JPS56102819A - Small-sized photographic lens - Google Patents
Small-sized photographic lensInfo
- Publication number
- JPS56102819A JPS56102819A JP509980A JP509980A JPS56102819A JP S56102819 A JPS56102819 A JP S56102819A JP 509980 A JP509980 A JP 509980A JP 509980 A JP509980 A JP 509980A JP S56102819 A JPS56102819 A JP S56102819A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- meniscus lens
- positive
- lenses
- negative meniscus
- 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 obtain a compact lens of view angle 45.5° and F2, by satisfying prescribed conditions with the five-group five-lens constitution consisting of the positive meniscus lens, the positive meniscus lens, the negative meniscus lens, the negative meniscus lens, and the positive lens.
CONSTITUTION: The positive meniscus lens, the positive meniscus lens, the negative meniscus lens, the negative meniscus lens, and the positive lens are arranged in order from the object side and satisfy conditions of expressions (1)W(7). In these expressions, (f) indicates the focal length of the whole of the system, and N1, N2, N3 and N5 indicate refractive indexes of the first, the third and the fifth lenses for the d-line, and ν2, ν3 and ν5 are Abbe numbers of the second, the third and the fifth lenses, respectively, and R6 and R7 indicate radiuses of curvature of lens faces in the image side of the third lens and in the object side of the fourth lens, respectively, and ϕ1 indicates refractive force of the air lens between the second and the third lenses, and ϕ2 indicates refractive force of the fourth lens. As a result, a compact, high-precision, and standard lens is obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP509980A JPS56102819A (en) | 1980-01-18 | 1980-01-18 | Small-sized photographic lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP509980A JPS56102819A (en) | 1980-01-18 | 1980-01-18 | Small-sized photographic lens |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56102819A true JPS56102819A (en) | 1981-08-17 |
JPS6161365B2 JPS6161365B2 (en) | 1986-12-25 |
Family
ID=11601924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP509980A Granted JPS56102819A (en) | 1980-01-18 | 1980-01-18 | Small-sized photographic lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56102819A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4671626A (en) * | 1984-03-21 | 1987-06-09 | Minolta Camera Kabushiki Kaisha | Photographic lens system |
US6233101B1 (en) * | 1998-09-30 | 2001-05-15 | Fuji Photo Optical Co., Ltd. | Modified gaussian lens |
US10712541B2 (en) | 2014-11-12 | 2020-07-14 | Largan Precision Co., Ltd. | Photographing optical lens assembly, image capturing device and electronic device |
-
1980
- 1980-01-18 JP JP509980A patent/JPS56102819A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4671626A (en) * | 1984-03-21 | 1987-06-09 | Minolta Camera Kabushiki Kaisha | Photographic lens system |
US6233101B1 (en) * | 1998-09-30 | 2001-05-15 | Fuji Photo Optical Co., Ltd. | Modified gaussian lens |
US10712541B2 (en) | 2014-11-12 | 2020-07-14 | Largan Precision Co., Ltd. | Photographing optical lens assembly, image capturing device and electronic device |
US10871637B2 (en) | 2014-11-12 | 2020-12-22 | Largan Precision Co., Ltd. | Photographing optical lens assembly, image capturing device and electronic device |
US11262556B2 (en) | 2014-11-12 | 2022-03-01 | Largan Precision Co., Ltd. | Photographing optical lens assembly, image capturing device and electronic device |
US11614604B2 (en) | 2014-11-12 | 2023-03-28 | Largan Precision Co., Ltd. | Photographing optical lens assembly, image capturing device and electronic device |
US11867886B2 (en) | 2014-11-12 | 2024-01-09 | Largan Precision Co., Ltd. | Photographing optical lens assembly, image capturing device and electronic device |
Also Published As
Publication number | Publication date |
---|---|
JPS6161365B2 (en) | 1986-12-25 |
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