DE291916C - - Google Patents
Info
- Publication number
- DE291916C DE291916C DENDAT291916D DE291916DA DE291916C DE 291916 C DE291916 C DE 291916C DE NDAT291916 D DENDAT291916 D DE NDAT291916D DE 291916D A DE291916D A DE 291916DA DE 291916 C DE291916 C DE 291916C
- Authority
- DE
- Germany
- Prior art keywords
- lens
- converging
- diaphragm
- cemented
- negative lens
- 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.)
- Active
Links
- 239000011521 glass Substances 0.000 description 2
- 206010073261 Ovarian theca cell tumour Diseases 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 208000001644 thecoma Diseases 0.000 description 1
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 -
- G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Description
DEUTSCHES REICHGERMAN EMPIRE
AUSGEGEBEN AM 22. JULI 1919ISSUED JULY 22, 1919
REICHSPATENTAMTREICH PATENT OFFICE
PATENTSCHRIFTPATENT LETTERING
- JVi 291916 KLASSE 42 h GRUPPE 4 ,- JVi 291916 CLASS 42 h GROUP 4,
VOIGTLÄNDER & SOHN, AKTIENGESELLSCHAFTVOIGTLÄNDER & SOHN, AKTIENGESELLSCHAFT
in BRAUNSCHWEIG.in BRAUNSCHWEIG.
Sphärisch, chromatisch und astigmatisch korrigiertes Objektiv. Patentiert im Deutschen Reiche vom 12. März 1914 ab. Spherically, chromatically and astigmatically corrected lens. Patented in the German Empire on March 12, 1914.
Die vorliegende Erfindung bezieht sich auf ein Objektiv, ,das eine Vereinfachung bzw. Verbesserung der Objektive darstellen soll, wie sie durch Patente 124934, 143889, 154910 und 154911 bekannt geworden sind. Diese Objektive bestehen sämtlich aus drei getrennten Linsengruppen und enthalten in der ersten und dritten Linsenkombination eine sammelnde Kittfläche, -die hohl oder erhaben gegen die Blende ist. Das neue Objektiv unterscheidet sich dadurch wesentlich von jenen, daß nur die erste Linse verkittet ist und eine sammelnde, gegen die Blende erhabene Kittfläche mit einer Exponentendiffefenz von mindestens 0,05 Einheiten für die D-Linie enthält. Um einen möglichst kurzen Bau zu ermöglichen, ist der erste Luftabstand so gewählt, daß derselbe zwischen den Werten 1,5 und 4,0 bei einer System brennweite von f=ioo liegt.The present invention relates to an objective, which is intended to represent a simplification or improvement of the objectives as they have become known through patents 124934, 143889, 154910 and 154911. These objectives all consist of three separate lens groups and contain in the first and third lens combination a converging cement surface which is hollow or raised against the diaphragm. The new lens differs significantly from those in that only the first lens is cemented and contains a converging cemented surface raised towards the diaphragm with an exponent difference of at least 0.05 units for the D-line . In order to make the construction as short as possible, the first air gap is chosen so that it is between the values 1.5 and 4.0 with a system focal length of f = 100.
Wie bei den bekannten Objektiven ist die sphärische Korrektur vorzüglich durchgeführt, und auch die Koma ist für die ganze Öffnung so gut wie vollkommen beseitigt. Die astigmatische Korrektur zeigt den bekannten Ob-" 25 jektiven gegenüber trotz der Verminderungen der Anzahl der Linsen mindestens keine Verschlechterung. Als weiterer Vorzug des Systems, darf hervorgehoben werden, daß dasselbe bei passender Wahl der Brechungsindizes entsprechend dem bekannten Cookeschen Triplet nur aus zwei Glassorten zu bestehen braucht, wie das unten angegebene Ausführungsbeispiel zeigt. Als Ausführungsbeispiel des neuen Objektivs, das durch nebenstehende Zeichnung erläutert wird, diene das Folgende von der Brennweite, /"=ioo:As with the known lenses, the spherical correction is carried out excellently, and the coma is as good as completely eliminated for the entire opening. The astigmatic one Correction shows the known lenses to be seen in spite of the reductions the number of lenses at least no deterioration. Another advantage of the system, it may be emphasized that the same can be said for a suitable choice of the refractive indices the well-known Cookean triplet only needs to consist of two types of glass, as the embodiment given below shows. As an embodiment of the new lens, which is explained by the adjacent drawing, serve the following of the Focal length, / "= ioo:
»Ί = + 23,86»Ί = + 23.86
iy iy
'2 '2
rs =r s =
Freie Öffnung 14,7 Relative Öffnung Ί : 6,8Free opening 14.7 Relative opening Ί: 6.8
Die Blende befindet sich im zweiten Lufträume dicht hinter der Negativlinse.The diaphragm is located in the second air space just behind the negative lens.
Glasarten: ,Glass types:,
no na' . ■ .no na '. ■.
L1 u. L41,61561 1,62963 schwerstes Barytkron L2U. L31,55011 1,56568 extra leichtes Flint. L 1 and L 4 1.61561 1.62963 heaviest barite crown L 2 U. L 3 1.55011 1.56568 extra light flint.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE291916C true DE291916C (en) |
Family
ID=546745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT291916D Active DE291916C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE291916C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2854889A (en) * | 1953-09-18 | 1958-10-07 | Agfa Ag | Three-membered photographic objective |
-
0
- DE DENDAT291916D patent/DE291916C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2854889A (en) * | 1953-09-18 | 1958-10-07 | Agfa Ag | Three-membered photographic objective |
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