GB902537A - Improvements in or relating to lenses - Google Patents
Improvements in or relating to lensesInfo
- Publication number
- GB902537A GB902537A GB1159959A GB1159959A GB902537A GB 902537 A GB902537 A GB 902537A GB 1159959 A GB1159959 A GB 1159959A GB 1159959 A GB1159959 A GB 1159959A GB 902537 A GB902537 A GB 902537A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- doublet
- principal focus
- prisms
- spherical surface
- 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
- 238000005452 bending Methods 0.000 abstract 2
- 239000013256 coordination polymer Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
902,537. Fresnel lenses. JOBLING & CO. Ltd., JAMES A. April 6, 1960 [April 6, 1959], No. 11599/59. Class 97 (1). A doublet comprises first and second Fresnel lenses each having several concentric prisms, the first lens being between the second lens and the principal focus of the doublet and the equivalent bending surfaces of the prisms of the first lens being disposed on a spherical surface which has the principal focus of the doublet as its centre, each prism of the first lens lying in the position of minimum deviation with respect to incident rays proceeding from the principal focus of the doublet and the corresponding refracted rays. As shown, the doublet comprises Fresnel lenses A and B each consisting of concentric prisms P and a central portion CP. The lens A is constructed, as described in Specification 902,536 so that the hypothetical surface of each prism containing the points of intersection of incident rays proceed from the principal focus of the lens and the corresponding refracted rays cuts a spherical surface having the principal focus of the lens A as its centre. In the lens B, the equivalent bending surfaces of the prisms are disposed about a spherical surface centred on the principal focus of the doublet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1159959A GB902537A (en) | 1959-04-06 | 1959-04-06 | Improvements in or relating to lenses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1159959A GB902537A (en) | 1959-04-06 | 1959-04-06 | Improvements in or relating to lenses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB902537A true GB902537A (en) | 1962-08-01 |
Family
ID=9989213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1159959A Expired GB902537A (en) | 1959-04-06 | 1959-04-06 | Improvements in or relating to lenses |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB902537A (en) |
-
1959
- 1959-04-06 GB GB1159959A patent/GB902537A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1512652A (en) | Single-element optical lens | |
| GB911754A (en) | Ophtalmometer | |
| GB1412954A (en) | Catoptric lens arrangement | |
| ES8305939A1 (en) | Single lens having one spherical and one aspherical refractive surface | |
| GB772912A (en) | An optical system of high acceptance angle | |
| GB902536A (en) | Improvements in or relating to lenses | |
| GB902537A (en) | Improvements in or relating to lenses | |
| JPS52130631A (en) | Photographic lens of large aperture and super wide angle | |
| JPS51148440A (en) | Microscopic reflecting oriective-lens | |
| GB998191A (en) | Improvements relating to lenses and to variable optical lens systems formed of such lenses | |
| GB1088192A (en) | Photographic lens systems | |
| GB902535A (en) | Improvements in or relating to lenses | |
| GB956543A (en) | Two-observer microscope equipment particularly for surgical operations | |
| GB978555A (en) | Wide aperture projection objective of variable focal length | |
| GB1140985A (en) | Improvements in achromatic lens systems | |
| GB1041118A (en) | Prismatic lens | |
| GB1048001A (en) | Improvements relating to contact lenses | |
| ES8604354A1 (en) | Lens-shaped optical cone body | |
| GB930550A (en) | Lenses | |
| GB892005A (en) | Photographic objective for picture-taking or projection | |
| JPS5232345A (en) | Objective lens | |
| STULER | Experiences With Light | |
| JPS5233526A (en) | Wide angle lens of retrofocus type | |
| GB880476A (en) | Low-distortion wide-aperture optical magnifiers | |
| GB888028A (en) | Electrophoresis apparatus |