JPS6454410A - Small-sized inverted galilean finder - Google Patents
Small-sized inverted galilean finderInfo
- Publication number
- JPS6454410A JPS6454410A JP62209243A JP20924387A JPS6454410A JP S6454410 A JPS6454410 A JP S6454410A JP 62209243 A JP62209243 A JP 62209243A JP 20924387 A JP20924387 A JP 20924387A JP S6454410 A JPS6454410 A JP S6454410A
- Authority
- JP
- Japan
- Prior art keywords
- lens group
- refracting power
- finder
- positive
- principal point
- 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
- Viewfinders (AREA)
- Lenses (AREA)
Abstract
PURPOSE:To facilitate the manufacture and to compensate various aberrations excellently by composing the Inverted Galilean finder of a 1st lens group with negative refracting power, and 2nd lens group with positive refracting power, and a 3rd lens group with positive or negative refracting power. CONSTITUTION:This inverted Galilean finder consists of the 1st lens group with the positive refracting power, the 2nd lens group with the positive refracting power, and the 3rd lens group with the positive or negative refracting power in order from the object side so that expressions I and II hold. In the equation I, d1 is the interval (mm) between the pupil-side principal point of the 1st lens group and the object-side principal point of the 3rd lens group, d2 the interval (mm) between the pupil-side principal point of the 2nd lens group and the object- side principal point of the 3rd lens group, M the finder power, and phi1 the refracting power (1/mm) of the 1st lens group. Consequently, well-balanced aberration compensation is performed although the size is extremely small, and the excellent finder which provides good view is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62209243A JP2612710B2 (en) | 1987-08-25 | 1987-08-25 | Small inverted Galileo finder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62209243A JP2612710B2 (en) | 1987-08-25 | 1987-08-25 | Small inverted Galileo finder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6454410A true JPS6454410A (en) | 1989-03-01 |
JP2612710B2 JP2612710B2 (en) | 1997-05-21 |
Family
ID=16569730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62209243A Expired - Fee Related JP2612710B2 (en) | 1987-08-25 | 1987-08-25 | Small inverted Galileo finder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2612710B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106773009A (en) * | 2016-11-18 | 2017-05-31 | 玉晶光电(厦门)有限公司 | Eyepiece optical system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106773008B (en) * | 2016-11-18 | 2020-02-21 | 玉晶光电(厦门)有限公司 | Eyepiece optical system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59168738U (en) * | 1983-04-27 | 1984-11-12 | キヤノン株式会社 | Fine finder system |
JPS6179806U (en) * | 1984-10-29 | 1986-05-28 | ||
JPS61160416U (en) * | 1985-03-27 | 1986-10-04 | ||
JPS61270721A (en) * | 1985-05-27 | 1986-12-01 | Nippon Kogaku Kk <Nikon> | Magnification conversion type reverse galilean finder |
JPS6255203U (en) * | 1985-09-25 | 1987-04-06 |
-
1987
- 1987-08-25 JP JP62209243A patent/JP2612710B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59168738U (en) * | 1983-04-27 | 1984-11-12 | キヤノン株式会社 | Fine finder system |
JPS6179806U (en) * | 1984-10-29 | 1986-05-28 | ||
JPS61160416U (en) * | 1985-03-27 | 1986-10-04 | ||
JPS61270721A (en) * | 1985-05-27 | 1986-12-01 | Nippon Kogaku Kk <Nikon> | Magnification conversion type reverse galilean finder |
JPS6255203U (en) * | 1985-09-25 | 1987-04-06 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106773009A (en) * | 2016-11-18 | 2017-05-31 | 玉晶光电(厦门)有限公司 | Eyepiece optical system |
Also Published As
Publication number | Publication date |
---|---|
JP2612710B2 (en) | 1997-05-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS575021A (en) | Reverse telephoto type large-diameter wide angle lens | |
JPS5764207A (en) | Endoscope objective lens | |
JPS5735822A (en) | Zoom lens | |
JPS6438711A (en) | Zoom lens | |
JPS5730814A (en) | Photographic lens | |
JPS5363014A (en) | Inverse galiled finder of variable magnification type | |
JPS57177115A (en) | Projection lens device | |
JPS52121347A (en) | Objective lens for hard mirror | |
JPS5411755A (en) | Objective lens for microscope | |
JPS5211929A (en) | Telephoto lens of the short whole length | |
JPS5411754A (en) | Eye-piece photomicrography | |
JPS6454410A (en) | Small-sized inverted galilean finder | |
JPS5526545A (en) | Reproducing lens for video disc | |
JPS5796311A (en) | Telephoto lens | |
JPS5434252A (en) | Microscope objective lens | |
JPS6465520A (en) | Variable magnification finder | |
JPS5694318A (en) | Lens system provided with rear converter lens | |
JPS572012A (en) | Triplet lens having last diaphragm | |
JPS57164708A (en) | High resolving power lens | |
JPS56123510A (en) | Telecentric projection lens | |
JPS5436746A (en) | Objective lens of microscope | |
JPS6465519A (en) | Variable magnification finder | |
JPS5336226A (en) | Fore-placed diaphragm lens | |
JPS6474521A (en) | Rear focus type zoom lens | |
JPS57185010A (en) | Rear diaphragm tessar type camera lens |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |