GB556180A - Improvements relating to collimators - Google Patents
Improvements relating to collimatorsInfo
- Publication number
- GB556180A GB556180A GB5839/42A GB583942A GB556180A GB 556180 A GB556180 A GB 556180A GB 5839/42 A GB5839/42 A GB 5839/42A GB 583942 A GB583942 A GB 583942A GB 556180 A GB556180 A GB 556180A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- tube
- unit
- sextant
- diaphragm
- 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
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
556,180. Collimators. LINK AVIATION DEVICES, Inc. April 30, 1942, No. 5839. Convention date, May 15, 1941. [Class 97 (i)] A collimator comprises a tube having a lens at one end, a reflector at the other end, and a light source in housing means at one side of and adjacent the lens so placed that a parallel beam emerges from the lens ; the collimator may be tiltably mounted as described in Specification 556,207, and may be used for testing the readings of sextants. As shown, a conical tube 22 has a projecting hollow rib 118 adjustably housing a lighting unit 128 adjacent a collimating lens 191, and supporting a dry cell 120 to supply the unit 128. A plane surfacereflecting mirror 174 is carried at the smaller end of the tube 22. The unit 128 contains a lamp, Fig. 5, 140 having a concentrated filament, a diaphragm 168 having a central pinhole, diffusing screens 170, 172 between the lamp and pinhole, and a diaphragm 164 having an aperture restricting the cone of light rays to one that is wholly received by the lens 191. The tube 22 is adjustably mounted as described in Specification 556,207, and has a vernier scale 72 and reading mark as therein described. It may be set to agree with any altitude reading of the sextant that is to be tested, and the sextant may be placed in any part of the collimated beam for the tests, the image of the points source forming the equivalent of a star.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US556180XA | 1941-05-15 | 1941-05-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB556180A true GB556180A (en) | 1943-09-23 |
Family
ID=21999053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5839/42A Expired GB556180A (en) | 1941-05-15 | 1942-04-30 | Improvements relating to collimators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB556180A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207725A (en) * | 2019-07-05 | 2019-09-06 | 中国人民解放军海军航空大学青岛校区 | Guide rail sliding chute formula lubber line calibrating installation |
-
1942
- 1942-04-30 GB GB5839/42A patent/GB556180A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207725A (en) * | 2019-07-05 | 2019-09-06 | 中国人民解放军海军航空大学青岛校区 | Guide rail sliding chute formula lubber line calibrating installation |
| CN110207725B (en) * | 2019-07-05 | 2024-05-31 | 中国人民解放军海军航空大学青岛校区 | Guide rail chute type course marking calibrating device |
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