GB546035A - Improvements in or relating to optical objectives - Google Patents
Improvements in or relating to optical objectivesInfo
- Publication number
- GB546035A GB546035A GB1802540A GB1802540A GB546035A GB 546035 A GB546035 A GB 546035A GB 1802540 A GB1802540 A GB 1802540A GB 1802540 A GB1802540 A GB 1802540A GB 546035 A GB546035 A GB 546035A
- Authority
- GB
- United Kingdom
- Prior art keywords
- convergent
- divergent
- taylor
- objective
- focal length
- 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
546,035. Lenses. TAYLOR, TAYLOR & HOBSON, Ltd., and WYNNE, C. G. Dec. 23, 1940, No. 18025. [Class 97 (i)] In an objective comprising four air-spaced components, of which the first and third are convergent and the second a compound divergent meniscus with air-exposed surfaces convex to the front, the radius of the front surface Re of the third component is numerically greater than 2.5 times the equivalent focal length of the objective and is positive or negative. The fourth component may be of zero power or be slightly convergent, may comprise a divergent element cemented in front of a convergent element having a mean refractive index between .06 and .12 greater than that of the divergent element, and may have an axial thickness lying between .2 and .35 times the equivalent focal length. Data for one example are set out. Specification 407,156 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1802540A GB546035A (en) | 1940-12-23 | 1940-12-23 | Improvements in or relating to optical objectives |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1802540A GB546035A (en) | 1940-12-23 | 1940-12-23 | Improvements in or relating to optical objectives |
Publications (1)
Publication Number | Publication Date |
---|---|
GB546035A true GB546035A (en) | 1942-06-24 |
Family
ID=10105341
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1802540A Expired GB546035A (en) | 1940-12-23 | 1940-12-23 | Improvements in or relating to optical objectives |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB546035A (en) |
-
1940
- 1940-12-23 GB GB1802540A patent/GB546035A/en not_active Expired
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