DE445690C - Focusing magnifier, especially for photographic purposes - Google Patents
Focusing magnifier, especially for photographic purposesInfo
- Publication number
- DE445690C DE445690C DEV20448D DEV0020448D DE445690C DE 445690 C DE445690 C DE 445690C DE V20448 D DEV20448 D DE V20448D DE V0020448 D DEV0020448 D DE V0020448D DE 445690 C DE445690 C DE 445690C
- Authority
- DE
- Germany
- Prior art keywords
- image
- magnifying glass
- focusing
- photographic purposes
- magnifier
- 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
- 239000011521 glass Substances 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 2
- 239000005337 ground glass Substances 0.000 description 2
- 241000282461 Canis lupus Species 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/002—Magnifying glasses
- G02B25/008—Magnifying glasses comprising two or more lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Description
Einstell-Lupe, insbesondere für photographische zwecke. Es sind Einstell-Lupen mit einem sammelnden Linsensystem bekannt, welche den für die Beurteilung der Schärfe des Mattscheibenbildes an photographischen Kameras. jeweilig in Betracht kommenden Bildausschnitt zwar vergrößert, aber wie das Mattscheibenbild selbst höhen- und seitenvertauscht zeigen, wodurch die Einstellung erschwert wird. Dieser Übelstand kann durch eine zusammengesetzte Lupe beseitigt werden, welche aus mehreren sammelnden Gliedern besteht, deren eines - das Umkehrsystem - von dem betreffenden Bildausschnitt ein reelles aufrechtes Bild erzeugt, das mit einem Okular betrachtet werden kann. Für SpiegeIreflexkameras, wo bereits ein höhenrichtiges Bild erzeugt wird, ist die Benutzung einer bildaufrichtenden Lupe-nicht von Vorteil, so daß in diesem Falle die einfache Lupe die zweckmäßige ist.Focusing magnifier, especially for photographic purposes. They are adjustment loupes known with a converging lens system, which is used for assessing the sharpness of the focusing screen image on photographic cameras. respectively eligible The image section is enlarged, but like the screen image itself, both in height and in show reversed, which makes the setting more difficult. This evil can be eliminated by a compound magnifying glass, which consists of several collecting There are limbs, one of which - the inverse system - of the relevant image section creates a real upright image that can be viewed with an eyepiece. For mirror reflex cameras where an image with the correct height is already available generated the use of an image erecting magnifying glass is not an advantage, so that in in this case the simple magnifying glass is the most appropriate.
Wird. nun die zusammengesetzte Lupe so aufgebaut, daß das Umkehrsystem aus zwei oder mehreren Teilen besteht, so kann eine solche optische und mechanische Trennung vorgenommen - werden, däß der untere Teil der Lupe mit einem bestimmten Teil 'd'es Umkehrsystems eine einfache Lupe bildet, bei deren Benutzung in bekannter Weise ein virtuelles Bild des betreffenden Mattscheibenbildes entsteht, während beim Gebrauch der zusammengesetzten Lupe die bereits beschriebene bildaufrichtende Wirkung eintritt.Will. now the assembled magnifying glass is constructed so that the inversion system consists of two or more parts, such an optical and mechanical Separation made - that the lower part of the magnifying glass with a certain Part of the inversion system forms a simple magnifying glass, when used in a familiar Way, a virtual image of the screen image in question is created while when using the assembled magnifying glass, the image erecting one already described Effect occurs.
Die Erfindung ist in der Zeichnung in einem Ausführungsbeispiel dargestellt, und zwar bedeuten: Abb. r den ErfirLdungsgegenstand im Schnitt in zwei Teile zerlegt, von denen der untere allein eine Lupe bekannter Art darstellt, und Abb.2 dasselbe Gerät im Gebrauchszustande als bildumkehrende Lupe. ' Es bedeutet i die Mattscheibe, p den unteren Teil des Hauptrohres, in welchem der Gummistulp b mit Glasscheibe c in bekannter Weise befestigt ist. Außerdem ist in diesem Fassungsteil das eine Glied r des mehrteiligen Umkehrsystems gelagert. Die untere Hälfte allein ist eine Lupe gewöhnlicher Art, ergibt also nur ein in der üblichen Weise vergrößertes Mattscheibenbild. Der obere Fassungsteil g enthält den anderen Bestandteils des Umkehrsystems ' und das Okular t. Der mit dem unteren Teil p verschraubte obere Teil g ergibt beim Gebrauch ein umgekehrtes Mattscheibenbild .(Abb.2).The invention is shown in the drawing in an exemplary embodiment, namely: Fig. R the subject of the invention disassembled in section into two parts, of which the lower alone represents a magnifying glass of a known type, and Fig.2 the same device in the state of use as an image-inverting magnifier. 'It means i the ground glass, p the lower part of the main pipe, in which the rubber face plate b with glass plate c is fixed in a known manner. In addition, one link r of the multi-part reversal system is mounted in this mount part. The lower half alone is a magnifying glass of the usual type, so it only gives a focusing screen image enlarged in the usual way. The upper mount part g contains the other component of the erecting system and the eyepiece t. The upper part g screwed to the lower part p results in an inverted ground glass image when in use (Fig. 2).
Die mechanischen Teile der Einstell-Lupe können aus Leichtmetall hergestellt werden, um das Gewicht des Instrumentes möglichst niedrig zu halten.,The mechanical parts of the focusing magnifier can be made of light metal to keep the weight of the instrument as low as possible.,
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV20448D DE445690C (en) | 1925-07-26 | 1925-07-26 | Focusing magnifier, especially for photographic purposes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV20448D DE445690C (en) | 1925-07-26 | 1925-07-26 | Focusing magnifier, especially for photographic purposes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE445690C true DE445690C (en) | 1927-06-13 |
Family
ID=7578541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEV20448D Expired DE445690C (en) | 1925-07-26 | 1925-07-26 | Focusing magnifier, especially for photographic purposes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE445690C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2622982A1 (en) * | 1987-11-09 | 1989-05-12 | Moracchini Alexandre | PORTABLE MONOCULAR |
-
1925
- 1925-07-26 DE DEV20448D patent/DE445690C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2622982A1 (en) * | 1987-11-09 | 1989-05-12 | Moracchini Alexandre | PORTABLE MONOCULAR |
WO1989004503A1 (en) * | 1987-11-09 | 1989-05-18 | Alexandre Moracchini | Portable monocular with high magnification |
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