GB645619A - Improvements in or relating to optical projection systems - Google Patents
Improvements in or relating to optical projection systemsInfo
- Publication number
- GB645619A GB645619A GB2728447A GB2728447A GB645619A GB 645619 A GB645619 A GB 645619A GB 2728447 A GB2728447 A GB 2728447A GB 2728447 A GB2728447 A GB 2728447A GB 645619 A GB645619 A GB 645619A
- Authority
- GB
- United Kingdom
- Prior art keywords
- image
- chart
- screen
- telescope
- lens
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/0004—Microscopes specially adapted for specific applications
- G02B21/0016—Technical microscopes, e.g. for inspection or measuring in industrial production processes
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Telescopes (AREA)
Abstract
645,619. Radiolocation. COSSOR, Ltd., A. C., WILLIAMS, B. C. FLEMING-, and JENKINS, J. W. Oct. 10, 1947, No. 27284. [Class 40 (vii)] [Also in Group XX] Apparatus for producing at a viewing point 17 a vertical image of the screen of a plan position indicator 2, which may be of the form described in Specification 609,703, superimposed upon an image of a chart 18 of the area scanned by a radar aerial comprises a lens 7 and hinged mirror 3 mounted in a casing 4, rotatable in bearings 6 about an axis normal to the screen 1, which lies substantially in the focal plane of lens 7. The parallel light from lens 7 passes through a telescope 8 and is directed by a semitransparent reflector 16 to the observer at 17, light from the chart 18 being transmitted by the mirror 16. Telescope 8 is mounted for axial sliding movement in a projection 15 of the casing 4 so that the image of screen 1 may be displaced relative to that of the chart 18. Polarizers 19, 20 are provided to reduce the intensity of the chart image to that of the screen image and a telescope 8 of variable magnification may be used to alter the scale of the screen image relatively to that of the chart image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2728447A GB645619A (en) | 1947-10-10 | 1947-10-10 | Improvements in or relating to optical projection systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2728447A GB645619A (en) | 1947-10-10 | 1947-10-10 | Improvements in or relating to optical projection systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB645619A true GB645619A (en) | 1950-11-01 |
Family
ID=10257074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2728447A Expired GB645619A (en) | 1947-10-10 | 1947-10-10 | Improvements in or relating to optical projection systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB645619A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2780132A (en) * | 1952-03-14 | 1957-02-05 | Barr & Stroud Ltd | Optical comparator |
| US3695769A (en) * | 1970-01-30 | 1972-10-03 | Wickman Mach Tool Sales Ltd | Optical comparators |
| US4249797A (en) * | 1979-05-24 | 1981-02-10 | Steve Sendecki | Dual image viewer with mirror adjusting means |
-
1947
- 1947-10-10 GB GB2728447A patent/GB645619A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2780132A (en) * | 1952-03-14 | 1957-02-05 | Barr & Stroud Ltd | Optical comparator |
| US3695769A (en) * | 1970-01-30 | 1972-10-03 | Wickman Mach Tool Sales Ltd | Optical comparators |
| US4249797A (en) * | 1979-05-24 | 1981-02-10 | Steve Sendecki | Dual image viewer with mirror adjusting means |
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