JPS57156513A - Automatic leveling instrument - Google Patents
Automatic leveling instrumentInfo
- Publication number
- JPS57156513A JPS57156513A JP4200181A JP4200181A JPS57156513A JP S57156513 A JPS57156513 A JP S57156513A JP 4200181 A JP4200181 A JP 4200181A JP 4200181 A JP4200181 A JP 4200181A JP S57156513 A JPS57156513 A JP S57156513A
- Authority
- JP
- Japan
- Prior art keywords
- alpha
- correction system
- optical axis
- objective lens
- correction
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 abstract 5
- 230000004907 flux Effects 0.000 abstract 2
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
- G01C5/02—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels involving automatic stabilisation of the line of sight
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To obtain an automatic leveling instrument of simple constitution free of an error in correction due to fluctuations of temperature by suspending a correcting reflective member, equipped with a reflective surface for upside-down inversion, on some point on an optical axis as a fulcrum in one body, and setting this fulcrum at a position a half as far as the focal length of an objective lens. CONSTITUTION:For example, an interval between a correction system 9 and an objective lens 4 is l1, an interval between the correction system 9 and a center point 2 of rotation for inclination is l2, and an interval between the correction system 9 and an index 7 is l3; and a main body slants around the point 2 by a fine angle alpha. In this case, the objective lens 4' is displaced downward by (l1-l2)alpha on the basis of an optical axis 1, and the correction system 9 is also displaced upward by l2alpha. Then, luminous flux which travels horizontally from the body to be collimated and strikes the objective lens 4' travels l1alpha lower than the optical axis 1 in parallel to the optical axis 1 to illuminate the correction system 9. Therefore, the luminous flux of collimation displaced downward by (l1+l2)alpha is incident to the correction system 9. On the other hand, the index 7 is displaced upward by (l2+l3)alpha on the basis of the optical axis 1, so correction meeting a requirement (l1+l2)alpha=(l2+l3)alpha, i.e. l1=l3 is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4200181A JPS57156513A (en) | 1981-03-23 | 1981-03-23 | Automatic leveling instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4200181A JPS57156513A (en) | 1981-03-23 | 1981-03-23 | Automatic leveling instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57156513A true JPS57156513A (en) | 1982-09-27 |
Family
ID=12623957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4200181A Pending JPS57156513A (en) | 1981-03-23 | 1981-03-23 | Automatic leveling instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57156513A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS502823A (en) * | 1973-05-10 | 1975-01-13 |
-
1981
- 1981-03-23 JP JP4200181A patent/JPS57156513A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS502823A (en) * | 1973-05-10 | 1975-01-13 |
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