GB978512A - Improvements in or relating to optical image-forming devices - Google Patents
Improvements in or relating to optical image-forming devicesInfo
- Publication number
- GB978512A GB978512A GB223362A GB223362A GB978512A GB 978512 A GB978512 A GB 978512A GB 223362 A GB223362 A GB 223362A GB 223362 A GB223362 A GB 223362A GB 978512 A GB978512 A GB 978512A
- Authority
- GB
- United Kingdom
- Prior art keywords
- objective
- lenses
- angle
- relating
- optical image
- 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
- G02B15/00—Optical objectives with means for varying the magnification
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
978, 512. Wide angle abutments. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Jan. 22, 1962 [Jan. 25, 1961], No. 2233/62. Heading G2J. To increase the angle of field of an objective L0, three or more afocal systems, each consisting of a positive lens L4, L6, L8 ... and a negative lens L3, Ls, L7 ..., are disposed as the long conjugate side of the objective L0 with their axes parallel to the optical axis of the objective. The positive lenses may be integral as also may the negative lenses, the two lens units being mounted in a casing. This casing 18 may be pivoted to the objective end of a telescope 15 so that it may be moved into the light path when it is desired to increase the field of view. The lenses of each afocal system may be cylindrical so that the angle of view is increased in one direction only.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR850680A FR1286798A (en) | 1961-01-25 | 1961-01-25 | Optical device for increasing the field of a telescope |
Publications (1)
Publication Number | Publication Date |
---|---|
GB978512A true GB978512A (en) | 1964-12-23 |
Family
ID=8747416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB223362A Expired GB978512A (en) | 1961-01-25 | 1962-01-22 | Improvements in or relating to optical image-forming devices |
Country Status (4)
Country | Link |
---|---|
AT (1) | AT238962B (en) |
DE (1) | DE1917066U (en) |
FR (1) | FR1286798A (en) |
GB (1) | GB978512A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2130038A1 (en) * | 1970-06-29 | 1973-01-04 | Pusch Guenter Dipl Ing Dr Ing | PROCEDURE FOR MONITORING AIRSPACE FOR INFRARED AND LASER RAYS |
-
1961
- 1961-01-25 FR FR850680A patent/FR1286798A/en not_active Expired
-
1962
- 1962-01-22 GB GB223362A patent/GB978512A/en not_active Expired
- 1962-01-23 DE DE1962N0013395 patent/DE1917066U/en not_active Expired
- 1962-01-23 AT AT52062A patent/AT238962B/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2130038A1 (en) * | 1970-06-29 | 1973-01-04 | Pusch Guenter Dipl Ing Dr Ing | PROCEDURE FOR MONITORING AIRSPACE FOR INFRARED AND LASER RAYS |
Also Published As
Publication number | Publication date |
---|---|
FR1286798A (en) | 1962-03-09 |
DE1917066U (en) | 1965-06-03 |
AT238962B (en) | 1965-03-10 |
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