FR360807A - Optical device for measuring instruments - Google Patents
Optical device for measuring instrumentsInfo
- Publication number
- FR360807A FR360807A FR360807DA FR360807A FR 360807 A FR360807 A FR 360807A FR 360807D A FR360807D A FR 360807DA FR 360807 A FR360807 A FR 360807A
- Authority
- FR
- France
- Prior art keywords
- optical device
- measuring instruments
- instruments
- measuring
- optical
- 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 effect Effects 0.000 title 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
- G01C17/02—Magnetic compasses
- G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
- G01C17/20—Observing the compass card or needle
- G01C17/24—Illumination
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J4/00—Measuring polarisation of light
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR360807T | 1905-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR360807A true FR360807A (en) | 1906-05-04 |
Family
ID=1408486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR360807D Expired FR360807A (en) | 1905-11-28 | 1905-11-28 | Optical device for measuring instruments |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR360807A (en) |
-
1905
- 1905-11-28 FR FR360807D patent/FR360807A/en not_active Expired
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