO: 26.11-29.02 SrO: 0-11.14 BaO: 0-9.62 SrO+BaO: 5.08-11.14 Al 2 O 3 : 18.70-20.03 Nd 2 O 3 : 0-2.58 F 2 -O: 27.61-28.90.
Claim 3
Dependent Claim
73 words
A glass composition according to claim 1, having a non-linear refractive index n 2 ˜0.513 in the optical position range nd˜1.430 and νd˜90.8, which comprises the following components, expressed as oxides in approximate weight percent: P 2 O 5 : 8.98 Na 2 O: 4.06 K 2 O: 2.92 MgO: 4.23 CaO: 22.71 MgO+CaO: 26.94 SrO: 7.63 Al 2 O 3 : 19.34 Nd 2 O 3 : 2.52 F 2 -O: 27.61.
Claim 4
Dependent Claim
88 words
Glasses suitable for laser applications having a low non-linear refractive index n 2 =0.55-0.65 in the optical position range nd=1.44-1.465 νd=90-85 which consist essentially of the following components, expressed as oxides in weight percent: P 2 O 5 : 7.95-11.30 As 2 O 5 : 0-2.25 P 2 O 5 +As 2 O 5 : 9.70-11.30 alkali metal oxides: 1.92-6.38 MgO: 3.82-4.21 CaO: 14.29-19.83 SrO: 9.12-17.90 BaO: 3.16-10.98 Al 2 O 3 : 15.24-17.07 Nd 2 O 3 : 1.10-2.35 MgO+CaO: 18.50-23.65 SrO+BaO: 16.08-28.57 F 2 -O: 23.54-25.79.
Claim 5
Dependent Claim
88 words
Glasses suitable for laser applications having a low non-linear refractive index n 2 =0.55-0.65 in the optical position range nd=1.44-1.465 νd=90-85 which consist essentially of the following components, expressed as oxides in weight percent: P 2 O 5 : 7.95-11.30 As 2 O 5 : 0-2.25 P 2 O 5 +As 2 O 5 : 9.70-11.30 alkali metal oxides: 1.92-6.38 MgO: 3.82-4.21 CaO: 14.29-19.83 SrO: 9.12-17.90 BaO: 3.16-10.98 Al 2 O 3 : 15.24-17.07 Nd 2 O 3 : 1.10-2.35 MgO+CaO: 18.50-23.65 SrO+BaO: 16.08-28.57 F 2 -O: 23.54-25.79.
Claim 6
Dependent Claim
85 words
A glass composition according to claim 3, having a non-linear refractive index n 2 ˜0.581 in the optical position range nd˜1.4526 and νd˜88.0, which comprises the following components, expressed as oxides in approximate weight percent: P 2 O 5 : 7.95 As 2 O 5 : 2.25 Na 2 O: 2.03 K 2 O: 0.20 MgO: 3.82 CaO: 19.83 SrO: 9.12 BaO: 10.98 Al 2 O 3 : 17.07 La 2 O 3 : 0.37 Nd 2 O 3 : 1.10 F 2 -O: 25.28.
Claim 7
Dependent Claim
88 words
Glasses suitable for laser applications having a low non-linear refractive index n 2 =0.60-0.70 in the optical position range nd=1.46-1.475 νd=88-83 which consist essentially of the following components, expressed as oxides in weight percent: P 2 O 5 : 6.85-11.40 As 2 O 5 : 0-4.41 P 2 O 5 +As 2 O 5 : 11.09-11.40 alkali metal oxides: 0-1.64 MgO: 3.62-4.27 CaO: 9.53-14.55 SrO: 17.73-21.53 BaO: 10.70-15.90 Al 2 O 3 : 13.72-15.33 Nd 2 O 3 : 0-2.18 MgO+CaO: 13.65-18.66 SrO+BaO: 28.71-37.43 F 2 -O: 21.25-23.42.
Claim 8
Dependent Claim
88 words
Glasses suitable for laser applications having a low non-linear refractive index n 2 =0.60-0.70 in the optical position range nd=1.46-1.475 νd=88-83 which consist essentially of the following components, expressed as oxides in weight percent: P 2 O 5 : 6.85-11.40 As 2 O 5 : 0-4.41 P 2 O 5 +As 2 O 5 : 11.09-11.40 alkali metal oxides: 0-1.64 MgO: 3.62-4.27 CaO: 9.53-14.55 SrO: 17.73-21.53 BaO: 10.70-15.90 Al 2 O 3 : 13.72-15.33 Nd 2 O 3 : 0-2.18 MgO+CaO: 13.65-18.66 SrO+BaO: 28.71-37.43 F 2 -O: 21.25-23.42.
Claim 9
Dependent Claim
75 words
A glass composition according to claim 5, having a non-linear refractive index n 2 ˜0.625 in the optical position range nd˜1.4683 and νd˜86.8, which comprises the following components, expressed as oxides in approximate weight percent: P 2 O 5 : 10.66 As 2 O 5 : 0.60 Na 2 O: 0.49 MgO: 4.27 CaO: 14.39 SrO: 18.01 BaO: 10.70 Al 2 O 3 : 15.30 Nd 2 O 3 : 2.16 F 2 -O: 23.42.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |