JPS54116919A - Lens system of front lens delivery type - Google Patents
Lens system of front lens delivery typeInfo
- Publication number
- JPS54116919A JPS54116919A JP2382578A JP2382578A JPS54116919A JP S54116919 A JPS54116919 A JP S54116919A JP 2382578 A JP2382578 A JP 2382578A JP 2382578 A JP2382578 A JP 2382578A JP S54116919 A JPS54116919 A JP S54116919A
- Authority
- JP
- Japan
- Prior art keywords
- group
- stands
- aberration
- distance
- lens
- 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 produce a highly efficient and compact lens system by making possible the range finding operation from infinity to a close range with a remarkably small delivery and by reducing the fluctuation in aberration when the distance to an object is varied.
CONSTITUTION: There are arranged from the side of an object a first group, a second group, a slit and a fourth group. The focusing operation is carried out by moving the first group in the direction of an optical axis. The first group is composed of a negative meniscus lens having its convex side facing the object, and a positive lens having its convex side facing the object. The second group is composed of two concave lenses, whereas the third group is composed of two concave lenses and two convex lenses. By satisfying the conditions expressed by Equations (1) to (4), the aberration generated by the first group can be reduced. By satisfying the conditions expressed by Equations (5) to (8), moreover, the fluctuations in the aberration due to the variation in the distance to the object can be eliminated, and at the same time the aberration of a reference distance to the object can be satisfactorily compensated. Here, ν stands for Abbe's number; N stands for a refractive index; R stands for radius of curvature; and f stands for a focal length.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2382578A JPS54116919A (en) | 1978-03-02 | 1978-03-02 | Lens system of front lens delivery type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2382578A JPS54116919A (en) | 1978-03-02 | 1978-03-02 | Lens system of front lens delivery type |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54116919A true JPS54116919A (en) | 1979-09-11 |
JPS6155085B2 JPS6155085B2 (en) | 1986-11-26 |
Family
ID=12121130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2382578A Granted JPS54116919A (en) | 1978-03-02 | 1978-03-02 | Lens system of front lens delivery type |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54116919A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2825657B2 (en) * | 1992-03-30 | 1998-11-18 | ポラロイド コーポレーシヨン | Compact objective lens with two lens groups |
-
1978
- 1978-03-02 JP JP2382578A patent/JPS54116919A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2825657B2 (en) * | 1992-03-30 | 1998-11-18 | ポラロイド コーポレーシヨン | Compact objective lens with two lens groups |
Also Published As
Publication number | Publication date |
---|---|
JPS6155085B2 (en) | 1986-11-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5764207A (en) | Endoscope objective lens | |
JPS5744115A (en) | Reflex telephoto zoom lens system | |
JPS5432319A (en) | Fish eye lens | |
JPS57202512A (en) | Diopter adjusting eyepiece | |
JPS55163510A (en) | Telephoto lens | |
JPS54157620A (en) | Photographic telephoto lens | |
JPS5659217A (en) | Lens for compact camera of short overall length using aspherical face | |
JPS554068A (en) | Focusing lens for video disc | |
JPS5397824A (en) | Camera lens of behind iris | |
JPS5643618A (en) | Attachment lens | |
JPS5648607A (en) | Wide-angle zoom lens | |
JPS54158225A (en) | Photographic lens having long back focus and large aperture ratio | |
JPS56126819A (en) | Compact telephoto zoom lens | |
JPS64512A (en) | Albada system zoom finder | |
JPS5470826A (en) | Wide-angle objective lens | |
JPS5779909A (en) | Optical system for astronomical telescope | |
JPS5444519A (en) | Wide angle leins | |
JPS5470827A (en) | Telephoto lens | |
JPS557712A (en) | Compact standard zoom lens | |
JPS5643619A (en) | Wide angle zoom lens | |
JPS56132306A (en) | Small-sized zoom lens | |
JPS57122412A (en) | Reverse telephoto type large aperture wide angle lens | |
JPS56161517A (en) | Telephoto zoom lens | |
JPS54116919A (en) | Lens system of front lens delivery type | |
JPS55111915A (en) | Zoom lens |