GB575441A - Improvements in or relating to optical objectives - Google Patents
Improvements in or relating to optical objectivesInfo
- Publication number
- GB575441A GB575441A GB1476444A GB1476444A GB575441A GB 575441 A GB575441 A GB 575441A GB 1476444 A GB1476444 A GB 1476444A GB 1476444 A GB1476444 A GB 1476444A GB 575441 A GB575441 A GB 575441A
- Authority
- GB
- United Kingdom
- Prior art keywords
- convergent
- component
- components
- taylor
- double
- 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
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
575,441. Lenses. TAYLOR, TAYLOR, & HOBSON, Ltd., and COX, A. Aug. 2, 1944, No. 14764. [Class 97 (i)] An objective corrected for spherical and chromatic aberrations, coma, astigmatism, field curvature and also for oblique spherical aberration, comprises a simple divergent corriponent disposed behind two convergent components and in front of another convergent component, the front and rear components being simple whilst the convergent second component is compound and consists of a double convex element cemented in front of a double concave element, the mean refractive index of the double convex element exceeding that of the double concave element by at least 0.06, the radius of curvature of the front surface of the simple divergent third component bearing to that of its rear surface a ratio between 1.0 and 2.0, and the axial air separation between the second and third components lying between 0.04 and 0.085 times the equivalent focal length of the objective. Data are given for two examples.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1476444A GB575441A (en) | 1944-08-02 | 1944-08-02 | Improvements in or relating to optical objectives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1476444A GB575441A (en) | 1944-08-02 | 1944-08-02 | Improvements in or relating to optical objectives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB575441A true GB575441A (en) | 1946-02-18 |
Family
ID=10047073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1476444A Expired GB575441A (en) | 1944-08-02 | 1944-08-02 | Improvements in or relating to optical objectives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB575441A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2600208A (en) * | 1949-07-14 | 1952-06-10 | Taylor Taylor & Hobson Ltd | Four component objectives with second component a convergent cemented doublet having a dispersive internal contact surface |
| JPS512369B1 (en) * | 1971-04-09 | 1976-01-26 | ||
| CZ305522B6 (en) * | 2014-09-26 | 2015-11-11 | Pramacom-Ht, Spol. S R.O. | Objective |
-
1944
- 1944-08-02 GB GB1476444A patent/GB575441A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2600208A (en) * | 1949-07-14 | 1952-06-10 | Taylor Taylor & Hobson Ltd | Four component objectives with second component a convergent cemented doublet having a dispersive internal contact surface |
| JPS512369B1 (en) * | 1971-04-09 | 1976-01-26 | ||
| CZ305522B6 (en) * | 2014-09-26 | 2015-11-11 | Pramacom-Ht, Spol. S R.O. | Objective |
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