JPS5675611A - Lens for behind diaphragm - Google Patents
Lens for behind diaphragmInfo
- Publication number
- JPS5675611A JPS5675611A JP15206079A JP15206079A JPS5675611A JP S5675611 A JPS5675611 A JP S5675611A JP 15206079 A JP15206079 A JP 15206079A JP 15206079 A JP15206079 A JP 15206079A JP S5675611 A JPS5675611 A JP S5675611A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- group
- lenses
- widen
- shorten
- 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.)
- Granted
Links
Abstract
PURPOSE: To shorten the overall length of lenses and widen the blanket angle while keeping the brightness of about F2.8 by satisfying a prescribed condition for a lens group consisting of 3 groups and 4 pieces.
CONSTITUTION: The lens group consists of combined positive lenses of 3 groups and 4 pieces, that is, the 1st group of a meniscus positive lens, the 2nd group of a biconcave negative lens and the 3rd group of a biconvex positive lens and a meniscus negative lens. When stating composite focal length as f, the sum of the upper thickness from the axis of a lens and air interval as Σd, the focal length of the 1st group lens as f1 and the Abbe's number of the radius of curvature, interval and glass as respectively Rn, dn and νn, formulas (1)W(6) can be satisfied. Thus, it makes possible to shorten the overall length of these lenses, widen the blanket angle and, in addition, keep the brightness F2.8.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15206079A JPS5675611A (en) | 1979-11-26 | 1979-11-26 | Lens for behind diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15206079A JPS5675611A (en) | 1979-11-26 | 1979-11-26 | Lens for behind diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5675611A true JPS5675611A (en) | 1981-06-22 |
| JPH0119123B2 JPH0119123B2 (en) | 1989-04-10 |
Family
ID=15532170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15206079A Granted JPS5675611A (en) | 1979-11-26 | 1979-11-26 | Lens for behind diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5675611A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6325611A (en) * | 1986-07-17 | 1988-02-03 | Asahi Optical Co Ltd | Reading lens |
| JPH04115169U (en) * | 1991-03-22 | 1992-10-12 | 大日本印刷株式会社 | breathable packaging bags |
| JPH0687275U (en) * | 1993-05-28 | 1994-12-22 | 敏克 大内 | Powder packaging bag |
| JPH076130U (en) * | 1993-06-30 | 1995-01-27 | ダイワ包材株式会社 | Double bottom bag |
| KR101499981B1 (en) * | 2008-11-19 | 2015-03-06 | 엘지이노텍 주식회사 | Imaging Lens |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS508526A (en) * | 1973-05-19 | 1975-01-29 | ||
| JPS52152219A (en) * | 1976-06-11 | 1977-12-17 | Minolta Camera Co Ltd | Tessar type photographic lens |
| JPS5397824A (en) * | 1977-02-08 | 1978-08-26 | Olympus Optical Co Ltd | Camera lens of behind iris |
-
1979
- 1979-11-26 JP JP15206079A patent/JPS5675611A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS508526A (en) * | 1973-05-19 | 1975-01-29 | ||
| JPS52152219A (en) * | 1976-06-11 | 1977-12-17 | Minolta Camera Co Ltd | Tessar type photographic lens |
| JPS5397824A (en) * | 1977-02-08 | 1978-08-26 | Olympus Optical Co Ltd | Camera lens of behind iris |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6325611A (en) * | 1986-07-17 | 1988-02-03 | Asahi Optical Co Ltd | Reading lens |
| JPH04115169U (en) * | 1991-03-22 | 1992-10-12 | 大日本印刷株式会社 | breathable packaging bags |
| JPH0687275U (en) * | 1993-05-28 | 1994-12-22 | 敏克 大内 | Powder packaging bag |
| JPH076130U (en) * | 1993-06-30 | 1995-01-27 | ダイワ包材株式会社 | Double bottom bag |
| KR101499981B1 (en) * | 2008-11-19 | 2015-03-06 | 엘지이노텍 주식회사 | Imaging Lens |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0119123B2 (en) | 1989-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5573014A (en) | Photographic lens | |
| JPS55163510A (en) | Telephoto lens | |
| JPS54157620A (en) | Photographic telephoto lens | |
| JPS5659217A (en) | Lens for compact camera of short overall length using aspherical face | |
| JPS5691206A (en) | Wide-angle photographic lens of short overall length | |
| JPS5730814A (en) | Photographic lens | |
| JPS5581316A (en) | Lens system for copying | |
| JPS5643618A (en) | Attachment lens | |
| JPS5675611A (en) | Lens for behind diaphragm | |
| JPS56133713A (en) | Zoom lens | |
| JPS55147607A (en) | Retrofocus type wide angle photographic lens | |
| JPS5655915A (en) | Zoom lens | |
| JPS55121417A (en) | Telephoto lens of small telephoto rate | |
| JPS57171309A (en) | Lens for compact camera having short total length | |
| JPS5612613A (en) | Zoom lens | |
| JPS557712A (en) | Compact standard zoom lens | |
| JPS5619021A (en) | Retrofocus type wide angle lens | |
| JPS5659216A (en) | Standard lens with wide angle of view | |
| JPS57163212A (en) | Retrofocus wide-angle lens consisting of 5-sheets structure | |
| JPS5579406A (en) | Objective lens of microscope | |
| JPS55161207A (en) | Zoom lens of small size | |
| JPS54151442A (en) | Retrofocus type wide angle lens system | |
| JPS5555308A (en) | Endscope optical lens | |
| JPS5666814A (en) | Retrofocus type wide angle lens | |
| JPS5541434A (en) | Retrofocus type wide angle lens |