GB536556A - Improvements in or relating to telephoto objectives - Google Patents
Improvements in or relating to telephoto objectivesInfo
- Publication number
- GB536556A GB536556A GB10617/40A GB1061740A GB536556A GB 536556 A GB536556 A GB 536556A GB 10617/40 A GB10617/40 A GB 10617/40A GB 1061740 A GB1061740 A GB 1061740A GB 536556 A GB536556 A GB 536556A
- Authority
- GB
- United Kingdom
- Prior art keywords
- convex
- cemented
- refractive index
- less
- negative
- 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
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/02—Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Joining Of Glass To Other Materials (AREA)
- Photovoltaic Devices (AREA)
Abstract
536,556. Lenses. KODAK, Ltd. June 20, 1940, No. 10617. Convention date, Oct. 28, 1939. Drawings to Specification. [Class 97 (i)] The front component of a telephoto objective is positive and consists of at least two elements ; the rear component is negative, has both outer surfaces concave to the front, and of radii between 0.1 and 0.5 times F, and has a cemented surface convex to the front and of radius between 0.25 times F and F. Of the glass following the cemented surface, the refractive index exceeds that of the glass preceding that surface by at least 0.07, and the dispersive index may be less by 15 or less. The front component may consist of a bi-convex element cemented to the front of a negative element having a refractive index at least 0.1 greater than that of the bi-convex element. The spacing of the components may be between “ F and ¥ F. Desirable closer limits and complete particulars of two examples are set out in the Specification.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US536556XA | 1939-10-28 | 1939-10-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB536556A true GB536556A (en) | 1941-05-19 |
Family
ID=21985722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10617/40A Expired GB536556A (en) | 1939-10-28 | 1940-06-20 | Improvements in or relating to telephoto objectives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB536556A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2543354A (en) * | 1949-01-05 | 1951-02-27 | Taylor Taylor & Hobson Ltd | Optical objective of the telephoto type |
| US3612646A (en) * | 1969-12-11 | 1971-10-12 | Remington Arms Co Inc | Rifle telescopic gun sight |
| CN108279491A (en) * | 2018-04-19 | 2018-07-13 | 长春理工大学 | A kind of long reach, high-resolution videomicroscopy for biology observation |
-
1940
- 1940-06-20 GB GB10617/40A patent/GB536556A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2543354A (en) * | 1949-01-05 | 1951-02-27 | Taylor Taylor & Hobson Ltd | Optical objective of the telephoto type |
| US3612646A (en) * | 1969-12-11 | 1971-10-12 | Remington Arms Co Inc | Rifle telescopic gun sight |
| CN108279491A (en) * | 2018-04-19 | 2018-07-13 | 长春理工大学 | A kind of long reach, high-resolution videomicroscopy for biology observation |
| CN108279491B (en) * | 2018-04-19 | 2024-04-16 | 长春理工大学 | Long working distance and high resolution video microscope for biological observation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB536556A (en) | Improvements in or relating to telephoto objectives | |
| GB522651A (en) | Improvements in or relating to optical objectives | |
| GB538653A (en) | Improvements in or relating to optical objectives | |
| GB547739A (en) | Improvements in or relating to optical objectives | |
| GB555464A (en) | Improvements in or relating to photographic objectives | |
| GB579521A (en) | Improvements in or relating to telephoto lenses | |
| GB550519A (en) | Improvements in or relating to a telephoto objective | |
| GB583984A (en) | Photographic lens | |
| GB477424A (en) | Improvements in objectives | |
| GB523062A (en) | Improvements in or relating to optical objectives | |
| GB517946A (en) | Improvements in and relating to photographic objectives | |
| GB561156A (en) | Improvements in or relating to optical objectives | |
| GB523218A (en) | Improvements in or relating to optical objectives | |
| GB548253A (en) | Improvements in or relating to photographic objectives | |
| GB1020462A (en) | ||
| GB232531A (en) | ||
| GB714565A (en) | Photographic objective | |
| GB565305A (en) | Improvements in or relating to photographic objectives | |
| GB506321A (en) | Improvements in microscope objectives | |
| GB532574A (en) | Improvements in or connected with lenses for optical purposes | |
| GB518467A (en) | Improvements in lens systems | |
| GB542508A (en) | Improvements in or relating to optical objectives | |
| GB499290A (en) | Improvements in or relating to optical objectives | |
| GB517386A (en) | Improvements in or relating to optical objectives | |
| GB523061A (en) | Improvements in or relating to optical objectives |