GB149326A - Improvements in telemeters having the base-line in the instrument - Google Patents
Improvements in telemeters having the base-line in the instrumentInfo
- Publication number
- GB149326A GB149326A GB21604/20A GB2160420A GB149326A GB 149326 A GB149326 A GB 149326A GB 21604/20 A GB21604/20 A GB 21604/20A GB 2160420 A GB2160420 A GB 2160420A GB 149326 A GB149326 A GB 149326A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prism
- reflecting
- base
- systems
- degrees
- 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
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
- G01C3/10—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument
- G01C3/12—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument with monocular observation at a single point, e.g. coincidence type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Viewfinders (AREA)
- Optical Elements Other Than Lenses (AREA)
- Telescopes (AREA)
Abstract
149,326. Zeiss, C., [Firm of]. July 21, 1919, [Convention date]. Range-finders.-For the purpose of correcting the errors in short-home-base range-finders having two telescope systems and a reflecting system at each end, the forms and dispositions of the reflecting systems are such that one of the reflecting systems can be placed unaltered in front of the entrance aperture of the second reflecting system, thereby converting the range-finder into one having the base-line zero. Figs. 1 and 2 show one example, in which a pentagonal prism e<2> is rotated through 180 degrees in the plane of measurement into a position in front of the other reflecting system, constituted by a Porro prism system. Figs. 5 and 6 show an example in which two Porro prism systems g<1>, g<2> are used, the movable prisms being rotated through 180 degrees in the plane of the base line, and then through 90 degrees in a plane at right-angles, to the position indicated in broken lines. Among other examples described is that shown in Figs. 14, 15 and 16, in which the stationary prism system comprises two pentagonal prisms l<1>, l<3> united by a rhomboidal prism l<2> and the movable prism consists of a pentagonal prism l<4>.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE149326X | 1919-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB149326A true GB149326A (en) | 1920-12-02 |
Family
ID=5673274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21604/20A Expired GB149326A (en) | 1919-07-21 | 1920-07-19 | Improvements in telemeters having the base-line in the instrument |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB149326A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2510299A (en) * | 1945-01-01 | 1950-06-06 | Bell Telephone Labor Inc | Pulse-echo testing system |
-
1920
- 1920-07-19 GB GB21604/20A patent/GB149326A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2510299A (en) * | 1945-01-01 | 1950-06-06 | Bell Telephone Labor Inc | Pulse-echo testing system |
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