DE919195C - Optical crown glass - Google Patents

Optical crown glass

Info

Publication number
DE919195C
DE919195C DEL13963A DEL0013963A DE919195C DE 919195 C DE919195 C DE 919195C DE L13963 A DEL13963 A DE L13963A DE L0013963 A DEL0013963 A DE L0013963A DE 919195 C DE919195 C DE 919195C
Authority
DE
Germany
Prior art keywords
percent
weight
oxide
crown glass
alkaline earth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEL13963A
Other languages
German (de)
Inventor
Norbert Meinert
Dr Otto Ungemach
Gustav Weissenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz Wetzlar GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ernst Leitz Wetzlar GmbH filed Critical Ernst Leitz Wetzlar GmbH
Priority to DEL13963A priority Critical patent/DE919195C/en
Application granted granted Critical
Publication of DE919195C publication Critical patent/DE919195C/en
Expired legal-status Critical Current

Links

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
    • C03C3/14—Silica-free oxide glass compositions containing boron
    • C03C3/142—Silica-free oxide glass compositions containing boron containing lead
    • 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
    • C03C3/14—Silica-free oxide glass compositions containing boron
    • 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
    • C03C3/14—Silica-free oxide glass compositions containing boron
    • C03C3/145—Silica-free oxide glass compositions containing boron containing aluminium or beryllium
    • 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
    • C03C3/14—Silica-free oxide glass compositions containing boron
    • C03C3/15—Silica-free oxide glass compositions containing boron containing rare earths
    • C03C3/155—Silica-free oxide glass compositions containing boron containing rare earths containing zirconium, titanium, tantalum or niobium

Description

Gegenstand der Erfindung sind optische KrongläserThe invention relates to optical crown glasses

mit anomaler Teildispersion ϋ· =with anomalous partial dispersion ϋ · =

— nc - n c

UnterUnder

Gläsern mit anomaler Teildispersion seien Gläser verstanden, die in dem bekannten »»-^-Diagramm fürGlasses with anomalous partial dispersion are to be understood as glasses which are shown in the well-known »» - ^ diagram for

ν =
nF—nc ν =
n F -n c

außerhalb der für dieoutside of for the

ίο bisher bekannten Gläser gültigen j<-#-Geraden liegen. Die Abweichung von der Geraden im j>-Wert wird als Δ ν bezeichnet, wobei Δ ν positiv oder negativ sein kann, je nach der Lage der Gläser rechts oder links von der Geraden. ίο previously known glasses are valid j <- # straight lines. The deviation from the straight line in the j> value is referred to as Δ ν , where Δ ν can be positive or negative, depending on the position of the glasses to the right or left of the straight line.

Gläser mit anomaler Teildispersion sind für den optischen Rechner besonders wertvoll, weil dadurch die Korrektur des sekundären Spektrums bei Linsensystemen möglich ist. Gegenstand dieser Erfindung sind Krongläser mit negativem /Iv-Wert.Glasses with anomalous partial dispersion are particularly valuable for the optical computer because they make them correction of the secondary spectrum is possible in lens systems. Subject of this invention are crown glasses with a negative / Iv value.

Es wurde gefunden, daß hochwertige optische Gläser mit den gewünschten negativen Δ ν-Werten durch Niederschmelzen eines Gemisches aus Borsäureanhydrid und Zirkonoxyd in Gegenwart eines Carbonates eines Alkalimetalls, vorzugsweise des Lithiums und/oder Natriums, oder aus Borsäureanhydrid, den Metaboraten eines Elementes der 2. Gruppe des Periodischen Systems, Zirkonoxyd und Lanthanoxyd, erhalten werden.It has been found that high-quality optical glasses with the desired negative Δ ν values can be produced by melting down a mixture of boric anhydride and zirconium oxide in the presence of a carbonate of an alkali metal, preferably lithium and / or sodium, or of boric anhydride, the metaborates of an element of the 2nd Group of the Periodic Table, Zirconia and Lanthanum Oxide.

In den nachfolgenden Tabellen werden eine Reihe derartiger Schmelzen gezeigt, die jedoch nicht den Umfang des erfindungsgemäßen Verfahrens beschränken sollen.A number of such melts are shown in the following tables, but not the Are intended to limit the scope of the method according to the invention.

Tabelle ι in GewichtsprozentTable ι in percent by weight

Schm. Nr.Schm. No. B2O3 B 2 O 3 Na2CO3 Na 2 CO 3 ZrO2 ZrO 2 «D«D VV 0,544
0,540
0,543
o,5450.544
0.540
0.543
o, 545 AvAv B 29 B 29 54.0
51.5
49.3
47.254.0
51.5
49.3
47.2 41,2
39.4
37.6
36,141.2
39.4
37.6
36.1 4,8
9.1
13.1
16,74.8
9.1
13.1
16.7 I.5297
I.54I7
I.5527
I.5655I.5297
I.54I7
I.5527
I.5655 57.8«
54.5 &
52,3 c
49,9 d 57.8 "
54.5 &
52.3 c
49.9 d — 1,2
-6,7
— 7.2
-8,5 - 1.2
-6.7
- 7.2
-8.5 W551/B30
W553/B31
B 32 W551 / B30
W553 / B31
B 32

Tabelle 2 in GewichtsprozentTable 2 in percent by weight

Schm. Nr.Schm. No. B2O3 B 2 O 3 Li2CO3 Li 2 CO 3 ZrO2 ZrO 2 »D“D VV && AvAv B 34.. B 34 .. 62,3
59.5
56,962.3
59.5
56.9 32,9
31,4
30,132.9
31.4
30.1 4.8
9.1
13,04.8
9.1
13.0 1,5728
1,5839
1,59741.5728
1.5839
1.5974 60,8 j
58,3 k
56,01 60.8 j
58.3 k
56.0 1 0,533
0,533
o,5330.533
0.533
o, 533 — 4.5
— 7,0
— 9,3- 4.5
- 7.0
- 9.3 B 35 B 35 B 36 B 36

Die in den vorstehenden beiden Tabellen genannten Gläser sind also im wesentlichen gekennzeichnet dadurch, daß Borsäureanhydrid zwischen 45 und 65 %,The glasses mentioned in the two tables above are essentially characterized by that boric anhydride between 45 and 65%,

Alkalicarbonat zwischen 25 und 45 °/0 und Zirkonoxyd zwischen 4 und 20 % zur Anwendung gebracht werden.Alkali metal carbonate are brought between 25 and 45 ° / 0 and zirconia 4-20% is applied.

Tabelle 3 in GewichtsprozentTable 3 in percent by weight

Schm. Nr.Schm. No. B2O3 B 2 O 3 Li2CO3 Li 2 CO 3 ZrO2 ZrO 2 1,5595
1,5630
i,5746
i,54491.5595
1.5630
i, 5746
i, 5449 VV ■&■ & AvAv B 38 B 38 71,8
6-8,5
65,6
75,o71.8
6-8.5
65.6
75, o 23,4
22,4
21,4
15,923.4
22.4
21.4
15.9 4,8
9,1
13,0
9.14.8
9.1
13.0
9.1 59,o e
58,o f
56,2 g
57>5 h 59, o e
58, o f
56.2 g
57> 5 h 0,527
0,531
o,533
0,5300.527
0.531
o, 533
0.530 -9.8
-8,4
— 9.1
— 9-5-9.8
-8.4
- 9.1
- 9-5 30 W556/B39
W 560/B 40
B 43 30 W556 / B39
W 560 / B 40
B 43

Die in dieser Tabelle genannten Gläser sind also im wesentlichen gekennzeichnet dadurch, daß der GehaltThe glasses mentioned in this table are therefore essentially characterized in that the content

an Borsäureanhydrid wesentlich erhöht liegt, während der Gehalt an Alkalicarbonat stark gesenkt ist.boric anhydride is significantly increased, while the alkali metal carbonate content is greatly reduced.

Tabelle 4
in GewichtsprozentTable 4
in percent by weight

Schm. Nr.Schm. No. B2O3 B 2 O 3 CaOCaO La2O3 La 2 O 3 ZrO2 ZrO 2 %>%> VV o,55i
o,55i
o,548o, 55i
o, 55i
o, 548 AvAv Ko 368
Ko 371
Ko 373 Ko 368
Ko 371
Ko 373 33.6
36,3
36,833.6
36.3
36.8 8,9
5,4
4.88.9
5.4
4.8 42,6
41.7
41,742.6
41.7
41.7 14,9
16,6
16,714.9
16.6
16.7 tovo -φ
OO OO tv
VO tO IO
tv tv tv
h" h" h"tovo -φ
OO OO tv
VO to IO
tv tv tv
h "h" h " 48,3 m
48,7«
48,6048.3 m
48.7 "
48.60 — 6,6
-6,2
— 8,0- 6.6
-6.2
- 8.0

inin

Tabelle 5
GewichtsprozentTable 5
Weight percent

Schm. Nr.Schm. No.

KoKo

Ko 393Ko 393

KoKo

KoKo

KoKo

B2O3 . . .B 2 O 3 . . .

CaOB2O; La2O3 ..CaOB 2 O ; La 2 O 3 ..

ZrO2 ...ZrO 2 ...

PbO ... Al2O3 ..PbO ... Al 2 O 3 ..

BaO ...BaO ...

Nb2O3 .Nb 2 O 3 .

Ta2O6 ..Ta 2 O 6 ..

ηΏ η Ώ

vv

AvAv

24,8 14,9 39-7 15,8 4,824.8 14.9 39-7 15.8 4.8

1,7739 46,21.7739 46.2

0,559 — 3,90.559-3.9

1,7860
47,21.7860
47.2

0,552
-7,10.552
-7.1

22,9 13,822.9 13.8

45,7 16,645.7 16.6

1,01.0

1,7857 47,21.7857 47.2

o,553 -6,5o, 553 -6.5

26,026.0

15.7 41,615.7 41.6

8,358.35

8,358.35

1,76691.7669

44,7 s44.7 s

o,555 -7,8o, 555 -7.8

25,0 15,0 40,0 10,0 25.0 15.0 40.0 10.0

— lao- lao

10,010.0

1,76141.7614

47.2 t 47.2 t

0,553 "5 -6,50.553 "5 -6.5

Der Borsäuregehalt der vorstehenden Gläser ist wesentlich geringer.The boric acid content of the above glasses is much lower.

Rechnet man die Borsäure des Erdalkaliborats mit, so sind diese Gläser gekennzeichnet durch einen Borsäuregehalt zwischen 25 und 40%, einen Gehalt an Erdalkalioxyden von 2,5 bis 10%, einen Gehalt an Lanthanoxyd von 35 bis 45 %, einen Gehalt an Zirkonoxyd wieder von 4 bis 20 %. Daneben können die Gläser einen Gehalt an Bleioxyd, Tantaloxyd und/oder Nioboxyd besitzen.If the boric acid of the alkaline earth borate is included, these glasses are characterized by a boric acid content between 25 and 40%, an alkaline earth oxide content of 2.5 to 10%, a content of Lanthanum oxide from 35 to 45%, a content of zirconium oxide again from 4 to 20%. Besides that, you can the glasses contain lead oxide, tantalum oxide and / or niobium oxide.

Selbstverständlich können diese Gläser darüber hinaus noch Anteile an Kieselsäure, Aluminiumoxyd u. dgl. besitzen, die für die Stabilisierung solcher Gläser bekannt sind.Of course, these glasses can also contain silica and aluminum oxide and the like, which are known for the stabilization of such glasses.

Die Gläser sind farblos, stabil und gegen chemische Einflüsse gut beständig.The glasses are colorless, stable and resistant to chemical influences.

Claims (5)

Patentansprüche:Patent claims: i. Optisches Kronglas mit anomaler Teil-i. Optical crown glass with anomalous partial dispersion & = dispersion & = -, dadurch gekennzeichnet,-, characterized, daß die Schmelze mindestens 25 Gewichtsprozent Borsäureanhydrid, 4 bis 20 Gewichtsprozent Zirkonoxyd und 15 bis 45 Gewichtsprozent Alkalicarbonat oder 35 bis 55 Gewichtsprozent Lanthanoxyd und Erdalkalioxyd enthält, wobei das Erdalkalioxyd 10 Gewichtsprozent nicht überschreiten soll und als Erdalkaliborat in die Schmelze eingebracht ist.that the melt is at least 25 percent by weight boric anhydride, 4 to 20 percent by weight Zirconium oxide and 15 to 45 percent by weight alkali carbonate or 35 to 55 percent by weight lanthanum oxide and alkaline earth oxide, the alkaline earth oxide not exceeding 10 percent by weight and is introduced into the melt as alkaline earth borate. 2. Optisches Kronglas nach Anspruch 1, dadurch gekennzeichnet, daß es aus 45 bis 75 Gewichtsprozent Borsäureanhydrid, 4 bis 20 Gewichtsprozent Zirkonoxyd und 15 bis 45 Gewichtsprozent Alkalicarbonat, vorzugsweise Lithium- und/oder Natriumcarbonat erschmolzen ist.2. Optical crown glass according to claim 1, characterized in that it consists of 45 to 75 percent by weight Boric anhydride, 4 to 20 percent by weight zirconia and 15 to 45 percent by weight Alkali carbonate, preferably lithium and / or sodium carbonate, is melted. 3. Optisches Kronglas nach Anspruch 1, dadurch gekennzeichnet, daß es aus 25 bis 40 Gewichtsprozent Borsäureanhydrid, 4 bis 20 Gewichtsprozent Zirkonoxyd, 35 bis 45 Gewichtsprozent Lanthanoxyd und 2,5 bis 10 Gewichtsprozent Erdalkalioxyd besteht.3. Optical crown glass according to claim 1, characterized in that it consists of 25 to 40 percent by weight Boric anhydride, 4 to 20 weight percent zirconia, 35 to 45 weight percent Lanthanum oxide and 2.5 to 10 percent by weight of alkaline earth oxide. 4. Optisches Kronglas nach Anspruch 3, dadurch gekennzeichnet, daß das Erdalkali als Metaborat in die Schmelze eingebracht ist.4. Optical crown glass according to claim 3, characterized in that the alkaline earth metal as a metaborate is introduced into the melt. 5. Optisches Kronglas nach Anspruch 4, dadurch gekennzeichnet, daß es bis höchstens 10 Gewichtsprozent ein Oxyd von Blei, Niob oder Tantal enthält.5. Optical crown glass according to claim 4, characterized in that it is up to a maximum of 10 percent by weight contains an oxide of lead, niobium or tantalum. 5. Optisches Kronglas nach mindestens einem der Ansprüche 1 bis $, gekennzeichnet durch einen Gehalt an sich bekannter stabilisierender Substanzen, wie Kieselsäure, Aluminiumoxyd od. dgl.5. Optical crown glass according to at least one of claims 1 to $, characterized by a content of known stabilizing substances such as silica, aluminum oxide or the like. Hierzu 1 Blatt Zeichnungen1 sheet of drawings ® 9554 10.54® 9554 10.54
DEL13963A 1952-11-22 1952-11-23 Optical crown glass Expired DE919195C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL13963A DE919195C (en) 1952-11-22 1952-11-23 Optical crown glass

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2866712X 1952-11-22
DEL13963A DE919195C (en) 1952-11-22 1952-11-23 Optical crown glass

Publications (1)

Publication Number Publication Date
DE919195C true DE919195C (en) 1954-10-14

Family

ID=25985030

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
DE (1) DE919195C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE962288C (en) * 1954-09-14 1957-04-18 Leitz Ernst Gmbh Optical glass
DE1022764B (en) * 1956-04-20 1958-01-16 Leitz Ernst Gmbh Optical glass
DE1106800B (en) * 1958-07-28 1961-05-18 English Electric Valve Co Ltd Charge storage disk of a television reception tube of the super orthicon type
FR2396331A1 (en) * 1977-07-01 1979-01-26 Leitz Ernst Gmbh

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE962288C (en) * 1954-09-14 1957-04-18 Leitz Ernst Gmbh Optical glass
DE1022764B (en) * 1956-04-20 1958-01-16 Leitz Ernst Gmbh Optical glass
DE1106800B (en) * 1958-07-28 1961-05-18 English Electric Valve Co Ltd Charge storage disk of a television reception tube of the super orthicon type
FR2396331A1 (en) * 1977-07-01 1979-01-26 Leitz Ernst Gmbh

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