GB918233A - Improvements in and relating to range-view-finders - Google Patents
Improvements in and relating to range-view-findersInfo
- Publication number
- GB918233A GB918233A GB361659A GB361659A GB918233A GB 918233 A GB918233 A GB 918233A GB 361659 A GB361659 A GB 361659A GB 361659 A GB361659 A GB 361659A GB 918233 A GB918233 A GB 918233A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mirror
- gap
- viewfinder
- range
- rangefinder
- 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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/18—Focusing aids
- G03B13/20—Rangefinders coupled with focusing arrangements, e.g. adjustment of rangefinder automatically focusing camera
Abstract
918,233. Range-viewfinders. VOIGTLANDER A.G. Feb. 2, 1959 [March 12, 1958], No. 3616/59. Classes 97 (1) and 98 (1). A range-viewfinder has a short home base rangefinder combined with an " Albada " viewfinder in which the beam splitter of the rangefinder, which is inclined to the viewfinder axis, is spaced at a distance from the part-transparent concave mirror of the " Albada " viewfinder which is equal to <SP>2</SP>/ 5 or less of the focal length of this mirror and a gap is provided in the reflective coating of the concave mirror so dimensioned that the rangefinder images are both formed by rays which pass through or are reflected at only one part transparent reflecting surface. In the range-viewfinder shown in Fig. 7 the viewfinder comprises an objective 22, a concave half-silvered mirror 28 having a gap 29, which may be elliptical or any other shape, a frame 26 and an eye-piece 21. The range-finder comprises a wedge 37, 36, mirror 35 and a halfsilvered mirror 30, one end of which adjoins part of the concave mirror and the other part extends beyond the edge of the gap. In other embodiments the beam splitter may be placed behind, in front of, or at the centre of the gap 29; it may be formed on a lens which is placed adjacent to and in front of or behind the gap. Moreover, if the ends of the beam splitter overlap the edges of the gap, either one or both may be connected to said edges either directly or by a half-silvered mirror, or this mirror can be arranged as shown in Fig. 11.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEV14036A DE1067683B (en) | 1958-03-12 | 1958-03-12 | Rangefinder for photographic use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB918233A true GB918233A (en) | 1963-02-13 |
Family
ID=7574435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB361659A Expired GB918233A (en) | 1958-03-12 | 1959-02-02 | Improvements in and relating to range-view-finders |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH364980A (en) |
| DE (1) | DE1067683B (en) |
| GB (1) | GB918233A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1211929B (en) * | 1960-11-15 | 1966-03-03 | Voigtlaender Ag | Photographic viewfinder with reflection of the frame of the image field |
| DE1772079B1 (en) * | 1968-03-28 | 1971-08-26 | Leitz Ernst Gmbh | Device for adapting and / or measuring the misalignment and directional errors of the optical axes of two mutually independent assemblies |
-
1958
- 1958-03-12 DE DEV14036A patent/DE1067683B/en active Pending
- 1958-10-25 CH CH6543858A patent/CH364980A/en unknown
-
1959
- 1959-02-02 GB GB361659A patent/GB918233A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1067683B (en) | 1959-10-22 |
| CH364980A (en) | 1962-10-15 |
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