GB1426127A - Distortion free objective for microcopying - Google Patents
Distortion free objective for microcopyingInfo
- Publication number
- GB1426127A GB1426127A GB518374A GB518374A GB1426127A GB 1426127 A GB1426127 A GB 1426127A GB 518374 A GB518374 A GB 518374A GB 518374 A GB518374 A GB 518374A GB 1426127 A GB1426127 A GB 1426127A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- lens group
- image side
- focal length
- compound
- 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
- G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
1426127 Objectives CARL ZEISS JENA VEB 5 Feb 1974 [6 Feb 1973] 05183/74 Heading G2J An objective of focal length f 1 , for use in micro-copying, comprises an object side lens group and an image side lens group separated by a distance l 3 greater than f 1 , and has an image side numerical aperture of at least 0.5 and an image field diameter of 0.15f; the object side lens group comprises a positive lens, followed by a negative lens and a second positive lens, the air gaps l 1 , l 2 between the lens satisfying the inequalition 0.6f<l 1 < 1.8f and 1.1f<l 2 <2f, the focal length of the first positive lens being between 4f and 8f, that of the negative lens being between -1.7f and -3f, while the focal length of the whole lens group is greater than 6f; the image side lens group comprises two compound lenses followed by a converging lens and a meniscus having a thickness between 0.5f and 0.75f. In Fig. 1, each compound lens of the image side lens group is formed of two cemented elements. In Fig. 3, the first compound lens consists of three cemented elements. Specific values of the radii of curvature, thickness, separation, refractive index &c. of the lenses are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD16868173A DD102819A1 (en) | 1973-02-06 | 1973-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1426127A true GB1426127A (en) | 1976-02-25 |
Family
ID=5489984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB518374A Expired GB1426127A (en) | 1973-02-06 | 1974-02-05 | Distortion free objective for microcopying |
Country Status (5)
| Country | Link |
|---|---|
| JP (2) | JPS5426169B2 (en) |
| DD (1) | DD102819A1 (en) |
| DE (1) | DE2348305A1 (en) |
| FR (1) | FR2216593B3 (en) |
| GB (1) | GB1426127A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5432318A (en) * | 1977-08-17 | 1979-03-09 | Olympus Optical Co Ltd | Lens for micro-reduction photography |
| DE4138626C1 (en) * | 1991-11-25 | 1992-12-24 | Etb, Endoskopische Technik Gmbh Berlin, O-1170 Berlin, De | Lens objective for endoscope - has lens-prism group and collector lens group with diffusing cemented surface |
-
1973
- 1973-02-06 DD DD16868173A patent/DD102819A1/xx unknown
- 1973-09-26 DE DE19732348305 patent/DE2348305A1/en active Pending
- 1973-09-28 FR FR7334884A patent/FR2216593B3/fr not_active Expired
-
1974
- 1974-02-05 GB GB518374A patent/GB1426127A/en not_active Expired
- 1974-02-06 JP JP1528674A patent/JPS5426169B2/ja not_active Expired
-
1979
- 1979-05-04 JP JP5411379A patent/JPS5577711A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5577711A (en) | 1980-06-11 |
| FR2216593A1 (en) | 1974-08-30 |
| FR2216593B3 (en) | 1976-08-27 |
| DE2348305A1 (en) | 1974-08-08 |
| DD102819A1 (en) | 1973-12-20 |
| JPS563527B2 (en) | 1981-01-26 |
| JPS5047617A (en) | 1975-04-28 |
| JPS5426169B2 (en) | 1979-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |