WO1987002351A1 - Optical phosphate glass with anomalous positive particle scattering and process for it manufacture - Google Patents
Optical phosphate glass with anomalous positive particle scattering and process for it manufacture Download PDFInfo
- Publication number
- WO1987002351A1 WO1987002351A1 PCT/DE1986/000416 DE8600416W WO8702351A1 WO 1987002351 A1 WO1987002351 A1 WO 1987002351A1 DE 8600416 W DE8600416 W DE 8600416W WO 8702351 A1 WO8702351 A1 WO 8702351A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- content
- following
- optical
- oxides
- glass according
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000002547 anomalous effect Effects 0.000 title claims abstract description 7
- 239000005365 phosphate glass Substances 0.000 title claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000002245 particle Substances 0.000 title abstract 2
- 239000011521 glass Substances 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 150000002222 fluorine compounds Chemical class 0.000 claims abstract description 4
- 125000005341 metaphosphate group Chemical group 0.000 claims abstract 2
- 229910052758 niobium Inorganic materials 0.000 claims abstract 2
- 229910052726 zirconium Inorganic materials 0.000 claims abstract 2
- 239000006185 dispersion Substances 0.000 claims description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 229910016569 AlF 3 Inorganic materials 0.000 claims 2
- 229910016036 BaF 2 Inorganic materials 0.000 claims 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 238000007670 refining Methods 0.000 claims 1
- 229910052715 tantalum Inorganic materials 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 230000000704 physical effect Effects 0.000 abstract 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 4
- 229910001634 calcium fluoride Inorganic materials 0.000 description 4
- 239000005304 optical glass Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- DHAHRLDIUIPTCJ-UHFFFAOYSA-K aluminium metaphosphate Chemical compound [Al+3].[O-]P(=O)=O.[O-]P(=O)=O.[O-]P(=O)=O DHAHRLDIUIPTCJ-UHFFFAOYSA-K 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 1
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 229910001632 barium fluoride Inorganic materials 0.000 description 1
- JZKFIPKXQBZXMW-UHFFFAOYSA-L beryllium difluoride Chemical compound F[Be]F JZKFIPKXQBZXMW-UHFFFAOYSA-L 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- ROPDWRCJTIRLTR-UHFFFAOYSA-L calcium metaphosphate Chemical compound [Ca+2].[O-]P(=O)=O.[O-]P(=O)=O ROPDWRCJTIRLTR-UHFFFAOYSA-L 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- DWYMPOCYEZONEA-UHFFFAOYSA-L fluoridophosphate Chemical compound [O-]P([O-])(F)=O DWYMPOCYEZONEA-UHFFFAOYSA-L 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000005303 fluorophosphate glass Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000012803 melt mixture Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- UZLYXNNZYFBAQO-UHFFFAOYSA-N oxygen(2-);ytterbium(3+) Chemical compound [O-2].[O-2].[O-2].[Yb+3].[Yb+3] UZLYXNNZYFBAQO-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229940075624 ytterbium oxide Drugs 0.000 description 1
- 229910003454 ytterbium oxide Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/12—Silica-free oxide glass compositions
- C03C3/23—Silica-free oxide glass compositions containing halogen and at least one oxide, e.g. oxide of boron
- C03C3/247—Silica-free oxide glass compositions containing halogen and at least one oxide, e.g. oxide of boron containing fluorine and phosphorus
Definitions
- the application relates to an optical phosphate glass with anomalous positive partial dispersion, which is free of alkalis and calcium, and a method for its production.
- the highly toxic beryllium fluoride (BeF 2 ) was initially used as the glass former in these systems.
- phosphates of I to III are preferably used.
- Group of the periodic table of chemical elements as glass formers.
- the fluoride components are more than 50% by weight of the raw materials used. Because of this high fluoride content, it is difficult to melt larger units of these glasses without streaks.
- Glasses are known from DE-OS 32 01 370 which, in addition to larger amounts of aluminum metaphosphate (13-39% by weight), also contain calcium metaphosphate (1-20% by weight) as glass formers. In addition, they have a fluoride content between 19 and 47% by weight. In addition to barium oxide, yttrium oxide and / or ytterbium oxide is also present in amounts of 1.5 to 12% by weight. Remelting of the examples given in DE-OS 32 01 370 showed that even with the smallest melting batches of approx. 50 g, turbidity could not be avoided when slowly stirring, and the melts in some examples even crystallized out.
- Dispersion is relatively small and its abnormal positive partial dispersion is relatively large.
- the task also consists in specifying a method for smear-free melting of the glass in large units. This object is achieved according to the invention by the features of patent claim 1 and of patent claim 4. Further refinements result from the subclaims.
- the alkaline earth metal metaphosphates Mg (PO 3 ) 2 and Ba (PO 3 ) 2 and aluminum metaphosphate (Al (PO 3 ) 3 ) are added to the starting material in a total amount of between 40.6 and 49.6% by weight as glass formers.
- the alkaline earth fluorides of magnesium, strontium and barium as well as aluminum fluoride (AIF 3 ) are added as fluoride components in a total amount between 7.0 and 8.1% by weight into the starting material mixture.
- the oxides of strontium, barium and aluminum are used as essential oxide components.
- the following oxides can optionally be used individually or together: B 2 O 3 , Y 2 O 3 , Gd 2 O 3 , ZrO 2 , Ta 2 O 5 , Nb 2 O 5 .
- Tables 3 and 4 below show the starting compositions of the glasses according to the invention contained in Tables 1 and 2.
- Table 3 contains those examples which, in addition to the essential components, also have the optional components Y 2 O 3 , Gd 2 O 3 and Nb 2 O 5, individually or in combination, while Table 4 lists those examples which are shown as optional components Gd 2 O 3 , B 2 O 3 , ZrO 2 , Nb 2 O 5 and Ta 2 O 5 included individually or in combination.
- the batch is appropriately melted in a platinum crucible.
- the procedure for performing a melt weighing 6 kg is described below.
- the melt mixture consists of a material mixture as it is listed in Table 3 under melting example No. 1.
- the well-mixed mixture is placed in portions in a platinum crucible, the temperature of which is 1100 to 1150 ° C.
- the insertion time is approx. 1 hour.
- the mixture is then brought back to about 1150 ° C. and refined for about 45 minutes while stirring at intervals. If the melt is free of bubbles, the stirring speed is reduced to approx. 80 rpm and then reduced to a casting temperature of approx. 900 ° C.
- the melt is finally poured into steel molds preheated to approx. 550 ° C and cooled in an annealing furnace.
- n e refractive index
- ⁇ the measuring wavelength used [nm]
- ⁇ i (5 mm) the pure transmittance of a 5 nm thick glass plate
- ⁇ i (25 mm) the pure transmittance of a 25 nm star
- the glass is low in fluorescence and can be processed into compacts with large diameters. It is used especially for highly corrected photo lenses.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT86906264T ATE60314T1 (de) | 1985-10-19 | 1986-10-17 | Optisches phosphatglas mit anomaler positiver teildispersion und verfahren zu seiner herstellung. |
| DE8686906264T DE3677207D1 (de) | 1985-10-19 | 1986-10-17 | Optisches phosphatglas mit anomaler positiver teildispersion und verfahren zu seiner herstellung. |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3537291 | 1985-10-19 | ||
| DEP3537291.5 | 1985-10-19 | ||
| DEP3634675.6 | 1986-10-11 | ||
| DE19863634675 DE3634675A1 (de) | 1985-10-19 | 1986-10-11 | Optisches phosphatglas mit anomaler positiver teildispersion und verfahren zu seiner herstellung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1987002351A1 true WO1987002351A1 (en) | 1987-04-23 |
Family
ID=25837119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1986/000416 WO1987002351A1 (en) | 1985-10-19 | 1986-10-17 | Optical phosphate glass with anomalous positive particle scattering and process for it manufacture |
Country Status (3)
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0364150A1 (en) * | 1988-10-06 | 1990-04-18 | Sumita Optical Glass, Inc. | A fluorophosphate optical glass |
| EP1516862A1 (en) * | 2003-09-16 | 2005-03-23 | Kabushiki Kaisha Ohara | Optical glass having a small photoelastic constant |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804622B (zh) * | 2021-01-21 | 2023-08-01 | 成都光明光电股份有限公司 | 近红外特殊色散玻璃 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB909679A (en) * | 1958-06-13 | 1962-10-31 | Zeiss Stiftung | Fluoride-containing phosphate glass |
| FR1557218A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1967-02-23 | 1969-02-14 | ||
| FR2241505A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1973-08-23 | 1975-03-21 | Leitz Ernst Gmbh | |
| DE3201370A1 (de) * | 1981-01-20 | 1982-12-09 | Nippon Kogaku K.K., Tokyo | Optisches fluorphosphatglas |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE471354A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1946-01-29 |
-
1986
- 1986-10-11 DE DE19863634675 patent/DE3634675A1/de active Granted
- 1986-10-17 EP EP86906264A patent/EP0244448B1/de not_active Expired - Lifetime
- 1986-10-17 WO PCT/DE1986/000416 patent/WO1987002351A1/de active IP Right Grant
- 1986-10-17 DE DE8686906264T patent/DE3677207D1/de not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB909679A (en) * | 1958-06-13 | 1962-10-31 | Zeiss Stiftung | Fluoride-containing phosphate glass |
| FR1557218A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1967-02-23 | 1969-02-14 | ||
| FR2241505A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1973-08-23 | 1975-03-21 | Leitz Ernst Gmbh | |
| DE3201370A1 (de) * | 1981-01-20 | 1982-12-09 | Nippon Kogaku K.K., Tokyo | Optisches fluorphosphatglas |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0364150A1 (en) * | 1988-10-06 | 1990-04-18 | Sumita Optical Glass, Inc. | A fluorophosphate optical glass |
| EP1516862A1 (en) * | 2003-09-16 | 2005-03-23 | Kabushiki Kaisha Ohara | Optical glass having a small photoelastic constant |
| US7088903B2 (en) | 2003-09-16 | 2006-08-08 | Kabushiki Kaisha Ohara | Optical glass having a small photoelastic constant |
| CN1303024C (zh) * | 2003-09-16 | 2007-03-07 | 株式会社小原 | 光弹性常数小的光学玻璃 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3634675C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1988-09-22 |
| DE3677207D1 (de) | 1991-02-28 |
| EP0244448B1 (de) | 1991-01-23 |
| DE3634675A1 (de) | 1987-04-23 |
| EP0244448A1 (de) | 1987-11-11 |
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