JPS565518A - Optical correction type variable focal length lens system - Google Patents
Optical correction type variable focal length lens systemInfo
- Publication number
- JPS565518A JPS565518A JP8086879A JP8086879A JPS565518A JP S565518 A JPS565518 A JP S565518A JP 8086879 A JP8086879 A JP 8086879A JP 8086879 A JP8086879 A JP 8086879A JP S565518 A JPS565518 A JP S565518A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- convex
- lens group
- focal length
- positive
- 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
Landscapes
- Lenses (AREA)
Abstract
PURPOSE: To realize the variable focal length system for home video television cameras of optical correction system which enables variable power by extremely simple mechanism and permits making image plane position equal by letting respective constituting lenses and the specifications of the constituting lenses satisfy the specific conditions.
CONSTITUTION: This lens system consists of the 1st, the 2nd and the third lens group from the object side and is capable of changing focal length and making image plane position equal by moving only the 2nd lens group, with the rest being held stationary. From the object side and with respect to the concave and convex on the object side, the 1st lens group consists of a negative meniscus lens of a convex face and a positive lens of a convex lens of strong curvature, the 2nd lens group consists of one or two negative meniscus lenses of convex faces and a positive meniscus lens of a convex face and the 3rd lens group consists of a positive lens of a convex face of strong curvature and the cemented positive lens of the positive lens and negative meniscus lens of which the faces of extremely strong curvatures are made cemented faces. Conditions of (1)W(6) are satisfied.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54080868A JPS5811606B2 (en) | 1979-06-27 | 1979-06-27 | Optically corrected variable focal length lens system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54080868A JPS5811606B2 (en) | 1979-06-27 | 1979-06-27 | Optically corrected variable focal length lens system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS565518A true JPS565518A (en) | 1981-01-21 |
JPS5811606B2 JPS5811606B2 (en) | 1983-03-03 |
Family
ID=13730315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54080868A Expired JPS5811606B2 (en) | 1979-06-27 | 1979-06-27 | Optically corrected variable focal length lens system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5811606B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57147612A (en) * | 1981-03-07 | 1982-09-11 | Nippon Kogaku Kk <Nikon> | Zoom lens |
JPS62187315A (en) * | 1986-02-14 | 1987-08-15 | Ricoh Co Ltd | Extremely small-sized zoom lens |
JPS6474519A (en) * | 1987-09-16 | 1989-03-20 | Minolta Camera Kk | Zoom lens |
JPH01102511A (en) * | 1987-10-16 | 1989-04-20 | Minolta Camera Co Ltd | Two-focus lens |
JPH01201614A (en) * | 1988-02-08 | 1989-08-14 | Olympus Optical Co Ltd | Variable power lens |
CN108604001A (en) * | 2016-02-24 | 2018-09-28 | 松下知识产权经营株式会社 | Zoom-lens system, the photographic device with zoom-lens system and the vehicle with photographic device |
-
1979
- 1979-06-27 JP JP54080868A patent/JPS5811606B2/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57147612A (en) * | 1981-03-07 | 1982-09-11 | Nippon Kogaku Kk <Nikon> | Zoom lens |
JPS62187315A (en) * | 1986-02-14 | 1987-08-15 | Ricoh Co Ltd | Extremely small-sized zoom lens |
JPS6474519A (en) * | 1987-09-16 | 1989-03-20 | Minolta Camera Kk | Zoom lens |
JPH01102511A (en) * | 1987-10-16 | 1989-04-20 | Minolta Camera Co Ltd | Two-focus lens |
JPH01201614A (en) * | 1988-02-08 | 1989-08-14 | Olympus Optical Co Ltd | Variable power lens |
CN108604001A (en) * | 2016-02-24 | 2018-09-28 | 松下知识产权经营株式会社 | Zoom-lens system, the photographic device with zoom-lens system and the vehicle with photographic device |
CN108604001B (en) * | 2016-02-24 | 2020-12-15 | 松下知识产权经营株式会社 | Zoom lens system, image pickup apparatus having zoom lens system, and vehicle having image pickup apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS5811606B2 (en) | 1983-03-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS56128911A (en) | Subminiature zoom lens | |
JPS52117126A (en) | Telephoto lens system | |
JPS5744115A (en) | Reflex telephoto zoom lens system | |
JPS54119233A (en) | Finder optical system | |
JPS57190917A (en) | Superwide-angle zoom lens | |
JPS52113753A (en) | Zoom lens capable of simply changing variable focal length range | |
JPS559550A (en) | Zoom lens system | |
JPS5767908A (en) | Wide-angle zoom lens | |
JPS565518A (en) | Optical correction type variable focal length lens system | |
JPS5735821A (en) | Reverse telephoto lens | |
JPS55147607A (en) | Retrofocus type wide angle photographic lens | |
EP1046940A3 (en) | Zoom lens and video camera using the same | |
JPS5651709A (en) | Reverse telephoto type wide angle lens | |
JPS57173810A (en) | Optical system of endoscope objective lens | |
JPS5470826A (en) | Wide-angle objective lens | |
JPS5648607A (en) | Wide-angle zoom lens | |
JPS576820A (en) | Optical system for copying having temperature compensating lens | |
JPS57161824A (en) | Zoom lens system | |
JPS55111915A (en) | Zoom lens | |
JPS5643619A (en) | Wide angle zoom lens | |
JPS5590930A (en) | 4-group constitution lens | |
JPS561912A (en) | Copying variable power lens system | |
JPS5796311A (en) | Telephoto lens | |
JPS57165809A (en) | Telephoto lens system | |
JPS57132112A (en) | Gaussian photographic lens |