DE118433C - Spherically chromatically and astigmatically corrected lens - Google Patents
Spherically chromatically and astigmatically corrected lensInfo
- Publication number
- DE118433C DE118433C DE1899118433D DE118433DA DE118433C DE 118433 C DE118433 C DE 118433C DE 1899118433 D DE1899118433 D DE 1899118433D DE 118433D A DE118433D A DE 118433DA DE 118433 C DE118433 C DE 118433C
- Authority
- DE
- Germany
- Prior art keywords
- lens
- chromatically
- spherically
- corrected lens
- astigmatically
- 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
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/04—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having two components only
Description
:ί : ί
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
ATENTSCHRIFTIDENTIFICATION
- JVr 118433
KLASSE 42 h. - JVr 118433
CLASS 42 h.
Patentirt im Deutschen Reiche vom 16. Juli 1899 ab.Patented in the German Empire on July 16, 1899.
Bei dem vorliegenden, in der beiliegenden Zeichnung als Doppelobjektiv dargestellten Objektiv wird die sphärische und astigmatische Korrektion in zwei getrennten Gliedern vorgenommen. Diese Glieder sind durch eine Luftschicht von einander getrennt. Das äufsere Glied bildet eine Biconvexlinse A, während das innere aus einer Planconcavlinse B und einem positiven Meniscus C besteht.In the present objective, shown in the accompanying drawing as a double objective, the spherical and astigmatic correction is carried out in two separate parts. These links are separated from each other by a layer of air. The outer member forms a biconvex lens A, while the inner one consists of a planoconcave lens B and a positive meniscus C.
Die Biconvexlinse A ist aus stark brechendem Kronglas hergestellt und dient zur Erreichung der astigmatischen Korrektion.The biconvex lens A is made of highly refractive crown glass and is used to achieve astigmatic correction.
Die sphärische Korrektion geschieht wie bei den Aplanaten an der inneren Fläche der verkitteten Doppellinse, deren eine Linse B eine negative Flintglaslinse, deren andere ein positiver Meniscus C von schwächer brechendem Kronglas ist, wobei aber die Gesammtbrennweite der Doppellinse negativ ist.As with the aplanates, the spherical correction takes place on the inner surface of the cemented double lens, one of which is a lens B a negative flint glass lens, the other a positive meniscus C of weaker refractive crown glass, but the total focal length of the double lens is negative.
Das Objektiv besitzt demnach ein Korrektionsglied für die sphärische und eines für die astigmatische Korrektion. Der Umstand, dafs die Doppellinse, welche im Innern den verkitteten sphärisch wirkenden Bogen trägt, beiderseitig von Luft eingeschlossen ist, hat zur Folge, dafs dieser Bogen einer nur verhältnifsmäfsig geringen Krümmung bedarf, so dafs die wirksame Oeffnung des Objektivs Y5 der Brennweite zu erreichen vermag.The objective accordingly has a correction element for the spherical and one for the astigmatic correction. The fact that the double lens, which carries the cemented spherical arc inside, is enclosed by air on both sides, has the consequence that this arc only needs a relatively small curvature, so that the effective opening of the objective Y 5 can reach the focal length able.
Als Ausführungsbeispiel eines solchen Doppelobjektivs sei das folgende mit einer Brennweite von 220 mm und einer Oeffnung von Vs F gegeben:As an exemplary embodiment of such a double lens, the following is given with a focal length of 220 mm and an aperture of Vs F :
r1 =r 1 =
r10 =r 10 =
== r8 === r 8 =
— 85o,o „
Al = Δ3 = -f- 5! 5 ° mm
- 8 5o, o "
Al = Δ 3 =
0,2 mm d, = d e
0.2 mm
+ 58,0 „
Δ2 =-) - 24.00 mm
+ 58.0 "
Δ 2 =
3 ~ 4
mm d i = d h
3 ~ 4
mm
= 5)5 ,j= 2.5 mm
= 5) 5, j
npnp
= 1,6187= 1.6112
= 1.6187
TipTip
= 1,5798= 1.5718 l
= 1.5798
= 1,5123·= I, 5063
= 1.5123
Claims (1)
Sphärisch, chromatisch und astigmatisch korrigirtes Objektiv mit zwei durch ein schwach brechendes Medium getrennten Theilen, bestehend aus einer biconvexen Kronglaslinse (A) von hoher Brechung und einer von ihr durch eine Luftschicht getrennten verkitteten negativen Doppellinse, deren innere Linse (B) eine negative Flintglaslinse, deren äufsere ein positiver Kronglasmeniscus (C) mit niedrigerem Brechungsexponenten ist. Patent Claims:
Spherically, chromatically and astigmatically corrected lens with two parts separated by a weakly refractive medium, consisting of a biconvex crown glass lens (A) of high refraction and a cemented negative double lens separated from it by a layer of air, the inner lens (B) of which is a negative flint glass lens, whose outer one is a positive crown glass meniscus (C) with a lower refractive exponent.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE118433T | 1899-07-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE118433C true DE118433C (en) | 1901-03-05 |
Family
ID=387631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1899118433D Expired DE118433C (en) | 1899-07-16 | 1899-07-16 | Spherically chromatically and astigmatically corrected lens |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE118433C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4123144A (en) * | 1976-05-18 | 1978-10-31 | Ernst Leitz Wetzlar Gmbh | Four-member gauss objective |
| US6294289B1 (en) | 1998-08-25 | 2001-09-25 | 3M Innovative Properties Company | Cyano-substituted methide and amide salts |
-
1899
- 1899-07-16 DE DE1899118433D patent/DE118433C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4123144A (en) * | 1976-05-18 | 1978-10-31 | Ernst Leitz Wetzlar Gmbh | Four-member gauss objective |
| US6294289B1 (en) | 1998-08-25 | 2001-09-25 | 3M Innovative Properties Company | Cyano-substituted methide and amide salts |
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