GB692743A - Improvements in or relating to optical objectives - Google Patents
Improvements in or relating to optical objectivesInfo
- Publication number
- GB692743A GB692743A GB574251A GB574251A GB692743A GB 692743 A GB692743 A GB 692743A GB 574251 A GB574251 A GB 574251A GB 574251 A GB574251 A GB 574251A GB 692743 A GB692743 A GB 692743A
- Authority
- GB
- United Kingdom
- Prior art keywords
- objective
- rear surface
- aspherical
- taylor
- march
- 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
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
- G02B17/086—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors wherein the system is made of a single block of optical material, e.g. solid catadioptric systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0804—Catadioptric systems using two curved mirrors
- G02B17/0808—Catadioptric systems using two curved mirrors on-axis systems with at least one of the mirrors having a central aperture
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0884—Catadioptric systems having a pupil corrector
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
692,743. Optical objectives. WREATHALL, W. M., and TAYLOR, TAYLOR, & HOBSON, Ltd. March 4, 1952 [March 9, 1951], No. 5742/51. Class 97 (i). A corrected objective comprises a front refracting member air-spaced from a meniscus rear member having its spherical outer surfaces concave to the front and its front surface centrally coated and rear surface annularly coated so as to be reflecting, so that light entering the objective through the front member will be refracted at the curved outer zone of the front surface of the rear member, reflected successively by the said annular and control reflecting portions and will emerge by refraction at the curved central zone of the rear surface. Numerical data are given for one example of the objective shown in which all the surfaces of the front member are spherical, for one example in which the surface R<SP>1</SP> is aspherical and of the form x = a 2 y<SP>2</SP> + a 4 y<SP>4</SP> + ... , and for one example in which the two elements of the front member are cemented together, the rear surface of this doublet being aspherical. Specifications 541,650 and 541,652 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB574251A GB692743A (en) | 1951-03-09 | 1951-03-09 | Improvements in or relating to optical objectives |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB574251A GB692743A (en) | 1951-03-09 | 1951-03-09 | Improvements in or relating to optical objectives |
Publications (1)
Publication Number | Publication Date |
---|---|
GB692743A true GB692743A (en) | 1953-06-10 |
Family
ID=9801801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB574251A Expired GB692743A (en) | 1951-03-09 | 1951-03-09 | Improvements in or relating to optical objectives |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB692743A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2852798A1 (en) * | 1977-12-07 | 1979-07-05 | Canon Kk | OPTICAL SCANNING DEVICE |
-
1951
- 1951-03-09 GB GB574251A patent/GB692743A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2852798A1 (en) * | 1977-12-07 | 1979-07-05 | Canon Kk | OPTICAL SCANNING DEVICE |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB680185A (en) | Improvements in wide angle objectives | |
GB692743A (en) | Improvements in or relating to optical objectives | |
GB741511A (en) | Improvements in or relating to optical objectives | |
GB609669A (en) | Improvements in or relating to optical objectives | |
GB740530A (en) | Improvements in wide angle objectives | |
GB547739A (en) | Improvements in or relating to optical objectives | |
GB696159A (en) | Improvements in or relating to optical objectives | |
GB575076A (en) | Improvements relating to optical lenses | |
GB696167A (en) | Four lens objective | |
GB583297A (en) | Improvements in or relating to optical objectives | |
GB902536A (en) | Improvements in or relating to lenses | |
GB680221A (en) | Improvements relating to microscope objectives | |
GB601837A (en) | Improvements in or relating to optical objectives | |
GB575441A (en) | Improvements in or relating to optical objectives | |
GB593835A (en) | Improvements in or relating to optical objectives | |
GB697366A (en) | Improvements in or relating to optical objectives | |
GB672822A (en) | Improvements in or relating to optical objectives | |
GB575075A (en) | Improvements relating to optical lenses | |
GB690405A (en) | Improvements in or relating to optical objectives | |
GB690404A (en) | Improvements in or relating to optical objectives | |
GB686196A (en) | Improvements in or relating to optical objectives | |
GB677802A (en) | Improvements in optical eye-pieces, particularly for wide angles | |
GB595422A (en) | Photographic objectives corrected spherically, astigmatically and for coma for one or more colours | |
GB656347A (en) | Improvements in or relating to optical objectives of the telephoto type | |
GB714565A (en) | Photographic objective |