DE331944C - Photographic lens with attached collecting magnification system - Google Patents
Photographic lens with attached collecting magnification systemInfo
- Publication number
- DE331944C DE331944C DENDAT331944D DE331944DD DE331944C DE 331944 C DE331944 C DE 331944C DE NDAT331944 D DENDAT331944 D DE NDAT331944D DE 331944D D DE331944D D DE 331944DD DE 331944 C DE331944 C DE 331944C
- Authority
- DE
- Germany
- Prior art keywords
- lens
- photographic lens
- magnification system
- photographic
- attached
- 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
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
- G02B15/1451—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being positive
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Description
Photographisches Objektiv mit angesetztem sammelnden Vergrößerungssystem. Die Erfindung bezieht sich auf ein optisches System, bestehend aus einem auswechselbaren sammelnden Linsensystem, das hinter einem gewöhnlichen photographischen Objektiv befestigt wird, um das von ihm entworfene Bild aufzufangen und in beliebigem Maßstabe wieder aufzurichten. Hierbei muß die Entfernung des Ansatzsystems vom photographischen Objektiv größer sein als die Summe der einander zugekehrten Vereinigungsweiten von Objektiv und Ansatzsystem. Da aber selbst die an Handkameras gebräuchlichen photographischen Objektive beträchtliche Vereinigungsweiten besitzen, so benötigen derartige Linsenzusammenstellungen eine sehr große Tübuslänge, welche die Brauchbarkeit der ganzen Anordnung in Frage stellt.Photographic lens with attached collecting magnification system. The invention relates to an optical system consisting of an exchangeable one collecting lens system that is behind an ordinary photographic lens attached to capture the image he designed and in any scale to straighten up again. The removal of the attachment system from the photographic Objectively greater than the sum of the mutually facing union widths of Lens and neck system. But there are even the photographic ones commonly used on handheld cameras Lenses have considerable union widths, so require such lens assemblies a very long tube length, which calls into question the usefulness of the whole arrangement represents.
Nach der Erfindung wird dieser Übelstand dadurch beseitigt, daß vor oder hinter dem photographischen Objektiv eine Sammellinse eingeschaltet wird, welche die Brennweite und damit auch die Vereinigungsweite des photographischen Objektivs verkürzt. Zur Vermeidung oder Kompensation von Linsenfehlern kann diese Sammellinse auch durch ein sammelndes Linsensystem ersetzt werden.According to the invention, this drawback is eliminated that before or a converging lens is switched on behind the photographic lens, which the focal length and thus also the union distance of the photographic lens shortened. This converging lens can be used to avoid or compensate for lens errors can also be replaced by a collecting lens system.
Zur Erzielung eines großen Bildfeldes kann in oder in der Nähe des Zwischenbildes ein sammelndes Linsensystem mit entsprechend großem Durchmesser und zweckmäßig bemessener Brennweite angeordnet werden.In or near the Intermediate image a collecting lens system with a correspondingly large diameter and appropriately sized focal length can be arranged.
Zwei derartige Ausführungsbeispiele sind in den Zeichnungen wiedergegeben. Die Sammellinse a, welche die Brennweite des photographischen Objektivs b verkürzt, befindet sich einmal vor (Fig. i) und einmal hinter demselben (Fig.2); c ist das bildaufrichtende Ansatzsystem, während die beiden eingeschalteten Sammellinsen d und e den Strahlenverlauf derart regeln, daß ein großes Bildfeld bei kleinem Durchmesser des Ansatzsystems c erzielt wird.Two such exemplary embodiments are shown in the drawings. The converging lens a, which shortens the focal length of the photographic lens b, is located once in front of it (FIG. I) and once behind it (FIG. 2); c is the image erecting attachment system, while the two activated converging lenses d and e regulate the beam path in such a way that a large image field is achieved with a small diameter of attachment system c.
Will man die Gesamtbrennweite der ganzen Linsenkombination vergrößern oder verkleinern, so verändert man den Abstand zwischen den beiden Sammellinsen d und e.. Zweckmäßigerweise wird man im Hinblick auf die Fig. 2 die Linsen a, d und e mit dem Ansatzsystem c derart vereinigen, daß sie mit diesem zusammen an der Fassung des Objektivs b auswechselbar sind. ,If one wishes to increase or decrease the total focal length of the whole lens combination, so varying the distance between the two converging lenses d and e .. Appropriately, is with regard to FIG. 2, the lenses a, d and e with the approach system c such unite that they are interchangeable with this together on the mount of the lens b. ,
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE331944T |
Publications (1)
Publication Number | Publication Date |
---|---|
DE331944C true DE331944C (en) | 1921-01-19 |
Family
ID=6200144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT331944D Expired DE331944C (en) | Photographic lens with attached collecting magnification system |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE331944C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2959099A (en) * | 1955-04-15 | 1960-11-08 | Philips Corp | Optical reproducing system |
DE1106515B (en) * | 1959-01-17 | 1961-05-10 | Rodenstock Optik G | Separable varifocal lens |
DE1231458B (en) * | 1957-04-15 | 1966-12-29 | Jan Louis Wulff Jacobsen | Anamorphic lens |
-
0
- DE DENDAT331944D patent/DE331944C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2959099A (en) * | 1955-04-15 | 1960-11-08 | Philips Corp | Optical reproducing system |
DE1231458B (en) * | 1957-04-15 | 1966-12-29 | Jan Louis Wulff Jacobsen | Anamorphic lens |
DE1106515B (en) * | 1959-01-17 | 1961-05-10 | Rodenstock Optik G | Separable varifocal lens |
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