DE406844C - Adjustment device for photographic lenses - Google Patents
Adjustment device for photographic lensesInfo
- Publication number
- DE406844C DE406844C DEE30240D DEE0030240D DE406844C DE 406844 C DE406844 C DE 406844C DE E30240 D DEE30240 D DE E30240D DE E0030240 D DEE0030240 D DE E0030240D DE 406844 C DE406844 C DE 406844C
- Authority
- DE
- Germany
- Prior art keywords
- ring
- adjustment device
- photographic lenses
- adjustment
- fine
- 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
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lens Barrels (AREA)
Description
Die Erfindung betrifft eine Einstellvorrichtung für Objektive, die in einem an der Vorderwand der Kamera befestigten Fassungsteil verschiebbar sind und bezweckt eine weitere Ausbildung der Erfindung nach Patent 396427.The invention relates to an adjustment device for lenses in one of the Front wall of the camera attached frame part are displaceable and aims a further development of the invention according to patent 396427.
Durch, das Hauptpatent ist eine Feineinstellvorrichtung geschützt, bei welcher eine Stihneckenspindel angebracht ist, deren Schnecke in ein Schneckenrad an dem feststehenden Fassungsteil eingreift. Bei dieser Ausbildung ragt ,die Sdhneckenspindel über die Fassung des Objektivs hinaus. Um derartige vorspringende Teile zu vermeiden, ist nach der Erfindung auf einem die Grobeinstellung bewirkenden Ringe em mit Feingewinde versehener Ring angebracht, welcher in das Feingewinde des feststehenden Ringes eingreift.By, the main patent is a fine adjustment device protected, in which a male corner spindle is attached, whose Worm engages in a worm wheel on the fixed socket part. At this Training protrudes, the ceiling spindle above the mount of the lens. To avoid such protruding parts, is according to the invention on a coarse adjustment effecting rings em with fine thread provided ring attached, which engages in the fine thread of the fixed ring.
In der Abbildung wird ein Ausführungsbeispiel gezeigt. An exemplary embodiment is shown in the figure.
Ein die Linsen tragender, mit Schneckengewinde versehener Fassungsteil 1 ist in dem feststehenden Ring 2 durch Drehen eines Grobeinstellringes 5, der ebenfalls mit Schnekkengahggewinde versehen ist, achsial verschiebbar angebracht. Der Einstellring 5 wird von einem Feineinstellring 3 drehbar umfaßt, ist jedoch auf ihm achsial unverschiebbar angebracht. Gelagert ist dieser Feineinstellring durch ein feines Gewinde 4 in dem feststehenden Ring 2.A screw-threaded mount part 1 carrying the lenses is in the fixed ring 2 by turning a coarse adjustment ring 5, which is also with a worm gear thread is provided, attached axially displaceable. The adjustment ring 5 is rotatably encompassed by a fine adjustment ring 3, however, it is attached to it in such a way that it cannot be axially displaced. This fine adjustment ring is mounted through a fine thread 4 in the stationary ring 2.
Die Wirkungsweise der Einstellvorrichtung ist folgende:The mode of operation of the adjustment device is as follows:
Wird der Grobeinstellring 5 gedreht, so wird der Fassungsteil 1 entsprechend der Gewindesteigung des Schneckenganges achsial verschoben. Um nunmehr eine geringe Verschiebung des Fassungsteiles 1 zu erreichen M zwecks genauer Einstellung bei lichtstarken 4™ Objektiven (z.B. f:2), bei welchen die geringste Verschiebung schon eine Unscharfe hervorruft, wird der Feineinstellring 3 gedreht, wobei sich der Fassungsteil 1 samt dem Grobeinstellring S gemäß der Steigung des Gewindes 4 achsial verschiebt. Die Drehung des Grob- sowie Feineinstellringes ist durch Anschläge' begrenzt.If the coarse adjusting ring 5 is rotated, the mounting part 1 is axially displaced according to the thread pitch of the worm gear. In order to now achieve a slight displacement of the mount part 1 M for the purpose of more precise adjustment in the case of bright 4 ™ lenses (e.g. f: 2), in which the slightest shift already causes a blurring, the fine adjustment ring 3 is rotated, with the mount part 1 together with the coarse adjustment ring S shifts axially according to the pitch of the thread 4. The rotation of the coarse and fine adjustment ring is limited by stops.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEE30240D DE406844C (en) | Adjustment device for photographic lenses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEE30240D DE406844C (en) | Adjustment device for photographic lenses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE406844C true DE406844C (en) | 1924-12-04 |
Family
ID=7074380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEE30240D Expired DE406844C (en) | Adjustment device for photographic lenses |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE406844C (en) |
-
0
- DE DEE30240D patent/DE406844C/en not_active Expired
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