GB595647A - Improvements in optical parallax measuring instruments having a base, such as rangefinders - Google Patents
Improvements in optical parallax measuring instruments having a base, such as rangefindersInfo
- Publication number
- GB595647A GB595647A GB1361745A GB1361745A GB595647A GB 595647 A GB595647 A GB 595647A GB 1361745 A GB1361745 A GB 1361745A GB 1361745 A GB1361745 A GB 1361745A GB 595647 A GB595647 A GB 595647A
- Authority
- GB
- United Kingdom
- Prior art keywords
- base
- eye
- light
- image
- piece
- 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
- 230000003287 optical Effects 0.000 title 1
- 238000003780 insertion Methods 0.000 abstract 2
- 238000005259 measurement Methods 0.000 abstract 1
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
Abstract
595,647. Range-finders. BARR & STROUD, Ltd., and FRENCH, SIR J. W. May 30,1945, No. 13617. [Class 97 (i)] A short home base-finder has two eye-pieces, in one of which is formed a single image by light from one end of the base and in the other two images formed respectively by light from each end of the base. The instrument may thus be used for coincidence or overlapping observation with or without stereoscopic observation. Light from the left end of the base enters the eye-piece prism system at 34 and is divided by the semi-reflecting surface 19, half being directed to the left eye-piece by prism system A and the remainder via prism D and B to the right eye-piece. Light from the right-hand end of the base enters the prism B, which is of the type described in Specification 582,047, at 26 and forms an image either overlapping or separated from the other image. A shutter 25 on insertion permits the right eyepiece to be used for coincidence measurement, and the insertion of a shutter 24 permits stereoscopic observation. The eye-pieces are provided with stereoscopic scales and the images may all be erect or inverted or the image formed by the ray 37 may be opposite to the other two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES0173599A ES173599A1 (en) | 1945-05-30 | 1946-05-17 | AN OPTICAL PARALLEL MEASUREMENT INSTRUMENT, SUCH AS A TELEMETER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB595647A true GB595647A (en) | 1947-12-11 |
Family
ID=1729472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1361745A Expired GB595647A (en) | 1945-05-30 | 1945-05-30 | Improvements in optical parallax measuring instruments having a base, such as rangefinders |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB595647A (en) |
-
1945
- 1945-05-30 GB GB1361745A patent/GB595647A/en not_active Expired
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