FR1487806A - Perfectionnements aux objectifs optiques à focale variable - Google Patents
Perfectionnements aux objectifs optiques à focale variableInfo
- Publication number
- FR1487806A FR1487806A FR70939A FR70939A FR1487806A FR 1487806 A FR1487806 A FR 1487806A FR 70939 A FR70939 A FR 70939A FR 70939 A FR70939 A FR 70939A FR 1487806 A FR1487806 A FR 1487806A
- Authority
- FR
- France
- Prior art keywords
- optical lenses
- varifocal optical
- varifocal
- lenses
- optical
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
- G02B15/1445—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being negative
- G02B15/144507—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being negative arranged -++-
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Lens Barrels (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB31812/65A GB1109913A (en) | 1965-07-26 | 1965-07-26 | Improvements in or relating to optical objectives of variable equivalent focal length |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1487806A true FR1487806A (fr) | 1967-07-07 |
Family
ID=10328788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR70939A Expired FR1487806A (fr) | 1965-07-26 | 1966-07-26 | Perfectionnements aux objectifs optiques à focale variable |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH452219A (fr) |
DE (1) | DE1497560B1 (fr) |
FR (1) | FR1487806A (fr) |
GB (1) | GB1109913A (fr) |
NL (1) | NL6610525A (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57138612A (en) * | 1981-02-23 | 1982-08-27 | Nippon Kogaku Kk <Nikon> | Telephotographic zoom lens consisting of four groups |
JP3088112B2 (ja) * | 1990-10-12 | 2000-09-18 | 旭光学工業株式会社 | ズームレンズ |
JP3723643B2 (ja) * | 1996-08-12 | 2005-12-07 | ペンタックス株式会社 | 高変倍ズームレンズ系 |
JPH1054938A (ja) * | 1996-08-12 | 1998-02-24 | Asahi Optical Co Ltd | 大口径非球面ズームレンズ系 |
JP4208667B2 (ja) * | 2002-08-28 | 2009-01-14 | キヤノン株式会社 | ズームレンズおよび撮像装置 |
-
1965
- 1965-07-26 GB GB31812/65A patent/GB1109913A/en not_active Expired
-
1966
- 1966-07-23 DE DE19661497560 patent/DE1497560B1/de active Pending
- 1966-07-26 CH CH1082366A patent/CH452219A/fr unknown
- 1966-07-26 NL NL6610525A patent/NL6610525A/xx unknown
- 1966-07-26 FR FR70939A patent/FR1487806A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1497560B1 (de) | 1971-05-13 |
CH452219A (fr) | 1968-05-31 |
GB1109913A (en) | 1968-04-18 |
NL6610525A (fr) | 1967-01-27 |
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