GB1218704A - Lens system - Google Patents
Lens systemInfo
- Publication number
- GB1218704A GB1218704A GB33044/69A GB3304469A GB1218704A GB 1218704 A GB1218704 A GB 1218704A GB 33044/69 A GB33044/69 A GB 33044/69A GB 3304469 A GB3304469 A GB 3304469A GB 1218704 A GB1218704 A GB 1218704A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- elements
- lenses
- positive meniscus
- doublet
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
1,218,704. Lenses. INTERNATIONAL BUSINESS MACHINES CORP. July 1, 1969 [July 15, 1968], No.33044/69. Heading.G2J. A lens system, e.g. a reduction lens, comprises nine optically aligned lens elements, the first, second, fifth, eighth and ninth elements being singlet lenses, the third and fourth elements forming a first doublet, the sixth and seventh elements forming a second doublet, and a diaphragm optically aligned with the elements and positioned edjacent the fifth lens element. The first and second elements are positive meniscus lenses, the third and fourth together form a positive meniscus lens, the fifth lens may be a positive meniscus, the sixth and seventh elements together form a negative meniscus lens, the eighth element is a negative meniscus lens and the ninth element is a bi-convex lens. If desired the fifth element may be bi-concave. Optical data for two examples is given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74483068A | 1968-07-15 | 1968-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1218704A true GB1218704A (en) | 1971-01-13 |
Family
ID=24994129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33044/69A Expired GB1218704A (en) | 1968-07-15 | 1969-07-01 | Lens system |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3540800A (en) |
| DE (1) | DE1935521A1 (en) |
| FR (1) | FR2012947A1 (en) |
| GB (1) | GB1218704A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3797916A (en) * | 1971-01-20 | 1974-03-19 | Canon Kk | High resolving-power duplicating lens of unit magnification |
| US3733115A (en) * | 1971-05-17 | 1973-05-15 | Austin Co | Symmetrical optical lens system |
| US3804493A (en) * | 1972-04-06 | 1974-04-16 | Olympus Optical Co | Accurate lens systems for producing an extremely small image in a reduced scale |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481639A (en) * | 1945-08-23 | 1949-09-13 | Eastman Kodak Co | High-aperture copying lens system |
| CH311283A (en) * | 1952-03-05 | 1955-11-30 | Voigtlaender Ag | Photographic lens of the extended triplet type. |
| US2846923A (en) * | 1957-02-25 | 1958-08-12 | Farrand Optical Co Inc | High speed objective lens with anastigmatically flattened field |
-
1968
- 1968-07-15 US US744830A patent/US3540800A/en not_active Expired - Lifetime
-
1969
- 1969-06-19 FR FR6920451A patent/FR2012947A1/fr not_active Withdrawn
- 1969-07-01 GB GB33044/69A patent/GB1218704A/en not_active Expired
- 1969-07-12 DE DE19691935521 patent/DE1935521A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3540800A (en) | 1970-11-17 |
| DE1935521A1 (en) | 1970-01-22 |
| FR2012947A1 (en) | 1970-03-27 |
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